10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 10-Q

xQUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended June 30, 2018 or

¨TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from __________ to __________

Commission File Number 000-29480

HERITAGE FINANCIAL CORPORATION

(Exact name of registrant as specified in its charter)

Washington	91-1857900
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)
201 Fifth Avenue SW, Olympia, WA	98501
(Address of principal executive offices)	(Zip Code)

(360) 943-1500

(Registrant’s telephone number, including area code)

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.    Yes  ý    No  ¨

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).    Yes  ý    No  ¨

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

Large accelerated filer  ý	Accelerated filer  ¨
Non-accelerated filer  ¨ (Do not check if a smaller reporting company)	Smaller reporting company  ¨
	Emerging growth company  ¨

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ¨

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).   Yes  ¨    No  ý

Indicate the number of shares outstanding of each of the issuer’s classes of common stock, as of the last practicable date:

As of July 31, 2018 there were 36,868,578 shares of the registrant's common stock, no par value per share, outstanding.

HERITAGE FINANCIAL CORPORATION

FORM 10-Q

June 30, 2018

TABLE OF CONTENTS

				Page
FORWARD LOOKING STATEMENTS
PART I.	FINANCIAL INFORMATION			4
ITEM 1.	FINANCIAL STATEMENTS			4
		CONDENSED CONSOLIDATED STATEMENTS OF FINANCIAL CONDITION AS OF JUNE 30, 2018 AND DECEMBER 31, 2017		4
		CONDENSED CONSOLIDATED STATEMENTS OF INCOME FOR THE THREE AND SIX MONTHS ENDED JUNE 30, 2018 AND 2017		5
		CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME FOR THE THREE AND SIX MONTHS ENDED JUNE 30, 2018 AND 2017		6
		CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY FOR THE SIX MONTHS ENDED JUNE 30, 2018 AND 2017		7
		CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS FOR THE SIX MONTHS ENDED JUNE 30, 2018 AND 2017		8
		NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS		10
		NOTE 1.	DESCRIPTION OF BUSINESS, BASIS OF PRESENTATION, SIGNIFICANT ACCOUNTING POLICIES AND RECENTLY ISSUED ACCOUNTING PRONOUNCEMENTS	10
		NOTE 2.	BUSINESS COMBINATION	14
		NOTE 3.	INVESTMENT SECURITIES	16
		NOTE 4.	LOANS RECEIVABLE	19
		NOTE 5.	ALLOWANCE FOR LOAN LOSSES	31
		NOTE 6.	OTHER REAL ESTATE OWNED	35
		NOTE 7.	GOODWILL AND OTHER INTANGIBLE ASSETS	35
		NOTE 8.	JUNIOR SUBORDINATED DEBENTURES	36
		NOTE 9.	REPURCHASE AGREEMENTS	37
		NOTE 10.	OTHER BORROWINGS	37
		NOTE 11.	DERIVATIVE FINANCIAL INSTRUMENTS	38
		NOTE 12.	STOCKHOLDERS’ EQUITY	38
		NOTE 13.	ACCUMULATED OTHER COMPREHENSIVE (LOSS) INCOME	40
		NOTE 14.	FAIR VALUE MEASUREMENTS	40
		NOTE 15.	STOCK-BASED COMPENSATION	45
		NOTE 16.	CASH REQUIREMENT	47
		NOTE 17.	SUBSEQUENT EVENT	48
ITEM 2.	MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS			48
ITEM 3.	QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK			72
ITEM 4.	CONTROLS AND PROCEDURES			72
Part II.	OTHER INFORMATION			72
ITEM 1.	LEGAL PROCEEDINGS			72
ITEM 1A.	RISK FACTORS			72
ITEM 2.	UNREGISTERED SALES OF EQUITY SECURITIES AND USE OF PROCEEDS			73
ITEM 3.	DEFAULTS UPON SENIOR SECURITIES			73
ITEM 4.	MINE SAFETY DISCLOSURES			73
ITEM 5.	OTHER INFORMATION			73
ITEM 6.	EXHIBITS			74
	SIGNATURES			74

2

FORWARD LOOKING STATEMENTS:

This Quarterly Report on Form 10-Q ("Form 10-Q") may contain forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. Forward-looking statements often include the words “believes,” “expects,” “anticipates,” “estimates,” “forecasts,” “intends,” “plans,” “targets,” “potentially,” “probably,” “projects,” “outlook” or similar expressions or future or conditional verbs such as “may,” “will,” “should,” “would” and “could.” These forward-looking statements are subject to known and unknown risks, uncertainties and other factors that could cause actual results to differ materially from the results anticipated, including: our ability to successfully integrate any assets, liabilities, customers, systems, and management personnel from our recent mergers with Puget Sound Bancorp, Inc., and Premier Commercial Bancorp, into our operations and our ability to realize related revenue synergies and cost savings within expected time frames or at all, and any goodwill charges related thereto and costs or difficulties relating to integration matters, including but not limited to customer and employee retention, which might be greater than expected; the credit risks of lending activities, including changes in the level and trend of loan delinquencies and write-offs and changes in our allowance for loan losses and provision for loan losses that may be effected by deterioration in the housing and commercial real estate markets, which may lead to increased losses and nonperforming assets in our loan portfolio, and may result in our allowance for loan losses no longer being adequate to cover actual losses, and require us to increase our allowance for loan losses; changes in general economic conditions, either nationally or in our market areas; changes in the levels of general interest rates, and the relative differences between short and long term interest rates, deposit interest rates, our net interest margin and funding sources; risks related to acquiring assets in or entering markets in which we have not previously operated and may not be familiar; fluctuations in the demand for loans, the number of unsold homes and other properties and fluctuations in real estate values in our market areas; results of examinations of us by the bank regulators, including the possibility that any such regulatory authority may, among other things, initiate an enforcement action against the Company or our bank subsidiary which could require us to increase our allowance for loan losses, write-down assets, change our regulatory capital position, affect our ability to borrow funds or maintain or increase deposits, or impose additional requirements on us, any of which could affect our ability to continue our growth through mergers, acquisitions or similar transactions and adversely affect our liquidity and earnings; legislative or regulatory changes that adversely affect our business including but not limited to, the Dodd-Frank Wall Street Reform and Consumer Protection Act of 2010 and implementing regulations, changes in regulatory policies and principles, or the interpretation of regulatory capital or other rules as a result of Basel III; our ability to control operating costs and expenses; increases in premiums for deposit insurance; the use of estimates in determining fair value of certain of our assets, which estimates may prove to be incorrect and result in significant declines in valuation; difficulties in reducing risk associated with the loans on our Condensed Consolidated Statements of Financial Condition; staffing fluctuations in response to product demand or the implementation of corporate strategies that affect our workforce and potential associated charges; disruptions, security breaches, or other adverse events, failures or interruptions in, or attacks on, our information technology systems or on the third-party vendors who perform several of our critical processing functions; our ability to retain key members of our senior management team; costs and effects of litigation, including settlements and judgments; our ability to implement our growth strategies; increased competitive pressures among financial service companies; changes in consumer spending, borrowing and savings habits; the availability of resources to address changes in laws, rules, or regulations or to respond to regulatory actions; adverse changes in the securities markets; inability of key third-party providers to perform their obligations to us; changes in accounting policies and practices, as may be adopted by the financial institution regulatory agencies or the Financial Accounting Standards Board ("FASB"), including additional guidance and interpretation on accounting issues and details of the implementation of new accounting methods; and other economic, competitive, governmental, regulatory, and technological factors affecting our operations, pricing, products and services and other risks detailed from time to time in our filings with the Securities and Exchange Commission including our Annual Report on Form 10-K for the year ended December 31, 2017.

The Company cautions readers not to place undue reliance on any forward-looking statements. Moreover, you should treat these statements as speaking only as of the date they are made and based only on information then actually known to the Company. The Company does not undertake and specifically disclaims any obligation to revise any forward-looking statements to reflect the occurrence of anticipated or unanticipated events or circumstances after the date of such statements. These risks could cause our actual results for future periods to differ materially from those expressed in any forward-looking statements by, or on behalf of, us, and could negatively affect the Company’s operating results and stock price performance.

As used throughout this report, the terms “we”, “our”, “us”, or the “Company” refer to Heritage Financial Corporation and its consolidated subsidiaries, unless the context otherwise requires.

3

PART I.     FINANCIAL INFORMATION

ITEM 1.     FINANCIAL STATEMENTS

HERITAGE FINANCIAL CORPORATION AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF FINANCIAL CONDITION (Unaudited)

(In thousands, except shares)

	June 30, 2018			December 31, 2017
ASSETS
Cash on hand and in banks	$	94,210		$	78,293
Interest earning deposits	35,733			24,722
Cash and cash equivalents	129,943			103,015
Investment securities available for sale, at fair value	873,670			810,530
Loans held for sale	3,598			2,288
Loans receivable, net	3,328,288			2,849,071
Allowance for loan losses	(33,972		)	(32,086		)
Total loans receivable, net	3,294,316			2,816,985
Other real estate owned	434			—
Premises and equipment, net	75,364			60,325
Federal Home Loan Bank stock, at cost	8,616			8,347
Bank owned life insurance	82,031			75,091
Accrued interest receivable	13,482			12,244
Prepaid expenses and other assets	104,718			99,328
Other intangible assets, net	15,767			6,088
Goodwill	187,549			119,029
Total assets	$	4,789,488		$	4,113,270
LIABILITIES AND STOCKHOLDERS' EQUITY
Deposits	$	3,968,935		$	3,393,060
Federal Home Loan Bank advances	75,500			92,500
Junior subordinated debentures	20,156			20,009
Securities sold under agreement to repurchase	22,168			31,821
Accrued expenses and other liabilities	63,206			67,575
Total liabilities	4,149,965			3,604,965
Stockholders’ equity:
Preferred stock, no par value, 2,500,000 shares authorized; no shares issued and outstanding at June 30, 2018 and December 31, 2017	—			—
Common stock, no par value, 50,000,000 shares authorized; 34,021,094 and 29,927,746 shares issued and outstanding at June 30, 2018 and December 31, 2017, respectively	491,026			360,590
Retained earnings	159,803			149,013
Accumulated other comprehensive loss, net	(11,306		)	(1,298		)
Total stockholders’ equity	639,523			508,305
Total liabilities and stockholders’ equity	$	4,789,488		$	4,113,270

See accompanying Notes to Condensed Consolidated Financial Statements.

4

HERITAGE FINANCIAL CORPORATION AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF INCOME (Unaudited)

(In thousands, except per share amounts)

	Three Months Ended June 30,				Six Months Ended June 30,
	2018		2017		2018		2017
INTEREST INCOME
Interest and fees on loans	$	41,141	$	31,500	$	79,300	$	61,985
Taxable interest on investment securities	4,068		3,141		7,597		6,190
Nontaxable interest on investment securities	1,220		1,304		2,561		2,572
Interest on other interest earning assets	242		96		460		143
Total interest income	46,671		36,041		89,918		70,890
INTEREST EXPENSE
Deposits	2,195		1,407		4,155		2,673
Junior subordinated debentures	315		249		598		487
Other borrowings	418		251		585		464
Total interest expense	2,928		1,907		5,338		3,624
Net interest income	43,743		34,134		84,580		67,266
Provision for loan losses	1,750		1,131		2,902		1,998
Net interest income after provision for loan losses	41,993		33,003		81,678		65,268
NONINTEREST INCOME
Service charges and other fees	4,695		4,426		9,238		8,639
Gain on sale of investment securities, net	18		117		53		117
Gain on sale of loans, net	706		4,138		1,580		5,333
Interest rate swap fees	309		282		360		415
Other income	1,845		1,746		3,890		3,568
Total noninterest income	7,573		10,709		15,121		18,072
NONINTEREST EXPENSE
Compensation and employee benefits	19,321		16,272		40,688		32,296
Occupancy and equipment	4,810		3,818		9,437		7,628
Data processing	2,507		2,002		5,112		3,917
Marketing	823		805		1,631		1,612
Professional services	3,529		1,053		6,366		2,062
State and local taxes	716		639		1,404		1,188
Federal deposit insurance premium	375		357		730		657
Other real estate owned, net	—		21		—		52
Amortization of intangible assets	796		323		1,591		647
Other expense	2,829		2,519		5,494		4,973
Total noninterest expense	35,706		27,809		72,453		55,032
Income before income taxes	13,860		15,903		24,346		28,308
Income tax expense	2,003		4,075		3,402		7,164
Net income	$	11,857	$	11,828	$	20,944	$	21,144
Basic earnings per common share	$	0.35	$	0.40	$	0.62	$	0.71
Diluted earnings per common share	$	0.35	$	0.40	$	0.62	$	0.71
Dividends declared per common share	$	0.15	$	0.13	$	0.30	$	0.25

See accompanying Notes to Condensed Consolidated Financial Statements.

5

HERITAGE FINANCIAL CORPORATION AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited)

(In thousands)

	Three Months Ended June 30,						Six Months Ended June 30,
	2018			2017			2018			2017
Net income	$	11,857		$	11,828		$	20,944		$	21,144
Change in fair value of investment securities available for sale, net of tax of $(630), $1,491, $(2,638) and $2,285, respectively	(2,358		)	2,766			(9,874		)	4,239
Reclassification adjustment for net gain from sale of investment securities available for sale included in income, net of tax of $(4), $(41), $(12) and $(41), respectively	(14		)	(76		)	(41		)	(76		)
Other comprehensive (loss) income	(2,372		)	2,690			(9,915		)	4,163
Comprehensive income	$	9,485		$	14,518		$	11,029		$	25,307

See accompanying Notes to Condensed Consolidated Financial Statements.

6

HERITAGE FINANCIAL CORPORATION AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Unaudited)

(In thousands, except per share amounts)

	Number of common shares		Common stock			Retained earnings			Accumulated other comprehensive income (loss), net			Total stock- holders’ equity
Balance at December 31, 2016	29,955		$	359,060		$	125,309		$	(2,606	)	$	481,763
Restricted stock awards forfeited	(7	)	—			—			—			—
Exercise of stock options	8		109			—			—			109
Stock-based compensation expense	—		1,040			—			—			1,040
Common stock repurchased	(28	)	(674		)	—			—			(674		)
Net income	—		—			21,144			—			21,144
Other comprehensive income, net of tax	—		—			—			4,163			4,163
Cash dividends declared on common stock ($0.25 per share)	—		—			(7,497		)	—			(7,497		)
Balance at June 30, 2017	29,928		$	359,535		$	138,956		$	1,557		$	500,048
Balance at December 31, 2017	29,928		$	360,590		$	149,013		$	(1,298	)	$	508,305
Restricted stock units vested, net of forfeitures of restricted stock awards	30		—			—			—			—
Exercise of stock options	3		47			—			—			47
Stock-based compensation expense	—		1,307			—			—			1,307
Common stock repurchased	(52	)	(1,688		)	—			—			(1,688		)
Net income	—		—			20,944			—			20,944
Other comprehensive loss, net of tax	—		—			—			(9,915		)	(9,915		)
Common stock issued in business combination	4,112		130,770			—			—			130,770
Cash dividends declared on common stock ($0.30 per share)	—		—			(10,247		)	—			(10,247		)
ASU 2016-01 implementation	—		—			93			(93		)	—
Balance at June 30, 2018	34,021		$	491,026		$	159,803		$	(11,306	)	$	639,523

See accompanying Notes to Condensed Consolidated Financial Statements.

7

HERITAGE FINANCIAL CORPORATION AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited)

(In thousands)

	Six Months Ended June 30,
	2018			2017
Cash flows from operating activities:
Net income	$	20,944		$	21,144
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	5,140			5,459
Changes in net deferred loan costs, net of amortization	(254		)	(509		)
Provision for loan losses	2,902			1,998
Net change in accrued interest receivable, prepaid expenses and other assets, accrued expenses and other liabilities	419			3,482
Stock-based compensation expense	1,307			1,040
Amortization of intangible assets	1,591			647
Origination of loans held for sale	(40,048		)	(54,449		)
Proceeds from sale of loans	39,962			71,436
Earnings on bank owned life insurance	(666		)	(747		)
Gain on sale of loans, net	(1,580		)	(5,333		)
Gain on sale of investment securities, net	(53		)	(117		)
Gain on sale of assets held for sale	—			(53		)
Impairment of assets held for sale	75			—
Loss on sale or write-off of furniture, equipment and leasehold improvements	—			12
Net cash provided by operating activities	29,739			44,010
Cash flows from investing activities:
Loans originated, net of principal payments	(96,127		)	(135,709		)
Maturities, calls and payments of investment securities available for sale	41,436			52,461
Purchase of investment securities available for sale	(147,360		)	(57,972		)
Purchase of premises and equipment	(16,659		)	(1,382		)
Proceeds from sales of other loans	4,532			21,319
Proceeds from sales of investment securities available for sale	107,579			15,032
Proceeds from sale of assets held for sale	—			265
Proceeds from redemption of Federal Home Loan Bank stock	22,138			16,456
Purchases of Federal Home Loan Bank stock	(21,784		)	(17,975		)
Proceeds from sale of premises and equipment	21			—
Capital contribution to low-income housing tax credit partnership	(8,169		)	(7		)
Net cash received from acquisitions	80,133			—
Net cash used in investing activities	(34,260		)	(107,512		)
Cash flows from financing activities:
Net increase in deposits	69,990			61,602
Federal Home Loan Bank advances	536,450			442,700
Repayments of Federal Home Loan Bank advances	(553,450		)	(411,400		)
Common stock cash dividends paid	(10,247		)	(7,497		)
Net decrease in securities sold under agreement to repurchase	(9,653		)	(849		)
Proceeds from exercise of stock options	47			109
Repurchase of common stock	(1,688		)	(674		)
Net cash provided by financing activities	31,449			83,991

8

	Six Months Ended June 30,
	2018			2017
Net increase in cash and cash equivalents	26,928			20,489
Cash and cash equivalents at beginning of period	103,015			103,745
Cash and cash equivalents at end of period	$	129,943		$	124,234
Supplemental disclosures of cash flow information:
Cash paid for interest	$	5,302		$	3,688
Cash paid for income taxes	2,724			1,007
Supplemental non-cash disclosures of cash flow information:
Transfers of loans receivable to other real estate owned	$	434		$	32
Transfers of loans receivable to loans held for sale	—			5,779
Transfers of properties held for sale recorded in premises and equipment, net to prepaid expenses and other assets	221			2,687
Purchases of investment securities available for sale not settled	—			2,268
Business Combination:
Common stock issued for business combinations	130,770			—
Assets acquired (liabilities assumed) in acquisitions:
Investment securities available for sale	80,353			—
Loans receivable	388,462			—
Premises and equipment	732			—
Federal Home Loan Bank stock	623			—
Accrued interest receivable	1,448			—
Bank owned life insurance	6,264			—
Prepaid expenses and other assets	1,354			—
Other intangible assets	11,270			—
Deposits	(505,885		)	—
Accrued expenses and other liabilities	(2,504		)	—

See accompanying Notes to Condensed Consolidated Financial Statements.

9

HERITAGE FINANCIAL CORPORATION AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (Unaudited)

(1) Description of Business, Basis of Presentation, Significant Accounting Policies and Recently Issued Accounting Pronouncements

(a) Description of Business

Heritage Financial Corporation ("Heritage" or the “Company”) is a bank holding company that was incorporated in the State of Washington in August 1997. The Company is primarily engaged in the business of planning, directing and coordinating the business activities of its wholly-owned subsidiary, Heritage Bank (the “Bank”). The Bank is a Washington-chartered commercial bank and its deposits are insured by the Federal Deposit Insurance Corporation ("FDIC"). The Bank is headquartered in Olympia, Washington and conducts business from its 59 branch offices as of June 30, 2018 located throughout Washington State and the greater Portland, Oregon area. The Bank’s business consists primarily of commercial lending and deposit relationships with small businesses and their owners in its market areas and attracting deposits from the general public. The Bank also makes real estate construction and land development loans, consumer loans and originates first mortgage loans on residential properties primarily located in its market areas.

On January 16, 2018, the Company completed the acquisition of Puget Sound Bancorp, Inc. (“Puget Sound”), the holding company for Puget Sound Bank, both of Bellevue, Washington (“Puget Sound Merger”). See Note (2) Business Combination for additional information on the merger.

On March 8, 2018, the Company entered into a definitive agreement to acquire Premier Commercial Bancorp, ("Premier Commercial") and its wholly-owned bank subsidiary, Premier Community Bank, both of Hillsboro, Oregon (the "Premier Merger"). The Premier Merger was completed on July 2, 2018. See Note (17) Subsequent Event for additional information on the merger.

(b) Basis of Presentation

The accompanying unaudited Condensed Consolidated Financial Statements have been prepared in accordance with the accounting principles generally accepted in the United States (“U.S. GAAP”) for interim financial information and pursuant to the rules and regulations of the Securities and Exchange Commission ("SEC"). Accordingly, they do not include all of the information and footnotes required by U.S. GAAP for complete financial statements. It is recommended that these unaudited Condensed Consolidated Financial Statements and accompanying Notes be read with the audited Consolidated Financial Statements and the accompanying Notes included in the Company's Annual Report on Form 10-K for the year ended December 31, 2017 (“2017 Annual Form 10-K”). In management's opinion, all adjustments (consisting only of normal recurring adjustments) considered necessary for a fair presentation have been included. Operating results for the three and six months ended June 30, 2018 are not necessarily indicative of the results that may be expected for the year ending December 31, 2018. In preparing the unaudited Condensed Consolidated Financial Statements, management is required to make estimates and assumptions that affect the reported amounts of assets, liabilities, revenues, expenses and related disclosures. Management believes that the judgments, estimates and assumptions used in the preparation of the financial statements are appropriate based on the facts and circumstances at the time. Actual results, however, could differ significantly from those estimates.

(c) Significant Accounting Policies

The significant accounting policies used in preparation of the Company's Condensed Consolidated Financial Statements are disclosed in the 2017 Annual Form 10-K. There have not been any material changes in the Company's significant accounting policies from those contained in the 2017 Annual Form 10-K, except for the accounting policy relating to revenue from contracts with customers adopted January 1, 2018, as discussed below.

Revenue from Contracts with Customers

Accounting Standards Codification Topic 606, Revenue from Contracts with Customers, (“ASC 606”), as amended, was adopted by the Company on January 1, 2018. ASC 606 applies to all contracts with customers to provide goods or services in the ordinary course of business, except for contracts that are specifically excluded from its scope.  The Company's revenues are primarily composed of interest income on financial instruments, such as loans and investment securities, which are excluded from the scope of ASC 606.  Descriptions of our revenue-generating activities that are within the scope ASC 606, which are presented in Service Charges and Other Fees and Other Income on the Company’s Condensed Consolidated Statement of Income, are as follows:

10

• Service Charges on Deposit Accounts: The Company earns fees from its deposit customers from a variety of deposit products and services.  Non-transaction based fees such as account maintenance fees and monthly statement fees are considered to be provided to the customer under a day-to-day contract with ongoing renewals. Revenues for these non-transaction fees are earned over the course of a month, representing the period over which the Company satisfies the performance obligation.  Transaction-based fees such as non-sufficient fund charges, stop payment charges and wire fees are recognized at the time the transaction is executed as the contract duration does not extend beyond the service performed. 

• Wealth Management and Trust Services: The Company earns fees from contracts with customers for fiduciary and brokerage activities. Revenues are generally recognized on a monthly basis and are generally based on a percentage of the customer’s assets under management or based on investment or insurance solutions that are implemented for the customer.

• Merchant Processing Services and Debit and Credit Card Fees: The Company earns fees from cardholder transactions conducted through third party payment network providers which consist of (i) interchange fees earned from the payment network as a debit card issuer, (ii) referral fee income, and (iii) ongoing merchant fees earned for referring customers to the payment processing provider.  These fees are recognized when the transaction occurs, but may settle on a daily or monthly basis. 

(d) Recently Issued Accounting Pronouncements

FASB ASU 2014-09, Revenue from Contracts with Customers, (as amended by FASB ASU 2015-14; FASB ASU 2016-08; FASB ASU 2016-10 and FASB ASU 2016-12), was issued in May 2014. Under this Accounting Standard Update ("ASU" or "Update"), the Financial Accounting Standards Board ("FASB") created a new Topic 606 which is in response to a joint initiative of FASB and the International Accounting Standards Board to clarify the principles for recognizing revenue and to develop a common revenue standard for U.S. GAAP and international financial reporting standards that would:

• Remove inconsistencies and weaknesses in revenue requirements.

• Provide a more robust framework for addressing revenue issues.

• Improve comparability of revenue recognition practices across entities, industries, jurisdictions and capital markets.

• Provide more useful information to users of financial statements through improved disclosure requirements.

• Simplify the preparation of financial statements by reducing the number of requirements to which an entity must refer.

The Company adopted the revenue recognition guidance, as amended, on January 1, 2018 using the modified retrospective approach. A significant amount of the Company’s revenues are derived from interest income on financial assets, which are excluded from the scope of the amended guidance. With respect to noninterest income and related disclosures, the Company has identified and evaluated the revenue streams and underlying revenue contracts within the scope of the guidance. The Company did not identify any significant changes in the timing of revenue recognition when considering the amended accounting guidance. The adoption of the Update did not have a material impact on the Company's Condensed Consolidated Financial Statements, but the adoption did change certain disclosure requirements as described in Significant Accounting Policies above.

FASB ASU 2016-01, Recognition and Measurement of Financial Assets and Financial Liabilities (Subtopic 825-10), was issued in January 2016, to enhance the reporting model for financial instruments to provide users of financial statements with more decision-useful information. This Update contains several provisions, including but not limited to (1) requiring equity investments, with certain exceptions, to be measured at fair value with changes in fair value recognized in net income; (2) simplifying the impairment assessment of equity investments without readily determinable fair values by requiring a qualitative assessment to identify impairment; (3) eliminating the requirement to disclose the method(s) and significant assumptions used to estimate fair value; and (4) requiring separate presentation of financial assets and liabilities by measurement category and form of financial asset on the balance sheet or the accompanying notes to the financial statements. The Update also changes certain financial statement disclosure requirements, including requiring disclosures of the fair value of financial instruments be made on the basis of exit price. The Company adopted this Update effective January 1, 2018 using the cumulative catch-up transition method. This change resulted in a cumulative adjustment of $93,000 from accumulated other comprehensive loss, net to retained earnings for the unrealized gain related to the Company's equity security. The Company's processes and procedures utilized to estimate the fair value of loans receivable and certificate of deposit accounts for disclosure

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requirements were additionally changed due to adoption of this Update. Previously, the Company valued these items using an entry price notion. This ASU emphasized that these instruments be measured using the exit price notion; accordingly, the Company refined its calculation as part of adopting this Update. Prior period information has not been updated to conform with the new guidance. See the Condensed Consolidated Statements of Stockholders' Equity and Note (14) Fair Value Measurements.

FASB ASU 2016-02, Leases (Topic 842) was originally issued in February 2016, to increase transparency and comparability of leases among organizations and to disclose key information about leasing arrangements. The Update sets out the principles for the recognition, measurement, presentation and disclosure of leases for both lessees and lessors. The Update requires lessees to apply a dual approach, classifying leases as either a finance or operating lease. This classification will determine whether the lease expense is recognized based on an effective interest method or on a straight-line basis over the term of the lease. A lessee is also required to record a right-of-use asset and a lease liability for all leases with a term greater than 12 months regardless of their classification. All cash payments will be classified within operating activities in the statement of cash flows. In transition, lessees and lessors are required to recognize and measure leases at the beginning of the earliest period presented using a modified retrospective approach. The Update is effective for public entities for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. The Company anticipates adopting the Update on January 1, 2019. Upon adoption of the guidance, the Company expects to report increased assets and increased liabilities on its Condensed Consolidated Statements of Financial Condition as a result of recognizing right-of-use assets and lease liabilities related to certain banking offices and certain equipment under noncancelable operating lease agreements, which currently are not reflected in its Condensed Consolidated Statements of Financial Condition.  During 2017, management developed its methodology to estimate the right-of use assets and lease liabilities. The Company anticipates electing an exclusion accounting policy for lease assets and lease liabilities for leases with a term of twelve months or less. The Company was committed to $13.7 million of minimum lease payments under noncancelable operating lease agreements at June 30, 2018. The Company does not expect the adoption of this Update will have a significant impact to its Condensed Consolidated Financial Statements.

FASB ASU 2016-13, Financial Instruments: Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments, was issued in June 2016. Commonly referred to as the current expected credit loss model ("CECL"), this Update requires financial assets measured at amortized cost basis to be presented at the net amount expected to be collected. The allowance for credit losses is a valuation account that is deducted from the amortized cost basis of the financial asset to present the net carrying value at the amount expected to be collected on the financial asset. The measurement of expected credit losses is based on relevant information about past events including historical experience, current conditions and reasonable and supportable forecasts that affect the collectibility of the reported amount. The amendment affects loans, debt securities, trade receivables, net investments in leases, off-balance-sheet credit exposures, reinsurance receivables and any other financial asset not excluded from the scope that have the contractual right to receive cash. The Update replaces the incurred loss impairment methodology, which generally only considered past events and current conditions, with a methodology that reflects the expected credit losses and required consideration of a broader range of reasonable and supportable information to estimate all expected credit losses. The Update additionally addresses purchased assets and introduces the purchased financial asset with a more-than-insignificant amount of credit deterioration since origination ("PCD"). The accounting for these PCD assets is similar to the existing accounting guidance of FASB ASC 310-30, Loans and Debt Securities Acquired with Deteriorated Credit Quality, for PCI assets, except the subsequent improvements in estimated cash flows will be immediately recognized into income, similar to the immediate recognition of subsequent deteriorations in cash flows. Current guidance only allows for the prospective recognition of these cash flow improvements. Because the terminology has been changed to a "more-than-insignificant" amount of credit deterioration, the presumption is that more assets might qualify for this accounting under the Update than those under current guidance. For public business entities, the Update is effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years with early adoption permitted for fiscal years after December 15, 2018. An entity will apply the Update through a cumulative-effect adjustment to retained earnings as of the beginning of the first reporting period in which the guidance is adopted. A prospective transition approach is required for debt securities. An entity that has previously applied the guidance of FASB ASC 310-30 will prospectively apply the guidance in this Update for PCD assets. A prospective transition approach should be used for PCD assets where upon adoption, the amortized cost basis should be adjusted to reflect the addition of the allowance for credit losses. The Company is anticipating adopting the Update on January 1, 2020. Upon adoption, the Company expects a change in the processes, internal controls and procedures to calculate the allowance for loan losses, including changes in assumptions and estimates to consider expected credit losses over the life of the loan versus the current accounting practice that utilizes the incurred loss model. The new guidance may result in an increase in the allowance for loan losses which will also reflect the new requirement to include the nonaccretable principal differences on PCI loans; however, the Company is still in the process of determining the magnitude of the increase and its impact on the Condensed Consolidated Financial Statements. In addition, the current

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accounting policy and procedures for other-than-temporary impairment on investment securities available for sale will be replaced with an allowance approach. During 2017, the Company's management created a CECL steering committee which has begun developing and implementing processes and procedures to ensure it is fully compliant with the amendments at the adoption date. To date, the CECL steering committee has selected a vendor to assist the Company in the adoption and has completed the implementation discovery sessions. The CECL steering committee is in the process of selecting appropriate methodologies and refining key data points in an effort to complete a mock CECL model by fourth quarter 2018.

FASB ASU 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments, was issued in August 2016. The Update addresses eight specific cash flow issues with the objective of reducing the existing diversity in practice. For public business entities, the guidance was effective for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years, and must be applied using a retrospective transitional method to each period presented. The Company adopted this Update on January 1, 2018. The adoption did not have a significant impact on its Condensed Consolidated Financial Statements as cash proceeds received from the settlement of bank-owned life insurance policies and cash payments for premiums on bank-owned life insurance policies were previously classified as cash inflows and outflows, respectively, from investing activities in the Condensed Consolidated Statements of Cash Flows.

FASB ASU 2017-04, Goodwill (Topic 350), was issued in January 2017 and eliminates Step 2 from the goodwill impairment test. Under the amendments, an entity should perform its goodwill impairment test by comparing the fair value of a reporting unit with its carrying amount. An entity should recognize an impairment charge for the amount by which the carrying amount exceeds the reporting unit’s fair value. The loss recognized, however, should not exceed the total amount of goodwill allocated to that reporting unit. Additionally, an entity should consider income tax effects from any tax deductible goodwill on the carrying amount of the reporting unit when measuring the goodwill impairment loss, if applicable.  The Update is effective for annual periods or any interim goodwill impairment tests beginning after December 15, 2019 using a prospective transition method and early adoption is permitted. The Company does not expect the Update will have a material impact on its Condensed Consolidated Financial Statements.

FASB ASU 2017-08, Receivables—Nonrefundable Fees and Other Costs (Subtopic 310-20): Premium Amortization on Purchased Callable Debt Securities was issued in March 2017 and changes the accounting for certain purchased callable debt securities held at a premium to shorten the amortization period for the premium to the earliest call date rather than to the maturity date. Accounting for purchased callable debt securities held at a discount does not change. The discount would continue to amortize to the maturity date. The Update is effective for reporting periods beginning after December 15, 2018, with early adoption permitted. The Company adopted this Update in January 2018. The adoption did not have a material impact on its Condensed Consolidated Financial Statements as the Company had been accounting for premiums as prescribed under this guidance.

FASB ASU 2017-09, Compensation—Stock Compensation (Topic 718): Scope of Modification Accounting was issued in May 2017 to provide clarity as to when to apply modification accounting when there is a change in the terms or conditions of a share-based payment award. According to this Update, an entity should account for the effects of a modification unless the fair value, vesting conditions and balance sheet classification of the award is the same after the modification as compared to the original award prior to the modification. The Update was effective for reporting periods beginning after December 15, 2017. The Company adopted the Update on January 1, 2018. The adoption did not have a material impact on its Condensed Consolidated Financial Statements because no share-based payment award was modified during the six months ended June 30, 2018. The Company will apply this Update prospectively for any subsequent modifications of share-based payment awards.

FASB ASU 2018-02, Income Statement - Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income was issued to address the income tax accounting treatment of the stranded tax effects within other comprehensive income due to the prohibition of backward tracing due to an income tax rate change that was initially recorded in other comprehensive income. This issue came about from the enactment of the Tax Cuts and Jobs Act on December 22, 2017 ("Tax Cuts and Jobs Act") that changed the Company’s income tax rate from 35% to 21%. The Update changed current accounting whereby an entity may elect to reclassify the stranded tax effect from accumulated other comprehensive income to retained earnings. The Update is effective for periods beginning after December 15, 2018 although early adoption is permitted. The Company early adopted ASU 2018-02 effective December 31, 2017 and elected a portfolio policy to reclassify the stranded tax effects of the change in the federal corporate tax rate of the net unrealized gains on our available-for-sale investment securities from accumulated other comprehensive loss, net to retained earnings.

FASB ASU 2018-05, Income Taxes (Topic 740): Amendments to SEC Paragraphs Pursuant to SEC Staff Accounting Bulletin No. 118 was issued to provide guidance on the income tax accounting implications of the Tax Cuts and Jobs Act, and allows for entities to report provisional amounts for specific income tax effects of the Tax Cuts and

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Jobs Act for which the accounting under ASC Topic 740 was not yet complete but a reasonable estimate could be determined. A measurement period of one-year is allowed to complete the accounting effects under ASC Topic 740 and revise any previous estimates reported. Any provisional amounts or subsequent adjustments included in an entity’s financial statements during the measurement period should be included in income from continuing operations as an adjustment to tax expense in the reporting period the amounts are determined. The Company adopted this Update with the provisional adjustments as reported in the Consolidated Financial Statements on Form 10-K as of December 31, 2017. As of June 30, 2018, the Company did not incur any adjustments to the provisional recognition.

(2) Business Combination

On July 26, 2017, the Company, along with the Bank, and Puget Sound Bancorp, Inc. and its wholly owned subsidiary bank, Puget Sound Bank, jointly announced the signing of a definitive agreement. The Puget Sound Merger was effective on January 16, 2018. As of the acquisition date, Puget Sound merged into Heritage and Puget Sound Bank merged into Heritage Bank. The primary reason for the transaction was to create depth in the Company's geographic footprint consistent with its ongoing growth strategy, focused heavily on metro markets, and to achieve operational scale and realize efficiencies of a larger combined organization.

Pursuant to the terms of the definitive agreement, all outstanding Puget Sound restricted stock awards became immediately vested prior to the Puget Sound Merger and Puget Sound shareholders received 1.1688 shares of Heritage common stock per share of Puget Sound stock. Heritage issued an aggregate of 4,112,258 shares of its common stock based on the January 12, 2018 closing price of Heritage Common stock of $31.80 for total fair value of common shares issued of $130.8 million and paid cash of $3,000 for fractional shares in the transaction for total consideration paid of $130.8 million. Total consideration includes $851,000 representing 26,741 shares which were forfeited by the Puget Sound shareholders to pay applicable taxes.

The Puget Sound Merger resulted in $68.5 million of goodwill. This goodwill is not deductible for tax purposes.

The Puget Sound Merger constitutes a business acquisition as defined by FASB ASC 805, Business Combinations. FASB ASC 805 establishes principles and requirements for how the acquirer of a business recognizes and measures in its financial statements the identifiable assets acquired and the liabilities assumed. Heritage was considered the acquirer in this transaction. Accordingly, the preliminary estimates of fair values of the Puget Sound assets, including the identifiable intangible assets, and the assumed liabilities in the Puget Sound Merger were measured and recorded as of January 16, 2018. Fair values on the acquisition date are preliminary and represent management’s best estimates based on available information and facts and circumstances in existence on the acquisition date. Fair values are subject to refinement for up to one year after the closing date of the acquisition as additional information regarding the closing date fair values becomes available. The Company expects to finalize the purchase price allocation by the third quarter of 2018 when the valuation of tax-related matters is complete.

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The preliminary fair value estimates of the assets acquired and liabilities assumed in the Puget Sound Merger were as follows:

	Puget Sound Merger
	(In thousands)
Assets
Cash and cash equivalents	$	25,889
Interest earning deposits	54,247
Investment securities available for sale	80,353
Loans receivable	388,462
Premises and equipment, net	732
Federal Home Loan Bank stock, at cost	623
Bank owned life insurance	6,264
Accrued interest receivable	1,448
Prepaid expenses and other assets	1,354
Other intangible assets	11,270
Total assets acquired	$	570,642
Liabilities
Deposits	$	505,885
Accrued expenses and other liabilities	2,504
Total liabilities acquired	$	508,389
Fair value of net assets acquired	$	62,253

A summary of the net assets purchased and the preliminary estimated fair value adjustments and resulting goodwill recognized from the Puget Sound Merger are presented in the following tables. Goodwill represents the excess of the consideration transferred over the estimated fair value of the net assets acquired and liabilities assumed.

	Puget Sound Merger
	(In thousands)
Cost basis of net assets on merger date	$	54,405
Consideration transferred	(130,773		)
Fair value adjustments:
Investment securities	(348		)
Total loans receivable, net	1,400
Premises and equipment	(121		)
Other intangible assets	9,207
Prepaid expenses and other assets	(2,282		)
Deposits	(62		)
Accrued expenses and other liabilities	54
Goodwill recognized from the Puget Sound Merger	$	(68,520	)

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The operating results of the Company for the three and six months ended June 30, 2018 include the operating results produced by the net assets acquired in the Puget Sound Merger since the January 16, 2018 merger date. The Company has considered the requirement of FASB ASC 805 related to the contribution of the Puget Sound Merger to the Company’s results of operations. The table below presents only the significant results for the acquired business since the January 16, 2018 merger date:

	Three Months Ended(1)			Six Months Ended(1)
	June 30, 2018
	(In thousands)
Interest income: Interest and fees on loans(2)	$	6,130		$	10,647
Interest income: Interest and fees on investments (3)	—			59
Interest income: Other interest earning assets	25			113
Interest expense	(180		)	(324		)
Provision for loan losses for loans	(350		)	(550		)
Noninterest income	109			257
Noninterest expense (4)	(2,092		)	(7,672		)
Net effect, pre-tax	$	3,642		$	2,530

⁽¹⁾ The Puget Sound Merger was completed on January 16, 2018.

⁽²⁾ Includes the accretion of the discount on the purchased loans of $1.1 million and $1.5 million during the three and six months ended June 30, 2018, respectively.

⁽³⁾ All securities were sold with trade date of January 16, 2018 and settlement dates on or before February 14, 2018.

⁽⁴⁾ Excludes certain compensation and employee benefits for management as it is impracticable to determine due to the integration of the operations for this merger. Also includes certain merger-related costs incurred by the Company.

The Company also considered the pro forma requirements of FASB ASC 805 and deemed it not necessary to provide pro forma financial statements as required under the standard as the Puget Sound Merger is not material to the Company. The Company believes that the historical Puget Sound operating results are not considered of enough significance to be meaningful to the Company’s results of operations.

During the three and six months ended June 30, 2018, the Company incurred acquisition-related costs of approximately $551,000 and $5.0 million, respectively, related to the Puget Sound Merger.

(3) Investment Securities

As a result of the adoption of ASU 2016-01 on January 1, 2018, equity investments (except for investments accounted for under the equity method of accounting) are now measured at fair value, with changes in fair value recognized in earnings. These investments were previously measured at fair value, with changes in fair value recognized in accumulated other comprehensive loss. Accordingly, these securities are no longer classified as investment securities available-for-sale and their presentation is not comparable to the presentation as of December 31, 2017. See Note (1) Description of Business, Basis of Presentation, Significant Accounting Policies and Recently Issued Accounting Pronouncements, as well as Equity Securities section discussed below.

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Available for sale investment securities

(a) Securities by Type and Maturity

The amortized cost, gross unrealized gains, gross unrealized losses and fair values of investment securities available for sale at the dates indicated were as follows:

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
	(In thousands)
June 30, 2018
U.S. Treasury and U.S. Government-sponsored agencies	$	52,256	$	42	$	(234	)	$	52,064
Municipal securities	202,918		1,366		(1,262		)	203,022
Mortgage-backed securities and collateralized mortgage obligations(1):
Residential	319,492		352		(7,722		)	312,122
Commercial	257,858		141		(7,778		)	250,221
Collateralized loan obligations	2,253		3		—			2,256
Corporate obligations	25,617		153		(80		)	25,690
Other asset-backed securities	27,603		692		—			28,295
Total	$	887,997	$	2,749	$	(17,076	)	$	873,670
December 31, 2017
U.S. Treasury and U.S. Government-sponsored agencies	$	13,460	$	6	$	(24	)	$	13,442
Municipal securities	247,358		3,720		(1,063		)	250,015
Mortgage-backed securities and collateralized mortgage obligations(1):
Residential	282,724		422		(2,935		)	280,211
Commercial	219,696		444		(3,061		)	217,079
Collateralized loan obligations	4,561		19		—			4,580
Corporate obligations	16,594		220		(44		)	16,770
Other securities (2)	27,781		652		—			28,433
Total	$	812,174	$	5,483	$	(7,127	)	$	810,530

⁽¹⁾  Issued and guaranteed by U.S. Government-sponsored agencies.

⁽²⁾  Primarily asset-backed securities.

There were no securities classified as trading or held to maturity at June 30, 2018 or December 31, 2017.

The amortized cost and fair value of investment securities available for sale at June 30, 2018, by contractual maturity, are set forth below. Actual maturities may differ from contractual maturities because certain borrowers have the right to call or prepay obligations with or without call or prepayment penalties.

	Amortized Cost		Fair Value
	(In thousands)
Due in one year or less	$	24,656	$	24,690
Due after one year through five years	149,590		148,197
Due after five years through ten years	254,873		248,759
Due after ten years	458,878		452,024
Total	$	887,997	$	873,670

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(b) Unrealized Losses and Other-Than-Temporary Impairments

The following table shows the gross unrealized losses and fair value of the Company's investment securities available for sale that are not deemed to be other-than-temporarily impaired, aggregated by investment category and length of time that the individual securities have been in continuous unrealized loss positions as of June 30, 2018 and December 31, 2017:

	Less than 12 Months					12 Months or Longer					Total
	Fair Value		Unrealized Losses			Fair Value		Unrealized Losses			Fair Value		Unrealized Losses
	(In thousands)
June 30, 2018
U.S. Treasury and U.S. Government-sponsored agencies	$	34,674	$	(223	)	$	536	$	(11	)	$	35,210	$	(234	)
Municipal securities	63,443		(552		)	22,903		(710		)	86,346		(1,262		)
Mortgage-backed securities and collateralized mortgage obligations(1):
Residential	178,865		(3,954		)	78,330		(3,768		)	257,195		(7,722		)
Commercial	128,298		(3,058		)	94,847		(4,720		)	223,145		(7,778		)
Corporate obligations	15,482		(80		)	—		—			15,482		(80		)
Total	$	420,762	$	(7,867	)	$	196,616	$	(9,209	)	$	617,378	$	(17,076	)
December 31, 2017
U.S. Treasury and U.S. Government-sponsored agencies	$	11,436	$	(24	)	$	—	$	—		$	11,436	$	(24	)
Municipal securities	39,298		(384		)	26,509		(679		)	65,807		(1,063		)
Mortgage-backed securities and collateralized mortgage obligations(1):
Residential	175,847		(1,296		)	66,380		(1,639		)	242,227		(2,935		)
Commercial	75,121		(700		)	90,822		(2,361		)	165,943		(3,061		)
Corporate obligations	3,472		(44		)	—		—			3,472		(44		)
Total	$	305,174	$	(2,448	)	$	183,711	$	(4,679	)	$	488,885	$	(7,127	)

⁽¹⁾ Issued and guaranteed by U.S. Government-sponsored agencies.

The Company has evaluated these investment securities available for sale as of June 30, 2018 and December 31, 2017 and has determined that the decline in their value is not other-than-temporary. The unrealized losses are primarily due to increases in market interest rates. The fair value of these securities is expected to recover as the securities approach their maturity date. None of the underlying issuers of the municipal securities and corporate obligations had credit ratings that were below investment grade levels at June 30, 2018 or December 31, 2017. The Company has the ability and intent to hold the investments until recovery of the securities' amortized cost, which may be the maturity date of the securities.

For the three and six months ended June 30, 2018 and 2017, there were no other-than-temporary charges recorded to net income.

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(c) Realized Gains and Losses

The following table presents the gross realized gains and losses on the sale of securities available for sale for the three and six months ended June 30, 2018 and 2017.

	Three Months Ended June 30,				Six Months Ended June 30,
	2018		2017		2018			2017
	(In thousands)
Gross realized gains	$	18	$	117	$	122		$	117
Gross realized losses	—		—		(69		)	—
Net realized gains	$	18	$	117	$	53		$	117

(d) Pledged Securities

The following table summarizes the amortized cost and fair value of investment securities available for sale that are pledged as collateral for the following obligations at June 30, 2018 and December 31, 2017:

	June 30, 2018				December 31, 2017
	Amortized Cost		Fair Value		Amortized Cost		Fair Value
	(In thousands)
Washington and Oregon state to secure public deposits	$	197,047	$	193,946	$	206,377	$	206,425
Repurchase agreements	45,463		44,207		48,750		48,237
Other securities pledged	20,048		19,742		12,484		12,498
Total	$	262,558	$	257,895	$	267,611	$	267,160

Equity Securities

The Company holds an equity security with a readily determinable fair value of $162,000 and $146,000 as of June 30, 2018 and December 31, 2017, respectively. As a result of the adoption of ASU 2016-01, this security is no longer classified as investment security available for sale and has been reclassified to prepaid expenses and other assets on the Company's Condensed Consolidated Statements of Financial Condition as of June 30, 2018. As such, its presentation is not comparable to the presentation as of December 31, 2017. The Company recorded the tax-effected unrealized gain on the equity security through an adjustment to accumulated other comprehensive loss, net and retained earnings in the Condensed Consolidated Statement of Stockholders' Equity during the six months ended June 30, 2018.

(4) Loans Receivable

The Company originates loans in the ordinary course of business and has also acquired loans through FDIC-assisted and open bank transactions. Disclosures related to the Company's recorded investment in loans receivable generally exclude accrued interest receivable and net deferred fees or costs because they are insignificant.

Loans acquired in a business combination are further classified as “purchased” loans. Loans purchased with evidence of credit deterioration since origination for which it is probable that not all contractually required payments will be collected are accounted for under FASB ASC 310-30, Loans and Debt Securities Acquired with Deteriorated Credit Quality. These loans are identified as "PCI" loans. Loans purchased that are not accounted for under FASB ASC 310-30 are accounted for under FASB ASC 310-20, Receivables—Nonrefundable Fees and Other Costs, and are referred to as "non-PCI" loans.

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(a) Loan Origination/Risk Management

The Company categorizes loans in one of the four segments of the total loan portfolio: commercial business, one-to-four family residential, real estate construction and land development and consumer. Within these segments are classes of loans for which management monitors and assesses credit risk in the loan portfolios. The Company has certain lending policies and procedures in place that are designed to maximize loan income within an acceptable level of risk. Management reviews and approves these policies and procedures on a regular basis. A reporting system supplements the review process by providing management with frequent reports related to loan production, loan quality, concentrations of credit, loan delinquencies and nonperforming and criticized loans. The Company also conducts internal loan reviews and validates the credit risk assessment on a periodic basis and presents the results of these reviews to management. The loan review process complements and reinforces the risk identification and assessment decisions made by loan officers and credit personnel, as well as the Company’s policies and procedures.

A discussion of the risk characteristics of each loan portfolio segment is as follows:

Commercial Business:

There are three significant classes of loans in the commercial business portfolio segment: commercial and industrial, owner-occupied commercial real estate and non-owner occupied commercial real estate. The owner and non-owner occupied commercial real estate classes are both considered commercial real estate loans. As the commercial and industrial loans carry different risk characteristics than the commercial real estate loans, they are discussed separately below.

Commercial and industrial. Commercial and industrial loans are primarily made based on the identified cash flows of the borrower and secondarily on the underlying collateral provided by the borrower. The cash flows of borrowers, however, may not be as expected and the collateral securing these loans may fluctuate in value. Most commercial and industrial loans are secured by the assets being financed or other business assets such as accounts receivable or inventory and may include a personal guarantee; however, some short-term loans may be made on an unsecured basis. In the case of loans secured by accounts receivable, the availability of funds for the repayment of these loans may be substantially dependent on the ability of the borrower to collect amounts due from its customers. Commercial and industrial loans carry more risk than other loans because the borrowers’ cash flow is less predictable, and in the event of a default, the amount of loss is potentially greater and more difficult to quantify because the value of the collateral securing these loans may fluctuate, may be uncollectible, or may be obsolete or of limited use, among other things.

Commercial real estate. The Company originates commercial real estate loans primarily within its primary market areas. These loans are subject to underwriting standards and processes similar to commercial and industrial loans in that these loans are viewed primarily as cash flow loans and secondarily as loans secured by real estate properties. Commercial real estate lending typically involves higher loan principal amounts and payments on loans, and repayment is dependent on successful operation and management of the properties. The value of the real estate securing these loans can be adversely affected by conditions in the real estate market or the economy. There is little difference in risk between owner-occupied commercial real estate loans and non-owner occupied commercial real estate loans.

One-to-Four Family Residential:

The majority of the Company’s one-to-four family residential loans are secured by single-family residences located in its primary market areas. The Company’s underwriting standards require that single-family portfolio loans generally are owner-occupied and do not exceed 80% of the lower of appraised value at origination or cost of the underlying collateral. Terms of maturity typically range from 15 to 30 years. The Company sells most of its single-family loans in the secondary market and retains a smaller portion in its loan portfolio.

Real Estate Construction and Land Development:

The Company originates construction loans for one-to-four family residential and for five or more family residential and commercial properties. The one-to-four family residential construction loans generally include construction of custom homes whereby the home buyer is the borrower. The Company also provides financing to builders for the construction of pre-sold homes and, in selected cases, to builders for the construction of speculative residential property. Substantially all construction loans are short-term in nature and priced with variable rates of interest. Construction lending can involve a higher level of risk than other types of lending because funds are advanced partially based upon the value of the project, which is uncertain prior to the project’s completion. Because of the uncertainties inherent in estimating construction costs as well as the market value of a completed project and the effects of governmental regulation of real property, the Company’s estimates with regard to the total funds required to complete a project and the related loan-to-value ratio may vary from actual results. As a result, construction loans often

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involve the disbursement of substantial funds with repayment dependent, in part, on the success of the ultimate project and the ability of the borrower to sell or lease the property or refinance the indebtedness. If the Company’s estimate of the value of a project at completion proves to be overstated, it may have inadequate security for repayment of the loan and may incur a loss if the borrower does not repay the loan. Sources of repayment for these types of loans may be pre-committed permanent loans from approved long-term lenders, sales of developed property or an interim loan commitment from the Company until permanent financing is obtained. These loans are closely monitored by on-site inspections and are considered to have higher risks than other real estate loans due to their ultimate repayment being dependent upon successful completion of the construction project, interest rate changes, government regulation of real property, general economic conditions and the availability of long-term financing.

Consumer:

The Company originates consumer loans and lines of credit that are both secured and unsecured. The underwriting process for these loans ensures a qualifying primary and secondary source of repayment. Underwriting standards for home equity loans are significantly influenced by statutory requirements, which include, but are not limited to, a maximum loan-to-value percentage of 80%, collection remedies, the number of such loans a borrower can have at one time and documentation requirements. To monitor and manage consumer loan risk, policies and procedures are developed and modified, as needed. The majority of consumer loans are for relatively small amounts disbursed among many individual borrowers which reduces the credit risk for this type of loan. To further reduce the risk, trend reports are reviewed by management on a regular basis.

The Company also originates indirect consumer loans. These loans are for new and used automobile and recreational vehicles that are originated indirectly by selected dealers located in the Company's market areas. The Company has limited its purchase of indirect loans primarily to dealerships that are established and well-known in their market areas and to applicants that are not classified as sub-prime.

Loans receivable at June 30, 2018 and December 31, 2017 consisted of the following portfolio segments and classes:

	June 30, 2018			December 31, 2017
	(In thousands)
Commercial business:
Commercial and industrial	$	800,043		$	645,396
Owner-occupied commercial real estate	693,330			622,150
Non-owner occupied commercial real estate	1,187,548			986,594
Total commercial business	2,680,921			2,254,140
One-to-four family residential	92,518			86,997
Real estate construction and land development:
One-to-four family residential	71,934			51,985
Five or more family residential and commercial properties	93,315			97,499
Total real estate construction and land development	165,249			149,484
Consumer	385,987			355,091
Gross loans receivable	3,324,675			2,845,712
Net deferred loan costs	3,613			3,359
Loans receivable, net	3,328,288			2,849,071
Allowance for loan losses	(33,972		)	(32,086		)
Total loans receivable, net	$	3,294,316		$	2,816,985

(b) Concentrations of Credit

Most of the Company’s lending activity occurs within its primary market areas which are concentrated along the I-5 corridor from Whatcom County to Clark County in Washington State and Multnomah County in Oregon, as well as other contiguous markets. The majority of the Company’s loan portfolio consists of (in order of balances at June 30, 2018) non-owner occupied commercial real estate, commercial and industrial and owner-occupied commercial real estate. As of June 30, 2018 and December 31, 2017, there were no concentrations of loans related to any single industry in excess of 10% of the Company’s total loans.

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(c) Credit Quality Indicators

As part of the on-going monitoring of the credit quality of the Company’s loan portfolio, management tracks certain credit quality indicators including trends related to (i) the risk grade of the loans, (ii) the level of classified loans, (iii) net charge-offs, (iv) nonperforming loans and (v) the general economic conditions of the United States of America, and specifically the states of Washington and Oregon. The Company utilizes a risk grading matrix to assign a risk grade to each of its loans. Loans are graded on a scale of 1 to 10. A description of the general characteristics of the risk grades is as follows:

• Grades 1 to 5: These grades are considered “pass grade” and include loans with negligible to above average but acceptable risk. These borrowers generally have strong to acceptable capital levels and consistent earnings and debt service capacity. Loans with the higher grades within the “pass” category may include borrowers who are experiencing unusual operating difficulties, but have acceptable payment performance to date. Increased monitoring of financial information and/or collateral may be appropriate. Loans with this grade show no immediate loss exposure.

• Grade 6: This grade includes "Watch" loans and is considered a “pass grade”. The grade is intended to be utilized on a temporary basis for pass grade borrowers where a potentially significant risk-modifying action is anticipated in the near term.

• Grade 7: This grade includes “Other Assets Especially Mentioned” (“OAEM”) loans in accordance with regulatory guidelines and is intended to highlight loans with elevated risks. Loans with this grade show signs of deteriorating profits and capital, and the borrower might not be strong enough to sustain a major setback. The borrower is typically higher than normally leveraged, and outside support might be modest and likely illiquid. The loan is at risk of further decline unless active measures are taken to correct the situation.

• Grade 8: This grade includes “Substandard” loans in accordance with regulatory guidelines, which the Company has determined have a high credit risk. These loans also have well-defined weaknesses which make payment default or principal exposure likely, but not yet certain. The borrower may have shown serious negative trends in financial ratios and performance. Such loans may be dependent upon collateral liquidation, a secondary source of repayment or an event outside of the normal course of business. Loans with this grade can be placed on accrual or nonaccrual status based on the Company’s accrual policy.

• Grade 9: This grade includes “Doubtful” loans in accordance with regulatory guidelines, and the Company has determined these loans to have excessive credit risk. Such loans are placed on nonaccrual status and may be dependent upon collateral having a value that is difficult to determine or upon some near-term event which lacks certainty. Additionally, these loans generally have a specific valuation allowance or have been partially charged-off for the amount considered uncollectible.

• Grade 10: This grade includes “Loss” loans in accordance with regulatory guidelines, and the Company has determined these loans have the highest risk of loss. Such loans are charged-off or charged-down when payment is acknowledged to be uncertain or when the timing or value of payments cannot be determined. “Loss” is not intended to imply that the loan or some portion of it will never be paid, nor does it in any way imply that there has been a forgiveness of debt.

Numerical loan grades for loans are established at the origination of the loan. Loan grades are reviewed on a quarterly basis, or more frequently if necessary, by the credit department. The Bank follows the FDIC’s Uniform Retail Credit Classification and Account Management Policy for subsequent classification in the event of payment delinquencies or default. Typically, an individual loan grade will not be changed from the prior period unless there is a specific indication of credit deterioration or improvement. Credit deterioration is evidenced by delinquency, direct communications with the borrower, or other borrower information that becomes known to management. Credit improvements are evidenced by known facts regarding the borrower or the collateral property.

The loan grades relate to the likelihood of losses in that the higher the grade, the greater the loss potential. Loans with a pass grade may have some estimated inherent losses, but to a lesser extent than the other loan grades. The OAEM loan grade is transitory in that the Company is waiting on additional information to determine the likelihood and extent of the potential loss. The likelihood of loss for OAEM graded loans, however, is greater than Watch graded loans because there has been measurable credit deterioration. Loans with a Substandard grade are generally loans for which the Company has individually analyzed for potential impairment. For Doubtful and Loss graded loans, the Company is almost certain of the losses, and the outstanding principal balances are generally charged-off to the realizable value.

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The following tables present the balance of the loans receivable by credit quality indicator as of June 30, 2018 and December 31, 2017.

	June 30, 2018
	Pass		OAEM		Substandard		Doubtful/Loss		Total
	(In thousands)
Commercial business:
Commercial and industrial	$	731,265	$	23,559	$	45,219	$	—	$	800,043
Owner-occupied commercial real estate	656,991		16,402		19,937		—		693,330
Non-owner occupied commercial real estate	1,161,596		10,972		14,980		—		1,187,548
Total commercial business	2,549,852		50,933		80,136		—		2,680,921
One-to-four family residential	91,264		—		1,254		—		92,518
Real estate construction and land development:
One-to-four family residential	70,499		267		1,168		—		71,934
Five or more family residential and commercial properties	93,258		57		—		—		93,315
Total real estate construction and land development	163,757		324		1,168		—		165,249
Consumer	381,341		—		4,121		525		385,987
Gross loans receivable	$	3,186,214	$	51,257	$	86,679	$	525	$	3,324,675

	December 31, 2017
	Pass		OAEM		Substandard		Doubtful/Loss		Total
	(In thousands)
Commercial business:
Commercial and industrial	$	597,697	$	19,536	$	28,163	$	—	$	645,396
Owner-occupied commercial real estate	595,455		12,668		14,027		—		622,150
Non-owner occupied commercial real estate	955,450		10,494		20,650		—		986,594
Total commercial business	2,148,602		42,698		62,840		—		2,254,140
One-to-four family residential	85,762		—		1,235		—		86,997
Real estate construction and land development:
One-to-four family residential	49,925		537		1,523		—		51,985
Five or more family residential and commercial properties	96,404		707		388		—		97,499
Total real estate construction and land development	146,329		1,244		1,911		—		149,484
Consumer	349,590		—		4,976		525		355,091
Gross loans receivable	$	2,730,283	$	43,942	$	70,962	$	525	$	2,845,712

Potential problem loans are loans classified as OAEM or worse that are currently accruing interest and are not considered impaired, but which management is monitoring because the financial information of the borrower causes concern as to their ability to meet their loan repayment terms. Potential problem loans may include PCI loans as these loans continue to accrete loan discounts established at acquisition based on the guidance of FASB ASC 310-30. Potential problem loans as of June 30, 2018 and December 31, 2017 were $101.5 million and $83.5 million, respectively.

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(d) Nonaccrual Loans

Nonaccrual loans, segregated by segments and classes of loans, were as follows as of June 30, 2018 and December 31, 2017:

	June 30, 2018		December 31, 2017
	(In thousands)
Commercial business:
Commercial and industrial	$	8,376	$	3,110
Owner-occupied commercial real estate	4,690		4,090
Non-owner occupied commercial real estate	2,169		1,898
Total commercial business	15,235		9,098
One-to-four family residential	77		81
Real estate construction and land development:
One-to-four family residential	1,084		1,247
Consumer	127		277
Nonaccrual loans	$	16,523	$	10,703

PCI loans are not included in the nonaccrual loan table above because these loans are accounted for under FASB ASC 310-30, which provides that accretable yield is calculated based on a loan's expected cash flow even if the loan is not performing under its contractual terms.

(e) Past due loans

The Company performs an aging analysis of past due loans using the categories of 30-89 days past due and 90 or more days past due. This policy is consistent with regulatory reporting requirements.

The balances of past due loans, segregated by segments and classes of loans, as of June 30, 2018 and December 31, 2017 were as follows:

	June 30, 2018
	30-89 Days		90 Days or Greater		Total Past  Due		Current		Total
	(In thousands)
Commercial business:
Commercial and industrial	$	3,719	$	4,122	$	7,841	$	792,202	$	800,043
Owner-occupied commercial real estate	129		868		997		692,333		693,330
Non-owner occupied commercial real estate	1,501		3,238		4,739		1,182,809		1,187,548
Total commercial business	5,349		8,228		13,577		2,667,344		2,680,921
One-to-four family residential	—		—		—		92,518		92,518
Real estate construction and land development:
One-to-four family residential	—		309		309		71,625		71,934
Five or more family residential and commercial properties	—		—		—		93,315		93,315
Total real estate construction and land development	—		309		309		164,940		165,249
Consumer	1,634		53		1,687		384,300		385,987
Gross loans receivable	$	6,983	$	8,590	$	15,573	$	3,309,102	$	3,324,675

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	December 31, 2017
	30-89 Days		90 Days or Greater		Total Past  Due		Current		Total
	(In thousands)
Commercial business:
Commercial and industrial	$	2,993	$	1,172	$	4,165	$	641,231	$	645,396
Owner-occupied commercial real estate	1,277		1,225		2,502		619,648		622,150
Non-owner occupied commercial real estate	870		3,314		4,184		982,410		986,594
Total commercial business	5,140		5,711		10,851		2,243,289		2,254,140
One-to-four family residential	513		—		513		86,484		86,997
Real estate construction and land development:
One-to-four family residential	84		1,331		1,415		50,570		51,985
Five or more family residential and commercial properties	40		—		40		97,459		97,499
Total real estate construction and land development	124		1,331		1,455		148,029		149,484
Consumer	1,939		687		2,626		352,465		355,091
Gross loans receivable	$	7,716	$	7,729	$	15,445	$	2,830,267	$	2,845,712

There were no loans 90 days or more past due that were still accruing interest as of June 30, 2018 or December 31, 2017, excluding PCI loans.

(f) Impaired loans

Impaired loans include nonaccrual loans and performing troubled debt restructured ("TDR") loans. The balances of impaired loans as of June 30, 2018 and December 31, 2017 are set forth in the following tables.

	June 30, 2018
	Recorded Investment With No Specific Valuation Allowance		Recorded Investment With Specific Valuation Allowance		Total Recorded Investment		Unpaid Contractual Principal Balance		Related Specific Valuation Allowance
	(In thousands)
Commercial business:
Commercial and industrial	$	5,716	$	12,238	$	17,954	$	18,825	$	1,706
Owner-occupied commercial real estate	930		11,254		12,184		12,493		1,724
Non-owner occupied commercial real estate	4,662		5,923		10,585		10,558		784
Total commercial business	11,308		29,415		40,723		41,876		4,214
One-to-four family residential	—		291		291		301		90
Real estate construction and land development:
One-to-four family residential	775		309		1,084		1,842		5
Total real estate construction and land development	775		309		1,084		1,842		5
Consumer	53		329		382		447		74
Total	$	12,136	$	30,344	$	42,480	$	44,466	$	4,383

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	December 31, 2017
	Recorded Investment With No Specific Valuation Allowance		Recorded Investment With Specific Valuation Allowance		Total Recorded Investment		Unpaid Contractual Principal Balance		Related Specific Valuation Allowance
	(In thousands)
Commercial business:
Commercial and industrial	$	2,127	$	9,872	$	11,999	$	12,489	$	1,326
Owner-occupied commercial real estate	2,452		4,356		6,808		7,054		621
Non-owner occupied commercial real estate	4,722		11,297		16,019		16,172		1,222
Total commercial business	9,301		25,525		34,826		35,715		3,169
One-to-four family residential	—		299		299		308		93
Real estate construction and land development:
One-to-four family residential	938		309		1,247		2,200		2
Five or more family residential and commercial properties	—		645		645		645		37
Total real estate construction and land development	938		954		1,892		2,845		39
Consumer	160		282		442		466		54
Total	$	10,399	$	27,060	$	37,459	$	39,334	$	3,355

The average recorded investment of impaired loans for the three and six months ended June 30, 2018 and 2017 are set forth in the following table.

	Three Months Ended June 30,				Six Months Ended June 30,
	2018		2017		2018		2017
	(In thousands)
Commercial business:
Commercial and industrial	$	17,299	$	6,925	$	15,534	$	8,742
Owner-occupied commercial real estate	12,643		3,278		12,622		3,760
Non-owner occupied commercial real estate	10,426		11,252		10,366		11,274
Total commercial business	40,368		21,455		38,522		23,776
One-to-four family residential	293		312		295		315
Real estate construction and land development:
One-to-four family residential	1,116		2,636		1,159		2,781
Five or more family residential and commercial properties	—		1,067		215		1,070
Total real estate construction and land development	1,116		3,703		1,374		3,851
Consumer	381		235		401		260
Total	$	42,158	$	25,705	$	40,592	$	28,202

For the three and six months ended June 30, 2018 and 2017, no interest income was recognized subsequent to a loan’s classification as nonaccrual. For the three and six months ended June 30, 2018, the Bank recorded $360,000 and $686,000, respectively, of interest income related to performing TDR loans. For the three and six months ended June 30, 2017, the Bank recorded $281,000 and $646,000, respectively, of interest income related to performing TDR loans.

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(g) Troubled Debt Restructured Loans

A TDR loan is a restructuring in which the Bank, for economic or legal reasons related to a borrower’s financial difficulties, grants a concession to the borrower that it would not otherwise consider. TDR loans are considered impaired and are separately measured for impairment under FASB ASC 310-10-35, whether on accrual ("performing") or nonaccrual ("nonperforming") status. The Company has more stringent definitions of concessions and impairment measures for PCI loans as these loans have known credit deterioration and are generally accreting income at a lower discounted rate as compared to the contractual note rate based on the guidance of FASB ASC 310-30.

The majority of the Bank’s TDR loans are a result of granting extensions of maturity on troubled credits which have already been adversely classified. The Bank grants such extensions to reassess the borrower’s financial status and to develop a plan for repayment. The second most prevalent concessions are certain modifications with extensions that also include interest rate reductions. Certain TDR loans were additionally re-amortized over a longer period of time. These modifications would all be considered a concession for a borrower that could not obtain similar financing terms from another source other than from the Bank.

The financial effects of each modification will vary based on the specific restructure. For the majority of the Bank’s TDR loans, the loans were interest-only with a balloon payment at maturity. If the interest rate is not adjusted and the modified terms are consistent with other similar credits being offered, the Bank may not experience any loss associated with the restructure. If, however, the restructure involves forbearance agreements or interest rate modifications, the Bank may not collect all the principal and interest based on the original contractual terms. The Bank estimates the necessary allowance for loan losses on TDR loans using the same guidance as used for other impaired loans.

The recorded investment balance and related allowance for loan losses of performing and nonaccrual TDR loans as of June 30, 2018 and December 31, 2017 were as follows:

	June 30, 2018				December 31, 2017
	Performing TDRs		Nonaccrual TDRs		Performing TDRs		Nonaccrual TDRs
	(In thousands)
TDR loans	$	25,957	$	6,761	$	26,757	$	5,193
Allowance for loan losses on TDR loans	2,492		726		2,635		379

The unfunded commitment to borrowers related to TDR loans was $1.0 million and $1.2 million at June 30, 2018 and December 31, 2017, respectively.

Loans that were modified as TDR loans during the three and six months ended June 30, 2018 and 2017 are set forth in the following table:

	Three Months Ended June 30,
	2018			2017
	Number of Contracts (1)	Outstanding Principal Balance  (1)(2)		Number of Contracts (1)	Outstanding Principal Balance  (1)(2)
	(Dollars in thousands)
Commercial business:
Commercial and industrial	9	$	2,981	5	$	3,439
Owner-occupied commercial real estate	1	570		—	—
Non-owner occupied commercial real estate	—	—		1	947
Total commercial business	10	3,551		6	4,386
Real estate construction and land development:
One-to-four family residential	—	—		2	745
Total real estate construction and land development	—	—		2	745
Consumer	3	33		1	10
Total loans modified as TDR loans	13	$	3,584	9	$	5,141

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	Six Months Ended June 30,
	2018			2017
	Number of Contracts (1)	Outstanding Principal Balance  (1)(2)		Number of Contracts (1)	Outstanding Principal Balance  (1)(2)
	(Dollars in thousands)
Commercial business:
Commercial and industrial	17	$	6,193	10	$	4,913
Owner-occupied commercial real estate	1	570		1	54
Non-owner occupied commercial real estate	2	2,380		1	948
Total commercial business	20	9,143		12	5,915
Real estate construction and land development:
One-to-four family residential	—	—		4	1,889
Total real estate construction and land development	—	—		4	1,889
Consumer	6	107		2	18
Total TDR loans	26	$	9,250	18	$	7,822

⁽¹⁾  Number of contracts and outstanding principal balance represent loans which have balances as of period end as certain loans may have been paid-down or charged-off during the three and six months ended June 30, 2018 and 2017.

⁽²⁾  Includes subsequent payments after modifications and reflects the balance as of period end. As the Bank did not forgive any principal or interest balance as part of the loan modification, the Bank’s recorded investment in each loan at the date of modification (pre-modification) did not change as a result of the modification (post-modification), except when the modification was the initial advance on a one-to-four family residential real estate construction and land development loan under a master guidance line. There were no advances on these types of loans during the three and six months ended June 30, 2018 and 2017.

Certain loans included in the table above may have been previously reported as TDR loans. The Bank typically grants shorter extension periods to continually monitor these TDR loans despite the fact that the extended date might not be the date the Bank expects sufficient cash flow from these borrowers. The Bank does not consider these modifications a subsequent default of a TDR as new loan terms, specifically new maturity dates, were granted. The potential losses related to these loans would have been considered in the period the loan was first reported as a TDR loan and are adjusted, as necessary, in the current period based on more recent information. The related specific valuation allowance at June 30, 2018 was $738,000 for loans that were modified as TDR loans during the three and six months ended June 30, 2018.

Loans that were modified during the previous twelve months that subsequently defaulted during the three and six months ended June 30, 2018 and 2017 are set forth in the following table:

	Three Months Ended June 30,
	2018			2017
	Number of Contracts	Outstanding Principal  Balance		Number of Contracts	Outstanding Principal  Balance
	(Dollars in thousands)
Commercial business:
Commercial and industrial	4	$	2,725	—	$	—
Total commercial business	4	2,725		—	—
Consumer	—	—		3	36
Total	4	$	2,725	3	$	36

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	Six Months Ended June 30,
	2018			2017
	Number of Contracts	Outstanding Principal  Balance		Number of Contracts	Outstanding Principal  Balance
	(Dollars in thousands)
Commercial business:
Commercial and industrial	5	$	3,006	1	$	234
Non-owner occupied commercial real estate	1	73		—	—
Total commercial business	6	3,079		1	234
Real estate construction and land development:
One-to-four family residential	2	775		—	—
Total real estate construction and land development	2	775		—	—
Consumer	—	—		3	36
Total	8	$	3,854	4	$	270

During the three and six months ended June 30, 2018, two loans and six loans, respectively, defaulted because they were past their modified maturity dates, and the borrowers have not subsequently repaid the credits. The Bank has chosen not to extend the maturities on these loans. In addition, during the three and six months ended June 30, 2018, two loans and two loans, respectively, defaulted because the borrowers were more than 90 days delinquent on their scheduled loan payments. The Bank had no specific valuation allowance at June 30, 2018 related to the credits which defaulted during the six months ended June 30, 2018.     

During the three and six months ended June 30, 2017, three loans and four loans, respectively, defaulted because the borrowers were more than 90 days delinquent on their scheduled loan payments.

(h) Purchased Credit Impaired Loans

The Company acquired certain loans and designated them, as appropriate, as PCI loans, which are accounted for under FASB ASC 310-30. No loans acquired in the Puget Sound Merger effective January 16, 2018 were considered PCI.

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The following table reflects the outstanding principal balance and recorded investment of the PCI loans at June 30, 2018 and December 31, 2017:

	June 30, 2018				December 31, 2017
	Outstanding Principal		Recorded Investment		Outstanding Principal		Recorded Investment
	(In thousands)
Commercial business:
Commercial and industrial	$	7,307	$	3,819	$	8,818	$	2,912
Owner-occupied commercial real estate	9,737		8,605		12,230		11,515
Non-owner occupied commercial real estate	12,545		11,033		14,295		13,342
Total commercial business	29,589		23,457		35,343		27,769
One-to-four family residential	3,701		3,833		4,120		5,255
Real estate construction and land development:
One-to-four family residential	107		391		841		89
Five or more family residential and commercial properties	193		11		2,361		2,035
Total real estate construction and land development	300		402		3,202		2,124
Consumer	2,932		4,160		3,974		5,455
Gross PCI loans	$	36,522	$	31,852	$	46,639	$	40,603

On the acquisition dates, the amount by which the undiscounted expected cash flows of the PCI loans exceeded the estimated fair value of the loan is the “accretable yield.” The accretable yield is then measured at each financial reporting date and represents the difference between the remaining undiscounted expected cash flows and the current carrying value of the PCI loans.

The following table summarizes the accretable yield on the PCI loans for the three and six months ended June 30, 2018 and 2017.

	Three Months Ended June 30,						Six Months Ended June 30,
	2018			2017			2018			2017
	(In thousands)
Balance at the beginning of the period	$	11,269		$	13,132		$	11,224		$	13,860
Accretion	(587		)	(935		)	(1,368		)	(1,929		)
Disposal and other	(273		)	(653		)	(1,971		)	(1,143		)
Change in accretable yield	(349		)	752			2,175			1,508
Balance at the end of the period	$	10,060		$	12,296		$	10,060		$	12,296

30

(5) Allowance for Loan Losses

The allowance for loan losses is maintained at a level deemed appropriate by management to provide for probable incurred credit losses in the loan portfolio. The following tables detail the activity in the allowance for loan losses disaggregated by segment and class for the three and six months ended June 30, 2018:

	Balance at Beginning of Period		Charge-offs			Recoveries		Provision for Loan Losses			Balance at End of Period
	(In thousands)
Three Months Ended June 30, 2018
Commercial business:
Commercial and industrial	$	9,943	$	(541	)	$	65	$	721		$	10,188
Owner-occupied commercial real estate	5,040		(1		)	3		204			5,246
Non-owner occupied commercial real estate	7,589		—			—		137			7,726
Total commercial business	22,572		(542		)	68		1,062			23,160
One-to-four family residential	1,083		(15		)	—		53			1,121
Real estate construction and land development:
One-to-four family residential	941		—			2		73			1,016
Five or more family residential and commercial properties	1,115		—			—		(71		)	1,044
Total real estate construction and land development	2,056		—			2		2			2,060
Consumer	6,054		(694		)	142		803			6,305
Unallocated	1,496		—			—		(170		)	1,326
Total	$	33,261	$	(1,251	)	$	212	$	1,750		$	33,972
Six Months Ended June 30, 2018
Commercial business:
Commercial and industrial	$	9,910	$	(622	)	$	564	$	336		$	10,188
Owner-occupied commercial real estate	3,992		(1		)	5		1,250			5,246
Non-owner occupied commercial real estate	8,097		—			—		(371		)	7,726
Total commercial business	21,999		(623		)	569		1,215			23,160
One-to-four family residential	1,056		(15		)	—		80			1,121
Real estate construction and land development:
One-to-four family residential	862		—			2		152			1,016
Five or more family residential and commercial properties	1,190		—			—		(146		)	1,044
Total real estate construction and land development	2,052		—			2		6			2,060
Consumer	6,081		(1,179		)	230		1,173			6,305
Unallocated	898		—			—		428			1,326
Total	$	32,086	$	(1,817	)	$	801	$	2,902		$	33,972

31

The following table details the allowance for loan losses disaggregated on the basis of the Company's impairment method as of June 30, 2018.

	Loans Individually Evaluated for Impairment		Loans Collectively Evaluated for Impairment		PCI Loans		Total Allowance for Loan Losses
	(In thousands)
Commercial business:
Commercial and industrial	$	1,706	$	7,564	$	918	$	10,188
Owner-occupied commercial real estate	1,724		2,736		786		5,246
Non-owner occupied commercial real estate	784		6,118		824		7,726
Total commercial business	4,214		16,418		2,528		23,160
One-to-four family residential	90		879		152		1,121
Real estate construction and land development:
One-to-four family residential	5		787		224		1,016
Five or more family residential and commercial properties	—		957		87		1,044
Total real estate construction and land development	5		1,744		311		2,060
Consumer	74		5,601		630		6,305
Unallocated	—		1,326		—		1,326
Total	$	4,383	$	25,968	$	3,621	$	33,972

The following table details the recorded investment balance of the loan receivables disaggregated on the basis of the Company’s impairment method as of June 30, 2018:

	Loans Individually Evaluated for Impairment		Loans Collectively Evaluated for Impairment		PCI Loans		Total Gross Loans Receivable
	(In thousands)
Commercial business:
Commercial and industrial	$	17,954	$	778,270	$	3,819	$	800,043
Owner-occupied commercial real estate	12,184		672,541		8,605		693,330
Non-owner occupied commercial real estate	10,585		1,165,930		11,033		1,187,548
Total commercial business	40,723		2,616,741		23,457		2,680,921
One-to-four family residential	291		88,394		3,833		92,518
Real estate construction and land development:
One-to-four family residential	1,084		70,459		391		71,934
Five or more family residential and commercial properties	—		93,304		11		93,315
Total real estate construction and land development	1,084		163,763		402		165,249
Consumer	382		381,445		4,160		385,987
Total	$	42,480	$	3,250,343	$	31,852	$	3,324,675

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The following tables detail activity in the allowance for loan losses disaggregated by segment and class for the three and six months ended June 30, 2017.

	Balance at Beginning of Period		Charge-offs			Recoveries		Provision for Loan Losses			Balance at End of Period
	(In thousands)
Three Months Ended June 30, 2017
Commercial business:
Commercial and industrial	$	10,091	$	(63	)	$	452	$	171		$	10,651
Owner-occupied commercial real estate	4,216		(78		)	2		14			4,154
Non-owner occupied commercial real estate	7,601		—			—		108			7,709
Total commercial business	21,908		(141		)	454		293			22,514
One-to-four family residential	1,052		—			1		20			1,073
Real estate construction and land development:
One-to-four family residential	791		—			—		30			821
Five or more family residential and commercial properties	1,546		—			—		120			1,666
Total real estate construction and land development	2,337		—			—		150			2,487
Consumer	5,195		(398		)	110		803			5,710
Unallocated	1,102		—			—		(135		)	967
Total	$	31,594	$	(539	)	$	565	$	1,131		$	32,751
Six Months Ended June 30, 2017
Commercial business:
Commercial and industrial	$	10,968	$	(358	)	$	675	$	(634	)	$	10,651
Owner-occupied commercial real estate	3,661		(85		)	151		427			4,154
Non-owner occupied commercial real estate	7,753		—			—		(44		)	7,709
Total commercial business	22,382		(443		)	826		(251		)	22,514
One-to-four family residential	1,015		—			1		57			1,073
Real estate construction and land development:
One-to-four family residential	797		—			10		14			821
Five or more family residential and commercial properties	1,359		—			—		307			1,666
Total real estate construction and land development	2,156		—			10		321			2,487
Consumer	5,024		(941		)	217		1,410			5,710
Unallocated	506		—			—		461			967
Total	$	31,083	$	(1,384	)	$	1,054	$	1,998		$	32,751

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The following table details the allowance for loan losses disaggregated on the basis of the Company's impairment method as of December 31, 2017.

	Loans Individually Evaluated for Impairment		Loans Collectively Evaluated for Impairment		PCI Loans		Total Allowance for Loan Losses
	(In thousands)
Commercial business:
Commercial and industrial	$	1,326	$	7,558	$	1,026	$	9,910
Owner-occupied commercial real estate	621		2,557		814		3,992
Non-owner occupied commercial real estate	1,222		5,919		956		8,097
Total commercial business	3,169		16,034		2,796		21,999
One-to-four family residential	93		798		165		1,056
Real estate construction and land development:
One-to-four family residential	2		635		225		862
Five or more family residential and commercial properties	37		1,064		89		1,190
Total real estate construction and land development	39		1,699		314		2,052
Consumer	54		5,303		724		6,081
Unallocated	—		898		—		898
Total	$	3,355	$	24,732	$	3,999	$	32,086

The following table details the recorded investment balance of the loan receivables disaggregated on the basis of the Company’s impairment method as of December 31, 2017:

	Loans Individually Evaluated for Impairment		Loans Collectively Evaluated for Impairment		PCI Loans		Total Gross Loans Receivable
	(In thousands)
Commercial business:
Commercial and industrial	$	11,999	$	630,485	$	2,912	$	645,396
Owner-occupied commercial real estate	6,808		603,827		11,515		622,150
Non-owner occupied commercial real estate	16,019		957,233		13,342		986,594
Total commercial business	34,826		2,191,545		27,769		2,254,140
One-to-four family residential	299		81,443		5,255		86,997
Real estate construction and land development:
One-to-four family residential	1,247		50,649		89		51,985
Five or more family residential and commercial properties	645		94,819		2,035		97,499
Total real estate construction and land development	1,892		145,468		2,124		149,484
Consumer	442		349,194		5,455		355,091
Total	$	37,459	$	2,767,650	$	40,603	$	2,845,712

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(6) Other Real Estate Owned

Changes in other real estate owned during the three and six months ended June 30, 2017 were as follows:

	Three Months Ended June 30,				Six Months Ended June 30,
	2018		2017		2018		2017
	(In thousands)
Balance at the beginning of the period	$	—	$	786	$	—	$	754
Additions	434		—		434		32
Balance at the end of the period	$	434	$	786	$	434	$	786

At June 30, 2018, the carrying amount of other real estate owned that was the result of foreclosure and obtaining physical possession of residential real estate properties was $434,000. At June 30, 2018, the recorded investment of consumer mortgage loans secured by residential real estate properties (included in the one-to-four family residential loans in Note (4) Loans Receivable) for which formal foreclosure proceedings were in process was $77,000.

(7) Goodwill and Other Intangible Assets

(a) Goodwill

The Company’s goodwill represents the excess of the purchase price over the fair value of net assets acquired in the recent Puget Sound Merger on January 16, 2018 and the historical acquisitions of Washington Banking Company on May 1, 2014; Valley Community Bancshares on July 15, 2013; Western Washington Bancorp in 2006 and North Pacific Bank in 1998. The Company’s goodwill is assigned to the Bank and is evaluated for impairment at the Bank level (reporting unit).

The following table presents the change in goodwill for the periods indicated:

	Three Months Ended June 30,				Six Months Ended June 30,
	2018		2017		2018		2017
	(In thousands)
Balance at the beginning of the period	$	187,549	$	119,029	$	119,029	$	119,029
Additions as a result of acquisitions (1)	—		—		68,520		—
Balance at the end of the period	$	187,549	$	119,029	$	187,549	$	119,029

⁽¹⁾ See Note (2) Business Combination

The Company performed its annual goodwill impairment test during the fourth quarter of 2017 and determined based on its Step 1 analysis that the fair value of the reporting unit exceeded the carrying value, such that the Company's goodwill was not considered impaired. Changes in the economic environment, operations of the reporting unit or other adverse events could result in future impairment charges which could have a material impact on the Company’s operating results.

(b) Other Intangible Assets

The other intangible assets represent the core deposit intangible ("CDI") acquired in business combinations. The useful life of the CDI related to the acquisitions of Puget Sound Bancorp, Washington Banking Company, Valley Community Bancshares, and Northwest Commercial Bank were estimated to be ten, ten, ten, and five years, respectively.

35

The following table presents the change in other intangible assets for the periods indicated:

	Three Months Ended June 30,						Six Months Ended June 30,
	2018			2017			2018			2017
	(In thousands)
Balance at the beginning of the period	$	16,563		$	7,050		$	6,088		$	7,374
Additions as a result of acquisitions (1)	—			—			11,270			—
Amortization	(796		)	(323		)	(1,591		)	(647		)
Balance at the end of the period	$	15,767		$	6,727		$	15,767		$	6,727

⁽¹⁾ See Note (2) Business Combination

(8) Junior Subordinated Debentures

As part of the acquisition of Washington Banking Company on May 1, 2014, the Company assumed trust preferred securities and junior subordinated debentures with a total fair value of $18.9 million at the merger date.

Washington Banking Master Trust, a Delaware statutory business trust, was a wholly-owned subsidiary of the Washington Banking Company created for the exclusive purposes of issuing and selling capital securities and utilizing sale proceeds to acquire junior subordinated debentures issued by the Washington Banking Company. During 2007, the Trust issued $25.0 million of trust preferred securities with a 30-year maturity, callable after the fifth year by the Washington Banking. The trust preferred securities have a quarterly adjustable rate based upon the three-month London Interbank Offered Rate (“LIBOR”) plus 1.56%. On the merger date, the Company acquired the Trust, which retained the Washington Banking Master Trust name, and assumed the performance and observance of the covenants under the indenture related to the trust preferred securities.

The adjustable rate of the trust preferred securities at June 30, 2018 was 3.90%. The weighted average rate of the junior subordinated debentures was as follows for the indicated periods:

	Three Months Ended June 30,				Six Months Ended June 30,
	2018		2017		2018		2017
Weighted average rate (1)	6.28	%	5.04	%	6.01	%	4.96	%

⁽¹⁾ The weighted average rate includes the accretion of the discount established at the merger date which is amortized over the life of the trust preferred securities.

The junior subordinated debentures are the sole assets of the Trust and payments under the junior subordinated debentures are the sole revenues of the Trust. At June 30, 2018 and December 31, 2017, the balance of the junior subordinated debentures, net of unaccreted discount, was $20.2 million and $20.0 million, respectively. All of the common securities of the Trust are owned by the Company. Heritage has fully and unconditionally guaranteed the capital securities along with all obligations of the Trust under the trust agreements. For financial reporting purposes, the Company's investment in the Master Trust is accounted for under the equity method and is included in prepaid expenses and other assets on the Company's Condensed Consolidated Statements of Financial Condition. The junior subordinated debentures issued and guaranteed by the Company and held by the Master Trust are reflected as liabilities on the Company's Condensed Consolidated Statements of Financial Condition.

36

(9) Repurchase Agreements

The Company utilizes repurchase agreements with one-day maturities as a supplement to funding sources. Repurchase agreements are secured by pledged investment securities available for sale. Under the repurchase agreements, the Company is required to maintain an aggregate market value of securities pledged greater than the balance of the repurchase agreements. The Company is required to pledge additional securities to cover any declines below the balance of the repurchase agreements. For additional information on the total value of investment securities pledged for repurchase agreements see Note (3) Investment Securities.

The following table presents the Company's repurchase agreement obligations by class of collateral pledged:

	June 30, 2018		December 31, 2017
	(In thousands)
Mortgage-backed securities and collateralized mortgage obligations(1):
Residential	$	10,444	$	11,239
Commercial	11,724		20,582
Total repurchase agreements	$	22,168	$	31,821

⁽¹⁾ Issued and guaranteed by U.S. Government-sponsored agencies.

(10) Other Borrowings

(a) FHLB

The Federal Home Loan Bank ("FHLB") of Des Moines functions as a member-owned cooperative providing credit for member financial institutions. Advances are made pursuant to several different programs. Each credit program has its own interest rate and range of maturities. Limitations on the amount of advances are based on a percentage of the Bank's assets or on the FHLB’s assessment of the institution’s creditworthiness. At June 30, 2018, the Bank maintained a credit facility with the FHLB of Des Moines with available borrowing capacity of $838.1 million and had short-term FHLB advances outstanding of $75.5 million with maturity dates within 30 days. At December 31, 2017 there were FHLB advances outstanding of $92.5 million.

The following table sets forth the details of FHLB advances during the three and six months ended June 30, 2018 and 2017:

	Three Months Ended June 30,						Six Months Ended June 30,
	2018			2017			2018			2017
	(In thousands)
FHLB Advances:
Average balance during the period	$	79,115		$	107,125		$	57,544		$	104,144
Maximum month-end balance during the period	$	154,500		$	137,450		$	154,500		$	137,450
Weighted average rate during the period	2.04		%	0.89		%	1.93		%	0.86		%

Advances from the FHLB are collateralized by a blanket pledge on FHLB stock owned by the Bank, deposits at the FHLB, certain one-to-four single family residential loans or other assets, investment securities which are obligations of or guaranteed by the United States, or other assets. In accordance with the pledge agreement, the Company must maintain unencumbered collateral in an amount equal to varying percentages ranging from 100% to 160% of outstanding advances depending on the type of collateral.

(b) Federal Funds Purchased

The Bank maintains advance lines with Wells Fargo Bank, US Bank, The Independent Bankers Bank ("TIB") and Pacific Coast Bankers’ Bank to purchase federal funds of up to $90.0 million as of June 30, 2018. The lines generally mature annually or are reviewed annually. As of June 30, 2018 and December 31, 2017, there were no federal funds purchased.

(c) Credit Facilities

The Bank maintains a credit facility with the Federal Reserve Bank of San Francisco ("Federal Reserve Bank") with available borrowing capacity of $58.1 million as of June 30, 2018, on which there were no borrowings outstanding as of June 30, 2018 or December 31, 2017. Any advances on the credit facility would have to be first secured by the Bank's investment securities or loans receivable.

37

(11) Derivative Financial Instruments

The Company has entered into certain interest rate swap contracts that are not designated as hedging instruments. The purpose of these derivative contracts is primarily to provide commercial business loan customers the ability to convert their loans from variable to fixed interest rates. Upon the origination of a derivative contract with a customer, the Company simultaneously enters into an offsetting derivative contract with a third party in order to offset its exposure on the variable and fixed rate components of the customer agreement. The Company recognizes immediate income based upon the difference in the bid/ask spread of the underlying transactions with its customers and the third party, which is recorded in interest rate swap fees on the Condensed Consolidated Statements of Income. Because the Company acts only as an intermediary for its customer, subsequent changes in the fair value of the underlying derivative contracts offset each other and do not significantly impact the Company’s results of operations.

The notional amounts and estimated fair values of interest rate derivative contracts outstanding at June 30, 2018 and December 31, 2017 are presented in the following table.

	June 30, 2018					December 31, 2017
	Notional Amounts		Estimated Fair Value			Notional Amounts		Estimated Fair Value
	(In thousands)
Non-hedging interest rate derivatives
Interest rate swaps with customer (1)	$	163,257	$	(5,454	)	$	146,537	$	(882	)
Interest rate swap with third party (1)	163,257		5,454			146,537		882

⁽¹⁾ The estimated fair value of the derivative included in prepaid and other assets on the Condensed Consolidated Statements of Financial Condition was $6.6 million and $3.4 million as of June 30, 2018 and December 31, 2017, respectively. The estimated fair value of the derivative included in accrued expenses and other liabilities on the Condensed Consolidated Statements of Financial Condition was $6.6 million and $3.4 million as of June 30, 2018 and December 31, 2017, respectively.

(12) Stockholders’ Equity

(a) Earnings Per Common Share

The following table illustrates the reconciliation of weighted average shares used for earnings per common share computations for the three and six months ended June 30, 2018 and 2017:

	Three Months Ended June 30,						Six Months Ended June 30,
	2018			2017			2018			2017
	(Dollars in thousands)
Net income:
Net income	$	11,857		$	11,828		$	20,944		$	21,144
Less: Dividends and undistributed earnings allocated to participating securities	(57		)	(83		)	(110		)	(164		)
Net income allocated to common shareholders	$	11,800		$	11,745		$	20,834		$	20,980
Basic:
Weighted average common shares outstanding	34,023,566			29,939,280			33,680,014			29,945,641
Less: Restricted stock awards	(88,905		)	(183,082		)	(107,897		)	(215,446		)
Total basic weighted average common shares outstanding	33,934,661			29,756,198			33,572,117			29,730,195
Diluted:
Basic weighted average common shares outstanding	33,934,661			29,756,198			33,572,117			29,730,195
Effect of potentially dilutive common shares (1)	172,631			83,411			157,819			64,042
Total diluted weighted average common shares outstanding	34,107,292			29,839,609			33,729,936			29,794,237

⁽¹⁾  Represents the effect of the assumed exercise of stock options and vesting of restricted stock units.

38

Potential dilutive shares are excluded from the computation of earnings per share if their effect is anti-dilutive. For the three and six months ended June 30, 2018 and 2017, there were no anti-dilutive shares outstanding related to options to acquire common stock. Anti-dilution occurs when the exercise price of a stock option or the unrecognized compensation cost per share of a restricted stock award exceeds the market price of the Company’s stock.

(b) Dividends

The timing and amount of cash dividends paid on the Company's common stock depends on the Company’s earnings, capital requirements, financial condition and other relevant factors. Dividends on common stock from the Company depend substantially upon receipt of dividends from the Bank, which is the Company’s predominant source of income.

The following table summarizes the dividend activity for the six months ended June 30, 2018 and calendar year 2017.

Declared	Cash Dividend per Share	Record Date	Paid Date
January 25, 2017	$0.12	February 9, 2017	February 23, 2017
April 25, 2017	$0.13	May 10, 2017	May 24, 2017
July 25, 2017	$0.13	August 10, 2017	August 24, 2017
October 25, 2017	$0.13	November 8, 2017	November 22, 2017
October 25, 2017	$0.10	November 8, 2017	November 22, 2017	*
January 24, 2018	$0.15	February 7, 2018	February 21, 2018
April 25, 2018	$0.15	May 10, 2018	May 24, 2018

* Denotes a special dividend.

The FDIC and the Washington State Department of Financial Institutions, Division of Banks have the authority under their supervisory powers to prohibit the payment of dividends by the Bank to the Company. Additionally, current guidance from the Board of Governors of the Federal Reserve System ("Federal Reserve") provides, among other things, that dividends per share on the Company’s common stock generally should not exceed earnings per share, measured over the previous four fiscal quarters. Current regulations allow the Company and the Bank to pay dividends on their common stock if the Company’s or the Bank’s regulatory capital would not be reduced below the statutory capital requirements set by the Federal Reserve and the FDIC.

(c) Stock Repurchase Program

The Company has had various stock repurchase programs since March 1999. On October 23, 2014, the Company's Board of Directors authorized the repurchase of up to 5% of the Company's outstanding common shares, or approximately 1,513,000 shares, under the eleventh stock repurchase plan. The number, timing and price of shares repurchased will depend on business and market conditions and other factors, including opportunities to deploy the Company's capital.

Since the inception of the eleventh plan, the Company has repurchased 579,996 shares at an average share prices of $16.67. No shares were repurchased under this plan during the three and six months ended June 30, 2018 and 2017.

In addition to the stock repurchases under a plan, the Company repurchases shares to pay withholding taxes on the vesting of restricted stock awards and units. The following table provides total repurchased shares for the periods indicated:

	Three Months Ended June 30,				Six Months Ended June 30,
	2018		2017		2018		2017
Repurchased shares to pay withholding taxes (1)	7,394		11,476		52,820		27,367
Stock repurchase to pay withholding taxes average share price	$	33.84	$	25.50	$	31.96	$	24.60

⁽¹⁾ During the six months ended June 30, 2018, the Company repurchased 26,741 of shares related to the withholding taxes due on the accelerated vesting of the restricted stock units of Puget Sound which were converted to Heritage common stock shares with an average share price of $31.80 under the terms of the merger. See Note (2) Business Combination.

39

(d) Issuance of Common Stock

The Puget Sound Merger was effective on January 16, 2018. In conjunction with the merger was the issuance of 4,112,258 shares of the Company's common stock at the merger date share price of $31.80 for a fair value of $130.8 million.

(13) Accumulated Other Comprehensive (Loss) Income

The changes in accumulated other comprehensive (loss) income (“AOCI”), all of which are due to changes in the fair value of available for sale securities and are net of tax, during the three and six months ended June 30, 2018 and 2017 are as follows:

	Three Months Ended						Six Months Ended
	2018			2017			2018			2017
	(In thousands)
Balance of AOCI at the beginning of period	$	(8,934	)	$	(1,133	)	$	(1,298	)	$	(2,606	)
Other comprehensive (loss) income before reclassification	(2,358		)	2,766			(9,874		)	4,239
Amounts reclassified from AOCI for gain on sale of investment securities included in net income	(14		)	(76		)	(41		)	(76		)
Net current period other comprehensive (loss) income	(2,372		)	2,690			(9,915		)	4,163
ASU 2016-01 implementation	—			—			(93		)	—
Balance of AOCI at the end of period	$	(11,306	)	$	1,557		$	(11,306	)	$	1,557

(14) Fair Value Measurements

Fair value is the exchange price that would be received for an asset or paid to transfer a liability (exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. There are three levels of inputs that may be used to measure fair values:

Level 1: Valuations for assets and liabilities traded in active exchange markets, or interest in open-end mutual funds that allow the Company to sell its ownership interest back to the fund at net asset value on a daily basis. Valuations are obtained from readily available pricing sources for market transactions involving identical assets, liabilities, or funds.

Level 2: Valuations for assets and liabilities traded in less active dealer or broker markets, such as quoted prices for similar assets or liabilities, quoted prices in markets that are not active, or valuations using methodologies with observable inputs.

Level 3: Valuations for assets and liabilities that are derived from other valuation methodologies, such as option pricing models, discounted cash flow models and similar techniques using unobservable inputs, and not based on market exchange, dealer, or broker traded transactions. Level 3 valuations incorporate certain assumptions and projections in determining the fair value assigned to such assets or liabilities.

(a) Recurring and Nonrecurring Basis

The Company used the following methods and significant assumptions to measure the fair value of certain assets on a recurring and nonrecurring basis:

Investment Securities Available for Sale:

The fair values of all investment securities are based upon the assumptions that market participants would use in pricing the security. If available, fair values of investment securities are determined by quoted market prices (Level 1). For investment securities where quoted market prices are not available, fair values are calculated based on market prices on similar securities (Level 2). For investment securities where quoted prices or market prices of similar securities are not available, fair values are calculated by using observable and unobservable inputs such as discounted cash flows or other market indicators (Level 3). Security valuations are obtained from third party pricing services for comparable assets or liabilities.

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Impaired Loans:

At the time a loan is considered impaired, its impairment is measured based on either the present value of expected future cash flows discounted at the loan’s effective interest rate, the observable market price, or the fair market value of the collateral (less costs to sell) if the loan is collateral-dependent. Impaired loans for which impairment is measured using the discounted cash flow approach are not considered to be measured at fair value because the loan’s effective interest rate is generally not a fair value input, and for the purposes of fair value disclosures, the fair value of these loans are measured commensurate with non-impaired loans. If the Company utilizes the fair market value of the collateral method, the fair value used to measure impairment is commonly based on recent real estate appraisals. These appraisals may utilize a single valuation approach or a combination of approaches including comparable sales and the income approach. Adjustments are routinely made in the appraisal process by independent appraisers to adjust for differences between the comparable sales and income data available. Such adjustments are usually significant and typically result in a Level 3 classification of the inputs for determining fair value. Non-real estate collateral may be valued using an appraisal, net book value based on the borrower’s financial statements, or aging reports, adjusted or discounted based on management’s historical knowledge, changes in market conditions from the time of the valuation and management’s expertise and knowledge of the client and client’s business (Level 3). Impaired loans are evaluated on a quarterly basis and impairment and is adjusted accordingly.

Other Real Estate Owned:

Assets acquired through or instead of loan foreclosure are initially recorded at fair value less costs to sell when acquired, establishing a new cost basis. These assets are subsequently accounted for at lower of cost or fair value less costs to sell. Fair value is commonly based on recent real estate appraisals. These appraisals may utilize a single valuation approach or a combination of approaches including comparable sales and the income approach. Adjustments are routinely made in the appraisal process by independent appraisers to adjust for differences between the comparable sales and income data available. Such adjustments are usually significant and typically result in Level 3 classification of the inputs for determining fair value.

Appraisals for both collateral-dependent impaired loans and other real estate owned are performed by certified general appraisers for commercial properties or certified residential appraisers for residential properties whose qualifications and licenses have been reviewed and verified by the Company. Once received, the Company reviews the assumptions and approaches utilized in the appraisal as well as the resulting fair value in comparison with independent data sources such as recent market data or industry-wide statistics. On a quarterly basis, the Company compares the actual selling price of collateral that has been liquidated to the most recent appraised value to determine what additional adjustment should be made to the appraisal value to arrive at fair value.

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Derivative Financial Instruments:

The Company obtains broker or dealer quotes to value its interest rate derivative contracts, which use valuation models using observable market data as of the measurement date (Level 2).

The following tables summarize the balances of assets and liabilities measured at fair value on a recurring basis as of June 30, 2018 and December 31, 2017.

	June 30, 2018
	Total		Level 1		Level 2		Level 3
	(In thousands)
Assets
Investment securities available for sale:
U.S. Treasury and U.S. Government-sponsored agencies	$	52,064	$	—	$	52,064	$	—
Municipal securities	203,022		—		203,022		—
Mortgage-backed securities and collateralized mortgage obligations:
Residential	312,122		—		312,122		—
Commercial	250,221		—		250,221		—
Collateralized loan obligations	2,256		—		2,256		—
Corporate obligations	25,690		—		25,690		—
Other asset-backed securities	28,295		—		28,295		—
Total investment securities available for sale	873,670		—		873,670		—
Derivative assets - interest rate swaps	6,629		—		6,629		—
Liabilities
Derivative liabilities - interest rate swaps	$	6,629	$	—	$	6,629	$	—

	December 31, 2017
	Total		Level 1		Level 2		Level 3
	(In thousands)
Assets
Investment securities available for sale:
U.S. Treasury and U.S. Government-sponsored agencies	$	13,442	$	—	$	13,442	$	—
Municipal securities	250,015		—		250,015		—
Mortgage-backed securities and collateralized mortgage obligations:
Residential	280,211		—		280,211		—
Commercial	217,079		—		217,079		—
Collateralized loan obligations	4,580		—		4,580		—
Corporate obligations	16,770		—		16,770		—
Other securities	28,433		146		28,287		—
Total investment securities available for sale	810,530		146		810,384		—
Derivative assets - interest rate swaps	3,418		—		3,418		—
Liabilities
Derivative liabilities - interest rate swaps	$	3,418	$	—	$	3,418	$	—

There were no transfers between Level 1 and Level 2 during the three and six months ended June 30, 2018 and 2017.

The Company may be required to measure certain financial assets and liabilities at fair value on a nonrecurring basis. These adjustments to fair value usually result from application of lower-of-cost-or-market accounting or write-downs of individual assets.

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The tables below represent assets measured at fair value on a nonrecurring basis at June 30, 2018 and December 31, 2017 and the net losses recorded in earnings during three and six months ended June 30, 2018 and 2017.

	Basis(1)		Fair Value at June 30, 2018
			Total		Level 1		Level 2		Level 3		Net Losses (Gains) Recorded in Earnings  During the Three Months Ended June 30, 2018		Net Losses (Gains) Recorded in Earnings  During the Six Months Ended June 30, 2018
	(In thousands)
Impaired loans:
Real estate construction and land development:
One-to-four family residential	$	976	$	304	$	—	$	—	$	304	$	3	3
Total assets measured at fair value on a nonrecurring basis	$	976	$	304	$	—	$	—	$	304	$	3	$	3

⁽¹⁾  Basis represents the unpaid principal balance of impaired loans.

	Basis(1)		Fair Value at December 31, 2017
			Total		Level 1		Level 2		Level 3		Net Losses Recorded in Earnings  During the Three Months Ended June 30, 2017		Net Losses (Gains) Recorded in Earnings  During the Six Months Ended June 30, 2017
	(In thousands)
Impaired loans:
Real estate construction and land development:
One-to-four family residential	$	976	$	307	$	—	$	—	$	307	$	—	—
Total assets measured at fair value on a nonrecurring basis	$	976	$	307	$	—	$	—	$	307	$	—	$	—

⁽¹⁾  Basis represents the unpaid principal balance of impaired loans.

The following table presents quantitative information about Level 3 fair value measurements for financial instruments measured at fair value on a non-recurring basis at June 30, 2018 and December 31, 2017.

	June 30, 2018
	Fair Value		Valuation Technique(s)	Unobservable Input(s)	Range of Inputs; Weighted Average
	(Dollars in thousands)
Impaired loans	$	304	Market approach	Adjustment for differences between the comparable sales	(91.2%) - (14.4)%; (44.0%)

	December 31, 2017
	Fair Value		Valuation Technique(s)	Unobservable Input(s)	Range of Inputs; Weighted Average
	(Dollars in thousands)
Impaired loans	$	307	Market approach	Adjustment for differences between the comparable sales	(91.5%) - (14.4%); (44.0%)

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(b) Fair Value of Financial Instruments

Because broadly traded markets do not exist for most of the Company’s financial instruments, the fair value calculations attempt to incorporate the effect of current market conditions at a specific time. These determinations are subjective in nature, involve uncertainties and matters of significant judgment and do not include tax ramifications; therefore, the results cannot be determined with precision, substantiated by comparison to independent markets and may not be realized in an actual sale or immediate settlement of the instruments. There may be inherent weaknesses in any calculation technique, and changes in the underlying assumptions used, including discount rates and estimates of future cash flows, could significantly affect the results. For all of these reasons, the aggregation of the fair value calculations presented herein do not represent, and should not be construed to represent, the underlying value of the Company.

The tables below present the carrying value amount of the Company’s financial instruments and their corresponding estimated fair values at the dates indicated.

	June 30, 2018
	Carrying Value		Fair Value		Fair Value Measurements Using:
					Level 1		Level 2		Level 3
	(In thousands)
Financial Assets:
Cash and cash equivalents	$	129,943	$	129,943	$	129,943	$	—	$	—
Investment securities available for sale	873,670		873,670		—		873,670		—
Federal Home Loan Bank stock	8,616		N/A		N/A		N/A		N/A
Loans held for sale	3,598		3,708		—		3,708		—
Total loans receivable, net	$	3,294,316	$	3,277,881	$	—	$	—	$	3,277,881
Accrued interest receivable	13,482		13,482		28		3,826		9,628
Derivative assets - interest rate swaps	6,629		6,629		—		6,629		—
Equity security	162		162		162		—		—
Financial Liabilities:
Noninterest deposits, interest bearing demand deposits, money market accounts and savings accounts	3,508,300		3,508,300		3,508,300		—		—
Certificate of deposit accounts	460,635		463,971		—		463,971		—
Federal Home Loan Bank advances	75,500		75,500		—		75,500		—
Securities sold under agreement to repurchase	22,168		22,168		22,168		—		—
Junior subordinated debentures	20,156		20,000		—		—		20,000
Accrued interest payable	198		198		46		107		45
Derivative liabilities - interest rate swaps	6,629		6,629		—		6,629		—

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	December 31, 2017
	Carrying Value		Fair Value		Fair Value Measurements Using:
					Level 1		Level 2		Level 3
	(In thousands)
Financial Assets:
Cash and cash equivalents	$	103,015	$	103,015	$	103,015	$	—	$	—
Investment securities available for sale	810,530		810,530		146		810,384		—
Federal Home Loan Bank stock	8,347		N/A		N/A		N/A		N/A
Loans held for sale	2,288		2,364		—		2,364		—
Loans receivable, net of allowance for loan losses	2,816,985		2,810,401		—		—		2,810,401
Accrued interest receivable	12,244		12,244		23		3,772		8,449
Derivative assets - interest rate swaps	3,418		3,418		—		3,418		—
Financial Liabilities:
Noninterest deposits, interest bearing demand deposits, money market accounts and savings accounts	$	2,994,662	$	2,994,662	$	2,994,662	$	—	$	—
Certificate of deposit accounts	398,398		397,039		—		397,039		—
Federal Home Loan Bank advances	92,500		92,500		—		92,500		—
Securities sold under agreement to repurchase	31,821		31,821		31,821		—		—
Junior subordinated debentures	20,009		18,500		—		—		18,500
Accrued interest payable	162		162		45		79		38
Derivative liabilities - interest rate swaps	3,418		3,418		—		3,418		—

(15) Stock-Based Compensation

On July 24, 2014, the Company's shareholders approved the Heritage Financial Corporation 2014 Omnibus Equity Plan (the "Plan") that provides for the issuance of 1,500,000 shares of the Company's common stock in the form of stock options, stock appreciation rights, stock awards (which includes restricted stock units, restricted stock, performance units, performance shares or bonus shares) and cash incentive awards. The Company issues new shares of common stock to satisfy share option exercises and restricted stock awards. As of June 30, 2018, shares that remain available for future issuance under the Company's stock-based compensation plans was 964,832.

(a) Stock Option Awards

Stock options generally vest ratably over three years and expire five years after they become exercisable or vest ratably over four years and expire ten years from date of grant. For the three and six months ended June 30, 2018 and 2017, the Company did not recognize any compensation expense or related tax benefit related to stock options as all of the compensation expense related to the outstanding stock options had been previously recognized. The intrinsic value and cash proceeds from options exercised during the six months ended June 30, 2018 was $82,000 and $47,000, respectively. The intrinsic value and cash proceeds from options exercised during the six months ended June 30, 2017 was $98,000 and $109,000, respectively.

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The following table summarizes the stock option activity for the six months ended June 30, 2018 and 2017:

	Shares		Weighted-Average Exercise Price		Weighted-Average Remaining Contractual Term (In years)	Aggregate Intrinsic Value (In thousands)
Outstanding at December 31, 2016	37,495		$	13.77
Exercised	(8,372	)	13.03
Forfeited or expired	(1,308	)	13.53
Outstanding, vested and expected to vest and exercisable at June 30, 2017	27,815		$	14.00	2.63	$	348
Outstanding at December 31, 2017	23,231		$	14.21
Exercised	(4,042	)	11.55
Forfeited or expired	(831	)	14.77
Outstanding, vested and expected to vest and exercisable at June 30, 2018	18,358		$	14.77	1.90	$	369

(b) Restricted Stock Awards

Restricted stock awards granted generally have a four-year cliff vesting or four-year ratable vesting schedule. For the three and six months ended June 30, 2018, the Company recognized compensation expense related to restricted stock awards of $249,000 and $532,000, respectively, and a related tax benefit of $52,000 and $112,000, respectively. For the three and six months ended June 30, 2017, the Company recognized compensation expense related to restricted stock awards of $359,000 and $804,000, respectively, and a related tax benefit of $126,000 and $282,000, respectively. As of June 30, 2018, the total unrecognized compensation expense related to non-vested restricted stock awards was $949,000 and the related weighted average period over which the compensation expense is expected to be recognized is approximately 1.38 years. The vesting date fair value of the restricted stock awards that vested during the six months ended June 30, 2018 and 2017 was $2.1 million and $2.6 million, respectively.

The following table summarizes the restricted stock award activity for the six months ended June 30, 2018 and 2017:

	Shares		Weighted-Average Grant Date Fair Value
Nonvested at December 31, 2016	261,296		$	16.80
Vested	(105,972	)	16.47
Forfeited	(7,704	)	16.78
Nonvested at June 30, 2017	147,620		$	17.04
Nonvested at December 31, 2017	137,399		$	17.00
Vested	(66,193	)	16.67
Forfeited	(2,394	)	16.86
Nonvested at June 30, 2018	68,812		$	17.32

(c) Restricted Stock Units

During 2017, the Company began issuing performance-based stock-settled restricted stock unit awards ("PRSU") and stock-settled restricted stock unit awards ("RSU"), collectively called "units". Restricted stock units granted vest ratably over three years. Performance restricted stock units granted generally have a three-year cliff vesting schedule. Additionally, performance restricted stock unit grants may be subject to performance-based vesting as well as other approved vesting conditions. The number of shares of actually delivered pursuant to the PRSUs depends on the performance of the Company's Total Shareholder Return and Return on Average Assets over the performance period in relation to the performance of the common stock of a predetermined peer group. The conditions of the grants allow for an actual payout ranging between no payout and 150% of target. The payout level is calculated based on actual performance achieved during the performance period compared to a defined peer group. The fair

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value of such PRSUs was determined using a Monte Carlo simulation and will be recognized over the subsequent three years. The Monte-Carlo simulation model uses the same input assumptions as the Black-Scholes model; however, it also further incorporates into the fair value determination the possibility that the market condition may not be satisfied. Compensation costs related to these awards are recognized regardless of whether the market condition is satisfied, provided that the requisite service has been provided.

Expected volatilities in the model were estimated using a historical period consistent with the performance period of approximately three years. The risk-free interest rate was based on the United States Treasury rate for a term commensurate with the expected life of the grant. The Company used the following assumptions to estimate the fair value of PRSUs granted during February 2018 and 2017:

	2018		2017
Shares issued	5,550		6,089
Expected Term in Years	2.84		2.85
Weighted-Average Risk Free Interest Rate	2.39	%	1.40	%
Expected Dividend Yield	—	%	—	%
Weighted-Average Fair Value	27.69		24.39
Correlation coefficient	ABA NASDAQ Community Bank Index		ABA NASDAQ Community Bank Index
Range of peer company volatilities	18.99% - 51.42%		17.8% - 63.1%
Range of peer company correlation coefficients	28.16% - 94.29%		8.24% - 89.79%
Heritage volatility	22.3	%	21.8	%
Heritage correlation coefficient	76.44	%	75.93	%

For the three and six months ended June 30, 2018, the Company recognized compensation expense related to the units of $435,000 and $775,000, respectively, and a related tax benefit of $91,000 and $163,000, respectively. For the three and six months ended June 30, 2017, the Company recognized compensation expense related the units of $171,000 and $236,000, respectively, and a related tax benefit of $60,000 and $83,000, respectively. As of June 30, 2018, the total unrecognized compensation expense related to non-vested units was $4.1 million and the related weighted average period over which the compensation expense is expected to be recognized is approximately 2.65 years. The vesting date fair value of the units that vested during the six months ended June 30, 2018 was $1.0 million. There were no units that vested during the six months ended June 30, 2017.

The following table summarizes the unit activity for the six months ended June 30, 2018 and 2017:

	Shares		Weighted-Average Grant Date Fair Value
Nonvested at December 31, 2016	—		$	—
Granted	92,019		25.29
Forfeited	(909	)	25.35
Nonvested at June 30, 2017	91,110		$	25.29
Nonvested at December 31, 2017	90,544		$	25.31
Granted	114,015		30.61
Vested	(32,262	)	25.42
Forfeited	(3,644	)	27.87
Nonvested at June 30, 2018	168,653		$	28.51

(16) Cash Requirement

The Company is required to maintain an average reserve balance with the Federal Reserve Bank or maintain such reserve balance in the form of cash. The required reserve balance at June 30, 2018 and December 31, 2017 was $10.9 million and $60,000, respectively, and was met by holding cash and maintaining an average balance with the Federal Reserve Bank.

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(17) Subsequent Event

On July 2, 2018, the Company completed the previously announced acquisition of Premier Commercial. As of the acquisition date, Premier Commercial was merged with and into Heritage and Premier Community Bank was merged with and into Heritage Bank. Premier Commercial had six branch locations. The Premier Merger is being accounted for using the acquisition method of accounting.

Pursuant the terms of the merger agreement, Premier Commercial shareholders received 0.4863 shares of Heritage common stock for each share of Premier Commercial common stock. Based on the June 29, 2018 closing price of Heritage common stock of $34.85, Heritage issued 2,848,579 shares of the Company's common stock and paid $2,000 in cash for fractional shares for total consideration of $99.3 million, including the value of the outstanding shares of Premier Commercial restricted stock which vested immediately at the merger date.

The operating results of the Company for the three and six months ended June 30, 2018 do not include the operating results related to the assets acquired and liabilities assumed in the Premier Merger as it was not completed until July 2, 2018. As of June 30, 2018, Premier Commercial had total assets of $381.7 million, total loans of $335.3 million and total deposits of $319.3 million. It is not practical to present financial information related to the fair value of assets acquired and liabilities assumed from Premier Commercial at this time because the fair value information has not been finalized.

For the three and six months ended June 30, 2018, the Company incurred acquisition related costs of $329,000 and $653,000, respectively, related to the Premier Merger.

ITEM 2. MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

The following discussion is intended to assist in understanding the financial condition and results of the Company as of and for the three and six months ended June 30, 2018. The information contained in this section should be read with the unaudited Condensed Consolidated Financial Statements and the accompanying Notes included herein, and the December 31, 2017 audited Consolidated Financial Statements and the accompanying Notes included in our Annual Report on Form 10-K for the year ended December 31, 2017.

Overview

Heritage Financial Corporation is a bank holding company which primarily engages in the business activities of our wholly-owned financial institution subsidiary, Heritage Bank. We provide financial services to our local communities with an ongoing strategic focus on our commercial banking relationships, market expansion and asset quality. At June 30, 2018, we had total assets of $4.79 billion and total stockholders’ equity of $639.5 million. The Company’s business activities generally are limited to passive investment activities and oversight of its investment in the Bank. Accordingly, the information set forth in this report relates primarily to the Bank’s operations.

Our business consists primarily of commercial lending and deposit relationships with small businesses and their owners in our market areas and attracting deposits from the general public. We also make real estate construction and land development loans and consumer loans. We additionally originate for sale or for investment purposes one-to-four family residential loans on residential properties located primarily in our markets.

Our core profitability depends primarily on our net interest income. Net interest income is the difference between interest income, which is the income that we earn on interest earning assets, comprised primarily of loans and investment securities, and interest expense, which is the amount we pay on our interest bearing liabilities, consisting primarily of deposits. Management strives to match the repricing characteristics of the interest earning assets and interest bearing liabilities to protect net interest income from changes in market interest rates and changes in the shape of the yield curve. Like most financial institutions, our net interest income is affected significantly by general and local economic conditions, particularly changes in market interest rates, and by governmental policies and actions of regulatory agencies. Net interest income is additionally affected by changes on the volume and mix of interest earning assets, interest earned on these assets, the volume and mix of interest bearing liabilities and interest paid on these liabilities.

Our net income is affected by many factors, including the provision for loan losses. The provision for loan losses is dependent on changes in the loan portfolio and management’s assessment of the collectability of the loan portfolio as well as prevailing economic and market conditions. The allowance for loan losses reflects the amount that we believe is appropriate to provide for probable incurred credit losses in our loan portfolio.

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Net income is also affected by noninterest income and noninterest expense. Noninterest income primarily consists of service charges and other fees, gain on sale of loans (net) and other income. Noninterest expense consists primarily of compensation and employee benefits, occupancy and equipment, professional services and data processing. Compensation and employee benefits consist primarily of the salaries and wages paid to our employees, payroll taxes, expenses for retirement and other employee benefits. Occupancy and equipment expenses are the fixed and variable costs of buildings and equipment, and consist primarily of lease payments, depreciation charges, maintenance, and costs of utilities. Data processing consists primarily of processing and network services related to the Bank’s core operating system, including account processing systems, electronic payments processing of products and services, and internet and mobile banking channels.

Results of operations may also be affected significantly by general and local economic and competitive conditions, governmental policies and actions of regulatory authorities. Other income and other expenses are also impacted by growth of operations and growth in the number of loan and deposit accounts through acquisitions and core banking business growth.

Earnings Summary

Comparison of quarter ended June 30, 2018 to the comparable quarter in the prior year.

Net income was $11.9 million, or $0.35 per diluted common share, for the three months ended June 30, 2018 compared to $11.8 million, or $0.40 per diluted common share, for the three months ended June 30, 2017. Net income increased $29,000, or 0.2%, for the three months ended June 30, 2018 compared to the three months ended June 30, 2017 primarily due to an increase in net interest income of $9.6 million, or 28.2%, offset partially by anincrease in noninterest expense of $7.9 million, or 28.4%, and a decrease in noninterest income of $3.1 million, or 29.3%. The increases in net interest income and noninterest expense were primarily the result of the Puget Sound Merger completed in January 2018. The decrease in noninterest income was due primarily to a gain on sale of a previously classified purchased credit impaired loan in the amount of $3.0 million recognized during the three months ended June 30, 2017.

Net interest income as a percentage of average interest earning assets (net interest margin) increased 30 basis points to 4.22% for the three months ended June 30, 2018 compared to 3.92% for the same period in 2017. The increase in net interest margin was primarily due to increases in loan yields and investment yields, offset partially by an increase in the cost of interest bearing liabilities.

The efficiency ratio consists of noninterest expense divided by the sum of net interest income before provision for loan losses plus noninterest income. The Company’s efficiency ratio was 69.58% for the three months ended June 30, 2018 compared to 62.01% for the three months ended June 30, 2017. The change in the efficiency ratio was primarily attributable to the increase in noninterest expense as a result of the Puget Sound Merger completed in January 2018, acquisition costs associated with the Puget Sound Merger and the Premier Merger, the buy-out of a third party contract in the amount $1.7 million during the three months ended June 30, 2018 and and a gain on sale of a previously classified purchased credit impaired loan in the amount of $3.0 million recognized during the three months ended June 30, 2017.

Comparison of six months ended June 30, 2018 to the comparable period in the prior year

Net income was $20.9 million, or $0.62 per diluted common share, for the six months ended June 30, 2018 compared to $21.1 million, or $0.71 per diluted common share, for the six months ended June 30, 2017. Net income decreased $200,000, or 0.9%, for the six months ended June 30, 2018 compared to the six months ended June 30, 2017 primarily due to an increase in noninterest expense of $17.4 million, or 31.7% and a decrease in noninterest income of $3.0 million, or 16.3%, partially offset by an increase in net interest income of $17.3 million, or 25.7%. The increases in noninterest expense and net interest income during the six months ended June 30, 2018 compared to the same period in 2017 were primarily the result of the Puget Sound Merger. The decrease in noninterest income was due primarily to a gain on sale of a previously classified purchased credit impaired loan in the amount of $3.0 million recognized during the three months ended June 30, 2017.

The net interest margin increased 26 basis points to 4.17% for the six months ended June 30, 2018 compared to 3.91% for the same period in 2017. Net interest margin increased due to increases in loan yields and in balances and yields on investments, offset partially by increases in the cost of interest bearing deposits.

The Company’s efficiency ratio was 72.67% for the six months ended June 30, 2018 compared to 64.49% for the six months ended June 30, 2017. The change in the efficiency ratio for the six months ended June 30, 2018 compared to the six months ended June 30, 2017 was primarily attributable to additional noninterest expense as a result of the Puget Sound Merger, acquisition costs associate with Puget Sound Merger and Premier Merger, and the buy-out of a third party contract in the amount $1.7 million, further explained in the "Noninterest Expense" section,

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during the three months ended June 30, 2018 as well as a gain on sale of a previously classified purchased credit impaired loan in the amount of $3.0 million recognized during the three months ended June 30, 2017.

Net Interest Income

One of the Company's key sources of earnings is net interest income. There are several factors that affect net interest income including, but not limited to, the volume, pricing, mix and maturity of interest earning assets and interest bearing liabilities; the volume of noninterest bearing deposits and other liabilities and stockholders' equity; the volume of noninterest earning assets; market interest rate fluctuations; and asset quality.

Comparison of quarter ended June 30, 2018 to the comparable quarter in the prior year.

Net interest income increased $9.6 million, or 28.2%, to $43.7 million for the three months ended June 30, 2018 compared to $34.1 million for the same period in 2017. The increase in net interest income was primarily due to increases in average interest earning assets primarily as a result of the Puget Sound Merger and, to a lesser extent, organic growth. Net interest income also increased due to increases in yields on interest earning assets as a result of higher short-term interest rates reflecting increases in the target federal funds rate over the last year. The following table provides relevant net interest income information for the dates indicated.

	Three Months Ended June 30,
	2018						2017
	Average Balance		Interest Earned/ Paid		Average Yield/ Rate (1)		Average Balance		Interest Earned/ Paid		Average Yield/ Rate (1)
	(Dollars in thousands)
Interest Earning Assets:
Total loans receivable, net (2) (3)	$	3,266,092	$	41,141	5.05	%	$	2,657,946	$	31,500	4.75	%
Taxable securities	638,092		4,068		2.56		567,066		3,141		2.22
Nontaxable securities (3)	201,104		1,220		2.43		224,719		1,304		2.33
Other interest earning assets	51,022		242		1.90		39,403		96		0.98
Total interest earning assets	4,156,310		46,671		4.50	%	3,489,134		36,041		4.14	%
Noninterest earning assets	570,409						420,658
Total assets	$	4,726,719					$	3,909,792
Interest Bearing Liabilities:
Certificates of deposit	$	418,129	$	797	0.76	%	$	363,053	$	479	0.53	%
Savings accounts	512,832		487		0.38		497,033		316		0.26
Interest bearing demand and money market accounts	1,796,095		911		0.20		1,484,767		612		0.17
Total interest bearing deposits	2,727,056		2,195		0.32		2,344,853		1,407		0.24
FHLB advances and other borrowings	79,120		402		2.04		107,132		239		0.89
Securities sold under agreement to repurchase	27,935		16		0.23		22,852		12		0.21
Junior subordinated debentures	20,108		315		6.28		19,822		249		5.04
Total interest bearing liabilities	2,854,219		2,928		0.41	%	2,494,659		1,907		0.31	%
Demand and other noninterest bearing deposits	1,175,331						873,314
Other noninterest bearing liabilities	60,434						44,582
Stockholders’ equity	636,735						497,237
Total liabilities and stockholders’ equity	$	4,726,719					$	3,909,792
Net interest income			$	43,743					$	34,134
Net interest spread					4.09	%					3.83	%
Net interest margin					4.22	%					3.92	%
Average interest earning assets to average interest bearing liabilities					145.62	%					139.86	%

⁽¹⁾  Annualized

⁽²⁾   The average loan balances presented in the table are net of allowances for loan losses. Nonaccrual loans have been included in the table as loans carrying a zero yield.

⁽³⁾   Yields on tax-exempt securities and loans have not been stated on a tax-equivalent basis.

50

Interest Income

Total interest income increased $10.6 million, or 29.5%, to $46.7 million for the three months ended June 30, 2018 compared to $36.0 million for the same period in 2017. The balance of average interest earning assets increased $667.2 million, or 19.1%, to $4.16 billion for the three months ended June 30, 2018 from $3.49 billion for the three months ended June 30, 2017 and the yield on total interest earning assets increased 36 basis points to 4.50% for the three months ended June 30, 2018 compared to 4.14% for the three months ended June 30, 2017.

Interest income from interest and fees on loans increased $9.6 million, or 30.6%, to $41.1 million for the three months ended June 30, 2018 from $31.5 million for the same period in 2017 primarily due to an increase in average total loans receivable, net of $608.1 million, or 22.9%, as a result of loan growth which was substantially due to the Puget Sound Merger. The loan yield increased 30 basis points to 5.05% for the three months ended June 30, 2018 from 4.75% for the three months ended June 30, 2017. The increase in loan yield was due to a combination of higher contractual note rates as a result of the increasing interest rate environment, higher loan yields from the loans acquired in the Puget Sound Merger as compared to legacy Heritage loans, and an increase in incremental accretion on purchased loans substantially due to loans acquired in the Puget Sound Merger.

The following table presents the loan yield and effects of the incremental accretion on purchased loans for the three months ended June 30, 2018 and 2017:

	Three Months Ended June 30,
	2018			2017
	(Dollars in thousands)
Loan yield, excluding incremental accretion on purchased loans (1)	4.81		%	4.53		%
Impact on loan yield from incremental accretion on purchased loans (1)	0.24		%	0.22		%
Loan yield	5.05		%	4.75		%
Incremental accretion on purchased loans (1)	$	1,992		$	1,481

⁽¹⁾  As of the dates of the completion of each of the merger and acquisition transactions, purchased loans were recorded at their estimated fair value, including our estimate of future expected cash flows until the ultimate resolution of these credits. The difference between the contractual loan balance and the fair value represents the purchased discount. The purchased discount is modified quarterly as a result of cash flow re-estimation. The incremental accretion income represents the amount of income recorded on the purchased loans in excess of the contractual stated interest rate in the individual loan notes.

Incremental accretion income was $2.0 million and $1.5 million for the three months ended June 30, 2018 and 2017, respectively. The increase in the incremental accretion during the three months ended June 30, 2018 was primarily due to the accretion of the loans acquired in the Puget Sound Merger. The incremental accretion and the impact to loan yield will change during any quarter based on the volume of prepayments, but is expected to decrease over time as the balance of the purchased loans continues to decrease.

Total interest income increased primarily due to the increase in interest and fees on loans discussed above and secondarily due to an $843,000, or 19.0%, increase in interest income on investment securities to $5.3 million during the three months ended June 30, 2018 from $4.4 million for the three months ended June 30, 2017. The increase in income on investment securities was primarily a result of an increase in investment yields, primarily reflecting the effect of the rise in interest rates on our adjustable rate investment securities, and secondarily to higher yields on new investment purchases for the three months ended June 30, 2018 compared to the same period in 2017. Yields on taxable securities increased 34 basis points to 2.56% for the three months ended June 30, 2018 from 2.22% for the same period in 2017. Yields on nontaxable securities increased 10 basis points to 2.43% for the three months ended June 30, 2018 from 2.33% for the same period in 2017. The average balance of investment securities increased $47.4 million, or 6.0%, to $839.2 million during the three months ended June 30, 2018 from $791.8 million during the three months ended June 30, 2017. The Company has actively managed its investment securities portfolio to improve performance in an increasing rate environment.

Interest income on other interest earning assets increased $146,000, or 152.1%, due to a combination of an increase in the yields reflecting the rise in interest rates and an increase in interest earning deposits as the Bank held more funds in interest earning accounts at the Federal Reserve Bank compared to the same period in 2017, substantially due to the Puget Sound Merger. Average other interest earning assets increased $11.6 million, or 29.5%, to $51.0 million for the three months ended June 30, 2018 compared to $39.4 million for the three months ended June 30, 2017.

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Interest Expense

Total interest expense increased $1.0 million, or 53.5%, to $2.9 million for the three months ended June 30, 2018 compared to $1.9 million for the same period in 2017. The average cost of interest bearing liabilities increased 10 basis points to 0.41% for the three months ended June 30, 2018 from 0.31% for the three months ended June 30, 2017 as a result of the rise in market interest rates. Total average interest bearing liabilities increased $359.6 million, or 14.4%, to $2.85 billion for the three months ended June 30, 2018 from $2.49 billion for the three months ended June 30, 2017 substantially due to the Puget Sound Merger.

The average cost of interest bearing deposits increased eight basis points to 0.32% for the three months ended June 30, 2018 from 0.24% for the same period in 2017 primarily as a result of the increase in market interest rates. The cost of certificates of deposit increased 23 basis points to 0.76% for the three months ended June 30, 2018 from 0.53% for the same period in 2017. The Company was able to mitigate the rise in market interest rates by increasing the average balance of noninterest bearing deposits at a higher growth rate than that of interest bearing deposits. The average balance of noninterest bearing deposits increased by $302.0 million, or 34.6%, for the three months ended June 30, 2018 to $1.18 billion the three months ended June 30, 2018 compared to an increase in the average balance of interest bearing demand and money market deposits of $311.3 million, or 21.0%, for the three months ended June 30, 2018 to $1.80 billion at June 30, 2018 and an increase in the average balance of certificate of deposit accounts $55.1 million, or 15.2%, for the three months ended June 30, 2018 to $418.1 million at June 30, 2018. The total cost of deposits increased to 0.23% for the three months ended June 30, 2018 compared to 0.18% for the same period in 2017. The increase in average deposits was primarily as a result of the Puget Sound Merger.

Interest expense on FHLB advances and other borrowings increased $163,000, or 68.2%, to $402,000 for the three months ended June 30, 2018 from $239,000 for the same period in 2017 due to an increase in market rates, partially offset by a decrease in the average balance. The average cost of FHLB advances and other borrowings for the three months ended June 30, 2018 was 2.04%, an increase of 115 basis points from 0.89% for the same period in 2017. The average balance for FHLB advances and other borrowings decreased $28.0 million, or 26.1%, to $79.1 million for the three months ended June 30, 2018 from $107.1 million for the same period in 2017, as a result of repayments from using cash and cash proceeds from the sale of investment securities acquired in the Puget Sound Merger.

The average rate of the junior subordinated debentures, including the effects of accretion of the discount established as of the date of the merger with Washington Banking Company, for the three months ended June 30, 2018 was 6.28%, an increase of 124 basis points from 5.04% for the same period in 2017. The rate increase on the junior subordinated debentures was due to an increase in the three-month LIBOR rate to 2.34% at June 30, 2018 from 1.30% on June 30, 2017.

Net Interest Margin

Net interest margin increased 30 basis points for the three months ended June 30, 2018 to 4.22% from 3.92% for the same period in 2017 primarily due to the above mentioned changes in yields and costs of funds. The net interest spread increased 26 basis points for the three months ended June 30, 2018 to 4.09% from 3.83% for the same period in 2017 primarily due to the increase in yields on total interest earning assets.

Net interest margin is impacted by the incremental accretion on purchased loans. The following table presents the net interest margin and effects of the incremental accretion on purchased loans for the three months ended June 30, 2018 and 2017:

	Three Months Ended June 30,
	2018		2017
Net interest margin, excluding incremental accretion on purchased loans (1)	4.03	%	3.75	%
Impact on net interest margin from incremental accretion on purchased loans (1)	0.19		0.17
Net interest margin	4.22	%	3.92	%

⁽¹⁾  As of the dates of the completion of each of the merger and acquisition transactions, purchased loans were recorded at their estimated fair value, including our estimate of future expected cash flows until the ultimate resolution of these credits. The difference between the contractual loan balance and the fair value represents the purchased discount. The purchased discount is modified quarterly as a result of cash flow re-estimation. The incremental accretion income represents the amount of income recorded on the purchased loans in excess of the contractual stated interest rate in the individual loan notes.

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Comparison of six months ended June 30, 2018 to the comparable period in the prior year

Net interest income increased $17.3 million, or 25.7%, to $84.6 million for the six months ended June 30, 2018 compared to $67.3 million for the same period in 2017. The following table provides relevant net interest income information for the dates indicated.

	Six Months Ended June 30,
	2018						2017
	Average Balance		Interest Earned/ Paid		Average Yield/ Rate (1)		Average Balance		Interest Earned/ Paid		Average Yield/ Rate (1)
	(Dollars in thousands)
Interest Earning Assets:
Total loans receivable, net (2) (3)	$	3,208,799	$	79,300	4.98	%	$	2,644,953	$	61,985	4.73	%
Taxable securities	614,488		7,597		2.49		567,192		6,190		2.20
Nontaxable securities (3)	212,305		2,561		2.43		223,499		2,572		2.32
Other interest earning assets	52,302		460		1.77		31,389		143		0.92
Total interest earning assets	4,087,894		89,918		4.44	%	3,467,033		70,890		4.12	%
Noninterest earning assets	552,736						427,894
Total assets	$	4,640,630					$	3,894,927
Interest Bearing Liabilities:
Certificates of deposit	$	420,834	$	1,557	0.75	%	$	357,209	$	894	0.50	%
Savings accounts	509,514		902		0.36		501,571		581		0.23
Interest bearing demand and money market accounts	1,771,084		1,696		0.19		1,483,972		1,198		0.16
Total interest bearing deposits	2,701,432		4,155		0.31		2,342,752		2,673		0.23
FHLB advances and other borrowings	57,546		552		1.93		104,148		442		0.86
Securities sold under agreement to repurchase	29,094		33		0.23		20,946		22		0.21
Junior subordinated debentures	20,071		598		6.01		19,786		487		4.96
Total interest bearing liabilities	2,808,143		5,338		0.38	%	2,487,632		3,624		0.29	%
Demand and other noninterest bearing deposits	1,144,479						869,910
Other noninterest bearing liabilities	62,094						45,890
Stockholders’ equity	625,914						491,495
Total liabilities and stockholders’ equity	$	4,640,630					$	3,894,927
Net interest income			$	84,580					$	67,266
Net interest spread					4.06	%					3.83	%
Net interest margin					4.17	%					3.91	%
Average interest earning assets to average interest bearing liabilities					145.57	%					139.37	%

⁽¹⁾  Annualized

⁽²⁾   The average loan balances presented in the table are net of allowances for loan losses. Nonaccrual loans have been included in the table as loans carrying a zero yield.

⁽³⁾   Yields on tax-exempt securities and loans have not been stated on a tax-equivalent basis.

Interest Income

Total interest income increased $19.0 million, or 26.8%, to $89.9 million for the six months ended June 30, 2018 compared to $70.9 million for the same period in 2017. The balance of average interest earning assets increased $620.9 million, or 17.9%, to $4.09 billion for the six months ended June 30, 2018 from $3.47 billion for the six months ended June 30, 2017 and the yield on total interest earning assets increased 32 basis points to 4.44% for the six months ended June 30, 2018 compared to 4.12% for the six months ended June 30, 2017.

Interest income from interest and fees on loans increased $17.3 million, or 27.9%, to $79.3 million for the six months ended June 30, 2018 from $62.0 million for the same period in 2017 due primarily to an increase in average loans receivable, net and to a lesser extent by an increase in loan yields. Average total loans receivable, net increased $563.8 million, or 21.3%, to $3.21 billion for the six months ended June 30, 2018 compared to $2.64 billion for the six months ended June 30, 2017. Loan yields increased 25 basis points to 4.98% for the six months ended June 30, 2018

53

from 4.73% for the six months ended June 30, 2017 due primarily to an increase in market interest rates and to a lesser extent due to an increase in incremental accretion on purchased loans.

The following table presents the loan yield and effects of the incremental accretion on purchased loans for the six months ended June 30, 2018 and 2017:

	Six Months Ended June 30,
	2018			2017
	(Dollars in thousands)
Loan yield, excluding incremental accretion on purchased loans (1)	4.75		%	4.53		%
Impact on loan yield from incremental accretion on purchased loans (1)	0.23		%	0.20		%
Loan yield	4.98		%	4.73		%
Incremental accretion on purchased loans (1)	$	3,624		$	2,651

⁽¹⁾  As of the dates of the completion of each of the merger and acquisition transactions, purchased loans were recorded at their estimated fair value, including our estimate of future expected cash flows until the ultimate resolution of these credits. The difference between the contractual loan balance and the fair value represents the purchased discount. The purchased discount is modified quarterly as a result of cash flow re-estimation. The incremental accretion income represents the amount of income recorded on the purchased loans in excess of the contractual stated interest rate in the individual loan notes.

Incremental accretion income was $3.6 million and $2.7 million for the six months ended June 30, 2018 and 2017, respectively. The increase in the incremental accretion was primarily a result of the loans acquired in the Puget Sound Merger, offset partially by a continued decline in purchased loan balances including a decrease in the prepayments of purchased loans during the six months ended June 30, 2018 compared to the same period in 2017. The incremental accretion is expected to decrease as the balance of the purchased loans continues to decrease.

Total interest income increased primarily due to the increase in interest and fees on loans discussed above and secondarily due to a $1.4 million, or 15.9%, increase in interest income on investment securities to $10.2 million during the six months ended June 30, 2018 from $8.8 million for the six months ended June 30, 2017. The increase in interest income on investment securities was the result of a combination of an increase in investment yields for the six months ended June 30, 2018 compared to the same period in 2017 and an increase in the average balance of investment securities during the periods. Yields on taxable securities increased 29 basis points to 2.49% for the six months ended June 30, 2018 from 2.20% for the same period in 2017. Yields on nontaxable securities increased 11 basis points to 2.43% for the six months ended June 30, 2018 from 2.32% for the same period in 2017. The average balance of investment securities increased $36.1 million, or 4.6%, to $826.8 million during the six months ended June 30, 2018 from $790.7 million during the six months ended June 30, 2017. The Company has actively managed its investment securities portfolio to improve performance in an increasing rate environment.

Income on other interest earning assets increased $317,000, or 221.7%, to $460,000 during the six months ended June 30, 2018 due primarily to an increase in market interest rates and an increase in the average balances. Average other interest earning assets increased $20.9 million, or 66.6%, to $52.3 million for the six months ended June 30, 2018 compared to $31.4 million for the six months ended June 30, 2017. The increase was due primarily to an increase in interest earning deposits, as the Bank held more funds in interest earning accounts at the Federal Reserve Bank of San Francisco compared to the same period in 2017.

Interest Expense

Total interest expense increased $1.7 million, or 47.3%, to $5.3 million for the six months ended June 30, 2018 compared to $3.6 million for the same period in 2017. The cost of interest bearing liabilities increased nine basis points to 0.38% for the six months ended June 30, 2018 from 0.29% for the six months ended June 30, 2017. Total average interest bearing liabilities increased by $320.5 million, or 12.9%, to $2.81 billion for the six months ended June 30, 2018 from $2.49 billion for the six months ended June 30, 2017. The increase in costs from the prior year was primarily a result of increases in market rates and the increased use of higher cost borrowings to fund asset growth.

The cost of interest bearing deposits increased eight basis points to 0.31% for the six months ended June 30, 2018 from 0.23% for the same period in 2017 due primarily to the increase in market interest rates. The cost of certificates of deposit increased to 0.75% for the six months ended June 30, 2018 from 0.50% for the same period in 2017. The Company was able to mitigate the rising interest rates by increasing the average balance of noninterest bearing deposits at a higher growth rate than that of interest bearing deposits. The average balance of noninterest bearing deposits increased by $274.6 million, or 31.6%, during the six months ended June 30, 2018 to $1.14 billion at June 30, 2018 compared to an increase in the average interest bearing demand and money market accounts of

54

$287.1 million, or 19.3%, to $1.77 billion during the six months ended June 30, 2018 and an increase in the average certificates of deposit accounts by $63.6 million, or 17.8%, to $420.8 million for the six months ended June 30, 2018. The cost of all deposit accounts increased to 0.22% for the six months ended June 30, 2018 compared to 0.17% for the six months ended June 30, 2017.

Interest expense on FHLB advances and other borrowings increased $110,000, or 24.9%, to $552,000 for the six months ended June 30, 2018 from $442,000 for the six months ended June 30, 2017 due to a combination of an increase in the cost of funds and a decrease in average balance. The average rate of the FHLB advances and other borrowings for the six months ended June 30, 2018 was 1.93%, an increase of 107 basis points from 0.86% for the same period in 2017. The average balance for FHLB advances and other borrowings decreased $46.6 million to $57.5 million for the six months ended June 30, 2018 from $104.1 million for the same period in 2017, due primarily to using cash and cash equivalents and proceeds from the sale of investment securities acquired in the Puget Sound Merger to pay down this higher cost funding source.

The average rate of the junior subordinated debentures, including the effects of accretion of the discount established as of the date of the merger with Washington Banking Company, for the six months ended June 30, 2018 was 6.01%, an increase of 105 basis points from 4.96% for the same period in 2017. The rate increase on the debentures was due to an increase in the three-month LIBOR rate to 2.34% at June 30, 2018 from 1.30% on June 30, 2017.

Net Interest Margin

Net interest margin for the six months ended June 30, 2018increased 26 basis points to 4.17% from 3.91% for the same period in 2017 primarily due to the above mentioned changes in yields and costs of funds in addition to an increase in incremental accretion on purchased loans as a result of the Puget Sound Merger. The net interest spread for the six months ended June 30, 2018increased 23 basis points to 4.06% from 3.83% for the same period in 2017.

Net interest margin is impacted by the incremental accretion on purchased loans. The following table presents the net interest margin and effects of the incremental accretion on purchased loans for the six months ended June 30, 2018 and 2017:

	Six Months Ended June 30,
	2018		2017
Net interest margin, excluding incremental accretion on purchased loans (1)	3.99	%	3.76	%
Impact on net interest margin from incremental accretion on purchased loans (1)	0.18		0.15
Net interest margin	4.17	%	3.91	%

⁽¹⁾  As of the dates of the completion of each of the merger and acquisition transactions, purchased loans were recorded at their estimated fair value, including our estimate of future expected cash flows until the ultimate resolution of these credits. The difference between the contractual loan balance and the fair value represents the purchased discount. The purchased discount is modified quarterly as a result of cash flow re-estimation. The incremental accretion income represents the amount of income recorded on the purchased loans in excess of the contractual stated interest rate in the individual loan notes.

Provision for Loan Losses

The Bank has established a comprehensive methodology for determining its allowance for loan losses. The allowance for loan losses is increased by provisions for loan losses charged to expense, and is reduced by loans charged-off, net of loan recoveries or a recovery of previous provision. The amount of the provision expense recognized during the three and six months ended June 30, 2018 and 2017 was calculated in accordance with the Bank's methodology. For additional information, see the section entitled "Analysis of Allowance for Loan Losses" below.

The provision for loan losses is dependent on the Bank’s ability to manage asset quality and control the level of net charge-offs through prudent underwriting standards. In addition, a decline in general economic conditions could increase future provisions for loan losses and have a material effect on the Company’s net income.

Comparison of quarter ended June 30, 2018 to the comparable quarter in the prior year.

The provision for loan losses increased $619,000, or 54.7%, to $1.8 million for the three months ended June 30, 2018 from $1.1 millionfor the three months ended June 30, 2017. The increase in the provision for loan losses for the three months ended June 30, 2018 from the same period in 2017 was primarily the result of changes in our volume and mix of loans, asset quality, certain environmental and historical loss factors and as a result of the impact of loan

55

growth. Based on a thorough review of the loan portfolio, the Bank determined that the provision for loan losses for the three months ended June 30, 2018 was appropriate as it was calculated in accordance with the Bank's methodology for determining the allowance for loan losses.

Comparison of six months ended June 30, 2018 to the comparable period in the prior year

The provision for loan losses increased $904,000, or 45.2% to $2.9 million for the six months ended June 30, 2018 from $2.0 million for the six months ended June 30, 2017. The increase in the provision for loan losses for the six months ended June 30, 2018 from the same period in 2017 was primarily the result of changes in our volume and mix of loans, asset quality, certain environmental and historical loss factors and as a result of the impact of loan growth. Based on a thorough review of the loan portfolio, the Bank determined that the provision for loan losses for the six months ended June 30, 2018 was appropriate as it was calculated in accordance with the Bank's methodology for determining the allowance for loan losses.

Noninterest Income

Comparison of quarter ended June 30, 2018 to the comparable quarter in the prior year.

Total noninterest income decreased $3.1 million, or 29.3%, to $7.6 million for the three months ended June 30, 2018 compared to $10.7 million for the same period in 2017. The following table presents the change in the key components of noninterest income for the periods noted.

	Three Months Ended June 30,
	2018		2017		Change			Percentage Change
	(Dollars in thousands)
Service charges and other fees	$	4,695	$	4,426	$	269		6.1	%
Gain on sale of investment securities, net	18		117		(99		)	(84.6	)
Gain on sale of loans, net	706		4,138		(3,432		)	(82.9	)
Interest rate swap fees	309		282		27			9.6
Other income	1,845		1,746		99			5.7
Total noninterest income	$	7,573	$	10,709	$	(3,136	)	(29.3	)%

Gain on the sale of loans, net decreased $3.4 million, or 82.9%, to $706,000 for the three months ended June 30, 2018 compared to $4.1 million the same period in 2017, due primarily to the gain on sale of a previously classified purchased credit impaired loan of $3.0 million recognized during the three months ended June 30, 2017.

Gain on sale of loans, net additionally decreased based on a decline in U.S. Small Business Administration ("SBA") loan originations and mortgage banking activities during the three months ended June 30, 2018 compared to the same period in 2017. The detail of gain on sale of loans, net is included in the following schedule.

	Three Months Ended June 30,
	2018		2017		Change			Percentage Change
	(Dollars in thousands)
Gain on sale of mortgage loans, net	$	572	$	731	$	(159	)	(21.8	)%
Gain on sale of guaranteed portion of SBA loans, net	134		409		(275		)	(67.2	)
Gain on sale of other loans, net	—		2,998		(2,998		)	(100.0	)
Gain on sale of loans, net	$	706	$	4,138	$	(3,432	)	(82.9	)%

The decrease in noninterest income was offset partially by an increase in service charges and other fees of $269,000, or 6.1% to $4.7 million for the three months ended June 30, 2018 compared to $4.4 million for the same period in 2017, due primarily to an increase in deposit balances and changes in fee structures on deposit accounts, including a business deposit consolidation process completed during second quarter 2017. Secondarily, service charges and other fees increased as a result of the deposit accounts acquired in the Puget Sound Merger.

56

Comparison of six months ended June 30, 2018 to the comparable period in the prior year

Total noninterest income decreased $3.0 million, or 16.3%, to $15.1 million for the six months ended June 30, 2018 compared to $18.1 million for the same period in 2017. The following table presents the change in the key components of noninterest income for the periods noted.

	Six Months Ended June 30,
	2018		2017		Change			Percentage Change
	(Dollars in thousands)
Service charges and other fees	$	9,238	$	8,639	$	599		6.9	%
Gain on sale of investment securities, net	53		117		(64		)	(54.7	)
Gain on sale of loans, net	1,580		5,333		(3,753		)	(70.4	)
Interest rate swap fees	360		415		(55		)	(13.3	)
Other income	3,890		3,568		322			9.0
Total noninterest income	$	15,121	$	18,072	$	(2,951	)	(16.3	)%

Service charges and other fees increased $599,000, or 6.9% to $9.2 million for the six months ended June 30, 2018 compared to $8.6 million for the same period in 2017, due primarily to an increase in deposit balances and changes in fee structures on deposit accounts, including a business deposit consolidation process completed during second quarter 2017 and deposit accounts acquired in the Puget Sound Merger.

Gain on sale of loans, net decreased $3.8 million, or 70.4% to $1.6 million for the six months ended June 30, 2018 compared to $5.3 million for the same period in 2017, due primarily the gain on sale of a previously classified as purchased credit impaired loan of $3.0 million recognized during the six months ended June 30, 2017. Gain on sale of mortgage and SBA loans also decreased during the six months ended June 30, 2018 compared to the same period in 2017 primarily due to less activity. Proceeds from sale of loans decreased $31.5 million, or 44.1% to $40.0 million for the six months ended June 30, 2018 from $71.4 million for the same period in 2017. The detail of gain on sale of loans, net is included in the following schedule.

	Six Months Ended June 30,
	2018		2017		Change			Percentage Change
	(Dollars in thousands)
Gain on sale of mortgage loans, net	$	1,224	$	1,640	$	(416	)	(25.4	)%
Gain on sale of guaranteed portion of SBA loans, net	356		695		(339		)	(48.8	)
Gain on sale of other loans, net	—		2,998		(2,998		)	(100.0	)
Gain on sale of loans, net	$	1,580	$	5,333	$	(3,753	)	(70.4	)%

57

Noninterest Expense

Comparison of quarter ended June 30, 2018 to the comparable quarter in the prior year.

Noninterest expense increased $7.9 million, or 28.4%, to $35.7 million during the three months ended June 30, 2018 compared to $27.8 million for the three months ended June 30, 2017. The following table presents changes in the key components of noninterest expense for the periods noted.

	Three Months Ended June 30,
	2018		2017		Change			Percentage Change
	(Dollars in thousands)
Compensation and employee benefits	$	19,321	$	16,272	$	3,049		18.7	%
Occupancy and equipment	4,810		3,818		992			26.0
Data processing	2,507		2,002		505			25.2
Marketing	823		805		18			2.2
Professional services	3,529		1,053		2,476			235.1
State and local taxes	716		639		77			12.1
Federal deposit insurance premium	375		357		18			5.0
Other real estate owned, net	—		21		(21		)	(100.0	)
Amortization of intangible assets	796		323		473			146.4
Other expense	2,829		2,519		310			12.3
Total noninterest expense	$	35,706	$	27,809	$	7,897		28.4	%

The Company has incurred significant non-recurring acquisition costs. The following table presents these expenses by key component. There were no such expenses incurred during the three months ended June 30, 2017.

	Three Months Ended June 30,
	2018
Compensation and employee benefits	$	67
Occupancy and equipment	28
Data processing	425
Marketing	5
Professional services	337
Other expense	18
Total acquisition costs	$	880

Compensation and employee benefits increased $3.0 million, or 18.7%, to $19.3 million during the three months ended June 30, 2018 from $16.3 million during the three months ended June 30, 2017. The increase in the three months ended June 30, 2018 compared to 2017 was primarily as a result of additional employees, primarily due to the Puget Sound Merger, and standard salary increases. The average full time equivalent employees increased to 819 for the three months ended June 30, 2018 compared to 750 for the same period in 2017.

Professional services increased $2.5 million, or 235.1%, to $3.5 million during the three months ended June 30, 2018 from $1.1 million during the three months ended June 30, 2017 substantially due to the buy-out of a third party contract in the amount $1.7 million. The third party assisted the Company in its deposit product realignment and was compensated based on success factors over the three years subsequent to implementation. The Company assessed the contract and determined that it was advantageous to buy-out the contract prior to the system conversions relating to the Puget Sound Merger and Premier Merger. The Company expects the accumulated savings in future professional services expenses to fully offset the cost of the buy-out by the end of 2019. In addition, professional services costs also increased in 2018 compared to 2017 as a result of acquisition costs.

Occupancy and equipment increased $992,000, or 26.0%, to $4.8 million during the three months ended June 30, 2018 from $3.8 million during the three months ended June 30, 2017. The increase in the three months ended June 30, 2018 compared to 2017 was substantially related to expansion in the Seattle, Bellevue and Portland branches.

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The Bellevue expansion included the lease obtained from the Puget Sound Merger and more space leased subsequent to the merger.

Data processing increased $505,000, or 25.2%, to $2.5 million during the three months ended June 30, 2018 from $2.0 million during the three months ended June 30, 2017 substantially due to core system conversion costs related to the Puget Sound Merger recognized during the three months ended June 30, 2018 as well as additional operation costs associated with the increase in balances and transaction volume as a result of the Puget Sound Merger.

Amortization of intangible assets increased $473,000, or 146.4%, to $796,000 during the three months ended June 30, 2018 from $323,000 during the three months ended June 30, 2017. The increase in the three months ended June 30, 2018 compared to 2017 was a result of the amortization of the core deposit intangible recorded in the Puget Sound Merger of $513,000 during the three months ended June 30, 2018.

The ratio of noninterest expense to average assets (annualized) was 3.03% for the three months ended June 30, 2018 compared to 2.85% for the three months ended June 30, 2017. The increase was primarily a result of increased expenses as a result of the Puget Sound Merger in addition to the buy-out of the third party contract and acquisition costs recognized during the three months ended June 30, 2018.

Comparison of six months ended June 30, 2018 to the comparable period in the prior year

Noninterest expense increased $17.4 million, or 31.7%, to $72.5 million during the six months ended June 30, 2018 compared to $55.0 million for the six months ended June 30, 2017. The following table presents changes in the key components of noninterest expense for the periods noted.

	Six Months Ended June 30,
	2018		2017		Change			Percentage Change
	(Dollars in thousands)
Compensation and employee benefits	$	40,688	$	32,296	$	8,392		26.0	%
Occupancy and equipment	9,437		7,628		1,809			23.7
Data processing	5,112		3,917		1,195			30.5
Marketing	1,631		1,612		19			1.2
Professional services	6,366		2,062		4,304			208.7
State and local taxes	1,404		1,188		216			18.2
Federal deposit insurance premium	730		657		73			11.1
Other real estate owned, net	—		52		(52		)	(100.0	)
Amortization of intangible assets	1,591		647		944			145.9
Other expense	5,494		4,973		521			10.5
Total noninterest expense	$	72,453	$	55,032	$	17,421		31.7	%

The Company has incurred significant non-recurring acquisition costs. The following table presents these expenses by key component. There were no such expenses incurred during the six months ended June 30, 2017.

	Six Months Ended June 30,
	2018
Compensation and employee benefits	$	2,891
Occupancy and equipment	37
Data processing	777
Marketing	5
Professional services	1,935
Other expense	43
Total acquisition costs	$	5,688

Compensation and employee benefits increased $8.4 million, or 26.0%, to $40.7 million during the six months ended June 30, 2018 from $32.3 million during the six months ended June 30, 2017. The increase in the six months ended June 30, 2018 compared to 2017 was primarily due to increases in employees primarily due to the Puget Sound

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Merger, increases in senior level staffing, and increases in standard salary in addition to acquisition-related payments related to the Puget Sound Merger of $2.9 million during the six months ended June 30, 2018.

Occupancy and equipment increased $1.8 million, or 23.7%, to $9.4 million during the six months ended June 30, 2018 from $7.6 million during the six months ended June 30, 2017. The increase in the three months ended June 30, 2018 compared to 2017 was substantially related to expansion in the Seattle, Bellevue and Portland branches. The Bellevue expansion included the lease obtained from the Puget Sound Merger and more space leased subsequent to the merger.

Data processing increased $1.2 million, or 30.5%, to $5.1 million during the six months ended June 30, 2018 from $3.9 million during the six months ended June 30, 2017 primarily due to acquisition costs. The increase in the six months ended June 30, 2018 compared to 2017 was additionally due to higher transactional activity in the core operating system and internet banking as a result of the Puget Sound Merger and organic growth in loans and deposits.

Professional services increased $4.3 million, or 208.7%, to $6.4 million during the six months ended June 30, 2018 from $2.1 million during the six months ended June 30, 2017 partially due to acquisition costs incurred during the six months ended June 30, 2018 of $1.9 million. The increase in the six months ended June 30, 2018 compared to 2017 was additionally the result of the buy-out of a third party contract in the amount of $1.7 million during the six months ended June 30, 2018. As previously mentioned, the Company expects the accumulated savings in future professional services expenses to fully offset the cost of the buy-out by the end of 2019.

Amortization of intangible assets increased $944,000, or 145.9%, to $1.6 million during the six months ended June 30, 2018 from $647,000 during the six months ended June 30, 2017. The increase in the three months ended June 30, 2018 compared to 2017 was a result of the amortization of the core deposit intangible recorded in the Puget Sound Merger of $1.0 million during the six months ended June 30, 2018.

The ratio of noninterest expense to average assets was 3.15% for the six months ended June 30, 2018, compared to 2.85% for the six months ended June 30, 2017. The increase was primarily a result of increased expenses as a result of the Puget Sound Merger and acquisition costs recognized during the six months ended June 30, 2018.

Income Tax Expense

Comparison of quarter ended June 30, 2018 to the comparable quarter in the prior year.

Income tax expense decreased $2.1 million, or 50.8%, to $2.0 million for the three months ended June 30, 2018 from $4.1 million for the three months ended June 30, 2017. The effective tax rate was 14.5% for the three months ended June 30, 2018 compared to 25.6% for the same period in 2017. The decrease in the income tax expense and effective tax rate during the six months ended June 30, 2018 was primarily due to the impact of the Tax Cuts and Jobs Actenacted in December 2017, which lowered the corporate income tax rate to 21% from 35%.

Comparison of six months ended June 30, 2018 to the comparable period in the prior year

Income tax expense decreased $3.8 million, or 52.5%, to $3.4 million for the six months ended June 30, 2018 from $7.2 million for the six months ended June 30, 2017. The effective tax rate was 14.0% for the six months ended June 30, 2018 compared to 25.3% for the same period in 2017. The decrease in the income tax expense and effective tax rate during the six months ended June 30, 2018 was primarily due to the impact of the Tax Cuts and Jobs Act, offset partially by the increase in certain non-deductible acquisition costs.

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Financial Condition Overview

The table below provides a comparison of the changes in the Company's financial condition from December 31, 2017 to June 30, 2018, and the results of the Puget Sound Merger effective January 16, 2018:

	June 30, 2018			December 31, 2017			Change			Percentage Change		Fair Value of Puget Sound at Merger Date
	(Dollars in thousands)
Assets
Cash and cash equivalents	$	129,943		$	103,015		$	26,928		26.1	%	$	80,136
Investment securities available for sale, at fair value	873,670			810,530			63,140			7.8		80,353
Loans held for sale	3,598			2,288			1,310			57.3		—
Total loans receivable, net	3,294,316			2,816,985			477,331			16.9		388,462
Other real estate owned	434			—			434			N/A		—
Premises and equipment, net	75,364			60,325			15,039			24.9		732
Federal Home Loan Bank stock, at cost	8,616			8,347			269			3.2		623
Bank owned life insurance	82,031			75,091			6,940			9.2		6,264
Accrued interest receivable	13,482			12,244			1,238			10.1		1,448
Prepaid expenses and other assets	104,718			99,328			5,390			5.4		1,354
Other intangible assets, net	15,767			6,088			9,679			159.0		11,270
Goodwill	187,549			119,029			68,520			57.6		68,520
Total assets	$	4,789,488		$	4,113,270		$	676,218		16.4	%	$	639,162
Liabilities
Deposits	$	3,968,935		$	3,393,060		$	575,875		17.0	%	$	505,885
Federal Home Loan Bank advances	75,500			92,500			(17,000		)	(18.4	)	—
Junior subordinated debentures	20,156			20,009			147			0.7		—
Securities sold under agreement to repurchase	22,168			31,821			(9,653		)	(30.3	)	—
Accrued expenses and other liabilities	63,206			67,575			(4,369		)	(6.5	)	2,504
Total liabilities	4,149,965			3,604,965			545,000			15.1		508,389
Stockholders' equity
Common stock	491,026			360,590			130,436			36.2		130,773
Retained earnings	159,803			149,013			10,790			7.2		—
Accumulated other comprehensive loss, net	(11,306		)	(1,298		)	(10,008		)	771.0		—
Total stockholders' equity	639,523			508,305			131,218			25.8		130,773
Total liabilities and stockholders' equity	$	4,789,488		$	4,113,270		$	676,218		16.4	%	$	639,162

Total assets increased $676.2 million, or 16.4%, to $4.79 billion as of June 30, 2018 compared to $4.11 billion as of December 31, 2017. The Puget Sound Merger resulted in an increase of total assets, including goodwill, of $639.2 million at the merger date. The Company utilized cash and cash proceeds from the sale of investment securities acquired in the Puget Sound Merger to pay down FHLB advances during the six months ended June 30, 2018.

Total loans receivable, net, excluding loans acquired in the Puget Sound Merger increased $88.9 million, or 6.4% annualized, during the six months ended June 30, 2018.

Investment securities increased $63.1 million, or 7.8%, to $873.7 million at June 30, 2018 from $810.5 million at December 31, 2017 primarily as a result of investment purchases, offset partially by maturities, calls and payments of investment securities. The investment securities acquired in the Puget Sound Merger were sold shortly after the merger.

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Deposits, excluding Puget Sound Merger, increased $70.0 million, or 4.2% annualized, during the six months ended June 30, 2018. Brokered deposits increased $18.0 million, or 45.6%, to $57.6 million at June 30, 2018 compared to $39.6 million at December 31, 2017. Total non-maturity deposits increased to 88.4% of total deposits at June 30, 2018 from 88.3% at December 31, 2017 and certificates of deposit decreased to 11.6% of total deposits at June 30, 2018 from 11.7% at December 31, 2017.

Federal Home Loan Bank advances decreased $17.0 million, or 18.4%, to $75.5 million as of June 30, 2018 from $92.5 million as of December 31, 2017. The decrease was due to the repayment of FHLB advances using cash and cash proceeds from the sale of investment securities acquired in the Puget Sound Merger.

Total stockholders’ equity increased $131.2 million, or 25.8%, to $639.5 million as of June 30, 2018 from $508.3 million at December 31, 2017. The Company’s equity position was 13.4% of total assets as of June 30, 2018 and 12.4% as of December 31, 2017. Changes in stockholders' equity during the six months ended June 30, 2018 were as follows:

	Six Months Ended
	June 30, 2018
	(In thousands)
Balance, beginning of period	$	508,305
Common stock issued in the Puget Sound Merger	130,770
Net income	20,944
Dividends declared	(10,247		)
Accumulated other comprehensive loss	(9,915		)
Other	(334		)
Balance, end of period	$	639,523

Lending Activities

The Bank is a full service commercial bank, which originates a wide variety of loans with a focus on commercial business loans. Total loans receivable, net of allowance for loan losses, increased $477.3 million, or 16.9%, to $3.29 billion at June 30, 2018 from $2.82 billion at December 31, 2017. The increase in loans receivable was primarily due to the Puget Sound Merger. At the merger date, the Bank acquired fair value of commercial and industrial loans of $182.0 million, non-owner occupied commercial real estate loans of $101.2 million, and owner-occupied commercial real estate loans of $82.3 million.

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The following table provides information about our loan portfolio by type of loan at the dates indicated and the change between these dates. These balances are prior to deduction for the allowance for loan losses.

	June 30, 2018				December 31, 2017
	Balance		% of Total (3)		Balance		% of Total (3)		Change			%of Balance Change
	(Dollars in thousands)
Commercial business:
Commercial and industrial	$	800,043	24.0	%	$	645,396	22.7	%	$	154,647		24.0	%
Owner-occupied commercial real estate	693,330		20.8		622,150		21.8		71,180			11.4
Non-owner occupied commercial real estate	1,187,548		35.7		986,594		34.6		200,954			20.4
Total commercial business	2,680,921		80.5		2,254,140		79.1		426,781			18.9
One-to-four family residential (1)	92,518		2.8		86,997		3.1		5,521			6.3
Real estate construction and land development:
One-to-four family residential	71,934		2.2		51,985		1.8		19,949			38.4
Five or more family residential and commercial properties	93,315		2.8		97,499		3.4		(4,184		)	(4.3	)
Total real estate construction and land development (2)	165,249		5.0		149,484		5.2		15,765			10.5
Consumer	385,987		11.6		355,091		12.5		30,896			8.7
Gross loans receivable	3,324,675		99.9		2,845,712		99.9		478,963			16.8
Net deferred loan costs	3,613		0.1		3,359		0.1		254			7.6
Loans receivable, net	$	3,328,288	100.0	%	$	2,849,071	100.0	%	$	479,217		16.8	%

⁽¹⁾ Excludes loans held for sale of $3.6 million, and $2.3 million as of June 30, 2018 and December 31, 2017, respectively.

⁽²⁾ Balances do not include undisbursed loan commitments.

⁽³⁾ Percent of loans receivable, net.

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Nonperforming Assets and Credit Quality Metrics

The following table provides information about our nonaccrual loans, other real estate owned and performing TDR loans for the indicated dates.

	June 30, 2018			December 31, 2017
	(Dollars in thousands)
Nonaccrual loans:
Commercial business	$	15,235		$	9,098
One-to-four family residential	77			81
Real estate construction and land development	1,084			1,247
Consumer	127			277
Total nonaccrual loans (1)	16,523			10,703
Other real estate owned	434			—
Total nonperforming assets	$	16,957		$	10,703
Allowance for loan losses	$	33,972		$	32,086
Nonperforming loans to loans receivable, net	0.50		%	0.38		%
Allowance for loan losses to loans receivable, net	1.02		%	1.13		%
Allowance for loan losses to nonperforming loans	205.60		%	299.79		%
Nonperforming assets to total assets	0.35		%	0.26		%
Performing TDR loans:
Commercial business	$	25,488		$	25,729
One-to-four family residential	214			218
Real estate construction and land development	—			645
Consumer	255			165
Total performing TDR loans	$	25,957		$	26,757
Accruing loans past due 90 days or more	$	—		$	—
Potential problem loans	101,491			83,543

⁽¹⁾  At June 30, 2018 and December 31, 2017, $6.8 million and $5.2 million of nonaccrual loans were considered TDR loans, respectively.

Nonperforming Assets.    Nonperforming assets consist of nonaccrual loans and other real estate owned. Nonperforming assets increased $6.3 million to $17.0 million, or 0.35% of total assets at June 30, 2018 from $10.7 million, or 0.26% of total assets, at December 31, 2017 due to primarily to the increase in nonaccrual loans discussed below. Nonperforming assets additionally increased due to the addition of one other real estate owned property of $434,000 during the six months ended June 30, 2018. There was no other real estate owned at December 31, 2017.

Nonaccrual Loans.    Nonaccrual loans increased $5.8 million to $16.5 million, or 0.50% of loans receivable, net, at June 30, 2018 from $10.7 million, or 0.38% of loans receivable, net, at December 31, 2017. The increase was due primarily to three agricultural loan relationships that were transferred to nonaccrual status during the six months ended June 30, 2018 totaling $4.6 million at June 30, 2018. Two of these credit relationships are well-secured, and the Company did not record a related allowance for loan losses. The other relationship is partially guaranteed by the SBA and the Company recorded an allowance for loan losses of $91,000 at June 30, 2018 related to the unguaranteed portion of the loan.

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The following table reflects the changes in nonaccrual loans during the six months ended June 30, 2018:

	Six Months Ended
	June 30, 2018
	(In thousands)
Nonaccrual loans
Balance, beginning of period	$	10,703
Addition of previously classified pass graded loans	4,196
Addition of previously classified potential problem loans	3,691
Charge-offs	(438		)
Net principal payments	(1,629		)
Balance, end of period	$	16,523

At June 30, 2018, nonaccrual loans of $7.8 million had related allowance for loan losses of $1.9 million and nonaccrual loans of $8.7 million had no related allowance for loan losses. At December 31, 2017 nonaccrual loans of $3.8 million had related allowance for loan losses of $720,000 and nonaccrual loans of $6.9 million had no allowance for loan losses.

At June 30, 2018, nonperforming TDR loans, included in the nonaccrual loan table above, were $6.8 million and had a related allowance for loan losses of $726,000. At December 31, 2017, nonperforming TDR loans were $5.2 million and had a related allowance for loan losses of $379,000.

Troubled Debt Restructured Loans. TDR loans are considered impaired and are separately measured for impairment whether on accrual or nonaccrual status. The performing TDR loans are not considered nonperforming assets as they continue to accrue interest despite being considered impaired due to the restructured status. Performing TDR loans decreased $800,000, or 3.0%, to $26.0 million at June 30, 2018 from $26.8 million at December 31, 2017.

The following table reflects the changes in performing TDR loans during six months ended June 30, 2018:

	Six Months Ended
	June 30, 2018
	(In thousands)
Performing TDR loans
Balance, beginning of period	$	26,757
Addition of previously classified pass graded loans	1,236
Addition of previously classified potential problem loans	551
Net principal payments	(2,587		)
Balance, end of period	$	25,957

The related allowance for loan losses on performing TDR loans was $2.5 million as of June 30, 2018 and $2.6 million as of December 31, 2017.

Potential Problem Loans. Potential problem loans increased $17.9 million, or 21.5%, to $101.5 million at June 30, 2018 from $83.5 million at December 31, 2017. The increase was due primarily to the addition of an agricultural lending relationship totaling $14.5 million at June 30, 2018 and the addition of potential problem loans acquired in the Puget Sound Merger with a total outstanding balance of $4.9 million at June 30, 2018.

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The following table reflects the changes in potential problem loans during the six months ended June 30, 2018 (in thousands):

	Six Months Ended
	June 30, 2018
	(In thousands)
Potential problem loans
Balance, beginning of period	$	83,543
Addition of previously classified pass graded loans	44,955
Upgrades to pass graded loan status	(9,043		)
Transfers of loan to nonaccrual or troubled debt restructured status	(4,242		)
Charge-offs	(257		)
Net principal payments	(13,465		)
Balance, end of period	$	101,491

Analysis of Allowance for Loan Losses

The allowance for loan losses is established through a provision for loan losses charged against earnings. The balance of the allowance for loan losses is maintained at the amount management believes will be appropriate to absorb probable incurred credit losses in the loan portfolio at the balance sheet date. The allowance for loan losses is determined by applying estimated loss factors to the credit exposure from outstanding loans.

We assess the estimated credit losses inherent in our loan portfolio by considering a number of elements including:

• historical loss experience in the loan portfolio;

• impact of environmental factors, including:

◦ levels of and trends in delinquencies, classified and impaired loans;

◦ levels of and trends in charge-offs and recoveries;

◦ trends in volume and terms of loans;

◦ effects of changes in risk selection and underwriting standards, and other changes in lending policies, procedures and practices;

◦ experience, ability, and depth of lending management and other relevant staff;

◦ national and local economic trends and conditions;

◦ other external factors such as competition, legal and regulatory;

◦ effects of changes in credit concentrations; and

◦ other factors

We calculate an appropriate allowance for loan losses for the loans in our loan portfolio by applying historical loss factors for homogeneous classes of the portfolio, adjusted for changes to the above-noted environmental factors. We may record specific provisions for impaired loans, including loans on nonaccrual status and TDR loans, after a careful analysis of each loan’s credit and collateral factors. Our analysis of an appropriate allowance for loan losses combines the provisions made for our non-impaired loans and the specific provisions made for each impaired loan.

The allowance for loan losses on loans designated as non-PCI loans is similar to the methodology described above except that for non-PCI loans, the remaining unaccreted discounts resulting from the fair value adjustments recorded at the time the loans were purchased are additionally factored into the allowance methodology.

For the PCI loans, the acquisition date fair value incorporated our estimate of future expected cash flows until the ultimate resolution of these credits. To the extent actual or projected cash flows are less than previously estimated, additional provisions for loan losses on the PCI loan portfolio will be recognized immediately into earnings. To the extent actual or projected cash flows are more than previously estimated, the increase in cash flows is recognized immediately as a recapture of provision for loan losses up to the previously recognized provision for that loan or pool of loans, if any, and then prospectively recognized in interest income as a yield adjustment.

While we believe we use the best information available to determine the allowance for loan losses, our results of operations could be significantly affected if circumstances differ substantially from the assumptions used in determining the allowance. A decline in national and local economic conditions, or other factors, could result in a material increase in the allowance for loan losses and may adversely affect the Company’s financial condition and results of operations. In addition, the determination of the amount of the allowance for loan losses is subject to review

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by bank regulators, as part of their routine examination process, which may result in the establishment of an additional allowance for loan losses based upon their judgment of information available to them at the time of their examination.

The following table provides information regarding changes in our allowance for loan losses at and for the three and six months ended June 30, 2018 and 2017:

	Three Months Ended June 30,						Six Months Ended June 30,
	2018			2017			2018			2017
	(Dollars in thousands)
Allowance for loan losses on loans at the beginning of the period	$	33,261		$	31,594		$	32,086		$	31,083
Provision for loan losses	1,750			1,131			2,902			1,998
Charge-offs:
Commercial business	(542		)	(141		)	(623		)	(443		)
One-to-four family residential	(15		)	—			(15		)	—
Consumer	(694		)	(398		)	(1,179		)	(941		)
Total charge-offs	(1,251		)	(539		)	(1,817		)	(1,384		)
Recoveries:
Commercial business	68			454			569			826
One-to-four family residential	—			1			—			1
Real estate construction and land development	2			—			2			10
Consumer	142			110			230			217
Total recoveries	212			565			801			1,054
Net (charge-offs) recoveries	(1,039		)	26			(1,016		)	(330		)
Allowance for loan losses at the end of the period	$	33,972		$	32,751		$	33,972		$	32,751
Allowance for loan losses to loans receivable, net	1.02		%	1.19		%	1.02		%	1.19		%
Net charge-offs on loans to average loans, annualized	0.13		%	—		%	0.06		%	0.03		%
Loans receivable, net at the end of the period (1)	$	3,328,288		$	2,749,507		$	3,328,288		$	2,749,507
Average loans receivable during the period (1)	3,266,092			2,657,946			3,208,799			2,644,953

⁽¹⁾ Excludes loans held for sale.

The allowance for loan losses increased $1.9 million, or 5.9%, to $34.0 million at June 30, 2018 from $32.1 millionat December 31, 2017. The increase was the result of provision for loan losses of $2.9 million recognized during the six months ended June 30, 2018, offset partially by net charge-offs of $1.0 million recorded during the same period. The allowance for loan losses to loans receivable, net, decreased to 1.02% at June 30, 2018 from 1.13% at December 31, 2017 primarily as a result of an increase in loans from the Puget Sound Merger with no related allowance for loan losses.

The Company recorded charge-offs of $1.8 million during the six months ended June 30, 2018 due primarily to charge-offs of two agricultural relationships in the amount of $438,000, overdrafts on deposit accounts in the amount of $254,000 and a loan that was transferred to other real estate owned of $148,000. The remaining charge-offs were primarily a result of a large volume of small dollar consumer loans. The Company recorded recoveries of $801,000 during the six months ended June 30, 2018 primarily a result of cash received on a commercial and industrial loan of $324,000 and small recoveries on a large volume of small dollar consumer loans. The Company recorded net charge-offs on average loans, annualized, of 0.03% for the six months ended June 30, 2017 which were also primarily due to the large volumes of small dollar consumer loans.

As of June 30, 2018, the Bank identified $16.5 million of nonperforming loans and $26.0 million of performing TDR loans for a total of $42.5 million of impaired loans. Of these impaired loans, $12.1 million had no allowances for loan losses as their estimated collateral value or discounted expected cash flow is equal to or exceeds their carrying costs. The remaining $30.3 million of impaired loans had related allowances for loan losses totaling $4.4 million. As of December 31, 2017, the Bank identified $10.7 million of nonperforming loans and $26.8 million of performing TDR

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loans for a total of $37.5 million of impaired loans. Of these impaired loans, $10.4 million had no allowances for loan losses. The remaining $27.1 million of impaired loans had related allowances for loan losses totaling $3.4 million.

The following table outlines the allowance for loan losses and related loan balances on loans at June 30, 2018 and December 31, 2017:

	June 30, 2018			December 31, 2017
	(Dollars in thousands)
General Valuation Allowance:
Allowance for loan losses	$	25,968		$	24,732
Gross loans, excluding PCI and impaired loans	$	3,250,343		$	2,767,650
Percentage	0.80		%	0.89		%
PCI Allowance:
Allowance for loan losses	$	3,621		$	3,999
Gross PCI loans	$	31,852		$	40,603
Percentage	11.37		%	9.85		%
Specific Valuation Allowance:
Allowance for loan losses	$	4,383		$	3,355
Gross impaired loans	$	42,480		$	37,459
Percentage	10.32		%	8.96		%
Total Allowance for Loan Losses:
Allowance for loan losses	$	33,972		$	32,086
Gross loans receivable	$	3,324,675		$	2,845,712
Percentage	1.02		%	1.13		%

Based on the Bank's established comprehensive methodology, management deemed the allowance for loan losses of $34.0 million at June 30, 2018 (1.02% of loans receivable, net and 205.60% of nonperforming loans) appropriate to provide for probable incurred credit losses based on an evaluation of known and inherent risks in the loan portfolio at that date. This compares to an allowance for loan losses at December 31, 2017 of $32.1 million (1.13% of loans receivable, net and 299.79% of nonperforming loans). At the applicable acquisition or merger dates, no allowance for loan losses was established on purchased loans as the loans were accounted for at their fair value and a discount was established for the loans in accordance with U.S. GAAP. At June 30, 2018 and December 31, 2017, the remaining fair value discount for these purchased loans was $10.6 million and $10.1 million, respectively.

While we believe we use the best information available to determine the allowance for loan losses, our results of operations could be significantly affected if circumstances differ substantially from the assumptions used in determining the allowance. A decline in national and local economic conditions, or other factors, could result in a material increase in the allowance for loan losses and may adversely affect the Company’s financial condition and results of operations. In addition, the determination of the amount of the allowance for loan losses is subject to review by bank regulators, as part of their routine examination process, which may result in the establishment of an additional allowance for loan losses based upon their judgment of information available to them at the time of their examination. Because future events affecting borrowers and collateral cannot be predicted with certainty, there can be no assurance that the existing allowance for loan losses is appropriate or that increased provisions will not be necessary should the quality of the loans deteriorate. Any material increase in the allowance for loan losses would adversely affect the Company’s financial condition and results of operations.

Deposits and Other Borrowings

Total deposits increased $575.9 million, or 17.0%, to $3.97 billion at June 30, 2018 from $3.39 billion at December 31, 2017 due primarily to the deposits acquired in the Puget Sound Merger of $505.9 million at the merger date. Non-maturity deposits as a percentage of total deposits increased to 88.4% at June 30, 2018 from 88.3% at December 31, 2017 primarily as a result of the mix of deposits acquired from Puget Sound Merger, which had non-

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maturity deposits as a percentage of total deposits of 93.6% at the merger date. Based on the change in the mix and volume of deposits, the percentage of certificates of deposit to total deposits decreased to 11.6% at June 30, 2018 from 11.7% at December 31, 2017.

The following table summarizes the Company's deposits as of June 30, 2018 and December 31, 2017:

	June 30, 2018				December 31, 2017
	Balance		% of Total		Balance		% of Total		Change		%of Balance Change
	(Dollars in thousands)
Noninterest demand deposits	$	1,157,630	29.2	%	$	944,791	27.8	%	$	212,839	22.5	%
Interest bearing demand deposits	1,242,622		31.3		1,051,752		31.1		190,870		18.1
Money market accounts	597,673		15.1		499,618		14.7		98,055		19.6
Savings accounts	510,375		12.8		498,501		14.7		11,874		2.4
Total non-maturity deposits	3,508,300		88.4		2,994,662		88.3		513,638		17.2
Certificate of deposit accounts	460,635		11.6		398,398		11.7		62,237		15.6
Total deposits	$	3,968,935	100.0	%	$	3,393,060	100.0	%	$	575,875	17.0

Borrowings may be used on a short-term basis to compensate for reductions in other sources of funds (such as deposit inflows at less than projected levels). Borrowings may also be used on a longer-term basis to support expanded lending activities and match the maturity of repricing intervals of assets. The Bank is utilizing securities sold under agreement to repurchase as a supplement to its funding sources. Our repurchase agreements are secured by available for sale investment securities. At June 30, 2018, the Bank had securities sold under agreement to repurchase of $22.2 million, a decrease of $9.7 million, or 30.3%, from $31.8 million at December 31, 2017. The decrease was the result of customer activity during the period.

The Company also has junior subordinated debentures with a par value of $25.0 million which pay quarterly interest based on three-month LIBOR plus 1.56%. The debentures mature in 2037. The balance of the junior subordinated debentures was $20.2 million at June 30, 2018, which reflects the fair value of the junior subordinated debentures established during the Washington Banking Merger, adjusted for the accretion of discount from purchase accounting fair value adjustment.

At June 30, 2018, the Bank maintained credit facilities with the FHLB of Des Moines for $838.1 million and credit facilities with the Federal Reserve Bank for $58.1 million. The Company had FHLB advances outstanding of $75.5 million and $92.5 million at June 30, 2018 and December 31, 2017, respectively. The average cost of the FHLB advances during the six months ended June 30, 2018 and 2017 was1.93% and 0.86%, respectively. The Bank also maintains lines of credit with four correspondent banks to purchase federal funds totaling $90.0 million as of June 30, 2018. There were no federal funds purchased as of June 30, 2018 or December 31, 2017.

Liquidity and Cash Flows

Our primary sources of funds are customer and local government deposits, loan principal and interest payments, loan sales and interest earned on and proceeds from sales and maturities of investment securities. These funds, together with retained earnings, equity and other borrowed funds, are used to make loans, acquire investment securities and other assets, and fund continuing operations. While maturities and scheduled amortization of loans are a predictable source of funds, deposit flows and loan prepayments are greatly influenced by the level of interest rates, economic conditions and competition.

Heritage Bank: The principal objective of the Bank’s liquidity management program is to maintain the ability to meet day-to-day cash flow requirements of its customers who either wish to withdraw funds or to draw upon credit facilities to meet their cash needs. The Bank monitors the sources and uses of funds on a daily basis to maintain an acceptable liquidity position. In addition to liquidity from core deposits and the repayment and maturities of loans, the Bank can utilize established credit facilities and lines with correspondent banks or sale of investment securities.

Heritage Financial Corporation: The Company is a separate legal entity from the Bank and must provide for its own liquidity. Substantially all of the Company’s revenues are obtained from dividends declared and paid by the Bank. There are statutory and regulatory provisions that could limit the ability of the Bank to pay dividends to the Company. However, management believes that such restrictions will not have an adverse impact on the ability of the

69

Company to meets its ongoing cash obligations. At June 30, 2018, the Company (on an unconsolidated basis) had cash and cash equivalents of $14.0 million.

We are required to maintain an adequate level of liquidity to ensure the availability of sufficient funds to fund loan originations and deposit withdrawals, satisfy other financial commitments and fund operations. We generally maintain sufficient cash and short-term investments to meet short-term liquidity needs. At June 30, 2018, cash and cash equivalents totaled $129.9 million, or 2.7% of total assets. The fair value of investment securities available for sale totaled $873.7 million at June 30, 2018, of which $257.9 million were pledged to secure public deposits or borrowing arrangements. The fair value of investment securities available for sale that were not pledged totaled $615.8 million, or 12.9%, of total assets at June 30, 2018. The fair value of investment securities available for sale with maturities of one year or less were $24.7 million, or 0.5%, of total assets at June 30, 2018.

Consolidated Cash Flows: As disclosed in the Condensed Consolidated Statements of Cash Flows, net cash provided by operating activities was $29.7 million for the six months ended June 30, 2018, and primarily consisted of net income of $20.9 million. During the six months ended June 30, 2018, net cash used in investing activities was $34.3 million, which consisted primarily of net loan originations of $96.1 million and purchases of premises and equipment of $16.7 million, offset partially by net cash received from acquisitions of $80.1 million. Net cash provided by financing activities was $31.4 million for the six months ended June 30, 2018, and primarily consisted of net increase in deposits of $70.0 million during the period, partially offset by net FHLB repayments of $17.0 million and dividends paid of $10.2 million.

Capital and Capital Requirements

Stockholders’ equity at June 30, 2018 was $639.5 million compared to $508.3 million at December 31, 2017. The changes to stockholders' equity during the six months ended June 30, 2018 is as follows:

	Six Months Ended
	June 30, 2018
	(In Thousands)
Balance, beginning of period	$	508,305
Common stock issued in the Puget Sound Merger	130,770
Net income	20,944
Dividends declared	(10,247		)
Accumulated other comprehensive loss	(9,915		)
Other	(334		)
Balance, end of period	$	639,523

The Company has historically paid cash dividends to its common shareholders. Payments of future cash dividends, if any, will be at the discretion of our board of directors after taking into account various factors, including our business, operating results and financial condition, capital requirements, current and anticipated cash needs, plans for expansion, any legal or contractual limitation on our ability to pay dividends and other relevant factors. Dividends on common stock from the Company depend substantially upon receipt of dividends from the Bank, which is the Company’s predominant source of income. On July 24, 2018, the Company’s Board of Directors declared a regular dividend of $0.15 per common share payable on August 23, 2018 to shareholders of record on August 9, 2018.

The Company is a bank holding company under the supervision of the Federal Reserve Bank. Bank holding companies are subject to capital adequacy requirements of the Federal Reserve under the Bank Holding Company Act of 1956, as amended, and the regulations of the Federal Reserve. Heritage Bank is a federally insured institution and thereby is subject to the capital requirements established by the FDIC. The Federal Reserve capital requirements generally parallel the FDIC requirements. Failure to meet minimum capital requirements can initiate certain mandatory, and possibly additional discretionary, actions by regulators that, if undertaken, could have a direct material effect on the Company’s consolidated financial statements and operations. Management believes as of June 30, 2018, the Company and the Bank meet all capital adequacy requirements to which they are subject.

As of June 30, 2018 and December 31, 2017, the most recent regulatory notifications categorized the Bank as well capitalized under the regulatory framework for prompt corrective action. There are no conditions or events since that notification that management believes have changed the Bank's categories.

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	Minimum Requirements				Well-Capitalized Requirements				Actual
	(Dollars in thousands)
As of June 30, 2018:
The Company consolidated
Common equity Tier 1 capital to risk-weighted assets	$	180,827	4.5	%	N/A		N/A		$	450,777	11.2	%
Tier 1 leverage capital to average assets	180,474		4.0		N/A		N/A		470,933		10.4
Tier 1 capital to risk-weighted assets	241,103		6.0		N/A		N/A		470,933		11.7
Total capital to risk-weighted assets	321,471		8.0		N/A		N/A		505,184		12.6
Heritage Bank
Common equity Tier 1 capital to risk-weighted assets	180,660		4.5		$	260,953	6.5	%	454,393		11.3
Tier 1 leverage capital to average assets	181,505		4.0		226,881		5.0		454,393		10.0
Tier 1 capital to risk-weighted assets	240,880		6.0		321,173		8.0		454,393		11.3
Total capital to risk-weighted assets	321,173		8.0		401,466		10.0		488,644		12.2
As of December 31, 2017:
The Company consolidated
Common equity Tier 1 capital to risk-weighted assets	$	154,522	4.5	%	N/A		N/A		$	386,689	11.3	%
Tier 1 leverage capital to average assets	159,494		4.0		N/A		N/A		406,687		10.2
Tier 1 capital to risk-weighted assets	206,029		6.0		N/A		N/A		406,687		11.8
Total capital to risk-weighted assets	274,706		8.0		N/A		N/A		439,044		12.8
Heritage Bank
Common equity Tier 1 capital to risk-weighted assets	154,400		4.5		$	223,023	6.5	%	391,092		11.4
Tier 1 leverage capital to average assets	159,300		4.0		199,125		5.0		391,092		9.8
Tier 1 capital to risk-weighted assets	205,867		6.0		274,490		8.0		391,092		11.4
Total capital to risk-weighted assets	274,490		8.0		343,112		10.0		423,348		12.3

Effective January 1, 2015 (with some changes transitioned into full effectiveness over two to four years), the Company became subject to new capital adequacy requirements approved by the Federal Reserve and the FDIC that implement the revised standards of the Basel Committee on Banking Supervision, commonly called Basel III, and address relevant provisions of the Dodd-Frank Act.

Under the new capital requirements both the Company and the Bank are required to have a common equity Tier 1 capital ratio of 4.5%. In addition, both the Company and the Bank are required to have a Tier 1 leverage ratio of 4.0%, a Tier 1 risk-based ratio of 6.0% and a total risk-based ratio of 8.0%. Both the Company and the Bank are required to establish a “conservation buffer”, consisting of common equity Tier 1 capital of more than 2.5% above the minimum risk-based capital ratios. The capital conservation buffer is designed to ensure that banks build up capital buffers outside periods of stress which can be drawn down as losses are incurred. An institution that does not meet the conservation buffer will be subject to restrictions on certain activities including payment of dividends, stock repurchases and discretionary bonuses to executive officers. The conservation buffer is being phased in beginning in 2016 and will take full effect on January 1, 2019. Certain calculations under the rules will also have phase-in periods. The capital conservation buffer requirement began to be phased-in on January 1, 2016 when more than 0.625% of risk-weighted assets was required, and increases by 0.625% on each subsequent January 1, until it is fully phased-in on January 1, 2019. At June 30, 2018, the capital conservation buffer was 4.57% and 4.17% for the Company and the Bank, respectively.

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ITEM 3.     QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

We are exposed to interest rate risk through our lending and deposit gathering activities. Our results of operations are highly dependent upon our ability to manage interest rate risk. We consider interest rate risk to be a significant market risk that could have a material effect on our financial condition and results of operations. Interest rate risk is measured and assessed on a quarterly basis. In our opinion, there has not been a material change in our interest rate risk exposure since the information disclosed in our Annual Report on Form 10-K for the year ended December 31, 2017.

Neither we, nor the Bank, maintain a trading account for any class of financial instrument, nor do we, or the Bank, engage in hedging activities or purchase high risk derivative instruments. Moreover, neither we, nor the Bank, are subject to foreign currency exchange rate risk or commodity price risk.

ITEM 4.     CONTROLS AND PROCEDURES

(a) Evaluation of Disclosure Controls and Procedures

An evaluation of the Company’s disclosure controls and procedure (as defined in Section 13a-15(e) or 15d-15(e) of the Securities Exchange Act of 1934 (the “Act”)) was carried out under the supervision and with the participation of the Company’s Chief Executive Officer, Chief Financial Officer and the Company’s Disclosure Committee as of the end of the period covered by this quarterly report. In designing and evaluating the Company’s disclosure controls and procedures, management recognized that disclosure controls and procedures, no matter how well conceived and operated, can provide only reasonable, not absolute, assurance that the objectives of the disclosure controls and procedures are met. Additionally, in designing disclosure controls and procedures, management necessarily was required to apply its judgment in evaluating the cost-benefit relationship of possible disclosure controls and procedures. The design of any disclosure controls and procedures also is based in part upon certain assumptions about the likelihood of future events, and there can be no assurance that any design will succeed in achieving its stated goals under all potential future conditions. Based on their evaluation, the Company’s Chief Executive Officer and Chief Financial Officer concluded that the Company’s disclosure controls and procedures as of June 30, 2018 are effective in ensuring that the information required to be disclosed by the Company in the reports it files or submits under the Act is (i) accumulated and communicated to the Company’s management (including the Chief Executive Officer and Chief Financial Officer) in a timely manner, and (ii) recorded, processed, summarized and reported within the time periods specified in the SEC’s rules and forms.

(b) Changes in Internal Control Over Financial Reporting

There have been no changes in the Company’s internal control over financial reporting (as defined in Rule 13a-15(f) of the Act) that occurred during the quarter ended June 30, 2018, that have materially affected, or are reasonably likely to materially affect, the Company’s internal control over financial reporting. The Company does not expect that its internal control over financial reporting will prevent all error and all fraud. A control procedure, no matter how well conceived and operated, can provide only reasonable, not absolute, assurance that the objectives of the control procedure are met. Because of the inherent limitations in all control procedures, no evaluation of controls can provide absolute assurance that all control issues and instances of fraud, if any, within the Company have been detected. These inherent limitations include the realities that judgments in decision-making can be faulty, and that breakdowns can occur because of simple error or mistake. Additionally, controls can be circumvented by the individual acts of some persons, by collusion of two or more people, or by management override of the control. The design of any control procedure also is based in part upon certain assumptions about the likelihood of future events, and there can be no assurance that any design will succeed in achieving its stated goals under all potential future conditions; over time, controls may become inadequate because of changes in conditions, or the degree of compliance with the policies or procedures may deteriorate. Because of the inherent limitations in a cost-effective control procedure, misstatements due to error or fraud may occur and not be detected.

PART II.    OTHER INFORMATION

ITEM 1.     LEGAL PROCEEDINGS

We, and our Bank, are not a party to any material pending legal proceedings other than ordinary routine litigation incidental to the business of the Bank.

ITEM 1A.     RISK FACTORS

There have been no material changes to the risk factors set forth in Part I. Item 1A of the Company’s Annual Report on Form 10-K for the year ended December 31, 2017.

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ITEM 2.     UNREGISTERED SALES OF EQUITY SECURITIES AND USE OF PROCEEDS

(a) Not applicable.

(b) Not applicable.

(c) Repurchase Plans

The Company has had various stock repurchase programs since March 1999. On October 23, 2014, the Company's Board of Directors authorized the repurchase of up to 5% of the Company's outstanding common shares, or approximately 1,513,000 shares, under the eleventh stock repurchase plan. The number, timing and price of shares repurchased will depend on business and market conditions and other factors, including opportunities to deploy the Company's capital.

Since the inception of the eleventh plan, the Company has repurchased 579,996 shares at an average share prices of $16.67. No shares were repurchased under this plan during the six months ended June 30, 2018 and 2017.

In addition to the stock repurchases under a plan, the Company repurchases shares to pay withholding taxes on the vesting of restricted stock awards and units. The following table provides total repurchased shares for the periods indicated:

	Three Months Ended June 30,				Six Months Ended June 30,
	2018		2017		2018		2017
Repurchased shares to pay withholding taxes (1)	7,394		11,476		52,820		27,367
Stock repurchase to pay withholding taxes average share price	$	33.84	$	25.50	$	31.96	$	24.60

⁽¹⁾ During the three and six months ended June 30, 2018, 26,741 of the shares repurchased related to the withholding taxes due on the accelerated vesting of the restricted stock units of Puget Sound which were converted to Heritage common stock shares with an average share price of $31.80 under the terms of the merger agreement.

The following table sets forth information about the Company’s purchases of its outstanding common stock during the quarter ended June 30, 2018.

Period	Total Number  of Shares  Purchased(1)	Average Price Paid Per  Share(1)		Total Number of  Shares Purchased as  Part of Publicly Announced Plans or Programs (2)	Maximum Number  of Shares that May Yet Be Purchased Under the Plans or Programs
April 1, 2018— April 30, 2018	—	$	—	7,893,389	935,034
May 1, 2018— May 31, 2018	—	—		7,893,389	935,034
June 1, 2018— June 30, 2018	7,394	33.84		7,893,389	935,034
Total	7,394	$	33.84

⁽¹⁾ All of the common shares repurchased by the Company between April 1, 2018 and June 30, 2018 represented the cancellation of stock to pay withholding taxes on vested restricted stock awards or units.

⁽²⁾ Represents cumulative life-to-date shares repurchased.

ITEM 3.     DEFAULTS UPON SENIOR SECURITIES

None

ITEM 4.     MINE SAFETY DISCLOSURES

Not applicable

ITEM 5.        OTHER INFORMATION

None

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ITEM 6.     EXHIBITS

		Incorporated by Reference
Exhibit No.	Description of Exhibit	Form	Exhibit	Filing Date/Period End Date
2.5	Agreement and Plan of Merger with Puget Sound Bancorp, Inc	8-K	2.1	7/27/2017
2.6	Agreement and Plan of Merger with Premier Commercial Bancorp, Inc	8-K	2.1	3/9/2018
31.1	Certification of Principal Executive Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002(1)
31.2	Certification of Principal Financial Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002(1)
32.1	Certification of Principal Executive Officer and Principal Financial Officer pursuant to Section 906 of the Sarbanes-Oxley Act of 2002(1)
101.INS	XBRL Instance Document (1)
101.SCH	XBRL Taxonomy Extension Schema Document (1)
101.CAL	XBRL Taxonomy Extension Calculation Linkbase Document (1)
101.DEF	XBRL Taxonomy Extension Definition Linkbase Document (1)
101.LAB	XBRL Taxonomy Extension Label Linkbase Document (1)
101.PRE	XBRL Taxonomy Extension Presentation Linkbase Document (1)

⁽¹⁾ Filed herewith.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

	HERITAGE FINANCIAL CORPORATION
Date:
August 8, 2018	/S/ BRIAN L. VANCE
	Brian L. Vance
	Chief Executive Officer
Date:
August 8, 2018	/S/ DONALD J. HINSON
	Donald J. Hinson
	Executive Vice President and Chief Financial Officer

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EX-31.1

EXHIBIT 31.1

Certification of Principal Executive Officer

I, Brian L. Vance, certify that:

1. I have reviewed the quarterly report on Form 10-Q of Heritage Financial Corporation;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of and for the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a. designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b. designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c. evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d. disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a. all significant deficiencies and material weaknesses in the design or operation of internal controls over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b. any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

August 8, 2018

/s/ Brian L. Vance

Brian L. Vance

Chief Executive Officer

Principal Executive Officer

EX-31.2

EXHIBIT 31.2

Certification of Principal Financial Officer

I, Donald J. Hinson, certify that:

1. I have reviewed the quarterly report on Form 10-Q of Heritage Financial Corporation;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of and for the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a. designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b. designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c. evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d. disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a. all significant deficiencies and material weaknesses in the design or operation of internal controls over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b. any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

August 8, 2018

/s/ Donald J. Hinson

Donald J. Hinson

Executive Vice President and Chief Financial Officer

Principal Financial and Accounting Officer

EX-32.1

EXHIBIT 32.1

CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of Heritage Financial Corporation (the “Company”) on Form 10-Q for the quarter ended June 30, 2018 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), we, Brian L. Vance, President and Chief Executive Officer and Donald J. Hinson, Executive Vice President and Chief Financial Officer of the Company, certify in our capacity as officers of the Company, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

1. The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

2. The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company as of the dates and for the periods presented in the financial statements included in such Report.

August 8, 2018	/s/ Brian L. Vance
	Brian L. Vance
	Chief Executive Officer Principal Executive Officer
August 8, 2018	/s/ Donald J. Hinson
	Donald J. Hinson
	Executive Vice President and Chief Financial Officer Principal Financial and Accounting Officer

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Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2018	Jul. 31, 2018
Document and Entity Information [Abstract]
Entity Registrant Name	HERITAGE FINANCIAL CORP /WA/
Entity Central Index Key	0001046025
Document Type	10-Q
Document Period End Date	Jun. 30, 2018
Amendment Flag	false
Document Fiscal Year Focus	2018
Document Fiscal Period Focus	Q2
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		36,868,578

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Condensed Consolidated Statements of Financial Condition (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
ASSETS
Cash on hand and in banks	$ 94,210	$ 78,293
Interest earning deposits	35,733	24,722
Cash and cash equivalents	129,943	103,015
Investment securities available for sale, at fair value	873,670	810,530
Loans held for sale	3,598	2,288
Loans receivable, net	3,328,288	2,849,071
Allowance for loan losses	(33,972)	(32,086)
Total loans receivable, net	3,294,316	2,816,985
Other real estate owned	434	0
Premises and equipment, net	75,364	60,325
Federal Home Loan Bank stock, at cost	8,616	8,347
Bank owned life insurance	82,031	75,091
Accrued interest receivable	13,482	12,244
Prepaid expenses and other assets	104,718	99,328
Other intangible assets, net	15,767	6,088
Goodwill	187,549	119,029
Total assets	4,789,488	4,113,270
LIABILITIES AND STOCKHOLDERS' EQUITY
Deposits	3,968,935	3,393,060
Federal Home Loan Bank advances	75,500	92,500
Junior subordinated debentures	20,156	20,009
Securities sold under agreement to repurchase	22,168	31,821
Accrued expenses and other liabilities	63,206	67,575
Total liabilities	4,149,965	3,604,965
Stockholders’ equity:
Preferred stock, no par value, 2,500,000 shares authorized; no shares issued and outstanding at June 30, 2018 and December 31, 2017	0	0
Common stock, no par value, 50,000,000 shares authorized; 34,021,094 and 29,927,746 shares issued and outstanding at June 30, 2018 and December 31, 2017, respectively	491,026	360,590
Retained earnings	159,803	149,013
Accumulated other comprehensive loss, net	(11,306)	(1,298)
Total stockholders’ equity	639,523	508,305
Total liabilities and stockholders’ equity	$ 4,789,488	$ 4,113,270

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Condensed Consolidated Statements of Financial Condition (Unaudited) (Parenthetical) - $ / shares	Jun. 30, 2018	Dec. 31, 2017
Statement of Financial Position [Abstract]
Preferred stock, no par value (in usd per share)
Preferred stock, shares authorized (in shares)	2,500,000	2,500,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Common stock, no par value (in usd per share)
Common stock, shares authorized (in shares)	50,000,000	50,000,000
Common stock, shares issued (in shares)	34,021,094	29,927,746
Common stock, shares outstanding (in shares)	34,021,094	29,927,746

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Condensed Consolidated Statements of Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
INTEREST INCOME
Interest and fees on loans	$ 41,141	$ 31,500	$ 79,300	$ 61,985
Taxable interest on investment securities	4,068	3,141	7,597	6,190
Nontaxable interest on investment securities	1,220	1,304	2,561	2,572
Interest on other interest earning assets	242	96	460	143
Total interest income	46,671	36,041	89,918	70,890
INTEREST EXPENSE
Deposits	2,195	1,407	4,155	2,673
Junior subordinated debentures	315	249	598	487
Other borrowings	418	251	585	464
Total interest expense	2,928	1,907	5,338	3,624
Net interest income	43,743	34,134	84,580	67,266
Provision for loan losses	1,750	1,131	2,902	1,998
Net interest income after provision for loan losses	41,993	33,003	81,678	65,268
NONINTEREST INCOME
Service charges and other fees	4,695	4,426	9,238	8,639
Gain on sale of investment securities, net	18	117	53	117
Gain on sale of loans, net	706	4,138	1,580	5,333
Interest rate swap fees	309	282	360	415
Other income	1,845	1,746	3,890	3,568
Total noninterest income	7,573	10,709	15,121	18,072
NONINTEREST EXPENSE
Compensation and employee benefits	19,321	16,272	40,688	32,296
Occupancy and equipment	4,810	3,818	9,437	7,628
Data processing	2,507	2,002	5,112	3,917
Marketing	823	805	1,631	1,612
Professional services	3,529	1,053	6,366	2,062
State and local taxes	716	639	1,404	1,188
Federal deposit insurance premium	375	357	730	657
Other real estate owned, net	0	21	0	52
Amortization of intangible assets	796	323	1,591	647
Other expense	2,829	2,519	5,494	4,973
Total noninterest expense	35,706	27,809	72,453	55,032
Income before income taxes	13,860	15,903	24,346	28,308
Income tax expense	2,003	4,075	3,402	7,164
Net income	$ 11,857	$ 11,828	$ 20,944	$ 21,144
Basic earnings per common share (in usd per share)	$ 0.35	$ 0.40	$ 0.62	$ 0.71
Diluted earnings per common share (in usd per share)	0.35	0.40	0.62	0.71
Dividends declared per common share (in usd per share)	$ 0.15	$ 0.13	$ 0.3	$ 0.25

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Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Statement of Comprehensive Income [Abstract]
Net income	$ 11,857	$ 11,828	$ 20,944	$ 21,144
Change in fair value of investment securities available for sale, net of tax of $(630), $1,491, $(2,638) and $2,285, respectively	(2,358)	2,766	(9,874)	4,239
Reclassification adjustment for net gain from sale of investment securities available for sale included in income, net of tax of $(4), $(41), $(12) and $(41), respectively	(14)	(76)	(41)	(76)
Other comprehensive (loss) income	(2,372)	2,690	(9,915)	4,163
Comprehensive income	$ 9,485	$ 14,518	$ 11,029	$ 25,307

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Condensed Consolidated Statements of Comprehensive Income (Unaudited) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Statement of Comprehensive Income [Abstract]
Change in fair value of securities available for sale, tax	$ (630)	$ 1,491	$ (2,638)	$ 2,285
Reclassification adjustment of net gain from sale of investment securities included in income, tax	$ (4)	$ (41)	$ (12)	$ (41)

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Condensed Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Common stock	Retained earnings	Accumulated other comprehensive income (loss), net
Increase (Decrease) in Stockholders' Equity [Roll Forward]
ASU 2016-01 implementation				$ 0
Beginning balance, shares at Dec. 31, 2016		29,955,000
Beginning balance at Dec. 31, 2016	$ 481,763	$ 359,060	$ 125,309	(2,606)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Restricted stock awards forfeited, shares		(7,000)
Restricted stock awards forfeited	$ 0
Exercise of stock options (including excess tax benefits from nonqualified stock options), shares	8,372	8,000
Exercise of stock options	$ 109	$ 109
Stock-based compensation expense	1,040	$ 1,040
Common stock repurchased, shares		(28,000)
Common stock repurchased	(674)	$ (674)
Net income	21,144		21,144
Other comprehensive income, net of tax	4,163			4,163
Common stock issued in business combination	0
Cash dividends declared on common stock	(7,497)		(7,497)
Ending balance, shares at Jun. 30, 2017		29,928,000
Ending balance at Jun. 30, 2017	500,048	$ 359,535	138,956	1,557
Increase (Decrease) in Stockholders' Equity [Roll Forward]
ASU 2016-01 implementation				0
Beginning balance at Mar. 31, 2017				(1,133)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	11,828
Other comprehensive income, net of tax	2,690			2,690
Ending balance, shares at Jun. 30, 2017		29,928,000
Ending balance at Jun. 30, 2017	500,048	$ 359,535	138,956	1,557
Increase (Decrease) in Stockholders' Equity [Roll Forward]
ASU 2016-01 implementation	0		93	(93)
Beginning balance, shares at Dec. 31, 2017		29,928,000
Beginning balance at Dec. 31, 2017	508,305	$ 360,590	149,013	(1,298)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Restricted stock units vested, net of forfeitures of restricted stock awards, shares		30,000
Restricted stock units vested, net of forfeitures of restricted stock awards	$ 0
Exercise of stock options (including excess tax benefits from nonqualified stock options), shares	4,042	3,000
Exercise of stock options	$ 47	$ 47
Stock-based compensation expense	1,307	$ 1,307
Common stock repurchased, shares		(52,000)
Common stock repurchased	(1,688)	$ (1,688)
Net income	20,944		20,944
Other comprehensive income, net of tax	(9,915)			(9,915)
Common stock issued in business combination, shares		4,112,000
Common stock issued in business combination	130,770	$ 130,770
Cash dividends declared on common stock	(10,247)		(10,247)
Ending balance, shares at Jun. 30, 2018		34,021,000
Ending balance at Jun. 30, 2018	639,523	$ 491,026	159,803	(11,306)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
ASU 2016-01 implementation				0
Beginning balance at Mar. 31, 2018				(8,934)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	11,857
Other comprehensive income, net of tax	(2,372)			(2,372)
Ending balance, shares at Jun. 30, 2018		34,021,000
Ending balance at Jun. 30, 2018	$ 639,523	$ 491,026	$ 159,803	$ (11,306)

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Condensed Consolidated Statements of Stockholders' Equity (Unaudited) (Parenthetical) - $ / shares							3 Months Ended		6 Months Ended
	Apr. 25, 2018	Jan. 24, 2018	Oct. 25, 2017	Jul. 25, 2017	Apr. 25, 2017	Jan. 25, 2017	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Statement of Stockholders' Equity [Abstract]
Cash dividends declared on common stock (in usd per share)	$ 0.15	$ 0.15	$ 0.13	$ 0.13	$ 0.13	$ 0.12	$ 0.15	$ 0.13	$ 0.3	$ 0.25

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Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Cash flows from operating activities:
Net income	$ 20,944	$ 21,144
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	5,140	5,459
Changes in net deferred loan costs, net of amortization	(254)	(509)
Provision for loan losses	2,902	1,998
Net change in accrued interest receivable, prepaid expenses and other assets, accrued expenses and other liabilities	419	3,482
Stock-based compensation expense	1,307	1,040
Amortization of intangible assets	1,591	647
Origination of loans held for sale	(40,048)	(54,449)
Proceeds from sale of loans	39,962	71,436
Earnings on bank owned life insurance	(666)	(747)
Gain on sale of loans, net	(1,580)	(5,333)
Gain on sale of investment securities, net	(53)	(117)
Gain on sale of assets held for sale	0	(53)
Impairment of assets held for sale	75	0
Loss on sale or write-off of furniture, equipment and leasehold improvements	0	12
Net cash provided by operating activities	29,739	44,010
Cash flows from investing activities:
Loans originated, net of principal payments	(96,127)	(135,709)
Maturities, calls and payments of investment securities available for sale	41,436	52,461
Purchase of investment securities available for sale	(147,360)	(57,972)
Purchase of premises and equipment	(16,659)	(1,382)
Proceeds from sales of other loans	4,532	21,319
Proceeds from sales of investment securities available for sale	107,579	15,032
Proceeds from sale of assets held for sale	0	265
Proceeds from redemption of Federal Home Loan Bank stock	22,138	16,456
Purchases of Federal Home Loan Bank stock	(21,784)	(17,975)
Proceeds from sale of premises and equipment	21	0
Capital contribution to low-income housing tax credit partnership	(8,169)	(7)
Net cash received from acquisitions	80,133	0
Net cash used in investing activities	(34,260)	(107,512)
Cash flows from financing activities:
Net increase in deposits	69,990	61,602
Federal Home Loan Bank advances	536,450	442,700
Repayments of Federal Home Loan Bank advances	(553,450)	(411,400)
Common stock cash dividends paid	(10,247)	(7,497)
Net decrease in securities sold under agreement to repurchase	(9,653)	(849)
Proceeds from exercise of stock options	47	109
Repurchase of common stock	(1,688)	(674)
Net cash provided by financing activities	31,449	83,991
Net increase in cash and cash equivalents	26,928	20,489
Cash and cash equivalents at beginning of period	103,015	103,745
Cash and cash equivalents at end of period	129,943	124,234
Supplemental disclosures of cash flow information:
Cash paid for interest	5,302	3,688
Cash paid for income taxes	2,724	1,007
Supplemental non-cash disclosures of cash flow information:
Transfers of loans receivable to other real estate owned	434	32
Transfers of loans receivable to loans held for sale	0	5,779
Transfers of properties held for sale recorded in premises and equipment, net to prepaid expenses and other assets	221	2,687
Purchases of investment securities available for sale not settled	0	2,268
Business Combination:
Common stock issued for business combinations	130,770	0
Assets acquired (liabilities assumed) in acquisitions:
Investment securities available for sale	80,353	0
Loans receivable	388,462	0
Premises and equipment	732	0
Federal Home Loan Bank stock	623	0
Accrued interest receivable	1,448	0
Bank owned life insurance	6,264	0
Prepaid expenses and other assets	1,354	0
Other intangible assets	11,270	0
Deposits	(505,885)	0
Accrued expenses and other liabilities	$ (2,504)	$ 0

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Description of Business, Basis of Presentation and Significant Accounting Policies and Recently Issued Accounting Pronouncements

6 Months Ended

Jun. 30, 2018

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Description of Business, Basis of Presentation and Significant Accounting Policies and Recently Issued Accounting Pronouncements

Description of Business, Basis of Presentation, Significant Accounting Policies and Recently Issued Accounting Pronouncements

(a) Description of Business

Heritage Financial Corporation ("Heritage" or the “Company”) is a bank holding company that was incorporated in the State of Washington in August 1997. The Company is primarily engaged in the business of planning, directing and coordinating the business activities of its wholly-owned subsidiary, Heritage Bank (the “Bank”). The Bank is a Washington-chartered commercial bank and its deposits are insured by the Federal Deposit Insurance Corporation ("FDIC"). The Bank is headquartered in Olympia, Washington and conducts business from its 59 branch offices as of June 30, 2018 located throughout Washington State and the greater Portland, Oregon area. The Bank’s business consists primarily of commercial lending and deposit relationships with small businesses and their owners in its market areas and attracting deposits from the general public. The Bank also makes real estate construction and land development loans, consumer loans and originates first mortgage loans on residential properties primarily located in its market areas.

On January 16, 2018, the Company completed the acquisition of Puget Sound Bancorp, Inc. (“Puget Sound”), the holding company for Puget Sound Bank, both of Bellevue, Washington (“Puget Sound Merger”). See Note (2) Business Combination for additional information on the merger.

On March 8, 2018, the Company entered into a definitive agreement to acquire Premier Commercial Bancorp, ("Premier Commercial") and its wholly-owned bank subsidiary, Premier Community Bank, both of Hillsboro, Oregon (the "Premier Merger"). The Premier Merger was completed on July 2, 2018. See Note (17) Subsequent Event for additional information on the merger.

(b) Basis of Presentation

The accompanying unaudited Condensed Consolidated Financial Statements have been prepared in accordance with the accounting principles generally accepted in the United States (“U.S. GAAP”) for interim financial information and pursuant to the rules and regulations of the Securities and Exchange Commission ("SEC"). Accordingly, they do not include all of the information and footnotes required by U.S. GAAP for complete financial statements. It is recommended that these unaudited Condensed Consolidated Financial Statements and accompanying Notes be read with the audited Consolidated Financial Statements and the accompanying Notes included in the Company's Annual Report on Form 10-K for the year ended December 31, 2017 (“2017 Annual Form 10-K”). In management's opinion, all adjustments (consisting only of normal recurring adjustments) considered necessary for a fair presentation have been included. Operating results for the three and six months ended June 30, 2018 are not necessarily indicative of the results that may be expected for the year ending December 31, 2018. In preparing the unaudited Condensed Consolidated Financial Statements, management is required to make estimates and assumptions that affect the reported amounts of assets, liabilities, revenues, expenses and related disclosures. Management believes that the judgments, estimates and assumptions used in the preparation of the financial statements are appropriate based on the facts and circumstances at the time. Actual results, however, could differ significantly from those estimates.

(c) Significant Accounting Policies

The significant accounting policies used in preparation of the Company's Condensed Consolidated Financial Statements are disclosed in the 2017 Annual Form 10-K. There have not been any material changes in the Company's significant accounting policies from those contained in the 2017 Annual Form 10-K, except for the accounting policy relating to revenue from contracts with customers adopted January 1, 2018, as discussed below.

Revenue from Contracts with Customers

Accounting Standards Codification Topic 606, Revenue from Contracts with Customers, (“ASC 606”), as amended, was adopted by the Company on January 1, 2018. ASC 606 applies to all contracts with customers to provide goods or services in the ordinary course of business, except for contracts that are specifically excluded from its scope.  The Company's revenues are primarily composed of interest income on financial instruments, such as loans and investment securities, which are excluded from the scope of ASC 606.  Descriptions of our revenue-generating activities that are within the scope ASC 606, which are presented in Service Charges and Other Fees and Other Income on the Company’s Condensed Consolidated Statement of Income, are as follows:

• Service Charges on Deposit Accounts: The Company earns fees from its deposit customers from a variety of deposit products and services.  Non-transaction based fees such as account maintenance fees and monthly statement fees are considered to be provided to the customer under a day-to-day contract with ongoing renewals. Revenues for these non-transaction fees are earned over the course of a month, representing the period over which the Company satisfies the performance obligation.  Transaction-based fees such as non-sufficient fund charges, stop payment charges and wire fees are recognized at the time the transaction is executed as the contract duration does not extend beyond the service performed. 

• Wealth Management and Trust Services: The Company earns fees from contracts with customers for fiduciary and brokerage activities. Revenues are generally recognized on a monthly basis and are generally based on a percentage of the customer’s assets under management or based on investment or insurance solutions that are implemented for the customer.

• Merchant Processing Services and Debit and Credit Card Fees: The Company earns fees from cardholder transactions conducted through third party payment network providers which consist of (i) interchange fees earned from the payment network as a debit card issuer, (ii) referral fee income, and (iii) ongoing merchant fees earned for referring customers to the payment processing provider.  These fees are recognized when the transaction occurs, but may settle on a daily or monthly basis. 

(d) Recently Issued Accounting Pronouncements

FASB ASU 2014-09, Revenue from Contracts with Customers, (as amended by FASB ASU 2015-14; FASB ASU 2016-08; FASB ASU 2016-10 and FASB ASU 2016-12), was issued in May 2014. Under this Accounting Standard Update ("ASU" or "Update"), the Financial Accounting Standards Board ("FASB") created a new Topic 606 which is in response to a joint initiative of FASB and the International Accounting Standards Board to clarify the principles for recognizing revenue and to develop a common revenue standard for U.S. GAAP and international financial reporting standards that would:

• Remove inconsistencies and weaknesses in revenue requirements.

• Provide a more robust framework for addressing revenue issues.

• Improve comparability of revenue recognition practices across entities, industries, jurisdictions and capital markets.

• Provide more useful information to users of financial statements through improved disclosure requirements.

• Simplify the preparation of financial statements by reducing the number of requirements to which an entity must refer.

The Company adopted the revenue recognition guidance, as amended, on January 1, 2018 using the modified retrospective approach. A significant amount of the Company’s revenues are derived from interest income on financial assets, which are excluded from the scope of the amended guidance. With respect to noninterest income and related disclosures, the Company has identified and evaluated the revenue streams and underlying revenue contracts within the scope of the guidance. The Company did not identify any significant changes in the timing of revenue recognition when considering the amended accounting guidance. The adoption of the Update did not have a material impact on the Company's Condensed Consolidated Financial Statements, but the adoption did change certain disclosure requirements as described in Significant Accounting Policies above.

FASB ASU 2016-01, Recognition and Measurement of Financial Assets and Financial Liabilities (Subtopic 825-10), was issued in January 2016, to enhance the reporting model for financial instruments to provide users of financial statements with more decision-useful information. This Update contains several provisions, including but not limited to (1) requiring equity investments, with certain exceptions, to be measured at fair value with changes in fair value recognized in net income; (2) simplifying the impairment assessment of equity investments without readily determinable fair values by requiring a qualitative assessment to identify impairment; (3) eliminating the requirement to disclose the method(s) and significant assumptions used to estimate fair value; and (4) requiring separate presentation of financial assets and liabilities by measurement category and form of financial asset on the balance sheet or the accompanying notes to the financial statements. The Update also changes certain financial statement disclosure requirements, including requiring disclosures of the fair value of financial instruments be made on the basis of exit price. The Company adopted this Update effective January 1, 2018 using the cumulative catch-up transition method. This change resulted in a cumulative adjustment of $93,000 from accumulated other comprehensive loss, net to retained earnings for the unrealized gain related to the Company's equity security. The Company's processes and procedures utilized to estimate the fair value of loans receivable and certificate of deposit accounts for disclosure requirements were additionally changed due to adoption of this Update. Previously, the Company valued these items using an entry price notion. This ASU emphasized that these instruments be measured using the exit price notion; accordingly, the Company refined its calculation as part of adopting this Update. Prior period information has not been updated to conform with the new guidance. See the Condensed Consolidated Statements of Stockholders' Equity and Note (14) Fair Value Measurements.

FASB ASU 2016-02, Leases (Topic 842) was originally issued in February 2016, to increase transparency and comparability of leases among organizations and to disclose key information about leasing arrangements. The Update sets out the principles for the recognition, measurement, presentation and disclosure of leases for both lessees and lessors. The Update requires lessees to apply a dual approach, classifying leases as either a finance or operating lease. This classification will determine whether the lease expense is recognized based on an effective interest method or on a straight-line basis over the term of the lease. A lessee is also required to record a right-of-use asset and a lease liability for all leases with a term greater than 12 months regardless of their classification. All cash payments will be classified within operating activities in the statement of cash flows. In transition, lessees and lessors are required to recognize and measure leases at the beginning of the earliest period presented using a modified retrospective approach. The Update is effective for public entities for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. The Company anticipates adopting the Update on January 1, 2019. Upon adoption of the guidance, the Company expects to report increased assets and increased liabilities on its Condensed Consolidated Statements of Financial Condition as a result of recognizing right-of-use assets and lease liabilities related to certain banking offices and certain equipment under noncancelable operating lease agreements, which currently are not reflected in its Condensed Consolidated Statements of Financial Condition.  During 2017, management developed its methodology to estimate the right-of use assets and lease liabilities. The Company anticipates electing an exclusion accounting policy for lease assets and lease liabilities for leases with a term of twelve months or less. The Company was committed to $13.7 million of minimum lease payments under noncancelable operating lease agreements at June 30, 2018. The Company does not expect the adoption of this Update will have a significant impact to its Condensed Consolidated Financial Statements.

FASB ASU 2016-13, Financial Instruments: Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments, was issued in June 2016. Commonly referred to as the current expected credit loss model ("CECL"), this Update requires financial assets measured at amortized cost basis to be presented at the net amount expected to be collected. The allowance for credit losses is a valuation account that is deducted from the amortized cost basis of the financial asset to present the net carrying value at the amount expected to be collected on the financial asset. The measurement of expected credit losses is based on relevant information about past events including historical experience, current conditions and reasonable and supportable forecasts that affect the collectibility of the reported amount. The amendment affects loans, debt securities, trade receivables, net investments in leases, off-balance-sheet credit exposures, reinsurance receivables and any other financial asset not excluded from the scope that have the contractual right to receive cash. The Update replaces the incurred loss impairment methodology, which generally only considered past events and current conditions, with a methodology that reflects the expected credit losses and required consideration of a broader range of reasonable and supportable information to estimate all expected credit losses. The Update additionally addresses purchased assets and introduces the purchased financial asset with a more-than-insignificant amount of credit deterioration since origination ("PCD"). The accounting for these PCD assets is similar to the existing accounting guidance of FASB ASC 310-30, Loans and Debt Securities Acquired with Deteriorated Credit Quality, for PCI assets, except the subsequent improvements in estimated cash flows will be immediately recognized into income, similar to the immediate recognition of subsequent deteriorations in cash flows. Current guidance only allows for the prospective recognition of these cash flow improvements. Because the terminology has been changed to a "more-than-insignificant" amount of credit deterioration, the presumption is that more assets might qualify for this accounting under the Update than those under current guidance. For public business entities, the Update is effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years with early adoption permitted for fiscal years after December 15, 2018. An entity will apply the Update through a cumulative-effect adjustment to retained earnings as of the beginning of the first reporting period in which the guidance is adopted. A prospective transition approach is required for debt securities. An entity that has previously applied the guidance of FASB ASC 310-30 will prospectively apply the guidance in this Update for PCD assets. A prospective transition approach should be used for PCD assets where upon adoption, the amortized cost basis should be adjusted to reflect the addition of the allowance for credit losses. The Company is anticipating adopting the Update on January 1, 2020. Upon adoption, the Company expects a change in the processes, internal controls and procedures to calculate the allowance for loan losses, including changes in assumptions and estimates to consider expected credit losses over the life of the loan versus the current accounting practice that utilizes the incurred loss model. The new guidance may result in an increase in the allowance for loan losses which will also reflect the new requirement to include the nonaccretable principal differences on PCI loans; however, the Company is still in the process of determining the magnitude of the increase and its impact on the Condensed Consolidated Financial Statements. In addition, the current accounting policy and procedures for other-than-temporary impairment on investment securities available for sale will be replaced with an allowance approach. During 2017, the Company's management created a CECL steering committee which has begun developing and implementing processes and procedures to ensure it is fully compliant with the amendments at the adoption date. To date, the CECL steering committee has selected a vendor to assist the Company in the adoption and has completed the implementation discovery sessions. The CECL steering committee is in the process of selecting appropriate methodologies and refining key data points in an effort to complete a mock CECL model by fourth quarter 2018.

FASB ASU 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments, was issued in August 2016. The Update addresses eight specific cash flow issues with the objective of reducing the existing diversity in practice. For public business entities, the guidance was effective for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years, and must be applied using a retrospective transitional method to each period presented. The Company adopted this Update on January 1, 2018. The adoption did not have a significant impact on its Condensed Consolidated Financial Statements as cash proceeds received from the settlement of bank-owned life insurance policies and cash payments for premiums on bank-owned life insurance policies were previously classified as cash inflows and outflows, respectively, from investing activities in the Condensed Consolidated Statements of Cash Flows.

FASB ASU 2017-04, Goodwill (Topic 350), was issued in January 2017 and eliminates Step 2 from the goodwill impairment test. Under the amendments, an entity should perform its goodwill impairment test by comparing the fair value of a reporting unit with its carrying amount. An entity should recognize an impairment charge for the amount by which the carrying amount exceeds the reporting unit’s fair value. The loss recognized, however, should not exceed the total amount of goodwill allocated to that reporting unit. Additionally, an entity should consider income tax effects from any tax deductible goodwill on the carrying amount of the reporting unit when measuring the goodwill impairment loss, if applicable.  The Update is effective for annual periods or any interim goodwill impairment tests beginning after December 15, 2019 using a prospective transition method and early adoption is permitted. The Company does not expect the Update will have a material impact on its Condensed Consolidated Financial Statements.

FASB ASU 2017-08, Receivables—Nonrefundable Fees and Other Costs (Subtopic 310-20): Premium Amortization on Purchased Callable Debt Securities was issued in March 2017 and changes the accounting for certain purchased callable debt securities held at a premium to shorten the amortization period for the premium to the earliest call date rather than to the maturity date. Accounting for purchased callable debt securities held at a discount does not change. The discount would continue to amortize to the maturity date. The Update is effective for reporting periods beginning after December 15, 2018, with early adoption permitted. The Company adopted this Update in January 2018. The adoption did not have a material impact on its Condensed Consolidated Financial Statements as the Company had been accounting for premiums as prescribed under this guidance.

FASB ASU 2017-09, Compensation—Stock Compensation (Topic 718): Scope of Modification Accounting was issued in May 2017 to provide clarity as to when to apply modification accounting when there is a change in the terms or conditions of a share-based payment award. According to this Update, an entity should account for the effects of a modification unless the fair value, vesting conditions and balance sheet classification of the award is the same after the modification as compared to the original award prior to the modification. The Update was effective for reporting periods beginning after December 15, 2017. The Company adopted the Update on January 1, 2018. The adoption did not have a material impact on its Condensed Consolidated Financial Statements because no share-based payment award was modified during the six months ended June 30, 2018. The Company will apply this Update prospectively for any subsequent modifications of share-based payment awards.

FASB ASU 2018-02, Income Statement - Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income was issued to address the income tax accounting treatment of the stranded tax effects within other comprehensive income due to the prohibition of backward tracing due to an income tax rate change that was initially recorded in other comprehensive income. This issue came about from the enactment of the Tax Cuts and Jobs Act on December 22, 2017 ("Tax Cuts and Jobs Act") that changed the Company’s income tax rate from 35% to 21%. The Update changed current accounting whereby an entity may elect to reclassify the stranded tax effect from accumulated other comprehensive income to retained earnings. The Update is effective for periods beginning after December 15, 2018 although early adoption is permitted. The Company early adopted ASU 2018-02 effective December 31, 2017 and elected a portfolio policy to reclassify the stranded tax effects of the change in the federal corporate tax rate of the net unrealized gains on our available-for-sale investment securities from accumulated other comprehensive loss, net to retained earnings.

FASB ASU 2018-05, Income Taxes (Topic 740): Amendments to SEC Paragraphs Pursuant to SEC Staff Accounting Bulletin No. 118 was issued to provide guidance on the income tax accounting implications of the Tax Cuts and Jobs Act, and allows for entities to report provisional amounts for specific income tax effects of the Tax Cuts and Jobs Act for which the accounting under ASC Topic 740 was not yet complete but a reasonable estimate could be determined. A measurement period of one-year is allowed to complete the accounting effects under ASC Topic 740 and revise any previous estimates reported. Any provisional amounts or subsequent adjustments included in an entity’s financial statements during the measurement period should be included in income from continuing operations as an adjustment to tax expense in the reporting period the amounts are determined. The Company adopted this Update with the provisional adjustments as reported in the Consolidated Financial Statements on Form 10-K as of December 31, 2017. As of June 30, 2018, the Company did not incur any adjustments to the provisional recognition.

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Business Combination

6 Months Ended

Jun. 30, 2018

Business Combinations [Abstract]

Business Combination

Business Combination

On July 26, 2017, the Company, along with the Bank, and Puget Sound Bancorp, Inc. and its wholly owned subsidiary bank, Puget Sound Bank, jointly announced the signing of a definitive agreement. The Puget Sound Merger was effective on January 16, 2018. As of the acquisition date, Puget Sound merged into Heritage and Puget Sound Bank merged into Heritage Bank. The primary reason for the transaction was to create depth in the Company's geographic footprint consistent with its ongoing growth strategy, focused heavily on metro markets, and to achieve operational scale and realize efficiencies of a larger combined organization.

Pursuant to the terms of the definitive agreement, all outstanding Puget Sound restricted stock awards became immediately vested prior to the Puget Sound Merger and Puget Sound shareholders received 1.1688 shares of Heritage common stock per share of Puget Sound stock. Heritage issued an aggregate of 4,112,258 shares of its common stock based on the January 12, 2018 closing price of Heritage Common stock of $31.80 for total fair value of common shares issued of $130.8 million and paid cash of $3,000 for fractional shares in the transaction for total consideration paid of $130.8 million. Total consideration includes $851,000 representing 26,741 shares which were forfeited by the Puget Sound shareholders to pay applicable taxes.

The Puget Sound Merger resulted in $68.5 million of goodwill. This goodwill is not deductible for tax purposes.

The Puget Sound Merger constitutes a business acquisition as defined by FASB ASC 805, Business Combinations. FASB ASC 805 establishes principles and requirements for how the acquirer of a business recognizes and measures in its financial statements the identifiable assets acquired and the liabilities assumed. Heritage was considered the acquirer in this transaction. Accordingly, the preliminary estimates of fair values of the Puget Sound assets, including the identifiable intangible assets, and the assumed liabilities in the Puget Sound Merger were measured and recorded as of January 16, 2018. Fair values on the acquisition date are preliminary and represent management’s best estimates based on available information and facts and circumstances in existence on the acquisition date. Fair values are subject to refinement for up to one year after the closing date of the acquisition as additional information regarding the closing date fair values becomes available. The Company expects to finalize the purchase price allocation by the third quarter of 2018 when the valuation of tax-related matters is complete.

The preliminary fair value estimates of the assets acquired and liabilities assumed in the Puget Sound Merger were as follows:

	Puget Sound Merger
	(In thousands)
Assets
Cash and cash equivalents	$	25,889
Interest earning deposits	54,247
Investment securities available for sale	80,353
Loans receivable	388,462
Premises and equipment, net	732
Federal Home Loan Bank stock, at cost	623
Bank owned life insurance	6,264
Accrued interest receivable	1,448
Prepaid expenses and other assets	1,354
Other intangible assets	11,270
Total assets acquired	$	570,642
Liabilities
Deposits	$	505,885
Accrued expenses and other liabilities	2,504
Total liabilities acquired	$	508,389
Fair value of net assets acquired	$	62,253

A summary of the net assets purchased and the preliminary estimated fair value adjustments and resulting goodwill recognized from the Puget Sound Merger are presented in the following tables. Goodwill represents the excess of the consideration transferred over the estimated fair value of the net assets acquired and liabilities assumed.

	Puget Sound Merger
	(In thousands)
Cost basis of net assets on merger date	$	54,405
Consideration transferred	(130,773		)
Fair value adjustments:
Investment securities	(348		)
Total loans receivable, net	1,400
Premises and equipment	(121		)
Other intangible assets	9,207
Prepaid expenses and other assets	(2,282		)
Deposits	(62		)
Accrued expenses and other liabilities	54
Goodwill recognized from the Puget Sound Merger	$	(68,520	)

The operating results of the Company for the three and six months ended June 30, 2018 include the operating results produced by the net assets acquired in the Puget Sound Merger since the January 16, 2018 merger date. The Company has considered the requirement of FASB ASC 805 related to the contribution of the Puget Sound Merger to the Company’s results of operations. The table below presents only the significant results for the acquired business since the January 16, 2018 merger date:

	Three Months Ended(1)			Six Months Ended(1)
	June 30, 2018
	(In thousands)
Interest income: Interest and fees on loans(2)	$	6,130		$	10,647
Interest income: Interest and fees on investments (3)	—			59
Interest income: Other interest earning assets	25			113
Interest expense	(180		)	(324		)
Provision for loan losses for loans	(350		)	(550		)
Noninterest income	109			257
Noninterest expense (4)	(2,092		)	(7,672		)
Net effect, pre-tax	$	3,642		$	2,530

⁽¹⁾ The Puget Sound Merger was completed on January 16, 2018.

⁽²⁾ Includes the accretion of the discount on the purchased loans of $1.1 million and $1.5 million during the three and six months ended June 30, 2018, respectively.

⁽³⁾ All securities were sold with trade date of January 16, 2018 and settlement dates on or before February 14, 2018.

⁽⁴⁾ Excludes certain compensation and employee benefits for management as it is impracticable to determine due to the integration of the operations for this merger. Also includes certain merger-related costs incurred by the Company.

The Company also considered the pro forma requirements of FASB ASC 805 and deemed it not necessary to provide pro forma financial statements as required under the standard as the Puget Sound Merger is not material to the Company. The Company believes that the historical Puget Sound operating results are not considered of enough significance to be meaningful to the Company’s results of operations.

During the three and six months ended June 30, 2018, the Company incurred acquisition-related costs of approximately $551,000 and $5.0 million, respectively, related to the Puget Sound Merger.

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Investment Securities

6 Months Ended

Jun. 30, 2018

Investments, Debt and Equity Securities [Abstract]

Investment Securities

Investment Securities

As a result of the adoption of ASU 2016-01 on January 1, 2018, equity investments (except for investments accounted for under the equity method of accounting) are now measured at fair value, with changes in fair value recognized in earnings. These investments were previously measured at fair value, with changes in fair value recognized in accumulated other comprehensive loss. Accordingly, these securities are no longer classified as investment securities available-for-sale and their presentation is not comparable to the presentation as of December 31, 2017. See Note (1) Description of Business, Basis of Presentation, Significant Accounting Policies and Recently Issued Accounting Pronouncements, as well as Equity Securities section discussed below.

Available for sale investment securities

(a) Securities by Type and Maturity

The amortized cost, gross unrealized gains, gross unrealized losses and fair values of investment securities available for sale at the dates indicated were as follows:

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
	(In thousands)
June 30, 2018
U.S. Treasury and U.S. Government-sponsored agencies	$	52,256	$	42	$	(234	)	$	52,064
Municipal securities	202,918		1,366		(1,262		)	203,022
Mortgage-backed securities and collateralized mortgage obligations(1):
Residential	319,492		352		(7,722		)	312,122
Commercial	257,858		141		(7,778		)	250,221
Collateralized loan obligations	2,253		3		—			2,256
Corporate obligations	25,617		153		(80		)	25,690
Other asset-backed securities	27,603		692		—			28,295
Total	$	887,997	$	2,749	$	(17,076	)	$	873,670
December 31, 2017
U.S. Treasury and U.S. Government-sponsored agencies	$	13,460	$	6	$	(24	)	$	13,442
Municipal securities	247,358		3,720		(1,063		)	250,015
Mortgage-backed securities and collateralized mortgage obligations(1):
Residential	282,724		422		(2,935		)	280,211
Commercial	219,696		444		(3,061		)	217,079
Collateralized loan obligations	4,561		19		—			4,580
Corporate obligations	16,594		220		(44		)	16,770
Other securities (2)	27,781		652		—			28,433
Total	$	812,174	$	5,483	$	(7,127	)	$	810,530

⁽¹⁾  Issued and guaranteed by U.S. Government-sponsored agencies.

⁽²⁾  Primarily asset-backed securities.

There were no securities classified as trading or held to maturity at June 30, 2018 or December 31, 2017.

The amortized cost and fair value of investment securities available for sale at June 30, 2018, by contractual maturity, are set forth below. Actual maturities may differ from contractual maturities because certain borrowers have the right to call or prepay obligations with or without call or prepayment penalties.

	Amortized Cost		Fair Value
	(In thousands)
Due in one year or less	$	24,656	$	24,690
Due after one year through five years	149,590		148,197
Due after five years through ten years	254,873		248,759
Due after ten years	458,878		452,024
Total	$	887,997	$	873,670

(b) Unrealized Losses and Other-Than-Temporary Impairments

The following table shows the gross unrealized losses and fair value of the Company's investment securities available for sale that are not deemed to be other-than-temporarily impaired, aggregated by investment category and length of time that the individual securities have been in continuous unrealized loss positions as of June 30, 2018 and December 31, 2017:

	Less than 12 Months					12 Months or Longer					Total
	Fair Value		Unrealized Losses			Fair Value		Unrealized Losses			Fair Value		Unrealized Losses
	(In thousands)
June 30, 2018
U.S. Treasury and U.S. Government-sponsored agencies	$	34,674	$	(223	)	$	536	$	(11	)	$	35,210	$	(234	)
Municipal securities	63,443		(552		)	22,903		(710		)	86,346		(1,262		)
Mortgage-backed securities and collateralized mortgage obligations(1):
Residential	178,865		(3,954		)	78,330		(3,768		)	257,195		(7,722		)
Commercial	128,298		(3,058		)	94,847		(4,720		)	223,145		(7,778		)
Corporate obligations	15,482		(80		)	—		—			15,482		(80		)
Total	$	420,762	$	(7,867	)	$	196,616	$	(9,209	)	$	617,378	$	(17,076	)
December 31, 2017
U.S. Treasury and U.S. Government-sponsored agencies	$	11,436	$	(24	)	$	—	$	—		$	11,436	$	(24	)
Municipal securities	39,298		(384		)	26,509		(679		)	65,807		(1,063		)
Mortgage-backed securities and collateralized mortgage obligations(1):
Residential	175,847		(1,296		)	66,380		(1,639		)	242,227		(2,935		)
Commercial	75,121		(700		)	90,822		(2,361		)	165,943		(3,061		)
Corporate obligations	3,472		(44		)	—		—			3,472		(44		)
Total	$	305,174	$	(2,448	)	$	183,711	$	(4,679	)	$	488,885	$	(7,127	)

⁽¹⁾ Issued and guaranteed by U.S. Government-sponsored agencies.

The Company has evaluated these investment securities available for sale as of June 30, 2018 and December 31, 2017 and has determined that the decline in their value is not other-than-temporary. The unrealized losses are primarily due to increases in market interest rates. The fair value of these securities is expected to recover as the securities approach their maturity date. None of the underlying issuers of the municipal securities and corporate obligations had credit ratings that were below investment grade levels at June 30, 2018 or December 31, 2017. The Company has the ability and intent to hold the investments until recovery of the securities' amortized cost, which may be the maturity date of the securities.

For the three and six months ended June 30, 2018 and 2017, there were no other-than-temporary charges recorded to net income.

(c) Realized Gains and Losses

The following table presents the gross realized gains and losses on the sale of securities available for sale for the three and six months ended June 30, 2018 and 2017.

	Three Months Ended June 30,				Six Months Ended June 30,
	2018		2017		2018			2017
	(In thousands)
Gross realized gains	$	18	$	117	$	122		$	117
Gross realized losses	—		—		(69		)	—
Net realized gains	$	18	$	117	$	53		$	117

(d) Pledged Securities

The following table summarizes the amortized cost and fair value of investment securities available for sale that are pledged as collateral for the following obligations at June 30, 2018 and December 31, 2017:

	June 30, 2018				December 31, 2017
	Amortized Cost		Fair Value		Amortized Cost		Fair Value
	(In thousands)
Washington and Oregon state to secure public deposits	$	197,047	$	193,946	$	206,377	$	206,425
Repurchase agreements	45,463		44,207		48,750		48,237
Other securities pledged	20,048		19,742		12,484		12,498
Total	$	262,558	$	257,895	$	267,611	$	267,160

Equity Securities

The Company holds an equity security with a readily determinable fair value of $162,000 and $146,000 as of June 30, 2018 and December 31, 2017, respectively. As a result of the adoption of ASU 2016-01, this security is no longer classified as investment security available for sale and has been reclassified to prepaid expenses and other assets on the Company's Condensed Consolidated Statements of Financial Condition as of June 30, 2018. As such, its presentation is not comparable to the presentation as of December 31, 2017. The Company recorded the tax-effected unrealized gain on the equity security through an adjustment to accumulated other comprehensive loss, net and retained earnings in the Condensed Consolidated Statement of Stockholders' Equity during the six months ended June 30, 2018.

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Loans Receivable

6 Months Ended

Jun. 30, 2018

Loans and Leases Receivable Disclosure [Abstract]

Loans Receivable

Loans Receivable

The Company originates loans in the ordinary course of business and has also acquired loans through FDIC-assisted and open bank transactions. Disclosures related to the Company's recorded investment in loans receivable generally exclude accrued interest receivable and net deferred fees or costs because they are insignificant.

Loans acquired in a business combination are further classified as “purchased” loans. Loans purchased with evidence of credit deterioration since origination for which it is probable that not all contractually required payments will be collected are accounted for under FASB ASC 310-30, Loans and Debt Securities Acquired with Deteriorated Credit Quality. These loans are identified as "PCI" loans. Loans purchased that are not accounted for under FASB ASC 310-30 are accounted for under FASB ASC 310-20, Receivables—Nonrefundable Fees and Other Costs, and are referred to as "non-PCI" loans.

(a) Loan Origination/Risk Management

The Company categorizes loans in one of the four segments of the total loan portfolio: commercial business, one-to-four family residential, real estate construction and land development and consumer. Within these segments are classes of loans for which management monitors and assesses credit risk in the loan portfolios. The Company has certain lending policies and procedures in place that are designed to maximize loan income within an acceptable level of risk. Management reviews and approves these policies and procedures on a regular basis. A reporting system supplements the review process by providing management with frequent reports related to loan production, loan quality, concentrations of credit, loan delinquencies and nonperforming and criticized loans. The Company also conducts internal loan reviews and validates the credit risk assessment on a periodic basis and presents the results of these reviews to management. The loan review process complements and reinforces the risk identification and assessment decisions made by loan officers and credit personnel, as well as the Company’s policies and procedures.

A discussion of the risk characteristics of each loan portfolio segment is as follows:

Commercial Business:

There are three significant classes of loans in the commercial business portfolio segment: commercial and industrial, owner-occupied commercial real estate and non-owner occupied commercial real estate. The owner and non-owner occupied commercial real estate classes are both considered commercial real estate loans. As the commercial and industrial loans carry different risk characteristics than the commercial real estate loans, they are discussed separately below.

Commercial and industrial. Commercial and industrial loans are primarily made based on the identified cash flows of the borrower and secondarily on the underlying collateral provided by the borrower. The cash flows of borrowers, however, may not be as expected and the collateral securing these loans may fluctuate in value. Most commercial and industrial loans are secured by the assets being financed or other business assets such as accounts receivable or inventory and may include a personal guarantee; however, some short-term loans may be made on an unsecured basis. In the case of loans secured by accounts receivable, the availability of funds for the repayment of these loans may be substantially dependent on the ability of the borrower to collect amounts due from its customers. Commercial and industrial loans carry more risk than other loans because the borrowers’ cash flow is less predictable, and in the event of a default, the amount of loss is potentially greater and more difficult to quantify because the value of the collateral securing these loans may fluctuate, may be uncollectible, or may be obsolete or of limited use, among other things.

Commercial real estate. The Company originates commercial real estate loans primarily within its primary market areas. These loans are subject to underwriting standards and processes similar to commercial and industrial loans in that these loans are viewed primarily as cash flow loans and secondarily as loans secured by real estate properties. Commercial real estate lending typically involves higher loan principal amounts and payments on loans, and repayment is dependent on successful operation and management of the properties. The value of the real estate securing these loans can be adversely affected by conditions in the real estate market or the economy. There is little difference in risk between owner-occupied commercial real estate loans and non-owner occupied commercial real estate loans.

One-to-Four Family Residential:

The majority of the Company’s one-to-four family residential loans are secured by single-family residences located in its primary market areas. The Company’s underwriting standards require that single-family portfolio loans generally are owner-occupied and do not exceed 80% of the lower of appraised value at origination or cost of the underlying collateral. Terms of maturity typically range from 15 to 30 years. The Company sells most of its single-family loans in the secondary market and retains a smaller portion in its loan portfolio.

Real Estate Construction and Land Development:

The Company originates construction loans for one-to-four family residential and for five or more family residential and commercial properties. The one-to-four family residential construction loans generally include construction of custom homes whereby the home buyer is the borrower. The Company also provides financing to builders for the construction of pre-sold homes and, in selected cases, to builders for the construction of speculative residential property. Substantially all construction loans are short-term in nature and priced with variable rates of interest. Construction lending can involve a higher level of risk than other types of lending because funds are advanced partially based upon the value of the project, which is uncertain prior to the project’s completion. Because of the uncertainties inherent in estimating construction costs as well as the market value of a completed project and the effects of governmental regulation of real property, the Company’s estimates with regard to the total funds required to complete a project and the related loan-to-value ratio may vary from actual results. As a result, construction loans often involve the disbursement of substantial funds with repayment dependent, in part, on the success of the ultimate project and the ability of the borrower to sell or lease the property or refinance the indebtedness. If the Company’s estimate of the value of a project at completion proves to be overstated, it may have inadequate security for repayment of the loan and may incur a loss if the borrower does not repay the loan. Sources of repayment for these types of loans may be pre-committed permanent loans from approved long-term lenders, sales of developed property or an interim loan commitment from the Company until permanent financing is obtained. These loans are closely monitored by on-site inspections and are considered to have higher risks than other real estate loans due to their ultimate repayment being dependent upon successful completion of the construction project, interest rate changes, government regulation of real property, general economic conditions and the availability of long-term financing.

Consumer:

The Company originates consumer loans and lines of credit that are both secured and unsecured. The underwriting process for these loans ensures a qualifying primary and secondary source of repayment. Underwriting standards for home equity loans are significantly influenced by statutory requirements, which include, but are not limited to, a maximum loan-to-value percentage of 80%, collection remedies, the number of such loans a borrower can have at one time and documentation requirements. To monitor and manage consumer loan risk, policies and procedures are developed and modified, as needed. The majority of consumer loans are for relatively small amounts disbursed among many individual borrowers which reduces the credit risk for this type of loan. To further reduce the risk, trend reports are reviewed by management on a regular basis.

The Company also originates indirect consumer loans. These loans are for new and used automobile and recreational vehicles that are originated indirectly by selected dealers located in the Company's market areas. The Company has limited its purchase of indirect loans primarily to dealerships that are established and well-known in their market areas and to applicants that are not classified as sub-prime.

Loans receivable at June 30, 2018 and December 31, 2017 consisted of the following portfolio segments and classes:

	June 30, 2018			December 31, 2017
	(In thousands)
Commercial business:
Commercial and industrial	$	800,043		$	645,396
Owner-occupied commercial real estate	693,330			622,150
Non-owner occupied commercial real estate	1,187,548			986,594
Total commercial business	2,680,921			2,254,140
One-to-four family residential	92,518			86,997
Real estate construction and land development:
One-to-four family residential	71,934			51,985
Five or more family residential and commercial properties	93,315			97,499
Total real estate construction and land development	165,249			149,484
Consumer	385,987			355,091
Gross loans receivable	3,324,675			2,845,712
Net deferred loan costs	3,613			3,359
Loans receivable, net	3,328,288			2,849,071
Allowance for loan losses	(33,972		)	(32,086		)
Total loans receivable, net	$	3,294,316		$	2,816,985

(b) Concentrations of Credit

Most of the Company’s lending activity occurs within its primary market areas which are concentrated along the I-5 corridor from Whatcom County to Clark County in Washington State and Multnomah County in Oregon, as well as other contiguous markets. The majority of the Company’s loan portfolio consists of (in order of balances at June 30, 2018) non-owner occupied commercial real estate, commercial and industrial and owner-occupied commercial real estate. As of June 30, 2018 and December 31, 2017, there were no concentrations of loans related to any single industry in excess of 10% of the Company’s total loans.

(c) Credit Quality Indicators

As part of the on-going monitoring of the credit quality of the Company’s loan portfolio, management tracks certain credit quality indicators including trends related to (i) the risk grade of the loans, (ii) the level of classified loans, (iii) net charge-offs, (iv) nonperforming loans and (v) the general economic conditions of the United States of America, and specifically the states of Washington and Oregon. The Company utilizes a risk grading matrix to assign a risk grade to each of its loans. Loans are graded on a scale of 1 to 10. A description of the general characteristics of the risk grades is as follows:

• Grades 1 to 5: These grades are considered “pass grade” and include loans with negligible to above average but acceptable risk. These borrowers generally have strong to acceptable capital levels and consistent earnings and debt service capacity. Loans with the higher grades within the “pass” category may include borrowers who are experiencing unusual operating difficulties, but have acceptable payment performance to date. Increased monitoring of financial information and/or collateral may be appropriate. Loans with this grade show no immediate loss exposure.

• Grade 6: This grade includes "Watch" loans and is considered a “pass grade”. The grade is intended to be utilized on a temporary basis for pass grade borrowers where a potentially significant risk-modifying action is anticipated in the near term.

• Grade 7: This grade includes “Other Assets Especially Mentioned” (“OAEM”) loans in accordance with regulatory guidelines and is intended to highlight loans with elevated risks. Loans with this grade show signs of deteriorating profits and capital, and the borrower might not be strong enough to sustain a major setback. The borrower is typically higher than normally leveraged, and outside support might be modest and likely illiquid. The loan is at risk of further decline unless active measures are taken to correct the situation.

• Grade 8: This grade includes “Substandard” loans in accordance with regulatory guidelines, which the Company has determined have a high credit risk. These loans also have well-defined weaknesses which make payment default or principal exposure likely, but not yet certain. The borrower may have shown serious negative trends in financial ratios and performance. Such loans may be dependent upon collateral liquidation, a secondary source of repayment or an event outside of the normal course of business. Loans with this grade can be placed on accrual or nonaccrual status based on the Company’s accrual policy.

• Grade 9: This grade includes “Doubtful” loans in accordance with regulatory guidelines, and the Company has determined these loans to have excessive credit risk. Such loans are placed on nonaccrual status and may be dependent upon collateral having a value that is difficult to determine or upon some near-term event which lacks certainty. Additionally, these loans generally have a specific valuation allowance or have been partially charged-off for the amount considered uncollectible.

• Grade 10: This grade includes “Loss” loans in accordance with regulatory guidelines, and the Company has determined these loans have the highest risk of loss. Such loans are charged-off or charged-down when payment is acknowledged to be uncertain or when the timing or value of payments cannot be determined. “Loss” is not intended to imply that the loan or some portion of it will never be paid, nor does it in any way imply that there has been a forgiveness of debt.

Numerical loan grades for loans are established at the origination of the loan. Loan grades are reviewed on a quarterly basis, or more frequently if necessary, by the credit department. The Bank follows the FDIC’s Uniform Retail Credit Classification and Account Management Policy for subsequent classification in the event of payment delinquencies or default. Typically, an individual loan grade will not be changed from the prior period unless there is a specific indication of credit deterioration or improvement. Credit deterioration is evidenced by delinquency, direct communications with the borrower, or other borrower information that becomes known to management. Credit improvements are evidenced by known facts regarding the borrower or the collateral property.

The loan grades relate to the likelihood of losses in that the higher the grade, the greater the loss potential. Loans with a pass grade may have some estimated inherent losses, but to a lesser extent than the other loan grades. The OAEM loan grade is transitory in that the Company is waiting on additional information to determine the likelihood and extent of the potential loss. The likelihood of loss for OAEM graded loans, however, is greater than Watch graded loans because there has been measurable credit deterioration. Loans with a Substandard grade are generally loans for which the Company has individually analyzed for potential impairment. For Doubtful and Loss graded loans, the Company is almost certain of the losses, and the outstanding principal balances are generally charged-off to the realizable value.

The following tables present the balance of the loans receivable by credit quality indicator as of June 30, 2018 and December 31, 2017.

	June 30, 2018
	Pass		OAEM		Substandard		Doubtful/Loss		Total
	(In thousands)
Commercial business:
Commercial and industrial	$	731,265	$	23,559	$	45,219	$	—	$	800,043
Owner-occupied commercial real estate	656,991		16,402		19,937		—		693,330
Non-owner occupied commercial real estate	1,161,596		10,972		14,980		—		1,187,548
Total commercial business	2,549,852		50,933		80,136		—		2,680,921
One-to-four family residential	91,264		—		1,254		—		92,518
Real estate construction and land development:
One-to-four family residential	70,499		267		1,168		—		71,934
Five or more family residential and commercial properties	93,258		57		—		—		93,315
Total real estate construction and land development	163,757		324		1,168		—		165,249
Consumer	381,341		—		4,121		525		385,987
Gross loans receivable	$	3,186,214	$	51,257	$	86,679	$	525	$	3,324,675

	December 31, 2017
	Pass		OAEM		Substandard		Doubtful/Loss		Total
	(In thousands)
Commercial business:
Commercial and industrial	$	597,697	$	19,536	$	28,163	$	—	$	645,396
Owner-occupied commercial real estate	595,455		12,668		14,027		—		622,150
Non-owner occupied commercial real estate	955,450		10,494		20,650		—		986,594
Total commercial business	2,148,602		42,698		62,840		—		2,254,140
One-to-four family residential	85,762		—		1,235		—		86,997
Real estate construction and land development:
One-to-four family residential	49,925		537		1,523		—		51,985
Five or more family residential and commercial properties	96,404		707		388		—		97,499
Total real estate construction and land development	146,329		1,244		1,911		—		149,484
Consumer	349,590		—		4,976		525		355,091
Gross loans receivable	$	2,730,283	$	43,942	$	70,962	$	525	$	2,845,712

Potential problem loans are loans classified as OAEM or worse that are currently accruing interest and are not considered impaired, but which management is monitoring because the financial information of the borrower causes concern as to their ability to meet their loan repayment terms. Potential problem loans may include PCI loans as these loans continue to accrete loan discounts established at acquisition based on the guidance of FASB ASC 310-30. Potential problem loans as of June 30, 2018 and December 31, 2017 were $101.5 million and $83.5 million, respectively.

(d) Nonaccrual Loans

Nonaccrual loans, segregated by segments and classes of loans, were as follows as of June 30, 2018 and December 31, 2017:

	June 30, 2018		December 31, 2017
	(In thousands)
Commercial business:
Commercial and industrial	$	8,376	$	3,110
Owner-occupied commercial real estate	4,690		4,090
Non-owner occupied commercial real estate	2,169		1,898
Total commercial business	15,235		9,098
One-to-four family residential	77		81
Real estate construction and land development:
One-to-four family residential	1,084		1,247
Consumer	127		277
Nonaccrual loans	$	16,523	$	10,703

PCI loans are not included in the nonaccrual loan table above because these loans are accounted for under FASB ASC 310-30, which provides that accretable yield is calculated based on a loan's expected cash flow even if the loan is not performing under its contractual terms.

(e) Past due loans

The Company performs an aging analysis of past due loans using the categories of 30-89 days past due and 90 or more days past due. This policy is consistent with regulatory reporting requirements.

The balances of past due loans, segregated by segments and classes of loans, as of June 30, 2018 and December 31, 2017 were as follows:

	June 30, 2018
	30-89 Days		90 Days or Greater		Total Past  Due		Current		Total
	(In thousands)
Commercial business:
Commercial and industrial	$	3,719	$	4,122	$	7,841	$	792,202	$	800,043
Owner-occupied commercial real estate	129		868		997		692,333		693,330
Non-owner occupied commercial real estate	1,501		3,238		4,739		1,182,809		1,187,548
Total commercial business	5,349		8,228		13,577		2,667,344		2,680,921
One-to-four family residential	—		—		—		92,518		92,518
Real estate construction and land development:
One-to-four family residential	—		309		309		71,625		71,934
Five or more family residential and commercial properties	—		—		—		93,315		93,315
Total real estate construction and land development	—		309		309		164,940		165,249
Consumer	1,634		53		1,687		384,300		385,987
Gross loans receivable	$	6,983	$	8,590	$	15,573	$	3,309,102	$	3,324,675

	December 31, 2017
	30-89 Days		90 Days or Greater		Total Past  Due		Current		Total
	(In thousands)
Commercial business:
Commercial and industrial	$	2,993	$	1,172	$	4,165	$	641,231	$	645,396
Owner-occupied commercial real estate	1,277		1,225		2,502		619,648		622,150
Non-owner occupied commercial real estate	870		3,314		4,184		982,410		986,594
Total commercial business	5,140		5,711		10,851		2,243,289		2,254,140
One-to-four family residential	513		—		513		86,484		86,997
Real estate construction and land development:
One-to-four family residential	84		1,331		1,415		50,570		51,985
Five or more family residential and commercial properties	40		—		40		97,459		97,499
Total real estate construction and land development	124		1,331		1,455		148,029		149,484
Consumer	1,939		687		2,626		352,465		355,091
Gross loans receivable	$	7,716	$	7,729	$	15,445	$	2,830,267	$	2,845,712

There were no loans 90 days or more past due that were still accruing interest as of June 30, 2018 or December 31, 2017, excluding PCI loans.

(f) Impaired loans

Impaired loans include nonaccrual loans and performing troubled debt restructured ("TDR") loans. The balances of impaired loans as of June 30, 2018 and December 31, 2017 are set forth in the following tables.

	June 30, 2018
	Recorded Investment With No Specific Valuation Allowance		Recorded Investment With Specific Valuation Allowance		Total Recorded Investment		Unpaid Contractual Principal Balance		Related Specific Valuation Allowance
	(In thousands)
Commercial business:
Commercial and industrial	$	5,716	$	12,238	$	17,954	$	18,825	$	1,706
Owner-occupied commercial real estate	930		11,254		12,184		12,493		1,724
Non-owner occupied commercial real estate	4,662		5,923		10,585		10,558		784
Total commercial business	11,308		29,415		40,723		41,876		4,214
One-to-four family residential	—		291		291		301		90
Real estate construction and land development:
One-to-four family residential	775		309		1,084		1,842		5
Total real estate construction and land development	775		309		1,084		1,842		5
Consumer	53		329		382		447		74
Total	$	12,136	$	30,344	$	42,480	$	44,466	$	4,383

	December 31, 2017
	Recorded Investment With No Specific Valuation Allowance		Recorded Investment With Specific Valuation Allowance		Total Recorded Investment		Unpaid Contractual Principal Balance		Related Specific Valuation Allowance
	(In thousands)
Commercial business:
Commercial and industrial	$	2,127	$	9,872	$	11,999	$	12,489	$	1,326
Owner-occupied commercial real estate	2,452		4,356		6,808		7,054		621
Non-owner occupied commercial real estate	4,722		11,297		16,019		16,172		1,222
Total commercial business	9,301		25,525		34,826		35,715		3,169
One-to-four family residential	—		299		299		308		93
Real estate construction and land development:
One-to-four family residential	938		309		1,247		2,200		2
Five or more family residential and commercial properties	—		645		645		645		37
Total real estate construction and land development	938		954		1,892		2,845		39
Consumer	160		282		442		466		54
Total	$	10,399	$	27,060	$	37,459	$	39,334	$	3,355

The average recorded investment of impaired loans for the three and six months ended June 30, 2018 and 2017 are set forth in the following table.

	Three Months Ended June 30,				Six Months Ended June 30,
	2018		2017		2018		2017
	(In thousands)
Commercial business:
Commercial and industrial	$	17,299	$	6,925	$	15,534	$	8,742
Owner-occupied commercial real estate	12,643		3,278		12,622		3,760
Non-owner occupied commercial real estate	10,426		11,252		10,366		11,274
Total commercial business	40,368		21,455		38,522		23,776
One-to-four family residential	293		312		295		315
Real estate construction and land development:
One-to-four family residential	1,116		2,636		1,159		2,781
Five or more family residential and commercial properties	—		1,067		215		1,070
Total real estate construction and land development	1,116		3,703		1,374		3,851
Consumer	381		235		401		260
Total	$	42,158	$	25,705	$	40,592	$	28,202

For the three and six months ended June 30, 2018 and 2017, no interest income was recognized subsequent to a loan’s classification as nonaccrual. For the three and six months ended June 30, 2018, the Bank recorded $360,000 and $686,000, respectively, of interest income related to performing TDR loans. For the three and six months ended June 30, 2017, the Bank recorded $281,000 and $646,000, respectively, of interest income related to performing TDR loans.

(g) Troubled Debt Restructured Loans

A TDR loan is a restructuring in which the Bank, for economic or legal reasons related to a borrower’s financial difficulties, grants a concession to the borrower that it would not otherwise consider. TDR loans are considered impaired and are separately measured for impairment under FASB ASC 310-10-35, whether on accrual ("performing") or nonaccrual ("nonperforming") status. The Company has more stringent definitions of concessions and impairment measures for PCI loans as these loans have known credit deterioration and are generally accreting income at a lower discounted rate as compared to the contractual note rate based on the guidance of FASB ASC 310-30.

The majority of the Bank’s TDR loans are a result of granting extensions of maturity on troubled credits which have already been adversely classified. The Bank grants such extensions to reassess the borrower’s financial status and to develop a plan for repayment. The second most prevalent concessions are certain modifications with extensions that also include interest rate reductions. Certain TDR loans were additionally re-amortized over a longer period of time. These modifications would all be considered a concession for a borrower that could not obtain similar financing terms from another source other than from the Bank.

The financial effects of each modification will vary based on the specific restructure. For the majority of the Bank’s TDR loans, the loans were interest-only with a balloon payment at maturity. If the interest rate is not adjusted and the modified terms are consistent with other similar credits being offered, the Bank may not experience any loss associated with the restructure. If, however, the restructure involves forbearance agreements or interest rate modifications, the Bank may not collect all the principal and interest based on the original contractual terms. The Bank estimates the necessary allowance for loan losses on TDR loans using the same guidance as used for other impaired loans.

The recorded investment balance and related allowance for loan losses of performing and nonaccrual TDR loans as of June 30, 2018 and December 31, 2017 were as follows:

	June 30, 2018				December 31, 2017
	Performing TDRs		Nonaccrual TDRs		Performing TDRs		Nonaccrual TDRs
	(In thousands)
TDR loans	$	25,957	$	6,761	$	26,757	$	5,193
Allowance for loan losses on TDR loans	2,492		726		2,635		379

The unfunded commitment to borrowers related to TDR loans was $1.0 million and $1.2 million at June 30, 2018 and December 31, 2017, respectively.

Loans that were modified as TDR loans during the three and six months ended June 30, 2018 and 2017 are set forth in the following table:

	Three Months Ended June 30,
	2018			2017
	Number of Contracts (1)	Outstanding Principal Balance  (1)(2)		Number of Contracts (1)	Outstanding Principal Balance  (1)(2)
	(Dollars in thousands)
Commercial business:
Commercial and industrial	9	$	2,981	5	$	3,439
Owner-occupied commercial real estate	1	570		—	—
Non-owner occupied commercial real estate	—	—		1	947
Total commercial business	10	3,551		6	4,386
Real estate construction and land development:
One-to-four family residential	—	—		2	745
Total real estate construction and land development	—	—		2	745
Consumer	3	33		1	10
Total loans modified as TDR loans	13	$	3,584	9	$	5,141

	Six Months Ended June 30,
	2018			2017
	Number of Contracts (1)	Outstanding Principal Balance  (1)(2)		Number of Contracts (1)	Outstanding Principal Balance  (1)(2)
	(Dollars in thousands)
Commercial business:
Commercial and industrial	17	$	6,193	10	$	4,913
Owner-occupied commercial real estate	1	570		1	54
Non-owner occupied commercial real estate	2	2,380		1	948
Total commercial business	20	9,143		12	5,915
Real estate construction and land development:
One-to-four family residential	—	—		4	1,889
Total real estate construction and land development	—	—		4	1,889
Consumer	6	107		2	18
Total TDR loans	26	$	9,250	18	$	7,822

⁽¹⁾  Number of contracts and outstanding principal balance represent loans which have balances as of period end as certain loans may have been paid-down or charged-off during the three and six months ended June 30, 2018 and 2017.

⁽²⁾  Includes subsequent payments after modifications and reflects the balance as of period end. As the Bank did not forgive any principal or interest balance as part of the loan modification, the Bank’s recorded investment in each loan at the date of modification (pre-modification) did not change as a result of the modification (post-modification), except when the modification was the initial advance on a one-to-four family residential real estate construction and land development loan under a master guidance line. There were no advances on these types of loans during the three and six months ended June 30, 2018 and 2017.

Certain loans included in the table above may have been previously reported as TDR loans. The Bank typically grants shorter extension periods to continually monitor these TDR loans despite the fact that the extended date might not be the date the Bank expects sufficient cash flow from these borrowers. The Bank does not consider these modifications a subsequent default of a TDR as new loan terms, specifically new maturity dates, were granted. The potential losses related to these loans would have been considered in the period the loan was first reported as a TDR loan and are adjusted, as necessary, in the current period based on more recent information. The related specific valuation allowance at June 30, 2018 was $738,000 for loans that were modified as TDR loans during the three and six months ended June 30, 2018.

Loans that were modified during the previous twelve months that subsequently defaulted during the three and six months ended June 30, 2018 and 2017 are set forth in the following table:

	Three Months Ended June 30,
	2018			2017
	Number of Contracts	Outstanding Principal  Balance		Number of Contracts	Outstanding Principal  Balance
	(Dollars in thousands)
Commercial business:
Commercial and industrial	4	$	2,725	—	$	—
Total commercial business	4	2,725		—	—
Consumer	—	—		3	36
Total	4	$	2,725	3	$	36

	Six Months Ended June 30,
	2018			2017
	Number of Contracts	Outstanding Principal  Balance		Number of Contracts	Outstanding Principal  Balance
	(Dollars in thousands)
Commercial business:
Commercial and industrial	5	$	3,006	1	$	234
Non-owner occupied commercial real estate	1	73		—	—
Total commercial business	6	3,079		1	234
Real estate construction and land development:
One-to-four family residential	2	775		—	—
Total real estate construction and land development	2	775		—	—
Consumer	—	—		3	36
Total	8	$	3,854	4	$	270

During the three and six months ended June 30, 2018, two loans and six loans, respectively, defaulted because they were past their modified maturity dates, and the borrowers have not subsequently repaid the credits. The Bank has chosen not to extend the maturities on these loans. In addition, during the three and six months ended June 30, 2018, two loans and two loans, respectively, defaulted because the borrowers were more than 90 days delinquent on their scheduled loan payments. The Bank had no specific valuation allowance at June 30, 2018 related to the credits which defaulted during the six months ended June 30, 2018.     

During the three and six months ended June 30, 2017, three loans and four loans, respectively, defaulted because the borrowers were more than 90 days delinquent on their scheduled loan payments.

(h) Purchased Credit Impaired Loans

The Company acquired certain loans and designated them, as appropriate, as PCI loans, which are accounted for under FASB ASC 310-30. No loans acquired in the Puget Sound Merger effective January 16, 2018 were considered PCI.

The following table reflects the outstanding principal balance and recorded investment of the PCI loans at June 30, 2018 and December 31, 2017:

	June 30, 2018				December 31, 2017
	Outstanding Principal		Recorded Investment		Outstanding Principal		Recorded Investment
	(In thousands)
Commercial business:
Commercial and industrial	$	7,307	$	3,819	$	8,818	$	2,912
Owner-occupied commercial real estate	9,737		8,605		12,230		11,515
Non-owner occupied commercial real estate	12,545		11,033		14,295		13,342
Total commercial business	29,589		23,457		35,343		27,769
One-to-four family residential	3,701		3,833		4,120		5,255
Real estate construction and land development:
One-to-four family residential	107		391		841		89
Five or more family residential and commercial properties	193		11		2,361		2,035
Total real estate construction and land development	300		402		3,202		2,124
Consumer	2,932		4,160		3,974		5,455
Gross PCI loans	$	36,522	$	31,852	$	46,639	$	40,603

On the acquisition dates, the amount by which the undiscounted expected cash flows of the PCI loans exceeded the estimated fair value of the loan is the “accretable yield.” The accretable yield is then measured at each financial reporting date and represents the difference between the remaining undiscounted expected cash flows and the current carrying value of the PCI loans.

The following table summarizes the accretable yield on the PCI loans for the three and six months ended June 30, 2018 and 2017.

	Three Months Ended June 30,						Six Months Ended June 30,
	2018			2017			2018			2017
	(In thousands)
Balance at the beginning of the period	$	11,269		$	13,132		$	11,224		$	13,860
Accretion	(587		)	(935		)	(1,368		)	(1,929		)
Disposal and other	(273		)	(653		)	(1,971		)	(1,143		)
Change in accretable yield	(349		)	752			2,175			1,508
Balance at the end of the period	$	10,060		$	12,296		$	10,060		$	12,296

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Allowance for Loan Losses

6 Months Ended

Jun. 30, 2018

Receivables [Abstract]

Allowance for Loan Losses

Allowance for Loan Losses

The allowance for loan losses is maintained at a level deemed appropriate by management to provide for probable incurred credit losses in the loan portfolio. The following tables detail the activity in the allowance for loan losses disaggregated by segment and class for the three and six months ended June 30, 2018:

	Balance at Beginning of Period		Charge-offs			Recoveries		Provision for Loan Losses			Balance at End of Period
	(In thousands)
Three Months Ended June 30, 2018
Commercial business:
Commercial and industrial	$	9,943	$	(541	)	$	65	$	721		$	10,188
Owner-occupied commercial real estate	5,040		(1		)	3		204			5,246
Non-owner occupied commercial real estate	7,589		—			—		137			7,726
Total commercial business	22,572		(542		)	68		1,062			23,160
One-to-four family residential	1,083		(15		)	—		53			1,121
Real estate construction and land development:
One-to-four family residential	941		—			2		73			1,016
Five or more family residential and commercial properties	1,115		—			—		(71		)	1,044
Total real estate construction and land development	2,056		—			2		2			2,060
Consumer	6,054		(694		)	142		803			6,305
Unallocated	1,496		—			—		(170		)	1,326
Total	$	33,261	$	(1,251	)	$	212	$	1,750		$	33,972
Six Months Ended June 30, 2018
Commercial business:
Commercial and industrial	$	9,910	$	(622	)	$	564	$	336		$	10,188
Owner-occupied commercial real estate	3,992		(1		)	5		1,250			5,246
Non-owner occupied commercial real estate	8,097		—			—		(371		)	7,726
Total commercial business	21,999		(623		)	569		1,215			23,160
One-to-four family residential	1,056		(15		)	—		80			1,121
Real estate construction and land development:
One-to-four family residential	862		—			2		152			1,016
Five or more family residential and commercial properties	1,190		—			—		(146		)	1,044
Total real estate construction and land development	2,052		—			2		6			2,060
Consumer	6,081		(1,179		)	230		1,173			6,305
Unallocated	898		—			—		428			1,326
Total	$	32,086	$	(1,817	)	$	801	$	2,902		$	33,972

The following table details the allowance for loan losses disaggregated on the basis of the Company's impairment method as of June 30, 2018.

	Loans Individually Evaluated for Impairment		Loans Collectively Evaluated for Impairment		PCI Loans		Total Allowance for Loan Losses
	(In thousands)
Commercial business:
Commercial and industrial	$	1,706	$	7,564	$	918	$	10,188
Owner-occupied commercial real estate	1,724		2,736		786		5,246
Non-owner occupied commercial real estate	784		6,118		824		7,726
Total commercial business	4,214		16,418		2,528		23,160
One-to-four family residential	90		879		152		1,121
Real estate construction and land development:
One-to-four family residential	5		787		224		1,016
Five or more family residential and commercial properties	—		957		87		1,044
Total real estate construction and land development	5		1,744		311		2,060
Consumer	74		5,601		630		6,305
Unallocated	—		1,326		—		1,326
Total	$	4,383	$	25,968	$	3,621	$	33,972

The following table details the recorded investment balance of the loan receivables disaggregated on the basis of the Company’s impairment method as of June 30, 2018:

	Loans Individually Evaluated for Impairment		Loans Collectively Evaluated for Impairment		PCI Loans		Total Gross Loans Receivable
	(In thousands)
Commercial business:
Commercial and industrial	$	17,954	$	778,270	$	3,819	$	800,043
Owner-occupied commercial real estate	12,184		672,541		8,605		693,330
Non-owner occupied commercial real estate	10,585		1,165,930		11,033		1,187,548
Total commercial business	40,723		2,616,741		23,457		2,680,921
One-to-four family residential	291		88,394		3,833		92,518
Real estate construction and land development:
One-to-four family residential	1,084		70,459		391		71,934
Five or more family residential and commercial properties	—		93,304		11		93,315
Total real estate construction and land development	1,084		163,763		402		165,249
Consumer	382		381,445		4,160		385,987
Total	$	42,480	$	3,250,343	$	31,852	$	3,324,675

The following tables detail activity in the allowance for loan losses disaggregated by segment and class for the three and six months ended June 30, 2017.

	Balance at Beginning of Period		Charge-offs			Recoveries		Provision for Loan Losses			Balance at End of Period
	(In thousands)
Three Months Ended June 30, 2017
Commercial business:
Commercial and industrial	$	10,091	$	(63	)	$	452	$	171		$	10,651
Owner-occupied commercial real estate	4,216		(78		)	2		14			4,154
Non-owner occupied commercial real estate	7,601		—			—		108			7,709
Total commercial business	21,908		(141		)	454		293			22,514
One-to-four family residential	1,052		—			1		20			1,073
Real estate construction and land development:
One-to-four family residential	791		—			—		30			821
Five or more family residential and commercial properties	1,546		—			—		120			1,666
Total real estate construction and land development	2,337		—			—		150			2,487
Consumer	5,195		(398		)	110		803			5,710
Unallocated	1,102		—			—		(135		)	967
Total	$	31,594	$	(539	)	$	565	$	1,131		$	32,751
Six Months Ended June 30, 2017
Commercial business:
Commercial and industrial	$	10,968	$	(358	)	$	675	$	(634	)	$	10,651
Owner-occupied commercial real estate	3,661		(85		)	151		427			4,154
Non-owner occupied commercial real estate	7,753		—			—		(44		)	7,709
Total commercial business	22,382		(443		)	826		(251		)	22,514
One-to-four family residential	1,015		—			1		57			1,073
Real estate construction and land development:
One-to-four family residential	797		—			10		14			821
Five or more family residential and commercial properties	1,359		—			—		307			1,666
Total real estate construction and land development	2,156		—			10		321			2,487
Consumer	5,024		(941		)	217		1,410			5,710
Unallocated	506		—			—		461			967
Total	$	31,083	$	(1,384	)	$	1,054	$	1,998		$	32,751

The following table details the allowance for loan losses disaggregated on the basis of the Company's impairment method as of December 31, 2017.

	Loans Individually Evaluated for Impairment		Loans Collectively Evaluated for Impairment		PCI Loans		Total Allowance for Loan Losses
	(In thousands)
Commercial business:
Commercial and industrial	$	1,326	$	7,558	$	1,026	$	9,910
Owner-occupied commercial real estate	621		2,557		814		3,992
Non-owner occupied commercial real estate	1,222		5,919		956		8,097
Total commercial business	3,169		16,034		2,796		21,999
One-to-four family residential	93		798		165		1,056
Real estate construction and land development:
One-to-four family residential	2		635		225		862
Five or more family residential and commercial properties	37		1,064		89		1,190
Total real estate construction and land development	39		1,699		314		2,052
Consumer	54		5,303		724		6,081
Unallocated	—		898		—		898
Total	$	3,355	$	24,732	$	3,999	$	32,086

The following table details the recorded investment balance of the loan receivables disaggregated on the basis of the Company’s impairment method as of December 31, 2017:

	Loans Individually Evaluated for Impairment		Loans Collectively Evaluated for Impairment		PCI Loans		Total Gross Loans Receivable
	(In thousands)
Commercial business:
Commercial and industrial	$	11,999	$	630,485	$	2,912	$	645,396
Owner-occupied commercial real estate	6,808		603,827		11,515		622,150
Non-owner occupied commercial real estate	16,019		957,233		13,342		986,594
Total commercial business	34,826		2,191,545		27,769		2,254,140
One-to-four family residential	299		81,443		5,255		86,997
Real estate construction and land development:
One-to-four family residential	1,247		50,649		89		51,985
Five or more family residential and commercial properties	645		94,819		2,035		97,499
Total real estate construction and land development	1,892		145,468		2,124		149,484
Consumer	442		349,194		5,455		355,091
Total	$	37,459	$	2,767,650	$	40,603	$	2,845,712

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Other Real Estate Owned

6 Months Ended

Jun. 30, 2018

Real Estate [Abstract]

Other Real Estate Owned

Other Real Estate Owned

Changes in other real estate owned during the three and six months ended June 30, 2017 were as follows:

	Three Months Ended June 30,				Six Months Ended June 30,
	2018		2017		2018		2017
	(In thousands)
Balance at the beginning of the period	$	—	$	786	$	—	$	754
Additions	434		—		434		32
Balance at the end of the period	$	434	$	786	$	434	$	786

At June 30, 2018, the carrying amount of other real estate owned that was the result of foreclosure and obtaining physical possession of residential real estate properties was $434,000. At June 30, 2018, the recorded investment of consumer mortgage loans secured by residential real estate properties (included in the one-to-four family residential loans in Note (4) Loans Receivable) for which formal foreclosure proceedings were in process was $77,000.

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Goodwill and Other Intangible Assets

6 Months Ended

Jun. 30, 2018

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill and Other Intangible Assets

Goodwill and Other Intangible Assets

(a) Goodwill

The Company’s goodwill represents the excess of the purchase price over the fair value of net assets acquired in the recent Puget Sound Merger on January 16, 2018 and the historical acquisitions of Washington Banking Company on May 1, 2014; Valley Community Bancshares on July 15, 2013; Western Washington Bancorp in 2006 and North Pacific Bank in 1998. The Company’s goodwill is assigned to the Bank and is evaluated for impairment at the Bank level (reporting unit).

The following table presents the change in goodwill for the periods indicated:

	Three Months Ended June 30,				Six Months Ended June 30,
	2018		2017		2018		2017
	(In thousands)
Balance at the beginning of the period	$	187,549	$	119,029	$	119,029	$	119,029
Additions as a result of acquisitions (1)	—		—		68,520		—
Balance at the end of the period	$	187,549	$	119,029	$	187,549	$	119,029

⁽¹⁾ See Note (2) Business Combination

The Company performed its annual goodwill impairment test during the fourth quarter of 2017 and determined based on its Step 1 analysis that the fair value of the reporting unit exceeded the carrying value, such that the Company's goodwill was not considered impaired. Changes in the economic environment, operations of the reporting unit or other adverse events could result in future impairment charges which could have a material impact on the Company’s operating results.

(b) Other Intangible Assets

The other intangible assets represent the core deposit intangible ("CDI") acquired in business combinations. The useful life of the CDI related to the acquisitions of Puget Sound Bancorp, Washington Banking Company, Valley Community Bancshares, and Northwest Commercial Bank were estimated to be ten, ten, ten, and five years, respectively.

The following table presents the change in other intangible assets for the periods indicated:

	Three Months Ended June 30,						Six Months Ended June 30,
	2018			2017			2018			2017
	(In thousands)
Balance at the beginning of the period	$	16,563		$	7,050		$	6,088		$	7,374
Additions as a result of acquisitions (1)	—			—			11,270			—
Amortization	(796		)	(323		)	(1,591		)	(647		)
Balance at the end of the period	$	15,767		$	6,727		$	15,767		$	6,727

⁽¹⁾ See Note (2) Business Combination

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Junior Subordinated Debentures

6 Months Ended

Jun. 30, 2018

Debt Disclosure [Abstract]

Junior Subordinated Debentures

Junior Subordinated Debentures

As part of the acquisition of Washington Banking Company on May 1, 2014, the Company assumed trust preferred securities and junior subordinated debentures with a total fair value of $18.9 million at the merger date.

Washington Banking Master Trust, a Delaware statutory business trust, was a wholly-owned subsidiary of the Washington Banking Company created for the exclusive purposes of issuing and selling capital securities and utilizing sale proceeds to acquire junior subordinated debentures issued by the Washington Banking Company. During 2007, the Trust issued $25.0 million of trust preferred securities with a 30-year maturity, callable after the fifth year by the Washington Banking. The trust preferred securities have a quarterly adjustable rate based upon the three-month London Interbank Offered Rate (“LIBOR”) plus 1.56%. On the merger date, the Company acquired the Trust, which retained the Washington Banking Master Trust name, and assumed the performance and observance of the covenants under the indenture related to the trust preferred securities.

The adjustable rate of the trust preferred securities at June 30, 2018 was 3.90%. The weighted average rate of the junior subordinated debentures was as follows for the indicated periods:

	Three Months Ended June 30,				Six Months Ended June 30,
	2018		2017		2018		2017
Weighted average rate (1)	6.28	%	5.04	%	6.01	%	4.96	%

⁽¹⁾ The weighted average rate includes the accretion of the discount established at the merger date which is amortized over the life of the trust preferred securities.

The junior subordinated debentures are the sole assets of the Trust and payments under the junior subordinated debentures are the sole revenues of the Trust. At June 30, 2018 and December 31, 2017, the balance of the junior subordinated debentures, net of unaccreted discount, was $20.2 million and $20.0 million, respectively. All of the common securities of the Trust are owned by the Company. Heritage has fully and unconditionally guaranteed the capital securities along with all obligations of the Trust under the trust agreements. For financial reporting purposes, the Company's investment in the Master Trust is accounted for under the equity method and is included in prepaid expenses and other assets on the Company's Condensed Consolidated Statements of Financial Condition. The junior subordinated debentures issued and guaranteed by the Company and held by the Master Trust are reflected as liabilities on the Company's Condensed Consolidated Statements of Financial Condition.

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Repurchase Agreements

6 Months Ended

Jun. 30, 2018

Disclosure of Repurchase Agreements [Abstract]

Repurchase Agreements

Repurchase Agreements

The Company utilizes repurchase agreements with one-day maturities as a supplement to funding sources. Repurchase agreements are secured by pledged investment securities available for sale. Under the repurchase agreements, the Company is required to maintain an aggregate market value of securities pledged greater than the balance of the repurchase agreements. The Company is required to pledge additional securities to cover any declines below the balance of the repurchase agreements. For additional information on the total value of investment securities pledged for repurchase agreements see Note (3) Investment Securities.

The following table presents the Company's repurchase agreement obligations by class of collateral pledged:

	June 30, 2018		December 31, 2017
	(In thousands)
Mortgage-backed securities and collateralized mortgage obligations(1):
Residential	$	10,444	$	11,239
Commercial	11,724		20,582
Total repurchase agreements	$	22,168	$	31,821

⁽¹⁾ Issued and guaranteed by U.S. Government-sponsored agencies.

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Other Borrowings

6 Months Ended

Jun. 30, 2018

Debt Disclosure [Abstract]

Other Borrowings

Other Borrowings

(a) FHLB

The Federal Home Loan Bank ("FHLB") of Des Moines functions as a member-owned cooperative providing credit for member financial institutions. Advances are made pursuant to several different programs. Each credit program has its own interest rate and range of maturities. Limitations on the amount of advances are based on a percentage of the Bank's assets or on the FHLB’s assessment of the institution’s creditworthiness. At June 30, 2018, the Bank maintained a credit facility with the FHLB of Des Moines with available borrowing capacity of $838.1 million and had short-term FHLB advances outstanding of $75.5 million with maturity dates within 30 days. At December 31, 2017 there were FHLB advances outstanding of $92.5 million.

The following table sets forth the details of FHLB advances during the three and six months ended June 30, 2018 and 2017:

	Three Months Ended June 30,						Six Months Ended June 30,
	2018			2017			2018			2017
	(In thousands)
FHLB Advances:
Average balance during the period	$	79,115		$	107,125		$	57,544		$	104,144
Maximum month-end balance during the period	$	154,500		$	137,450		$	154,500		$	137,450
Weighted average rate during the period	2.04		%	0.89		%	1.93		%	0.86		%

Advances from the FHLB are collateralized by a blanket pledge on FHLB stock owned by the Bank, deposits at the FHLB, certain one-to-four single family residential loans or other assets, investment securities which are obligations of or guaranteed by the United States, or other assets. In accordance with the pledge agreement, the Company must maintain unencumbered collateral in an amount equal to varying percentages ranging from 100% to 160% of outstanding advances depending on the type of collateral.

(b) Federal Funds Purchased

The Bank maintains advance lines with Wells Fargo Bank, US Bank, The Independent Bankers Bank ("TIB") and Pacific Coast Bankers’ Bank to purchase federal funds of up to $90.0 million as of June 30, 2018. The lines generally mature annually or are reviewed annually. As of June 30, 2018 and December 31, 2017, there were no federal funds purchased.

(c) Credit Facilities

The Bank maintains a credit facility with the Federal Reserve Bank of San Francisco ("Federal Reserve Bank") with available borrowing capacity of $58.1 million as of June 30, 2018, on which there were no borrowings outstanding as of June 30, 2018 or December 31, 2017. Any advances on the credit facility would have to be first secured by the Bank's investment securities or loans receivable.

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Derivative Financial Instruments (Notes)

6 Months Ended

Jun. 30, 2018

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Derivative Financial Instruments

Derivative Financial Instruments

The Company has entered into certain interest rate swap contracts that are not designated as hedging instruments. The purpose of these derivative contracts is primarily to provide commercial business loan customers the ability to convert their loans from variable to fixed interest rates. Upon the origination of a derivative contract with a customer, the Company simultaneously enters into an offsetting derivative contract with a third party in order to offset its exposure on the variable and fixed rate components of the customer agreement. The Company recognizes immediate income based upon the difference in the bid/ask spread of the underlying transactions with its customers and the third party, which is recorded in interest rate swap fees on the Condensed Consolidated Statements of Income. Because the Company acts only as an intermediary for its customer, subsequent changes in the fair value of the underlying derivative contracts offset each other and do not significantly impact the Company’s results of operations.

The notional amounts and estimated fair values of interest rate derivative contracts outstanding at June 30, 2018 and December 31, 2017 are presented in the following table.

	June 30, 2018					December 31, 2017
	Notional Amounts		Estimated Fair Value			Notional Amounts		Estimated Fair Value
	(In thousands)
Non-hedging interest rate derivatives
Interest rate swaps with customer (1)	$	163,257	$	(5,454	)	$	146,537	$	(882	)
Interest rate swap with third party (1)	163,257		5,454			146,537		882

⁽¹⁾ The estimated fair value of the derivative included in prepaid and other assets on the Condensed Consolidated Statements of Financial Condition was $6.6 million and $3.4 million as of June 30, 2018 and December 31, 2017, respectively. The estimated fair value of the derivative included in accrued expenses and other liabilities on the Condensed Consolidated Statements of Financial Condition was $6.6 million and $3.4 million as of June 30, 2018 and December 31, 2017, respectively.

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Stockholders' Equity

6 Months Ended

Jun. 30, 2018

Stockholders' Equity Note [Abstract]

Stockholders' Equity

Stockholders’ Equity

(a) Earnings Per Common Share

The following table illustrates the reconciliation of weighted average shares used for earnings per common share computations for the three and six months ended June 30, 2018 and 2017:

	Three Months Ended June 30,						Six Months Ended June 30,
	2018			2017			2018			2017
	(Dollars in thousands)
Net income:
Net income	$	11,857		$	11,828		$	20,944		$	21,144
Less: Dividends and undistributed earnings allocated to participating securities	(57		)	(83		)	(110		)	(164		)
Net income allocated to common shareholders	$	11,800		$	11,745		$	20,834		$	20,980
Basic:
Weighted average common shares outstanding	34,023,566			29,939,280			33,680,014			29,945,641
Less: Restricted stock awards	(88,905		)	(183,082		)	(107,897		)	(215,446		)
Total basic weighted average common shares outstanding	33,934,661			29,756,198			33,572,117			29,730,195
Diluted:
Basic weighted average common shares outstanding	33,934,661			29,756,198			33,572,117			29,730,195
Effect of potentially dilutive common shares (1)	172,631			83,411			157,819			64,042
Total diluted weighted average common shares outstanding	34,107,292			29,839,609			33,729,936			29,794,237

⁽¹⁾  Represents the effect of the assumed exercise of stock options and vesting of restricted stock units.

Potential dilutive shares are excluded from the computation of earnings per share if their effect is anti-dilutive. For the three and six months ended June 30, 2018 and 2017, there were no anti-dilutive shares outstanding related to options to acquire common stock. Anti-dilution occurs when the exercise price of a stock option or the unrecognized compensation cost per share of a restricted stock award exceeds the market price of the Company’s stock.

(b) Dividends

The timing and amount of cash dividends paid on the Company's common stock depends on the Company’s earnings, capital requirements, financial condition and other relevant factors. Dividends on common stock from the Company depend substantially upon receipt of dividends from the Bank, which is the Company’s predominant source of income.

The following table summarizes the dividend activity for the six months ended June 30, 2018 and calendar year 2017.

Declared	Cash Dividend per Share	Record Date	Paid Date
January 25, 2017	$0.12	February 9, 2017	February 23, 2017
April 25, 2017	$0.13	May 10, 2017	May 24, 2017
July 25, 2017	$0.13	August 10, 2017	August 24, 2017
October 25, 2017	$0.13	November 8, 2017	November 22, 2017
October 25, 2017	$0.10	November 8, 2017	November 22, 2017	*
January 24, 2018	$0.15	February 7, 2018	February 21, 2018
April 25, 2018	$0.15	May 10, 2018	May 24, 2018

* Denotes a special dividend.

The FDIC and the Washington State Department of Financial Institutions, Division of Banks have the authority under their supervisory powers to prohibit the payment of dividends by the Bank to the Company. Additionally, current guidance from the Board of Governors of the Federal Reserve System ("Federal Reserve") provides, among other things, that dividends per share on the Company’s common stock generally should not exceed earnings per share, measured over the previous four fiscal quarters. Current regulations allow the Company and the Bank to pay dividends on their common stock if the Company’s or the Bank’s regulatory capital would not be reduced below the statutory capital requirements set by the Federal Reserve and the FDIC.

(c) Stock Repurchase Program

The Company has had various stock repurchase programs since March 1999. On October 23, 2014, the Company's Board of Directors authorized the repurchase of up to 5% of the Company's outstanding common shares, or approximately 1,513,000 shares, under the eleventh stock repurchase plan. The number, timing and price of shares repurchased will depend on business and market conditions and other factors, including opportunities to deploy the Company's capital.

Since the inception of the eleventh plan, the Company has repurchased 579,996 shares at an average share prices of $16.67. No shares were repurchased under this plan during the three and six months ended June 30, 2018 and 2017.

In addition to the stock repurchases under a plan, the Company repurchases shares to pay withholding taxes on the vesting of restricted stock awards and units. The following table provides total repurchased shares for the periods indicated:

	Three Months Ended June 30,				Six Months Ended June 30,
	2018		2017		2018		2017
Repurchased shares to pay withholding taxes (1)	7,394		11,476		52,820		27,367
Stock repurchase to pay withholding taxes average share price	$	33.84	$	25.50	$	31.96	$	24.60

⁽¹⁾ During the six months ended June 30, 2018, the Company repurchased 26,741 of shares related to the withholding taxes due on the accelerated vesting of the restricted stock units of Puget Sound which were converted to Heritage common stock shares with an average share price of $31.80 under the terms of the merger. See Note (2) Business Combination.

(d) Issuance of Common Stock

The Puget Sound Merger was effective on January 16, 2018. In conjunction with the merger was the issuance of 4,112,258 shares of the Company's common stock at the merger date share price of $31.80 for a fair value of $130.8 million.

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Accumulated Other Comprehensive (Loss) Income

6 Months Ended

Jun. 30, 2018

Equity [Abstract]

Accumulated Other Comprehensive (Loss) Income

Accumulated Other Comprehensive (Loss) Income

The changes in accumulated other comprehensive (loss) income (“AOCI”), all of which are due to changes in the fair value of available for sale securities and are net of tax, during the three and six months ended June 30, 2018 and 2017 are as follows:

	Three Months Ended						Six Months Ended
	2018			2017			2018			2017
	(In thousands)
Balance of AOCI at the beginning of period	$	(8,934	)	$	(1,133	)	$	(1,298	)	$	(2,606	)
Other comprehensive (loss) income before reclassification	(2,358		)	2,766			(9,874		)	4,239
Amounts reclassified from AOCI for gain on sale of investment securities included in net income	(14		)	(76		)	(41		)	(76		)
Net current period other comprehensive (loss) income	(2,372		)	2,690			(9,915		)	4,163
ASU 2016-01 implementation	—			—			(93		)	—
Balance of AOCI at the end of period	$	(11,306	)	$	1,557		$	(11,306	)	$	1,557

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Fair Value Measurements

6 Months Ended

Jun. 30, 2018

Fair Value Disclosures [Abstract]

Fair Value Measurements

Fair Value Measurements

Fair value is the exchange price that would be received for an asset or paid to transfer a liability (exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. There are three levels of inputs that may be used to measure fair values:

Level 1: Valuations for assets and liabilities traded in active exchange markets, or interest in open-end mutual funds that allow the Company to sell its ownership interest back to the fund at net asset value on a daily basis. Valuations are obtained from readily available pricing sources for market transactions involving identical assets, liabilities, or funds.

Level 2: Valuations for assets and liabilities traded in less active dealer or broker markets, such as quoted prices for similar assets or liabilities, quoted prices in markets that are not active, or valuations using methodologies with observable inputs.

Level 3: Valuations for assets and liabilities that are derived from other valuation methodologies, such as option pricing models, discounted cash flow models and similar techniques using unobservable inputs, and not based on market exchange, dealer, or broker traded transactions. Level 3 valuations incorporate certain assumptions and projections in determining the fair value assigned to such assets or liabilities.

(a) Recurring and Nonrecurring Basis

The Company used the following methods and significant assumptions to measure the fair value of certain assets on a recurring and nonrecurring basis:

Investment Securities Available for Sale:

The fair values of all investment securities are based upon the assumptions that market participants would use in pricing the security. If available, fair values of investment securities are determined by quoted market prices (Level 1). For investment securities where quoted market prices are not available, fair values are calculated based on market prices on similar securities (Level 2). For investment securities where quoted prices or market prices of similar securities are not available, fair values are calculated by using observable and unobservable inputs such as discounted cash flows or other market indicators (Level 3). Security valuations are obtained from third party pricing services for comparable assets or liabilities.

Impaired Loans:

At the time a loan is considered impaired, its impairment is measured based on either the present value of expected future cash flows discounted at the loan’s effective interest rate, the observable market price, or the fair market value of the collateral (less costs to sell) if the loan is collateral-dependent. Impaired loans for which impairment is measured using the discounted cash flow approach are not considered to be measured at fair value because the loan’s effective interest rate is generally not a fair value input, and for the purposes of fair value disclosures, the fair value of these loans are measured commensurate with non-impaired loans. If the Company utilizes the fair market value of the collateral method, the fair value used to measure impairment is commonly based on recent real estate appraisals. These appraisals may utilize a single valuation approach or a combination of approaches including comparable sales and the income approach. Adjustments are routinely made in the appraisal process by independent appraisers to adjust for differences between the comparable sales and income data available. Such adjustments are usually significant and typically result in a Level 3 classification of the inputs for determining fair value. Non-real estate collateral may be valued using an appraisal, net book value based on the borrower’s financial statements, or aging reports, adjusted or discounted based on management’s historical knowledge, changes in market conditions from the time of the valuation and management’s expertise and knowledge of the client and client’s business (Level 3). Impaired loans are evaluated on a quarterly basis and impairment and is adjusted accordingly.

Other Real Estate Owned:

Assets acquired through or instead of loan foreclosure are initially recorded at fair value less costs to sell when acquired, establishing a new cost basis. These assets are subsequently accounted for at lower of cost or fair value less costs to sell. Fair value is commonly based on recent real estate appraisals. These appraisals may utilize a single valuation approach or a combination of approaches including comparable sales and the income approach. Adjustments are routinely made in the appraisal process by independent appraisers to adjust for differences between the comparable sales and income data available. Such adjustments are usually significant and typically result in Level 3 classification of the inputs for determining fair value.

Appraisals for both collateral-dependent impaired loans and other real estate owned are performed by certified general appraisers for commercial properties or certified residential appraisers for residential properties whose qualifications and licenses have been reviewed and verified by the Company. Once received, the Company reviews the assumptions and approaches utilized in the appraisal as well as the resulting fair value in comparison with independent data sources such as recent market data or industry-wide statistics. On a quarterly basis, the Company compares the actual selling price of collateral that has been liquidated to the most recent appraised value to determine what additional adjustment should be made to the appraisal value to arrive at fair value.

Derivative Financial Instruments:

The Company obtains broker or dealer quotes to value its interest rate derivative contracts, which use valuation models using observable market data as of the measurement date (Level 2).

The following tables summarize the balances of assets and liabilities measured at fair value on a recurring basis as of June 30, 2018 and December 31, 2017.

	June 30, 2018
	Total		Level 1		Level 2		Level 3
	(In thousands)
Assets
Investment securities available for sale:
U.S. Treasury and U.S. Government-sponsored agencies	$	52,064	$	—	$	52,064	$	—
Municipal securities	203,022		—		203,022		—
Mortgage-backed securities and collateralized mortgage obligations:
Residential	312,122		—		312,122		—
Commercial	250,221		—		250,221		—
Collateralized loan obligations	2,256		—		2,256		—
Corporate obligations	25,690		—		25,690		—
Other asset-backed securities	28,295		—		28,295		—
Total investment securities available for sale	873,670		—		873,670		—
Derivative assets - interest rate swaps	6,629		—		6,629		—
Liabilities
Derivative liabilities - interest rate swaps	$	6,629	$	—	$	6,629	$	—

	December 31, 2017
	Total		Level 1		Level 2		Level 3
	(In thousands)
Assets
Investment securities available for sale:
U.S. Treasury and U.S. Government-sponsored agencies	$	13,442	$	—	$	13,442	$	—
Municipal securities	250,015		—		250,015		—
Mortgage-backed securities and collateralized mortgage obligations:
Residential	280,211		—		280,211		—
Commercial	217,079		—		217,079		—
Collateralized loan obligations	4,580		—		4,580		—
Corporate obligations	16,770		—		16,770		—
Other securities	28,433		146		28,287		—
Total investment securities available for sale	810,530		146		810,384		—
Derivative assets - interest rate swaps	3,418		—		3,418		—
Liabilities
Derivative liabilities - interest rate swaps	$	3,418	$	—	$	3,418	$	—

There were no transfers between Level 1 and Level 2 during the three and six months ended June 30, 2018 and 2017.

The Company may be required to measure certain financial assets and liabilities at fair value on a nonrecurring basis. These adjustments to fair value usually result from application of lower-of-cost-or-market accounting or write-downs of individual assets.

The tables below represent assets measured at fair value on a nonrecurring basis at June 30, 2018 and December 31, 2017 and the net losses recorded in earnings during three and six months ended June 30, 2018 and 2017.

	Basis(1)		Fair Value at June 30, 2018
			Total		Level 1		Level 2		Level 3		Net Losses (Gains) Recorded in Earnings  During the Three Months Ended June 30, 2018		Net Losses (Gains) Recorded in Earnings  During the Six Months Ended June 30, 2018
	(In thousands)
Impaired loans:
Real estate construction and land development:
One-to-four family residential	$	976	$	304	$	—	$	—	$	304	$	3	3
Total assets measured at fair value on a nonrecurring basis	$	976	$	304	$	—	$	—	$	304	$	3	$	3

⁽¹⁾  Basis represents the unpaid principal balance of impaired loans.

	Basis(1)		Fair Value at December 31, 2017
			Total		Level 1		Level 2		Level 3		Net Losses Recorded in Earnings  During the Three Months Ended June 30, 2017		Net Losses (Gains) Recorded in Earnings  During the Six Months Ended June 30, 2017
	(In thousands)
Impaired loans:
Real estate construction and land development:
One-to-four family residential	$	976	$	307	$	—	$	—	$	307	$	—	—
Total assets measured at fair value on a nonrecurring basis	$	976	$	307	$	—	$	—	$	307	$	—	$	—

⁽¹⁾  Basis represents the unpaid principal balance of impaired loans.

The following table presents quantitative information about Level 3 fair value measurements for financial instruments measured at fair value on a non-recurring basis at June 30, 2018 and December 31, 2017.

	June 30, 2018
	Fair Value		Valuation Technique(s)	Unobservable Input(s)	Range of Inputs; Weighted Average
	(Dollars in thousands)
Impaired loans	$	304	Market approach	Adjustment for differences between the comparable sales	(91.2%) - (14.4)%; (44.0%)

	December 31, 2017
	Fair Value		Valuation Technique(s)	Unobservable Input(s)	Range of Inputs; Weighted Average
	(Dollars in thousands)
Impaired loans	$	307	Market approach	Adjustment for differences between the comparable sales	(91.5%) - (14.4%); (44.0%)

(b) Fair Value of Financial Instruments

Because broadly traded markets do not exist for most of the Company’s financial instruments, the fair value calculations attempt to incorporate the effect of current market conditions at a specific time. These determinations are subjective in nature, involve uncertainties and matters of significant judgment and do not include tax ramifications; therefore, the results cannot be determined with precision, substantiated by comparison to independent markets and may not be realized in an actual sale or immediate settlement of the instruments. There may be inherent weaknesses in any calculation technique, and changes in the underlying assumptions used, including discount rates and estimates of future cash flows, could significantly affect the results. For all of these reasons, the aggregation of the fair value calculations presented herein do not represent, and should not be construed to represent, the underlying value of the Company.

The tables below present the carrying value amount of the Company’s financial instruments and their corresponding estimated fair values at the dates indicated.

	June 30, 2018
	Carrying Value		Fair Value		Fair Value Measurements Using:
					Level 1		Level 2		Level 3
	(In thousands)
Financial Assets:
Cash and cash equivalents	$	129,943	$	129,943	$	129,943	$	—	$	—
Investment securities available for sale	873,670		873,670		—		873,670		—
Federal Home Loan Bank stock	8,616		N/A		N/A		N/A		N/A
Loans held for sale	3,598		3,708		—		3,708		—
Total loans receivable, net	$	3,294,316	$	3,277,881	$	—	$	—	$	3,277,881
Accrued interest receivable	13,482		13,482		28		3,826		9,628
Derivative assets - interest rate swaps	6,629		6,629		—		6,629		—
Equity security	162		162		162		—		—
Financial Liabilities:
Noninterest deposits, interest bearing demand deposits, money market accounts and savings accounts	3,508,300		3,508,300		3,508,300		—		—
Certificate of deposit accounts	460,635		463,971		—		463,971		—
Federal Home Loan Bank advances	75,500		75,500		—		75,500		—
Securities sold under agreement to repurchase	22,168		22,168		22,168		—		—
Junior subordinated debentures	20,156		20,000		—		—		20,000
Accrued interest payable	198		198		46		107		45
Derivative liabilities - interest rate swaps	6,629		6,629		—		6,629		—

	December 31, 2017
	Carrying Value		Fair Value		Fair Value Measurements Using:
					Level 1		Level 2		Level 3
	(In thousands)
Financial Assets:
Cash and cash equivalents	$	103,015	$	103,015	$	103,015	$	—	$	—
Investment securities available for sale	810,530		810,530		146		810,384		—
Federal Home Loan Bank stock	8,347		N/A		N/A		N/A		N/A
Loans held for sale	2,288		2,364		—		2,364		—
Loans receivable, net of allowance for loan losses	2,816,985		2,810,401		—		—		2,810,401
Accrued interest receivable	12,244		12,244		23		3,772		8,449
Derivative assets - interest rate swaps	3,418		3,418		—		3,418		—
Financial Liabilities:
Noninterest deposits, interest bearing demand deposits, money market accounts and savings accounts	$	2,994,662	$	2,994,662	$	2,994,662	$	—	$	—
Certificate of deposit accounts	398,398		397,039		—		397,039		—
Federal Home Loan Bank advances	92,500		92,500		—		92,500		—
Securities sold under agreement to repurchase	31,821		31,821		31,821		—		—
Junior subordinated debentures	20,009		18,500		—		—		18,500
Accrued interest payable	162		162		45		79		38
Derivative liabilities - interest rate swaps	3,418		3,418		—		3,418		—

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Stock-Based Compensation

6 Months Ended

Jun. 30, 2018

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Stock-Based Compensation

Stock-Based Compensation

On July 24, 2014, the Company's shareholders approved the Heritage Financial Corporation 2014 Omnibus Equity Plan (the "Plan") that provides for the issuance of 1,500,000 shares of the Company's common stock in the form of stock options, stock appreciation rights, stock awards (which includes restricted stock units, restricted stock, performance units, performance shares or bonus shares) and cash incentive awards. The Company issues new shares of common stock to satisfy share option exercises and restricted stock awards. As of June 30, 2018, shares that remain available for future issuance under the Company's stock-based compensation plans was 964,832.

(a) Stock Option Awards

Stock options generally vest ratably over three years and expire five years after they become exercisable or vest ratably over four years and expire ten years from date of grant. For the three and six months ended June 30, 2018 and 2017, the Company did not recognize any compensation expense or related tax benefit related to stock options as all of the compensation expense related to the outstanding stock options had been previously recognized. The intrinsic value and cash proceeds from options exercised during the six months ended June 30, 2018 was $82,000 and $47,000, respectively. The intrinsic value and cash proceeds from options exercised during the six months ended June 30, 2017 was $98,000 and $109,000, respectively.

The following table summarizes the stock option activity for the six months ended June 30, 2018 and 2017:

	Shares		Weighted-Average Exercise Price		Weighted-Average Remaining Contractual Term (In years)	Aggregate Intrinsic Value (In thousands)
Outstanding at December 31, 2016	37,495		$	13.77
Exercised	(8,372	)	13.03
Forfeited or expired	(1,308	)	13.53
Outstanding, vested and expected to vest and exercisable at June 30, 2017	27,815		$	14.00	2.63	$	348
Outstanding at December 31, 2017	23,231		$	14.21
Exercised	(4,042	)	11.55
Forfeited or expired	(831	)	14.77
Outstanding, vested and expected to vest and exercisable at June 30, 2018	18,358		$	14.77	1.90	$	369

(b) Restricted Stock Awards

Restricted stock awards granted generally have a four-year cliff vesting or four-year ratable vesting schedule. For the three and six months ended June 30, 2018, the Company recognized compensation expense related to restricted stock awards of $249,000 and $532,000, respectively, and a related tax benefit of $52,000 and $112,000, respectively. For the three and six months ended June 30, 2017, the Company recognized compensation expense related to restricted stock awards of $359,000 and $804,000, respectively, and a related tax benefit of $126,000 and $282,000, respectively. As of June 30, 2018, the total unrecognized compensation expense related to non-vested restricted stock awards was $949,000 and the related weighted average period over which the compensation expense is expected to be recognized is approximately 1.38 years. The vesting date fair value of the restricted stock awards that vested during the six months ended June 30, 2018 and 2017 was $2.1 million and $2.6 million, respectively.

The following table summarizes the restricted stock award activity for the six months ended June 30, 2018 and 2017:

	Shares		Weighted-Average Grant Date Fair Value
Nonvested at December 31, 2016	261,296		$	16.80
Vested	(105,972	)	16.47
Forfeited	(7,704	)	16.78
Nonvested at June 30, 2017	147,620		$	17.04
Nonvested at December 31, 2017	137,399		$	17.00
Vested	(66,193	)	16.67
Forfeited	(2,394	)	16.86
Nonvested at June 30, 2018	68,812		$	17.32

(c) Restricted Stock Units

During 2017, the Company began issuing performance-based stock-settled restricted stock unit awards ("PRSU") and stock-settled restricted stock unit awards ("RSU"), collectively called "units". Restricted stock units granted vest ratably over three years. Performance restricted stock units granted generally have a three-year cliff vesting schedule. Additionally, performance restricted stock unit grants may be subject to performance-based vesting as well as other approved vesting conditions. The number of shares of actually delivered pursuant to the PRSUs depends on the performance of the Company's Total Shareholder Return and Return on Average Assets over the performance period in relation to the performance of the common stock of a predetermined peer group. The conditions of the grants allow for an actual payout ranging between no payout and 150% of target. The payout level is calculated based on actual performance achieved during the performance period compared to a defined peer group. The fair value of such PRSUs was determined using a Monte Carlo simulation and will be recognized over the subsequent three years. The Monte-Carlo simulation model uses the same input assumptions as the Black-Scholes model; however, it also further incorporates into the fair value determination the possibility that the market condition may not be satisfied. Compensation costs related to these awards are recognized regardless of whether the market condition is satisfied, provided that the requisite service has been provided.

Expected volatilities in the model were estimated using a historical period consistent with the performance period of approximately three years. The risk-free interest rate was based on the United States Treasury rate for a term commensurate with the expected life of the grant. The Company used the following assumptions to estimate the fair value of PRSUs granted during February 2018 and 2017:

	2018		2017
Shares issued	5,550		6,089
Expected Term in Years	2.84		2.85
Weighted-Average Risk Free Interest Rate	2.39	%	1.40	%
Expected Dividend Yield	—	%	—	%
Weighted-Average Fair Value	27.69		24.39
Correlation coefficient	ABA NASDAQ Community Bank Index		ABA NASDAQ Community Bank Index
Range of peer company volatilities	18.99% - 51.42%		17.8% - 63.1%
Range of peer company correlation coefficients	28.16% - 94.29%		8.24% - 89.79%
Heritage volatility	22.3	%	21.8	%
Heritage correlation coefficient	76.44	%	75.93	%

For the three and six months ended June 30, 2018, the Company recognized compensation expense related to the units of $435,000 and $775,000, respectively, and a related tax benefit of $91,000 and $163,000, respectively. For the three and six months ended June 30, 2017, the Company recognized compensation expense related the units of $171,000 and $236,000, respectively, and a related tax benefit of $60,000 and $83,000, respectively. As of June 30, 2018, the total unrecognized compensation expense related to non-vested units was $4.1 million and the related weighted average period over which the compensation expense is expected to be recognized is approximately 2.65 years. The vesting date fair value of the units that vested during the six months ended June 30, 2018 was $1.0 million. There were no units that vested during the six months ended June 30, 2017.

The following table summarizes the unit activity for the six months ended June 30, 2018 and 2017:

	Shares		Weighted-Average Grant Date Fair Value
Nonvested at December 31, 2016	—		$	—
Granted	92,019		25.29
Forfeited	(909	)	25.35
Nonvested at June 30, 2017	91,110		$	25.29
Nonvested at December 31, 2017	90,544		$	25.31
Granted	114,015		30.61
Vested	(32,262	)	25.42
Forfeited	(3,644	)	27.87
Nonvested at June 30, 2018	168,653		$	28.51

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Cash Requirement

6 Months Ended

Jun. 30, 2018

Banking and Thrift [Abstract]

Cash Requirement

Cash Requirement

The Company is required to maintain an average reserve balance with the Federal Reserve Bank or maintain such reserve balance in the form of cash. The required reserve balance at June 30, 2018 and December 31, 2017 was $10.9 million and $60,000, respectively, and was met by holding cash and maintaining an average balance with the Federal Reserve Bank.

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Description of Business, Basis of Presentation and Significant Accounting Policies and Recently Issued Accounting Pronouncements (Policies)

6 Months Ended

Jun. 30, 2018

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Description of Business

Description of Business

Heritage Financial Corporation ("Heritage" or the “Company”) is a bank holding company that was incorporated in the State of Washington in August 1997. The Company is primarily engaged in the business of planning, directing and coordinating the business activities of its wholly-owned subsidiary, Heritage Bank (the “Bank”). The Bank is a Washington-chartered commercial bank and its deposits are insured by the Federal Deposit Insurance Corporation ("FDIC"). The Bank is headquartered in Olympia, Washington and conducts business from its 59 branch offices as of June 30, 2018 located throughout Washington State and the greater Portland, Oregon area. The Bank’s business consists primarily of commercial lending and deposit relationships with small businesses and their owners in its market areas and attracting deposits from the general public. The Bank also makes real estate construction and land development loans, consumer loans and originates first mortgage loans on residential properties primarily located in its market areas.

On January 16, 2018, the Company completed the acquisition of Puget Sound Bancorp, Inc. (“Puget Sound”), the holding company for Puget Sound Bank, both of Bellevue, Washington (“Puget Sound Merger”). See Note (2) Business Combination for additional information on the merger.

On March 8, 2018, the Company entered into a definitive agreement to acquire Premier Commercial Bancorp, ("Premier Commercial") and its wholly-owned bank subsidiary, Premier Community Bank, both of Hillsboro, Oregon (the "Premier Merger"). The Premier Merger was completed on July 2, 2018. See Note (17) Subsequent Event for additional information on the merger.

Basis of Presentation

Basis of Presentation

The accompanying unaudited Condensed Consolidated Financial Statements have been prepared in accordance with the accounting principles generally accepted in the United States (“U.S. GAAP”) for interim financial information and pursuant to the rules and regulations of the Securities and Exchange Commission ("SEC"). Accordingly, they do not include all of the information and footnotes required by U.S. GAAP for complete financial statements. It is recommended that these unaudited Condensed Consolidated Financial Statements and accompanying Notes be read with the audited Consolidated Financial Statements and the accompanying Notes included in the Company's Annual Report on Form 10-K for the year ended December 31, 2017 (“2017 Annual Form 10-K”). In management's opinion, all adjustments (consisting only of normal recurring adjustments) considered necessary for a fair presentation have been included. Operating results for the three and six months ended June 30, 2018 are not necessarily indicative of the results that may be expected for the year ending December 31, 2018. In preparing the unaudited Condensed Consolidated Financial Statements, management is required to make estimates and assumptions that affect the reported amounts of assets, liabilities, revenues, expenses and related disclosures. Management believes that the judgments, estimates and assumptions used in the preparation of the financial statements are appropriate based on the facts and circumstances at the time. Actual results, however, could differ significantly from those estimates.

Revenue from Contracts with Customers

Revenue from Contracts with Customers

Accounting Standards Codification Topic 606, Revenue from Contracts with Customers, (“ASC 606”), as amended, was adopted by the Company on January 1, 2018. ASC 606 applies to all contracts with customers to provide goods or services in the ordinary course of business, except for contracts that are specifically excluded from its scope.  The Company's revenues are primarily composed of interest income on financial instruments, such as loans and investment securities, which are excluded from the scope of ASC 606.  Descriptions of our revenue-generating activities that are within the scope ASC 606, which are presented in Service Charges and Other Fees and Other Income on the Company’s Condensed Consolidated Statement of Income, are as follows:

• Service Charges on Deposit Accounts: The Company earns fees from its deposit customers from a variety of deposit products and services.  Non-transaction based fees such as account maintenance fees and monthly statement fees are considered to be provided to the customer under a day-to-day contract with ongoing renewals. Revenues for these non-transaction fees are earned over the course of a month, representing the period over which the Company satisfies the performance obligation.  Transaction-based fees such as non-sufficient fund charges, stop payment charges and wire fees are recognized at the time the transaction is executed as the contract duration does not extend beyond the service performed. 

• Wealth Management and Trust Services: The Company earns fees from contracts with customers for fiduciary and brokerage activities. Revenues are generally recognized on a monthly basis and are generally based on a percentage of the customer’s assets under management or based on investment or insurance solutions that are implemented for the customer.

• Merchant Processing Services and Debit and Credit Card Fees: The Company earns fees from cardholder transactions conducted through third party payment network providers which consist of (i) interchange fees earned from the payment network as a debit card issuer, (ii) referral fee income, and (iii) ongoing merchant fees earned for referring customers to the payment processing provider.  These fees are recognized when the transaction occurs, but may settle on a daily or monthly basis. 

Recently Issued Accounting Pronouncements

Recently Issued Accounting Pronouncements

FASB ASU 2014-09, Revenue from Contracts with Customers, (as amended by FASB ASU 2015-14; FASB ASU 2016-08; FASB ASU 2016-10 and FASB ASU 2016-12), was issued in May 2014. Under this Accounting Standard Update ("ASU" or "Update"), the Financial Accounting Standards Board ("FASB") created a new Topic 606 which is in response to a joint initiative of FASB and the International Accounting Standards Board to clarify the principles for recognizing revenue and to develop a common revenue standard for U.S. GAAP and international financial reporting standards that would:

• Remove inconsistencies and weaknesses in revenue requirements.

• Provide a more robust framework for addressing revenue issues.

• Improve comparability of revenue recognition practices across entities, industries, jurisdictions and capital markets.

• Provide more useful information to users of financial statements through improved disclosure requirements.

• Simplify the preparation of financial statements by reducing the number of requirements to which an entity must refer.

The Company adopted the revenue recognition guidance, as amended, on January 1, 2018 using the modified retrospective approach. A significant amount of the Company’s revenues are derived from interest income on financial assets, which are excluded from the scope of the amended guidance. With respect to noninterest income and related disclosures, the Company has identified and evaluated the revenue streams and underlying revenue contracts within the scope of the guidance. The Company did not identify any significant changes in the timing of revenue recognition when considering the amended accounting guidance. The adoption of the Update did not have a material impact on the Company's Condensed Consolidated Financial Statements, but the adoption did change certain disclosure requirements as described in Significant Accounting Policies above.

FASB ASU 2016-01, Recognition and Measurement of Financial Assets and Financial Liabilities (Subtopic 825-10), was issued in January 2016, to enhance the reporting model for financial instruments to provide users of financial statements with more decision-useful information. This Update contains several provisions, including but not limited to (1) requiring equity investments, with certain exceptions, to be measured at fair value with changes in fair value recognized in net income; (2) simplifying the impairment assessment of equity investments without readily determinable fair values by requiring a qualitative assessment to identify impairment; (3) eliminating the requirement to disclose the method(s) and significant assumptions used to estimate fair value; and (4) requiring separate presentation of financial assets and liabilities by measurement category and form of financial asset on the balance sheet or the accompanying notes to the financial statements. The Update also changes certain financial statement disclosure requirements, including requiring disclosures of the fair value of financial instruments be made on the basis of exit price. The Company adopted this Update effective January 1, 2018 using the cumulative catch-up transition method. This change resulted in a cumulative adjustment of $93,000 from accumulated other comprehensive loss, net to retained earnings for the unrealized gain related to the Company's equity security. The Company's processes and procedures utilized to estimate the fair value of loans receivable and certificate of deposit accounts for disclosure requirements were additionally changed due to adoption of this Update. Previously, the Company valued these items using an entry price notion. This ASU emphasized that these instruments be measured using the exit price notion; accordingly, the Company refined its calculation as part of adopting this Update. Prior period information has not been updated to conform with the new guidance. See the Condensed Consolidated Statements of Stockholders' Equity and Note (14) Fair Value Measurements.

FASB ASU 2016-02, Leases (Topic 842) was originally issued in February 2016, to increase transparency and comparability of leases among organizations and to disclose key information about leasing arrangements. The Update sets out the principles for the recognition, measurement, presentation and disclosure of leases for both lessees and lessors. The Update requires lessees to apply a dual approach, classifying leases as either a finance or operating lease. This classification will determine whether the lease expense is recognized based on an effective interest method or on a straight-line basis over the term of the lease. A lessee is also required to record a right-of-use asset and a lease liability for all leases with a term greater than 12 months regardless of their classification. All cash payments will be classified within operating activities in the statement of cash flows. In transition, lessees and lessors are required to recognize and measure leases at the beginning of the earliest period presented using a modified retrospective approach. The Update is effective for public entities for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. The Company anticipates adopting the Update on January 1, 2019. Upon adoption of the guidance, the Company expects to report increased assets and increased liabilities on its Condensed Consolidated Statements of Financial Condition as a result of recognizing right-of-use assets and lease liabilities related to certain banking offices and certain equipment under noncancelable operating lease agreements, which currently are not reflected in its Condensed Consolidated Statements of Financial Condition.  During 2017, management developed its methodology to estimate the right-of use assets and lease liabilities. The Company anticipates electing an exclusion accounting policy for lease assets and lease liabilities for leases with a term of twelve months or less. The Company was committed to $13.7 million of minimum lease payments under noncancelable operating lease agreements at June 30, 2018. The Company does not expect the adoption of this Update will have a significant impact to its Condensed Consolidated Financial Statements.

FASB ASU 2016-13, Financial Instruments: Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments, was issued in June 2016. Commonly referred to as the current expected credit loss model ("CECL"), this Update requires financial assets measured at amortized cost basis to be presented at the net amount expected to be collected. The allowance for credit losses is a valuation account that is deducted from the amortized cost basis of the financial asset to present the net carrying value at the amount expected to be collected on the financial asset. The measurement of expected credit losses is based on relevant information about past events including historical experience, current conditions and reasonable and supportable forecasts that affect the collectibility of the reported amount. The amendment affects loans, debt securities, trade receivables, net investments in leases, off-balance-sheet credit exposures, reinsurance receivables and any other financial asset not excluded from the scope that have the contractual right to receive cash. The Update replaces the incurred loss impairment methodology, which generally only considered past events and current conditions, with a methodology that reflects the expected credit losses and required consideration of a broader range of reasonable and supportable information to estimate all expected credit losses. The Update additionally addresses purchased assets and introduces the purchased financial asset with a more-than-insignificant amount of credit deterioration since origination ("PCD"). The accounting for these PCD assets is similar to the existing accounting guidance of FASB ASC 310-30, Loans and Debt Securities Acquired with Deteriorated Credit Quality, for PCI assets, except the subsequent improvements in estimated cash flows will be immediately recognized into income, similar to the immediate recognition of subsequent deteriorations in cash flows. Current guidance only allows for the prospective recognition of these cash flow improvements. Because the terminology has been changed to a "more-than-insignificant" amount of credit deterioration, the presumption is that more assets might qualify for this accounting under the Update than those under current guidance. For public business entities, the Update is effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years with early adoption permitted for fiscal years after December 15, 2018. An entity will apply the Update through a cumulative-effect adjustment to retained earnings as of the beginning of the first reporting period in which the guidance is adopted. A prospective transition approach is required for debt securities. An entity that has previously applied the guidance of FASB ASC 310-30 will prospectively apply the guidance in this Update for PCD assets. A prospective transition approach should be used for PCD assets where upon adoption, the amortized cost basis should be adjusted to reflect the addition of the allowance for credit losses. The Company is anticipating adopting the Update on January 1, 2020. Upon adoption, the Company expects a change in the processes, internal controls and procedures to calculate the allowance for loan losses, including changes in assumptions and estimates to consider expected credit losses over the life of the loan versus the current accounting practice that utilizes the incurred loss model. The new guidance may result in an increase in the allowance for loan losses which will also reflect the new requirement to include the nonaccretable principal differences on PCI loans; however, the Company is still in the process of determining the magnitude of the increase and its impact on the Condensed Consolidated Financial Statements. In addition, the current accounting policy and procedures for other-than-temporary impairment on investment securities available for sale will be replaced with an allowance approach. During 2017, the Company's management created a CECL steering committee which has begun developing and implementing processes and procedures to ensure it is fully compliant with the amendments at the adoption date. To date, the CECL steering committee has selected a vendor to assist the Company in the adoption and has completed the implementation discovery sessions. The CECL steering committee is in the process of selecting appropriate methodologies and refining key data points in an effort to complete a mock CECL model by fourth quarter 2018.

FASB ASU 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments, was issued in August 2016. The Update addresses eight specific cash flow issues with the objective of reducing the existing diversity in practice. For public business entities, the guidance was effective for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years, and must be applied using a retrospective transitional method to each period presented. The Company adopted this Update on January 1, 2018. The adoption did not have a significant impact on its Condensed Consolidated Financial Statements as cash proceeds received from the settlement of bank-owned life insurance policies and cash payments for premiums on bank-owned life insurance policies were previously classified as cash inflows and outflows, respectively, from investing activities in the Condensed Consolidated Statements of Cash Flows.

FASB ASU 2017-04, Goodwill (Topic 350), was issued in January 2017 and eliminates Step 2 from the goodwill impairment test. Under the amendments, an entity should perform its goodwill impairment test by comparing the fair value of a reporting unit with its carrying amount. An entity should recognize an impairment charge for the amount by which the carrying amount exceeds the reporting unit’s fair value. The loss recognized, however, should not exceed the total amount of goodwill allocated to that reporting unit. Additionally, an entity should consider income tax effects from any tax deductible goodwill on the carrying amount of the reporting unit when measuring the goodwill impairment loss, if applicable.  The Update is effective for annual periods or any interim goodwill impairment tests beginning after December 15, 2019 using a prospective transition method and early adoption is permitted. The Company does not expect the Update will have a material impact on its Condensed Consolidated Financial Statements.

FASB ASU 2017-08, Receivables—Nonrefundable Fees and Other Costs (Subtopic 310-20): Premium Amortization on Purchased Callable Debt Securities was issued in March 2017 and changes the accounting for certain purchased callable debt securities held at a premium to shorten the amortization period for the premium to the earliest call date rather than to the maturity date. Accounting for purchased callable debt securities held at a discount does not change. The discount would continue to amortize to the maturity date. The Update is effective for reporting periods beginning after December 15, 2018, with early adoption permitted. The Company adopted this Update in January 2018. The adoption did not have a material impact on its Condensed Consolidated Financial Statements as the Company had been accounting for premiums as prescribed under this guidance.

FASB ASU 2017-09, Compensation—Stock Compensation (Topic 718): Scope of Modification Accounting was issued in May 2017 to provide clarity as to when to apply modification accounting when there is a change in the terms or conditions of a share-based payment award. According to this Update, an entity should account for the effects of a modification unless the fair value, vesting conditions and balance sheet classification of the award is the same after the modification as compared to the original award prior to the modification. The Update was effective for reporting periods beginning after December 15, 2017. The Company adopted the Update on January 1, 2018. The adoption did not have a material impact on its Condensed Consolidated Financial Statements because no share-based payment award was modified during the six months ended June 30, 2018. The Company will apply this Update prospectively for any subsequent modifications of share-based payment awards.

FASB ASU 2018-02, Income Statement - Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income was issued to address the income tax accounting treatment of the stranded tax effects within other comprehensive income due to the prohibition of backward tracing due to an income tax rate change that was initially recorded in other comprehensive income. This issue came about from the enactment of the Tax Cuts and Jobs Act on December 22, 2017 ("Tax Cuts and Jobs Act") that changed the Company’s income tax rate from 35% to 21%. The Update changed current accounting whereby an entity may elect to reclassify the stranded tax effect from accumulated other comprehensive income to retained earnings. The Update is effective for periods beginning after December 15, 2018 although early adoption is permitted. The Company early adopted ASU 2018-02 effective December 31, 2017 and elected a portfolio policy to reclassify the stranded tax effects of the change in the federal corporate tax rate of the net unrealized gains on our available-for-sale investment securities from accumulated other comprehensive loss, net to retained earnings.

FASB ASU 2018-05, Income Taxes (Topic 740): Amendments to SEC Paragraphs Pursuant to SEC Staff Accounting Bulletin No. 118 was issued to provide guidance on the income tax accounting implications of the Tax Cuts and Jobs Act, and allows for entities to report provisional amounts for specific income tax effects of the Tax Cuts and Jobs Act for which the accounting under ASC Topic 740 was not yet complete but a reasonable estimate could be determined. A measurement period of one-year is allowed to complete the accounting effects under ASC Topic 740 and revise any previous estimates reported. Any provisional amounts or subsequent adjustments included in an entity’s financial statements during the measurement period should be included in income from continuing operations as an adjustment to tax expense in the reporting period the amounts are determined. The Company adopted this Update with the provisional adjustments as reported in the Consolidated Financial Statements on Form 10-K as of December 31, 2017. As of June 30, 2018, the Company did not incur any adjustments to the provisional recognition.

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Business Combination (Tables)

6 Months Ended

Jun. 30, 2018

Business Combinations [Abstract]

Preliminary fair value estimates of assets acquired and liabilities assumed and adjustments

The preliminary fair value estimates of the assets acquired and liabilities assumed in the Puget Sound Merger were as follows:

	Puget Sound Merger
	(In thousands)
Assets
Cash and cash equivalents	$	25,889
Interest earning deposits	54,247
Investment securities available for sale	80,353
Loans receivable	388,462
Premises and equipment, net	732
Federal Home Loan Bank stock, at cost	623
Bank owned life insurance	6,264
Accrued interest receivable	1,448
Prepaid expenses and other assets	1,354
Other intangible assets	11,270
Total assets acquired	$	570,642
Liabilities
Deposits	$	505,885
Accrued expenses and other liabilities	2,504
Total liabilities acquired	$	508,389
Fair value of net assets acquired	$	62,253

A summary of the net assets purchased and the preliminary estimated fair value adjustments and resulting goodwill recognized from the Puget Sound Merger are presented in the following tables. Goodwill represents the excess of the consideration transferred over the estimated fair value of the net assets acquired and liabilities assumed.

	Puget Sound Merger
	(In thousands)
Cost basis of net assets on merger date	$	54,405
Consideration transferred	(130,773		)
Fair value adjustments:
Investment securities	(348		)
Total loans receivable, net	1,400
Premises and equipment	(121		)
Other intangible assets	9,207
Prepaid expenses and other assets	(2,282		)
Deposits	(62		)
Accrued expenses and other liabilities	54
Goodwill recognized from the Puget Sound Merger	$	(68,520	)

Summary of results of operations of acquired business

The table below presents only the significant results for the acquired business since the January 16, 2018 merger date:

	Three Months Ended(1)			Six Months Ended(1)
	June 30, 2018
	(In thousands)
Interest income: Interest and fees on loans(2)	$	6,130		$	10,647
Interest income: Interest and fees on investments (3)	—			59
Interest income: Other interest earning assets	25			113
Interest expense	(180		)	(324		)
Provision for loan losses for loans	(350		)	(550		)
Noninterest income	109			257
Noninterest expense (4)	(2,092		)	(7,672		)
Net effect, pre-tax	$	3,642		$	2,530

⁽¹⁾ The Puget Sound Merger was completed on January 16, 2018.

⁽²⁾ Includes the accretion of the discount on the purchased loans of $1.1 million and $1.5 million during the three and six months ended June 30, 2018, respectively.

⁽³⁾ All securities were sold with trade date of January 16, 2018 and settlement dates on or before February 14, 2018.

⁽⁴⁾ Excludes certain compensation and employee benefits for management as it is impracticable to determine due to the integration of the operations for this merger. Also includes certain merger-related costs incurred by the Company.

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Investment Securities (Tables)

6 Months Ended

Jun. 30, 2018

Investments, Debt and Equity Securities [Abstract]

Schedule of securities available for sale

The amortized cost, gross unrealized gains, gross unrealized losses and fair values of investment securities available for sale at the dates indicated were as follows:

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
	(In thousands)
June 30, 2018
U.S. Treasury and U.S. Government-sponsored agencies	$	52,256	$	42	$	(234	)	$	52,064
Municipal securities	202,918		1,366		(1,262		)	203,022
Mortgage-backed securities and collateralized mortgage obligations(1):
Residential	319,492		352		(7,722		)	312,122
Commercial	257,858		141		(7,778		)	250,221
Collateralized loan obligations	2,253		3		—			2,256
Corporate obligations	25,617		153		(80		)	25,690
Other asset-backed securities	27,603		692		—			28,295
Total	$	887,997	$	2,749	$	(17,076	)	$	873,670
December 31, 2017
U.S. Treasury and U.S. Government-sponsored agencies	$	13,460	$	6	$	(24	)	$	13,442
Municipal securities	247,358		3,720		(1,063		)	250,015
Mortgage-backed securities and collateralized mortgage obligations(1):
Residential	282,724		422		(2,935		)	280,211
Commercial	219,696		444		(3,061		)	217,079
Collateralized loan obligations	4,561		19		—			4,580
Corporate obligations	16,594		220		(44		)	16,770
Other securities (2)	27,781		652		—			28,433
Total	$	812,174	$	5,483	$	(7,127	)	$	810,530

⁽¹⁾  Issued and guaranteed by U.S. Government-sponsored agencies.

⁽²⁾  Primarily asset-backed securities.

Schedule of maturities of investment securities

The amortized cost and fair value of investment securities available for sale at June 30, 2018, by contractual maturity, are set forth below. Actual maturities may differ from contractual maturities because certain borrowers have the right to call or prepay obligations with or without call or prepayment penalties.

	Amortized Cost		Fair Value
	(In thousands)
Due in one year or less	$	24,656	$	24,690
Due after one year through five years	149,590		148,197
Due after five years through ten years	254,873		248,759
Due after ten years	458,878		452,024
Total	$	887,997	$	873,670

Schedule of fair value and unrealized losses of available for sale investment securities

The following table shows the gross unrealized losses and fair value of the Company's investment securities available for sale that are not deemed to be other-than-temporarily impaired, aggregated by investment category and length of time that the individual securities have been in continuous unrealized loss positions as of June 30, 2018 and December 31, 2017:

	Less than 12 Months					12 Months or Longer					Total
	Fair Value		Unrealized Losses			Fair Value		Unrealized Losses			Fair Value		Unrealized Losses
	(In thousands)
June 30, 2018
U.S. Treasury and U.S. Government-sponsored agencies	$	34,674	$	(223	)	$	536	$	(11	)	$	35,210	$	(234	)
Municipal securities	63,443		(552		)	22,903		(710		)	86,346		(1,262		)
Mortgage-backed securities and collateralized mortgage obligations(1):
Residential	178,865		(3,954		)	78,330		(3,768		)	257,195		(7,722		)
Commercial	128,298		(3,058		)	94,847		(4,720		)	223,145		(7,778		)
Corporate obligations	15,482		(80		)	—		—			15,482		(80		)
Total	$	420,762	$	(7,867	)	$	196,616	$	(9,209	)	$	617,378	$	(17,076	)
December 31, 2017
U.S. Treasury and U.S. Government-sponsored agencies	$	11,436	$	(24	)	$	—	$	—		$	11,436	$	(24	)
Municipal securities	39,298		(384		)	26,509		(679		)	65,807		(1,063		)
Mortgage-backed securities and collateralized mortgage obligations(1):
Residential	175,847		(1,296		)	66,380		(1,639		)	242,227		(2,935		)
Commercial	75,121		(700		)	90,822		(2,361		)	165,943		(3,061		)
Corporate obligations	3,472		(44		)	—		—			3,472		(44		)
Total	$	305,174	$	(2,448	)	$	183,711	$	(4,679	)	$	488,885	$	(7,127	)

⁽¹⁾ Issued and guaranteed by U.S. Government-sponsored agencies.

Schedule of realized gains and losses on sale of securities available for sale

The following table presents the gross realized gains and losses on the sale of securities available for sale for the three and six months ended June 30, 2018 and 2017.

	Three Months Ended June 30,				Six Months Ended June 30,
	2018		2017		2018			2017
	(In thousands)
Gross realized gains	$	18	$	117	$	122		$	117
Gross realized losses	—		—		(69		)	—
Net realized gains	$	18	$	117	$	53		$	117

Scheduled of amortized cost and fair value of securities pledged as collateral

The following table summarizes the amortized cost and fair value of investment securities available for sale that are pledged as collateral for the following obligations at June 30, 2018 and December 31, 2017:

	June 30, 2018				December 31, 2017
	Amortized Cost		Fair Value		Amortized Cost		Fair Value
	(In thousands)
Washington and Oregon state to secure public deposits	$	197,047	$	193,946	$	206,377	$	206,425
Repurchase agreements	45,463		44,207		48,750		48,237
Other securities pledged	20,048		19,742		12,484		12,498
Total	$	262,558	$	257,895	$	267,611	$	267,160

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Loans Receivable (Tables)

6 Months Ended

Jun. 30, 2018

Loans and Leases Receivable Disclosure [Abstract]

Schedule of loans receivable

Loans receivable at June 30, 2018 and December 31, 2017 consisted of the following portfolio segments and classes:

	June 30, 2018			December 31, 2017
	(In thousands)
Commercial business:
Commercial and industrial	$	800,043		$	645,396
Owner-occupied commercial real estate	693,330			622,150
Non-owner occupied commercial real estate	1,187,548			986,594
Total commercial business	2,680,921			2,254,140
One-to-four family residential	92,518			86,997
Real estate construction and land development:
One-to-four family residential	71,934			51,985
Five or more family residential and commercial properties	93,315			97,499
Total real estate construction and land development	165,249			149,484
Consumer	385,987			355,091
Gross loans receivable	3,324,675			2,845,712
Net deferred loan costs	3,613			3,359
Loans receivable, net	3,328,288			2,849,071
Allowance for loan losses	(33,972		)	(32,086		)
Total loans receivable, net	$	3,294,316		$	2,816,985

Loans receivable by credit quality indicator

The following tables present the balance of the loans receivable by credit quality indicator as of June 30, 2018 and December 31, 2017.

	June 30, 2018
	Pass		OAEM		Substandard		Doubtful/Loss		Total
	(In thousands)
Commercial business:
Commercial and industrial	$	731,265	$	23,559	$	45,219	$	—	$	800,043
Owner-occupied commercial real estate	656,991		16,402		19,937		—		693,330
Non-owner occupied commercial real estate	1,161,596		10,972		14,980		—		1,187,548
Total commercial business	2,549,852		50,933		80,136		—		2,680,921
One-to-four family residential	91,264		—		1,254		—		92,518
Real estate construction and land development:
One-to-four family residential	70,499		267		1,168		—		71,934
Five or more family residential and commercial properties	93,258		57		—		—		93,315
Total real estate construction and land development	163,757		324		1,168		—		165,249
Consumer	381,341		—		4,121		525		385,987
Gross loans receivable	$	3,186,214	$	51,257	$	86,679	$	525	$	3,324,675

	December 31, 2017
	Pass		OAEM		Substandard		Doubtful/Loss		Total
	(In thousands)
Commercial business:
Commercial and industrial	$	597,697	$	19,536	$	28,163	$	—	$	645,396
Owner-occupied commercial real estate	595,455		12,668		14,027		—		622,150
Non-owner occupied commercial real estate	955,450		10,494		20,650		—		986,594
Total commercial business	2,148,602		42,698		62,840		—		2,254,140
One-to-four family residential	85,762		—		1,235		—		86,997
Real estate construction and land development:
One-to-four family residential	49,925		537		1,523		—		51,985
Five or more family residential and commercial properties	96,404		707		388		—		97,499
Total real estate construction and land development	146,329		1,244		1,911		—		149,484
Consumer	349,590		—		4,976		525		355,091
Gross loans receivable	$	2,730,283	$	43,942	$	70,962	$	525	$	2,845,712

Schedule of nonaccrual loans

Nonaccrual loans, segregated by segments and classes of loans, were as follows as of June 30, 2018 and December 31, 2017:

	June 30, 2018		December 31, 2017
	(In thousands)
Commercial business:
Commercial and industrial	$	8,376	$	3,110
Owner-occupied commercial real estate	4,690		4,090
Non-owner occupied commercial real estate	2,169		1,898
Total commercial business	15,235		9,098
One-to-four family residential	77		81
Real estate construction and land development:
One-to-four family residential	1,084		1,247
Consumer	127		277
Nonaccrual loans	$	16,523	$	10,703

Past due financing receivables

The balances of past due loans, segregated by segments and classes of loans, as of June 30, 2018 and December 31, 2017 were as follows:

	June 30, 2018
	30-89 Days		90 Days or Greater		Total Past  Due		Current		Total
	(In thousands)
Commercial business:
Commercial and industrial	$	3,719	$	4,122	$	7,841	$	792,202	$	800,043
Owner-occupied commercial real estate	129		868		997		692,333		693,330
Non-owner occupied commercial real estate	1,501		3,238		4,739		1,182,809		1,187,548
Total commercial business	5,349		8,228		13,577		2,667,344		2,680,921
One-to-four family residential	—		—		—		92,518		92,518
Real estate construction and land development:
One-to-four family residential	—		309		309		71,625		71,934
Five or more family residential and commercial properties	—		—		—		93,315		93,315
Total real estate construction and land development	—		309		309		164,940		165,249
Consumer	1,634		53		1,687		384,300		385,987
Gross loans receivable	$	6,983	$	8,590	$	15,573	$	3,309,102	$	3,324,675

	December 31, 2017
	30-89 Days		90 Days or Greater		Total Past  Due		Current		Total
	(In thousands)
Commercial business:
Commercial and industrial	$	2,993	$	1,172	$	4,165	$	641,231	$	645,396
Owner-occupied commercial real estate	1,277		1,225		2,502		619,648		622,150
Non-owner occupied commercial real estate	870		3,314		4,184		982,410		986,594
Total commercial business	5,140		5,711		10,851		2,243,289		2,254,140
One-to-four family residential	513		—		513		86,484		86,997
Real estate construction and land development:
One-to-four family residential	84		1,331		1,415		50,570		51,985
Five or more family residential and commercial properties	40		—		40		97,459		97,499
Total real estate construction and land development	124		1,331		1,455		148,029		149,484
Consumer	1,939		687		2,626		352,465		355,091
Gross loans receivable	$	7,716	$	7,729	$	15,445	$	2,830,267	$	2,845,712

Schedule of impaired loans, including restructured

Impaired loans include nonaccrual loans and performing troubled debt restructured ("TDR") loans. The balances of impaired loans as of June 30, 2018 and December 31, 2017 are set forth in the following tables.

	June 30, 2018
	Recorded Investment With No Specific Valuation Allowance		Recorded Investment With Specific Valuation Allowance		Total Recorded Investment		Unpaid Contractual Principal Balance		Related Specific Valuation Allowance
	(In thousands)
Commercial business:
Commercial and industrial	$	5,716	$	12,238	$	17,954	$	18,825	$	1,706
Owner-occupied commercial real estate	930		11,254		12,184		12,493		1,724
Non-owner occupied commercial real estate	4,662		5,923		10,585		10,558		784
Total commercial business	11,308		29,415		40,723		41,876		4,214
One-to-four family residential	—		291		291		301		90
Real estate construction and land development:
One-to-four family residential	775		309		1,084		1,842		5
Total real estate construction and land development	775		309		1,084		1,842		5
Consumer	53		329		382		447		74
Total	$	12,136	$	30,344	$	42,480	$	44,466	$	4,383

	December 31, 2017
	Recorded Investment With No Specific Valuation Allowance		Recorded Investment With Specific Valuation Allowance		Total Recorded Investment		Unpaid Contractual Principal Balance		Related Specific Valuation Allowance
	(In thousands)
Commercial business:
Commercial and industrial	$	2,127	$	9,872	$	11,999	$	12,489	$	1,326
Owner-occupied commercial real estate	2,452		4,356		6,808		7,054		621
Non-owner occupied commercial real estate	4,722		11,297		16,019		16,172		1,222
Total commercial business	9,301		25,525		34,826		35,715		3,169
One-to-four family residential	—		299		299		308		93
Real estate construction and land development:
One-to-four family residential	938		309		1,247		2,200		2
Five or more family residential and commercial properties	—		645		645		645		37
Total real estate construction and land development	938		954		1,892		2,845		39
Consumer	160		282		442		466		54
Total	$	10,399	$	27,060	$	37,459	$	39,334	$	3,355

Schedule of average recorded investment impaired loans including restructuring loans

The average recorded investment of impaired loans for the three and six months ended June 30, 2018 and 2017 are set forth in the following table.

	Three Months Ended June 30,				Six Months Ended June 30,
	2018		2017		2018		2017
	(In thousands)
Commercial business:
Commercial and industrial	$	17,299	$	6,925	$	15,534	$	8,742
Owner-occupied commercial real estate	12,643		3,278		12,622		3,760
Non-owner occupied commercial real estate	10,426		11,252		10,366		11,274
Total commercial business	40,368		21,455		38,522		23,776
One-to-four family residential	293		312		295		315
Real estate construction and land development:
One-to-four family residential	1,116		2,636		1,159		2,781
Five or more family residential and commercial properties	—		1,067		215		1,070
Total real estate construction and land development	1,116		3,703		1,374		3,851
Consumer	381		235		401		260
Total	$	42,158	$	25,705	$	40,592	$	28,202

Recorded investment balance and related allowance for loan losses of accruing and non-accruing TDRs

The recorded investment balance and related allowance for loan losses of performing and nonaccrual TDR loans as of June 30, 2018 and December 31, 2017 were as follows:

	June 30, 2018				December 31, 2017
	Performing TDRs		Nonaccrual TDRs		Performing TDRs		Nonaccrual TDRs
	(In thousands)
TDR loans	$	25,957	$	6,761	$	26,757	$	5,193
Allowance for loan losses on TDR loans	2,492		726		2,635		379

Troubled debt restructurings on financing receivables

Loans that were modified as TDR loans during the three and six months ended June 30, 2018 and 2017 are set forth in the following table:

	Three Months Ended June 30,
	2018			2017
	Number of Contracts (1)	Outstanding Principal Balance  (1)(2)		Number of Contracts (1)	Outstanding Principal Balance  (1)(2)
	(Dollars in thousands)
Commercial business:
Commercial and industrial	9	$	2,981	5	$	3,439
Owner-occupied commercial real estate	1	570		—	—
Non-owner occupied commercial real estate	—	—		1	947
Total commercial business	10	3,551		6	4,386
Real estate construction and land development:
One-to-four family residential	—	—		2	745
Total real estate construction and land development	—	—		2	745
Consumer	3	33		1	10
Total loans modified as TDR loans	13	$	3,584	9	$	5,141

	Six Months Ended June 30,
	2018			2017
	Number of Contracts (1)	Outstanding Principal Balance  (1)(2)		Number of Contracts (1)	Outstanding Principal Balance  (1)(2)
	(Dollars in thousands)
Commercial business:
Commercial and industrial	17	$	6,193	10	$	4,913
Owner-occupied commercial real estate	1	570		1	54
Non-owner occupied commercial real estate	2	2,380		1	948
Total commercial business	20	9,143		12	5,915
Real estate construction and land development:
One-to-four family residential	—	—		4	1,889
Total real estate construction and land development	—	—		4	1,889
Consumer	6	107		2	18
Total TDR loans	26	$	9,250	18	$	7,822

⁽¹⁾  Number of contracts and outstanding principal balance represent loans which have balances as of period end as certain loans may have been paid-down or charged-off during the three and six months ended June 30, 2018 and 2017.

⁽²⁾  Includes subsequent payments after modifications and reflects the balance as of period end. As the Bank did not forgive any principal or interest balance as part of the loan modification, the Bank’s recorded investment in each loan at the date of modification (pre-modification) did not change as a result of the modification (post-modification), except when the modification was the initial advance on a one-to-four family residential real estate construction and land development loan under a master guidance line. There were no advances on these types of loans during the three and six months ended June 30, 2018 and 2017.

Troubled debt restructuring loans, subsequently defaulted

Loans that were modified during the previous twelve months that subsequently defaulted during the three and six months ended June 30, 2018 and 2017 are set forth in the following table:

	Three Months Ended June 30,
	2018			2017
	Number of Contracts	Outstanding Principal  Balance		Number of Contracts	Outstanding Principal  Balance
	(Dollars in thousands)
Commercial business:
Commercial and industrial	4	$	2,725	—	$	—
Total commercial business	4	2,725		—	—
Consumer	—	—		3	36
Total	4	$	2,725	3	$	36

	Six Months Ended June 30,
	2018			2017
	Number of Contracts	Outstanding Principal  Balance		Number of Contracts	Outstanding Principal  Balance
	(Dollars in thousands)
Commercial business:
Commercial and industrial	5	$	3,006	1	$	234
Non-owner occupied commercial real estate	1	73		—	—
Total commercial business	6	3,079		1	234
Real estate construction and land development:
One-to-four family residential	2	775		—	—
Total real estate construction and land development	2	775		—	—
Consumer	—	—		3	36
Total	8	$	3,854	4	$	270

Purchased impaired loans

The following table reflects the outstanding principal balance and recorded investment of the PCI loans at June 30, 2018 and December 31, 2017:

	June 30, 2018				December 31, 2017
	Outstanding Principal		Recorded Investment		Outstanding Principal		Recorded Investment
	(In thousands)
Commercial business:
Commercial and industrial	$	7,307	$	3,819	$	8,818	$	2,912
Owner-occupied commercial real estate	9,737		8,605		12,230		11,515
Non-owner occupied commercial real estate	12,545		11,033		14,295		13,342
Total commercial business	29,589		23,457		35,343		27,769
One-to-four family residential	3,701		3,833		4,120		5,255
Real estate construction and land development:
One-to-four family residential	107		391		841		89
Five or more family residential and commercial properties	193		11		2,361		2,035
Total real estate construction and land development	300		402		3,202		2,124
Consumer	2,932		4,160		3,974		5,455
Gross PCI loans	$	36,522	$	31,852	$	46,639	$	40,603

Schedule of impaired purchased loans accretable yield

The following table summarizes the accretable yield on the PCI loans for the three and six months ended June 30, 2018 and 2017.

	Three Months Ended June 30,						Six Months Ended June 30,
	2018			2017			2018			2017
	(In thousands)
Balance at the beginning of the period	$	11,269		$	13,132		$	11,224		$	13,860
Accretion	(587		)	(935		)	(1,368		)	(1,929		)
Disposal and other	(273		)	(653		)	(1,971		)	(1,143		)
Change in accretable yield	(349		)	752			2,175			1,508
Balance at the end of the period	$	10,060		$	12,296		$	10,060		$	12,296

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Allowance for Loan Losses (Tables)

6 Months Ended

Jun. 30, 2018

Receivables [Abstract]

Schedule of changes in allowance for loan losses

The following tables detail activity in the allowance for loan losses disaggregated by segment and class for the three and six months ended June 30, 2017.

	Balance at Beginning of Period		Charge-offs			Recoveries		Provision for Loan Losses			Balance at End of Period
	(In thousands)
Three Months Ended June 30, 2017
Commercial business:
Commercial and industrial	$	10,091	$	(63	)	$	452	$	171		$	10,651
Owner-occupied commercial real estate	4,216		(78		)	2		14			4,154
Non-owner occupied commercial real estate	7,601		—			—		108			7,709
Total commercial business	21,908		(141		)	454		293			22,514
One-to-four family residential	1,052		—			1		20			1,073
Real estate construction and land development:
One-to-four family residential	791		—			—		30			821
Five or more family residential and commercial properties	1,546		—			—		120			1,666
Total real estate construction and land development	2,337		—			—		150			2,487
Consumer	5,195		(398		)	110		803			5,710
Unallocated	1,102		—			—		(135		)	967
Total	$	31,594	$	(539	)	$	565	$	1,131		$	32,751
Six Months Ended June 30, 2017
Commercial business:
Commercial and industrial	$	10,968	$	(358	)	$	675	$	(634	)	$	10,651
Owner-occupied commercial real estate	3,661		(85		)	151		427			4,154
Non-owner occupied commercial real estate	7,753		—			—		(44		)	7,709
Total commercial business	22,382		(443		)	826		(251		)	22,514
One-to-four family residential	1,015		—			1		57			1,073
Real estate construction and land development:
One-to-four family residential	797		—			10		14			821
Five or more family residential and commercial properties	1,359		—			—		307			1,666
Total real estate construction and land development	2,156		—			10		321			2,487
Consumer	5,024		(941		)	217		1,410			5,710
Unallocated	506		—			—		461			967
Total	$	31,083	$	(1,384	)	$	1,054	$	1,998		$	32,751

The following table details the allowance for loan losses disaggregated on the basis of the Company's impairment method as of December 31, 2017.

	Loans Individually Evaluated for Impairment		Loans Collectively Evaluated for Impairment		PCI Loans		Total Allowance for Loan Losses
	(In thousands)
Commercial business:
Commercial and industrial	$	1,326	$	7,558	$	1,026	$	9,910
Owner-occupied commercial real estate	621		2,557		814		3,992
Non-owner occupied commercial real estate	1,222		5,919		956		8,097
Total commercial business	3,169		16,034		2,796		21,999
One-to-four family residential	93		798		165		1,056
Real estate construction and land development:
One-to-four family residential	2		635		225		862
Five or more family residential and commercial properties	37		1,064		89		1,190
Total real estate construction and land development	39		1,699		314		2,052
Consumer	54		5,303		724		6,081
Unallocated	—		898		—		898
Total	$	3,355	$	24,732	$	3,999	$	32,086

The following tables detail the activity in the allowance for loan losses disaggregated by segment and class for the three and six months ended June 30, 2018:

	Balance at Beginning of Period		Charge-offs			Recoveries		Provision for Loan Losses			Balance at End of Period
	(In thousands)
Three Months Ended June 30, 2018
Commercial business:
Commercial and industrial	$	9,943	$	(541	)	$	65	$	721		$	10,188
Owner-occupied commercial real estate	5,040		(1		)	3		204			5,246
Non-owner occupied commercial real estate	7,589		—			—		137			7,726
Total commercial business	22,572		(542		)	68		1,062			23,160
One-to-four family residential	1,083		(15		)	—		53			1,121
Real estate construction and land development:
One-to-four family residential	941		—			2		73			1,016
Five or more family residential and commercial properties	1,115		—			—		(71		)	1,044
Total real estate construction and land development	2,056		—			2		2			2,060
Consumer	6,054		(694		)	142		803			6,305
Unallocated	1,496		—			—		(170		)	1,326
Total	$	33,261	$	(1,251	)	$	212	$	1,750		$	33,972
Six Months Ended June 30, 2018
Commercial business:
Commercial and industrial	$	9,910	$	(622	)	$	564	$	336		$	10,188
Owner-occupied commercial real estate	3,992		(1		)	5		1,250			5,246
Non-owner occupied commercial real estate	8,097		—			—		(371		)	7,726
Total commercial business	21,999		(623		)	569		1,215			23,160
One-to-four family residential	1,056		(15		)	—		80			1,121
Real estate construction and land development:
One-to-four family residential	862		—			2		152			1,016
Five or more family residential and commercial properties	1,190		—			—		(146		)	1,044
Total real estate construction and land development	2,052		—			2		6			2,060
Consumer	6,081		(1,179		)	230		1,173			6,305
Unallocated	898		—			—		428			1,326
Total	$	32,086	$	(1,817	)	$	801	$	2,902		$	33,972

The following table details the allowance for loan losses disaggregated on the basis of the Company's impairment method as of June 30, 2018.

	Loans Individually Evaluated for Impairment		Loans Collectively Evaluated for Impairment		PCI Loans		Total Allowance for Loan Losses
	(In thousands)
Commercial business:
Commercial and industrial	$	1,706	$	7,564	$	918	$	10,188
Owner-occupied commercial real estate	1,724		2,736		786		5,246
Non-owner occupied commercial real estate	784		6,118		824		7,726
Total commercial business	4,214		16,418		2,528		23,160
One-to-four family residential	90		879		152		1,121
Real estate construction and land development:
One-to-four family residential	5		787		224		1,016
Five or more family residential and commercial properties	—		957		87		1,044
Total real estate construction and land development	5		1,744		311		2,060
Consumer	74		5,601		630		6,305
Unallocated	—		1,326		—		1,326
Total	$	4,383	$	25,968	$	3,621	$	33,972

Schedule of loan receivables on the basis of impairment method

The following table details the recorded investment balance of the loan receivables disaggregated on the basis of the Company’s impairment method as of December 31, 2017:

	Loans Individually Evaluated for Impairment		Loans Collectively Evaluated for Impairment		PCI Loans		Total Gross Loans Receivable
	(In thousands)
Commercial business:
Commercial and industrial	$	11,999	$	630,485	$	2,912	$	645,396
Owner-occupied commercial real estate	6,808		603,827		11,515		622,150
Non-owner occupied commercial real estate	16,019		957,233		13,342		986,594
Total commercial business	34,826		2,191,545		27,769		2,254,140
One-to-four family residential	299		81,443		5,255		86,997
Real estate construction and land development:
One-to-four family residential	1,247		50,649		89		51,985
Five or more family residential and commercial properties	645		94,819		2,035		97,499
Total real estate construction and land development	1,892		145,468		2,124		149,484
Consumer	442		349,194		5,455		355,091
Total	$	37,459	$	2,767,650	$	40,603	$	2,845,712

The following table details the recorded investment balance of the loan receivables disaggregated on the basis of the Company’s impairment method as of June 30, 2018:

	Loans Individually Evaluated for Impairment		Loans Collectively Evaluated for Impairment		PCI Loans		Total Gross Loans Receivable
	(In thousands)
Commercial business:
Commercial and industrial	$	17,954	$	778,270	$	3,819	$	800,043
Owner-occupied commercial real estate	12,184		672,541		8,605		693,330
Non-owner occupied commercial real estate	10,585		1,165,930		11,033		1,187,548
Total commercial business	40,723		2,616,741		23,457		2,680,921
One-to-four family residential	291		88,394		3,833		92,518
Real estate construction and land development:
One-to-four family residential	1,084		70,459		391		71,934
Five or more family residential and commercial properties	—		93,304		11		93,315
Total real estate construction and land development	1,084		163,763		402		165,249
Consumer	382		381,445		4,160		385,987
Total	$	42,480	$	3,250,343	$	31,852	$	3,324,675

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Other Real Estate Owned (Tables)

6 Months Ended

Jun. 30, 2018

Real Estate [Abstract]

Changes in other real estate owned

Changes in other real estate owned during the three and six months ended June 30, 2017 were as follows:

	Three Months Ended June 30,				Six Months Ended June 30,
	2018		2017		2018		2017
	(In thousands)
Balance at the beginning of the period	$	—	$	786	$	—	$	754
Additions	434		—		434		32
Balance at the end of the period	$	434	$	786	$	434	$	786

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Goodwill and Other Intangible Assets (Tables)

6 Months Ended

Jun. 30, 2018

Goodwill and Intangible Assets Disclosure [Abstract]

Change in goodwill

The following table presents the change in goodwill for the periods indicated:

	Three Months Ended June 30,				Six Months Ended June 30,
	2018		2017		2018		2017
	(In thousands)
Balance at the beginning of the period	$	187,549	$	119,029	$	119,029	$	119,029
Additions as a result of acquisitions (1)	—		—		68,520		—
Balance at the end of the period	$	187,549	$	119,029	$	187,549	$	119,029

⁽¹⁾ See Note (2) Business Combination

Change in other intangible assets

The following table presents the change in other intangible assets for the periods indicated:

	Three Months Ended June 30,						Six Months Ended June 30,
	2018			2017			2018			2017
	(In thousands)
Balance at the beginning of the period	$	16,563		$	7,050		$	6,088		$	7,374
Additions as a result of acquisitions (1)	—			—			11,270			—
Amortization	(796		)	(323		)	(1,591		)	(647		)
Balance at the end of the period	$	15,767		$	6,727		$	15,767		$	6,727

⁽¹⁾ See Note (2) Business Combination

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Junior Subordinated Debentures (Tables)

6 Months Ended

Jun. 30, 2018

Debt Disclosure [Abstract]

Schedule of weighted average rate of junior subordinated debentures

The weighted average rate of the junior subordinated debentures was as follows for the indicated periods:

	Three Months Ended June 30,				Six Months Ended June 30,
	2018		2017		2018		2017
Weighted average rate (1)	6.28	%	5.04	%	6.01	%	4.96	%

⁽¹⁾ The weighted average rate includes the accretion of the discount established at the merger date which is amortized over the life of the trust preferred securities.

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Repurchase Agreements (Tables)

6 Months Ended

Jun. 30, 2018

Disclosure of Repurchase Agreements [Abstract]

Repurchase agreement obligations by class of collateral pledged

The following table presents the Company's repurchase agreement obligations by class of collateral pledged:

	June 30, 2018		December 31, 2017
	(In thousands)
Mortgage-backed securities and collateralized mortgage obligations(1):
Residential	$	10,444	$	11,239
Commercial	11,724		20,582
Total repurchase agreements	$	22,168	$	31,821

⁽¹⁾ Issued and guaranteed by U.S. Government-sponsored agencies.

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Other Borrowings (Tables)

6 Months Ended

Jun. 30, 2018

Debt Disclosure [Abstract]

Schedule of FHLB advances

The following table sets forth the details of FHLB advances during the three and six months ended June 30, 2018 and 2017:

	Three Months Ended June 30,						Six Months Ended June 30,
	2018			2017			2018			2017
	(In thousands)
FHLB Advances:
Average balance during the period	$	79,115		$	107,125		$	57,544		$	104,144
Maximum month-end balance during the period	$	154,500		$	137,450		$	154,500		$	137,450
Weighted average rate during the period	2.04		%	0.89		%	1.93		%	0.86		%

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Derivative Financial Instruments (Tables)

6 Months Ended

Jun. 30, 2018

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule of notional amounts and estimated fair values of interest rate derivative contracts

The notional amounts and estimated fair values of interest rate derivative contracts outstanding at June 30, 2018 and December 31, 2017 are presented in the following table.

	June 30, 2018					December 31, 2017
	Notional Amounts		Estimated Fair Value			Notional Amounts		Estimated Fair Value
	(In thousands)
Non-hedging interest rate derivatives
Interest rate swaps with customer (1)	$	163,257	$	(5,454	)	$	146,537	$	(882	)
Interest rate swap with third party (1)	163,257		5,454			146,537		882

⁽¹⁾ The estimated fair value of the derivative included in prepaid and other assets on the Condensed Consolidated Statements of Financial Condition was $6.6 million and $3.4 million as of June 30, 2018 and December 31, 2017, respectively. The estimated fair value of the derivative included in accrued expenses and other liabilities on the Condensed Consolidated Statements of Financial Condition was $6.6 million and $3.4 million as of June 30, 2018 and December 31, 2017, respectively.

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Stockholders' Equity (Tables)

6 Months Ended

Jun. 30, 2018

Stockholders' Equity Note [Abstract]

Schedule of earnings per share reconciliation

The following table illustrates the reconciliation of weighted average shares used for earnings per common share computations for the three and six months ended June 30, 2018 and 2017:

	Three Months Ended June 30,						Six Months Ended June 30,
	2018			2017			2018			2017
	(Dollars in thousands)
Net income:
Net income	$	11,857		$	11,828		$	20,944		$	21,144
Less: Dividends and undistributed earnings allocated to participating securities	(57		)	(83		)	(110		)	(164		)
Net income allocated to common shareholders	$	11,800		$	11,745		$	20,834		$	20,980
Basic:
Weighted average common shares outstanding	34,023,566			29,939,280			33,680,014			29,945,641
Less: Restricted stock awards	(88,905		)	(183,082		)	(107,897		)	(215,446		)
Total basic weighted average common shares outstanding	33,934,661			29,756,198			33,572,117			29,730,195
Diluted:
Basic weighted average common shares outstanding	33,934,661			29,756,198			33,572,117			29,730,195
Effect of potentially dilutive common shares (1)	172,631			83,411			157,819			64,042
Total diluted weighted average common shares outstanding	34,107,292			29,839,609			33,729,936			29,794,237

⁽¹⁾  Represents the effect of the assumed exercise of stock options and vesting of restricted stock units.

Schedule of dividends activity

The following table summarizes the dividend activity for the six months ended June 30, 2018 and calendar year 2017.

Declared	Cash Dividend per Share	Record Date	Paid Date
January 25, 2017	$0.12	February 9, 2017	February 23, 2017
April 25, 2017	$0.13	May 10, 2017	May 24, 2017
July 25, 2017	$0.13	August 10, 2017	August 24, 2017
October 25, 2017	$0.13	November 8, 2017	November 22, 2017
October 25, 2017	$0.10	November 8, 2017	November 22, 2017	*
January 24, 2018	$0.15	February 7, 2018	February 21, 2018
April 25, 2018	$0.15	May 10, 2018	May 24, 2018

* Denotes a special dividend.

Schedule of repurchased shares

The following table provides total repurchased shares for the periods indicated:

	Three Months Ended June 30,				Six Months Ended June 30,
	2018		2017		2018		2017
Repurchased shares to pay withholding taxes (1)	7,394		11,476		52,820		27,367
Stock repurchase to pay withholding taxes average share price	$	33.84	$	25.50	$	31.96	$	24.60

⁽¹⁾ During the six months ended June 30, 2018, the Company repurchased 26,741 of shares related to the withholding taxes due on the accelerated vesting of the restricted stock units of Puget Sound which were converted to Heritage common stock shares with an average share price of $31.80 under the terms of the merger. See Note (2) Business Combination.

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Accumulated Other Comprehensive (Loss) Income (Tables)

6 Months Ended

Jun. 30, 2018

Equity [Abstract]

Changes in accumulated other comprehensive (loss) income (AOCI) by component

The changes in accumulated other comprehensive (loss) income (“AOCI”), all of which are due to changes in the fair value of available for sale securities and are net of tax, during the three and six months ended June 30, 2018 and 2017 are as follows:

	Three Months Ended						Six Months Ended
	2018			2017			2018			2017
	(In thousands)
Balance of AOCI at the beginning of period	$	(8,934	)	$	(1,133	)	$	(1,298	)	$	(2,606	)
Other comprehensive (loss) income before reclassification	(2,358		)	2,766			(9,874		)	4,239
Amounts reclassified from AOCI for gain on sale of investment securities included in net income	(14		)	(76		)	(41		)	(76		)
Net current period other comprehensive (loss) income	(2,372		)	2,690			(9,915		)	4,163
ASU 2016-01 implementation	—			—			(93		)	—
Balance of AOCI at the end of period	$	(11,306	)	$	1,557		$	(11,306	)	$	1,557

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Fair Value Measurements (Tables)

6 Months Ended

Jun. 30, 2018

Fair Value Disclosures [Abstract]

Fair value measurements of assets on a recurring basis

The following tables summarize the balances of assets and liabilities measured at fair value on a recurring basis as of June 30, 2018 and December 31, 2017.

	June 30, 2018
	Total		Level 1		Level 2		Level 3
	(In thousands)
Assets
Investment securities available for sale:
U.S. Treasury and U.S. Government-sponsored agencies	$	52,064	$	—	$	52,064	$	—
Municipal securities	203,022		—		203,022		—
Mortgage-backed securities and collateralized mortgage obligations:
Residential	312,122		—		312,122		—
Commercial	250,221		—		250,221		—
Collateralized loan obligations	2,256		—		2,256		—
Corporate obligations	25,690		—		25,690		—
Other asset-backed securities	28,295		—		28,295		—
Total investment securities available for sale	873,670		—		873,670		—
Derivative assets - interest rate swaps	6,629		—		6,629		—
Liabilities
Derivative liabilities - interest rate swaps	$	6,629	$	—	$	6,629	$	—

	December 31, 2017
	Total		Level 1		Level 2		Level 3
	(In thousands)
Assets
Investment securities available for sale:
U.S. Treasury and U.S. Government-sponsored agencies	$	13,442	$	—	$	13,442	$	—
Municipal securities	250,015		—		250,015		—
Mortgage-backed securities and collateralized mortgage obligations:
Residential	280,211		—		280,211		—
Commercial	217,079		—		217,079		—
Collateralized loan obligations	4,580		—		4,580		—
Corporate obligations	16,770		—		16,770		—
Other securities	28,433		146		28,287		—
Total investment securities available for sale	810,530		146		810,384		—
Derivative assets - interest rate swaps	3,418		—		3,418		—
Liabilities
Derivative liabilities - interest rate swaps	$	3,418	$	—	$	3,418	$	—

Fair value measurements of assets on a nonrecurring basis

The tables below represent assets measured at fair value on a nonrecurring basis at June 30, 2018 and December 31, 2017 and the net losses recorded in earnings during three and six months ended June 30, 2018 and 2017.

	Basis(1)		Fair Value at June 30, 2018
			Total		Level 1		Level 2		Level 3		Net Losses (Gains) Recorded in Earnings  During the Three Months Ended June 30, 2018		Net Losses (Gains) Recorded in Earnings  During the Six Months Ended June 30, 2018
	(In thousands)
Impaired loans:
Real estate construction and land development:
One-to-four family residential	$	976	$	304	$	—	$	—	$	304	$	3	3
Total assets measured at fair value on a nonrecurring basis	$	976	$	304	$	—	$	—	$	304	$	3	$	3

⁽¹⁾  Basis represents the unpaid principal balance of impaired loans.

	Basis(1)		Fair Value at December 31, 2017
			Total		Level 1		Level 2		Level 3		Net Losses Recorded in Earnings  During the Three Months Ended June 30, 2017		Net Losses (Gains) Recorded in Earnings  During the Six Months Ended June 30, 2017
	(In thousands)
Impaired loans:
Real estate construction and land development:
One-to-four family residential	$	976	$	307	$	—	$	—	$	307	$	—	—
Total assets measured at fair value on a nonrecurring basis	$	976	$	307	$	—	$	—	$	307	$	—	$	—

⁽¹⁾  Basis represents the unpaid principal balance of impaired loans.

Fair value measurements for financial instruments measured at fair value on a non-recurring basis

The following table presents quantitative information about Level 3 fair value measurements for financial instruments measured at fair value on a non-recurring basis at June 30, 2018 and December 31, 2017.

	June 30, 2018
	Fair Value		Valuation Technique(s)	Unobservable Input(s)	Range of Inputs; Weighted Average
	(Dollars in thousands)
Impaired loans	$	304	Market approach	Adjustment for differences between the comparable sales	(91.2%) - (14.4)%; (44.0%)

	December 31, 2017
	Fair Value		Valuation Technique(s)	Unobservable Input(s)	Range of Inputs; Weighted Average
	(Dollars in thousands)
Impaired loans	$	307	Market approach	Adjustment for differences between the comparable sales	(91.5%) - (14.4%); (44.0%)

Schedule of carrying value and fair value of financial instruments

The tables below present the carrying value amount of the Company’s financial instruments and their corresponding estimated fair values at the dates indicated.

	June 30, 2018
	Carrying Value		Fair Value		Fair Value Measurements Using:
					Level 1		Level 2		Level 3
	(In thousands)
Financial Assets:
Cash and cash equivalents	$	129,943	$	129,943	$	129,943	$	—	$	—
Investment securities available for sale	873,670		873,670		—		873,670		—
Federal Home Loan Bank stock	8,616		N/A		N/A		N/A		N/A
Loans held for sale	3,598		3,708		—		3,708		—
Total loans receivable, net	$	3,294,316	$	3,277,881	$	—	$	—	$	3,277,881
Accrued interest receivable	13,482		13,482		28		3,826		9,628
Derivative assets - interest rate swaps	6,629		6,629		—		6,629		—
Equity security	162		162		162		—		—
Financial Liabilities:
Noninterest deposits, interest bearing demand deposits, money market accounts and savings accounts	3,508,300		3,508,300		3,508,300		—		—
Certificate of deposit accounts	460,635		463,971		—		463,971		—
Federal Home Loan Bank advances	75,500		75,500		—		75,500		—
Securities sold under agreement to repurchase	22,168		22,168		22,168		—		—
Junior subordinated debentures	20,156		20,000		—		—		20,000
Accrued interest payable	198		198		46		107		45
Derivative liabilities - interest rate swaps	6,629		6,629		—		6,629		—

	December 31, 2017
	Carrying Value		Fair Value		Fair Value Measurements Using:
					Level 1		Level 2		Level 3
	(In thousands)
Financial Assets:
Cash and cash equivalents	$	103,015	$	103,015	$	103,015	$	—	$	—
Investment securities available for sale	810,530		810,530		146		810,384		—
Federal Home Loan Bank stock	8,347		N/A		N/A		N/A		N/A
Loans held for sale	2,288		2,364		—		2,364		—
Loans receivable, net of allowance for loan losses	2,816,985		2,810,401		—		—		2,810,401
Accrued interest receivable	12,244		12,244		23		3,772		8,449
Derivative assets - interest rate swaps	3,418		3,418		—		3,418		—
Financial Liabilities:
Noninterest deposits, interest bearing demand deposits, money market accounts and savings accounts	$	2,994,662	$	2,994,662	$	2,994,662	$	—	$	—
Certificate of deposit accounts	398,398		397,039		—		397,039		—
Federal Home Loan Bank advances	92,500		92,500		—		92,500		—
Securities sold under agreement to repurchase	31,821		31,821		31,821		—		—
Junior subordinated debentures	20,009		18,500		—		—		18,500
Accrued interest payable	162		162		45		79		38
Derivative liabilities - interest rate swaps	3,418		3,418		—		3,418		—

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Stock-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2018

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Schedule of stock option activity

The following table summarizes the stock option activity for the six months ended June 30, 2018 and 2017:

	Shares		Weighted-Average Exercise Price		Weighted-Average Remaining Contractual Term (In years)	Aggregate Intrinsic Value (In thousands)
Outstanding at December 31, 2016	37,495		$	13.77
Exercised	(8,372	)	13.03
Forfeited or expired	(1,308	)	13.53
Outstanding, vested and expected to vest and exercisable at June 30, 2017	27,815		$	14.00	2.63	$	348
Outstanding at December 31, 2017	23,231		$	14.21
Exercised	(4,042	)	11.55
Forfeited or expired	(831	)	14.77
Outstanding, vested and expected to vest and exercisable at June 30, 2018	18,358		$	14.77	1.90	$	369

Schedule of restricted stock award activity

The following table summarizes the restricted stock award activity for the six months ended June 30, 2018 and 2017:

	Shares		Weighted-Average Grant Date Fair Value
Nonvested at December 31, 2016	261,296		$	16.80
Vested	(105,972	)	16.47
Forfeited	(7,704	)	16.78
Nonvested at June 30, 2017	147,620		$	17.04
Nonvested at December 31, 2017	137,399		$	17.00
Vested	(66,193	)	16.67
Forfeited	(2,394	)	16.86
Nonvested at June 30, 2018	68,812		$	17.32

Summary of assumptions used for restricted stock unit grants

The Company used the following assumptions to estimate the fair value of PRSUs granted during February 2018 and 2017:

	2018		2017
Shares issued	5,550		6,089
Expected Term in Years	2.84		2.85
Weighted-Average Risk Free Interest Rate	2.39	%	1.40	%
Expected Dividend Yield	—	%	—	%
Weighted-Average Fair Value	27.69		24.39
Correlation coefficient	ABA NASDAQ Community Bank Index		ABA NASDAQ Community Bank Index
Range of peer company volatilities	18.99% - 51.42%		17.8% - 63.1%
Range of peer company correlation coefficients	28.16% - 94.29%		8.24% - 89.79%
Heritage volatility	22.3	%	21.8	%
Heritage correlation coefficient	76.44	%	75.93	%

Schedule of restricted stock unit activity

The following table summarizes the unit activity for the six months ended June 30, 2018 and 2017:

	Shares		Weighted-Average Grant Date Fair Value
Nonvested at December 31, 2016	—		$	—
Granted	92,019		25.29
Forfeited	(909	)	25.35
Nonvested at June 30, 2017	91,110		$	25.29
Nonvested at December 31, 2017	90,544		$	25.31
Granted	114,015		30.61
Vested	(32,262	)	25.42
Forfeited	(3,644	)	27.87
Nonvested at June 30, 2018	168,653		$	28.51

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Description of Business, Basis of Presentation and Significant Accounting Policies and Recently Issued Accounting Pronouncements - Description of Business (Details)	Jun. 30, 2018 branch
Heritage Bank
Business Description and Basis of Presentation [Line Items]
Number of branches operating	59

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Description of Business, Basis of Presentation and Significant Accounting Policies and Recently Issued Accounting Pronouncements - Recently Issued Accounting Pronouncements (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017	Dec. 31, 2016
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative adjustment			$ 0
Minimum lease payments	$ 13,700
Retained earnings
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative adjustment			93
Accumulated other comprehensive loss, net
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative adjustment		$ 0	$ (93)	$ 0	$ 0

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Business Combination - Textual (Details) - USD ($) $ / shares in Units, $ in Thousands			3 Months Ended		6 Months Ended
	Jan. 16, 2018	Jan. 12, 2018	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Business Acquisition [Line Items]
Share price (in usd per share)	$ 31.80		$ 31.80		$ 31.80
Number of shares forfeited to pay applicable taxes (in shares)			26,741		26,741
Goodwill			$ 0	$ 0	$ 68,520	$ 0
Puget Sound Bank
Business Acquisition [Line Items]
Number of shares issued (in shares)	1.1688
Number of shares issued		4,112,258
Share price (in usd per share)		$ 31.80
Fair value of shares issued	$ 130,800
Share price paid in cash (in usd per share)	$ 3,000
Total consideration paid	$ 130,773
Total fair value of shares forfeited to pay applicable taxes	$ 851
Number of shares forfeited to pay applicable taxes (in shares)	26,741
Goodwill	$ 68,520				68,500
Acquisition-related costs			$ 551		$ 5,000

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Business Combination - Fair Value Estimates of Assets Acquired and Liabilities Assumed (Details) - Puget Sound Bank $ in Thousands	Jan. 16, 2018 USD ($)
Assets
Cash and cash equivalents	$ 25,889
Interest earning deposits	54,247
Investment securities available for sale	80,353
Loans receivable	388,462
Premises and equipment, net	732
Federal Home Loan Bank stock, at cost	623
Bank owned life insurance	6,264
Accrued interest receivable	1,448
Prepaid expenses and other assets	1,354
Other intangible assets	11,270
Total assets acquired	570,642
Liabilities
Deposits	505,885
Total liabilities acquired	2,504
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities	508,389
Fair value of net assets acquired	$ 62,253

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Business Combination - Summary of Fair Value Adjustments and Goodwill (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
	Jan. 16, 2018	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Fair value adjustments:
Goodwill recognized from the Puget Sound Merger		$ 0	$ 0	$ (68,520)	$ 0
Puget Sound Bank
Business Acquisition [Line Items]
Cost basis of net assets on merger date	$ 54,405
Consideration transferred	(130,773)
Fair value adjustments:
Investment securities	(348)
Total loans receivable, net	1,400
Premises and equipment	(121)
Other intangible assets	9,207
Prepaid expenses and other assets	(2,282)
Deposits	(62)
Accrued expenses and other liabilities	54
Goodwill recognized from the Puget Sound Merger	$ (68,520)			$ (68,500)

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Business Combination - Results of Operations of Acquired Business (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Business Acquisition [Line Items]
Interest income: Interest and fees on loans	$ 41,141	$ 31,500	$ 79,300	$ 61,985
Interest income: Interest and fees on investments	4,068	3,141	7,597	6,190
Interest income: Other interest earning assets	242	96	460	143
Interest expense	(2,928)	(1,907)	(5,338)	(3,624)
Provision for loan losses for loans	(1,750)	(1,131)	(2,902)	(1,998)
Noninterest income	7,573	10,709	15,121	18,072
Noninterest expense	(35,706)	(27,809)	(72,453)	(55,032)
Income before income taxes	13,860	$ 15,903	24,346	$ 28,308
Puget Sound Bank
Business Acquisition [Line Items]
Interest income: Interest and fees on loans	6,130		10,647
Interest income: Interest and fees on investments	0		59
Interest income: Other interest earning assets	25		113
Interest expense	(180)		(324)
Provision for loan losses for loans	(350)		(550)
Noninterest income	109		257
Noninterest expense	(2,092)		(7,672)
Income before income taxes	3,642		2,530
Accretion of discount on purchased loans	$ 1,100		$ 1,500

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Investment Securities - Amortized Cost, Gross Unrealized Gains and Losses and Fair Values (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Investment Holdings [Line Items]
Amortized Cost	$ 887,997	$ 812,174
Gross Unrealized Gains	2,749	5,483
Gross Unrealized Losses	(17,076)	(7,127)
Fair Value	873,670	810,530
U.S. Treasury and U.S. Government-sponsored agencies
Investment Holdings [Line Items]
Amortized Cost	52,256	13,460
Gross Unrealized Gains	42	6
Gross Unrealized Losses	(234)	(24)
Fair Value	52,064	13,442
Municipal securities
Investment Holdings [Line Items]
Amortized Cost	202,918	247,358
Gross Unrealized Gains	1,366	3,720
Gross Unrealized Losses	(1,262)	(1,063)
Fair Value	203,022	250,015
Residential
Investment Holdings [Line Items]
Amortized Cost	319,492	282,724
Gross Unrealized Gains	352	422
Gross Unrealized Losses	(7,722)	(2,935)
Fair Value	312,122	280,211
Commercial
Investment Holdings [Line Items]
Amortized Cost	257,858	219,696
Gross Unrealized Gains	141	444
Gross Unrealized Losses	(7,778)	(3,061)
Fair Value	250,221	217,079
Collateralized loan obligations
Investment Holdings [Line Items]
Amortized Cost	2,253	4,561
Gross Unrealized Gains	3	19
Gross Unrealized Losses	0	0
Fair Value	2,256	4,580
Corporate obligations
Investment Holdings [Line Items]
Amortized Cost	25,617	16,594
Gross Unrealized Gains	153	220
Gross Unrealized Losses	(80)	(44)
Fair Value	25,690	16,770
Other asset-backed securities
Investment Holdings [Line Items]
Amortized Cost	27,603	27,781
Gross Unrealized Gains	692	652
Gross Unrealized Losses	0	0
Fair Value	$ 28,295	$ 28,433

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Investment Securities - Textual (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2018 USD ($) loan	Jun. 30, 2017 loan	Jun. 30, 2018 USD ($) loan	Jun. 30, 2017 loan	Dec. 31, 2017 USD ($)
Investments, Debt and Equity Securities [Abstract]
Securities classified as trading | $	$ 0		$ 0		$ 0
Mortgage backed securities evaluation non temporary decline number (securities) | loan	0	0	0	0

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Investment Securities - Contractual Maturities (Details) $ in Thousands	Jun. 30, 2018 USD ($)
Amortized Cost
Due in one year or less	$ 24,656
Due after one year through five years	149,590
Due after five years through ten years	254,873
Due after ten years	458,878
Amortized Cost	887,997
Fair Value
Due in one year or less	24,690
Due after one year through five years	148,197
Due after five years through ten years	248,759
Due after ten years	452,024
Fair Value	$ 873,670

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Investment Securities - Unrealized Losses (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Fair Value
Less than 12 Months	$ 420,762	$ 305,174
12 Months or Longer	196,616	183,711
Total	617,378	488,885
Unrealized Losses
Less than 12 Months	(7,867)	(2,448)
12 Months or Longer	(9,209)	(4,679)
Total	(17,076)	(7,127)
U.S. Treasury and U.S. Government-sponsored agencies
Fair Value
Less than 12 Months	34,674	11,436
12 Months or Longer	536	0
Total	35,210	11,436
Unrealized Losses
Less than 12 Months	(223)	(24)
12 Months or Longer	(11)	0
Total	(234)	(24)
Municipal securities
Fair Value
Less than 12 Months	63,443	39,298
12 Months or Longer	22,903	26,509
Total	86,346	65,807
Unrealized Losses
Less than 12 Months	(552)	(384)
12 Months or Longer	(710)	(679)
Total	(1,262)	(1,063)
Residential
Fair Value
Less than 12 Months	178,865	175,847
12 Months or Longer	78,330	66,380
Total	257,195	242,227
Unrealized Losses
Less than 12 Months	(3,954)	(1,296)
12 Months or Longer	(3,768)	(1,639)
Total	(7,722)	(2,935)
Commercial
Fair Value
Less than 12 Months	128,298	75,121
12 Months or Longer	94,847	90,822
Total	223,145	165,943
Unrealized Losses
Less than 12 Months	(3,058)	(700)
12 Months or Longer	(4,720)	(2,361)
Total	(7,778)	(3,061)
Corporate obligations
Fair Value
Less than 12 Months	15,482	3,472
12 Months or Longer	0	0
Total	15,482	3,472
Unrealized Losses
Less than 12 Months	(80)	(44)
12 Months or Longer	0	0
Total	$ (80)	$ (44)

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Investment Securities - Realized Gains and Losses (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Investments, Debt and Equity Securities [Abstract]
Gross realized gains	$ 18	$ 117	$ 122	$ 117
Gross realized losses	0	0	(69)	0
Net realized gains	$ 18	$ 117	$ 53	$ 117

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Investment Securities - Amortized Cost and Fair Value (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Scheduled of amortized cost and fair value of securities pledged as collateral
Amortized Cost	$ 262,558	$ 267,611
Fair Value	257,895	267,160
Washington and Oregon state to secure public deposits
Scheduled of amortized cost and fair value of securities pledged as collateral
Amortized Cost	197,047	206,377
Fair Value	193,946	206,425
Repurchase agreements
Scheduled of amortized cost and fair value of securities pledged as collateral
Amortized Cost	45,463	48,750
Fair Value	44,207	48,237
Other securities pledged
Scheduled of amortized cost and fair value of securities pledged as collateral
Amortized Cost	20,048	12,484
Fair Value	$ 19,742	$ 12,498

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Investment Securities - Equity Securities (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Investments, Debt and Equity Securities [Abstract]
Equity security	$ 162	$ 146

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Loans Receivable - Loan Origination/Risk Management (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2018 USD ($) segment	Mar. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Jun. 30, 2017 USD ($)	Mar. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of loan segments | segment	4
Maximum percentage consumer loans	80.00%
Gross loans receivable	$ 3,324,675		$ 2,845,712
Net deferred loan costs	3,613		3,359
Loans receivable, net	3,328,288		2,849,071
Allowance for loan losses	(33,972)	$ (33,261)	(32,086)	$ (32,751)	$ (31,594)	$ (31,083)
Total loans receivable, net	3,294,316		2,816,985
Commercial Business
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans receivable	2,680,921		2,254,140
Allowance for loan losses	(23,160)	(22,572)	(21,999)	(22,514)	(21,908)	(22,382)
Commercial Business | Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans receivable	800,043		645,396
Allowance for loan losses	(10,188)	(9,943)	(9,910)	(10,651)	(10,091)	(10,968)
Commercial Business | Owner-occupied Commercial Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans receivable	693,330		622,150
Allowance for loan losses	(5,246)	(5,040)	(3,992)	(4,154)	(4,216)	(3,661)
Commercial Business | Non-owner Occupied Commercial Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans receivable	1,187,548		986,594
Allowance for loan losses	$ (7,726)	(7,589)	(8,097)	(7,709)	(7,601)	(7,753)
One-to-four Family Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Maximum percent of appraised value or underlying collateral mortgage (not to exceed 80%) residential loans	80.00%
Gross loans receivable	$ 92,518		86,997
Allowance for loan losses	(1,121)	(1,083)	(1,056)	(1,073)	(1,052)	(1,015)
Real Estate Construction and Land Development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans receivable	165,249		149,484
Allowance for loan losses	(2,060)	(2,056)	(2,052)	(2,487)	(2,337)	(2,156)
Real Estate Construction and Land Development | One-to-four Family Real Estate Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans receivable	71,934		51,985
Allowance for loan losses	(1,016)	(941)	(862)	(821)	(791)	(797)
Real Estate Construction and Land Development | Five or More Family Residential and Commercial Properties
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans receivable	93,315		97,499
Allowance for loan losses	(1,044)	(1,115)	(1,190)	(1,666)	(1,546)	(1,359)
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans receivable	385,987		355,091
Allowance for loan losses	$ (6,305)	$ (6,054)	$ (6,081)	$ (5,710)	$ (5,195)	$ (5,024)
Minimum | One-to-four Family Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan term	15 years
Maximum | One-to-four Family Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan term	30 years

XML

Loans Receivable - Concentrations of Credit (Details)	6 Months Ended	12 Months Ended
	Jun. 30, 2018	Dec. 31, 2017 Loan
Receivables [Abstract]
Concentration of loans greater than 10%	0	0
Percentage of concentrations of loans in any industry (in excess of 10%) (percent)	10.00%	10.00%

XML

Loans Receivable - Credit Quality Indicators (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Financing Receivable, Recorded Investment [Line Items]
Pass	$ 3,186,214	$ 2,730,283
OAEM	51,257	43,942
Substandard	86,679	70,962
Doubtful/Loss	525	525
Total	3,324,675	2,845,712
Potential problem loans receivable	101,500	83,500
Commercial Business
Financing Receivable, Recorded Investment [Line Items]
Pass	2,549,852	2,148,602
OAEM	50,933	42,698
Substandard	80,136	62,840
Doubtful/Loss	0	0
Total	2,680,921	2,254,140
Commercial Business | Commercial and Industrial
Financing Receivable, Recorded Investment [Line Items]
Pass	731,265	597,697
OAEM	23,559	19,536
Substandard	45,219	28,163
Doubtful/Loss	0	0
Total	800,043	645,396
Commercial Business | Owner-occupied Commercial Real Estate
Financing Receivable, Recorded Investment [Line Items]
Pass	656,991	595,455
OAEM	16,402	12,668
Substandard	19,937	14,027
Doubtful/Loss	0	0
Total	693,330	622,150
Commercial Business | Non-owner Occupied Commercial Real Estate
Financing Receivable, Recorded Investment [Line Items]
Pass	1,161,596	955,450
OAEM	10,972	10,494
Substandard	14,980	20,650
Doubtful/Loss	0	0
Total	1,187,548	986,594
One-to-four Family Residential
Financing Receivable, Recorded Investment [Line Items]
Pass	91,264	85,762
OAEM	0	0
Substandard	1,254	1,235
Doubtful/Loss	0	0
Total	92,518	86,997
Real Estate Construction and Land Development
Financing Receivable, Recorded Investment [Line Items]
Pass	163,757	146,329
OAEM	324	1,244
Substandard	1,168	1,911
Doubtful/Loss	0	0
Total	165,249	149,484
Real Estate Construction and Land Development | One-to-four Family Real Estate Construction
Financing Receivable, Recorded Investment [Line Items]
Pass	70,499	49,925
OAEM	267	537
Substandard	1,168	1,523
Doubtful/Loss	0	0
Total	71,934	51,985
Real Estate Construction and Land Development | Five or More Family Residential and Commercial Properties
Financing Receivable, Recorded Investment [Line Items]
Pass	93,258	96,404
OAEM	57	707
Substandard	0	388
Doubtful/Loss	0	0
Total	93,315	97,499
Consumer
Financing Receivable, Recorded Investment [Line Items]
Pass	381,341	349,590
OAEM	0	0
Substandard	4,121	4,976
Doubtful/Loss	525	525
Total	$ 385,987	$ 355,091

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Loans Receivable - Nonaccrual Loans (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross nonaccrual loans	$ 16,523	$ 10,703
Commercial Business
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross nonaccrual loans	15,235	9,098
Commercial Business | Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross nonaccrual loans	8,376	3,110
Commercial Business | Owner-occupied Commercial Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross nonaccrual loans	4,690	4,090
Commercial Business | Non-owner Occupied Commercial Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross nonaccrual loans	2,169	1,898
One-to-four Family Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross nonaccrual loans	77	81
Real Estate Construction and Land Development | One-to-four Family Real Estate Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross nonaccrual loans	1,084	1,247
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross nonaccrual loans	$ 127	$ 277

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Loans Receivable - Past Due Loans (Details) - USD ($)	Jun. 30, 2018	Dec. 31, 2017
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	$ 15,573,000	$ 15,445,000
Current	3,309,102,000	2,830,267,000
Total	3,324,675,000	2,845,712,000
90 days or more and still accruing	0	0
30-89 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	6,983,000	7,716,000
90 Days or Greater
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	8,590,000	7,729,000
Commercial Business
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	13,577,000	10,851,000
Current	2,667,344,000	2,243,289,000
Total	2,680,921,000	2,254,140,000
Commercial Business | 30-89 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	5,349,000	5,140,000
Commercial Business | 90 Days or Greater
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	8,228,000	5,711,000
Commercial Business | Commercial and Industrial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	7,841,000	4,165,000
Current	792,202,000	641,231,000
Total	800,043,000	645,396,000
Commercial Business | Commercial and Industrial | 30-89 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	3,719,000	2,993,000
Commercial Business | Commercial and Industrial | 90 Days or Greater
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	4,122,000	1,172,000
Commercial Business | Owner-occupied Commercial Real Estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	997,000	2,502,000
Current	692,333,000	619,648,000
Total	693,330,000	622,150,000
Commercial Business | Owner-occupied Commercial Real Estate | 30-89 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	129,000	1,277,000
Commercial Business | Owner-occupied Commercial Real Estate | 90 Days or Greater
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	868,000	1,225,000
Commercial Business | Non-owner Occupied Commercial Real Estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	4,739,000	4,184,000
Current	1,182,809,000	982,410,000
Total	1,187,548,000	986,594,000
Commercial Business | Non-owner Occupied Commercial Real Estate | 30-89 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,501,000	870,000
Commercial Business | Non-owner Occupied Commercial Real Estate | 90 Days or Greater
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	3,238,000	3,314,000
One-to-four Family Residential
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	513,000
Current	92,518,000	86,484,000
Total	92,518,000	86,997,000
One-to-four Family Residential | 30-89 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	513,000
One-to-four Family Residential | 90 Days or Greater
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
Real Estate Construction and Land Development
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	309,000	1,455,000
Current	164,940,000	148,029,000
Total	165,249,000	149,484,000
Real Estate Construction and Land Development | 30-89 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	124,000
Real Estate Construction and Land Development | 90 Days or Greater
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	309,000	1,331,000
Real Estate Construction and Land Development | One-to-four Family Real Estate Construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	309,000	1,415,000
Current	71,625,000	50,570,000
Total	71,934,000	51,985,000
Real Estate Construction and Land Development | One-to-four Family Real Estate Construction | 30-89 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	84,000
Real Estate Construction and Land Development | One-to-four Family Real Estate Construction | 90 Days or Greater
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	309,000	1,331,000
Real Estate Construction and Land Development | Five or More Family Residential and Commercial Properties
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	40,000
Current	93,315,000	97,459,000
Total	93,315,000	97,499,000
Real Estate Construction and Land Development | Five or More Family Residential and Commercial Properties | 30-89 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	40,000
Real Estate Construction and Land Development | Five or More Family Residential and Commercial Properties | 90 Days or Greater
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
Consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,687,000	2,626,000
Current	384,300,000	352,465,000
Total	385,987,000	355,091,000
Consumer | 30-89 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,634,000	1,939,000
Consumer | 90 Days or Greater
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	$ 53,000	$ 687,000

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Loans Receivable - Impaired Loans (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Financing Receivable, Impaired [Line Items]
Recorded Investment With No Specific Valuation Allowance	$ 12,136,000		$ 12,136,000		$ 10,399,000
Recorded Investment With Specific Valuation Allowance	30,344,000		30,344,000		27,060,000
Total Recorded Investment	42,480,000		42,480,000		37,459,000
Unpaid Contractual Principal Balance	44,466,000		44,466,000		39,334,000
Related Specific Valuation Allowance	4,383,000		4,383,000		3,355,000
Average recorded investment on impaired loans	42,158,000	$ 25,705,000	40,592,000	$ 28,202,000
Nonaccrual
Financing Receivable, Impaired [Line Items]
Interest income recognized on impaired loans	0	0	0	0
Restructured Performing
Financing Receivable, Impaired [Line Items]
Interest income recognized on impaired loans	360,000	281,000	686,000	646,000
Commercial Business
Financing Receivable, Impaired [Line Items]
Recorded Investment With No Specific Valuation Allowance	11,308,000		11,308,000		9,301,000
Recorded Investment With Specific Valuation Allowance	29,415,000		29,415,000		25,525,000
Total Recorded Investment	40,723,000		40,723,000		34,826,000
Unpaid Contractual Principal Balance	41,876,000		41,876,000		35,715,000
Related Specific Valuation Allowance	4,214,000		4,214,000		3,169,000
Average recorded investment on impaired loans	40,368,000	21,455,000	38,522,000	23,776,000
Commercial Business | Commercial and Industrial
Financing Receivable, Impaired [Line Items]
Recorded Investment With No Specific Valuation Allowance	5,716,000		5,716,000		2,127,000
Recorded Investment With Specific Valuation Allowance	12,238,000		12,238,000		9,872,000
Total Recorded Investment	17,954,000		17,954,000		11,999,000
Unpaid Contractual Principal Balance	18,825,000		18,825,000		12,489,000
Related Specific Valuation Allowance	1,706,000		1,706,000		1,326,000
Average recorded investment on impaired loans	17,299,000	6,925,000	15,534,000	8,742,000
Commercial Business | Owner-occupied Commercial Real Estate
Financing Receivable, Impaired [Line Items]
Recorded Investment With No Specific Valuation Allowance	930,000		930,000		2,452,000
Recorded Investment With Specific Valuation Allowance	11,254,000		11,254,000		4,356,000
Total Recorded Investment	12,184,000		12,184,000		6,808,000
Unpaid Contractual Principal Balance	12,493,000		12,493,000		7,054,000
Related Specific Valuation Allowance	1,724,000		1,724,000		621,000
Average recorded investment on impaired loans	12,643,000	3,278,000	12,622,000	3,760,000
Commercial Business | Non-owner Occupied Commercial Real Estate
Financing Receivable, Impaired [Line Items]
Recorded Investment With No Specific Valuation Allowance	4,662,000		4,662,000		4,722,000
Recorded Investment With Specific Valuation Allowance	5,923,000		5,923,000		11,297,000
Total Recorded Investment	10,585,000		10,585,000		16,019,000
Unpaid Contractual Principal Balance	10,558,000		10,558,000		16,172,000
Related Specific Valuation Allowance	784,000		784,000		1,222,000
Average recorded investment on impaired loans	10,426,000	11,252,000	10,366,000	11,274,000
One-to-four Family Residential
Financing Receivable, Impaired [Line Items]
Recorded Investment With No Specific Valuation Allowance	0		0		0
Recorded Investment With Specific Valuation Allowance	291,000		291,000		299,000
Total Recorded Investment	291,000		291,000		299,000
Unpaid Contractual Principal Balance	301,000		301,000		308,000
Related Specific Valuation Allowance	90,000		90,000		93,000
Average recorded investment on impaired loans	293,000	312,000	295,000	315,000
Real Estate Construction and Land Development
Financing Receivable, Impaired [Line Items]
Recorded Investment With No Specific Valuation Allowance	775,000		775,000		938,000
Recorded Investment With Specific Valuation Allowance	309,000		309,000		954,000
Total Recorded Investment	1,084,000		1,084,000		1,892,000
Unpaid Contractual Principal Balance	1,842,000		1,842,000		2,845,000
Related Specific Valuation Allowance	5,000		5,000		39,000
Average recorded investment on impaired loans	1,116,000	3,703,000	1,374,000	3,851,000
Real Estate Construction and Land Development | One-to-four Family Real Estate Construction
Financing Receivable, Impaired [Line Items]
Recorded Investment With No Specific Valuation Allowance	775,000		775,000		938,000
Recorded Investment With Specific Valuation Allowance	309,000		309,000		309,000
Total Recorded Investment	1,084,000		1,084,000		1,247,000
Unpaid Contractual Principal Balance	1,842,000		1,842,000		2,200,000
Related Specific Valuation Allowance	5,000		5,000		2,000
Average recorded investment on impaired loans	1,116,000	2,636,000	1,159,000	2,781,000
Real Estate Construction and Land Development | Five or More Family Residential and Commercial Properties
Financing Receivable, Impaired [Line Items]
Recorded Investment With No Specific Valuation Allowance					0
Recorded Investment With Specific Valuation Allowance					645,000
Total Recorded Investment					645,000
Unpaid Contractual Principal Balance					645,000
Related Specific Valuation Allowance					37,000
Average recorded investment on impaired loans	0	1,067,000	215,000	1,070,000
Consumer
Financing Receivable, Impaired [Line Items]
Recorded Investment With No Specific Valuation Allowance	53,000		53,000		160,000
Recorded Investment With Specific Valuation Allowance	329,000		329,000		282,000
Total Recorded Investment	382,000		382,000		442,000
Unpaid Contractual Principal Balance	447,000		447,000		466,000
Related Specific Valuation Allowance	74,000		74,000		$ 54,000
Average recorded investment on impaired loans	$ 381,000	$ 235,000	$ 401,000	$ 260,000

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Loans Receivable - TDR Loans, Recorded Investment and Allowance (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Receivables [Abstract]
Performing TDRs, TDR loans	$ 25,957	$ 26,757
Nonaccrual TDRs, TDR loans	6,761	5,193
Performing TDRs, Allowance for loan losses on TDR loans	2,492	2,635
Nonaccrual TDRs, Allowance for loan losses on TDR loans	726	379
Unfunded commitments related to credits classified as TDRs	$ 1,000	$ 1,200

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Loans Receivable - Modified TDRs (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018 USD ($) contract	Jun. 30, 2017 USD ($) contract	Jun. 30, 2018 USD ($) contract	Jun. 30, 2017 USD ($) contract	Dec. 31, 2017 USD ($)
Loans Modified as Troubled Debt Restructurings [Abstract]
Related specific valuation allowance | $	$ 4,383		$ 4,383		$ 3,355
Troubled Debt Restructured Loans
Loans Modified as Troubled Debt Restructurings [Abstract]
Number of Contracts | contract	13	9	26	18
Outstanding Principal Balance | $	$ 3,584	$ 5,141	$ 9,250	$ 7,822
Number of contracts modified | contract	4	3	8	4
Troubled Debt Restructured Loans | Past Modified Maturity Date
Loans Modified as Troubled Debt Restructurings [Abstract]
Number of contracts modified | contract	2	3	6	4
Troubled Debt Restructured Loans | 90 Days or Greater Past Due
Loans Modified as Troubled Debt Restructurings [Abstract]
Number of contracts modified | contract	2		2
Troubled Debt Restructured Loans | Modified During the Quarter
Loans Modified as Troubled Debt Restructurings [Abstract]
Related specific valuation allowance | $	$ 738		$ 738
Commercial Business
Loans Modified as Troubled Debt Restructurings [Abstract]
Related specific valuation allowance | $	$ 4,214		$ 4,214		3,169
Commercial Business | Troubled Debt Restructured Loans
Loans Modified as Troubled Debt Restructurings [Abstract]
Number of Contracts | contract	10	6	20	12
Outstanding Principal Balance | $	$ 3,551	$ 4,386	$ 9,143	$ 5,915
Number of contracts modified | contract	4	0	6	1
Commercial Business | Commercial and Industrial
Loans Modified as Troubled Debt Restructurings [Abstract]
Related specific valuation allowance | $	$ 1,706		$ 1,706		1,326
Commercial Business | Commercial and Industrial | Troubled Debt Restructured Loans
Loans Modified as Troubled Debt Restructurings [Abstract]
Number of Contracts | contract	9	5	17	10
Outstanding Principal Balance | $	$ 2,981	$ 3,439	$ 6,193	$ 4,913
Number of contracts modified | contract	4	0	5	1
Commercial Business | Owner-occupied Commercial Real Estate
Loans Modified as Troubled Debt Restructurings [Abstract]
Related specific valuation allowance | $	$ 1,724		$ 1,724		621
Commercial Business | Owner-occupied Commercial Real Estate | Troubled Debt Restructured Loans
Loans Modified as Troubled Debt Restructurings [Abstract]
Number of Contracts | contract	1	0	1	1
Outstanding Principal Balance | $	$ 570	$ 0	$ 570	$ 54
Number of contracts modified | contract			1	0
Commercial Business | Non-owner Occupied Commercial Real Estate
Loans Modified as Troubled Debt Restructurings [Abstract]
Related specific valuation allowance | $	$ 784		$ 784		1,222
Commercial Business | Non-owner Occupied Commercial Real Estate | Troubled Debt Restructured Loans
Loans Modified as Troubled Debt Restructurings [Abstract]
Number of Contracts | contract	0	1	2	1
Outstanding Principal Balance | $	$ 0	$ 947	$ 2,380	$ 948
Real Estate Construction and Land Development
Loans Modified as Troubled Debt Restructurings [Abstract]
Related specific valuation allowance | $	$ 5		$ 5		39
Number of contracts modified | contract			2	0
Real Estate Construction and Land Development | Troubled Debt Restructured Loans
Loans Modified as Troubled Debt Restructurings [Abstract]
Number of Contracts | contract	0	2	0	4
Outstanding Principal Balance | $	$ 0	$ 745	$ 0	$ 1,889
Real Estate Construction and Land Development | One-to-four Family Real Estate Construction
Loans Modified as Troubled Debt Restructurings [Abstract]
Related specific valuation allowance | $	$ 5		$ 5		2
Real Estate Construction and Land Development | One-to-four Family Real Estate Construction | Troubled Debt Restructured Loans
Loans Modified as Troubled Debt Restructurings [Abstract]
Number of Contracts | contract	0	2	0	4
Outstanding Principal Balance | $	$ 0	$ 745	$ 0	$ 1,889
Number of contracts modified | contract			2	0
Consumer
Loans Modified as Troubled Debt Restructurings [Abstract]
Related specific valuation allowance | $	$ 74		$ 74		$ 54
Consumer | Troubled Debt Restructured Loans
Loans Modified as Troubled Debt Restructurings [Abstract]
Number of Contracts | contract	3	1	6	2
Outstanding Principal Balance | $	$ 33	$ 10	$ 107	$ 18
Number of contracts modified | contract	0	3	0	3

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Loans Receivable - TDRs Subsequently Defaulted (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018 USD ($) contract	Jun. 30, 2017 USD ($) contract	Jun. 30, 2018 USD ($) contract	Jun. 30, 2017 USD ($) contract
Real Estate Construction and Land Development
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract			2	0
Outstanding Principal Balance | $			$ 775	$ 0
Troubled Debt Restructured Loans
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	4	3	8	4
Outstanding Principal Balance | $	$ 2,725	$ 36	$ 3,854	$ 270
Troubled Debt Restructured Loans | Commercial Business
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	4	0	6	1
Outstanding Principal Balance | $	$ 2,725	$ 0	$ 3,079	$ 234
Troubled Debt Restructured Loans | Commercial Business | Commercial and Industrial
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	4	0	5	1
Outstanding Principal Balance | $	$ 2,725	$ 0	$ 3,006	$ 234
Troubled Debt Restructured Loans | Commercial Business | Owner-occupied Commercial Real Estate
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract			1	0
Outstanding Principal Balance | $			$ 73	$ 0
Troubled Debt Restructured Loans | Real Estate Construction and Land Development | One-to-four Family Real Estate Construction
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract			2	0
Outstanding Principal Balance | $			$ 775	$ 0
Troubled Debt Restructured Loans | Consumer
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	0	3	0	3
Outstanding Principal Balance | $	$ 0	$ 36	$ 0	$ 36

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Loans Receivable - Purchased Credit Impaired Loans (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Financing Receivable, Impaired [Line Items]
Outstanding Principal	$ 36,522	$ 46,639
Recorded Investment	31,852	40,603
Commercial Business
Financing Receivable, Impaired [Line Items]
Outstanding Principal	29,589	35,343
Recorded Investment	23,457	27,769
Commercial Business | Commercial and Industrial
Financing Receivable, Impaired [Line Items]
Outstanding Principal	7,307	8,818
Recorded Investment	3,819	2,912
Commercial Business | Owner-occupied Commercial Real Estate
Financing Receivable, Impaired [Line Items]
Outstanding Principal	9,737	12,230
Recorded Investment	8,605	11,515
Commercial Business | Non-owner Occupied Commercial Real Estate
Financing Receivable, Impaired [Line Items]
Outstanding Principal	12,545	14,295
Recorded Investment	11,033	13,342
One-to-four Family Residential
Financing Receivable, Impaired [Line Items]
Outstanding Principal	3,701	4,120
Recorded Investment	3,833	5,255
Real Estate Construction and Land Development
Financing Receivable, Impaired [Line Items]
Outstanding Principal	300	3,202
Recorded Investment	402	2,124
Real Estate Construction and Land Development | One-to-four Family Real Estate Construction
Financing Receivable, Impaired [Line Items]
Outstanding Principal	107	841
Recorded Investment	391	89
Real Estate Construction and Land Development | Five or More Family Residential and Commercial Properties
Financing Receivable, Impaired [Line Items]
Outstanding Principal	193	2,361
Recorded Investment	11	2,035
Consumer
Financing Receivable, Impaired [Line Items]
Outstanding Principal	2,932	3,974
Recorded Investment	$ 4,160	$ 5,455

XML

Loans Receivable - Change in Accretable Yield (Details) - PCI Loans - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward]
Balance at the beginning of the period	$ 11,269	$ 13,132	$ 11,224	$ 13,860
Accretion	(587)	(935)	(1,368)	(1,929)
Disposal and other	(273)	(653)	(1,971)	(1,143)
Change in accretable yield	(349)	752	2,175	1,508
Balance at the end of the period	$ 10,060	$ 12,296	$ 10,060	$ 12,296

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Allowance for Loan Losses - Summary of Changes in Loan Allowance (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Schedule of changes in allowance for loan losses
Balance at Beginning of Period	$ 33,261	$ 31,594	$ 32,086	$ 31,083
Charge-offs	(1,251)	(539)	(1,817)	(1,384)
Recoveries	212	565	801	1,054
Provision for Loan Losses	1,750	1,131	2,902	1,998
Balance at End of Period	33,972	32,751	33,972	32,751
Commercial Business
Schedule of changes in allowance for loan losses
Balance at Beginning of Period	22,572	21,908	21,999	22,382
Charge-offs	(542)	(141)	(623)	(443)
Recoveries	68	454	569	826
Provision for Loan Losses	1,062	293	1,215	(251)
Balance at End of Period	23,160	22,514	23,160	22,514
Commercial Business | Commercial and Industrial
Schedule of changes in allowance for loan losses
Balance at Beginning of Period	9,943	10,091	9,910	10,968
Charge-offs	(541)	(63)	(622)	(358)
Recoveries	65	452	564	675
Provision for Loan Losses	721	171	336	(634)
Balance at End of Period	10,188	10,651	10,188	10,651
Commercial Business | Owner-occupied Commercial Real Estate
Schedule of changes in allowance for loan losses
Balance at Beginning of Period	5,040	4,216	3,992	3,661
Charge-offs	(1)	(78)	(1)	(85)
Recoveries	3	2	5	151
Provision for Loan Losses	204	14	1,250	427
Balance at End of Period	5,246	4,154	5,246	4,154
Commercial Business | Non-owner Occupied Commercial Real Estate
Schedule of changes in allowance for loan losses
Balance at Beginning of Period	7,589	7,601	8,097	7,753
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Provision for Loan Losses	137	108	(371)	(44)
Balance at End of Period	7,726	7,709	7,726	7,709
One-to-four Family Residential
Schedule of changes in allowance for loan losses
Balance at Beginning of Period	1,083	1,052	1,056	1,015
Charge-offs	(15)	0	(15)	0
Recoveries	0	1	0	1
Provision for Loan Losses	53	20	80	57
Balance at End of Period	1,121	1,073	1,121	1,073
Real Estate Construction and Land Development
Schedule of changes in allowance for loan losses
Balance at Beginning of Period	2,056	2,337	2,052	2,156
Charge-offs	0	0	0	0
Recoveries	2	0	2	10
Provision for Loan Losses	2	150	6	321
Balance at End of Period	2,060	2,487	2,060	2,487
Real Estate Construction and Land Development | One-to-four Family Real Estate Construction
Schedule of changes in allowance for loan losses
Balance at Beginning of Period	941	791	862	797
Charge-offs	0	0	0	0
Recoveries	2	0	2	10
Provision for Loan Losses	73	30	152	14
Balance at End of Period	1,016	821	1,016	821
Real Estate Construction and Land Development | Five or More Family Residential and Commercial Properties
Schedule of changes in allowance for loan losses
Balance at Beginning of Period	1,115	1,546	1,190	1,359
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Provision for Loan Losses	(71)	120	(146)	307
Balance at End of Period	1,044	1,666	1,044	1,666
Consumer
Schedule of changes in allowance for loan losses
Balance at Beginning of Period	6,054	5,195	6,081	5,024
Charge-offs	(694)	(398)	(1,179)	(941)
Recoveries	142	110	230	217
Provision for Loan Losses	803	803	1,173	1,410
Balance at End of Period	6,305	5,710	6,305	5,710
Unallocated
Schedule of changes in allowance for loan losses
Balance at Beginning of Period	1,496	1,102	898	506
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Provision for Loan Losses	(170)	(135)	428	461
Balance at End of Period	$ 1,326	$ 967	$ 1,326	$ 967

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Allowance for Loan Losses - Activity in Allowance for Losses Disaggregated on Basis of Impairment (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016
Schedule of allowance for loan losses on the basis of impairment method
Loans Individually Evaluated for Impairment	$ 4,383		$ 3,355
Loans Collectively Evaluated for Impairment	25,968		24,732
PCI Loans	3,621		3,999
Total Allowance for Loan Losses	33,972	$ 33,261	32,086	$ 32,751	$ 31,594	$ 31,083
Commercial Business
Schedule of allowance for loan losses on the basis of impairment method
Loans Individually Evaluated for Impairment	4,214		3,169
Loans Collectively Evaluated for Impairment	16,418		16,034
PCI Loans	2,528		2,796
Total Allowance for Loan Losses	23,160	22,572	21,999	22,514	21,908	22,382
Commercial Business | Commercial and Industrial
Schedule of allowance for loan losses on the basis of impairment method
Loans Individually Evaluated for Impairment	1,706		1,326
Loans Collectively Evaluated for Impairment	7,564		7,558
PCI Loans	918		1,026
Total Allowance for Loan Losses	10,188	9,943	9,910	10,651	10,091	10,968
Commercial Business | Owner-occupied Commercial Real Estate
Schedule of allowance for loan losses on the basis of impairment method
Loans Individually Evaluated for Impairment	1,724		621
Loans Collectively Evaluated for Impairment	2,736		2,557
PCI Loans	786		814
Total Allowance for Loan Losses	5,246	5,040	3,992	4,154	4,216	3,661
Commercial Business | Non-owner Occupied Commercial Real Estate
Schedule of allowance for loan losses on the basis of impairment method
Loans Individually Evaluated for Impairment	784		1,222
Loans Collectively Evaluated for Impairment	6,118		5,919
PCI Loans	824		956
Total Allowance for Loan Losses	7,726	7,589	8,097	7,709	7,601	7,753
One-to-four Family Residential
Schedule of allowance for loan losses on the basis of impairment method
Loans Individually Evaluated for Impairment	90		93
Loans Collectively Evaluated for Impairment	879		798
PCI Loans	152		165
Total Allowance for Loan Losses	1,121	1,083	1,056	1,073	1,052	1,015
Real Estate Construction and Land Development
Schedule of allowance for loan losses on the basis of impairment method
Loans Individually Evaluated for Impairment	5		39
Loans Collectively Evaluated for Impairment	1,744		1,699
PCI Loans	311		314
Total Allowance for Loan Losses	2,060	2,056	2,052	2,487	2,337	2,156
Real Estate Construction and Land Development | One-to-four Family Real Estate Construction
Schedule of allowance for loan losses on the basis of impairment method
Loans Individually Evaluated for Impairment	5		2
Loans Collectively Evaluated for Impairment	787		635
PCI Loans	224		225
Total Allowance for Loan Losses	1,016	941	862	821	791	797
Real Estate Construction and Land Development | Five or More Family Residential and Commercial Properties
Schedule of allowance for loan losses on the basis of impairment method
Loans Individually Evaluated for Impairment	0		37
Loans Collectively Evaluated for Impairment	957		1,064
PCI Loans	87		89
Total Allowance for Loan Losses	1,044	1,115	1,190	1,666	1,546	1,359
Consumer
Schedule of allowance for loan losses on the basis of impairment method
Loans Individually Evaluated for Impairment	74		54
Loans Collectively Evaluated for Impairment	5,601		5,303
PCI Loans	630		724
Total Allowance for Loan Losses	6,305	6,054	6,081	5,710	5,195	5,024
Unallocated
Schedule of allowance for loan losses on the basis of impairment method
Loans Individually Evaluated for Impairment	0		0
Loans Collectively Evaluated for Impairment	1,326		898
PCI Loans	0		0
Total Allowance for Loan Losses	$ 1,326	$ 1,496	$ 898	$ 967	$ 1,102	$ 506

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Allowance for Loan Losses - Recorded Investment Disaggregated on Basis of Impairment (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Schedule of loan receivables on the basis of impairment method
Loans Individually Evaluated for Impairment	$ 42,480	$ 37,459
Loans Collectively Evaluated for Impairment	3,250,343	2,767,650
PCI Loans	31,852	40,603
Total Gross Loans Receivable	3,324,675	2,845,712
Commercial Business
Schedule of loan receivables on the basis of impairment method
Loans Individually Evaluated for Impairment	40,723	34,826
Loans Collectively Evaluated for Impairment	2,616,741	2,191,545
PCI Loans	23,457	27,769
Total Gross Loans Receivable	2,680,921	2,254,140
Commercial Business | Commercial and Industrial
Schedule of loan receivables on the basis of impairment method
Loans Individually Evaluated for Impairment	17,954	11,999
Loans Collectively Evaluated for Impairment	778,270	630,485
PCI Loans	3,819	2,912
Total Gross Loans Receivable	800,043	645,396
Commercial Business | Owner-occupied Commercial Real Estate
Schedule of loan receivables on the basis of impairment method
Loans Individually Evaluated for Impairment	12,184	6,808
Loans Collectively Evaluated for Impairment	672,541	603,827
PCI Loans	8,605	11,515
Total Gross Loans Receivable	693,330	622,150
Commercial Business | Non-owner Occupied Commercial Real Estate
Schedule of loan receivables on the basis of impairment method
Loans Individually Evaluated for Impairment	10,585	16,019
Loans Collectively Evaluated for Impairment	1,165,930	957,233
PCI Loans	11,033	13,342
Total Gross Loans Receivable	1,187,548	986,594
One-to-four Family Residential
Schedule of loan receivables on the basis of impairment method
Loans Individually Evaluated for Impairment	291	299
Loans Collectively Evaluated for Impairment	88,394	81,443
PCI Loans	3,833	5,255
Total Gross Loans Receivable	92,518	86,997
Real Estate Construction and Land Development
Schedule of loan receivables on the basis of impairment method
Loans Individually Evaluated for Impairment	1,084	1,892
Loans Collectively Evaluated for Impairment	163,763	145,468
PCI Loans	402	2,124
Total Gross Loans Receivable	165,249	149,484
Real Estate Construction and Land Development | One-to-four Family Real Estate Construction
Schedule of loan receivables on the basis of impairment method
Loans Individually Evaluated for Impairment	1,084	1,247
Loans Collectively Evaluated for Impairment	70,459	50,649
PCI Loans	391	89
Total Gross Loans Receivable	71,934	51,985
Real Estate Construction and Land Development | Five or More Family Residential and Commercial Properties
Schedule of loan receivables on the basis of impairment method
Loans Individually Evaluated for Impairment	0	645
Loans Collectively Evaluated for Impairment	93,304	94,819
PCI Loans	11	2,035
Total Gross Loans Receivable	93,315	97,499
Consumer
Schedule of loan receivables on the basis of impairment method
Loans Individually Evaluated for Impairment	382	442
Loans Collectively Evaluated for Impairment	381,445	349,194
PCI Loans	4,160	5,455
Total Gross Loans Receivable	$ 385,987	$ 355,091

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Other Real Estate Owned (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Real Estate [Abstract]
Mortgage loans in process of foreclosure	$ 77		$ 77
Changes in other real estate owned
Balance at the beginning of the period	0	$ 786	0	$ 754
Additions	434	0	434	32
Balance at the end of the period	$ 434	$ 786	$ 434	$ 786

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Goodwill and Other Intangible Assets - Change in Goodwill (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Goodwill [Roll Forward]
Balance at the beginning of the period	$ 187,549	$ 119,029	$ 119,029	$ 119,029
Additions as a result of acquisitions	0	0	68,520	0
Balance at the end of the period	$ 187,549	$ 119,029	$ 187,549	$ 119,029

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Goodwill and Other Intangible Assets - Other Intangible Assets, Textual (Details) - Core Deposits	6 Months Ended
	Jun. 30, 2018
Puget Sound Bancorp
Finite-Lived Intangible Assets [Line Items]
Useful life	10 years
Washington Banking Company
Finite-Lived Intangible Assets [Line Items]
Useful life	10 years
Valley Community Bancshares
Finite-Lived Intangible Assets [Line Items]
Useful life	10 years
Northwest Commercial Bank
Finite-Lived Intangible Assets [Line Items]
Useful life	5 years

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Goodwill and Other Intangible Assets - Change in Other Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Finite-lived Intangible Assets [Roll Forward]
Balance at the beginning of the period	$ 16,563	$ 7,050	$ 6,088	$ 7,374
Additions as a result of acquisitions	0	0	11,270	0
Amortization	(796)	(323)	(1,591)	(647)
Balance at the end of the period	$ 15,767	$ 6,727	$ 15,767	$ 6,727

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Junior Subordinated Debentures (Details) - USD ($)	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2007	Dec. 31, 2017	May 01, 2014
Debt Instrument [Line Items]
Issued amount					$ 25,000,000.0
Debt term					30 years
Adjustable rate of trust preferred securities	3.90%		3.90%
Junior subordinated debentures	$ 20,156,000		$ 20,156,000			$ 20,009,000
Junior Subordinated Debentures
Debt Instrument [Line Items]
Weighted average rate	6.28%	5.04%	6.01%	4.96%
LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate					1.56%
Washington Banking
Debt Instrument [Line Items]
Assumed trust preferred securities and junior subordinated debentures, fair value							$ 18,900,000

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Repurchase Agreements (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Dec. 31, 2017
Disclosure of Repurchase Agreements [Abstract]
Repurchase agreements, maturity period	1 day
Financial Instruments Owned and Pledged as Collateral [Line Items]
Repurchase agreement obligations	$ 22,168	$ 31,821
Residential
Financial Instruments Owned and Pledged as Collateral [Line Items]
Repurchase agreement obligations	10,444	11,239
Commercial
Financial Instruments Owned and Pledged as Collateral [Line Items]
Repurchase agreement obligations	$ 11,724	$ 20,582

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Other Borrowings - Textual (Details) - USD ($)	6 Months Ended
	Jun. 30, 2018	Dec. 31, 2017
Federal Home Loan Bank, Advances [Line Items]
Credit facility with the FHLB	$ 838,100,000
FHLB advances outstanding	75,500,000	$ 92,500,000
Maximum federal funds purchases	90,000,000
Federal funds purchased	0	0
Federal Reserve Bank Advances
Federal Home Loan Bank, Advances [Line Items]
Credit facility with the Federal Reserve Bank of San Francisco	58,100,000
Borrowings outstanding	$ 0	$ 0
Minimum
Federal Home Loan Bank, Advances [Line Items]
Unencumbered collateral in amount equal to varying percentages	100.00%
Maximum
Federal Home Loan Bank, Advances [Line Items]
Unencumbered collateral in amount equal to varying percentages	160.00%

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Other Borrowings - Federal Funds Purchased (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Debt Disclosure [Abstract]
Average balance during the period	$ 79,115	$ 107,125	$ 57,544	$ 104,144
Maximum month-end balance during the period	$ 154,500	$ 137,450	$ 154,500	$ 137,450
Weighted average rate during the period	2.04%	0.89%	1.93%	0.86%

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Derivative Financial Instruments (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Prepaid and other assets
Derivative Asset
Estimated Fair Value	$ 6,600	$ 3,400
Accrued expenses and other liabilities
Derivative Liability
Estimated Fair Value	6,600	3,400
Interest rate swaps | Non-hedging interest rate derivatives
Derivative Asset
Notional Amounts	163,257	146,537
Estimated Fair Value	(5,454)	(882)
Derivative Liability
Notional Amounts	163,257	146,537
Estimated Fair Value	$ 5,454	$ 882

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Stockholders' Equity - Reconciliation of Weighted Average Shares (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Net income:
Net income	$ 11,857	$ 11,828	$ 20,944	$ 21,144
Less: Dividends and undistributed earnings allocated to participating securities	(57)	(83)	(110)	(164)
Net income allocated to common shareholders	$ 11,800	$ 11,745	$ 20,834	$ 20,980
Basic:
Weighted average common shares outstanding (in shares)	34,023,566	29,939,280	33,680,014	29,945,641
Less: Restricted stock awards (in shares)	(88,905)	(183,082)	(107,897)	(215,446)
Total basic weighted average common shares outstanding (in shares)	33,934,661	29,756,198	33,572,117	29,730,195
Diluted:
Basic weighted average common shares outstanding (in shares)	33,934,661	29,756,198	33,572,117	29,730,195
Effect of potentially dilutive common shares (in shares)	172,631	83,411	157,819	64,042
Total diluted weighted average common shares outstanding (in shares)	34,107,292	29,839,609	33,729,936	29,794,237

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Stockholders' Equity - Earnings Per Common Share, Textual (Details) - shares	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Equity [Abstract]
Anti-dilutive securities excluded from computation (in shares)	0	0	0	0

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Stockholders' Equity - Dividends (Details) - $ / shares							3 Months Ended		6 Months Ended
	Apr. 25, 2018	Jan. 24, 2018	Oct. 25, 2017	Jul. 25, 2017	Apr. 25, 2017	Jan. 25, 2017	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Dividends Payable [Line Items]
Declared	Apr. 25, 2018	Jan. 24, 2018	Oct. 25, 2017	Jul. 25, 2017	Apr. 25, 2017	Jan. 25, 2017
Cash Dividend per Share (in usd per share)	$ 0.15	$ 0.15	$ 0.13	$ 0.13	$ 0.13	$ 0.12	$ 0.15	$ 0.13	$ 0.3	$ 0.25
Record Date	May 10, 2018	Feb. 07, 2018	Nov. 08, 2017	Aug. 10, 2017	May 10, 2017	Feb. 09, 2017
Paid Date	May 24, 2018	Feb. 21, 2018	Nov. 22, 2017	Aug. 24, 2017	May 24, 2017	Feb. 23, 2017
Special Dividend
Dividends Payable [Line Items]
Declared			Oct. 25, 2017
Cash Dividend per Share (in usd per share)			$ 0.10
Record Date			Nov. 08, 2017
Paid Date			Nov. 22, 2017

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Stockholders' Equity - Stock Repurchase Program (Details) - Eleventh Plan - $ / shares		3 Months Ended		6 Months Ended		41 Months Ended
	Oct. 23, 2014	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Mar. 31, 2018
Stockholders Equity (Textual) [Abstract]
Outstanding share percent	5.00%
Outstanding common shares in the plan (in shares)	1,513,000
Number of shares repurchased (in shares)		0	0	0	0	579,996
Withholding taxes average price per share (in usd per share)		$ 16.67

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Stockholders' Equity - Shares Repurchased (Details) - $ / shares	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Jan. 16, 2018
Equity, Class of Treasury Stock [Line Items]
Number of shares repurchased related to withholding taxes due on accelerated vesting of RSUs (in shares)	26,741		26,741
Average share price (in usd per share)	$ 31.80		$ 31.80		$ 31.80
Shares Related to Withholding Taxes on the Vesting of Restricted Stock
Equity, Class of Treasury Stock [Line Items]
Repurchased shares to pay withholding taxes (in shares)	7,394	11,476	52,820	27,367
Stock repurchase to pay withholding taxes average share price (in usd per share)	$ 33.84	$ 25.50	$ 31.96	$ 24.60

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Stockholders' Equity - Issuance of Common Stock (Details) - $ / shares	Jun. 30, 2018	Jan. 16, 2018
Business Acquisition [Line Items]
Share price (in usd per share)	$ 31.80	$ 31.80
Puget Sound
Business Acquisition [Line Items]
Number of shares issued (in shares)		4,112,258

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Accumulated Other Comprehensive (Loss) Income (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017	Dec. 31, 2016
Increase (Decrease) in Accumulated Other Comprehensive (Loss) Income [Roll Forward]
Beginning balance			$ 508,305	$ 481,763
Other comprehensive (loss) income	$ (2,372)	$ 2,690	(9,915)	4,163
ASU 2016-01 implementation						$ 0
Ending balance	639,523	500,048	639,523	500,048
Accumulated other comprehensive income (loss), net
Increase (Decrease) in Accumulated Other Comprehensive (Loss) Income [Roll Forward]
Beginning balance	(8,934)	(1,133)	(1,298)	(2,606)
Other comprehensive (loss) income before reclassification	(2,358)	2,766	(9,874)	4,239
Amounts reclassified from AOCI for gain on sale of investment securities available for sale included in net income	(14)	(76)	(41)	(76)
Other comprehensive (loss) income	(2,372)	2,690	(9,915)	4,163
ASU 2016-01 implementation					$ 0	$ (93)	$ 0	$ 0
Ending balance	$ (11,306)	$ 1,557	$ (11,306)	$ 1,557

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Fair Value Measurements - Fair Value Measurement on Recurring Basis (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total investment securities available for sale	$ 873,670	$ 810,530
U.S. Treasury and U.S. Government-sponsored agencies
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total investment securities available for sale	52,064	13,442
Municipal securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total investment securities available for sale	203,022	250,015
Residential
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total investment securities available for sale	312,122	280,211
Commercial
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total investment securities available for sale	250,221	217,079
Collateralized loan obligations
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total investment securities available for sale	2,256	4,580
Corporate obligations
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total investment securities available for sale	25,690	16,770
Other asset-backed securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total investment securities available for sale	28,295	28,433
Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total investment securities available for sale	873,670	810,530
Derivative assets - interest rate swaps	6,629	3,418
Derivative liabilities - interest rate swaps	6,629	3,418
Recurring | U.S. Treasury and U.S. Government-sponsored agencies
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total investment securities available for sale	52,064	13,442
Recurring | Municipal securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total investment securities available for sale	203,022	250,015
Recurring | Residential
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total investment securities available for sale	312,122	280,211
Recurring | Commercial
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total investment securities available for sale	250,221	217,079
Recurring | Collateralized loan obligations
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total investment securities available for sale	2,256	4,580
Recurring | Corporate obligations
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total investment securities available for sale	25,690	16,770
Recurring | Other asset-backed securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total investment securities available for sale	28,295	28,433
Recurring | Level 1
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total investment securities available for sale	0	146
Derivative assets - interest rate swaps	0	0
Derivative liabilities - interest rate swaps	0	0
Recurring | Level 1 | U.S. Treasury and U.S. Government-sponsored agencies
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total investment securities available for sale	0	0
Recurring | Level 1 | Municipal securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total investment securities available for sale	0	0
Recurring | Level 1 | Residential
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total investment securities available for sale	0	0
Recurring | Level 1 | Commercial
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total investment securities available for sale	0	0
Recurring | Level 1 | Collateralized loan obligations
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total investment securities available for sale	0	0
Recurring | Level 1 | Corporate obligations
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total investment securities available for sale	0	0
Recurring | Level 1 | Other asset-backed securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total investment securities available for sale	0	146
Recurring | Level 2
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total investment securities available for sale	873,670	810,384
Derivative assets - interest rate swaps	6,629	3,418
Derivative liabilities - interest rate swaps	6,629	3,418
Recurring | Level 2 | U.S. Treasury and U.S. Government-sponsored agencies
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total investment securities available for sale	52,064	13,442
Recurring | Level 2 | Municipal securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total investment securities available for sale	203,022	250,015
Recurring | Level 2 | Residential
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total investment securities available for sale	312,122	280,211
Recurring | Level 2 | Commercial
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total investment securities available for sale	250,221	217,079
Recurring | Level 2 | Collateralized loan obligations
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total investment securities available for sale	2,256	4,580
Recurring | Level 2 | Corporate obligations
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total investment securities available for sale	25,690	16,770
Recurring | Level 2 | Other asset-backed securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total investment securities available for sale	28,295	28,287
Recurring | Level 3
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total investment securities available for sale	0	0
Derivative assets - interest rate swaps	0	0
Derivative liabilities - interest rate swaps	0	0
Recurring | Level 3 | U.S. Treasury and U.S. Government-sponsored agencies
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total investment securities available for sale	0	0
Recurring | Level 3 | Municipal securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total investment securities available for sale	0	0
Recurring | Level 3 | Residential
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total investment securities available for sale	0	0
Recurring | Level 3 | Commercial
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total investment securities available for sale	0	0
Recurring | Level 3 | Collateralized loan obligations
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total investment securities available for sale	0	0
Recurring | Level 3 | Corporate obligations
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total investment securities available for sale	0	0
Recurring | Level 3 | Other asset-backed securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Total investment securities available for sale	$ 0	$ 0

XML

Fair Value Measurements - Textual (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Fair Value Disclosures [Abstract]
Fair value assets transfers between level 1 and level 2 transfer amount	$ 0	$ 0	$ 0	$ 0

XML

Fair Value Measurements - Fair Value Measurement on Nonrecurring Basis (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Level 1
Fair value measurements of assets on a nonrecurring basis
Fair Value	$ 0		$ 0		$ 0
Level 2
Fair value measurements of assets on a nonrecurring basis
Fair Value	0		0		0
Level 3
Fair value measurements of assets on a nonrecurring basis
Fair Value	3,277,881		3,277,881		2,810,401
Nonrecurring | Impaired Loans
Fair value measurements of assets on a nonrecurring basis
Basis	976		976		976
Fair Value	304		304		307
Net Losses (Gains) Recorded in Earnings	3	$ 0	3	$ 0
Nonrecurring | Impaired Loans | Level 1
Fair value measurements of assets on a nonrecurring basis
Fair Value	0		0		0
Nonrecurring | Impaired Loans | Level 2
Fair value measurements of assets on a nonrecurring basis
Fair Value	0		0		0
Nonrecurring | Impaired Loans | Level 3
Fair value measurements of assets on a nonrecurring basis
Fair Value	304		304		307
Nonrecurring | Impaired Loans | Real Estate Construction and Land Development | One-to-four Family Real Estate Construction
Fair value measurements of assets on a nonrecurring basis
Basis	976		976		976
Fair Value	304		304		307
Net Losses (Gains) Recorded in Earnings	3	$ 0	3	$ 0
Nonrecurring | Impaired Loans | Real Estate Construction and Land Development | One-to-four Family Real Estate Construction | Level 1
Fair value measurements of assets on a nonrecurring basis
Fair Value	0		0		0
Nonrecurring | Impaired Loans | Real Estate Construction and Land Development | One-to-four Family Real Estate Construction | Level 2
Fair value measurements of assets on a nonrecurring basis
Fair Value	0		0		0
Nonrecurring | Impaired Loans | Real Estate Construction and Land Development | One-to-four Family Real Estate Construction | Level 3
Fair value measurements of assets on a nonrecurring basis
Fair Value	$ 304		$ 304		$ 307

XML

Fair Value Measurements - Quantitative Information, Level 3 (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2018	Dec. 31, 2017
Nonrecurring | Impaired Loans
Fair value measurements for financial instruments measured at fair value on a non-recurring basis
Impaired loans	$ 304	$ 307
Level 3
Fair value measurements for financial instruments measured at fair value on a non-recurring basis
Impaired loans	3,277,881	2,810,401
Level 3 | Nonrecurring | Impaired Loans
Fair value measurements for financial instruments measured at fair value on a non-recurring basis
Impaired loans	$ 304	$ 307
Valuation Technique(s)	Market approach	Market approach
Unobservable Input(s)	Adjustment for differences between the comparable sales	Adjustment for differences between the comparable sales
Level 3 | Nonrecurring | Impaired Loans | Minimum
Fair value measurements for financial instruments measured at fair value on a non-recurring basis
Range of Inputs; Weighted Average	(91.20%)	(91.50%)
Level 3 | Nonrecurring | Impaired Loans | Maximum
Fair value measurements for financial instruments measured at fair value on a non-recurring basis
Range of Inputs; Weighted Average	(14.40%)	(14.40%)
Level 3 | Nonrecurring | Impaired Loans | Weighted Average
Fair value measurements for financial instruments measured at fair value on a non-recurring basis
Range of Inputs; Weighted Average	(44.00%)	(44.00%)

XML

Fair Value Measurements - Carrying Value and Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Financial Assets:
Equity security	$ 162	$ 146
Level 1
Financial Assets:
Cash and cash equivalents	129,943	103,015
Investment securities available for sale	0	146
Loans held for sale	0	0
Total loans receivable, net	0	0
Accrued interest receivable	28	23
Derivative assets - interest rate swaps	0	0
Equity security	162
Financial Liabilities:
Noninterest deposits, interest bearing demand deposits, money market accounts and savings accounts	3,508,300	2,994,662
Certificate of deposit accounts	0	0
Federal Home Loan Bank advances	0	0
Securities sold under agreement to repurchase	22,168	31,821
Junior subordinated debentures	0	0
Accrued interest payable	46	45
Derivative liabilities - interest rate swaps	0	0
Level 2
Financial Assets:
Cash and cash equivalents	0	0
Investment securities available for sale	873,670	810,384
Loans held for sale	3,708	2,364
Total loans receivable, net	0	0
Accrued interest receivable	3,826	3,772
Derivative assets - interest rate swaps	6,629	3,418
Equity security	0
Financial Liabilities:
Noninterest deposits, interest bearing demand deposits, money market accounts and savings accounts	0	0
Certificate of deposit accounts	463,971	397,039
Federal Home Loan Bank advances	75,500	92,500
Securities sold under agreement to repurchase	0	0
Junior subordinated debentures	0	0
Accrued interest payable	107	79
Derivative liabilities - interest rate swaps	6,629	3,418
Level 3
Financial Assets:
Cash and cash equivalents	0	0
Investment securities available for sale	0	0
Loans held for sale	0	0
Total loans receivable, net	3,277,881	2,810,401
Accrued interest receivable	9,628	8,449
Derivative assets - interest rate swaps	0	0
Equity security	0
Financial Liabilities:
Noninterest deposits, interest bearing demand deposits, money market accounts and savings accounts	0	0
Certificate of deposit accounts	0	0
Federal Home Loan Bank advances	0	0
Securities sold under agreement to repurchase	0	0
Junior subordinated debentures	20,000	18,500
Accrued interest payable	45	38
Derivative liabilities - interest rate swaps	0	0
Carrying Value
Financial Assets:
Cash and cash equivalents	129,943	103,015
Investment securities available for sale	873,670	810,530
Federal Home Loan Bank stock	8,616	8,347
Loans held for sale	3,598	2,288
Total loans receivable, net	3,294,316	2,816,985
Accrued interest receivable	13,482	12,244
Derivative assets - interest rate swaps	6,629	3,418
Equity security	162
Financial Liabilities:
Noninterest deposits, interest bearing demand deposits, money market accounts and savings accounts	3,508,300	2,994,662
Certificate of deposit accounts	460,635	398,398
Federal Home Loan Bank advances	75,500	92,500
Securities sold under agreement to repurchase	22,168	31,821
Junior subordinated debentures	20,156	20,009
Accrued interest payable	198	162
Derivative liabilities - interest rate swaps	6,629	3,418
Fair Value
Financial Assets:
Cash and cash equivalents	129,943	103,015
Investment securities available for sale	873,670	810,530
Loans held for sale	3,708	2,364
Total loans receivable, net	3,277,881	2,810,401
Accrued interest receivable	13,482	12,244
Derivative assets - interest rate swaps	6,629	3,418
Equity security	162
Financial Liabilities:
Noninterest deposits, interest bearing demand deposits, money market accounts and savings accounts	3,508,300	2,994,662
Certificate of deposit accounts	463,971	397,039
Federal Home Loan Bank advances	75,500	92,500
Securities sold under agreement to repurchase	22,168	31,821
Junior subordinated debentures	20,000	18,500
Accrued interest payable	198	162
Derivative liabilities - interest rate swaps	$ 6,629	$ 3,418

XML

Stock-Based Compensation - Textual (Details) - shares	Jul. 24, 2014	Jun. 30, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares remain available for future issuances under stock-based compensation plans		964,832
the Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized for issuance	1,500,000

XML

Stock-Based Compensation - Stock Option Awards, Textual (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Proceeds from exercise of stock options			$ 47,000	$ 109,000
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense	$ 0	$ 0	0	0
Intrinsic value of options exercised			82,000	98,000
Proceeds from exercise of stock options			$ 47,000	$ 109,000
Stock Options | Award 1
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period			3 years
Expiration period			5 years
Stock Options | Award 2
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period			4 years
Expiration period			10 years

XML

Stock-Based Compensation - Stock Option Activity (Details) - USD ($) $ / shares in Units, $ in Thousands	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Shares
Outstanding at beginning of period (in shares)	23,231	37,495
Exercised (in shares)	(4,042)	(8,372)
Forfeited or expired (in shares)	(831)	(1,308)
Outstanding at end of period (in shares)	18,358	27,815
Shares, Vested and expected to vest (in shares)	18,358	27,815
Shares, Exercisable (in shares)	18,358	27,815
Weighted-Average Exercise Price
Outstanding at beginning of period (in usd per share)	$ 14.21	$ 13.77
Exercised (in usd per share)	11.55	13.03
Forfeited or expired (in usd per share)	14.77	13.53
Outstanding at end of period (in usd per share)	14.77	14.00
Weighted-Average Exercise Price, Vested and expected to vest (in usd per share)	14.77	14.00
Weighted-Average Exercise Price, Exercisable (in usd per share)	$ 14.77	$ 14.00
Weighted-Average Remaining Contractual Term, Outstanding	1 year 10 months 25 days	2 years 7 months 17 days
Weighted-Average Remaining Contractual Term, Vested and expected to vest	1 year 10 months 25 days	2 years 7 months 17 days
Weighted-Average Remaining Contractual Term, Exercisable	1 year 10 months 25 days	2 years 7 months 17 days
Aggregate Intrinsic Value, Outstanding	$ 369	$ 348
Aggregate Intrinsic Value, Vested and expected to vest	369	348
Aggregate Intrinsic Value, Exercisable	$ 369	$ 348

XML

Stock-Based Compensation - Restricted Stock, Textual (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting date fair value	$ 2,100,000			$ 2,600,000
Restricted Stock Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense	249,000	$ 359,000	$ 532,000	804,000
Tax benefit from compensation expense	52,000	126,000	112,000	282,000
Unrecognized compensation expense	$ 949,000		$ 949,000
Compensation expense expected to be recognized, weighted average period	1 year 4 months 17 days
Restricted Stock Awards | Award 1
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	4 years
Restricted Stock Awards | Award 2
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	4 years
Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period			3 years
Compensation expense	$ 435,000	171,000	$ 775,000	236,000
Tax benefit from compensation expense	91,000	$ 60,000	163,000	83,000
Unrecognized compensation expense	$ 4,100,000		$ 4,100,000
Compensation expense expected to be recognized, weighted average period			2 years 7 months 24 days
Vesting date fair value			$ 1,000,000	$ 0
Performance-Based Restricted Stock Units (PRSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period			3 years
Performance-Based Restricted Stock Units (PRSUs) | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Actual payout percentage			0.00%
Performance-Based Restricted Stock Units (PRSUs) | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Actual payout percentage			150.00%

XML

Stock-Based Compensation - Restricted Stock Activity (Details) - $ / shares	3 Months Ended	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Restricted Stock Awards
Shares
Nonvested at beginning of period (in shares)		137,399	261,296
Vested (in shares)		(66,193)	(105,972)
Forfeited (in shares)		(2,394)	(7,704)
Nonvested at end of period (in shares)	147,620	68,812	147,620
Weighted-Average Grant Date Fair Value
Nonvested at beginning of period (in usd per share)		$ 17.00	$ 16.80
Vested (in usd per share)		16.67	16.47
Forfeited (in usd per share)		16.86	16.78
Nonvested at end of period (in usd per share)	$ 17.04	$ 17.32	$ 17.04
Restricted Stock Units
Shares
Nonvested at beginning of period (in shares)		90,544	0
Granted (in shares)		114,015	92,019
Vested (in shares)		(32,262)
Forfeited (in shares)	(909)	(3,644)
Nonvested at end of period (in shares)	91,110	168,653	91,110
Weighted-Average Grant Date Fair Value
Nonvested at beginning of period (in usd per share)		$ 25.31	$ 0.00
Granted (in usd per share)		30.61	25.29
Vested (in usd per share)		25.42
Forfeited (in usd per share)	$ 25.35	27.87
Nonvested at end of period (in usd per share)	$ 25.29	$ 28.51	$ 25.29

XML

Stock-Based Compensation - Fair Value Assumptions (Details) - Performance-Based Restricted Stock Units (PRSUs) - $ / shares	1 Months Ended
	Feb. 28, 2018	Feb. 28, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares issued	5,550	6,089
Expected Term in Years	2 years 10 months 2 days	2 years 10 months 6 days
Expected Dividend Yield (as a percent)	0.00%	0.00%
Weighted-Average Fair Value (in usd per share)	$ 27.69	$ 24.39
Correlation coefficient (as a percent)	76.44%	75.93%
Heritage volatility (as a percent)	22.30%	21.80%
Peer Company
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Range of peer company volatilities, Minimum (as a percent)	18.99%	17.80%
Range of peer company volatilities, Maximum (as a percent)	51.42%	63.10%
Minimum | Peer Company
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Correlation coefficient (as a percent)	28.16%	8.24%
Maximum | Peer Company
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Correlation coefficient (as a percent)	94.29%	89.79%
Weighted Average
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted-Average Risk Free Interest Rate	2.39%	1.40%

XML

Cash Requirement (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Banking and Thrift [Abstract]
Required reserve balance	$ 10,900	$ 60

XML

Subsequent Event (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended	6 Months Ended
	Jun. 29, 2018	Jun. 30, 2018	Jun. 30, 2018	Jul. 02, 2018	Jan. 16, 2018	Dec. 31, 2017
Subsequent Event [Line Items]
Share price (in usd per share)		$ 31.80	$ 31.80		$ 31.80
Assets		$ 4,789,488	$ 4,789,488			$ 4,113,270
Loans		3,294,316	3,294,316			2,816,985
Deposits		3,968,935	3,968,935			$ 3,393,060
Premier Commercial
Subsequent Event [Line Items]
Share price (in usd per share)	$ 34.85
Number of shares issued	2,848,579
Share price paid in cash (in usd per share)	$ 2,000
Total consideration paid	$ 99,300
Assets		381,700	381,700
Loans		335,300	335,300
Deposits		319,300	319,300
Acquisition-related costs		$ 329	$ 653
Premier Commercial | Subsequent Event
Subsequent Event [Line Items]
Number of shares issued (in shares)				0.4863