10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Form 10-Q

(Mark One)
þ	QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
	For the quarterly period ended June 30, 2015
	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 001-36688

Great Western Bancorp, Inc.

(Exact name of registrant as specified in its charter)

Delaware	47-1308512
(State or other jurisdiction of incorporation or organization)	(IRS Employer Identification Number)
100 North Phillips Avenue Sioux Falls, South Dakota	57104
(Address of principal executive offices)	(Zip Code)

(605) 334-2548

Registrant’s telephone number, including area code

Securities registered pursuant to Section 12(b) of the Act:

Title of Each Class	Name of Each Exchange on Which Registered
Common Stock, $0.01 par value per share	New York Stock Exchange

Securities registered pursuant to Section 12(g) of the Act:

None

Indicate by check mark whether the registrant: (1) has filed all reports required to be filed by Section 13 or 15(d) of the Exchange Act 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 x    No   o

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 during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).   Yes x    No   o

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

Large accelerated filer  o Accelerated filer   o Non-accelerated filer x  
(Do not check if a smaller company) Smaller reporting company   o

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

As of August 10, 2015, the number of shares of the registrant’s Common Stock outstanding was 55,219,596.

GREAT WESTERN BANCORP, INC.

QUARTERLY REPORT ON FORM 10-Q

TABLE OF CONTENTS

EXPLANATORY NOTE
CAUTIONARY NOTE REGARDING FORWARD-LOOKING STATEMENTS
PART I. FINANCIAL INFORMATION	6
Item 1. Financial Statements (Unaudited)	6
Item 2. Management's Discussion and Analysis of Financial Condition and Results of Operations	44
Item 3. Quantitative and Qualitative Disclosures About Market Risk	85
Item 4. Controls and Procedures	86
PART II. OTHER INFORMATION	87
Item 1. Legal Proceedings	87
Item 1A. Risk Factors	87
Item 2. Unregistered Sales of Equity Securities and Use of Proceeds	87
Item 3. Defaults Upon Senior Securities	87
Item 4. Mine Safety Disclosures	87
Item 5. Other Information	87
Item 6. Index to Exhibits	88
SIGNATURES	90
EX-2.1
EX-2.2
EX-3.1
EX-3.2
EX-4.1
EX-4.2
EX-4.3
EX-4.4
EX-4.5
EX-10.1
EX-10.2
EX-10.3
EX-10.4
EX-10.5
EX-10.6
EX-10.7
EX-10.8
EX-10.9
EX-10.10
EX-10.11
EX-11.1
EX-31.1
EX-31.2
EX-32.1
EX-32.2

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EXPLANATORY NOTE

Except as otherwise stated or the context otherwise requires, references in this Quarterly Report on Form 10-Q to:

• “we,” “our,” “us” and our “company” refer to:

◦ Great Western Bancorporation, Inc., an Iowa corporation, and its consolidated subsidiaries, for all periods prior to the Formation Transactions; and

◦ Great Western Bancorp, Inc., a Delaware corporation, and its consolidated subsidiaries, for all periods after the completion of the Formation Transactions;

• “Great Western” refers to Great Western Bancorporation, Inc. but not its consolidated subsidiaries, for all periods prior to the Formation Transaction, and Great Western Bancorp, Inc. but not its consolidated subsidiaries, for all periods after the completion of the Formation Transaction;

• our “bank” refers to Great Western Bank, a South Dakota banking corporation;

• “NAB” refers to National Australia Bank Limited, an Australian public company that was our ultimate parent company prior to our initial public offering in October 2014 and, until July 31,2015, was our principal stockholder;

• our “states” refers to the seven states (South Dakota, Iowa, Nebraska, Colorado, Arizona, Kansas and Missouri) in which we currently conduct our business;

• our “footprint” refers to the geographic markets within our states in which we currently conduct our business; and

• the “Formation Transactions” means a series of transactions completed on October 17, 2014 and undertaken in preparation for our initial public offering comprised of:

◦ the cash contribution by National Americas Holdings LLC to Great Western Bancorp, Inc. in an amount equal to the total stockholder’s equity of Great Western Bancorporation, Inc.;

◦ the sale by National Americas Investment, Inc. of all outstanding capital stock of Great Western Bancorporation, Inc. to Great Western Bancorp, Inc. for an amount in cash equal to the total stockholder’s equity of Great Western Bancorporation, Inc.; and

◦ the merger of Great Western Bancorporation, Inc. with and into Great Western Bancorp, Inc., with Great Western Bancorp, Inc. continuing as the surviving corporation and succeeding to all the assets, liabilities and business of Great Western Bancorporation, Inc.

CAUTIONARY NOTE REGARDING FORWARD-LOOKING STATEMENTS

This Quarterly Report on Form 10-Q contains forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, or the Securities Act, and Section 21E of the Securities Exchange Act of 1934, as amended, or the Exchange Act. These forward-looking statements reflect our current views with respect to, among other things, future events and our financial performance. These statements are often, but not always, made through the use of words or phrases such as “may,” “might,” “should,” “could,” “predict,” “potential,” “believe,” “expect,” “continue,” “will,” “anticipate,” “seek,” “estimate,” “intend,” “plan,” “projection,” “would,” “annualized” and “outlook,” or the negative version of those words or other comparable words or phrases of a future or forward-looking nature. These forward-looking statements are not historical facts, and are based on current expectations, estimates and projections about our industry, management’s beliefs and certain assumptions made by management, many of which, by their nature, are inherently uncertain and beyond our control. Accordingly, we caution you that any such forward-looking statements are not guarantees of future performance and are subject to risks, assumptions, estimates and uncertainties that are difficult to predict. Although we believe that the expectations reflected in these forward-looking statements are reasonable as of the date made, actual results may prove to be materially different from the results expressed or implied by the forward-looking statements.

- 3-

A number of important factors could cause our actual results to differ materially from those indicated in these forward-looking statements, including those factors identified in “Item 1A. Risk Factors” or “Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations” or the following:

• current and future economic and market conditions in the United States generally or in our states in particular, including the rate of growth and employment levels;

• the effect of the current low interest rate environment or changes in market interest rates;

• the geographic concentration of our operations, and our concentration on originating business and agribusiness loans;

• the relative strength or weakness of the agricultural and commercial credit sectors and of the real estate markets in the markets in which our borrowers are located;

• declines in the market prices for agricultural products;

• our ability to effectively execute our strategic plan and manage our growth;

• our ability to successfully manage our credit risk and the sufficiency of our allowance for loan loss;

• our ability to attract and retain skilled employees or changes in our management personnel;

• our ability to effectively compete with other financial services companies and the effects of competition in the financial services industry on our business;

• changes in the demand for our products and services;

• the effectiveness of our risk management and internal disclosure controls and procedures;

• fluctuations in the values of our assets and liabilities and off-balance sheet exposures;

• our ability to attract and retain customer deposits;

• our access to sources of liquidity and capital to address our liquidity needs;

• possible changes in trade, monetary and fiscal policies of, and other activities undertaken by, governments, agencies, central banks and similar organizations;

• our ability to identify and address cyber-security risks;

• any failure or interruption of our information and communications systems;

• our ability to keep pace with technological changes;

• our ability to successfully develop and commercialize new or enhanced products and services;

• possible impairment of our goodwill and other intangible assets, or any adjustment of the valuation of our deferred tax assets;

• the effects of problems encountered by other financial institutions;

• the effects of geopolitical instability, including war, terrorist attacks, and man-made and natural disasters;

• the effects of the failure of any component of our business infrastructure provided by a third party;

• the impact of, and changes in applicable laws, regulations and accounting standards and policies;

- 4-

• market perceptions associated with our separation from NAB and other aspects of our business;

• our likelihood of success in, and the impact of, litigation or regulatory actions;

• our inability to receive dividends from our bank and to service debt, pay dividends to our common stockholders and satisfy obligations as they become due;

• the incremental costs of operating as a standalone public company;

• our ability to meet our obligations as a public company, including our obligations under Section 404 of the Sarbanes-Oxley Act of 2002;

• our ability to retain service providers to perform oversight or control functions or services that have otherwise been performed in the past by NAB; and

• damage to our reputation from any of the factors described above, in “Item 1A. Risk Factors” or in “Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations.”

The foregoing factors should not be considered an exhaustive list and should be read together with the other cautionary statements included in this Quarterly Report on Form 10-Q, our Annual Report on Form 10-K for the fiscal year ended September 30, 2014 and our Quarterly Reports on Form 10-Q for the periods ended March 31, 2015 and December 31, 2014. If one or more events related to these or other risks or uncertainties materialize, or if our underlying assumptions prove to be incorrect, actual results may differ materially from what we anticipate. Accordingly, you should not place undue reliance on any such forward-looking statements. Any forward-looking statement speaks only as of the date on which it is made, and we do not undertake any obligation to update or review any forward-looking statement, whether as a result of new information, future developments or otherwise.

- 5-

PART I. FINANCIAL INFORMATION

ITEM 1. FINANCIAL STATEMENTS (UNAUDITED)

- 6-

GREAT WESTERN BANCORP, INC.

Consolidated Balance Sheets (Unaudited)

(In Thousands, Except Share and Per Share Data)

	June 30,			September 30,
	2015			2014
Assets
Cash and due from banks	$	187,171		$	256,639
Securities available for sale	1,410,475			1,341,242
Investment in affiliates	1,683			1,683
Loans, net of allowance for loan losses of $55,930 and $47,518 at June 30, 2015 and September 30, 2014, respectively (includes $102,203 and $234,036 of loans covered by FDIC loss share agreements at June 30, 2015 and September 30, 2014, respectively, $1,063,665 and $985,411 of loans and written loan commitments carried at fair value under the fair value option at June 30, 2015 and September 30, 2014, respectively, and $9,173 and $10,381 of loans held for sale at June 30, 2015 and September 30, 2014, respectively)	7,189,309			6,739,949
Premises and equipment	98,235			103,707
Accrued interest receivable	39,528			42,609
Other repossessed property (includes $205 and $10,628 of property covered under FDIC loss share agreements at June 30, 2015 and September 30, 2014, respectively)	21,969			49,580
FDIC indemnification asset	16,979			26,678
Goodwill	697,807			697,807
Core deposits and other intangibles	7,827			14,229
Net deferred tax assets	38,884			44,703
Other assets	54,292			52,603
Total assets	$	9,764,159		$	9,371,429
Liabilities and stockholders' equity
Deposits:
Noninterest-bearing	$	1,360,722		$	1,303,015
Interest-bearing	5,996,966			5,749,165
Total deposits	7,357,688			7,052,180
Securities sold under agreements to repurchase	161,559			161,687
FHLB advances and other borrowings	590,520			575,094
Related party notes payable	41,295			41,295
Subordinated debentures	56,083			56,083
Fair value of derivatives	24,426			13,092
Accrued interest payable	4,211			5,273
Income tax payable	—			4,915
Accrued expenses and other liabilities	40,526			40,720
Total liabilities	8,276,308			7,950,339
Stockholders' equity
Common stock, $0.01 par value, authorized 500,000,000 shares; issued and outstanding at June 30, 2015 and September 30, 2014 - 57,886,114 shares	579			579
Additional paid-in capital	1,261,102			1,260,124
Retained earnings	227,904			166,544
Accumulated other comprehensive loss	(1,734		)	(6,157		)
Total stockholders' equity	1,487,851			1,421,090
Total liabilities and stockholders' equity	$	9,764,159		$	9,371,429

See accompanying notes.

- 7-

GREAT WESTERN BANCORP, INC.

Consolidated Statements of Comprehensive Income (Unaudited)

(In Thousands, Except Share and Per Share Data)

	Three Months Ended June 30,						Nine Months Ended June 30,
	2015			2014			2015			2014
Interest and dividend income
Loans	$	85,240		$	80,797		$	251,978		$	240,133
Taxable securities	5,984			6,598			17,050			20,190
Nontaxable securities	10			33			36			61
Dividends on securities	489			351			997			751
Federal funds sold and other	155			99			599			400
Total interest and dividend income	91,878			87,878			270,660			261,535
Interest expense
Deposits	5,776			6,319			17,775			19,629
Securities sold under agreements to repurchase	134			153			430			442
FHLB advances and other borrowings	867			751			2,706			2,591
Related party notes payable	233			230			692			690
Subordinated debentures and other	330			325			985			985
Total interest expense	7,340			7,778			22,588			24,337
Net interest income	84,538			80,100			248,072			237,198
Provision (recovery) for loan losses	4,410			1,500			17,408			(2,065		)
Net interest income after provision for loan losses	80,128			78,600			230,664			239,263
Noninterest income
Service charges and other fees	9,627			9,695			28,896			29,728
Net gain on sale of loans	1,903			1,322			5,027			3,885
Casualty insurance commissions	333			320			882			877
Investment center income	742			578			1,969			1,757
Net gain on sale of securities	—			—			51			6
Trust department income	897			942			2,903			2,847
Net increase (decrease) in fair value of loans at fair value	(24,394		)	13,886			7,914			13,506
Net realized and unrealized gain (loss) on derivatives	18,946			(17,797		)	(27,357		)	(25,396		)
Other	1,951			1,368			4,556			4,070
Total noninterest income	10,005			10,314			24,841			31,280
Noninterest expense
Salaries and employee benefits	26,612			24,126			75,373			71,176
Occupancy expenses, net	3,161			4,894			11,169			13,613
Data processing	4,657			4,354			14,193			14,105
Equipment expenses	1,075			1,077			2,956			3,099
Advertising	1,196			1,213			2,870			3,385
Communication expenses	1,031			1,046			3,429			3,402
Professional fees	3,289			3,620			10,464			9,623
Net (gain) from sale of repossessed property and other assets	(1,452		)	(1,564		)	(1,836		)	(2,413		)
Amortization of core deposits and other intangibles	1,776			4,069			6,402			13,448
Other	5,085			11,443			16,939			22,466
Total noninterest expense	46,430			54,278			141,959			151,904
Income before income taxes	43,703			34,636			113,546			118,639
Provision for income taxes	14,871			12,134			38,293			41,562
Net income	$	28,832		$	22,502		$	75,253		$	77,077
Other comprehensive income (loss) - change in net unrealized gain (loss) on securities available-for-sale (net of deferred income tax (expense) benefit of $2,254 and $(2,946) for the three months ended June 30, 2015 and 2014, respectively and $(2,712) and ($2,684) for the nine months ended June 30, 2015 and 2014, respectively)	(3,845		)	4,806			4,423			4,673
Comprehensive income	$	24,987		$	27,308		$	79,676		$	81,750
Earnings per common share
Weighted average shares outstanding	57,898,335			57,886,114			57,897,484			57,886,114
Earnings per share	$	0.50		$	0.39		$	1.30		$	1.33
Diluted earnings per common share
Weighted average shares outstanding	57,959,202			57,886,114			57,929,188			57,886,114
Diluted earnings per share	$	0.50		$	0.39		$	1.30		$	1.33
Dividends per share
Dividends issued	$	6,946		$	34,000		$	13,893		$	68,000
Dividends per share	$	0.12		$	0.59		$	0.24		$	1.17

See accompanying notes.

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GREAT WESTERN BANCORP, INC.

Consolidated Statement of Stockholders' Equity (Unaudited)

(In Thousands, Except Share and Per Share Data)

	Comprehensive Income		Common Stock Par Value		Additional Paid-in Capital		Retained Earnings			Accumulated Other Comprehensive Loss			Total
Balance, September 30, 2013			$	579	$	1,260,124	$	163,592		$	(7,081	)	$	1,417,214
Net income	$	77,077	—		—		77,077			—			77,077
Other comprehensive income, net of tax:
Net change in net unrealized gain on securities available for sale	$	4,673	—		—		—			4,673			4,673
Comprehensive income	$	81,750
Stock-based compensation			—		—		—			—			—
Cash dividends declared:
Common stock, $1.17 per share			—		—		(68,000		)	—			(68,000		)
Balance, June 30, 2014			$	579	$	1,260,124	$	172,669		$	(2,408	)	$	1,430,964
Balance, September 30, 2014			$	579	$	1,260,124	$	166,544		$	(6,157	)	$	1,421,090
Net income	$	75,253	—		—		75,253			—			75,253
Other comprehensive income, net of tax:
Net change in net unrealized gain on securities available for sale	$	4,423	—		—		—			4,423			4,423
Comprehensive income	$	79,676
Stock-based compensation			—		978		—			—			978
Cash dividends declared:
Common stock, $0.24 per share			—		—		(13,893		)	—			(13,893		)
Balance, June 30, 2015			$	579	$	1,261,102	$	227,904		$	(1,734	)	$	1,487,851

See accompanying notes.

- 9-

GREAT WESTERN BANCORP, INC.

Consolidated Statements of Cash Flows (Unaudited)

(In Thousands)

	Nine Months Ended
	June 30, 2015			June 30, 2014
Operating activities
Net income	$	75,253		$	77,077
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	18,046			27,790
Net gain on sale of securities	(51		)	(6		)
Net gain on sale of loans	(5,027		)	(3,885		)
Net (gain) loss on sale of premises and equipment	(1,681		)	1,417
Net gain from sale of repossessed property and other assets	(1,836		)	(2,413		)
Provision (recovery) for loan losses	17,408			(2,065		)
Provision for repossessed assets	5,564			8,997
Proceeds from FDIC indemnification claims	1,666			5,330
Stock-based compensation	978			—
Originations of residential real estate loans held-for-sale	(212,144		)	(149,001		)
Proceeds from sales of residential real estate loans held-for-sale	218,379			150,163
Net deferred income taxes	3,107			(8,743		)
Changes in:
Accrued interest receivable	3,081			4,010
Other assets	(1,324		)	1,175
FDIC indemnification asset	8,033			8,128
FDIC clawback liability	708			682
Accrued interest payable and other liabilities	4,456			12,145
Net cash provided by operating activities	134,616			130,801
Investing activities
Purchase of securities available for sale	(327,955		)	(148,670		)
Proceeds from sales of securities available for sale	55,149			4,450
Proceeds from maturities of securities available for sale	205,609			229,275
Net increase in loans	(475,421		)	(351,360		)
Purchase of premises and equipment	(2,108		)	(2,263		)
Proceeds from sale of premises and equipment	2,765			743
Proceeds from sale of other assets	31,329			28,141
Purchase of FHLB stock	(365		)	(1,649		)
Net cash used in investing activities	(510,997		)	(241,333		)
Financing activities
Net increase in deposits	305,508			118,904
Net decrease in securities sold under agreements to repurchase	(128		)	(31,942		)
Net increase in FHLB advances and other borrowings	15,426			44,490
Dividends paid	(13,893		)	(68,000		)
Net cash provided by financing activities	306,913			63,452
Net decrease in cash and due from banks	(69,468		)	(47,080		)
Cash and due from banks, beginning of period	256,639			282,157
Cash and due from banks, end of period	$	187,171		$	235,077
Supplemental disclosures of cash flows information
Cash payments for interest	$	23,650		$	25,484
Cash payments for income taxes	$	42,088		$	45,520
Supplemental schedules of noncash investing and financing activities
Loans transferred to repossessed assets and other assets	$	7,447		$	31,493

See accompanying notes.

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GREAT WESTERN BANCORP, INC.

Notes to Consolidated Financial Statements (Unaudited)

1. Basis of Presentation

Great Western Bancorp, Inc. (the “Company”) is a bank holding company organized under the laws of Delaware. The primary business of the Company is ownership of its wholly owned subsidiary, Great Western Bank (the “Bank”). The Bank is a full-service regional bank focused on relationship-based business and agribusiness banking in Arizona, Colorado, Iowa, Kansas, Missouri, Nebraska, and South Dakota. The Company and the Bank are subject to the regulation of certain federal and/or state agencies and undergo periodic examinations by those regulatory authorities. Substantially all of the Company’s income is generated from banking operations.

The accompanying unaudited consolidated interim financial statements have been prepared in accordance with accounting principles generally accepted in the United States (“U.S. GAAP”) and reflect all adjustments that are, in the opinion of management, necessary for the fair presentation of the financial position and results of operations for the periods presented. All such adjustments are of a normal recurring nature other than the reclassifications outlined below. We have also reclassified certain prior year amounts to conform to prior periods, which did not have a material impact on our consolidated financial condition or results of operations.

The unaudited interim consolidated financial statements should be read in conjunction with the Company’s audited consolidated financial statements for the year ending September 30, 2014, which includes a description of significant accounting policies. The results of operations for interim periods are not necessarily indicative of the results that may be expected for the year or any other period.

The accompanying unaudited consolidated financial statements include the accounts and results of operations of the Company and its subsidiaries after elimination of all significant intercompany accounts and transactions. The preparation of unaudited consolidated financial statements in conformity with U.S. GAAP requires management to make certain estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. Actual results could differ from these estimates.

The Company has evaluated all events or transactions that occurred through the date the Company issued these financial statements. During this period, the Company did not have any material recognizable or non-recognizable subsequent events other than outlined below.

Prior to the initial public offering of shares of its common stock in October 2014, the Company was an indirect wholly-owned subsidiary of NAB. NAB sold 18.4 million shares, representing 31.8% of the Company's common stock, in the initial public offering. On May 6, 2015, NAB sold 23.0 million shares of the Company's common stock, representing 39.7% of the Company's common stock, in the second stage of its planned divestment. After completion of the May 6, 2015 offering, NAB beneficially owned 28.5% of the Company's outstanding common stock. On July 31, 2015, NAB sold all of its remaining shares of the Company's common stock in a secondary public offering of 13,819,596 shares and a concurrent share repurchase transaction in which the Company acquired 2,666,518 shares from NAB to fully divest its ownership.

On July 27, 2015, the board of directors of the Company declared a dividend of $0.12 per common share payable on August 28, 2015 to owners of record as of close of business on August 14, 2015.

On July 31, 2015, we repaid $41.3 million of outstanding subordinated capital notes and revolving lines of credit with NAB with a combination of available cash and the proceeds of a $35 million private placement of subordinated debt.

Changes in the Presentation of Results for Loans at Fair Value and Related Derivatives

In the normal course of business, the Company manages interest rate risk by entering into fixed-to-floating interest rate swaps related to all fixed-rate loans with original terms longer than five years. The Company has elected to account for these loans using the Fair Value Option. During the first quarter of fiscal year 2015, the Company identified an immaterial error in its reporting of one aspect of the derivatives related to these loans and also elected to change the presentation of the reported changes in fair value of these loans and related derivatives, each as discussed below. The Company's previous consolidated financial statements have been corrected or reclassified, as appropriate, to be consistent with the accompanying unaudited consolidated financial statements.

During the first quarter of fiscal year 2015, the Company identified that the current realized gain (loss) on the derivatives related to fair value loans has been improperly recorded as loan interest income instead of being presented in the same line item as the unrealized gain (loss) on the derivatives. As such, the realized gain (loss) on the derivatives related to fair value loans has been moved from loan interest income to "Net realized and unrealized gain (loss) on derivatives" within noninterest income. The Company has

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GREAT WESTERN BANCORP, INC.

Notes to Consolidated Financial Statements (Unaudited)

determined these corrections to be immaterial to the prior period financial statements and there was no effect on net income, equity or cash flows. The following table reflects the impact of the matter described above on previously filed financial statements:

	Previously Reported			Currently Reported
	Interest Income			Noninterest Income
Nine months ended June 30, 2014
Realized (loss) on derivatives	$	(13,277	)	$	(13,277	)
Nine months ended June 30, 2013
Realized (loss) on derivatives	$	(10,207	)	$	(10,207	)
Twelve months ended September 30, 2014
Realized (loss) on derivatives	$	(18,255	)	$	(18,255	)
Twelve months ended September 30, 2013
Realized (loss) on derivatives	$	(14,217	)	$	(14,217	)
Twelve months ended September 30, 2012
Realized (loss) on derivatives	$	(9,931	)	$	(9,931	)

Additionally, the Company previously reported the changes in fair value of these loans related to both interest rates and credit quality in interest income and the Company presented the changes in fair value of the derivatives in noninterest expense. Changes in fair value related to interest rates on the loans and changes in fair value of the derivatives were completely offset in any reporting period. To improve the clarity and comparability of its financial statements, the Company has elected to change its presentation of the changes in fair value related to these loans and derivatives by presenting these changes in two separate line items in noninterest income. As such, changes in fair value related to these loans, both related to interest rates and credit quality, is presented in "Net increase (decrease) in fair value of loans at fair value"within noninterest income, and changes in fair value related to these derivatives is presented in "Net realized and unrealized gain (loss) on derivatives" within noninterest income. The following table reflects the impact of the matter described above on previously filed financial statements:

- 12-

GREAT WESTERN BANCORP, INC.

Notes to Consolidated Financial Statements (Unaudited)

	Previously Reported						Currently Reported
	Interest Income			Noninterest Expense			Noninterest Income
Nine months ended June 30, 2014
Unrealized loss on derivatives	$	—		$	12,119		$	—		$	12,119
Loan fair value change related to interest rates	(12,119		)	—			(12,119		)	—
Loan fair value change related to credit quality	(1,387		)	—			(1,387		)	—
	$	(13,506	)	$	12,119		$	(13,506	)	$	12,119
Nine months ended June 30, 2013
Unrealized (gain) on derivatives	$	—		$	(41,635	)	$	—		$	(41,635	)
Loan fair value change related to interest rates	41,635			—			41,635			—
Loan fair value change related to credit quality	141			—			141			—
	$	41,776		$	(41,635	)	$	41,776		$	(41,635	)
Twelve months ended September 30, 2014
Unrealized loss on derivatives	$	—		$	11,922		$	—		$	11,922
Loan fair value change related to interest rates	(11,922		)	—			(11,922		)	—
Loan fair value change related to credit quality	18			—			18			—
	$	(11,904	)	$	11,922		$	(11,904	)	$	11,922
Twelve months ended September 30, 2013
Unrealized (gain) on derivatives	$	—		$	(40,305	)	$	—		$	(40,305	)
Loan fair value change related to interest rates	40,305			—			40,305			—
Loan fair value change related to credit quality	855			—			855			—
	$	41,160		$	(40,305	)	$	41,160		$	(40,305	)
Twelve months ended September 30, 2012
Unrealized loss on derivatives	$	—		$	19,369		$	—		$	19,369
Loan fair value change related to interest rates	(19,369		)	—			(19,369		)	—
Loan fair value change related to credit quality	4,276			—			4,276			—
	$	(15,093	)	$	19,369		$	(15,093	)	$	19,369

2. New Accounting Pronouncements

There have been no new applicable accounting pronouncements issued during the nine months ended June 30, 2015.

3. Restrictions on Cash and Due from Banks

The Company is required to maintain reserve balances in cash and on deposit with the Federal Reserve based on a percentage of deposits. The total requirement was approximately $42.9 million and $50.4 million at June 30, 2015 and September 30, 2014, respectively.

- 13-

GREAT WESTERN BANCORP, INC.

Notes to Consolidated Financial Statements (Unaudited)

4. Securities Available for Sale

The amortized cost and approximate fair value of investments in securities, all of which are classified as available for sale according to management’s intent, are summarized as follows (in thousands):

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
As of June 30, 2015
U.S. Treasury securities	$	300,501	$	2,744	$	(113	)	$	303,132
U.S. Agency securities	74,379		53		(57		)	74,375
Mortgage-backed securities:
Government National Mortgage Association	905,660		2,952		(7,055		)	901,557
Federal National Mortgage Association	47,727		—		(377		)	47,350
Small Business Assistance Program	77,122		—		(1,003		)	76,119
States and political subdivision securities	1,864		—		—			1,864
Corporate debt securities	4,996		34		—			5,030
Other	1,006		42		—			1,048
	$	1,413,255	$	5,825	$	(8,605	)	$	1,410,475

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
As of September 30, 2014
U.S. Treasury securities	$	222,868	$	31	$	(174	)	$	222,725
U.S. Agency securities	—		—		—			—
Mortgage-backed securities:
Government National Mortgage Association	1,113,363		4,639		(14,587		)	1,103,415
Federal National Mortgage Association	—		—		—			—
Small Business Assistance Program	—		—		—			—
States and political subdivision securities	2,188		1		—			2,189
Corporate debt securities	11,732		141		—			11,873
Other	1,006		34		—			1,040
	$	1,351,157	$	4,846	$	(14,761	)	$	1,341,242

The amortized cost and approximate fair value of debt securities available for sale as of June 30, 2015 and September 30, 2014, by contractual maturity, are shown below. Maturities of mortgage-backed securities may differ from contractual maturities because the mortgages underlying the securities may be called or repaid without any penalties.

- 14-

GREAT WESTERN BANCORP, INC.

Notes to Consolidated Financial Statements (Unaudited)

	June 30, 2015				September 30, 2014
(In Thousands)	Amortized Cost		Fair Value		Amortized Cost		Fair Value
Due in one year or less	$	75,053	$	75,050	$	7,207	$	7,218
Due after one year through five years	305,648		308,312		223,282		223,140
Due after five years through ten years	1,039		1,039		6,299		6,429
	381,740		384,401		236,788		236,787
Mortgage-backed securities	1,030,509		1,025,026		1,113,363		1,103,415
Securities without contractual maturities	1,006		1,048		1,006		1,040
	$	1,413,255	$	1,410,475	$	1,351,157	$	1,341,242

Proceeds from sales of securities available for sale were $0.0 million and $0.0 million for the three months ended June 30, 2015 and 2014, respectively, and $55.1 million and $4.5 million for the nine months ended June 30, 2015 and 2014, respectively. There were no sales of available for sale securities for the three months ended June 30, 2015 and 2014, and no gross gains or gross losses were realized. Gross gains of $0.6 million and $0.0 million and gross losses of $0.5 million and $0.0 million were realized on the sales for the nine months ended June 30, 2015 and 2014, respectively, using the specific identification method.

Securities with a carrying value of approximately $974.2 million and $1,132.3 million at June 30, 2015 and September 30, 2014, respectively, were pledged as collateral on public deposits, securities sold under agreements to repurchase, and for other purposes as required or permitted by law. The counterparties do not have the right to sell or pledge the securities the Company has pledged as collateral.

As detailed in the following tables, certain investments in debt securities, which are approximately 52% and 64% of the Company’s investment portfolio at June 30, 2015 and September 30, 2014, respectively, are reported in the consolidated financial statements at an amount less than their amortized cost. Based on evaluation of available evidence, including recent changes in market interest rates, credit rating information, implicit or explicit government guarantees, and information obtained from regulatory filings, management believes the declines in fair value of these securities are temporary. As the Company does not intend to sell the securities and it is not more likely than not that the Company will be required to sell the securities before the recovery of their amortized cost basis, which may be maturity, the Company does not consider the securities to be other than temporarily impaired at June 30, 2015 or September 30, 2014. The Company did not recognize any other-than-temporary impairment for the three and nine months ended June 30, 2015 and 2014.

The following table presents the Company’s gross unrealized losses and approximate fair value in investments, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position (in thousands):

	Less than 12 months					June 30, 2015 12 months or more					Total
	Fair Value		Unrealized			Fair Value		Unrealized			Fair Value		Unrealized
U.S. Treasury securities	$	18,364	$	(113	)	$	—	$	—		$	18,364	$	(113	)
U. S. Agency securities	49,577		(57		)	—		—			49,577		(57		)
Mortgage-backed securities	161,004		(1,607		)	507,944		(6,828		)	668,948		(8,435		)
	$	228,945	$	(1,777	)	$	507,944	$	(6,828	)	$	736,889	$	(8,605	)

	Less than 12 months					September 30, 2014 12 months or more					Total
	Fair Value		Unrealized			Fair Value		Unrealized			Fair Value		Unrealized
U.S. Treasury securities	$	98,344	$	(174	)	$	—	$	—		$	98,344	$	(174	)
U.S. Agency securities	—		—			—		—			—		—
Mortgage-backed securities	24,625		(125		)	730,171		(14,462		)	754,796		(14,587		)
	$	122,969	$	(299	)	$	730,171	$	(14,462	)	$	853,140	$	(14,761	)

- 15-

GREAT WESTERN BANCORP, INC.

Notes to Consolidated Financial Statements (Unaudited)

As of June 30, 2015 and September 30, 2014, the Company had 47 and 49 securities, respectively, in an unrealized loss position.

The Company’s investments in nonmarketable equity securities are all stock of the Federal Home Loan Bank ("FHLB"). The carrying value of Federal Home Loan Bank stock was $36.3 million and $35.9 million as of June 30, 2015 and September 30, 2014, respectively, and is reported in other assets on the consolidated balance sheets. No indicators of impairment related to FHLB stock were identified during the three and nine months ended June 30, 2015 and 2014.

The components of other comprehensive income from net unrealized gains (losses) on securities available for sale for the three and nine months ended June 30, 2015 and 2014, respectively are as follows (in thousands):

	Three Months Ended June 30,						Nine Months Ended June 30,
	2015			2014			2015			2014
Beginning balance accumulated other comprehensive income (loss)	$	2,111		$	(7,214	)	$	(6,157	)	$	(7,081	)
Net unrealized holding gain (loss) arising during the period	(6,099		)	7,752			7,186			7,363
Reclassification adjustment for net gain realized in net income	—			—			(51		)	(6		)
Net change in unrealized gain (loss) before income taxes	(6,099		)	7,752			7,135			7,357
Income tax (expense) benefit	2,254			(2,946		)	(2,712		)	(2,684		)
Net change in unrealized gain (loss) on securities after taxes	(3,845		)	4,806			4,423			4,673
Ending balance accumulated other comprehensive income (loss)	$	(1,734	)	$	(2,408	)	$	(1,734	)	$	(2,408	)

5. Loans

The composition of net loans as of June 30, 2015 and September 30, 2014, is as follows (in thousands):

	June 30, 2015			September 30, 2014
Residential real estate	$	922,481		$	901,605
Commercial real estate	2,720,993			2,541,194
Commercial non real estate	1,701,024			1,571,640
Agriculture	1,813,330			1,681,209
Consumer	75,311			90,086
Other	38,901			34,243
	7,272,040			6,819,977
Less:
Allowance for loan losses	(55,930		)	(47,518		)
Unamortized discount on acquired loans	(20,356		)	(25,638		)
Unearned net deferred fees and costs and loans in process	(6,445		)	(6,872		)
	$	7,189,309		$	6,739,949

The loan breakouts above include loans covered by FDIC loss sharing agreements totaling $102.2 million and $234.0 million as of June 30, 2015 and September 30, 2014, respectively, residential real estate loans held for sale totaling $9.2 million and $10.4 million at June 30, 2015 and September 30, 2014, respectively, and $1,063.7 million and $985.4 million of loans and written loan commitments accounted for at fair value as of June 30, 2015 and September 30, 2014, respectively.

Unamortized net deferred fees and costs totaled $6.8 million and $6.3 million as of June 30, 2015 and September 30, 2014, respectively.

- 16-

GREAT WESTERN BANCORP, INC.

Notes to Consolidated Financial Statements (Unaudited)

Loans in process represent loans that have been funded as of the balance sheet dates but not classified into a loan category and loan payments received as of the balance sheet dates that have not been applied to individual loan accounts. Loans in process totaled $(0.4) million and $0.6 million as of June 30, 2015 and September 30, 2014, respectively.

Loans guaranteed by agencies of the U.S. government totaled $108.6 million and $106.5 million at June 30, 2015 and September 30, 2014, respectively.

Principal balances of residential real estate loans sold totaled $79.5 million and $58.4 million for the three months ended June 30, 2015 and 2014, respectively and $213.4 million and $146.3 million for the nine months ended June 30, 2015 and 2014, respectively.

The following table presents the Company’s nonaccrual loans at June 30, 2015 and September 30, 2014 (in thousands), excluding loans covered under the FDIC loss-sharing agreements. Loans greater than 90 days past due and still accruing interest as of June 30, 2015 and September 30, 2014, were not significant.

Nonaccrual loans	June 30, 2015		September 30, 2014
Residential real estate	$	7,846	$	6,671
Commercial real estate	22,000		20,767
Commercial non real estate	8,198		4,908
Agriculture	21,709		11,453
Consumer	90		146
Total	$	59,843	$	43,945

The following table (in thousands) presents the Company’s past due loans at June 30, 2015 and September 30, 2014. This table is presented net of unamortized discount on acquired loans and excludes loans measured at fair value with changes in fair value reported in earnings of $1,063.7 million for June 30, 2015 and $985.4 million for September 30, 2014.

As of June 30, 2015	30-59 Days Past Due		60-89 Days Past Due		Greater Than 90 Days		Total Past Due		Current		Total Financing Receivables
Residential real estate	$	734	$	644	$	3,484	$	4,862	$	806,716	$	811,578
Commercial real estate	5,194		1,313		4,327		10,834		2,402,342		2,413,176
Commercial non real estate	1,867		121		5,213		7,201		1,257,382		1,264,583
Agriculture	1,650		221		7,470		9,341		1,472,970		1,482,311
Consumer	128		196		37		361		74,903		75,264
Other	—		—		—		—		38,901		38,901
	9,573		2,495		20,531		32,599		6,053,214		6,085,813
Loans covered by FDIC loss sharing agreements	1,267		371		1,012		2,650		99,553		102,203
Total	$	10,840	$	2,866	$	21,543	$	35,249	$	6,152,767	$	6,188,016

- 17-

GREAT WESTERN BANCORP, INC.

Notes to Consolidated Financial Statements (Unaudited)

As of September 30, 2014	30-59 Days Past Due		60-89 Days Past Due		90 Days or Greater Past Due		Total Past Due		Current		Total Financing Receivables
Residential real estate	$	675	$	611	$	2,581	$	3,867	$	760,887	$	764,754
Commercial real estate	11,050		819		3,384		15,253		1,988,585		2,003,838
Commercial non real estate	1,761		6,228		744		8,733		1,303,925		1,312,658
Agriculture	16		368		4,205		4,589		1,364,960		1,369,549
Consumer	244		18		49		311		89,528		89,839
Other	—		—		—		—		34,243		34,243
	13,746		8,044		10,963		32,753		5,542,128		5,574,881
Loans covered by FDIC loss sharing agreements	1,960		1,252		3,728		6,940		227,096		234,036
Total	$	15,706	$	9,296	$	14,691	$	39,693	$	5,769,224	$	5,808,917

The composition of the loan portfolio by internally assigned grade is as follows as of June 30, 2015 and September 30, 2014. This table (in thousands) is presented net of unamortized discount on acquired loans and excludes loans measured at fair value with changes in fair value reported in earnings of $1,063.7 million for June 30, 2015 and $985.4 million for September 30, 2014:

As of June 30, 2015	Residential Real Estate		Commercial Real Estate		Commercial Non Real Estate		Agriculture		Consumer		Other		Total
Credit Risk Profile by Internally Assigned Grade
Grade:
Pass	$	794,153	$	2,260,026	$	1,147,017	$	1,262,624	$	74,951	$	38,901	$	5,577,672
Watchlist	5,142		98,836		51,606		166,583		89		—		322,256
Substandard	11,895		54,109		64,768		51,761		223		—		182,756
Doubtful	384		205		1,192		1,112		1		—		2,894
Loss	4		—		—		231		—		—		235
Ending balance	811,578		2,413,176		1,264,583		1,482,311		75,264		38,901		6,085,813
Loans covered by FDIC loss sharing agreements	102,203		—		—		—		—		—		102,203
Total	$	913,781	$	2,413,176	$	1,264,583	$	1,482,311	$	75,264	$	38,901	$	6,188,016

- 18-

GREAT WESTERN BANCORP, INC.

Notes to Consolidated Financial Statements (Unaudited)

As of September 30, 2014	Residential Real Estate		Commercial Real Estate		Commercial Non Real Estate		Agriculture		Consumer		Other		Total
Credit Risk Profile by Internally Assigned Grade
Grade:
Pass	$	747,485	$	1,867,866	$	1,218,558	$	1,202,145	$	89,197	$	34,243	$	5,159,494
Watchlist	5,320		84,132		65,628		132,262		381		—		287,723
Substandard	11,290		51,692		27,499		35,107		242		—		125,830
Doubtful	659		148		798		35		19		—		1,659
Loss	—		—		175		—		—		—		175
Ending balance	764,754		2,003,838		1,312,658		1,369,549		89,839		34,243		5,574,881
Loans covered by FDIC loss sharing agreements	127,115		95,467		9,390		2,004		60		—		234,036
Total	$	891,869	$	2,099,305	$	1,322,048	$	1,371,553	$	89,899	$	34,243	$	5,808,917

Impaired Loans

The following table presents the Company’s impaired loans (in thousands). This table excludes loans covered by FDIC loss sharing agreements:

	Recorded Investment		Unpaid Principal Balance		Related Allowance		Average Recorded Investment
As of June 30, 2015
Impaired loans:
With an allowance recorded:
Residential real estate	$	12,481	$	12,678	$	2,582	$	12,294
Commercial real estate	77,015		78,947		3,006		69,585
Commercial non real estate	68,694		78,557		6,733		50,608
Agriculture	53,104		53,541		3,743		44,316
Consumer	224		312		45		252
	$	211,518	$	224,035	$	16,109	$	177,055

	Recorded Investment		Unpaid Principal Balance		Related Allowance		Average Recorded Investment
As of September 30, 2014
Impaired loans:
With an allowance recorded:
Residential real estate	$	12,107	$	12,737	$	2,529	$	13,572
Commercial real estate	62,155		64,597		2,017		84,490
Commercial non real estate	35,522		37,882		3,927		31,827
Agriculture	35,528		37,958		1,155		30,546
Consumer	280		491		51		346
	$	145,592	$	153,665	$	9,679	$	160,781

There are no impaired loans without a valuation allowance, other than those loans for which the Company has claim to collateral with value(s) in excess of the outstanding loan amount, after allowing for the cost of liquidating the collateral as of June 30, 2015 and

- 19-

GREAT WESTERN BANCORP, INC.

Notes to Consolidated Financial Statements (Unaudited)

September 30, 2014. The average recorded investment on impaired loans for the three months ended June 30, 2015 and 2014 totaled $192.6 million and $165.2 million, respectively, and $177.0 million and $170.5 million for the nine months ended June 30, 2015 and 2014, respectively. Interest income recognized on impaired loans for the three months ended June 30, 2015 and 2014 totaled $2.3 million and $1.2 million, respectively and $7.1 million and $4.6 million for the nine months ended June 30, 2015 and 2014, respectively.

Valuation adjustments made to repossessed properties for the three months ended June 30, 2015 and 2014, totaled $1.2 million and $8.2 million, respectively, and $5.6 million and $9.3 million for the nine months ended June 30, 2015 and 2014, respectively. The adjustments are included in other noninterest expense.

Troubled Debt Restructured Loans

Included in certain loan categories in the impaired loans are troubled debt restructurings (“TDRs”) that were classified as impaired. These TDRs do not include purchased impaired loans. When the Company grants concessions to borrowers such as reduced interest rates or extensions of loan periods that would not be considered other than because of borrowers’ financial difficulties, the modification is considered a TDR. Specific reserves included in the allowance for loan losses for TDRs were $3.0 million and $3.2 million at June 30, 2015 and September 30, 2014, respectively. Commitments to lend additional funds to borrowers whose loans were modified in a TDR were not significant as of June 30, 2015 or September 30, 2014.

The following table presents the recorded value of the Company’s TDR balances as of June 30, 2015 and September 30, 2014 (in thousands):

	June 30, 2015				September 30, 2014
	Accruing		Nonaccrual		Accruing		Nonaccrual
Residential real estate	$	668	$	1,536	$	1,112	$	1,730
Commercial real estate	44,170		4,680		25,177		6,884
Commercial non real estate	9,961		1,101		6,753		1,785
Agriculture	80		7,440		3,780		9,994
Consumer	37		7		35		22
Total	$	54,916	$	14,764	$	36,857	$	20,415

- 20-

GREAT WESTERN BANCORP, INC.

Notes to Consolidated Financial Statements (Unaudited)

The following table presents a summary of all accruing loans restructured in TDRs during the three months ended June 30, 2015 and 2014, respectively:

	Three Months Ended June 30,
	2015					2014
		Recorded Investment					Recorded Investment
($ in thousands)	Number	Pre- Modification		Post- Modification		Number	Pre- Modification		Post- Modification
Residential real estate
Rate modification	—	$	—	$	—	—	$	—	$	—
Term extension	1	35		35		—	—		—
Payment modification	—	—		—		1	35		35
Bankruptcy	—	—		—		—	—		—
Other	—	—		—		—	—		—
Total residential real estate	1	35		35		1	35		35
Commercial real estate
Rate modification	—	—		—		—	—		—
Term extension	1	574		574		—	—		—
Payment modification	—	—		—		1	1,841		1,841
Bankruptcy	—	—		—		—	—		—
Other	—	—		—		—	—		—
Total commercial real estate	1	574		574		1	1,841		1,841
Commercial non real estate
Rate modification	—	—		—		—	—		—
Term extension	—	—		—		1	79		79
Payment modification	—	—		—		1	2,182		2,182
Bankruptcy	—	—		—		—	—		—
Other	—	—		—		1	2		2
Total commercial non real estate	—	—		—		3	2,263		2,263
Agriculture
Rate modification	—	—		—		—	—		—
Term extension	—	—		—		—	—		—
Payment modification	—	—		—		—	—		—
Bankruptcy	—	—		—		—	—		—
Other	—	—		—		—	—		—
Total agriculture	—	—		—		—	—		—
Consumer
Rate modification	—	—		—		—	—		—
Term extension	—	—		—		—	—		—
Payment modification	1	18		18		1	11		11
Bankruptcy	—	—		—		—	—		—
Other	—	—		—		—	—		—
Total consumer	1	18		18		1	11		11
Total accruing	3	$	627	$	627	6	$	4,150	$	4,150
Change in recorded investment due to principal paydown at time of modification	—	$	—	$	—	—	$	—	$	—
Change in recorded investment due to chargeoffs at time of modification	—	$	—	$	—	—	$	—	$	—

- 21-

GREAT WESTERN BANCORP, INC.

Notes to Consolidated Financial Statements (Unaudited)

The following table presents a summary of all accruing loans restructured in TDRs during the nine months ended June 30, 2015 and 2014:

	Nine Months Ended June 30,
	2015					2014
		Recorded Investment					Recorded Investment
($ in thousands)	Number	Pre- Modification		Post- Modification		Number	Pre- Modification		Post- Modification
Residential real estate
Rate modification	1	$	15	$	15	—	$	—	$	—
Term extension	1	35		35		2	74		74
Payment modification	—	—		—		2	50		50
Bankruptcy	—	—		—		1	130		130
Other	1	21		21		—	—		—
Total residential real estate	3	71		71		5	254		254
Commercial real estate
Rate modification	—	—		—		—	—		—
Term extension	2	664		574		—	—		—
Payment modification	6	22,542		22,542		2	2,911		2,911
Bankruptcy	1	498		498		—	—		—
Other	—	—		—		—	—		—
Total commercial real estate	9	23,704		23,614		2	2,911		2,911
Commercial non real estate
Rate modification	1	32		32		—	—		—
Term extension	3	2,879		2,879		5	1,813		1,813
Payment modification	2	1,874		1,874		5	2,917		2,917
Bankruptcy	—	—		—		—	—		—
Other	—	—		—		2	329		329
Total commercial non real estate	6	4,785		4,785		12	5,059		5,059
Agriculture
Rate modification	—	—		—		—	—		—
Term extension	—	—		—		—	—		—
Payment modification	—	—		—		—	—		—
Bankruptcy	—	—		—		—	—		—
Other	—	—		—		—	—		—
Total agriculture	—	—		—		—	—		—
Consumer
Rate modification	—	—		—		—	—		—
Term extension	—	—		—		—	—		—
Payment modification	1	18		18		3	15		15
Bankruptcy	1	6		6		—	—		—
Other	—	—		—		2	28		28
Total consumer	2	24		24		5	43		43
Total accruing	20	$	28,584	$	28,494	24	$	8,267	$	8,267
Change in recorded investment due to principal paydown at time of modification	—	$	—	$	—	—	$	—	$	—
Change in recorded investment due to chargeoffs at time of modification	1	$	90	$	—	—	$	—	$	—

- 22-

GREAT WESTERN BANCORP, INC.

Notes to Consolidated Financial Statements (Unaudited)

The following table presents a summary of all non-accruing loans restructured in TDRs during the three months ended June 30, 2015 and 2014:

	Three Months Ended June 30,
	2015					2014
		Recorded Investment					Recorded Investment
($ in thousands)	Number	Pre- Modification		Post- Modification		Number	Pre- Modification		Post- Modification
Residential real estate
Rate modification	—	$	—	$	—	—	$	—	$	—
Term extension	1	—		—		1	8		8
Payment modification	1	19		19		1	11		11
Bankruptcy	—	—		—		—	—		—
Other	1	25		10		—	—		—
Total residential real estate	3	44		29		2	19		19
Commercial real estate
Rate modification	—	—		—		—	—		—
Term extension	—	—		—		—	—		—
Payment modification	—	—		—		—	—		—
Bankruptcy	—	—		—		—	—		—
Other	—	—		—		—	—		—
Total commercial real estate	—	—		—		—	—		—
Commercial Non Real Estate
Rate modification	—	—		—		—	—		—
Term extension	1	77		—		—	—		—
Payment modification	1	4		4		1	36		36
Bankruptcy	—	—		—		—	—		—
Other	—	—		—		—	—		—
Total commercial non real estate	2	81		4		1	36		36
Agriculture
Rate modification	—	—		—		—	—		—
Term extension	—	—		—		—	—		—
Payment modification	—	—		—		—	—		—
Bankruptcy	—	—		—		—	—		—
Other	—	—		—		—	—		—
Total agriculture	—	—		—		—	—		—
Consumer
Rate modification	—	—		—		—	—		—
Term extension	1	1		1		—	—		—
Payment modification	—	—		—		—	—		—
Bankruptcy	—	—		—		—	—		—
Other	—	—		—		—	—		—
Total consumer	1	1		1		—	—		—
Total non-accruing	6	$	126	$	34	3	$	55	$	55
Change in recorded investment due to principal paydown at time of modification	—	$	—	$	—	—	$	—	$	—
Change in recorded investment due to chargeoffs at time of modification	2	$	92	$	—	—	$	—	$	—

- 23-

GREAT WESTERN BANCORP, INC.

Notes to Consolidated Financial Statements (Unaudited)

The following table presents a summary of all non-accruing loans restructured in TDRs during the nine months ended June 30, 2015 and 2014:

	Nine Months Ended June 30,
	2015					2014
		Recorded Investment					Recorded Investment
($ in thousands)	Number	Pre- Modification		Post- Modification		Number	Pre- Modification		Post- Modification
Residential real estate
Rate modification	2	$	104	$	104	4	$	98	$	98
Term extension	2	77		77		3	26		26
Payment modification	1	19		19		1	11		11
Bankruptcy	1	43		43		1	4		4
Other	1	25		10		1	38		38
Total residential real estate	7	268		253		10	177		177
Commercial real estate
Rate modification	—	—		—		2	500		500
Term extension	—	—		—		2	4,031		4,031
Payment modification	—	—		—		—	—		—
Bankruptcy	—	—		—		—	—		—
Other	—	—		—		1	87		87
Total commercial real estate	—	—		—		5	4,618		4,618
Commercial Non Real Estate
Rate modification	—	—		—		—	—		—
Term extension	5	294		217		8	125		125
Payment modification	1	4		4		1	36		36
Bankruptcy	—	—		—		1	10		10
Other	—	—		—		—	—		—
Total commercial non real estate	6	298		221		10	171		171
Agriculture
Rate modification	—	—		—		—	—		—
Term extension	—	—		—		2	260		260
Payment modification	—	—		—		—	—		—
Bankruptcy	—	—		—		—	—		—
Other	—	—		—		—	—		—
Total agriculture	—	—		—		2	260		260
Consumer
Rate modification	—	—		—		—	—		—
Term extension	2	2		2		1	11		11
Payment modification	—	—		—		—	—		—
Bankruptcy	—	—		—		—	—		—
Other	—	—		—		1	1		1
Total consumer	2	2		2		2	12		12
Total non-accruing	15	$	568	$	476	29	$	5,238	$	5,238
Change in recorded investment due to principal paydown at time of modification	—	$	—	$	—	—	$	—	$	—
Change in recorded investment due to chargeoffs at time of modification	2	$	92	$	—	—	$	—	$	—

- 24-

GREAT WESTERN BANCORP, INC.

Notes to Consolidated Financial Statements (Unaudited)

The tables below represent defaults on loans that were first modified during the respective past 12 months, that became 90 days or more delinquent or were charged-off during the three and nine months ended June 30, 2015 and 2014, respectively.

	Three Months Ended June 30,
	2015			2014
($ in thousands)	Number of Loans	Recorded Investment		Number of Loans	Recorded Investment
Residential real estate	1	$	10	—	$	—
Commercial real estate	—	—		—	—
Commercial non real estate	2	32		1	15
Agriculture	3	782		—	—
Consumer	—	—		—	—
	6	$	824	1	$	15

	Nine Months Ended June 30,
	2015			2014
($ in thousands)	Number of Loans	Recorded Investment		Number of Loans	Recorded Investment
Residential real estate	4	$	353	2	$	337
Commercial real estate	—	—		2	7,053
Commercial non real estate	4	32		4	537
Agriculture	3	782		7	7,361
Consumer	—	—		—	—
	11	$	1,167	15	$	15,288

The majority of loans that were modified and subsequently became 90 days or more delinquent have remained on nonaccrual status since the time of modification.

6. Allowance for Loan Losses

The following tables presents the Company’s allowance for loan losses roll forward for the three and nine month periods ended June 30, 2015 and 2014.

Three Months Ended June 30, 2015	Residential Real Estate			Commercial Real Estate			Commercial Non Real Estate			Agriculture			Consumer			Other			Total
Beginning balance April 1, 2015	$	7,495		$	15,736		$	15,957		$	12,222		$	189		$	827		$	52,426
Charge-offs	(77		)	(280		)	(1,337		)	(411		)	(31		)	(356		)	(2,492		)
Recoveries	84			205			949			10			32			306			1,586
Provision	(325		)	2,130			1,381			1,545			164			96			4,991
(Impairment) improvement of loans acquired with deteriorated credit quality	(625		)	45			—			—			(1		)	—			(581		)
Ending balance June 30, 2015	$	6,552		$	17,836		$	16,950		$	13,366		$	353		$	873		$	55,930

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GREAT WESTERN BANCORP, INC.

Notes to Consolidated Financial Statements (Unaudited)

Three Months Ended June 30, 2014	Residential Real Estate			Commercial Real Estate			Commercial Non Real Estate			Agriculture			Consumer			Other			Total
Beginning balance April 1, 2014	$	10,277		$	17,603		$	10,275		$	7,903		$	430		$	665		$	47,153
Charge-offs	(144		)	(539		)	(1,884		)	(566		)	(39		)	(198		)	(3,370		)
Recoveries	94			497			469			14			69			612			1,755
Provision	187			494			727			389			(68		)	(229		)	1,500
(Impairment) improvement of loans acquired with deteriorated credit quality	—			—			—			—			—			—			—
Ending balance June 30, 2014	$	10,414		$	18,055		$	9,587		$	7,740		$	392		$	850		$	47,038

Nine Months Ended June 30, 2015	Residential Real Estate			Commercial Real Estate			Commercial Non Real Estate			Agriculture			Consumer			Other			Total
Beginning balance October 1, 2014	$	8,342		$	16,884		$	10,550		$	10,655		$	264		$	823		$	47,518
Charge-offs	(197		)	(1,932		)	(9,861		)	(438		)	(88		)	(1,187		)	(13,703		)
Recoveries	197			300			3,092			89			79			950			4,707
Provision	(515		)	2,476			13,169			3,060			123			287			18,600
(Impairment) improvement of loans acquired with deteriorated credit quality	(1,275		)	108			—			—			(25		)	—			(1,192		)
Ending balance June 30, 2015	$	6,552		$	17,836		$	16,950		$	13,366		$	353		$	873		$	55,930

Nine Months Ended June 30, 2014	Residential Real Estate			Commercial Real Estate			Commercial Non Real Estate			Agriculture			Consumer			Other			Total
Beginning balance October 1, 2013	$	11,779		$	22,562		$	11,222		$	9,296		$	312		$	693		$	55,864
Charge-offs	(581		)	(3,733		)	(2,883		)	(2,652		)	(191		)	(1,154		)	(11,194		)
Recoveries	190			1,521			1,228			29			136			1,329			4,433
Provision	201			(2,903		)	1,461			1,067			67			(18		)	(125		)
(Impairment) improvement of loans acquired with deteriorated credit quality	(1,175		)	608			(1,441		)	—			68			—			(1,940		)
Ending balance June 30, 2014	$	10,414		$	18,055		$	9,587		$	7,740		$	392		$	850		$	47,038

The following tables provide details regarding the allowance for loan and lease losses and balance by type of allowance. These tables (in thousands) are presented net of unamortized discount on acquired loans and excludes loans measured at fair value with changes in fair value reported in earnings of $1,063.7 million, loans held for sale of $9.2 million, and guaranteed loans of $108.6 million for June 30, 2015 and loans measured at fair value with changes in fair value reported in earnings of $985.4 million, loans held for sale of $10.4 million, and guaranteed loans of $106.5 million for September 30, 2014.

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GREAT WESTERN BANCORP, INC.

Notes to Consolidated Financial Statements (Unaudited)

As of June 30, 2015	Residential Real Estate		Commercial Real Estate		Commercial Non Real Estate		Agriculture		Consumer		Other		Total
Allowance for loan losses
Individually evaluated for impairment	$	2,581	$	2,879	$	6,712	$	3,743	$	45	$	—	$	15,960
Collectively evaluated for impairment	2,461		11,952		10,238		9,623		308		873		35,455
Loans acquired with deteriorated credit quality	1,510		1,255		—		—		—		—		2,765
Loans acquired without deteriorated credit quality	—		1,750		—		—		—		—		1,750
Total allowance	$	6,552	$	17,836	$	16,950	$	13,366	$	353	$	873	$	55,930
Financing Receivables
Individually evaluated for impairment	$	9,125	$	47,069	$	67,369	$	43,113	$	165	$	—	$	166,841
Collectively evaluated for impairment	709,265		2,225,924		1,140,921		1,411,741		72,421		38,901		5,599,173
Loans acquired with deteriorated credit quality	86,569		23,402		2,889		1,567		1,374		—		115,801
Loans acquired without deteriorated credit quality	98,071		65,918		5,445		17,683		1,304		—		188,421
Loans Outstanding	$	903,030	$	2,362,313	$	1,216,624	$	1,474,104	$	75,264	$	38,901	$	6,070,236

- 27-

GREAT WESTERN BANCORP, INC.

Notes to Consolidated Financial Statements (Unaudited)

As of September 30, 2014	Residential Real Estate		Commercial Real Estate		Commercial Non Real Estate		Agriculture		Consumer		Other		Total
Allowance for loan losses
Individually evaluated for impairment	$	2,528	$	1,953	$	3,909	$	1,152	$	51	$	—	$	9,593
Collectively evaluated for impairment	3,030		12,034		6,641		9,503		188		823		32,219
Loans acquired with deteriorated credit quality	2,784		645		—		—		25		—		3,454
Loans acquired without deteriorated credit quality	—		2,252		—		—		—		—		2,252
Total allowance	$	8,342	$	16,884	$	10,550	$	10,655	$	264	$	823	$	47,518
Financing Receivables
Individually evaluated for impairment	$	9,384	$	38,457	$	28,298	$	25,655	$	166	$	—	$	101,960
Collectively evaluated for impairment	649,970		1,874,474		1,224,035		1,319,343		85,065		34,243		5,187,130
Loans acquired with deteriorated credit quality	102,987		49,202		6,361		1,746		1,843		—		162,139
Loans acquired without deteriorated credit quality	117,630		95,323		7,409		17,655		2,825		—		240,842
Loans Outstanding	$	879,971	$	2,057,456	$	1,266,103	$	1,364,399	$	89,899	$	34,243	$	5,692,071

The reserve for unfunded loan commitments was $0.4 million at both June 30, 2015 and September 30, 2014.

- 28-

GREAT WESTERN BANCORP, INC.

Notes to Consolidated Financial Statements (Unaudited)

7. Accounting for Certain Loans Acquired with Deteriorated Credit Quality

In June 2010, the Company acquired certain loans that had deteriorated credit quality. Loan accounting specific to these purchased impaired loans addresses differences between contractual cash flows expected to be collected from the initial investment in loans if those differences are attributable, at least in part, to credit quality. Several factors were considered when evaluating whether a loan was considered a purchased impaired loan, including the delinquency status of the loan, updated borrower credit status, geographic information, and updated loan-to-values (“LTV”). U.S. GAAP allows purchasers to aggregate purchased impaired loans acquired in the same fiscal quarter in one or more pools, provided that the loans have common risk characteristics. A pool is then accounted for as a single asset with a single composite interest rate and an aggregate expectation of cash flows.

Loan pools are periodically reassessed to determine expected cash flows. In determining the expected cash flows, the timing of cash flows and prepayment assumptions for smaller, homogenous loans are based on statistical models that take into account factors such as the loan interest rate, credit profile of the borrowers, the years in which the loans were originated, and whether the loans are fixed or variable rate loans. Prepayments may be assumed on large individual loans that consider similar prepayment factors listed above for smaller homogenous loans. The re-assessment of purchased impaired loans resulted in the following changes in the accretable yield during the three and nine months ended June 30, 2015 and 2014 (in thousands):

	Three Months Ended June 30,						Nine Months Ended June 30,
	2015			2014			2015			2014
Balance at beginning of period	$	43,431		$	56,415		$	50,889		$	67,660
Accretion	(3,240		)	(4,642		)	(11,249		)	(14,016		)
Reclassification from nonaccretable difference	7,736			227			8,367			3,175
Disposals	(1,038		)	(185		)	(1,118		)	(5,004		)
Balance at end of period	$	46,889		$	51,815		$	46,889		$	51,815

The reclassifications from nonaccretable difference noted in the table above represent instances where specific pools of loans are expected to perform better over the remaining lives of the loans than expected at the prior re-assessment date.

The following table provides purchased impaired loans at June 30, 2015 and September 30, 2014 (in thousands):

	June 30, 2015						September 30, 2014
	Outstanding Balance 1		Recorded Investment 2		Carrying Value 3		Outstanding Balance 1		Recorded Investment 2		Carrying Value 3
Residential real estate	$	98,677	$	86,569	$	85,059	$	115,863	$	102,987	$	100,203
Commercial real estate	100,075		23,402		22,147		130,825		49,202		48,557
Commercial non real estate	11,092		2,889		2,889		16,697		6,361		6,361
Agriculture	1,567		1,567		1,567		1,747		1,746		1,746
Consumer	1,474		1,374		1,374		2,019		1,843		1,818
Total lending	$	212,885	$	115,801	$	113,036	$	267,151	$	162,139	$	158,685

^{1    Represents the legal balance of loans acquired with deteriorated credit quality.}  

^{2    Represents the book balance of loans acquired with deteriorated credit quality.}  

^{3    Represents the book balance of loans acquired with deteriorated credit quality net of the related allowance for loan losses.} 

Due to improved cash flows of the purchased impaired loans, the reductions to allowance recognized on previous impairments were $0.9 million and $0.0 million for the three months ended June 30, 2015 and 2014, respectively and $1.9 million and $3.6 million for the nine months ended June 30, 2015 and 2014, respectively.

- 29-

GREAT WESTERN BANCORP, INC.

Notes to Consolidated Financial Statements (Unaudited)

8. FDIC Indemnification Asset

Under the terms of the purchase and assumption agreement with the FDIC with regard to the TierOne Bank acquisition, the Company is reimbursed for a portion of the losses incurred on covered assets. As covered assets are resolved, whether it be through repayment, short sale of the underlying collateral, the foreclosure on or sale of collateral, or the sale or charge-off of loans or OREO, any differences between the carrying value of the covered assets versus the payments received during the resolution process, that are reimbursable by the FDIC, are recognized as reductions in the FDIC indemnification asset. Any gains or losses realized from the resolution of covered assets reduce or increase, respectively, the amount recoverable from the FDIC. The following table represents a summary of the activity related to the FDIC indemnification asset for the three and nine months ended June 30, 2015 and 2014 (in thousands):

	Three Months Ended June 30,						Nine Months Ended June 30,
	2015			2014			2015			2014
Balance at beginning of period	$	19,895		$	37,775		$	26,678		$	45,690
Amortization	(1,754		)	(3,256		)	(6,347		)	(11,203		)
Changes in expected reimbursements from FDIC for changes in expected credit losses	15			958			(175		)	550
Changes in reimbursable expenses	(1,148		)	(280		)	(1,511		)	2,525
Payments to/(from) the FDIC	(29		)	(2,965		)	(1,666		)	(5,330		)
Balance at end of period	$	16,979		$	32,232		$	16,979		$	32,232

The loss claims filed are subject to review, approval, and annual audits by the FDIC or its assigned agents for compliance with the terms in the loss sharing agreements. The commercial loss share agreement claim period ended on June 4, 2015. The non-commerical loss share agreement ends June 4, 2020.

9. Derivative Financial Instruments

In the normal course of business, the Company uses interest rate swaps to manage its interest rate risk and market risk in accommodating the needs of its customers. Also, the Company enters into interest rate lock commitments on mortgage loans to be held for sale, with corresponding forward sales contracts related to these interest rate lock commitments.

Derivative instruments are recognized as either assets or liabilities in the accompanying consolidated financial statements and are measured at fair value.

- 30-

GREAT WESTERN BANCORP, INC.

Notes to Consolidated Financial Statements (Unaudited)

The following table summarizes the notional amounts and estimated fair values of the Company’s derivative instruments at June 30, 2015 and September 30, 2014 (in thousands).

	June 30, 2015
	Notional Amount		Balance Sheet Location	Positive Fair Value		Negative Fair Value
Derivatives not designated as hedging instruments:
Interest rate swaps	$	1,065,703	Liabilities	$	2,867	$	(27,292	)
Mortgage loan commitments	33,626		Assets	1		—
Mortgage loan forward sale contracts	38,882		Liabilities	—		(1		)

	September 30, 2014
	Notional Amount		Balance Sheet Location	Positive Fair Value		Negative Fair Value
Derivatives not designated as hedging instruments:
Interest rate swaps	$	986,440	Liabilities	$	6,213	$	(19,286	)
Mortgage loan commitments	22,563		Assets	19		—
Mortgage loan forward sale contracts	28,459		Liabilities	—		(19		)

As with any financial instrument, derivative financial instruments have inherent risk including adverse changes in interest rates. The Company’s exposure to derivative credit risk is defined as the possibility of sustaining a loss due to the failure of the counterparty to perform in accordance with the terms of the contract. Credit risks associated with interest rate swaps are similar to those relating to traditional on-balance sheet financial instruments. The Company manages interest rate swap credit risk with the same standards and procedures applied to its commercial lending activities. Amounts due from swap counterparties to reclaim cash collateral under the interest rate swap master netting arrangements have not been offset against the derivative balances.

The effect of derivatives on the consolidated statements of comprehensive income for the three and nine months ended June 30, 2015 and 2014 (in thousands) was as follows:

		Amount of Gain (Loss) Recognized in Income
		Three Months Ended June 30,						Nine Months Ended June 30,
	Location of Gain (Loss) Recognized in Income	2015			2014			2015			2014
Derivatives not designated as hedging instruments:
Interest rate swaps	Noninterest income	$	18,946		$	(17,797	)	$	(27,357	)	$	(25,396	)
Mortgage loan commitments	Noninterest income	(26		)	6			1			40
Mortgage loan forward sale contracts	Noninterest income	26			(6		)	(1		)	(40		)

Netting of Derivatives

The Company has various financial assets and financial liabilities that are subject to enforceable master netting agreements or similar agreements. The Company has entered into an ISDA master netting arrangement with various swap counterparties. Under the terms of the master netting arrangements, all transactions between the Company and the counterparty constitute a single business relationship such that in the event of default, the non-defaulting party is entitled to set off claims and apply property held by that party in respect of any transaction against obligations owed. Any payments, deliveries, or other transfers may be applied against each other and netted.

The table below shows total gross derivative assets and liabilities which are adjusted on an aggregate basis, where applicable to take into consideration the effects of legally enforceable master netting agreements for the net reported amount in the consolidated balance sheets. These amounts are offset on the consolidated balance sheets.

- 31-

GREAT WESTERN BANCORP, INC.

Notes to Consolidated Financial Statements (Unaudited)

The following tables (in thousands) present the Company's gross derivative financial assets and liabilities at June 30, 2015 and September 30, 2014, and the related impact of enforceable master netting arrangements and cash collateral, where applicable:

	Gross Amount			Amount Offset			Net Amount Presented in Consolidated Balance Sheets			Held/Pledged Financial Instruments1		Net Amount
June 30, 2015
Derivative financial assets:
Derivatives subject to master netting arrangement or similar arrangement	$	2,867		$	(2,867	)	$	—		$	—	$	—
Derivative financial liabilities:
Derivatives subject to master netting arrangement or similar arrangement	(27,292		)	2,867			(24,425		)	24,425		—
Total derivative financial liabilities	$	(24,425	)	$	—		$	(24,425	)	$	24,425	$	—

¹ The actual amount of collateral exceeds the fair value exposure, at the individual counterparty level, as of the date presented.

	Gross Amount			Amount Offset			Net Amount Presented in Consolidated Balance Sheets			Held/Pledged Financial Instruments		Net Amount
September 30, 2014
Derivative financial assets:
Derivatives subject to master netting arrangement or similar arrangement	$	6,213		$	(6,213	)	$	—		$	—	$	—
Derivative financial liabilities:
Derivatives subject to master netting arrangement or similar arrangement	(19,286		)	6,213			(13,073		)	13,073		—
Total derivative financial liabilities	$	(13,073	)	$	—		$	(13,073	)	$	13,073	$	—

10. The Fair Value Option

The Company has elected to measure certain long-term loans and written loan commitments at fair value to assist in managing the interest rate risk for longer-term loans. This fair value option was elected upon the origination of these loans. Interest income is recognized in the same manner as interest on non-fair value loans.

See Note 17 for additional disclosures regarding the fair value of the fair value option loans and written loan commitments.

Long-term loans and written loan commitments for which the fair value option has been elected had a net favorable difference between the aggregate fair value and the aggregate unpaid loan principal balance and written loan commitment amount of approximately $18.9 million and $7.1 million at June 30, 2015 and September 30, 2014, respectively. The total unpaid principal balance of these long-term loans was approximately $1,044.7 million and $978.3 million at June 30, 2015 and September 30, 2014, respectively. The fair value of these loans and written loan commitments is included in total loans in the consolidated balance sheets and are grouped with commercial non real estate, commercial real estate, and agricultural loans in Note 5. The fair value of these written loan commitments was not material at June 30, 2015 and September 30, 2014, respectively. None of the noted loans were greater than 90 days past due or in nonaccrual status as of June 30, 2015 or September 30, 2014.

Changes in fair value for items for which the fair value option has been elected and the line items in which these changes are reported are as follows for the three and nine months ended June 30, 2015 and 2014 (in thousands):

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GREAT WESTERN BANCORP, INC.

Notes to Consolidated Financial Statements (Unaudited)

	For the Three Months Ended										For the Nine Months Ended
	June 30, 2015						June 30, 2014				June 30, 2015				June 30, 2014
	Noninterest Income /(Loss)			Total Changes in Fair Value			Noninterest Income		Total Changes in Fair Value		Noninterest Income		Total Changes in Fair Value		Noninterest Income		Total Changes in Fair Value
Long-term loans and written loan commitments	$	(24,394	)	$	(24,394	)	$	13,886	$	13,886	$	7,914	$	7,914	$	13,506	$	13,506

Of the total change in fair value of long-term loans and written loan commitments, $0.0 million and $0.7 million for the three months ended June 30, 2015 and 2014, respectively, and $0.5 million and $1.4 million for the nine months ended June 30, 2015 and 2014, respectively is attributable to changes in specific credit risk. The gains or losses attributable to changes in instrument-specific credit risk were determined based on an assessment of existing market conditions and credit quality of the underlying loan for the specific portfolio of loans.

11. Core Deposits and Other Intangibles

A summary of intangible assets subject to amortization is as follows (in thousands):

	Core Deposit Intangible			Brand Intangible			Customer Relationships Intangible			Total
As of June 30, 2015
Gross carrying amount	$	92,679		$	8,464		$	16,089		$	117,232
Accumulated amortization	(91,980		)	(3,995		)	(13,430		)	(109,405		)
Net intangible assets	$	699		$	4,469		$	2,659		$	7,827
As of September 30, 2014
Gross carrying amount	$	92,679		$	8,464		$	16,089		$	117,232
Accumulated amortization	(87,423		)	(3,572		)	(12,008		)	(103,003		)
Net intangible assets	$	5,256		$	4,892		$	4,081		$	14,229

Amortization expense of intangible assets was $1.8 million and $4.1 million for the three months ended June 30, 2015 and 2014, respectively and $6.4 million and $13.4 million for the nine months ended June 30, 2015 and 2014, respectively.

The estimated amortization expense of intangible assets assumes no activities, such as acquisitions, which would result in additional amortizable intangible assets. Estimated amortization expense of intangible assets in subsequent fiscal years is as follows (in thousands):

Remaining in 2015	$	709
2016	2,822
2017	1,097
2018	564
2019	564
2020 and thereafter	2,071
	$	7,827

12. Securities Sold Under Agreements to Repurchase

Securities sold under agreements to repurchase generally mature within one to four days from the transaction date. Securities underlying the agreements had an amortized cost of approximately $170.5 million and $190.6 million and fair value of approximately $170.5 million and $188.6 million at June 30, 2015 and September 30, 2014, respectively. The Company over-collateralizes the repurchase agreements at 102% of total funds borrowed to protect the purchaser from changes in market value.  Additionally, the Company utilizes held-in-custody procedures to ensure the securities sold under repurchase agreements are unencumbered. The

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GREAT WESTERN BANCORP, INC.

Notes to Consolidated Financial Statements (Unaudited)

following tables present the gross obligation by the class of collateral pledged and the remaining contractual maturity of the agreements at June 30, 2015 and September 30, 2014 (in thousands).

	June 30, 2015
	Remaining Contractual Maturity of the Agreements
	Overnight and Continuous		Up to 30 Days		30-90 Days		Greater than 90 Days		Total
Repurchase agreements
US Treasury and agency securities	$	52,402	$	—	$	—	$	—	$	52,402
Mortgage-backed securities	106,209		—		—		2,948		109,157
Total repurchase agreements	$	158,611	$	—	$	—	$	2,948	$	161,559

	September 30, 2014
	Remaining Contractual Maturity of the Agreements
	Overnight and Continuous		Up to 30 Days		30-90 Days		Greater than 90 Days		Total
Repurchase agreements
US Treasury and agency securities	$	8,469	$	—	$	—	$	—	$	8,469
Mortgage-backed securities	149,511		—		—		3,707		153,218
Total repurchase agreements	$	157,980	$	—	$	—	$	3,707	$	161,687

13. FHLB Advances, Related Party Notes Payable and Other Borrowings

FHLB advances, related party notes payable, and other borrowings consist of the following at June 30, 2015 and September 30, 2014 (in thousands):

	June 30, 2015		September 30, 2014
Subordinated capital note to NAB New York (a branch of NAB), due June 2018, interest paid quarterly based on LIBOR plus 205 basis points, unsecured	$	35,795	$	35,795
$10,000 revolving line of credit to NAB due on demand, interest paid monthly based on LIBOR plus 125 basis points, unsecured	5,500		5,500
Total related party notes payable	41,295		41,295
Notes payable to Federal Home Loan Bank (FHLB), interest rates from 0.21% to 3.66% and maturity dates from February 2016 to July 2023, collateralized by real estate loans and FHLB stock, with various call dates at the option of the FHLB	590,000		575,000
Other	520		94
Total FHLB advances and other borrowings	590,520		575,094
Total borrowings	$	631,815	$	616,389

As of June 30, 2015, based on its Federal Home Loan Bank stock holdings, the combined aggregate additional borrowing capacity of the Company with the Federal Home Loan Bank was $676.8 million.

Principal balances of loans pledged to the Federal Home Loan Bank to collateralize notes payable totaled $2,232.8 million and$2,145.5 million at June 30, 2015 and September 30, 2014, respectively.

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GREAT WESTERN BANCORP, INC.

Notes to Consolidated Financial Statements (Unaudited)

As of June 30, 2015, FHLB advances, related party notes payable and other borrowings are due or callable (whichever is earlier) in subsequent fiscal years as follows (in thousands):

Remaining in 2015	$	6,020
2016	90,000
2017	25,000
2018	60,795
2019	50,000
2020 and thereafter	400,000
	$	631,815

14. Income Taxes

The provision for income taxes charged to operations consists of the following for the three and nine months ended June 30, 2015 and 2014 (in thousands):

	Three Months Ended June 30,					Nine Months Ended June 30,
	2015		2014			2015		2014
Currently paid or payable
Federal	$	5,600	$	16,800		$	29,611	$	43,760
State	2,098		2,588			5,575		6,545
	7,698		19,388			35,186		50,305
Deferred tax (benefit) expense	7,173		(7,254		)	3,107		(8,743		)
Income tax expense	$	14,871	$	12,134		$	38,293	$	41,562

The income tax provision differs from the amount of income tax determined by applying the U.S. federal income tax rate to pretax income due to the following for the three and nine months ended June 30, 2015 and 2014 (in thousands):

	Three Months Ended June 30,						Nine Months Ended June 30,
	2015			2014			2015			2014
Computed “expected” tax expense (35%)	$	15,296		$	12,122		$	39,741		$	41,523
Increase (decrease) in income taxes resulting from:
Tax exempt interest income	(1,573		)	(1,263		)	(4,789		)	(3,539		)
State income taxes, net of federal benefit	1,363			1,682			3,623			4,254
Other	(215		)	(407		)	(282		)	(676		)
Actual tax expense	$	14,871		$	12,134		$	38,293		$	41,562

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GREAT WESTERN BANCORP, INC.

Notes to Consolidated Financial Statements (Unaudited)

Net deferred tax assets (liabilities) consist of the following components at June 30, 2015 and September 30, 2014 (in thousands):

	June 30, 2015			September 30, 2014
Deferred tax assets:
Allowance for loan losses	$	22,796		$	19,683
Compensation	705			329
Net operating loss carryforward	81			119
Securities available for sale	1,046			3,758
Other real estate owned	8,880			13,721
Core deposit intangible and other fair value adjustments	11,351			10,573
Excess tax basis of loans acquired over carrying value	4,630			9,595
Other	6,023			6,272
Total deferred tax assets	55,512			64,050
Deferred tax liabilities:
Goodwill and other intangibles	(11,995		)	(9,099		)
Premises and equipment	(3,131		)	(4,390		)
Excess carrying value of FDIC indemnification asset and clawback liability	(326		)	(4,280		)
Other	(1,176		)	(1,578		)
Total deferred tax liabilities	(16,628		)	(19,347		)
Net deferred tax assets	$	38,884		$	44,703

At June 30, 2015, the Company had income tax receivable of $1.4 million from the Internal Revenue Service and at September 30, 2014, had income tax payable of $4.9 million to National Americas Investment, Inc., which was subsequently dissolved (included in income tax payable).

Management has determined a valuation reserve is not required for the deferred tax assets because it is more likely than not these assets could be realized through carry back to taxable income in prior years, future reversals of existing taxable temporary differences, and future taxable income.

Uncertain tax positions were not significant at June 30, 2015 or September 30, 2014.

The Company is no longer subject to U.S. federal, state and local or non-U.S. income tax examinations by tax authorities for years before 2009. In July 2014, the IRS issued the final report on their examination of federal income tax returns for the periods ended September 30, 2010 and 2011.  The results of the examination did not have a material effect on our financial condition or results of operations.

15. Profit-Sharing Plan

The Company participates in a multiple employer 401(k) profit sharing plan (the Plan). All employees are eligible to participate, beginning with the first day of the month coincident with or immediately following the completion of one year of service and having reached the age of 21. In addition to employee contributions, the Company may contribute discretionary amounts for eligible participants. Contribution rates for participating employees must be equal. The Company contributed $1.1 million and $1.3 million to the Plan for the three months ended June 30, 2015 and 2014, respectively and $2.9 million and $2.5 million for the nine months ended June 30, 2015 and 2014, respectively.

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GREAT WESTERN BANCORP, INC.

Notes to Consolidated Financial Statements (Unaudited)

16. Stock-Based Compensation

On September 26, 2014, the Board of Directors adopted, and on October 10, 2014 NAB, at that time our controlling shareholder, approved the Great Western Bancorp, Inc. 2014 Omnibus Incentive Compensation Plan (the “2014 Plan”), the Great Western Bancorp, Inc. 2014 Non-Employee Director Plan (the “2014 Director Plan”), and the Great Western Bancorp, Inc. Executive Incentive Compensation Plan (the “Bonus Plan”), collectively ("the Plans"), which provide for the issuance of restricted share units and performance based share units to certain officers, employees and directors of the Company. The Plans were primarily established to enhance the Company’s ability to attract, retain and motivate employees. The Company’s Board of Directors, the Compensation Committee of the Board of Directors ("Compensation Committee"), or executive management upon delegation of the Compensation Committee has exclusive authority to select the employees and others, including directors, to receive the awards and to establish the terms and conditions of each award made pursuant to the Company’s stock-based compensation plans.

Stock units issued under the Company’s restricted and performance based stock plans may not be sold or otherwise transferred until the vesting period (typically 3 years) has been met and/or performance objectives have been obtained. During the vesting periods, participants do not have voting rights and dividends are accumulated until the time upon which the award vests. Upon specified events, as defined in the Plans, stock unit awards that have not vested and/or performance hurdles that have not been met will be forfeited.

Based on the substantive terms of each award, restricted and performance-based awards are classified as equity awards and accounted for under the Treasury method. The fair value of equity-classified awards is based on the market price of the stock on the measurement date and is amortized as compensation expense on a straight-line basis over the vesting or performance period.

Stock based compensation is recognized based on the number of awards that are ultimately expected to vest. Forfeitures are estimated based on historical turnover experience of qualified employees. For performance-based stock awards, an estimate is made of the number of shares expected to vest as a result of actual performance against the performance targets to determine the amount of compensation expense to be recognized. The estimate is reevaluated quarterly and total compensation expense is adjusted for any change in the current period. Stock-based compensation expense is included in salaries and employee benefits expense in the consolidated statements of comprehensive income. For the three months ended June 30, 2015 and 2014, stock compensation expense was $0.3 million and $0.0 million, respectively. For the nine months ended June 30, 2015 and 2014, stock compensation expense was $1.0 million and $0.0 million, respectively. Related income tax benefits recognized for the three months ended June 30, 2015 and 2014 were $0.1 million and $0.0 million, respectively and $0.4 million and $0.0 million for the nine months ended June 30, 2015 and 2014, respectively.

The following is a summary of the Plans’ restricted share and performance-based stock award activity as of June 30, 2015:

Restricted Shares	Common Shares		Weighted-Average Grant Date Fair Value
Restricted shares, October 1, 2014	—		$	—
Granted	81,419		18.18
Vested and issued	—		—
Forfeited	(556	)	18.00
Canceled	—		—
Restricted shares, June 30, 2015	80,863		$	18.18
Vested, but not issuable at June 30, 2015	12,221		$	18.00
Performance Shares
Performance shares, October 1, 2014	—		$	—
Granted	221,294		18.00
Vested and issued	—		—
Forfeited	(7,761	)	18.00
Canceled	—		—
Performance shares, June 30, 2015	213,533		$	18.00

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GREAT WESTERN BANCORP, INC.

Notes to Consolidated Financial Statements (Unaudited)

The number of performance shares granted is reflected in the above table at the 100% target performance level. The actual performance-based award payouts will vary based on the achievement of the pre-established targets and can range from 0% to 150% of the target amount. The outstanding number of performance shares reflected in the table represents the number of shares expected to be awarded based on estimated achievement of the goals as of year end. However, at June 30, 2015, the maximum number of performance-based shares that could be issued if performance is attained at 150% of target based on the grants made to date was approximately 320,300 shares.

As of June 30, 2015, there was $2.3 million of unrecognized compensation cost related to nonvested restricted stock awards expected to be recognized over a period of 2.25 years.

17. Fair Value of Financial Instruments

The Company measures, monitors and discloses certain of its assets and liabilities on a fair value basis. Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. The fair value guidance also establishes a fair value hierarchy that requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. The guidance describes three levels of inputs that may be used to measure fair value are as follows:

Level 1    Quoted prices in active markets for identical assets or liabilities

Level 2 Observable inputs other than Level 1 prices, such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities

Level 3 Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities

Level 1 inputs are considered to be the most transparent and reliable and Level 3 inputs are considered to be the least transparent and reliable. The Company assumes the use of the principal market to conduct a transaction of each particular asset or liability being measured and then considers the assumptions that market participants would use when pricing the asset or liability. Whenever possible, the Company first looks for quoted prices for identical assets or liabilities in active markets (Level 1 inputs) to value each asset or liability. However, when inputs from identical assets or liabilities on active markets are not available, the Company utilizes market observable data for similar assets and liabilities. The Company maximizes the use of observable inputs and limits the use of unobservable inputs to occasions when observable inputs are not available. The need to use unobservable inputs generally results from the lack of market liquidity of the actual financial instrument or of the underlying collateral. Although in some instances, third party price indications may be available, limited trading activity can challenge the observability of these quotations.

Assets and Liabilities Measured at Fair Value on a Recurring Basis

Following is a description of the valuation methodologies and inputs used for assets and liabilities measured at fair value on a recurring basis and recognized in the accompanying consolidated balance sheets, as well as the general classification of such assets and liabilities pursuant to the valuation hierarchy.

Securities Available for Sale

Where quoted market prices are available in an active market, securities are classified within Level 1 of the valuation hierarchy. Level 1 securities include U.S. Treasury securities and U.S. Agency securities. If quoted market prices are not available, then fair values are estimated by using pricing models, quoted prices of securities with similar characteristics, or discounted cash flows and classified as Level 2 securities. Level 2 securities include agency mortgage-backed, states and political subdivisions, corporate debt, and other securities. Where Level 1 or Level 2 inputs are not available, securities are classified within Level 3 of the hierarchy.

Interest Rate Swaps and Loans

Interest rate swaps are valued using the system used to value all traded securities and derivatives with swap counterparties using LIBOR rates. The fair value of loans accounted for under the fair value option represents the net carrying value of the loan, plus the equal and opposite amount of the value of the swap needed to hedge the interest rate risk and an adjustment for credit risk based on

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GREAT WESTERN BANCORP, INC.

Notes to Consolidated Financial Statements (Unaudited)

our assessment of existing market conditions for the specific portfolio of loans. This is used due to the strict prepayment penalties put in the loan terms to cover the cost of exiting the hedge of the loans in the case of early prepayment or termination. The adjustment for credit risk on loans accounted for under the fair value option is not significant to the overall fair value of the loans. The fair values estimated by swap counterparties use interest rates that are observable or that can be corroborated by observable market data and, therefore, are classified within Level 2 of the valuation hierarchy. The Company is required to post cash collateral to swap counterparties for interest rate derivative contracts that are in a liability position, thus a credit risk adjustment on interest rate swaps is not warranted.

The following table presents the fair value measurements of assets and liabilities recognized in the accompanying consolidated balance sheets measured at fair value on a recurring basis and the level within the fair value hierarchy in which the fair value measurements fall at June 30, 2015 and September 30, 2014 (in thousands):

	Fair Value		Level 1		Level 2		Level 3
As of June 30, 2015
U.S. Treasury securities	$	303,132	$	303,132	$	—	$	—
U.S. Agency securities	74,375		74,375		—		—
Mortgage-backed securities	1,025,026		—		1,025,026		—
States and political subdivision securities	1,864		—		30		1,834
Corporate debt securities	5,030		—		5,030		—
Other	1,048		—		1,048		—
Securities available for sale	$	1,410,475	$	377,507	$	1,031,134	$	1,834
Derivatives-assets	$	1	$	—	$	1	$	—
Derivatives-liabilities	24,426		—		24,426		—
Fair value loans and written loan commitments	1,063,665		—		1,063,665		—
	Fair Value		Level 1		Level 2		Level 3
As of September 30, 2014
U.S. Treasury securities	$	222,725	$	222,725	$	—	$	—
U.S. Agency securities	—		—		—		—
Mortgage-backed securities	1,103,415		—		1,103,415		—
States and political subdivision securities	2,189		—		160		2,029
Corporate debt securities	11,873		—		11,873		—
Other	1,040		—		1,040		—
Securities available for sale	$	1,341,242	$	222,725	$	1,116,488	$	2,029
Derivatives-assets	$	19	$	—	$	19	$	—
Derivatives-liabilities	13,092		—		13,092		—
Fair value loans and written loan commitments	985,411		—		985,411		—

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GREAT WESTERN BANCORP, INC.

Notes to Consolidated Financial Statements (Unaudited)

The following table presents the changes in Level 3 financial instruments for the three months ended June 30, 2015 and 2014 (in thousands):

	Other Securities Available for Sale
Balance as of March 31, 2015	$	1,958
Principal paydown	(124		)
Balance as of June 30, 2015	$	1,834
Balance as of March 31, 2014	$	2,243
Principal paydown	—
Balance as of June 30, 2014	$	2,243

The following table presents the changes in Level 3 financial instruments for the nine months ended June 30, 2015 and 2014 (in thousands):

	Other Securities Available for Sale
Balance as of September 30, 2014	$	2,029
Principal paydown	(195		)
Balance as of June 30, 2015	$	1,834
Balance as of September 30, 2013	$	2,243
Principal paydown	—
Balance as of June 30, 2014	$	2,243

Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis

Following is a description of the valuation methodologies used for assets and liabilities measured at fair value on a nonrecurring basis and recognized in the accompanying consolidated balance sheets, as well as the general classification of such assets and liabilities pursuant to the valuation hierarchy.

Impaired Loans (Collateral Dependent)

Loans for which it is probable that the Company will not collect all principal and interest due according to contractual terms are measured for impairment. Allowable methods for estimating fair value include using the fair value of the collateral for collateral dependent loans or, where a loan is determined not to be collateral dependent, using the discounted cash flow method.

If the impaired loan is identified as collateral dependent, then the fair value method of measuring the amount of the impairment is utilized. This method requires obtaining a current independent appraisal of the collateral and applying a discount factor, if necessary, to the appraised value and including costs to sell. Because many of these inputs are not observable, the measurements are classified as Level 3.

Other Real Estate Owned (OREO)

Other real estate owned consists of loan collateral that has been repossessed through foreclosure. This collateral is comprised of commercial and residential real estate. OREO is recorded initially at fair value of the collateral less estimated selling costs. Subsequent to foreclosure, valuations are updated periodically, and the assets may be marked down further to fair value less selling costs, reflecting a valuation allowance. Fair value measurements may be based upon appraisals, third-party price opinions, or internally developed pricing methods. These measurements are classified as Level 3.

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GREAT WESTERN BANCORP, INC.

Notes to Consolidated Financial Statements (Unaudited)

Mortgage Loans Held for Sale

Fair value of mortgage loans held for sale is based on either quoted prices for the same or similar loans, or values obtained from third parties, or are estimated for portfolios of loans with similar financial characteristics and are therefore considered a Level 2 valuation.

The following tables present the fair value measurement of assets and liabilities measured at fair value on a nonrecurring basis and the level within the fair value hierarchy in which the fair value measurements fall at June 30, 2015 and September 30, 2014 (in thousands):

	Fair Value		Level 1		Level 2		Level 3
As of June 30, 2015
Other real estate owned	$	13,051	$	—	$	—	$	13,051
Impaired loans	166,841		—		—		166,841
Loans held for sale, at lower of cost or fair value	9,173		—		9,173		—
As of September 30, 2014
Other real estate owned	$	36,879	$	—	$	—	$	36,879
Impaired loans	111,265		—		—		111,265
Loans held for sale, at lower of cost or fair value	10,381		—		10,381		—

The valuation techniques and significant unobservable inputs used to measure Level 3 fair value measurements at June 30, 2015 were as follows (in thousands):

Financial Instrument	Fair Value of Assets / (Liabilities) at June 30, 2015		Valuation Technique(s)	Unobservable Input	Range	Weighted Average
Other real estate owned	$	13,051	Appraisal value	Property specific adjustment	N/A	N/A
Impaired loans	$	166,841	Appraisal value	Property specific adjustment	N/A	N/A

Disclosures about Fair Value of Financial Instruments

For financial instruments that have quoted market prices, those quotes are used to determine fair value. Financial instruments that have no defined maturity, have a remaining maturity of 180 days or less, or reprice frequently to a market rate are assumed to have a fair value that approximates carrying value, after taking into consideration any applicable credit risk. If no market quotes are available, financial instruments are valued by discounting the expected cash flows using an estimated current market interest rate for the financial instrument.

The short maturity of the Company’s assets and liabilities results in having a significant number of financial instruments whose fair value equals or closely approximates carrying value. Such financial instruments are reported in the following consolidated balance sheet categories: cash and due from banks, securities sold under agreements to repurchase, and accrued interest.

Fair value estimates are based on existing on and off-balance sheet financial instruments without attempting to estimate the value of anticipated future business and the value of assets and liabilities that are not considered financial instruments. Significant assets and liabilities that are not considered financial instruments include premises and equipment, deferred income taxes, goodwill, and core deposit and other intangibles. In addition, the tax ramifications related to the realization of unrealized gains and losses can have a significant effect on fair value estimates and have not been considered in the estimates.

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GREAT WESTERN BANCORP, INC.

Notes to Consolidated Financial Statements (Unaudited)

Off-balance sheet instruments (commitments to extend credit and standby letters of credit) are generally short-term and at variable rates. Therefore, both the carrying amount and the estimated fair value associated with these instruments are immaterial. Fair values for balance sheet instruments as of June 30, 2015 and September 30, 2014, are as follows (in thousands):

		June 30, 2015				September 30, 2014
	Level in Fair Value Hierarchy	Carrying Amount		Fair Value		Carrying Amount		Fair Value
Assets
Cash and due from banks	Level 1	$	187,171	$	187,171	$	256,639	$	256,639
Loans, net excluding fair valued loans and loans held for sale	Level 3	6,116,471		6,099,234		5,744,157		5,734,274
Accrued interest receivable	Level 2	39,528		39,528		42,609		42,609
Federal Home Loan Bank stock	Level 2	36,287		36,287		35,922		35,922
Liabilities
Deposits	Level 3	$	7,357,688	$	7,384,060	$	7,052,180	$	7,057,591
FHLB advances, related party notes payable, and other borrowings	Level 2	631,815		624,431		616,389		604,615
Securities sold under repurchase agreements	Level 2	161,559		161,559		161,687		161,687
Accrued interest payable	Level 2	4,211		4,211		5,273		5,273
Subordinated debentures	Level 2	56,083		56,071		56,083		56,084

The following methods and assumptions were used in estimating the fair value of financial instruments that were not previously disclosed:

Cash and cash due from banks: Due to the short term nature of cash and cash equivalents, the estimated fair value is equal to the carrying value and they are categorized as a Level 1 fair value measurement.

Loans, net excluding fair valued loans and loans held for sale: The fair value of the loan portfolio is estimated using observable inputs including estimated cash flows, and discount rates based on interest rates currently being offered for loans with similar terms, to borrowers of similar credit quality. Loans held for investment are categorized as a Level 3 fair value measurement.

Accrued interest receivable: Due to the nature of accrued interest receivable, the estimated fair value is equal to the carrying value and they are categorized as a Level 2 fair value measurement.

Federal Home Loan Bank stock: The carrying amount of FHLB stock approximates its fair value as it can only be redeemed with the FHLB at par value. Federal Home Loan Bank stock has been categorized as a Level 2 fair value measurement.

Deposits: The estimated fair value of deposits with no stated maturity, such as non-interest bearing demand deposits, savings, NOW, and money market accounts, is equal to the amount payable on demand. The fair value of interest-bearing time deposits is based on the discounted value of contractual cash flows of such deposits, taking into account the option for early withdrawal. The discount rate is estimated using the rates offered by the Company, at the respective measurement dates, for deposits of similar maturities. Deposits have been categorized as a Level 3 fair value measurement.

FHLB advances, related party notes payable, and other borrowings: The fair value of FHLB advances, related party notes payable, and other borrowings is estimated using discounted cash flow analysis, based on current incremental borrowing rates for similar types of borrowing arrangements. In the absence of a reasonably precise methodology to determine the fair value of the credit agreement, carrying value has been used to represent fair value. FHLB advances, related party notes payable, and other borrowings have been categorized as a Level 2 fair value measurement.

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GREAT WESTERN BANCORP, INC.

Notes to Consolidated Financial Statements (Unaudited)

Securities sold under repurchase agreements: The Company’s repurchase agreements are overnight transactions that mature the day after the transaction, and as a result of this short-term nature, the estimated fair value equals the carrying value. Securities sold under repurchase agreements have been categorized as a Level 2 fair value measurement.

Accrued interest payable: Due to the nature of accrued interest payable, the estimated fair value is equal to the carrying value and they are categorized as a Level 2 fair value measurement.

Subordinated Debentures: The fair value of subordinated debentures is estimated using discounted cash flow analysis, based on current incremental debt rates. Subordinated debentures have been categorized as a Level 2 fair value measurement.

18. Earnings per Share

Basic earnings per common share is calculated by dividing net income available to common shareholders by the weighted average number of common shares outstanding during the period, excluding outstanding non-vested restricted stock awards. Diluted earnings per common share is calculated by dividing net income available to common shareholders by the weighted average number of common shares outstanding determined for the basic earnings per share calculation plus the dilutive effect of stock compensation using the treasury stock method.

The following information was used in the computation of basic earnings per share (EPS) for the three and nine months ended June 30, 2015 and 2014 (in thousands except share data).

	Three Months Ended June 30,				Nine Months Ended June 30,
	2015		2014		2015		2014
Net income	$	28,832	$	22,502	$	75,253	$	77,077
Weighted average common shares outstanding	57,898,335		57,886,114		57,897,484		57,886,114
Dilutive effect of stock based compensation	60,867		—		31,704		—
Weighted average common shares outstanding for diluted earnings per share calculation	57,959,202		57,886,114		57,929,188		57,886,114
Basic earnings per share	$	0.50	$	0.39	$	1.30	$	1.33
Diluted earnings per share	$	0.50	$	0.39	$	1.30	$	1.33

The Company had 60,543 and 0 shares of unvested performance stock as of June 30, 2015 and 2014, respectively, that were not included in the computation of diluted earnings per common share because performance conditions for vesting had not been met. The Company had 1,244 and 0 shares of anti-dilutive stock awards outstanding as of June 30, 2015 and 2014, respectively.

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

The historical consolidated financial data discussed below reflects our historical results of operations and financial condition and should be read in conjunction with our financial statements and related notes thereto presented elsewhere in this Quarterly Report on Form 10-Q and in our Annual Report on Form 10-K for the fiscal year ended September 30, 2014, previously filed with the SEC. In addition to historical financial data, this discussion includes certain forward-looking statements regarding events and trends that may affect our future results. Such statements are subject to risks and uncertainties that could cause our actual results to differ materially. See “Cautionary Note Regarding Forward-Looking Statements.” For a more complete discussion of the factors that could affect our future results, see “Item 1A. Risk Factors” in our Annual Report on Form 10-K for the fiscal year ended September 30, 2014.

Any discrepancies included in this filing between totals and the sums of percentages and dollar amounts presented, or between rounded dollar amounts, are due to rounding.

Unless otherwise noted, references to "the current period" or "the current quarter" refer to the fiscal quarter ended June 30, 2015 and references to "the comparable period" or "the comparable quarter" refer to the fiscal quarter ended June 30, 2014.

Tax Equivalent Presentation

All references to net interest income, net interest margin, interest income on loans other than loans acquired with deteriorated credit quality, yield on loans acquired with deteriorated credit quality and the related non-GAAP adjusted measure of each item are presented on a fully-tax equivalent basis unless otherwise noted.

Overview

We are a full-service regional bank holding company focused on relationship-based business and agribusiness banking. We serve our customers through 158 branches in attractive markets in seven states: South Dakota, Iowa, Nebraska, Colorado, Arizona, Kansas and Missouri. During the nine months ended June 30, 2015, we have consolidated our branch network by a net of 5 branches. We do not believe these reductions will have a material impact on our revenue in future periods and expect that we will achieve some cost savings in future periods as a result of the closures.

We were established more than 70 years ago and have achieved strong market positions by developing and maintaining extensive local relationships in the communities we serve. By leveraging our business and agribusiness focus, presence in attractive markets, highly efficient operating model and robust approach to risk management, we have achieved significant and profitable growth—both organically and through disciplined acquisitions. We provide financial results based on a fiscal year ending September 30 as a single reportable segment.

Net income was $28.8 million for the third quarter of fiscal year 2015, an increase of $6.3 million, or 28%, compared to the third quarter of fiscal year 2014. The increase was partially attributable to a $1.6 million nonrecurring net gain realized on the sale of a closed branch location net of other branch closure related costs. In addition to the nonrecurring net gain, net interest income and nonintrest expense each improved compared to the same quarter in fiscal year 2014, partially offset by higher provision for loan losses. Fiscal year-to-date net income was $75.3 million, compared to $77.1 million for the same period of fiscal year 2014.

Our efficiency ratio remained strong during the quarter at 46.4%, lower than the previous quarter due to an increase in total revenue and a decline in noninterest expense. Our efficiency ratio is 48.8% on a fiscal year-to-date basis. For more information on our efficiency ratio, including a reconciliation to the most directly comparable GAAP financial measure, see "—Non-GAAP Financial Measures" below.

Net interest margin was 3.95%, 3.89% and 4.03%, respectively, for the quarters ended June 30, 2015, March 31,2015 and June 30, 2014 and 3.92% and 3.99%, respectively, for the nine months ended June 30, 2015 and June 30, 2014. Adjusted net interest margin, which reflects the realized gain (loss) on interest rate swaps, was 3.70%, 3.64% and 3.80%, respectively, and 3.67% and 3.77%, respectively, for the same periods. We believe our adjusted net interest margin is more representative of our underlying performance and is the measure we use internally to evaluate our results. Net interest margin and adjusted net interest margin declined compared to the third quarter of fiscal year 2014 primarily due to reduced asset yields. Pricing on new loans continued to be impacted

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by competitive pressures in the market and the continued near-zero benchmark interest rate environment, while investment portfolio yields have also declined. These reductions in asset yields were partially offset by a 5 basis point reduction in the cost of deposits over the same period, driven in part by a continued favorable change in deposit mix. For more information on our adjusted net interest margin, including a reconciliation to the most directly comparable GAAP financial measure, see "—Non-GAAP Financial Measures" below.

Net income for the quarter represents earnings per common share of $0.50, compared to $0.39 in the comparable period, and is $1.30 fiscal year-to-date compared to $1.33 for the same period in fiscal year 2014. On July 27, 2015, our board of directors declared a dividend of $0.12 per common share payable on August 28, 2015 to owners of record as of the close of business on August 14, 2015.

During the quarter we experienced loan growth while deposits contracted. Total loans increased $172.8 million during the quarter from $6.79 billion at September 30, 2014 to $7.25 billion at June 30, 2015, a fiscal year-to-date increase of $457.8 million or 6.7%. Year-to-date loan growth remains balanced across the lending components of the portfolio including commercial non-real estate, commercial real estate, agriculture and residential real estate. The overall loan portfolio remains well diversified across a number of segments, industries and geographies. Deposits increased from $7.05 billion at September 30, 2014 to $7.36 billion at June 30, 2015, an increase of $305.5 million or 4.3%. However, deposits decreased $130.0 million during the quarter. The decrease during the quarter was expected due to seasonal outflows driven by our customers' tax needs and other factors.

At June 30, 2015, nonperforming loans were $68.1 million, with $8.3 million of the balance covered by FDIC loss-sharing arrangements. Total nonperforming loans decreased by $6.2 million, or 8%, during the quarter, while non-covered nonaccrual loans increased by $13.3 million, or 29%. The majority of the increase in non-covered nonaccrual loans was driven by loans whose loss-sharing coverage expired during the quarter where management has a workout plan in place and does not expect to incur credit losses in the future. OREO balances declined by $21.6 million, or 50%, during the quarter, driven primarily by the liquidation of one longstanding problem asset.

Loans on "Watch" status were $322.3 million as of June 30, 2015, a decrease of $62.2 million, or 16%, during the quarter. The majority of the decrease occurred in the commercial non-real estate segment, with smaller decreases in the commercial real estate and agriculture segments.

Excluding charge-offs on acquired loans subject to purchase accounting fair value adjustments, net charge-offs for the third quarter of fiscal year 2015 were $0.9 million, or 0.05% of average loans on an annualized basis, bringing net charge-offs for the first nine months of fiscal year 2015 to $9.0 million or 0.17% of average loans on an annualized basis. For the comparable periods in fiscal year 2014, net charge-offs were $1.6 million, or 0.10% of total loans on an annualized basis, and $6.8 million, or 0.14% of loans on an annualized basis, respectively.

Our capital position is strong and stable, with Tier 1 capital, total capital and Tier 1 leverage ratios of 11.5%, 12.5% and 9.4%, respectively, at June 30, 2015, compared to 11.6%, 12.6% and 9.3%, respectively, at March 31, 2015. In addition, our Common Equity Tier 1 ratio was 10.8% at June 30, 2015 and March 31, 2015. Our tangible common equity to tangible assets ratio was 8.6% at June 30, 2015, compared to 8.4% at March 31, 2015. For more information on our tangible common equity to tangible assets ratio, including a reconciliation to the most directly comparable GAAP financial measure, see "—Non-GAAP Financial Measures" below.

Until our initial public offering in October 2014 we were a wholly owned indirect subsidiary of NAB, and our results have been part of NAB’s consolidated business operations since NAB acquired us in 2008. NAB is a large financial institution incorporated in Australia and listed on the Australian Securities Exchange with operations in Australia, New Zealand, the United Kingdom, the United States and parts of Asia. Historically, NAB and its affiliates have provided financial and administrative support to us. In connection with our initial public offering, we and NAB entered into certain agreements to provide a framework for our relationship, during the period between our initial public offering and NAB's sale of its remaining interest in our shares of common stock and termination of control over us. These agreements included a Stockholder Agreement that governed NAB’s rights as a controlling stockholder and a Transitional Services Agreement pursuant to which NAB agreed to continue to provide us with certain services for a transition period. Most of NAB's rights and obligations under these agreements, including NAB's governance and consent rights with respect to our business and NAB's obligation to provide certain back-office and support services to us, terminated in connection with NAB's sale of its remaining interest in our common stock on July 31, 2015. Our costs associated with these services have not been significant to date and we do not expect our costs associated with these services to be significant in the future.

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Key Factors Affecting Our Business and Financial Statements

As discussed in our Annual Report on Form 10-K for the fiscal year ended September 30, 2014, our business and results of operations are impacted by several key factors, including economic conditions, interest rates, asset quality and loss-sharing arrangements, banking laws and regulations, competition, our operational efficiency, goodwill and amortization of other intangible assets and accounting for loans and interest rate swaps at fair value.  There have been no material changes to these factors except as otherwise supplemented below and within our Quarterly Reports on Form 10-Q for the three and six months ended December 31, 2014 and March 31, 2015, respectively.

At June 30, 2015, we had $697.8 million of goodwill, $622.4 million of which relates to the acquisition of us by NAB in 2008 and was pushed down to our balance sheet, with the balance relating to subsequent acquisitions completed by us. Under relevant accounting guidance, we are required to review goodwill for impairment annually, or more frequently if events or circumstances indicate that the fair value of our business may be less than its carrying value. We determine impairment by comparing the implied fair value of the goodwill with the carrying amount of that goodwill. If the carrying amount of the goodwill exceeds the implied fair value of that goodwill, evidence of impairment is present and we will measure the impairment and potentially record an impairment loss in the amount of the excess of the carrying amount over the fair value. The valuation of goodwill is dependent on forward-looking expectations related to nationwide and local economic conditions and our associated financial performance. A significant decline in our expected future cash flows, a material change in interest rates, a significant adverse change in the business climate, slower growth rates, or a significant or sustained decline in the price of our common stock may necessitate taking charges in the future related to the impairment of our goodwill and other intangible assets. We cannot provide assurance that we will not be required to record any charges for impairment in the future. Our recognition of any such impairment could adversely affect our business and future financial results. See “Item 1A. Risk Factors—Risks Related to Our Business—The value of our goodwill and other intangible assets may decline in the future” in our Annual Report on Form 10-K.

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Results of Operations—Three and NineMonth Periods EndedJune 30, 2015and2014

Overview

The following table highlights certain key financial and performance information for the periods ended June 30, 2015 and 2014:

	For the three months ended June 30,
	2015			2014
	(dollars in thousands, except per share amounts)
Operating Data:
Interest and dividend income (FTE)	$	93,582		$	89,078
Interest expense	7,340			7,778
Noninterest income	10,005			10,314
Noninterest expense	46,430			54,278
Provision for loan losses	4,410			1,500
Net income	28,832			22,502
Earnings per common share	$	0.50		$	0.39
Performance Ratios:
Net interest margin (FTE)	3.95		%	4.03		%
Adjusted net interest margin (FTE)(1)	3.70		%	3.80		%
Return on average total assets	1.18		%	0.98		%
Return on average common equity	7.83		%	6.24		%
Return on average tangible common equity(1)	15.8		%	14.2		%
Efficiency ratio(1)	46.4		%	54.8		%
(1) This is a non-GAAP financial measure we believe is helpful to interpreting our financial results. For more information on this non-GAAP financial measure, including a reconciliation to the most directly comparable GAAP financial measure, see "—Non-GAAP Financial Measures" below.

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	For the nine months ended June 30,
	2015			2014
	(dollars in thousands, except per share amounts)
Operating Data:
Interest and dividend income (FTE)	$	275,458		$	264,874
Interest expense	22,588			24,337
Noninterest income	24,841			31,280
Noninterest expense	141,959			151,904
Provision (recovery) for loan losses	17,408			(2,065		)
Net income	75,253			77,077
Earnings per common share	$	1.30		$	1.33
Performance Ratios:
Net interest margin (FTE)	3.92		%	3.99		%
Adjusted net interest margin (FTE)(1)	3.67		%	3.77		%
Return on average total assets	1.04		%	1.12		%
Return on average common equity	6.91		%	7.30		%
Return on average tangible common equity(1)	14.5		%	17.1		%
Efficiency ratio(1)	48.8		%	50.9		%
(1) This is a non-GAAP financial measure we believe is helpful to interpreting our financial results. For more information on this non-GAAP financial measure, including a reconciliation to the most directly comparable GAAP financial measure, see "—Non-GAAP Financial Measures" below.

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Net Interest Income

The following tables present net interest income, net interest margin and adjusted net interest margin for the three and nine month periods ended June 30, 2015 and 2014:

	For the three months ended June 30,
	2015			2014
	(dollars in thousands)
Net interest income:
Total interest and dividend income (FTE)	$	93,582		$	89,078
Less: Total interest expense	7,340			7,778
Net interest income (FTE)	86,242			81,300
Less: Provision for loan losses	4,410			1,500
Net interest income after provision for loan losses (FTE)	$	81,832		$	79,800
Net interest margin (FTE) and adjusted net interest margin (FTE):
Average interest-earning assets	$	8,756,244		$	8,098,052
Average interest-bearing liabilities	$	8,257,602		$	7,737,427
Net interest margin (FTE)	3.95		%	4.03		%
Adjusted net interest margin (FTE)(1)	3.70		%	3.80		%
1 This is a non-GAAP financial measure we believe is helpful to interpreting our financial results. For more information on this non-GAAP financial measure, including a reconciliation to the most directly comparable GAAP financial measure, see "—Non-GAAP Financial Measures" below.

	For the nine months ended June 30,
	2015			2014
	(dollars in thousands)
Net interest income:
Total interest and dividend income (FTE)	$	275,458		$	264,874
Less: Total interest expense	22,588			24,337
Net interest income (FTE)	252,870			240,537
Less: Provision (recovery) for loan losses	17,408			(2,065		)
Net interest income after provision (recovery) for loan losses (FTE)	$	235,462		$	242,602
Net interest margin (FTE) and adjusted net interest margin (FTE):
Average interest-earning assets	$	8,624,469		$	8,067,544
Average interest-bearing liabilities	$	8,173,845		$	7,734,558
Net interest margin (FTE)	3.92		%	3.99		%
Adjusted net interest margin (FTE) (1)	3.67		%	3.77		%
1 This is a non-GAAP financial measure we believe is helpful to interpreting our financial results. For more information on this non-GAAP financial measure, including a reconciliation to the most directly comparable GAAP financial measure, see "—Non-GAAP Financial Measures" below.

Net interest income was $86.2 million for the third quarter of fiscal year 2015 compared to $81.3 million for the same quarter in fiscal year 2014, an increase of 6%. The increase was driven by higher interest income on loans, attributable to loan growth over the previous year, more gross income related to the portion of the portfolio acquired with deteriorated credit quality and lower deposit interest expense, partially offset by lower interest income on the investment portfolio. Net interest margin was 3.95% for the third

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quarter of fiscal year 2015, compared with 4.03% for the same period in fiscal year 2014. Adjusted net interest margin was 3.70% and 3.80%, respectively, over the same periods. The lower net interest margin and adjusted net interest margin were attributable to lower asset yields, partially offset by a reduction in cost of deposits. For more information on our adjusted net interest margin and adjusted net interest income, including a reconciliation of each to the most directly comparable GAAP financial measure, see "—Non-GAAP Financial Measures" below.

Net interest income was $252.9 million for the first nine months of fiscal year 2015, compared to $240.5 million for the same period in fiscal year 2014, an increase of $12.3 million. Similar to the quarterly period, the increase was driven by higher interest income on loans and lower deposit interest expense, partially offset by lower investment portfolio interest income. Net interest margin was 3.92% for the first nine months of fiscal year 2015, compared to 3.99% for the same period in fiscal year 2014, while adjusted net interest margin was 3.67% and 3.77%, respectively, for the same periods. The decreases were driven by lower asset yields and a higher average cash balance, due in part to the impact of an affiliate of NAB holding our initial public offering proceeds on deposit in our bank for a portion of fiscal year 2015 and strong deposit growth in the first two quarters, partially offset by lower cost of deposits.

The following table presents the distribution of average assets, liabilities and equity, interest income and resulting yields on average interest-earning assets, and interest expense and rates on average interest-bearing liabilities for the current and comparable three and nine month periods. Loans on nonaccrual status, totaling $68.1 million at June 30, 2015 and $80.8 million at June 30, 2014, are included in the average balances below. Any interest that had accrued as of the date of nonaccrual is immediately reversed as a reduction to interest income, while any interest subsequently recovered is recorded in the period of recovery. Tax-exempt loans and securities, totaling $556.8 million at June 30, 2015 and $412.5 million at June 30, 2014, are typically entered at lower interest rate arrangements than comparable non-exempt loans and securities. The amount of interest income reflected below has been adjusted to include the amount of tax benefit realized in the period and as such is presented on a fully-tax equivalent basis, the calculation of which is outlined in the discussion of non-GAAP items later in this section. Loans acquired with deteriorated credit quality represent loans accounted for in accordance with ASC 310-30 Accounting for Purchased Loans that were credit impaired at the time we acquired them. Loans other than loans acquired with deteriorated credit quality represent loans we have originated and loans we have acquired that were not credit impaired at the time we acquired them.

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	For the three months ended
	June 30, 2015						June 30, 2014
	Average Balance		Interest (FTE)		Yield / Cost1		Average Balance		Interest (FTE)		Yield / Cost1
Assets
Cash and due from banks	$	198,517	$	155	0.31	%	$	119,970	$	99	0.33	%
Investment securities	1,439,690		6,483		1.81	%	1,428,407		6,982		1.96	%
Loans, other than loans acquired with deteriorated credit quality, net (2)	6,995,340		84,798		4.86	%	6,362,850		80,445		5.07	%
Loans acquired with deteriorated credit quality, net	122,697		2,146		7.02	%	186,825		1,552		3.33	%
Loans, net	7,118,037		86,944		4.90	%	6,549,675		81,997		5.02	%
Total interest-earning assets	8,756,244		93,582		4.29	%	8,098,052		89,078		4.41	%
Noninterest-earning assets	1,065,347						1,143,845
Total assets	$	9,821,591	$	93,582	3.82	%	$	9,241,897	$	89,078	3.87	%
Liabilities and Stockholders' Equity
Noninterest-bearing deposits	$	1,312,859					$	1,227,420
NOW, MMDA and savings deposits	4,665,101		$	3,272	0.28	%	4,048,428		$	2,376	0.24	%
CDs	1,499,667		2,504		0.67	%	1,860,094		3,943		0.85	%
Total deposits	7,477,627		5,776		0.31	%	7,135,942		6,319		0.36	%
Securities sold under agreements to repurchase	158,758		134		0.34	%	192,579		153		0.32	%
FHLB advances and other borrowings	523,839		867		0.66	%	311,528		751		0.97	%
Related party notes payable	41,295		233		2.26	%	41,295		230		2.23	%
Subordinated debentures and other	56,083		330		2.36	%	56,083		325		2.32	%
Total borrowings	779,975		1,564		0.80	%	601,485		1,459		0.97	%
Total interest-bearing liabilities	8,257,602		$	7,340	0.36	%	7,737,427		$	7,778	0.40	%
Noninterest-bearing liabilities	87,433						58,657
Stockholders' equity	1,476,556						1,445,813
Total liabilities and stockholders' equity	$	9,821,591					$	9,241,897
Net interest spread					3.46	%					3.47	%
Net interest income and net interest margin (FTE)			$	86,242	3.95	%			$	81,300	4.03	%
Less: Tax equivalent adjustment			$	1,704					$	1,200
Net interest income and net interest margin - ties to Consolidated Statements of Comprehensive Income			$	84,538	3.87	%			$	80,100	3.97	%
1 Annualized for all partial-year periods.
2 Interest income includes $0.1 million and $0.5 million for the third quarter of fiscal year 2015 and 2014, respectively, resulting from accretion of purchase accounting discount associated with acquired loans.

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	For the nine months ended
	June 30, 2015						June 30, 2014
	Average Balance		Interest (FTE)		Yield / Cost1		Average Balance		Interest (FTE)		Yield / Cost1
Assets
Cash and due from banks	$	302,449	$	599	0.26	%	$	197,450	$	400	0.27	%
Investment securities	1,370,129		18,083		1.76	%	1,427,707		21,002		1.97	%
Loans, other than loans acquired with deteriorated credit quality, net(2)	6,816,785		249,581		4.90	%	6,239,191		239,146		5.12	%
Loans acquired with deteriorated credit quality, net	135,106		7,195		7.12	%	203,196		4,326		2.85	%
Loans, net	6,951,891		256,776		4.94	%	6,442,387		243,472		5.05	%
Total interest-earning assets	8,624,469		275,458		4.27	%	8,067,544		264,874		4.39	%
Noninterest-earning assets	1,089,322						1,155,291
Total assets	$	9,713,791	$	275,458	3.79	%	$	9,222,835	$	264,874	3.84	%
Liabilities and Stockholders' Equity
Noninterest-bearing deposits	$	1,362,551					$	1,232,354
NOW, MMDA and savings deposits	4,420,859		$	9,190	0.28	%	3,943,543		$	6,942	0.24	%
CDs	1,583,765		8,585		0.72	%	1,952,901		12,687		0.87	%
Total deposits	7,367,175		17,775		0.32	%	7,128,798		19,629		0.37	%
Securities sold under agreements to repurchase	169,660		430		0.34	%	196,371		442		0.30	%
FHLB advances and other borrowings	539,632		2,706		0.67	%	312,011		2,591		1.11	%
Related party notes payable	41,295		692		2.24	%	41,295		690		2.23	%
Subordinated debentures and other	56,083		985		2.35	%	56,083		985		2.35	%
Total borrowings	806,670		4,813		0.80	%	605,760		4,708		1.04	%
Total interest-bearing liabilities	8,173,845		$	22,588	0.37	%	7,734,558		$	24,337	0.42	%
Noninterest-bearing liabilities	83,772						77,140
Stockholders' equity	1,456,174						1,411,137
Total liabilities and stockholders' equity	$	9,713,791					$	9,222,835
Net interest spread					3.42	%					3.42	%
Net interest income and net interest margin (FTE)			$	252,870	3.92	%			$	240,537	3.99	%
Less: Tax equivalent adjustment			$	4,798					$	3,339
Net interest income and net interest margin - ties to Consolidated Statements of Comprehensive Income			$	248,072	3.85	%			$	237,198	3.93	%
1 Annualized for all partial-year periods.
2 Interest income includes $0.2 million and $1.7 million for the first nine months of fiscal year 2015 and 2014, respectively, resulting from accretion of purchase accounting discount associated with acquired loans.

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Interest and Dividend Income

The following tables present interest and dividend income for the three and nine month periods ended June 30, 2015 and 2014:

	Three months ended June 30,
	2015		2014
	(dollars in thousands)
Interest and dividend income:
Loans	$	85,240	$	80,797
Taxable securities	5,984		6,598
Nontaxable securities	10		33
Dividends on securities	489		351
Federal funds sold and other	155		99
Total interest and dividend income (GAAP)	91,878		87,878
Tax equivalent adjustment	1,704		1,200
Total interest and dividend income (FTE)	$	93,582	$	89,078

	Nine months ended June 30,
	2015		2014
	(dollars in thousands)
Interest and dividend income:
Loans	$	251,978	$	240,133
Taxable securities	17,050		20,190
Nontaxable securities	36		61
Dividends on securities	997		751
Federal funds sold and other	599		400
Total interest and dividend income (GAAP)	270,660		261,535
Tax equivalent adjustment	4,798		3,339
Total interest and dividend income (FTE)	$	275,458	$	264,874

Total interest and dividend income consists primarily of interest income on loans and interest and dividend income on our investment portfolio. Total interest and dividend income was $93.6 million for the third quarter of fiscal year 2015, compared to $89.1 million for the same period of fiscal year 2014, an increase of 5%. Total interest and dividend income was $275.5 million for the first nine months of fiscal year 2015, compared to $264.9 million for the same period of fiscal year 2014, an increase of 4%. Significant components of interest and dividend income are described in further detail below.

Loans. Interest income on all loans increased to $86.9 million in third quarter of fiscal year 2015 from $82.0 million in the third quarter of fiscal year 2014, an increase of 6% between the two periods. The growth was driven primarily by higher average loan balances driven by organic loan origination over the course of the year, partially offset by lower overall loan yields as a result of pricing pressure on new and renewed loans. Interest income on loans acquired with deteriorated credit quality increased $0.6 million between the two periods, primarily driven by lower amortization of the indemnification assets related to these loans in the current period as those assets related to the commercial FDIC loss-sharing arrangement were amortized prior to the expiration of the arrangement.

Interest income on all loans increased to $256.8 million in the first nine months of fiscal year 2015 from $243.5 million in the same period of fiscal year 2014, an increase of 5%. Similar to the quarterly period, the growth was driven by higher average loan

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balances due to organic growth, partially offset by lower overall loan yields. Interest income on loans acquired with deteriorated credit quality increased $2.9 million between the two periods, again primarily driven by lower amortization of the indemnification asset related to these loans in the current period.

Our yield on loans is affected by market interest rates, the level of adjustable-rate loan indices, interest rate floors and caps, customer repayment activity, the level of loans held for sale, portfolio mix, and the level of nonaccrual loans. The average tax equivalent yield on loans, other than loans acquired with deteriorated credit quality, was 4.86% for the third quarter of fiscal year 2015, a decrease of 21 basis points compared to 5.07% for the same period in fiscal year 2014. Adjusted for the current realized gain (loss) on derivatives we use to manage interest rate risk on certain of our loans at fair value, which we believe represents the underlying economics of the transactions, the adjusted yield on loans, other than loans acquired with deteriorated credit quality, was 4.55% for the current quarter, a 23 basis point decrease compared to the third quarter of fiscal year 2014. The average tax equivalent yield on loans, other than loans acquired with deteriorated credit quality, was 4.90% for the first nine months of fiscal year 2015, a decrease of 22 basis points compared to 5.12% for the same period in fiscal year 2014. Adjusted for the current realized gain (loss) on derivatives, the adjusted yield on loans, other than loans acquired with deteriorated credit quality, was 4.58% and 4.84%, respectively, for the same periods. These decreases continue to be attributable to the competitive interest rate environment for high quality commercial and agricultural credits across our footprint and a prolonged rate cycle with short-term rates at or near zero.

The average yield on loans acquired with deteriorated credit quality was 7.02% for the third quarter of fiscal year 2015, compared to 3.33% for the comparable period in fiscal year 2014 and 7.12% for the first nine months of fiscal year 2015 compared to 2.85% for the same period in fiscal year 2014. The yield on this portion of the portfolio is heavily impacted by the amortization rates for the related FDIC indemnification asset, which is recorded through interest income. The amortization rate was much higher in fiscal year 2014 as a result of overall credit-quality improvement in the acquired portfolio and the upcoming expiration of the commercial FDIC loss-sharing arrangement. We also recorded incremental income of $0.4 million during the current quarter related to the liquidation of two loans in this part of the portfolio. While we do not expect consistent high yields on this portion of the portfolio going forward, the portfolio continues to run off and represents a very small portion of the overall loan portfolio with average balances of $135.1 million for the nine months ended of fiscal year 2015 and $203.2 million for the same period of fiscal year 2014, which represents 2% and 3% of the total average loan portfolio, respectively.

Average net loan balances for the third quarter of fiscal year 2015 were $7.12 billion, representing a 9% increase compared to the same period in fiscal year 2014. The growth was focused in the CRE, commercial non-real estate ("C&I") and agribusiness segments of the portfolio.

Loan-related fee income of $2.2 million is included in interest income for the third quarter of fiscal year 2015 compared to $2.1 million for the same period in fiscal year 2014. Loan-related fee income was $6.8 million for the first nine months of fiscal year 2015 compared to $6.0 million for the same period of fiscal year 2014. In addition, certain fees collected at loan origination are considered to be a component of yield on the underlying loans and are deferred and recognized into income over the life of the loans. Amortization related to the FDIC indemnification assets of $1.8 million and $3.3 million for the third quarter of fiscal years 2015 and 2014, respectively, and $6.3 million and $11.2 million for the first nine months of fiscal years 2015 and 2014, respectively, is included as a reduction to interest income.

Investment Portfolio. The carrying value of investment securities and FHLB stock was $1.45 billion as of June 30, 2015. Interest and dividend income on investments includes income earned on investment securities and FHLB stock. Interest and dividend income on investments decreased from $7.0 million in the third quarter of fiscal year 2014 to $6.5 million in the third quarter of fiscal year 2015, a decrease of 7.1%, driven by a reduction in yield from 1.96% in the third quarter of fiscal year 2014 to 1.81% for the same period in fiscal year 2015. Interest and dividend income on investments decreased from $21.0 million in the first nine months of fiscal year 2014 to $18.1 million for the same period in fiscal year 2015, a decrease of 13.9%, driven both by a reduction in yield from 1.97% to 1.76% over the same period.

The weighted average life of the portfolio was 3.3 years and 3.1 years at June 30, 2015 and September 30, 2014, respectively. Average investments represented 16% and 18% of total average interest-earning assets for third quarters of fiscal years 2015 and 2014 and 16% and 18% for the first nine months of fiscal years 2015 and 2014, respectively.

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Interest Expense

The following tables present interest expense for the periods ended June 30, 2015 and 2014:

	Three months ended June 30,
	2015		2014
	(dollars in thousands)
Interest expense:
Deposits	$	5,776	$	6,319
Securities sold under agreements to repurchase	134		153
FHLB advances and other borrowings	867		751
Related party notes payable	233		230
Subordinated debentures and other	330		325
Total interest expense	$	7,340	$	7,778

	Nine months ended June 30,
	2015		2014
	(dollars in thousands)
Interest expense:
Deposits	$	17,775	$	19,629
Securities sold under agreements to repurchase	430		442
FHLB advances and other borrowings	2,706		2,591
Related party notes payable	692		690
Subordinated debentures and other	985		985
Total interest expense	$	22,588	$	24,337

Total interest expense decreased to $7.3 million in the third quarter of fiscal year 2015 from $7.8 million in the same quarter in fiscal year 2014, a decrease of 5.6%, despite an increase in average interest-bearing liabilities from $7.7 billion to $8.3 billion over the same period, driven primarily by lower cost of funds. The average cost of total interest-bearing liabilities was 0.36% for the third quarter of fiscal year 2015, compared to 0.40% for the same period in fiscal year 2014. Total interest expense was $22.6 million for the first nine months of fiscal year 2015, a decrease of 7.2% compared to $24.3 million for the same period in fiscal year 2014. The average cost of total interest-bearing liabilities was 0.37% for the first nine months of fiscal year 2015, compared to 0.42% for the same period in fiscal year 2014. Significant components of interest expense are described in further detail below.

Deposits. Interest expense on deposits, consisting of checking accounts, MMDAs, NOW accounts, savings accounts and CDs, was $5.8 million in the third quarter of fiscal year 2015 compared with $6.3 million in the third quarter of fiscal year 2014, a decrease of $0.5 million, or 8.6%. Average deposit balances were $7.48 billion and $7.14 billion, respectively, for the same periods. The cost of deposits declined from 0.36% for the third quarter of fiscal year 2014 to 0.31% for the same period in fiscal year 2015.

Interest expense on deposits was $17.8 million for the first nine months of fiscal year 2015, a reduction of $1.9 million, or 9.4%, compared to the same period in fiscal year 2014. Average deposit balances were $7.37 billion and $7.13 billion, respectively, and the cost of deposits declined from 0.37% to 0.32%, respectively, for the same periods.

Average non-interest-bearing demand account balances comprised 18% of average total deposits for the current quarter, compared with 17% for the comparable quarter. Total average other liquid accounts, consisting of money market and savings accounts, continued to increase to 62% of total average deposits for the current quarter, compared to 57% of total average deposits for the comparable quarter, while CD accounts represented 20% of average total deposits in the current quarter, compared to 26% in the comparable quarter. These trends in the composition of our deposit portfolio represent a continuation of our strategy over the last three fiscal years to move away from more costly CD accounts toward more cost-effective transaction accounts as well as our focus on

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gathering business deposits, which are typically transaction accounts by nature. This transition, as well as continued low benchmark interest rates, have driven a significant decrease in our cost of deposits over that time frame.

FHLB Advances and Other Borrowings. Interest expense on FHLB advances and other borrowings was $0.9 million for the third quarter of fiscal year 2015, compared to $0.8 million for the same period in fiscal year 2014, reflecting a weighted average cost of 0.66% and 0.97%, respectively. Our average balance for FHLB advances and other borrowings increased to $523.8 million in the current quarter compared to $311.5 million in the comparable quarter. Interest expense on FHLB advances and other borrowings was $2.7 million for the first nine months of fiscal year 2015, compared to $2.6 million for the same period in fiscal year 2014, representing a weighted average cost of 0.67% and 1.11%, respectively. The amount of FHLB advances outstanding has increased to fund the deposit outflow and loan growth that occurred during the quarter. Average FHLB advances and other borrowings as a proportion of total average interest-bearing liabilities were 6.3% for the current quarter compared to 4.0% for the comparable quarter. The average rate paid on FHLB advances is impacted by market rates and the various terms and repricing frequency of the specific outstanding borrowings in each year. Our total outstanding FHLB advances were $590 million at June 30, 2015 compared to $575 million at September 30, 2014. The weighted average contractual rate paid on our FHLB advances was 0.60% at June 30, 2015 and 0.62% at September 30, 2014. The average tenor of our FHLB advances was 61 months and 56 months at June 30, 2015 and September 30, 2014, respectively. The amount of other borrowings and related interest expense as of and for the current quarter were immaterial.

We must collateralize FHLB advances by pledging real estate loans or investments. We pledge more assets than required by our current level of borrowings in order to maintain additional borrowing capacity. Although we may substitute other loans for such pledged loans, we are restricted in our ability to sell or otherwise pledge these loans without substituting collateral or prepaying a portion of the FHLB advances. At June 30, 2015, we had pledged $2.2 billion of loans to the FHLB, against which we had borrowed $590.0 million.

Subordinated Debentures and Other. Interest expense on our outstanding subordinated debentures was $0.3 million in both the current and comparable quarters and $1.0 million in the first nine months of both the current and prior fiscal years. At June 30, 2015, the weighted average contractual rate on outstanding subordinated notes was 2.34% compared to 2.29% at September 30, 2014.

Securities Sold Under Agreements to Repurchase; Related Party Notes Payable. Securities sold under agreements to repurchase represent retail repurchase agreements with customers and, together, with our related party notes payable, represent a small portion of our overall funding profile. The interest expense associated with these two classes of liabilities remained largely consistent between the current quarter and comparable quarter.

Rate and Volume Variances

Net interest income is affected by changes in both volume and interest rates. Volume changes are caused by increases or decreases during the year in the level of average interest-earning assets and average interest-bearing liabilities. Rate changes result from increases or decreases in the yields earned on assets or the rates paid on liabilities.

The following tables present the current and comparable quarter and the first nine months of the current and prior fiscal year and a summary of the changes in interest income and interest expense on a tax equivalent basis resulting from changes in the volume of average asset and liability balances and changes in the average yields or rates compared with the preceding fiscal year. If significant, the change in interest income or interest expense due to both volume and rate has been prorated between the volume and the rate variances based on the dollar amount of each variance. The table illustrates the continued benefit of balance sheet growth, mainly within loans funded by cost-effective deposit growth, partially offset by a reduction in net interest margin most pronounced in loan yield.

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	Current Quarter vs Comparable Quarter
	Volume			Rate			Total
	(dollars in thousands)
Increase (decrease) in interest income:
Cash and due from banks	$	61		$	(5	)	$	56
Investment securities	52			(551		)	(499		)
Loans, other than acquired with deteriorated credit quality	7,763			(3,410		)	4,353
Loans, acquired with deteriorated credit quality	(673		)	1,267			594
Loans	7,090			(2,143		)	4,947
Total increase (decrease)	7,203			(2,699		)	4,504
Increase (decrease) in interest expense:
NOW, MMDA & savings deposits	393			503			896
CDs	(687		)	(752		)	(1,439		)
Securities sold under agreements to repurchase	(29		)	10			(19		)
FHLB advances and other borrowings	401			(285		)	116
Related party notes payable	—			3			3
Subordinated debentures and other	—			5			5
Total increase (decrease)	78			(516		)	(438		)
Increase (decrease) in net interest income (FTE)	$	7,125		$	(2,183	)	$	4,942

	Current 9 month period vs Comparable 9 month period
	Volume			Rate			Total
	(dollars in thousands)
Increase (decrease) in interest income:
Cash and due from banks	$	208		$	(9	)	$	199
Investment securities	(816		)	(2,103		)	(2,919		)
Loans, other than acquired with deteriorated credit quality	21,466			(11,031		)	10,435
Loans, acquired with deteriorated credit quality	(1,846		)	4,715			2,869
Loans	19,620			(6,316		)	13,304
Total increase (decrease)	19,012			(8,428		)	10,584
Increase (decrease) in interest expense:
NOW, MMDA & savings deposits	900			1,348			2,248
CDs	(2,184		)	(1,918		)	(4,102		)
Securities sold under agreements to repurchase	(64		)	52			(12		)
FHLB advances and other borrowings	1,410			(1,295		)	115
Related party notes payable	—			2			2
Subordinated debentures and other	—			—			—
Total increase (decrease)	62			(1,811		)	(1,749		)
Increase (decrease) in net interest income (FTE)	$	18,950		$	(6,617	)	$	12,333

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Provision for Loan Losses

We recognized provision for loan losses of $4.4 million for the third quarter of fiscal year 2015 compared to a provision for loan losses of $1.5 million for the comparable period in fiscal year 2014, an increase of $2.9 million between the periods. The amount of provision for loan losses was lower in the comparable period due to lower net charge-offs driving less required provisioning. Provision for loan losses was $17.4 million for the first nine months of fiscal year 2015 compared to a release of provision for loan losses of $2.1 million for the same period in fiscal year 2014, an increase of $19.5 million. The increase in provision for loan losses over the past nine months was most driven by charge-offs on a small number of primarily C&I exposures in the second quarter. The table below outlines the components of provision for loan losses in each period presented. All loans acquired with deteriorated credit quality for which we recognized improvements or impairments in the periods presented are covered by FDIC loss-sharing arrangements. We did not record any meaningful provision for loans covered by FDIC loss-sharing arrangements related to loans other than loans acquired with deteriorated credit quality in any of the periods presented.

(Dollars in thousands)	Three months ended June 30,					Nine months ended June 30,
	2015			2014		2015			2014
Provision for loan losses, core *	$	4,991		$	1,500	$	18,600		$	(125	)
Provision for loan losses, loans acquired with deteriorated credit quality	(581		)	—		(1,192		)	(1,940		)
Provision for loan losses, total	$	4,410		$	1,500	$	17,408		$	(2,065	)
* As presented above, the core loan portfolio includes originated loans, other than loans for which we have elected the fair value option, and loans we acquired that we did not determine were acquired with deteriorated credit quality.

Total Credit-Related Charges

In addition to the higher provision for loan losses we incurred during the current fiscal quarter compared to the same quarter in fiscal year 2014, we recognized other credit-related charges during the quarter, as discussed elsewhere within this quarterly report. We believe that the following table, which summarizes each component of the total credit-related charges incurred during the current, prior and comparable quarters, is helpful to understanding the overall impact on our quarterly results of operations. Net OREO charges include OREO operating costs, valuation adjustments and gain (loss) on sale of OREO properties, each of which entered OREO as a result of the former borrower failing to perform on a loan obligation. Reversal of interest income on nonaccrual loans occurs when we become aware that a loan, for which we had been recognizing interest income, will no longer be able to perform according to the terms and conditions of the loan agreement, including repayment of interest owed to us. Loan fair value adjustments related to credit relate to the portion of our loan portfolio for which we have elected the Fair Value Option; these amounts reflect expected credit losses in the portfolio.

(Dollars in thousands)		For the three months ended:
Item	Included within F/S Line Item(s):	June 30, 2015			March 31, 2015		June 30, 2014
Provision for loan losses	Provision for loan losses	$	4,410		$	9,679	$	1,500
Net OREO charges	1) Net (gain) loss from sale of repossessed property and other assets 2) Other noninterest expense	1,067			2,634		6,267
Reversal of interest income on nonaccrual loans	Interest income on loans	(100		)	517		(98		)
Loan fair value adjustment related to credit	Net increase (decrease) in fair value of loans at fair value	31			1,184		(689		)
Total		$	5,408		$	14,014	$	6,980

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Noninterest Income

The following table presents noninterest income for the periods ended June 30, 2015 and 2014:

	Three months ended June 30,
	2015			2014
	(dollars in thousands)
Non-interest income:
Service charges and other fees	$	9,627		$	9,695
Net gain on sale of loans	1,903			1,322
Casualty insurance commissions	333			320
Investment center income	742			578
Net gain on sale of securities	—			0
Trust department income	897			942
Other	1,951			1,368
Subtotal, product and service fees	15,453			14,225
Net increase (decrease) in fair value of loans at fair value	(24,394		)	13,886
Net realized and unrealized gain (loss) on derivatives	18,946			(17,797		)
Subtotal, loans at fair value and related derivatives	(5,448		)	(3,911		)
Total noninterest income	$	10,005		$	10,314

	Nine months ended June 30,
	2015			2014
	(dollars in thousands)
Non-interest income:
Service charges and other fees	$	28,896		$	29,728
Net gain on sale of loans	5,027			3,885
Casualty insurance commissions	882			877
Investment center income	1,969			1,757
Net gain on sale of securities	51			6
Trust department income	2,903			2,847
Other	4,556			4,070
Subtotal, product and service fees	44,284			43,170
Net increase in fair value of loans at fair value	7,914			13,506
Net realized and unrealized loss on derivatives	(27,357		)	(25,396		)
Subtotal, loans at fair value and related derivatives	(19,443		)	(11,890		)
Total noninterest income	$	24,841		$	31,280

Our noninterest income is comprised of the various fees we charge our customers for products and services we provide and the impact of changes in fair value of loans for which we have elected the fair value treatment and realized and unrealized gains (losses) on the related interest rate swaps we utilize to manage interest rate risk on these loans. While we are required under US GAAP to present both components within total noninterest income, we believe it is helpful to analyze the two broader components of noninterest income separately to better understand the underlying performance of the business.

Noninterest income was $10.0 million for the third quarter of fiscal year 2015, compared to $10.3 million for the comparable period in fiscal year 2014, a decrease of 3.0%, and $24.8 million for the first nine months of fiscal year 2015, compared to $31.3

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million for the same period in fiscal year 2014, a decrease of 20.6%. This decrease was mostly driven by a $4.8 million increase in the credit risk mark related to fair value loans compared to the same period in fiscal year 2014.

Product and Service Fees. We recognized $15.5 million of noninterest income related to product and service fees in the third quarter of fiscal year 2015, a increase of $1.2 million, or 8.6%, compared to the same period in fiscal year 2014. The primary driver of the change was due to a $0.6 million increase in net gain on sale of loans, which represents the fees we earn originating and selling home mortgages into the secondary market and a $0.6 million increase in other fees.

Noninterest income related to product and services fees was $44.3 million for the first nine months of fiscal year 2015 compared to $43.2 million for the same period in fiscal year 2014, an increase of $1.1 million or 2.6%. Net gain on sale of loans increased $1.1 million, driven by higher mortgage origination volumes, while service charges and other fees decreased by $0.8 million. We believe the decrease in deposit account service charges and fees is representative of changing customer behavior and a shift in mix toward more business deposit accounts, which typically carry higher average balances but incur fewer fees on a relative basis.

Loans at fair value and related derivatives. As discussed in "—Analysis of Financial Condition—Derivatives," changes in the fair value of loans for which we have elected the fair value treatment and realized and unrealized gains and losses on the related derivatives are recognized within noninterest income. For the third quarter of fiscal year 2015, these items accounted for $(5.4) million of noninterest income compared to $(3.9) million for the same period in fiscal year 2014. The change was driven by a $0.7 million difference in the changes in fair value of the loans related to credit risk and a $0.8 million increase in the realized loss on the derivatives driven primarily by volume growth. For the first nine months of fiscal year 2015, these items accounted for $(19.4) million of noninterest income compared to $(11.9) million for the same period of fiscal year 2014. The change was driven by a $4.8 million difference in the changes in fair value of the loans related to credit risk and a $2.7 million increase in the realized loss on the derivatives driven primarily by volume growth. We believe that the current realized loss on the derivatives economically offsets the interest income earned on the related loans; we present elsewhere the adjusted net interest income and adjusted net interest margin reflecting the metrics we use to manage the business.

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Noninterest Expense

The following table presents noninterest expense for the periods ended June 30, 2015 and 2014:

	Three months ended June 30,
	2015			2014
	(dollars in thousands)
Noninterest expense:
Salaries and employee benefits	$	26,612		$	24,126
Occupancy expenses, net	3,161			4,894
Data processing	4,657			4,354
Equipment expenses	1,075			1,077
Advertising	1,196			1,213
Communication expenses	1,031			1,046
Professional fees	3,289			3,620
Net gain from sale of repossessed property and other assets	(1,452		)	(1,564		)
Amortization of core deposits and other intangibles	1,776			4,069
Other	5,085			11,443
Total noninterest expense	$	46,430		$	54,278

	Nine months ended June 30,
	2015			2014
	(dollars in thousands)
Noninterest expense:
Salaries and employee benefits	$	75,373		$	71,176
Occupancy expenses, net	11,169			13,613
Data processing	14,193			14,105
Equipment expenses	2,956			3,099
Advertising	2,870			3,385
Communication expenses	3,429			3,402
Professional fees	10,464			9,623
Net gain from sale of repossessed property and other assets	(1,836		)	(2,413		)
Amortization of core deposits and other intangibles	6,402			13,448
Other	16,939			22,466
Total noninterest expense	$	141,959		$	151,904

Our noninterest expense consists primarily of salaries and employee benefits, net occupancy expenses, data processing, professional fees and amortization of core deposits and other intangibles. Noninterest expense was $46.4 million in the third quarter of fiscal year 2015 compared to $54.3 million for the same period in fiscal year 2014, a decrease of 14.5% or $7.8 million. Adjusted for the amortization of intangible assets, our tangible noninterest expenses were $44.7 million in the third quarter of fiscal year 2015, a 11.1% decrease compared to the same period in fiscal year 2014. The decrease in noninterest expense was primarily driven by:

• a $6.4 million reduction in other noninterest expense, which included a $5.2 million reduction in net OREO costs and a net nonrecurring gain in the current quarter of approximately $1.6 million related to branch closure activities;

• a $2.3 million reduction in amortization of intangible assets; and

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• a $1.7 million reduction in net occupancy expenses stemming from a significant fluctuation in real estate taxes incurred between the two periods; partially offset by a $2.5 million increase in salaries and employee benefits, which includes increases in salaries and health insurance costs.

Noninterest expense was $142.0 million in the first nine months of fiscal year 2015 compared to $151.9 million for the same period in fiscal year 2014, a decrease of 6.5% or $9.9 million. Adjusted for the amortization of intangible assets, our tangible noninterest expenses were $135.6 million in the first nine months of fiscal year 2015, a 11.1% decrease over the same period in fiscal year 2014. The decrease was due to a reduction in other expenses of $5.5 million due to lower OREO expenses and a non-recurring gain on a sale of a closed branch. Our efficiency ratio was 46.4% and 54.8%, respectively, for the three month periods ending June 30, 2015 and 2014. Our efficiency ratio was 48.8% and 50.9%, respectively, for the nine month periods ending June 30, 2015 and 2014. For more information on our tangible noninterest expense and efficiency ratio, including a reconciliation of each to the most directly comparable GAAP financial measures, see "—Non-GAAP Financial Measures" below.

Provision for Income Taxes

The provision for income taxes varies due to the amount of taxable income, the level and effectiveness of tax-advantaged assets and tax credit funds and the rates charged by federal and state authorities. The provision for income taxes of $14.9 million for the third quarter of fiscal year 2015 represents an effective tax rate of 34.0%, compared to a provision of $12.1 million or an effective tax rate of 35.0% for the comparable period. The provision for income taxes of $38.3 million for the first nine months of fiscal year 2015 represents an effective tax rate of 33.7% compared to a provision of $41.6 million or an effective tax rate of 35.0% for the same period in fiscal year 2014. In each case, the decrease in rate is primarily due to a larger amount of tax exempt interest and the mix of state and local taxes we recognized. We have historically calculated our provision for income taxes as though we were a standalone company and we do not expect any material changes in our provisioning for income taxes as a result of our separation from NAB.

Return on Assets and Equity

The table below presents our return on average total assets, return on average common equity, average common equity to average assets ratio and net income per average common share at and for the dates presented:

	At and for the three months ended June 30,
	2015			2014
Return on average total assets	1.18		%	0.98		%
Return on average common equity	7.83		%	6.24		%
Average common equity to average assets ratio	15.30		%	15.64		%
Net income per average common share(1)		$0.50			$0.39
(1) Net income per average common share for the three months ended June 30, 2014 is calculated using the 57,886,114 shares outstanding after the stock split we effected on October 17, 2014 for purposes of comparability. We have calculated that the amount of share dilution during the current quarter was marginal and, as such, diluted EPS equals EPS for all periods presented.

	At and for the nine months ended June 30,
	2015			2014
Return on average total assets	1.04		%	1.12		%
Return on average common equity	6.91		%	7.30		%
Average common equity to average assets ratio	14.99		%	15.10		%
Net income per average common share(1)		$1.30			$1.33
(1) Net income per average common share for the nine months ended June 30, 2014 is calculated using the 57,886,114 shares outstanding after the stock split we effected on October 17, 2014 for purposes of comparability. We have calculated that the amount of share dilution during the current quarter was marginal and, as such, diluted EPS equals EPS for all periods presented.

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Analysis of Financial Condition

The following table highlights certain key financial and performance information as of the dates indicated:

	As of
	June 30, 2015			September 30, 2014
	(dollars in thousands)
Balance Sheet and Other Information:
Total assets	$	9,764,159		$	9,371,429
Loans(1)	7,245,239			6,787,467
Allowance for loan losses	(55,930		)	(47,518		)
Deposits	7,357,688			7,052,180
Stockholders' equity	1,487,851			1,421,090
Tangible common equity(2)	$	782,217		$	709,054
Tier 1 capital ratio	11.5		%	11.8		%
Total capital ratio	12.5		%	12.9		%
Tier 1 leverage ratio	9.4		%	9.1		%
Tangible common equity / tangible assets(2)	8.6		%	8.2		%
Nonperforming loans / total loans	0.94		%	1.16		%
Net charge-offs / average total loans(3)	0.17		%	0.14		%
Allowance for loan losses / total loans	0.77		%	0.70		%
(1) Loans include unpaid principal balance net of unamortized discount on acquired loans and unearned net deferred fees and costs and loans in process.
(2) This is a non-GAAP financial measure we believe is helpful to interpreting our financial results. For more information on this non-GAAP financial measure, including a reconciliation to the most directly comparable GAAP financial measure, see "—Non-GAAP Financial Measures" below.
(3) Annualized for partial-year periods

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Loan Portfolio

The following table presents our loan portfolio by category at each of the dates indicated:

	June 30, 2015		September 30, 2014
	(dollars in thousands)
Unpaid principal balance:
Commercial non-real estate(1)
Loans, other than loans acquired with deteriorated credit quality	$	1,698,135	$	1,562,540
Loans acquired with deteriorated credit quality	2,889		9,100
Total	1,701,024		1,571,640
Agriculture(1)
Loans, other than loans acquired with deteriorated credit quality	1,813,330		1,681,209
Loans acquired with deteriorated credit quality	—		—
Total	1,813,330		1,681,209
Commercial real estate (1)
Loans, other than loans acquired with deteriorated credit quality	2,696,024		2,476,935
Loans acquired with deteriorated credit quality	24,969		64,259
Total	2,720,993		2,541,194
Residential real estate
Loans, other than loans acquired with deteriorated credit quality	835,913		789,386
Loans acquired with deteriorated credit quality	86,568		112,219
Total	922,481		901,605
Consumer
Loans, other than loans acquired with deteriorated credit quality	73,937		88,163
Loans acquired with deteriorated credit quality	1,374		1,923
Total	75,311		90,086
Other lending
Loans, other than loans acquired with deteriorated credit quality	38,901		34,243
Loans acquired with deteriorated credit quality	—		—
Total	38,901		34,243
Total loans, other than loans acquired with deteriorated credit quality	7,156,240		6,632,476
Total loans acquired with deteriorated credit quality	115,800		187,501
Total unpaid principal balance	7,272,040		6,819,977
Less: Unamortized discount on acquired loans	(20,356)		(25,638)
Less: Unearned net deferred fees and costs and loans in process	(6,445)		(6,872)
Total loans	7,245,239		6,787,467
Allowance for loan losses	(55,930)		(47,518)
Loans, net	$	7,189,309	$	6,739,949
(1) Unpaid principal balance for commercial non-real estate, agriculture and commercial real estate loans includes fair value adjustments associated with long-term fixed-rate loans where we have entered into interest rate swaps to hedge our interest rate risk.

During the third quarter of fiscal year 2015, total loans grew by 2.44%, or $172.8 million. The growth was primarily focused in the CRE, C&I and agriculture segments of the portfolio. Over the same time period, residential real estate, consumer and other loan balances remained generally stable.

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The following table presents an analysis of the unpaid principal balance of our loan portfolio at June 30, 2015, by borrower and collateral type and by each of the four major geographic areas we use to manage our markets.

	June 30, 2015
	Nebraska			Iowa / Kansas / Missouri			South Dakota			Arizona / Colorado			Other(2)			Total			%
	(dollars in thousands)
Commercial non-real estate(1)	$	302,263		$	853,696		$	279,541		$	196,595		$	68,929		$	1,701,024		23.4	%
Agriculture(1)	176,374			449,941			648,604			535,171			3,240			1,813,330			25.0	%
Commercial real estate(1)	660,172			749,016			702,959			576,971			31,875			2,720,993			37.4	%
Residential real estate	226,069			321,090			167,434			150,458			57,430			922,481			12.7	%
Consumer	22,217			24,769			22,702			3,734			1,889			75,311			1.0	%
Other lending	—			—			—			—			38,901			38,901			0.5	%
Total	$	1,387,095		$	2,398,512		$	1,821,240		$	1,462,929		$	202,264		$	7,272,040		100	%
% by location	19.1		%	33.0		%	25.0		%	20.1		%	2.8		%	100		%
(1) Unpaid principal balance for commercial non-real estate, agriculture and commercial real estate loans includes fair value adjustments associated with long-term fixed-rate loans where we have entered into interest rate swaps to hedge our interest rate risk.
(2) Balances in this column represent acquired workout loans and certain other loans managed by our staff, commercial and consumer credit card loans, fair value adjustments related to acquisitions and loans for which we have elected the fair value option, which could result in a negative carrying amount in the event of a net negative fair value adjustment.

The following table presents additional detail regarding our agriculture, CRE and residential real estate loans at June 30, 2015:

	June 30, 2015
	(dollars in thousands)
Commercial non-real estate	$	1,701,024
Agriculture real estate	853,163
Agriculture operating loans	960,167
Agriculture	1,813,330
Construction and development	290,525
Owner-occupied CRE	1,128,536
Non-owner-occupied CRE	1,046,392
Multifamily residential real estate	255,540
Commercial real estate	2,720,993
Home equity lines of credit	347,644
Closed-end first lien	440,685
Closed-end junior lien	48,823
Residential construction	85,329
Residential real estate	922,481
Consumer	75,311
Other	38,901
Total unpaid principal balance	$	7,272,040

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Commercial Non-Real Estate. Commercial non-real estate, or business lending, represents one of our core competencies. We believe that providing a tailored range of integrated products and services, including lending, to small- and medium-enterprise customers is the business at which we excel and through which we can generate favorable returns for our stockholders. We offer a number of different products including working capital and other shorter-term lines of credit, fixed-rate loans over a wide range of terms including our tailored business loans, for which we enter into matching interest rate swaps that give us floating payments for all deals over five years, and variable-rate loans with varying terms.

Agriculture. Agriculture loans include farm operating loans and loans collateralized by farm land. According to the American Bankers Association, at March 31, 2015, we were ranked the sixth-largest farm lender bank in the United States measured by total dollar volume of farm loans, and we take great pride in our knowledge of the agricultural industry across our footprint. We consider agriculture lending one of our core competencies. In 2008, agriculture loans comprised approximately 15% of our overall loan portfolio, compared to 25% as of June 30, 2015. We target a 20% to 30% portfolio composition for agriculture loans according to our risk appetite statement approved by our board of directors. Within our agriculture portfolio, loans are diversified across a wide range of subsectors with the majority of the portfolio concentrated within various types of grain, livestock and dairy products, and across different geographical segments within our footprint.

Commercial Real Estate. CRE includes both owner-occupied CRE and non-owner-occupied CRE and construction and development lending. While CRE lending will remain a significant component of our overall loan portfolio, we are committed to managing our exposure to riskier construction and development deals specifically, and to CRE lending in general, by targeting relationships with relatively low loan-to-value positions, priced to reflect the amount of risk we accept as the lender. This focus on rebalancing the portfolio is reflected in the fact that CRE lending comprised nearly 50% of the portfolio at the time of the NAB acquisition in 2008, compared to 37% as of June 30, 2015.

Residential Real Estate. Residential real estate lending reflects 1-to-4-family real estate construction loans, closed-end first-lien mortgages (primarily single-family long-term first mortgages resulting from acquisitions of other banks), closed-end junior-lien mortgages and home equity lines of credit, or HELOCs. Our closed-end first-lien mortgages include a small percentage of single-family first mortgages that we originate and cannot subsequently sell into the secondary market, including jumbo products, adjustable-rate mortgages and rural home mortgages. Conversely, a large percentage of our total single-family first mortgage originations are sold into the secondary market in order to meet our interest rate risk management objectives.

Consumer. Our consumer lending offering comprises a relatively small portion of our total loan portfolio, and predominantly reflects small-balance secured and unsecured products marketed by our retail branches.

Other Lending. Other lending includes all other loan relationships that do not fit within the categories above, primarily consumer and commercial credit cards and customer deposit account overdrafts.

The following table presents the maturity distribution of our loan portfolio as of June 30, 2015. The maturity dates were determined based on the contractual maturity date of the loan:

	1 Year or Less		>1 Through 5 Years		>5 Years		Total
	(dollars in thousands)
Maturity distribution:
Commercial non-real estate	$	726,657	$	464,272	$	510,095	$	1,701,024
Agriculture	820,920		644,846		347,564		1,813,330
Commercial real estate	372,565		1,204,946		1,143,482		2,720,993
Residential real estate	136,753		410,100		375,628		922,481
Consumer	14,890		46,438		13,983		75,311
Other lending	38,901		—		—		38,901
Total	$	2,110,686	$	2,770,602	$	2,390,752	$	7,272,040

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The following table presents the distribution, as of June 30, 2015, of our loans that were due after one year between fixed and variable interest rates:

	Fixed		Variable		Total
	(dollars in thousands)
Maturity distribution:
Commercial non-real estate	$	619,331	$	355,036	$	974,367
Agriculture	778,923		213,487		992,410
Commercial real estate	1,195,694		1,152,734		2,348,428
Residential real estate	205,083		580,645		785,728
Consumer	53,580		6,841		60,421
Total	$	2,852,611	$	2,308,743	$	5,161,354

OREO

In the normal course of business, we obtain title to parcels of real estate and other assets when borrowers are unable to meet their contractual obligations and we initiate foreclosure proceedings, or via deed in lieu of foreclosure actions. OREO assets are considered nonperforming assets. When we obtain title to an asset, we evaluate how best to maintain and protect our interest in the property and seek to liquidate the assets at an acceptable price in a timely manner. Our total OREO carrying value was $22.0 million as of June 30, 2015, a decrease of $21.6 million and $27.6 million compared to March 31, 2015 and September 30, 2014, respectively. The decrease was driven primarily by the liquidation of one longstanding problem asset. The amount of OREO covered by FDIC loss-sharing arrangements was $0.2 million as of June 30, 2015 and $10.6 million as of September 30, 2014. The following table presents our OREO balances for the period indicated:

	Three Months Ended June 30, 2015
	(dollars in thousands)
Beginning balance	$	43,565
Additions to OREO	533
Valuation adjustments and other	(1,951)
Sales	(20,178)
Ending balance	$	21,969

	Nine Months Ended June 30, 2015
	(dollars in thousands)
Beginning balance	$	49,580
Additions to OREO	7,447
Valuation adjustments and other	(7,246)
Sales	(27,812)
Ending balance	$	21,969

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Investments

The following table presents the amortized cost of each category of our investment portfolio at the dates indicated:

	June 30, 2015		September 30, 2014
	(dollars in thousands)
U.S. Treasury securities	$	300,501	$	222,868
U.S. Agency securities	74,379		—
Mortgage-backed securities:
Government National Mortgage Association	905,660		1,113,363
Federal National Mortgage Association	47,727		—
Small Business Assistance Program	77,122		—
States and political subdivision securities	1,864		2,188
Corporate debt securities	4,996		11,732
Other	1,006		1,006
	$	1,413,255	$	1,351,157

We have historically invested excess deposits in high-quality, liquid investment securities including residential agency mortgage-backed securities and, to a lesser extent, U.S. Treasury securities, corporate debt securities and securities issued by U.S. states and political subdivisions. Our investment portfolio serves as a means to collateralize FHLB borrowings and public funds deposits, to earn net spread income on excess deposits and to maintain liquidity and balance interest rate risk. Dating to the beginning of fiscal year 2011, the portfolio composition was heavily weighted toward Government National Mortgage Association ("GNMA") residential agency mortgage-backed securities to fit the risk model and financial return targets of NAB. U.S. Treasury securities comprised 21.5% of the total market value of the portfolio as of June 30, 2015. Since September 30, 2014, the fair value of the portfolio has increased by $69.2 million, or 5.2%.

The following tables present the aggregate amortized cost of each investment category of the investment portfolio and the weighted average yield for each investment category for each maturity period at June 30, 2015. Maturities of mortgage-backed securities may differ from contractual maturities because the mortgages underlying the securities may be called or prepaid without any penalties. The weighted-average yield on these assets is presented below based on the contractual rate, as opposed to a tax equivalent yield concept.

	June 30, 2015
	Due in one year or less				Due after one year through five years				Due after five years through ten years				Due after ten years				Mortgage-backed securities				Securities without contractual maturities				Total
	Amount		Weighted average return		Amount		Weighted average return		Amount		Weighted average return		Amount		Weighted average return		Amount		Weighted average return		Amount		Weighted average return		Amount		Weighted average return
	(dollars in thousands)
U.S. Treasury securities	$	—	—	%	$	300,501	1.40	%	$	—	—	%	$	—	—	%	$	—	—	%	$	—	—	%	$	300,501	1.4	%
U.S. Agency securities	74,379		1.78	%	—		—	%	—		—	%	—		—	%	—		—	%	—		—	%	74,379		1.78	%
Mortgage-backed securities	—		—	%	—		—	%	—		—	%	—		—	%	1,030,509		1.85	%	—		—	%	1,030,509		1.85	%
States and political subdivision securities	674		5.1	%	150		3.00	%	1,040		5.11	%	—		—	%	—		—	%	—		—	%	1,864		4.94	%
Corporate debt securities	—		—	%	4,996		1.80	%	—		—	%	—		—	%	—		—	%	—		—	%	4,996		1.8	%
Other	—		—	%	—		—	%	—		—	%	—		—	%	—		—	%	1,006		—	%	1,006		—	%
Total	$	75,053	1.81	%	$	305,647	1.41	%	1,040		5.11	%	$	—	—	%	$	1,030,509	0.00	%	$	1,006	—	%	$	1,413,255	1.75	%

Asset Quality

We place an asset on nonaccrual status when any installment of principal or interest is more than 90 days past due (except for loans that are well secured and in the process of collection) or earlier when management determines the ultimate collection of all contractually due principal or interest to be unlikely. Restructured loans for which we grant payment or significant interest rate concessions are placed on nonaccrual status until collectability improves and a satisfactory payment history is established, generally

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by the receipt of at least six consecutive payments. Our collection policies related to delinquent and charged-off loans are highly focused on individual relationships, and we believe that these policies are in compliance with all applicable laws and regulations.

The following table presents the dollar amount of nonaccrual loans, OREO, restructured performing loans and accruing loans over 90 days past due, at the end of the dates indicated. Loans covered by FDIC loss-sharing arrangements are generally pooled with other similar loans and are generally accreting purchase discount into income each period. Subject to compliance with the applicable loss-sharing agreement, we are generally indemnified by the FDIC at a rate of 80% for any future credit losses on loans covered by a FDIC loss-sharing arrangement through June 4, 2020 for single-family real estate loans. During the quarter, our loss-sharing arrangement for commercial loans expired June 4, 2015.

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	June 30, 2015			September 30, 2014
	(dollars in thousands)
Nonaccrual loans(1)
Commercial non-real estate
Loans covered by FDIC loss-sharing arrangements	$	—		$	2,126
Loans not covered by FDIC loss-sharing arrangements	8,198			4,908
Total	8,198			7,034
Agriculture
Loans covered by FDIC loss-sharing arrangements	—			—
Loans not covered by FDIC loss-sharing arrangements	21,709			11,453
Total	21,709			11,453
Commercial real estate
Loans covered by FDIC loss-sharing arrangements	—			21,995
Loans not covered by FDIC loss-sharing arrangements	22,000			20,767
Total	22,000			42,762
Residential real estate
Loans covered by FDIC loss-sharing arrangements	8,274			10,839
Loans not covered by FDIC loss-sharing arrangements	7,846			6,671
Total	16,120			17,510
Consumer
Loans covered by FDIC loss-sharing arrangements	—			—
Loans not covered by FDIC loss-sharing arrangements	90			146
Total	90			146
Other lending
Loans covered by FDIC loss-sharing arrangements	—			—
Loans not covered by FDIC loss-sharing arrangements	—			—
Total	—			—
Total nonaccrual loans covered by FDIC loss-sharing arrangements	8,274			34,960
Total nonaccrual loans not covered by FDIC loss-sharing arrangements	59,843			43,945
Total nonaccrual loans	68,117			78,905
OREO	21,969			49,580
Total nonperforming assets	90,086			128,485
Restructured performing loans	54,916			36,857
Total nonperforming and restructured assets	$	145,002		$	165,342
Accruing loans 90 days or more past due	$	102		$	28
Nonperforming restructured loans included in total nonaccrual loans	$	14,764		$	20,415
Nonaccretable difference outstanding related to loans acquired with deteriorated credit quality	$	38,889		$	62,606
Percent of total assets
Nonaccrual loans(1)
Loans not covered by FDIC loss-sharing arrangements	0.61		%	0.47		%
Total	0.70		%	0.84		%
OREO	0.22		%	0.53		%
Nonperforming assets(2)	0.92		%	1.37		%
Nonperforming and restructured assets(2)	1.49		%	1.76		%
(1) Includes nonperforming restructured loans
(2) Includes nonaccrual loans, which includes nonperforming restructured loans.

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At June 30, 2015, our nonperforming assets were 0.92% of total assets, compared to 1.37% at September 30, 2014.

Excluding loans covered by FDIC loss-sharing arrangements, we had average nonaccrual loans (calculated as a two-point average) of $51.9 million outstanding during the first nine months of fiscal year 2015. Based on the average loan portfolio yield for these loans for the quarter, we estimate that interest income would have been $1.9 million higher during the nine months had these loans been accruing. During the same period, the amount of net interest income that we recorded on these loans was immaterial.

Nonaccrual loans not covered by FDIC loss-sharing arrangements increased by $15.9 million compared to September 30, 2014, and by $13.3 million compared to March 31, 2015. The increase was primarily due to the previously mentioned expiration of our commercial loss-share arrangement on June 4, 2015.

Nonaccrual loans covered by FDIC loss-sharing arrangements continued to decline and are down $26.7 million since September 30, 2014, due to the expiration of our commercial loss-share arrangement on June 4, 2015 and natural runoff through payment or foreclosure of the underlying assets.

We consistently monitor all loans internally rated “watch” or worse because that rating indicates we have identified some potential weakness emerging; but loans rated “watch” will not necessarily become problem loans or become impaired. Aside from the loans on the watch list, we do not believe we have any potential problem loans that are not already identified as nonaccrual, past due or restructured as it is our policy to promptly reclassify loans as soon as we become aware of doubts as to the borrowers’ ability to meet repayment terms. We do not have any material interest-bearing assets that would be disclosed as nonperforming loans or restructured performing loans if they were loans.

When we grant concessions to borrowers that we would not otherwise grant if not for the borrowers’ financial difficulties, such as reduced interest rates or extensions of loan periods, we consider these modifications troubled debt restructurings, or TDRs. The table below outlines total TDRs, split between performing and nonperforming loans, at each of the dates indicated:

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	June 30, 2015		September 30, 2014
	(dollars in thousands)
Commercial non-real estate
Performing TDRs	$	9,961	$	6,753
Nonperforming TDRs	1,101		1,785
Total	11,062		8,538
Agriculture
Performing TDRs	80		3,780
Nonperforming TDRs	7,440		9,994
Total	7,520		13,774
Commercial real estate
Performing TDRs	44,170		25,177
Nonperforming TDRs	4,680		6,884
Total	48,850		32,061
Residential real estate
Performing TDRs	668		1,112
Nonperforming TDRs	1,536		1,730
Total	2,204		2,842
Consumer
Performing TDRs	37		35
Nonperforming TDRs	7		22
Total	44		57
Total performing TDRs	54,916		36,857
Total nonperforming TDRs	14,764		20,415
Total TDRs	$	69,680	$	57,272

We entered into loss-sharing arrangements with the FDIC related to certain assets (loans and OREO) acquired from TierOne Bank on June 4, 2010. We are generally indemnified by the FDIC at a rate of 80% for any future credit losses through June 4, 2020 for single-family real estate loans and OREO. Our commercial loss-sharing arrangement with the FDIC expired on June 4, 2015. The table below presents nonaccrual loans, TDRs, and OREO covered by loss-sharing arrangements; a rollforward of the allowance for loan losses for loans covered by loss-sharing arrangements; a rollforward of allowance for loan losses for only those loans purchased with deteriorated credit quality covered by loss-sharing arrangements; and a rollforward of OREO covered by loss-sharing arrangements at and for the periods presented.

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	At and for the nine months ended June 30, 2015			At and for the fiscal year ended September 30, 2014
	(dollars in thousands)
Assets covered by FDIC loss-sharing arrangements
Nonaccrual loans(1)	$	8,274		$	34,960
TDRs	490			5,293
OREO	205			10,628
Allowance for loan losses, loans covered by FDIC loss-sharing arrangements
Balance at beginning of period	$	5,108		$	7,246
Additional impairment recorded	666			2,364
Recoupment of previously-recorded impairment	(1,701		)	(4,482		)
Charge-offs	—			(20		)
Recoveries	—			—
Balance at end of period	$	4,073		$	5,108
OREO covered by FDIC loss-sharing arrangement
Balance at beginning of period	$	10,628		$	24,412
Additions to OREO	1,666			1,785
Valuation adjustments and other	(1,962		)	(3,750		)
Sales	(3,361		)	(11,819		)
Expiration of FDIC loss-sharing arrangement	(6,766		)	—
Balance at end of period	$	205		$	10,628
(1) Includes nonperforming restructured loans.

Allowance for Loan Losses

We establish an allowance for the inherent risk of probable losses within our loan portfolio. The allowance for loan losses is management’s best estimate of probable credit losses that are incurred in the loan portfolio. We determine the allowance for loan losses based on an ongoing evaluation, driven primarily by monitoring changes in loan risk grades, delinquencies and other credit risk indicators, which is an inherently subjective process. We consider the uncertainty related to certain industry sectors and the extent of credit exposure to specific borrowers within the portfolio. In addition, we consider concentration risks associated with the various loan portfolios and current economic conditions that might impact the portfolio. All of these estimates are susceptible to significant change. Changes to the allowance for loan losses are made by charges to the provision for loan losses. Loans deemed to be uncollectible are charged off against the allowance for loan losses. Recoveries of amounts previously charged-off are credited to the allowance for loan losses.

Our allowance for loan losses consists of two components. For non-impaired loans, we calculate a weighted average ratio of 12-, 36- and 60-month historical realized losses by collateral type; adjust as necessary for our interpretation of current economic conditions and current portfolio trends including credit quality, concentrations, aging of the portfolio and/or significant policy and underwriting changes not entirely covered by the calculated historical loss rates; and apply the loss rates to outstanding loan balances in each collateral category. We calculate the weighted average ratio of 12-, 36- and 60-month historical realized losses for each collateral type by dividing the average net annual charge-offs by the average outstanding loans of such type subject to the calculation for each of the 12-, 36- and 60-month periods, then averaging those three results. For impaired loans, we estimate our exposure for each individual relationship, given the current payment status of the loan, the present value of expected payments and the value of the underlying collateral as supported by third party appraisals, broker’s price opinions, and/or the borrower’s audited financial statements, each adjusted for liquidation costs. Any shortfall between the liquidation value of the underlying collateral and the recorded investment value of the loan is considered the required specific reserve amount. Actual losses in any period may exceed allowance amounts. We evaluate and adjust our allowance for loan losses, and the allocation of the allowance between loan categories, each month.

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The following table presents an analysis of our allowance for loan losses, including provisions for loan losses, charge-offs and recoveries, for the periods indicated:

	At and for the nine months ended June 30, 2015			At and for the fiscal year ended September 30, 2014
	(dollars in thousands)
Allowance for loan losses:
Balance at beginning of period	$	47,518		$	55,864
Provision charged to expense	18,600			4,456
Impairment of loans acquired with deteriorated credit quality	(1,192		)	(3,772		)
Charge-offs:
Commercial non-real estate	(9,861		)	(5,380		)
Agriculture	(438		)	(2,429		)
Commercial real estate	(1,932		)	(3,199		)
Residential real estate	(197		)	(631		)
Consumer	(88		)	(211		)
Other lending	(1,187		)	(1,893		)
Total charge-offs	(13,703		)	(13,743		)
Recoveries:
Commercial non-real estate	3,092			1,439
Agriculture	89			58
Commercial real estate	300			1,470
Residential real estate	197			233
Consumer	79			156
Other lending	950			1,357
Total recoveries	4,707			4,713
Net loan charge-offs	(8,996		)	(9,030		)
Balance at end of period	$	55,930		$	47,518
Average total loans for the period(1)	$	6,951,891		$	6,556,818
Total loans at period end(1)	$	7,245,239		$	6,787,467
Ratios
Net charge-offs to average total loans(2)	0.17		%	0.14		%
Allowance for loan losses to:
Total loans	0.77		%	0.70		%
Nonaccruing loans(3)	93.46		%	108.13		%
(1) Loans include unpaid principal balance net of unamortized discount on acquired loans and unearned net deferred fees and costs and loans in process.
(2) Annualized for partial-year periods
(3) Nonaccruing loans excludes loans covered by FDIC loss-sharing arrangements.

In the first nine months of fiscal year 2015, we recorded net charge-offs of $9.0 million, representing 0.17% of average total loans on an annualized basis, a 3 basis point increase compared to 0.14% for fiscal year 2014. The charge-offs we recorded during the first nine months were primarily related to a small number of loans in the C&I portfolio.

At June 30, 2015, the allowance for loan losses was 0.77% of our total loan portfolio, a 7 basis point increase compared with 0.70% at September 30, 2014.

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Additionally, a portion of our loans which are carried at fair value, totaling $1.06 billion and $0.99 billion at June 30, 2015 and September 30, 2014, respectively, have no associated allowance for loan losses, but rather have a fair value adjustment related to credit risk, which is reflected in noninterest income, thus driving the overall ratio of allowance for loan losses to total loans lower. The amount of fair value adjustment related to credit risk on these loans was $5.5 million and $6.0 million at June 30, 2015 and September 30, 2014, respectively.

The following tables present management’s historical allocation of the allowance for loan losses by loan category, in both dollars and percentage of our total allowance for loan losses, to specific loans in those categories at the dates indicated:

	June 30, 2015		September 30, 2014
	(dollars in thousands)
Allocation of allowance for loan losses:
Commercial non-real estate	$	16,950	$	10,550
Agriculture	13,366		10,655
Commercial real estate	17,836		16,884
Residential real estate	6,552		8,342
Consumer	353		264
Other lending	873		823
Total	$	55,930	$	47,518

	June 30, 2015		September 30, 2014
Allocation of allowance for loan losses:
Commercial non-real estate	30.3	%	22.2	%
Agriculture	23.9	%	22.4	%
Commercial real estate	31.9	%	35.5	%
Residential real estate	11.7	%	17.6	%
Consumer	0.6	%	0.6	%
Other lending	1.6	%	1.7	%

Management will continue to evaluate the loan portfolio and assess economic conditions in order to determine future allowance levels and the amount of loan loss provisions. We review the appropriateness of our allowance for loan losses on a monthly basis. Management monitors closely all past due and restructured loans in assessing the appropriateness of its allowance for loan losses. In addition, we follow procedures for reviewing and grading all substantial commercial and agriculture relationships at least annually. Based predominantly upon the review and grading process, we determine the appropriate level of the allowance in response to our assessment of the probable risk of loss inherent in our loan portfolio. Management will make additional loan loss provisions when the results of its problem loan assessment methodology or overall allowance appropriateness test indicate additional provisions are required.

The review of problem loans is an ongoing process during which management may determine that additional charge-offs are required or additional loans should be placed on nonaccrual status. We recorded provision for loan losses of $4.4 million during the third quarter of fiscal year 2015. We have also recorded an allowance for unfunded lending-related commitments that represents our estimate of incurred losses on the portion of lending commitments that borrowers have not advanced. The balance of the allowance for unfunded lending-related commitments was $0.4 million at June 30, 2015 and September 30, 2014.

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Deposits

We obtain funds from depositors by offering consumer and business demand deposit accounts, MMDAs, NOW accounts, savings accounts and term CDs. At June 30, 2015 and September 30, 2014, our total deposits were $7.36 billion and $7.05 billion, respectively, an increase of 4.3%. Our accounts are federally insured by the FDIC up to the legal maximum. We advertise in newspapers, on the Internet and on television and radio to attract deposits and perform limited direct telephone solicitation of potential institutional depositors such as investment managers, public depositors and pension plans. We have significantly shifted the composition of our deposit portfolio away from CDs toward demand, NOW, MMDA and savings accounts over the last 30 months. This has dramatically reduced our overall cost of deposit funding, in addition to the fact that we have greatly increased adherence to internally published rate offerings for various types of deposit account offerings. The following table presents the balances and weighted average cost of our deposit portfolio at the following dates:

	June 30, 2015				September 30, 2014
	Amount		Weighted Avg. Cost		Amount		Weighted Avg. Cost
	(dollars in thousands)
Non-interest-bearing demand	$	1,360,722	—	%	$	1,303,015	—	%
NOW accounts, money market and savings	4,557,119		0.27	%	4,005,471		0.24	%
Time certificates, $100,000 or more	578,992		0.84	%	733,376		0.98	%
Other time certificates	860,855		0.62	%	1,010,318		0.82	%
Total	$	7,357,688	0.31	%	$	7,052,180	0.36	%

Municipal public deposits constituted $0.9 billion and $1.0 billion of our deposit portfolio at June 30, 2015, and September 30, 2014, respectively, of which $577.5 million and $760.0 million, respectively, were required to be collateralized. Our top 10 depositors were responsible for 10% and 9% of our total deposits at June 30, 2015 and September 30, 2014, respectively.

The following table presents deposits by region:

	June 30, 2015		September 30, 2014
	(dollars in thousands)
Nebraska	$	2,398,898	$	2,366,196
Iowa / Kansas / Missouri	2,304,510		2,096,212
South Dakota	1,495,164		1,431,737
Arizona / Colorado	1,143,770		1,105,535
Corporate and other	15,346		52,500
Total deposits	$	7,357,688	$	7,052,180

We fund a portion of our assets with CDs that have balances of $100,000 or more and that have maturities generally in excess of six months. At June 30, 2015 and September 30, 2014, our CDs of $100,000 or more totaled $579 million and $733 million, respectively. The following table presents the maturities of our CDs of $100,000 or more and less than $100,000 in size at June 30, 2015:

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	Greater than or equal to $100,000			Less than $100,000
	(dollars in thousands)
Remaining maturity:
Three months or less	$	125,341		$	184,670
Over three through six months	91,055			161,383
Over six through twelve months	162,278			226,097
Over twelve months	200,318			288,705
Total	$	578,992		$	860,855
Percent of total deposits	7.9		%	11.7		%

At June 30, 2015 and September 30, 2014, the average remaining maturity of all CDs was approximately 14 months and 13 months, respectively. The average CD amount per account was approximately $26,945 and $28,581 at June 30, 2015 and September 30, 2014, respectively.

Derivatives

In the normal course of business, we enter into fixed-rate loans having original maturities of 5 years or greater (typically between 5 and 15 years) with certain of our commercial and agribusiness banking customers to assist them in facilitating their risk management strategies. We mitigate our interest rate risk associated with these loans by entering into equal and offsetting fixed-to-floating interest rate swap agreements for these loans with swap counterparites. We have elected to account for the loans at fair value under ASC 825 Fair ValueOption. Changes in the fair value of these loans are recorded in earnings as a component of noninterest income in the relevant period. The related interest rate swaps are recognized as either assets or liabilities in our financial statements and any gains or losses on these swaps, both realized and unrealized, are recorded in earnings as a component of noninterest income. The economic hedges are fully effective from an interest rate risk perspective, as gains and losses on our swaps are directly offset by changes in fair value of the hedged loans (i.e., swap interest rate risk adjustments are directly offset by associated loan interest rate risk adjustments). Consequently, any changes in noninterest income associated with changes in fair value resulting from interest rate movement, as opposed to changes in credit quality, on the loans are directly offset by equal and opposite unrealized charges to or reductions in noninterest income for the related interest rate swap. Any changes in the fair value of the loans related to credit quality and the current realized gain (loss) on derivatives are not offsetting amounts within noninterest income. To ensure the correlation of movements in fair value between the interest rate swap and the related loan, we pass on all economic costs associated with our hedging activity resulting from loan customer prepayments (partial or full) to the customer.

Short-Term Borrowings

Our primary sources of short-term borrowings include securities sold under repurchase agreements and certain FHLB advances maturing within 12 months. The following table presents certain information with respect to only our borrowings with original maturities less than 12 months at and for the periods noted:

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	At and for the nine months ended June 30, 2015			At and for the fiscal year ended September 30, 2014
	(dollars in thousands)
Short-term borrowings:
Securities sold under agreements to repurchase	$	158,611		$	157,979
Related party notes payable	5,500			5,500
Other short-term borrowings	0			94
Total short-term borrowings	$	164,111		$	163,573
Maximum amount outstanding at any month-end during the period	$	218,278		$	264,345
Average amount outstanding during the period	$	179,538		$	205,483
Weighted average rate for the period	0.33		%	0.42		%
Weighted average rate as of date indicated	0.31		%	0.37		%

Until July 31, 2015, Great Western had a $10 million revolving line of credit issued by NAB that was due on demand. Amounts outstanding under the line of credit bear interest at a rate equal to the London inter-bank offered rate, or LIBOR, for three-month U.S. dollar deposits plus 125 basis points, with interest payable quarterly. The interest rate is recalculated every quarter and was 1.53% at June 30, 2015. There were outstanding advances of $5.5 million on this line of credit at each of June 30, 2015 and September 30, 2014. We incurred an immaterial amount of interest expense related to this facility during the quarter. On July 31, 2015, we repaid our outstanding advances to NAB in full using available cash.

Other Borrowings

Great Western has outstanding $56.1 million of junior subordinated debentures to affiliated trusts in connection with the issuance of trust preferred securities by such trusts as of June 30, 2015 and September 30, 2014. We are permitted under applicable laws and regulations to count these trust preferred securities as part of our Tier 1 capital.

Until July 31, 2015, Great Western also had outstanding a subordinated capital note issued to NAB New York Branch having an aggregate principal amount of approximately $35.8 million maturing in June 2018. Interest on the note is payable quarterly and accrues at a rate equal to LIBOR for three-month U.S. dollar deposits plus 205 basis points. The interest rate on the note is recalculated every quarter and was 2.33% at June 30, 2015. We incurred $0.2 million in interest expense on the outstanding note during the quarter. Subject to receipt of regulatory approval, we may prepay the note at any time, in whole but not in part, without penalty. On July 31, 2015, we repaid our obligations to NAB in full using a combination of available cash and proceeds of a $35 million private placement of subordinated debt.

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Off-Balance Sheet Commitments, Commitments, Guarantees and Contractual Obligations

The following table summarizes the maturity of our contractual obligations and other commitments to make future payments at June 30, 2015. Customer deposit obligations categorized as “not determined” include noninterest-bearing demand accounts, NOW accounts, MMDAs and passbook accounts.

	Less Than 1 Year		1 to 2 Years		2 to 5 Years		>5 Years		Not Determined		Total
	(dollars in thousands)
Contractual Obligations:
Customer deposits	$	950,824	$	257,328	$	213,143	$	18,551	$	5,917,842	$	7,357,688
Securities sold under agreement to repurchase	158,688		—		2,871		—		—		161,559
FHLB advances and other borrowings	90,520		25,000		100,000		375,000		—		590,520
Related party notes payable	5,500		—		35,795		—		—		41,295
Subordinated debentures(1)	—		—		—		56,083		—		56,083
Accrued interest payable	4,211		—		—		—		—		4,211
Interest on FHLB advances	3,126		2,323		5,750		4,091		—		15,290
Interest on related party notes payable(1)	835		835		1,044		—		—		2,714
Other Commitments:
Commitments to extend credit—non-credit card	$	1,128,194	$	119,946	$	306,675	$	182,187	$	—	$	1,737,002
Commitments to extend credit—credit card	176,651		—		—		—		—		176,651
Letters of credit	54,048		—		—		—		—		54,048
(1) The outstanding balance of our $10 million line of credit with NAB New York Branch and our subordinated debentures can be prepaid at any time without penalty; therefore, no future interest payments, other than those already accrued, are reflected.

Instruments with Off-Balance Sheet Risk

In the normal course of business, we enter into various transactions that are not included in our consolidated financial statements in accordance with GAAP. These transactions include commitments to extend credit to our customers and letters of credit. Commitments to extend credit are agreements to lend to a customer provided there is no violation of any condition established in the commitment. Since many of the commitments are expected to expire without being drawn upon, the total commitment amounts do not necessarily represent future cash requirements. Letters of credit are conditional commitments issued primarily to support or guarantee the performance of a customer’s obligations to a third party. The credit risk involved in issuing letters of credit is essentially the same as originating a loan to the customer. We manage the risks associated with these arrangements by evaluating each customer’s creditworthiness prior to issuance through a process similar to that used by us in deciding whether to extend credit to the customer.

The following table presents the total notional amounts of all commitments by us to extend credit and letters of credit as of the dates indicated:

	June 30, 2015		September 30, 2014
	(dollars in thousands)
Commitments to extend credit	$	1,913,653	$	1,939,544
Letters of credit	54,048		54,381
Total	$	1,967,701	$	1,993,925

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Liquidity

Liquidity refers to our ability to maintain cash flow that is adequate to fund operations and meet present and future financial obligations through either the sale or maturity of existing assets or by obtaining additional funding through liability management. We consider the effective and prudent management of liquidity to be fundamental to our health and strength. Our objective is to manage our cash flow and liquidity reserves so that they are adequate to fund our obligations and other commitments on a timely basis and at a reasonable cost.

Our liquidity risk is managed through a comprehensive framework of policies and limits overseen by our bank’s asset and liability committee. We continuously monitor and make adjustments to our liquidity position by adjusting the balance between sources and uses of funds as we deem appropriate. Our primary measures of liquidity include monthly cash flow analyses under ordinary business activities and conditions and under situations simulating a severe run on our bank. We also monitor our bank’s deposit to loan ratio to ensure high quality funding is available to support our strategic lending growth objectives, and have internal management targets for the FDIC’s liquidity ratio, net short-term non-core funding dependence ratio and non-core liabilities to total assets ratio. The results of these measures and analyses are incorporated into our contingency funding plan, which provides the basis for the identification of our liquidity needs.

Great Western Bancorp, Inc. Great Western Bancorp, Inc.'s ("GWBI") primary source of liquidity is cash obtained from dividends by our bank. We primarily use our cash for the payment of dividends, when and if declared by our board of directors, and the payment of interest on our outstanding junior subordinated debentures and related party notes payable. We also use cash, as necessary, to satisfy the needs of our bank through equity contributions and for acquisitions. At June 30, 2015, GWBI had $27.6 million of cash. During the third quarter of fiscal year 2015, we declared and paid a dividend of $0.12 per share. The outstanding amounts under our revolving line of credit with NAB and subordinated capital note issued to NAB New York Branch together totaled $41.3 million at June 30, 2015. We repaid this amount in full to NAB on July 31, 2015 with a combination of available cash and the proceeds of a $35 million private placement of subordinated debt. Our management believes that the sources of available liquidity are adequate to meet all reasonably foreseeable short-term and intermediate-term demands. We may consider raising additional capital in public or private offerings of debt or equity securities.

Great Western Bank. Our bank maintains sufficient liquidity by maintaining minimum levels of excess cash reserves (measured on a daily basis), a sufficient amount of unencumbered, highly liquid assets and access to contingent funding with the FHLB. At June 30, 2015, our bank had cash of $187.2 million and $1.41 billion of highly-liquid securities held in our investment portfolio, of which $974.2 million were pledged as collateral on public deposits, securities sold under agreements to repurchase, and for other purposes as required or permitted by law. The balance could be sold to meet liquidity requirements. Our bank also had $590 million in FHLB borrowings at June 30, 2015, with additional available lines of $677 million. Our bank primarily uses liquidity to meet loan requests and commitments (including commitments under letters of credit), to accommodate outflows in deposits and to take advantage of interest rate market opportunities. At June 30, 2015, we had a total of $1.97 billion of outstanding exposure under commitments to extend credit and issued letters of credit. Our management believes that the sources of available liquidity are adequate to meet all our bank’s reasonably foreseeable short-term and intermediate-term demands.

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Capital

As a bank holding company, we must comply with the capital requirements established by the Federal Reserve, and our bank must comply with the capital requirements established by the FDIC. The current risk-based guidelines applicable to us and our bank are based on the Basel III framework, as implemented by the federal bank regulators.

The following table presents our regulatory capital ratios at June 30, 2015 and the standards for both well-capitalized depository institutions and minimum capital requirements. Our capital ratios exceeded applicable regulatory requirements.

	Actual
	Capital Amount		Ratio		Minimum Capital Requirement Ratio		Well Capitalized Ratio
	(dollars in thousands)
Great Western Bancorp, Inc.
Tier 1 capital	$	857,160	11.5	%	4.0	%	6.0	%
Total capital	927,449		12.5	%	8.0	%	10.0	%
Tier 1 leverage	857,160		9.4	%	4.0	%	5.0	%
Common equity Tier 1	801,077		10.8	%	4.5	%	6.5	%
Risk-weighted assets	7,435,281
Great Western Bank
Tier 1 capital	$	863,804	11.6	%	4.0	%	6.0	%
Total capital	919,775		12.4	%	8.0	%	10.0	%
Tier 1 leverage	863,804		9.5	%	4.0	%	5.0	%
Common equity Tier 1	863,804		11.6	%	4.5	%	6.5	%
Risk-weighted assets	7,432,893

At June 30, 2015 and September 30, 2014, our Tier 1 capital included an aggregate of $56.1 million of trust preferred securities issued by our subsidiaries. At June 30, 2015, our Tier 2 capital included $55.9 million of the allowance for loan losses and $14.3 million of an intercompany subordinated capital note, subject to phase-out and a current haircut of 40%. At September 30, 2014, our Tier 2 capital included $47.5 million of the allowance for loan losses and $21.5 million of an intercompany subordinated capital note, subject to phase-out and a haircut of 60%. Our total risk-weighted assets were $7.44 billion at June 30, 2015.

In July 2013, the federal bank regulators approved capital rules implementing the Basel III capital framework and various provisions of the Dodd-Frank Act (the "New Capital Rules"). Effective January 1, 2015, we and our bank adopted these rules, subject to the phase-in of certain provisions. In addition to other changes, the New Capital Rules established a new common equity Tier 1 capital ratio.

Non-GAAP Financial Measures

We rely on certain non-GAAP measures in making financial and operational decisions about our business which adjusts for certain items that we do not consider reflective of our business performance. We believe that each of the non-GAAP measures presented is helpful in highlighting trends in our business, financial condition and results of operations which might not otherwise be apparent when relying solely on our financial results calculated in accordance with U.S. generally accepted accounting principles, or GAAP.

In particular, we evaluate our profitability and performance based on our cash net income and return on average tangible common equity, each of which excludes the effects of amortization expense relating to intangible assets and related tax effects from

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the acquisition of us by NAB and our acquisitions of other institutions. We believe these measures help highlight trends associated with our financial condition and results of operations by providing net income and return information based on our cash payments and receipts during the applicable period.

We also evaluate our profitability and performance based on our adjusted net interest income, adjusted net interest margin, adjusted interest income on loans other than loans acquired with deteriorated credit quality and adjusted yield on loans other than loans acquired with deteriorated credit quality. We adjust each of these four measures to include the current realized gain (loss) of derivatives we use to manage interest rate risk on certain of our loans, which we believe economically offsets the interest income earned on the loans. Similarly, we evaluate our operational efficiency based on our efficiency ratio, which excludes the effect of amortization of core deposit and other intangibles (a non-cash expense item) and includes the tax benefit associated with our tax-advantaged loans.

We evaluate our financial condition based on the ratio of our tangible common equity to our tangible assets. Our calculation of this ratio excludes the effect of our goodwill and other intangible assets. We believe this measure is helpful in highlighting the common equity component of our capital and because of its focus by federal bank regulators when reviewing the health and strength of financial institutions in recent years and when considering regulatory approvals for certain actions, including capital actions.

Reconciliations for each of these non-GAAP financial measures to the closest GAAP financial measures are included in the tables below. Each of the non-GAAP measures presented should be considered in context with our GAAP financial results included in this filing.

	At or for the nine months ended						At or for the three months ended
	June 30, 2015			June 30, 2014			June 30, 2015			March 31, 2015			December 31, 2014			September 30, 2014			June 30, 2014
Cash net income and return on average tangible common equity:
Net income	$	75,253		$	77,077		$	28,832		$	19,724		$	26,697		$	27,875		$	22,503
Add: Amortization of intangible assets	6,402			13,448			1,776			2,313			2,313			2,768			4,069
Add: Tax on amortization of intangible assets	(660		)	(2,433		)	(220		)	(220		)	(220		)	(811		)	(811		)
Cash net income	$	80,995		$	88,092		$	30,388		$	21,817		$	28,790		$	29,832		$	25,761
Average common equity	$	1,456,174		$	1,411,137		$	1,476,556		$	1,458,131		$	1,433,837		$	1,439,117		$	1,445,813
Less: Average goodwill and other intangible assets	708,799			721,630			706,526			708,782			711,088			713,462			717,104
Average tangible common equity	$	747,375		$	689,507		$	770,030		$	749,349		$	722,749		$	725,655		$	728,709
Return on average common equity	6.91		%	7.30		%	7.83		%	5.49		%	7.39		%	7.68		%	6.24		%
Return on average tangible common equity *	14.5		%	17.1		%	15.8		%	11.8		%	15.8		%	16.3		%	14.2		%
* Calculated as cash net income divided by average tangible common equity. Annualized for partial-year periods.
Adjusted net interest income and adjusted net interest margin (fully-tax equivalent basis):
Net interest income	$	248,072		$	237,198		$	84,538		$	80,625		$	82,909		$	83,226		$	80,100
Add: Tax equivalent adjustment	4,798			3,339			1,704			1,590			1,504			1,324			1,200
Net interest income (FTE)	252,870			240,537			86,242			82,215			84,413			84,550			81,300
Add: Current realized derivative gain (loss)	(16,005		)	(13,277		)	(5,416		)	(5,307		)	(5,282		)	(4,978		)	(4,600		)
Adjusted net interest income (FTE)	$	236,865		$	227,260		$	80,826		$	76,908		$	79,131		$	79,572		$	76,700
Average interest earning assets	$	8,624,469		$	8,067,544		$	8,756,244		$	8,560,477		$	8,556,688		$	8,181,194		$	8,098,052
Net interest margin (FTE) *	3.92		%	3.99		%	3.95		%	3.89		%	3.91		%	4.10		%	4.03		%
Adjusted net interest margin (FTE) **	3.67		%	3.77		%	3.70		%	3.64		%	3.67		%	3.86		%	3.80		%
* Calculated as net interest income (FTE) divided by average interest earning assets. Annualized for partial-year periods.
** Calculated as adjusted net interest income (FTE) divided by average interest earning assets. Annualized for partial-year periods.

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	At or for the nine months ended						At or for the three months ended
	June 30, 2015			June 30, 2014			June 30, 2015			March 31, 2015			December 31, 2014			September 30, 2014			June 30, 2014
Adjusted interest income and adjusted yield (fully-tax equivalent basis), on loans other than loans acquired with deteriorated credit quality:
Interest income	$	244,783		$	235,807		$	83,094		$	80,317		$	81,372		$	82,968		$	79,245
Add: Tax equivalent adjustment	4,798			3,339			1,704			1,590			1,504			1,324			1,200
Interest income (FTE)	249,581			239,146			84,798			81,907			82,876			84,292			80,445
Add: Current realized derivative gain (loss)	(16,005		)	(13,277		)	(5,416		)	(5,307		)	(5,282		)	(4,978		)	(4,600		)
Adjusted interest income (FTE)	$	233,576		$	225,869		$	79,382		$	76,600		$	77,594		$	79,314		$	75,845
Average loans other than loans acquired with deteriorated credit quality	$	6,816,785		$	6,239,191		$	6,995,340		$	6,828,510		$	6,626,507		$	6,527,721		$	6,362,850
Yield (FTE) *	4.90		%	5.12		%	4.86		%	4.86		%	4.96		%	5.12		%	5.07		%
Adjusted yield (FTE) **	4.58		%	4.84		%	4.55		%	4.55		%	4.65		%	4.82		%	4.78		%
* Calculated as interest income (FTE) divided by average loans. Annualized for partial-year periods.
** Calculated as adjusted interest income (FTE) divided by average loans. Annualized for partial-year periods.
Efficiency ratio:
Total revenue	$	272,913		$	268,477		$	94,543		$	87,561		$	90,809		$	91,727		$	90,414
Add: Tax equivalent adjustment	4,798			3,339			1,704			1,590			1,504			1,324			1,200
Total revenue (FTE)	$	277,711		$	271,816		$	96,247		$	89,151		$	92,313		$	93,051		$	91,614
Noninterest expense	$	141,959		$	151,904		$	46,430		$	48,438		$	47,091		$	48,318		$	54,279
Less: Amortization of intangible assets	6,402			13,448			1,776			2,313			2,313			2,768			4,069
Tangible noninterest expense	$	135,557		$	138,456		$	44,654		$	46,125		$	44,778		$	45,550		$	50,210
Efficiency ratio *	48.8		%	50.9		%	46.4		%	51.7		%	48.5		%	49.0		%	54.8		%
* Calculated as the ratio of tangible noninterest expense to total revenue (FTE).
Tangible common equity to tangible assets:
Total stockholders' equity	$	1,487,851		$	1,430,964		$	1,487,851		$	1,469,552		$	1,451,370		$	1,421,090		$	1,430,964
Less: Goodwill and other intangible assets	705,634			714,803			705,634			707,410			709,723			712,036			714,803
Tangible common equity	$	782,217		$	716,161		$	782,217		$	762,142		$	741,647		$	709,054		$	716,161
Total assets	$	9,764,159		$	9,292,283		$	9,764,159		$	9,781,645		$	9,641,261		$	9,371,429		$	9,292,283
Less: Goodwill and other intangible assets	705,634			714,803			705,634			707,410			709,723			712,036			714,803
Tangible assets	$	9,058,525		$	8,577,480		$	9,058,525		$	9,074,235		$	8,931,538		$	8,659,393		$	8,577,480
Tangible common equity to tangible assets	8.6		%	8.3		%	8.6		%	8.4		%	8.3		%	8.2		%	8.3		%

Internal Control Over Financial Reporting

Until our initial public offering in October 2014, we were a wholly owned subsidiary of NAB, and our results have been included in NAB’s consolidated financial statements since NAB acquired us in 2008. As a result, we have historically reported our financial results to NAB under International Financial Reporting Standards (“IFRS”), which were applicable to us as a wholly owned subsidiary of NAB. In accordance with the terms of the Stockholder Agreement we entered into with NAB, we are required to report our financial results to NAB under IFRS until such time as NAB is no longer required under IFRS to account in its financial

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statements for its holdings in our business under an equity method of accounting (unless our obligation is terminated earlier by NAB). In addition, as regulated financial institutions, we and our bank have also reported our financial results under GAAP for an extended period of time, as required under the financial reporting regulatory regime applicable to financial institutions and their holding companies in the U.S. We are required to report financial results under GAAP to the Federal Reserve, and our bank is also required to report financial results under GAAP to the FDIC and the South Dakota Division of Banking.

As a publicly traded company, we are subject to the financial reporting standards prescribed under GAAP and SEC rules, which are more extensive than the standards applicable to us as a wholly owned subsidiary of NAB prior to our initial public offering. Complying with these heightened financial reporting standards has required us to implement enhancements to the design and operation of our internal control over financial reporting. In the process of preparing additional disclosures required by the SEC for public companies contained within our consolidated financial statements under these requirements in connection with our initial public offering, during the third quarter of fiscal year 2014, we concluded a material weakness existed in the design and operation of our internal control over financial reporting. A material weakness is a deficiency, or combination of deficiencies, in internal control over financial reporting such that there is a reasonable possibility that a material misstatement of our financial statements will not be prevented or detected on a timely basis. The material weakness identified resulted primarily from a lack of sufficient resources and personnel within the accounting function engaged in the preparation and review of our consolidated financial statements and a lack of formal controls and procedures with respect to our internal review of the accuracy and completeness of our application of SEC rules to our consolidated financial statements. The material weakness did not affect our reported net income or stockholders' equity for any financial reporting period or materially affect our reported total assets and total liabilities for any financial reporting period.

Following identification of the material weakness, we implemented a number of controls and procedures designed to improve our control environment. In particular, we hired additional members of our accounting and financial reporting staff in the preparation and review of the consolidated financial statements for the year ended September 30, 2014 and the quarters ended June 30, 2015, March 31, 2015 and December 31, 2014 and have implemented a more formal preparation and review hierarchy designed to identify and resolve potential errors on a timely basis. In addition, within our financial reporting function, we have hired additional personnel with SEC publicly traded company reporting experience to assist with the preparation and review of future financial statements and have allocated a greater number of our employees to assist with these processes. We have also contracted with two independent consulting firms to assist us in the preparation of our consolidated financial statements.

Although we believe these changes to our control environment will be sufficient to remediate our previously identified material weakness, we believe that further reporting periods are required to confirm the remediation as well as the ongoing effectiveness of the revised control environment. We may be unsuccessful in implementing all remedial measures we may undertake, and these measures may not significantly improve or remediate the material weakness identified in the design and operating effectiveness of our internal control over financial reporting, which, in future periods, could impact our ability to report our financial results accurately or on a timely basis. As a result of the material weakness, our Chief Executive Officer and our Chief Financial Officer concluded that our disclosure controls and procedures were not effective as of September 30, 2014.

More generally, if we are unable to meet the demands that have been placed upon us as a public company, including the requirements of Sarbanes-Oxley, we may be unable to accurately report our financial results in future periods, or report them within the timeframes required by law or stock exchange regulations. Failure to comply with Sarbanes-Oxley, when and as applicable, could also potentially subject us to sanctions or investigations by the SEC or other regulatory authorities. Under such circumstances, we may be unable to implement the necessary internal controls in a timely manner, or at all, and future material weaknesses may exist or may be discovered. If we fail to implement the necessary improvements, or if material weaknesses or other deficiencies occur, our ability to accurately and timely report our financial position could be impaired, which could result in late filings of our annual and quarterly reports under the Exchange Act, restatements of our consolidated financial statements, a decline in our stock price, suspension or delisting of our common stock from the NYSE and could have a material adverse effect on our business, results of operations or financial condition. Even if we are able to report our financial statements accurately and in a timely manner, any failure in our efforts to implement the improvements or disclosure of material weaknesses in our future filings with the SEC could cause our reputation to be harmed and our stock price to decline significantly.

We have not performed an evaluation of our internal control over financial reporting, as contemplated by Section 404 of Sarbanes-Oxley, nor have we engaged our independent registered public accounting firm to perform an audit of our internal control over financial reporting as of any balance sheet date reported in our financial statements. Had we performed such an evaluation or had our independent registered public accounting firm performed an audit of our internal control over financial reporting under Section 404 of Sarbanes-Oxley, additional control deficiencies, including additional material weaknesses and significant deficiencies, may

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have been identified. In addition, the JOBS Act provides that, so long as we qualify as an “emerging growth company,” we will be exempt from the provisions of Section 404(b) of Sarbanes-Oxley, which would require that our independent registered public accounting firm provide an attestation report on the effectiveness of our internal control over financial reporting. We may take advantage of this exemption so long as we qualify as an “emerging growth company.”

Impact of Inflation and Changing Prices

Our financial statements included in this prospectus have been prepared in accordance with GAAP, which requires us to measure financial position and operating results primarily in terms of historic dollars. Changes in the relative value of money due to inflation or recession generally are not considered. The primary effect of inflation on our operations is reflected in increased operating costs. In our management’s opinion, changes in interest rates affect the financial condition of a financial institution to a far greater degree than changes in the inflation rate. While interest rates are greatly influenced by changes in the inflation rate, they do not necessarily change at the same rate or in the same magnitude as the inflation rate. Interest rates are highly sensitive to many factors that are beyond our control, including changes in the expected rate of inflation, the influence of general and local economic conditions and the monetary and fiscal policies of the United States government, its agencies and various other governmental regulatory authorities.

Recent Accounting Pronouncements

See "Note 2. New Accounting Pronouncements" in the accompanying "Notes to Unaudited Consolidated Financial Statements" included in this report for a discussion of new accounting pronouncements and their expected impact on our financial statements.

Critical Accounting Policies and the Impact of Accounting Estimates

There have been no material changes to our critical accounting policies and accounting estimates from those disclosed in our Annual Report on Form 10-K for the fiscal year ended September 30, 2014.

ITEM 3. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

As of June 30, 2015, there have been no material changes in the quantitative and qualitative information about market risk provided pursuant to Item 305 of Regulation S-K as presented in our Annual Report on Form 10-K for the fiscal year ended September 30, 2014.

Evaluation of Interest Rate Risk

We use a net interest income simulation model to measure and evaluate potential changes in our net interest income. We run various hypothetical interest rate scenarios at least monthly and compare these results against a scenario with no changes in interest rates. Our net interest income simulation model incorporates various assumptions, which we believe are reasonable but which may have a significant impact on results such as: (1) the timing of changes in interest rates, (2) shifts or rotations in the yield curve, (3) re-pricing characteristics for market-rate-sensitive instruments on and off balance sheet, (4) differing sensitivities of financial instruments due to differing underlying rate indices, (5) varying loan prepayment speeds for different interest rate scenarios, (6) the effect of interest rate limitations in our assets, such as floors and caps, (7) the effect of our interest rate swaps, and (8) overall growth and repayment rates and product mix of assets and liabilities. Because of limitations inherent in any approach used to measure interest rate risk, simulation results are not intended as a forecast of the actual effect of a change in market interest rates on our results but rather as a means to better plan and execute appropriate asset-liability management strategies and manage our interest rate risk.

Potential changes to our adjusted net interest income (i.e., GAAP net interest income plus current realized gain or loss on derivatives) in hypothetical rising and declining rate scenarios calculated as of June 30, 2015 are presented in the following table. The projections assume (1) immediate, parallel shifts downward of the yield curve of 100 basis points and immediate, parallel shifts upward of the yield curve of 100, 200, 300 and 400 basis points and (2) gradual shifts downward of 100 basis points over 12 months and gradual shifts upward of 100, 200, 300 and 400 basis points over 12 months. In the current interest rate environment, a downward shift of the yield curve of 200, 300 and 400 basis points does not provide us with meaningful results. In a downward parallel shift of the yield curve, interest rates at the short-end of the yield curve are not modeled to decline any further than 0%. For the immediate-shift scenarios, we assume short-term rates follow a forward yield curve throughout the forecast period that is dictated by the

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instantaneously shocked yield curve from the as of date. In the gradual-shift scenarios, we take each rate across the yield curve from the as of date and shock it by 1/12th of the total change in rates each month for twelve months.

	Estimated Increase (Decrease) in Annualized Adjusted Net Interest Income for the Quarter Ended June 30, 2015
Change in Market Interest Rates as of June 30, 2015	Twelve Months Ending June 30, 2016		Twelve Months Ending June 30, 2017
Immediate Shifts
+400 basis points	15.58	%	9.09	%
+300 basis points	11.70	%	6.93	%
+200 basis points	7.67	%	4.66	%
+100 basis points	3.62	%	2.33	%
-100 basis points	(2.31	)%	(2.45	)%
Gradual Shifts
+400 basis points	4.79	%
+300 basis points	3.39	%
+200 basis points	2.06	%
+100 basis points	0.78	%
-100 basis points	(0.34	)%

We primarily use interest rate swaps to ensure that long-term fixed-rate loans are effectively re-priced as short-term rates change, which we believe would allow us to achieve these results.  The results of this simulation analysis are hypothetical, and a variety of factors might cause actual results to differ substantially from what is depicted. For example, if the timing and magnitude of interest rate changes differ from those projected, our net interest income might vary significantly. Non-parallel yield curve shifts such as a flattening or steepening of the yield curve or changes in interest rate spreads, would also cause our net interest income to be different from that depicted. An increasing interest rate environment could reduce projected net interest income if deposits and other short-term liabilities re-price faster than expected or faster than our assets re-price. Actual results could differ from those projected if we grow assets and liabilities faster or slower than estimated, if we experience a net outflow of deposit liabilities or if our mix of assets and liabilities otherwise changes. Actual results could also differ from those projected if we experience substantially different repayment speeds in our loan portfolio than those assumed in the simulation model. Finally, these simulation results do not contemplate all the actions that we may undertake in response to potential or actual changes in interest rates, such as changes to our loan, investment, deposit, funding or hedging strategies.

For more information on our adjusted net interest income, including a reconciliation to the most directly comparable GAAP financial measures, see "—Non-GAAP Financial Measures" above.

ITEM 4. CONTROLS AND PROCEDURES

(a) Evaluation of Disclosure Controls and Procedures.    We maintain disclosure controls and procedures, as defined in Rule 13a−15(e) promulgated under the Exchange Act, that are designed to ensure that information required to be disclosed by us in the reports that we file or submit under the Exchange Act is recorded, processed, summarized and reported within the time periods specified in the SEC’s rules and forms and that such information is accumulated and communicated to our management, including our Chief Executive Officer and Chief Financial Officer, as appropriate to allow timely decisions regarding required disclosure.

In connection with the filing of this Quarterly Report on Form 10-Q, an evaluation was carried out by our management, with the participation of our Chief Executive Officer and Chief Financial Officer, of the effectiveness of our disclosure controls and procedures. Our Chief Executive Officer and Chief Financial Officer concluded that our disclosure controls and procedures were not effective as of June 30, 2015 due to the material weakness in our internal control over financial reporting described in “Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations-Internal Control Over Financial Reporting.” 

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(b) Changes in Internal Controls over Financial Reporting.    This Quarterly Report on Form 10-Q does not include a report on changes in our internal controls over financial reporting that occurred during our most recent fiscal quarter due to a transition period established by the Exchange Act for new reporting companies.  Following identification of the material weakness referenced above, we implemented a number of controls and procedures designed to improve our control environment as described in “Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations-Internal Control Over Financial Reporting.”

PART II. OTHER INFORMATION

ITEM 1. LEGAL PROCEEDINGS

There have been no material changes in legal proceedings as described in our Annual Report on Form 10-K for the fiscal year ended September 30, 2014.

ITEM 1A. RISK FACTORS

During the quarter, we made no additions to the risk factors described in our Annual Report on Form 10-K for the fiscal year ended September 30, 2014.

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

Sales of Unregistered Equity Securities

None.

                        Purchases of Equity Securities

We did not repurchase any of our common stock during the second quarter of fiscal year 2015.

ITEM 3. DEFAULTS UPON SENIOR SECURITIES

None.

ITEM 4. MINE SAFETY DISCLOSURES

Not applicable.

ITEM 5. OTHER INFORMATION

Not applicable.

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INDEX TO EXHIBITS

Number	Description
2.1	Purchase and Assumption Agreement (Whole Bank, All Deposits), dated as of June 4, 2010, among Federal Deposit Insurance Corporation, Receiver of TierOne Bank, Lincoln, Nebraska, Federal Deposit Insurance Corporation and Great Western Bank (incorporated by reference to Exhibit 2.1 to the Registration Statement on Form S-1 filed by Great Western Bancorp, Inc. on August 28, 2014 (File No. 333-198458))
2.2	Agreement and Plan of Merger, dated October 8, 2014, of Great Western Bancorp, Inc. and Great Western Bancorporation, Inc.
3.1	Amended and Restated Certificate of Incorporation (incorporated by reference to Exhibit 3.1 to the Annual Report on Form 10-K for the fiscal year ended September 30, 2014 filed by Great Western Bancorp, Inc. on December 12, 2014)
3.2	Amended and Restated Bylaws (incorporated by reference to Exhibit 3.2 to the Registration Statement on Form S-1 filed by Great Western Bancorp, Inc. on August 28, 2014 (File No. 333-198458))
4.1	First Supplemental Indenture dated October 17, 2014, between Great Western Bancorporation, Inc., Great Western Bancorp, Inc. and U.S. Bank National Association (incorporated by reference to Exhibit 4.2 to the Annual Report on Form 10-K for the fiscal year ended September 30, 2014 filed by Great Western Bancorp, Inc. on December 12, 2014)
4.2	First Supplemental Indenture, dated October 17, 2014, between Great Western Bancorp, Inc. and LaSalle Bank National Association (incorporated by reference to Exhibit 4.5 to the Annual Report on Form 10-K for the fiscal year ended September 30, 2014 filed by Great Western Bancorp, Inc. on December 12, 2014)
4.3	Second Supplemental Indenture, dated October 17, 2014, between Great Western Bancorporation, Inc., Great Western Bancorp, Inc. and The Bank of New York Trust Company, National Association (incorporated by reference to Exhibit 4.9 to the Annual Report on Form 10-K for the fiscal year ended September 30, 2014 filed by Great Western Bancorp, Inc. on December 12, 2014)
4.4	Amended and Restated Credit Agreement, dated October 17, 2014, between Great Western Bancorporation, Inc. and National Australia Bank Limited (incorporated by reference to Exhibit 4.11 to the Annual Report on Form 10-K for the fiscal year ended September 30, 2014 filed by Great Western Bancorp, Inc. on December 12, 2014)
4.5	Assumption of Subordinated Note Due June 3, 2018, dated October 17, 2014, between Great Western Bancorp, Inc. and Great Western Bancorporation, Inc. (incorporated by reference to Exhibit 4.13 to the Annual Report on Form 10-K for the fiscal year ended September 30, 2014 filed by Great Western Bancorp, Inc. on December 12, 2014)
10.1	Stockholder Agreement, dated October 20, 2014, between National Australia Bank Limited and Great Western Bancorp, Inc. (incorporated by reference to Exhibit 10.1 to the Annual Report on Form 10-K for the fiscal year ended September 30, 2014 filed by Great Western Bancorp, Inc. on December 12, 2014)
10.2	Transitional Services Agreement, dated October 20, 2014, between National Australia Bank Limited and Great Western Bancorp, Inc. (incorporated by reference to Exhibit 10.2 to the Annual Report on Form 10-K for the fiscal year ended September 30, 2014 filed by Great Western Bancorp, Inc. on December 12, 2014)
10.3	First Amendment to the Transitional Services Agreement, dated November 15, 2014, between National Australia Bank Limited and Great Western Bancorp, Inc. (incorporated by reference to Exhibit 10.3 to the Annual Report on Form 10-K for the fiscal year ended September 30, 2014 filed by Great Western Bancorp, Inc. on December 12, 2014)

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10.4	Registration Rights Agreement, dated October 20, 2014, between National Australia Bank Limited, National Americas Holdings LLC and Great Western Bancorp, Inc. (incorporated by reference to Exhibit 10.4 to the Annual Report on Form 10-K for the fiscal year ended September 30, 2014 filed by Great Western Bancorp, Inc. on December 12, 2014)
10.5	Great Western Bancorp, Inc. 2014 Omnibus Incentive Compensation Plan (incorporated by reference to Exhibit 10.1 to the Registration Statement on Form S-8 filed by Great Western Bancorp, Inc. on October 16, 2014 (File No. 333-199426))
10.6	Great Western Bancorp, Inc. 2014 Non-Employee Director Plan (incorporated by reference to Exhibit 10.2 to the Registration Statement on Form S-8 filed by Great Western Bancorp, Inc. on October 16, 2014 (File No. 333-199426))
10.7	Great Western Bancorp, Inc. Executive Incentive Compensation Plan (incorporated by reference to Exhibit 10.13 to the Annual Report on Form 10-K for the fiscal year ended September 30, 2014 filed by Great Western Bancorp, Inc. on December 12, 2014)
10.8	Form of Great Western Bancorp, Inc. 2014 Omnibus Incentive Compensation Plan Performance Share Unit Award Agreement (incorporated by reference to Exhibit 10.13 to Amendment No. 2 to the Registration Statement on Form S-1 filed by Great Western Bancorp, Inc. on October 3, 2014 (File No. 333-198458))
10.9	Form of Great Western Bancorp, Inc. 2014 Omnibus Incentive Compensation Plan Restricted Share Unit Award Agreement (incorporated by reference to Exhibit 10.14 to Amendment No. 2 to the Registration Statement on Form S-1 filed by Great Western Bancorp, Inc. on October 3, 2014 (File No. 333-198458))
10.10	Form of Great Western Bancorp, Inc. 2014 Non-Employee Director Plan Performance Share Unit Award Agreement (incorporated by reference to Exhibit 10.16 to Amendment No. 3 to the Registration Statement on Form S-1 filed by Great Western Bancorp, Inc. on October 9, 2014 (File No. 333-198458))
10.11	Form of Great Western Bancorp, Inc. 2014 Non-Employee Director Plan Restricted Share Unit Award Agreement (incorporated by reference to Exhibit 10.15 to Amendment No. 2 to the Registration Statement on Form S-1 filed by Great Western Bancorp, Inc. on October 3, 2014 (File No. 333-198458))
11.1	Statement regarding Computation of Per Share Earnings (included as Note 18 to the registrant's unaudited consolidated financial statements)
31.1	Rule 13a-14(a) Certification of Chief Executive Officer of Great Western Bancorp, Inc. in accordance with Section 302 of the Sarbanes-Oxley Act of 2002
31.2	Rule 13a-14(a) Certification of Chief Financial Officer of Great Western Bancorp, Inc. in accordance with Section 302 of the Sarbanes-Oxley Act of 2002
32.1	Section 1350 Certification of Chief Executive Officer of Great Western Bancorp, Inc. in accordance with Section 906 of the Sarbanes-Oxley Act of 2002
32.2	Section 1350 Certification of Chief Financial Officer of Great Western Bancorp, Inc. in accordance with Section 906 of the Sarbanes-Oxley Act of 2002

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SIGNATURES

Pursuant to the requirements of Section 13 or 15(d) 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.

	Great Western Bancorp, Inc.
Date: August 13, 2015	By: ______/s/_Peter Chapman_________________ Name: Peter Chapman Title: Chief Financial Officer and Executive Vice President (Principal Financial Officer and Authorized Officer)

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EX-2.2

Exhibit 2.2

AGREEMENT AND PLAN OF MERGER

OF

GREAT WESTERN BANCORPORATION, INC.

WITH AND INTO

GREAT WESTERN BANCORP, INC.

Agreement and Plan of Merger, entered into as of 5:15 P.M. New York City time on October 8, 2014 (this “Agreement”), adopted and made by and between Great Western BANCORP, INC., a Delaware corporation having its main office at 100 North Phillips Avenue, Sioux Falls, South Dakota 57104 (“Parent”), and GREAT WESTERN BANCORPORATION, INC., an Iowa corporation having its main office at 100 North Phillips Avenue, Sioux Falls, South Dakota 57104 (the “Company”).

WITNESSETH:

WHEREAS, in preparation for its initial public offering of shares of its Common Stock, par value $0.01 per share, Parent desires to engage in a series of internal reorganization transactions, including the purchase of all issued and outstanding shares of the Company from National Americas Investment, Inc., a Delaware corporation (“NAI”), followed by the merger of the Company with and into Parent (the “Merger”), with Parent continuing as the surviving corporation; and

WHEREAS, the Merger is intended to be treated as a complete liquidation of the Company for United States federal income tax purposes within the meaning section 332 of the United States Internal Revenue Code of 1986, as amended.

NOW, THEREFORE, in consideration of the premises and of the mutual agreements herein contained, the parties hereto do hereby agree as follows:

Merger

Subject to the terms and conditions of this Agreement, upon the filing and effectiveness of the filing of Articles of Merger with the Secretary of State for the State of Iowa and the filing of a Certificate of Merger with the Secretary of State for the State of Delaware, or such other time as the parties hereto shall mutually agree (the “Effective Time”), the Company shall merge with and into Parent pursuant to the provisions of, and with the effect provided in, the General Corporation Law of the State of Delaware (the “DGCL”) and the Business Corporation Act of the State of Iowa (the “BCA”). At the Effective Time, the separate existence of the Company shall cease, and Parent shall continue as the surviving entity (the “Resultant Entity”). All assets of the Company as they exist at the Effective Time shall pass to and vest in the Resultant Entity without any conveyance or other transfer. The Resultant Entity shall be responsible for all of the liabilities of every kind and description of the Company existing as of the Effective Time.

Capital

At the Effective Time, without further action of the parties, the issued and outstanding shares of the Company shall be cancelled and retired, and no cash, new shares of common stock, or other property shall be delivered in exchange therefor. The shares of capital stock of Parent issued and outstanding immediately prior to the Effective Time shall, at the Effective Time, continue to be issued and outstanding and shall not be affected in any manner by the Merger.

Certificate of Incorporation and Bylaws; Board of Directors; Main Office

The Certificate of Incorporation and Bylaws of Parent in effect immediately prior to the Effective Time shall be the Certificate of Incorporation and the Bylaws of the Resultant Entity, in each case until amended in accordance with applicable law and the terms thereof.

At the Effective Time, the Board of Directors of Parent shall be the Board of Directors of the Resultant Entity.

The main office of the Resultant Entity shall be 100 North Phillips Avenue, Sioux Falls, South Dakota 57104.

Further Assurances

If at any time the Resultant Entity shall consider or be advised that any further assignments, conveyances or assurances are necessary or desirable to vest, perfect or confirm in the Resultant Entity title to any property or rights of the Company, or otherwise carry out the provisions hereof, the proper officers and directors of the Company and the officers of the Resultant Entity acting on behalf of the Company shall execute and deliver any and all proper assignments, conveyances and assurances, and do all things necessary or desirable to vest, perfect or confirm title to such property or rights in the Resultant Entity and otherwise carry out the provisions hereof.

Conditions Precedent

The Merger and the respective obligations of each party hereto to consummate the Merger are subject to the fulfillment or written waiver of the following conditions prior to the Effective Time:

No jurisdiction or governmental authority shall have enacted, issued, promulgated, enforced or entered any statute, rule, regulation, judgment, decree, injunction or other order (whether temporary, preliminary or permanent) which is in effect and prohibits consummation of the Merger;

The purchase by Parent of all issued and outstanding shares of common stock of the Company from NAI shall have been completed;

The prior approval of National Americas Holdings LLC, as stockholder of Parent, as required by the DGCL; and

The prior approval of Parent, as stockholder of the Company, shall have been obtained as required by the BCA.

Termination

Notwithstanding anything contained in this Agreement to the contrary, this Agreement may be terminated by the mutual consent of the parties hereto.

Amendment

Subject to applicable law, at any time prior to the Effective Time, the parties hereto may modify or amend this Agreement or waive any provision hereof by written instrument executed and delivered by duly authorized officers of the respective parties or, in the case of a waiver, by the party giving such waiver;

provided that this Agreement may not be amended following the approval of NAI as the sole shareholder of the Company to the extent prohibited by Section 490.1102(5) of the Iowa Business Corporation Act. This Agreement may not otherwise be amended or modified.

Miscellaneous

This Agreement (including the documents and instruments referred to herein and attached hereto) constitutes the entire agreement among the parties with respect to the subject matter hereof and supersedes all prior agreements and understandings, both written and oral, among the parties with respect to the subject matter hereof. This Agreement may be executed in counterparts (including by facsimile or other electronic means), each of which shall be deemed to be an original, but all of which shall constitute one and the same agreement. This Agreement shall be governed by and construed in accordance with the laws of the State of New York applicable to contracts made and to be performed entirely within that State, without regard to choice of law principles.

[Signature Page Follows]

IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be executed in counterparts by their duly authorized officers as of the date first written above.

GREAT WESTERN BANCORP, INC.
By:	/s/ Ken Karels
Name:	Ken Karels
Title:	President & CEO
GREAT WESTERN BANCORPORATION, INC.
By:	/s/ Peter Chapman
Name:	Peter Chapman
Title:	Vice President & Chief Financial Officer

EX-31.1

Exhibit 31.1

CERTIFICATION OF THE CHIEF EXECUTIVE OFFICER PURSUANT TO

SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002

I, Ken Karels, President and Chief Executive Officer of Great Western Bancorp, Inc., certify that:

1. I have reviewed this Quarterly Report on Form 10-Q of Great Western Bancorp, Inc.;

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)) 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) 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

(c) 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 (the registrant's fourth fiscal quarter in the case of an annual report) 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 control 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.

Date: February 12, 2015	By:	/s/ Ken Karels
	Name:	Ken Karels
	Title:	President and Chief Executive Officer

EX-31.2

Exhibit 31.2

CERTIFICATION OF THE CHIEF FINANCIAL OFFICER PURSUANT TO

SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002

I, Peter Chapman, Executive Vice President and Chief Financial Officer of Great Western Bancorp, Inc., certify that:

1. I have reviewed this Quarterly Report on Form 10-Q of Great Western Bancorp, Inc.;

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)) 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) 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

(c) 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 (the registrant's fourth fiscal quarter in the case of an annual report) 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 control 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.

Date: February 12, 2015	By:	/s/ Peter Chapman
	Name:	Peter Chapman
	Title:	Executive Vice President and Chief Financial 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 Great Western Bancorp, Inc. (the “Company”) on Form 10-Q for the period ended December 31, 2014 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Ken Karels, President and Chief Executive Officer of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that, to the best of my knowledge:

(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.

Date: February 12, 2015	By:	/s/ Ken Karels
	Name:	Ken Karels
	Title:	President and Chief Executive Officer

EX-32.2

Exhibit 32.2

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 Great Western Bancorp, Inc. (the “Company”) on Form 10-Q for the period ended December 31, 2014 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Peter Chapman, Executive Vice President and Chief Financial Officer of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that, to the best of my knowledge:

(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.

Date: February 12, 2015	By:	/s/ Peter Chapman
	Name:	Peter Chapman
	Title:	Executive Vice President and Chief Financial Officer

XML

Stock-Based Compensation (Tables)

9 Months Ended

Jun. 30, 2015

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

Schedule of Share-Based Compensation, Restricted Stock Units Award Activity

The following is a summary of the Plans’ restricted share and performance-based stock award activity as of June 30, 2015:

Restricted Shares	Common Shares		Weighted-Average Grant Date Fair Value
Restricted shares, October 1, 2014	—		$	—
Granted	81,419		18.18
Vested and issued	—		—
Forfeited	(556	)	18.00
Canceled	—		—
Restricted shares, June 30, 2015	80,863		$	18.18
Vested, but not issuable at June 30, 2015	12,221		$	18.00
Performance Shares
Performance shares, October 1, 2014	—		$	—
Granted	221,294		18.00
Vested and issued	—		—
Forfeited	(7,761	)	18.00
Canceled	—		—
Performance shares, June 30, 2015	213,533		$	18.00

XML

Loans - Impaired Financing Receivables (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Jun. 30, 2015	Sep. 30, 2014
Financing Receivable, Impaired [Line Items]
Recorded Investment	$ 211,518	$ 145,592
Unpaid Principal Balance	224,035	153,665
Related Allowance	16,109	9,679
Average Recorded Investment	177,055	160,781
Residential real estate
Financing Receivable, Impaired [Line Items]
Recorded Investment	12,481	12,107
Unpaid Principal Balance	12,678	12,737
Related Allowance	2,582	2,529
Average Recorded Investment	12,294	13,572
Commercial real estate
Financing Receivable, Impaired [Line Items]
Recorded Investment	77,015	62,155
Unpaid Principal Balance	78,947	64,597
Related Allowance	3,006	2,017
Average Recorded Investment	69,585	84,490
Commercial non real estate
Financing Receivable, Impaired [Line Items]
Recorded Investment	68,694	35,522
Unpaid Principal Balance	78,557	37,882
Related Allowance	6,733	3,927
Average Recorded Investment	50,608	31,827
Agriculture
Financing Receivable, Impaired [Line Items]
Recorded Investment	53,104	35,528
Unpaid Principal Balance	53,541	37,958
Related Allowance	3,743	1,155
Average Recorded Investment	44,316	30,546
Consumer
Financing Receivable, Impaired [Line Items]
Recorded Investment	224	280
Unpaid Principal Balance	312	491
Related Allowance	45	51
Average Recorded Investment	$ 252	$ 346

XML

Securities Available for Sale - Schedule of Gross Unrealized Losses (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Sep. 30, 2014
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Less than 12 months, Fair Value	$ 228,945	$ 122,969
12 months or more, Fair Value	507,944	730,171
Fair Value	736,889	853,140
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss [Abstract]
Less than 12 months, Unrealized	(1,777)	(299)
12 months or more, Unrealized	(6,828)	(14,462)
Unrealized	(8,605)	(14,761)
U.S. Treasury securities
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Less than 12 months, Fair Value	18,364	98,344
12 months or more, Fair Value	0	0
Fair Value	18,364	98,344
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss [Abstract]
Less than 12 months, Unrealized	(113)	(174)
12 months or more, Unrealized	0	0
Unrealized	(113)	(174)
U.S. Agency securities
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Less than 12 months, Fair Value	49,577	0
12 months or more, Fair Value	0	0
Fair Value	49,577	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss [Abstract]
Less than 12 months, Unrealized	(57)	0
12 months or more, Unrealized	0	0
Unrealized	(57)	0
Mortgage-backed securities
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Less than 12 months, Fair Value	161,004	24,625
12 months or more, Fair Value	507,944	730,171
Fair Value	668,948	754,796
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss [Abstract]
Less than 12 months, Unrealized	(1,607)	(125)
12 months or more, Unrealized	(6,828)	(14,462)
Unrealized	$ (8,435)	$ (14,587)

XML

Core Deposits and Other Intangibles - Intangible Assets Amortization Expense (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Sep. 30, 2014
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	$ 117,232	$ 117,232
Accumulated amortization	(109,405)	(103,003)
Core deposits and other intangibles	7,827	14,229
Core Deposit Intangible
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	92,679	92,679
Accumulated amortization	(91,980)	(87,423)
Core deposits and other intangibles	699	5,256
Brand Intangible
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	8,464	8,464
Accumulated amortization	(3,995)	(3,572)
Core deposits and other intangibles	4,469	4,892
Customer Relationships Intangible
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	16,089	16,089
Accumulated amortization	(13,430)	(12,008)
Core deposits and other intangibles	$ 2,659	$ 4,081

XML

Loans - Troubled Debt Restructurings on Accruing and Nonaccrual Financing Receivables (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2015 USD ($) contract	Jun. 30, 2014 USD ($) contract	Jun. 30, 2015 USD ($) contract	Jun. 30, 2014 USD ($) contract	Sep. 30, 2014 USD ($)
Accruing
Financing Receivable, Modifications [Line Items]
Recorded value of TDR balance	$ 54,916		$ 54,916		$ 36,857
Financing receivable, modifications, number of contracts | contract	3	6	20	24
Financing receivable, modifications, pre-modification recorded investment	$ 627	$ 4,150	$ 28,584	$ 8,267
Financing receivable, modifications, post-modification recorded investment	$ 627	$ 4,150	$ 28,494	$ 8,267
Change in recorded investment due to principal paydown at time of modification, number of contracts | contract	0	0	0	0
Change in recorded investment due to principal paydown at time of modification, pre-modification	$ 0	$ 0	$ 0	$ 0
Change in recorded investment due to principal paydown at time of modification, post-modification	$ 0	$ 0	$ 0	$ 0
Change in recorded investment due to chargeoffs at time of modification, number of contracts | contract	0	0	1	0
Change in recorded investment due to chargeoffs at time of modification, pre-modification	$ 0	$ 0	$ 90	$ 0
Change in recorded investment due to chargeoffs at time of modification, post-modification	0	$ 0	0	$ 0
Accruing | Residential real estate
Financing Receivable, Modifications [Line Items]
Recorded value of TDR balance	$ 668		$ 668		1,112
Financing receivable, modifications, number of contracts | contract	1	1	3	5
Financing receivable, modifications, pre-modification recorded investment	$ 35	$ 35	$ 71	$ 254
Financing receivable, modifications, post-modification recorded investment	35	$ 35	71	$ 254
Accruing | Commercial real estate
Financing Receivable, Modifications [Line Items]
Recorded value of TDR balance	$ 44,170		$ 44,170		25,177
Financing receivable, modifications, number of contracts | contract	1	1	9	2
Financing receivable, modifications, pre-modification recorded investment	$ 574	$ 1,841	$ 23,704	$ 2,911
Financing receivable, modifications, post-modification recorded investment	574	$ 1,841	23,614	$ 2,911
Accruing | Commercial non real estate
Financing Receivable, Modifications [Line Items]
Recorded value of TDR balance	$ 9,961		$ 9,961		6,753
Financing receivable, modifications, number of contracts | contract	0	3	6	12
Financing receivable, modifications, pre-modification recorded investment	$ 0	$ 2,263	$ 4,785	$ 5,059
Financing receivable, modifications, post-modification recorded investment	0	$ 2,263	4,785	$ 5,059
Accruing | Agriculture
Financing Receivable, Modifications [Line Items]
Recorded value of TDR balance	$ 80		$ 80		3,780
Financing receivable, modifications, number of contracts | contract	0	0	0	0
Financing receivable, modifications, pre-modification recorded investment	$ 0	$ 0	$ 0	$ 0
Financing receivable, modifications, post-modification recorded investment	0	$ 0	0	$ 0
Accruing | Consumer
Financing Receivable, Modifications [Line Items]
Recorded value of TDR balance	$ 37		$ 37		35
Financing receivable, modifications, number of contracts | contract	1	1	2	5
Financing receivable, modifications, pre-modification recorded investment	$ 18	$ 11	$ 24	$ 43
Financing receivable, modifications, post-modification recorded investment	$ 18	$ 11	$ 24	$ 43
Accruing | Rate modification | Residential real estate
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, number of contracts | contract	0	0	1	0
Financing receivable, modifications, pre-modification recorded investment	$ 0	$ 0	$ 15	$ 0
Financing receivable, modifications, post-modification recorded investment	$ 0	$ 0	$ 15	$ 0
Accruing | Rate modification | Commercial real estate
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, number of contracts | contract	0	0	0	0
Financing receivable, modifications, pre-modification recorded investment	$ 0	$ 0	$ 0	$ 0
Financing receivable, modifications, post-modification recorded investment	$ 0	$ 0	$ 0	$ 0
Accruing | Rate modification | Commercial non real estate
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, number of contracts | contract	0	0	1	0
Financing receivable, modifications, pre-modification recorded investment	$ 0	$ 0	$ 32	$ 0
Financing receivable, modifications, post-modification recorded investment	$ 0	$ 0	$ 32	$ 0
Accruing | Rate modification | Agriculture
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, number of contracts | contract	0	0	0	0
Financing receivable, modifications, pre-modification recorded investment	$ 0	$ 0	$ 0	$ 0
Financing receivable, modifications, post-modification recorded investment	$ 0	$ 0	$ 0	$ 0
Accruing | Rate modification | Consumer
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, number of contracts | contract	0	0	0	0
Financing receivable, modifications, pre-modification recorded investment	$ 0	$ 0	$ 0	$ 0
Financing receivable, modifications, post-modification recorded investment	$ 0	$ 0	$ 0	$ 0
Accruing | Term extension | Residential real estate
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, number of contracts | contract	1	0	1	2
Financing receivable, modifications, pre-modification recorded investment	$ 35	$ 0	$ 35	$ 74
Financing receivable, modifications, post-modification recorded investment	$ 35	$ 0	$ 35	$ 74
Accruing | Term extension | Commercial real estate
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, number of contracts | contract	1	0	2	0
Financing receivable, modifications, pre-modification recorded investment	$ 574	$ 0	$ 664	$ 0
Financing receivable, modifications, post-modification recorded investment	$ 574	$ 0	$ 574	$ 0
Accruing | Term extension | Commercial non real estate
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, number of contracts | contract	0	1	3	5
Financing receivable, modifications, pre-modification recorded investment	$ 0	$ 79	$ 2,879	$ 1,813
Financing receivable, modifications, post-modification recorded investment	$ 0	$ 79	$ 2,879	$ 1,813
Accruing | Term extension | Agriculture
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, number of contracts | contract	0	0	0	0
Financing receivable, modifications, pre-modification recorded investment	$ 0	$ 0	$ 0	$ 0
Financing receivable, modifications, post-modification recorded investment	$ 0	$ 0	$ 0	$ 0
Accruing | Term extension | Consumer
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, number of contracts | contract	0	0	0	0
Financing receivable, modifications, pre-modification recorded investment	$ 0	$ 0	$ 0	$ 0
Financing receivable, modifications, post-modification recorded investment	$ 0	$ 0	$ 0	$ 0
Accruing | Payment modification | Residential real estate
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, number of contracts | contract	0	1	0	2
Financing receivable, modifications, pre-modification recorded investment	$ 0	$ 35	$ 0	$ 50
Financing receivable, modifications, post-modification recorded investment	$ 0	$ 35	$ 0	$ 50
Accruing | Payment modification | Commercial real estate
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, number of contracts | contract	0	1	6	2
Financing receivable, modifications, pre-modification recorded investment	$ 0	$ 1,841	$ 22,542	$ 2,911
Financing receivable, modifications, post-modification recorded investment	$ 0	$ 1,841	$ 22,542	$ 2,911
Accruing | Payment modification | Commercial non real estate
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, number of contracts | contract	0	1	2	5
Financing receivable, modifications, pre-modification recorded investment	$ 0	$ 2,182	$ 1,874	$ 2,917
Financing receivable, modifications, post-modification recorded investment	$ 0	$ 2,182	$ 1,874	$ 2,917
Accruing | Payment modification | Agriculture
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, number of contracts | contract	0	0	0	0
Financing receivable, modifications, pre-modification recorded investment	$ 0	$ 0	$ 0	$ 0
Financing receivable, modifications, post-modification recorded investment	$ 0	$ 0	$ 0	$ 0
Accruing | Payment modification | Consumer
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, number of contracts | contract	1	1	1	3
Financing receivable, modifications, pre-modification recorded investment	$ 18	$ 11	$ 18	$ 15
Financing receivable, modifications, post-modification recorded investment	$ 18	$ 11	$ 18	$ 15
Accruing | Bankruptcy | Residential real estate
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, number of contracts | contract	0	0	0	1
Financing receivable, modifications, pre-modification recorded investment	$ 0	$ 0	$ 0	$ 130
Financing receivable, modifications, post-modification recorded investment	$ 0	$ 0	$ 0	$ 130
Accruing | Bankruptcy | Commercial real estate
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, number of contracts | contract	0	0	1	0
Financing receivable, modifications, pre-modification recorded investment	$ 0	$ 0	$ 498	$ 0
Financing receivable, modifications, post-modification recorded investment	$ 0	$ 0	$ 498	$ 0
Accruing | Bankruptcy | Commercial non real estate
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, number of contracts | contract	0	0	0	0
Financing receivable, modifications, pre-modification recorded investment	$ 0	$ 0	$ 0	$ 0
Financing receivable, modifications, post-modification recorded investment	$ 0	$ 0	$ 0	$ 0
Accruing | Bankruptcy | Agriculture
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, number of contracts | contract	0	0	0	0
Financing receivable, modifications, pre-modification recorded investment	$ 0	$ 0	$ 0	$ 0
Financing receivable, modifications, post-modification recorded investment	$ 0	$ 0	$ 0	$ 0
Accruing | Bankruptcy | Consumer
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, number of contracts | contract	0	0	1	0
Financing receivable, modifications, pre-modification recorded investment	$ 0	$ 0	$ 6	$ 0
Financing receivable, modifications, post-modification recorded investment	$ 0	$ 0	$ 6	$ 0
Accruing | Other | Residential real estate
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, number of contracts | contract	0	0	1	0
Financing receivable, modifications, pre-modification recorded investment	$ 0	$ 0	$ 21	$ 0
Financing receivable, modifications, post-modification recorded investment	$ 0	$ 0	$ 21	$ 0
Accruing | Other | Commercial real estate
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, number of contracts | contract	0	0	0	0
Financing receivable, modifications, pre-modification recorded investment	$ 0	$ 0	$ 0	$ 0
Financing receivable, modifications, post-modification recorded investment	$ 0	$ 0	$ 0	$ 0
Accruing | Other | Commercial non real estate
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, number of contracts | contract	0	1	0	2
Financing receivable, modifications, pre-modification recorded investment	$ 0	$ 2	$ 0	$ 329
Financing receivable, modifications, post-modification recorded investment	$ 0	$ 2	$ 0	$ 329
Accruing | Other | Agriculture
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, number of contracts | contract	0	0	0	0
Financing receivable, modifications, pre-modification recorded investment	$ 0	$ 0	$ 0	$ 0
Financing receivable, modifications, post-modification recorded investment	$ 0	$ 0	$ 0	$ 0
Accruing | Other | Consumer
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, number of contracts | contract	0	0	0	2
Financing receivable, modifications, pre-modification recorded investment	$ 0	$ 0	$ 0	$ 28
Financing receivable, modifications, post-modification recorded investment	0	$ 0	0	$ 28
Nonaccrual
Financing Receivable, Modifications [Line Items]
Recorded value of TDR balance	$ 14,764		$ 14,764		20,415
Financing receivable, modifications, number of contracts | contract	6	3	15	29
Financing receivable, modifications, pre-modification recorded investment	$ 126	$ 55	$ 568	$ 5,238
Financing receivable, modifications, post-modification recorded investment	$ 34	$ 55	$ 476	$ 5,238
Change in recorded investment due to principal paydown at time of modification, number of contracts | contract	0	0	0	0
Change in recorded investment due to principal paydown at time of modification, pre-modification	$ 0	$ 0	$ 0	$ 0
Change in recorded investment due to principal paydown at time of modification, post-modification	$ 0	$ 0	$ 0	$ 0
Change in recorded investment due to chargeoffs at time of modification, number of contracts | contract	2	0	2	0
Change in recorded investment due to chargeoffs at time of modification, pre-modification	$ 92	$ 0	$ 92	$ 0
Change in recorded investment due to chargeoffs at time of modification, post-modification	0	$ 0	0	$ 0
Nonaccrual | Residential real estate
Financing Receivable, Modifications [Line Items]
Recorded value of TDR balance	$ 1,536		$ 1,536		1,730
Financing receivable, modifications, number of contracts | contract	3	2	7	10
Financing receivable, modifications, pre-modification recorded investment	$ 44	$ 19	$ 268	$ 177
Financing receivable, modifications, post-modification recorded investment	29	$ 19	253	$ 177
Nonaccrual | Commercial real estate
Financing Receivable, Modifications [Line Items]
Recorded value of TDR balance	$ 4,680		$ 4,680		6,884
Financing receivable, modifications, number of contracts | contract	0	0	0	5
Financing receivable, modifications, pre-modification recorded investment	$ 0	$ 0	$ 0	$ 4,618
Financing receivable, modifications, post-modification recorded investment	0	$ 0	0	$ 4,618
Nonaccrual | Commercial non real estate
Financing Receivable, Modifications [Line Items]
Recorded value of TDR balance	$ 1,101		$ 1,101		1,785
Financing receivable, modifications, number of contracts | contract	2	1	6	10
Financing receivable, modifications, pre-modification recorded investment	$ 81	$ 36	$ 298	$ 171
Financing receivable, modifications, post-modification recorded investment	4	$ 36	221	$ 171
Nonaccrual | Agriculture
Financing Receivable, Modifications [Line Items]
Recorded value of TDR balance	$ 7,440		$ 7,440		9,994
Financing receivable, modifications, number of contracts | contract	0	0	0	2
Financing receivable, modifications, pre-modification recorded investment	$ 0	$ 0	$ 0	$ 260
Financing receivable, modifications, post-modification recorded investment	0	$ 0	0	$ 260
Nonaccrual | Consumer
Financing Receivable, Modifications [Line Items]
Recorded value of TDR balance	$ 7		$ 7		$ 22
Financing receivable, modifications, number of contracts | contract	1	0	2	2
Financing receivable, modifications, pre-modification recorded investment	$ 1	$ 0	$ 2	$ 12
Financing receivable, modifications, post-modification recorded investment	$ 1	$ 0	$ 2	$ 12
Nonaccrual | Rate modification | Residential real estate
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, number of contracts | contract	0	0	2	4
Financing receivable, modifications, pre-modification recorded investment	$ 0	$ 0	$ 104	$ 98
Financing receivable, modifications, post-modification recorded investment	$ 0	$ 0	$ 104	$ 98
Nonaccrual | Rate modification | Commercial real estate
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, number of contracts | contract	0	0	0	2
Financing receivable, modifications, pre-modification recorded investment	$ 0	$ 0	$ 0	$ 500
Financing receivable, modifications, post-modification recorded investment	$ 0	$ 0	$ 0	$ 500
Nonaccrual | Rate modification | Commercial non real estate
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, number of contracts | contract	0	0	0	0
Financing receivable, modifications, pre-modification recorded investment	$ 0	$ 0	$ 0	$ 0
Financing receivable, modifications, post-modification recorded investment	$ 0	$ 0	$ 0	$ 0
Nonaccrual | Rate modification | Agriculture
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, number of contracts | contract	0	0	0	0
Financing receivable, modifications, pre-modification recorded investment	$ 0	$ 0	$ 0	$ 0
Financing receivable, modifications, post-modification recorded investment	$ 0	$ 0	$ 0	$ 0
Nonaccrual | Rate modification | Consumer
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, number of contracts | contract	0	0	0	0
Financing receivable, modifications, pre-modification recorded investment	$ 0	$ 0	$ 0	$ 0
Financing receivable, modifications, post-modification recorded investment	$ 0	$ 0	$ 0	$ 0
Nonaccrual | Term extension | Residential real estate
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, number of contracts | contract	1	1	2	3
Financing receivable, modifications, pre-modification recorded investment	$ 0	$ 8	$ 77	$ 26
Financing receivable, modifications, post-modification recorded investment	$ 0	$ 8	$ 77	$ 26
Nonaccrual | Term extension | Commercial real estate
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, number of contracts | contract	0	0	0	2
Financing receivable, modifications, pre-modification recorded investment	$ 0	$ 0	$ 0	$ 4,031
Financing receivable, modifications, post-modification recorded investment	$ 0	$ 0	$ 0	$ 4,031
Nonaccrual | Term extension | Commercial non real estate
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, number of contracts | contract	1	0	5	8
Financing receivable, modifications, pre-modification recorded investment	$ 77	$ 0	$ 294	$ 125
Financing receivable, modifications, post-modification recorded investment	$ 0	$ 0	$ 217	$ 125
Nonaccrual | Term extension | Agriculture
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, number of contracts | contract	0	0	0	2
Financing receivable, modifications, pre-modification recorded investment	$ 0	$ 0	$ 0	$ 260
Financing receivable, modifications, post-modification recorded investment	$ 0	$ 0	$ 0	$ 260
Nonaccrual | Term extension | Consumer
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, number of contracts | contract	1	0	2	1
Financing receivable, modifications, pre-modification recorded investment	$ 1	$ 0	$ 2	$ 11
Financing receivable, modifications, post-modification recorded investment	$ 1	$ 0	$ 2	$ 11
Nonaccrual | Payment modification | Residential real estate
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, number of contracts | contract	1	1	1	1
Financing receivable, modifications, pre-modification recorded investment	$ 19	$ 11	$ 19	$ 11
Financing receivable, modifications, post-modification recorded investment	$ 19	$ 11	$ 19	$ 11
Nonaccrual | Payment modification | Commercial real estate
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, number of contracts | contract	0	0	0	0
Financing receivable, modifications, pre-modification recorded investment	$ 0	$ 0	$ 0	$ 0
Financing receivable, modifications, post-modification recorded investment	$ 0	$ 0	$ 0	$ 0
Nonaccrual | Payment modification | Commercial non real estate
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, number of contracts | contract	1	1	1	1
Financing receivable, modifications, pre-modification recorded investment	$ 4	$ 36	$ 4	$ 36
Financing receivable, modifications, post-modification recorded investment	$ 4	$ 36	$ 4	$ 36
Nonaccrual | Payment modification | Agriculture
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, number of contracts | contract	0	0	0	0
Financing receivable, modifications, pre-modification recorded investment	$ 0	$ 0	$ 0	$ 0
Financing receivable, modifications, post-modification recorded investment	$ 0	$ 0	$ 0	$ 0
Nonaccrual | Payment modification | Consumer
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, number of contracts | contract	0	0	0	0
Financing receivable, modifications, pre-modification recorded investment	$ 0	$ 0	$ 0	$ 0
Financing receivable, modifications, post-modification recorded investment	$ 0	$ 0	$ 0	$ 0
Nonaccrual | Bankruptcy | Residential real estate
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, number of contracts | contract	0	0	1	1
Financing receivable, modifications, pre-modification recorded investment	$ 0	$ 0	$ 43	$ 4
Financing receivable, modifications, post-modification recorded investment	$ 0	$ 0	$ 43	$ 4
Nonaccrual | Bankruptcy | Commercial real estate
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, number of contracts | contract	0	0	0	0
Financing receivable, modifications, pre-modification recorded investment	$ 0	$ 0	$ 0	$ 0
Financing receivable, modifications, post-modification recorded investment	$ 0	$ 0	$ 0	$ 0
Nonaccrual | Bankruptcy | Commercial non real estate
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, number of contracts | contract	0	0	0	1
Financing receivable, modifications, pre-modification recorded investment	$ 0	$ 0	$ 0	$ 10
Financing receivable, modifications, post-modification recorded investment	$ 0	$ 0	$ 0	$ 10
Nonaccrual | Bankruptcy | Agriculture
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, number of contracts | contract	0	0	0	0
Financing receivable, modifications, pre-modification recorded investment	$ 0	$ 0	$ 0	$ 0
Financing receivable, modifications, post-modification recorded investment	$ 0	$ 0	$ 0	$ 0
Nonaccrual | Bankruptcy | Consumer
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, number of contracts | contract	0	0	0	0
Financing receivable, modifications, pre-modification recorded investment	$ 0	$ 0	$ 0	$ 0
Financing receivable, modifications, post-modification recorded investment	$ 0	$ 0	$ 0	$ 0
Nonaccrual | Other | Residential real estate
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, number of contracts | contract	1	0	1	1
Financing receivable, modifications, pre-modification recorded investment	$ 25	$ 0	$ 25	$ 38
Financing receivable, modifications, post-modification recorded investment	$ 10	$ 0	$ 10	$ 38
Nonaccrual | Other | Commercial real estate
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, number of contracts | contract	0	0	0	1
Financing receivable, modifications, pre-modification recorded investment	$ 0	$ 0	$ 0	$ 87
Financing receivable, modifications, post-modification recorded investment	$ 0	$ 0	$ 0	$ 87
Nonaccrual | Other | Commercial non real estate
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, number of contracts | contract	0	0	0	0
Financing receivable, modifications, pre-modification recorded investment	$ 0	$ 0	$ 0	$ 0
Financing receivable, modifications, post-modification recorded investment	$ 0	$ 0	$ 0	$ 0
Nonaccrual | Other | Agriculture
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, number of contracts | contract	0	0	0	0
Financing receivable, modifications, pre-modification recorded investment	$ 0	$ 0	$ 0	$ 0
Financing receivable, modifications, post-modification recorded investment	$ 0	$ 0	$ 0	$ 0
Nonaccrual | Other | Consumer
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, number of contracts | contract	0	0	0	1
Financing receivable, modifications, pre-modification recorded investment	$ 0	$ 0	$ 0	$ 1
Financing receivable, modifications, post-modification recorded investment	$ 0	$ 0	$ 0	$ 1

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Income Taxes - Reconciliation of Income Tax Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Income Tax Disclosure [Abstract]
Federal	$ 5,600	$ 16,800	$ 29,611	$ 43,760
State	2,098	2,588	5,575	6,545
Current income tax expense (benefit)	7,698	19,388	35,186	50,305
Deferred tax (benefit) expense	7,173	(7,254)	3,107	(8,743)
Income tax expense	$ 14,871	$ 12,134	$ 38,293	$ 41,562

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Securities Available for Sale - Amortized Cost and Fair Value (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Sep. 30, 2014
Available-for-sale Securities, Fair Value to Amortized Cost Basis [Abstract]
Amortized Cost	$ 1,413,255	$ 1,351,157
Gross Unrealized Gains	5,825	4,846
Gross Unrealized Losses	(8,605)	(14,761)
Fair Value	1,410,475	1,341,242
U.S. Treasury securities
Available-for-sale Securities, Fair Value to Amortized Cost Basis [Abstract]
Amortized Cost	300,501	222,868
Gross Unrealized Gains	2,744	31
Gross Unrealized Losses	(113)	(174)
Fair Value	303,132	222,725
U.S. Agency securities
Available-for-sale Securities, Fair Value to Amortized Cost Basis [Abstract]
Amortized Cost	74,379	0
Gross Unrealized Gains	53	0
Gross Unrealized Losses	(57)	0
Fair Value	74,375	0
States and political subdivision securities
Available-for-sale Securities, Fair Value to Amortized Cost Basis [Abstract]
Amortized Cost	1,864	2,188
Gross Unrealized Gains	0	1
Gross Unrealized Losses	0	0
Fair Value	1,864	2,189
Corporate debt securities
Available-for-sale Securities, Fair Value to Amortized Cost Basis [Abstract]
Amortized Cost	4,996	11,732
Gross Unrealized Gains	34	141
Gross Unrealized Losses	0	0
Fair Value	5,030	11,873
Other
Available-for-sale Securities, Fair Value to Amortized Cost Basis [Abstract]
Amortized Cost	1,006	1,006
Gross Unrealized Gains	42	34
Gross Unrealized Losses	0	0
Fair Value	1,048	1,040
Government National Mortgage Association | Mortgage backed-securities, Issued by US Government
Available-for-sale Securities, Fair Value to Amortized Cost Basis [Abstract]
Amortized Cost	905,660	1,113,363
Gross Unrealized Gains	2,952	4,639
Gross Unrealized Losses	(7,055)	(14,587)
Fair Value	901,557	1,103,415
Federal National Mortgage Association | Mortgage backed-securities, Issued by US Government
Available-for-sale Securities, Fair Value to Amortized Cost Basis [Abstract]
Amortized Cost	47,727	0
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(377)	0
Fair Value	47,350	0
Small Business Assistance Program | Mortgage backed-securities, Issued by US Government
Available-for-sale Securities, Fair Value to Amortized Cost Basis [Abstract]
Amortized Cost	77,122	0
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(1,003)	0
Fair Value	$ 76,119	$ 0

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Derivative Financial Instruments (Tables)

9 Months Ended

Jun. 30, 2015

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule of Derivative Positions, Notional Amounts

The following table summarizes the notional amounts and estimated fair values of the Company’s derivative instruments at June 30, 2015 and September 30, 2014 (in thousands).

	June 30, 2015
	Notional Amount		Balance Sheet Location	Positive Fair Value		Negative Fair Value
Derivatives not designated as hedging instruments:
Interest rate swaps	$	1,065,703	Liabilities	$	2,867	$	(27,292	)
Mortgage loan commitments	33,626		Assets	1		—
Mortgage loan forward sale contracts	38,882		Liabilities	—		(1		)

	September 30, 2014
	Notional Amount		Balance Sheet Location	Positive Fair Value		Negative Fair Value
Derivatives not designated as hedging instruments:
Interest rate swaps	$	986,440	Liabilities	$	6,213	$	(19,286	)
Mortgage loan commitments	22,563		Assets	19		—
Mortgage loan forward sale contracts	28,459		Liabilities	—		(19		)

Schedule of Derivative Instruments, Effect on Other Comprehensive Income

The effect of derivatives on the consolidated statements of comprehensive income for the three and nine months ended June 30, 2015 and 2014 (in thousands) was as follows:

		Amount of Gain (Loss) Recognized in Income
		Three Months Ended June 30,						Nine Months Ended June 30,
	Location of Gain (Loss) Recognized in Income	2015			2014			2015			2014
Derivatives not designated as hedging instruments:
Interest rate swaps	Noninterest income	$	18,946		$	(17,797	)	$	(27,357	)	$	(25,396	)
Mortgage loan commitments	Noninterest income	(26		)	6			1			40
Mortgage loan forward sale contracts	Noninterest income	26			(6		)	(1		)	(40		)

Summary of Offsetting Assets

The following tables (in thousands) present the Company's gross derivative financial assets and liabilities at June 30, 2015 and September 30, 2014, and the related impact of enforceable master netting arrangements and cash collateral, where applicable:

	Gross Amount			Amount Offset			Net Amount Presented in Consolidated Balance Sheets			Held/Pledged Financial Instruments1		Net Amount
June 30, 2015
Derivative financial assets:
Derivatives subject to master netting arrangement or similar arrangement	$	2,867		$	(2,867	)	$	—		$	—	$	—
Derivative financial liabilities:
Derivatives subject to master netting arrangement or similar arrangement	(27,292		)	2,867			(24,425		)	24,425		—
Total derivative financial liabilities	$	(24,425	)	$	—		$	(24,425	)	$	24,425	$	—

¹ The actual amount of collateral exceeds the fair value exposure, at the individual counterparty level, as of the date presented.

	Gross Amount			Amount Offset			Net Amount Presented in Consolidated Balance Sheets			Held/Pledged Financial Instruments		Net Amount
September 30, 2014
Derivative financial assets:
Derivatives subject to master netting arrangement or similar arrangement	$	6,213		$	(6,213	)	$	—		$	—	$	—
Derivative financial liabilities:
Derivatives subject to master netting arrangement or similar arrangement	(19,286		)	6,213			(13,073		)	13,073		—
Total derivative financial liabilities	$	(13,073	)	$	—		$	(13,073	)	$	13,073	$	—

Summary of Offsetting Liabilities

The following tables (in thousands) present the Company's gross derivative financial assets and liabilities at June 30, 2015 and September 30, 2014, and the related impact of enforceable master netting arrangements and cash collateral, where applicable:

	Gross Amount			Amount Offset			Net Amount Presented in Consolidated Balance Sheets			Held/Pledged Financial Instruments1		Net Amount
June 30, 2015
Derivative financial assets:
Derivatives subject to master netting arrangement or similar arrangement	$	2,867		$	(2,867	)	$	—		$	—	$	—
Derivative financial liabilities:
Derivatives subject to master netting arrangement or similar arrangement	(27,292		)	2,867			(24,425		)	24,425		—
Total derivative financial liabilities	$	(24,425	)	$	—		$	(24,425	)	$	24,425	$	—

¹ The actual amount of collateral exceeds the fair value exposure, at the individual counterparty level, as of the date presented.

	Gross Amount			Amount Offset			Net Amount Presented in Consolidated Balance Sheets			Held/Pledged Financial Instruments		Net Amount
September 30, 2014
Derivative financial assets:
Derivatives subject to master netting arrangement or similar arrangement	$	6,213		$	(6,213	)	$	—		$	—	$	—
Derivative financial liabilities:
Derivatives subject to master netting arrangement or similar arrangement	(19,286		)	6,213			(13,073		)	13,073		—
Total derivative financial liabilities	$	(13,073	)	$	—		$	(13,073	)	$	13,073	$	—

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Income Taxes - Schedule of Effective Income Tax Rate Reconciliation (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Income Tax Disclosure [Abstract]
Income tax percentage	35.00%	35.00%	35.00%	35.00%
Computed “expected” tax expense (35%)	$ 15,296	$ 12,122	$ 39,741	$ 41,523
Tax exempt interest income	(1,573)	(1,263)	(4,789)	(3,539)
State income taxes, net of federal benefit	1,363	1,682	3,623	4,254
Other	(215)	(407)	(282)	(676)
Income tax expense	$ 14,871	$ 12,134	$ 38,293	$ 41,562

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Securities Sold Under Agreements to Repurchase - Maturity Schedule of Agreements (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Sep. 30, 2014
Assets Sold under Agreements to Repurchase [Line Items]
Total repurchase agreements	$ 161,559	$ 161,687
US Treasury and agency securities [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Total repurchase agreements	52,402	8,469
Mortgage-backed securities
Assets Sold under Agreements to Repurchase [Line Items]
Total repurchase agreements	109,157	153,218
Overnight and Continuous [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Total repurchase agreements	158,611	157,980
Overnight and Continuous [Member] | US Treasury and agency securities [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Total repurchase agreements	52,402	8,469
Overnight and Continuous [Member] | Mortgage-backed securities
Assets Sold under Agreements to Repurchase [Line Items]
Total repurchase agreements	106,209	149,511
Up to 30 days [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Total repurchase agreements	0	0
Up to 30 days [Member] | US Treasury and agency securities [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Total repurchase agreements	0	0
Up to 30 days [Member] | Mortgage-backed securities
Assets Sold under Agreements to Repurchase [Line Items]
Total repurchase agreements	0	0
30 to 90 Days [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Total repurchase agreements	0	0
30 to 90 Days [Member] | US Treasury and agency securities [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Total repurchase agreements	0	0
30 to 90 Days [Member] | Mortgage-backed securities
Assets Sold under Agreements to Repurchase [Line Items]
Total repurchase agreements	0	0
Greater than 90 days [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Total repurchase agreements	2,948	3,707
Greater than 90 days [Member] | US Treasury and agency securities [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Total repurchase agreements	0	0
Greater than 90 days [Member] | Mortgage-backed securities
Assets Sold under Agreements to Repurchase [Line Items]
Total repurchase agreements	$ 2,948	$ 3,707

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Fair Value of Financial Instruments - Schedule of Balance Sheet Grouping Fair Value (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Sep. 30, 2014
Level 1 | Carrying Amount
Assets
Cash and due from banks	$ 187,171	$ 256,639
Level 1 | Fair Value
Assets
Cash and due from banks	187,171	256,639
Level 2 | Carrying Amount
Assets
Accrued interest receivable	39,528	42,609
Federal Home Loan Bank stock	36,287	35,922
Liabilities
FHLB advances, related party notes payable, and other borrowings	631,815	616,389
Securities sold under repurchase agreements	161,559	161,687
Accrued interest payable	4,211	5,273
Subordinated debentures	56,083	56,083
Level 2 | Fair Value
Assets
Accrued interest receivable	39,528	42,609
Federal Home Loan Bank stock	36,287	35,922
Liabilities
FHLB advances, related party notes payable, and other borrowings	624,431	604,615
Securities sold under repurchase agreements	161,559	161,687
Accrued interest payable	4,211	5,273
Subordinated debentures	56,071	56,084
Level 3 | Carrying Amount
Assets
Loans, net excluding fair valued loans and loans held for sale	6,116,471	5,744,157
Liabilities
Deposits	7,357,688	7,052,180
Level 3 | Fair Value
Assets
Loans, net excluding fair valued loans and loans held for sale	6,099,234	5,734,274
Liabilities
Deposits	$ 7,384,060	$ 7,057,591

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Allowance for Loan Losses - (Narrative) (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Jun. 30, 2015	Sep. 30, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and written loan commitments at fair value under the fair value option	$ 1,063,665	$ 985,411
Loan held for sale	9,173	10,381
Guaranteed loans	108,600	106,500
Unfunded loan commitment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	$ 400	$ 400

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FHLB Advances, Related Party Notes Payable and Other Borrowings - Schedule of Due or Callable Notes (Details) - FHLB Advances and Related Party Notes Payable $ in Thousands	Jun. 30, 2015 USD ($)
Debt Instrument [Line Items]
Remaining in 2015	$ 6,020
2016	90,000
2017	25,000
2018	60,795
2019	50,000
2020 and thereafter	400,000
Total	$ 631,815

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Fair Value of Financial Instruments - Schedule of Other Available-for-Sale (Details) - Available-for-sale securities - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning Balance	$ 1,958	$ 2,243	$ 2,029	$ 2,243
Principal paydown	(124)	0	(195)	0
Ending Balance	$ 1,834	$ 2,243	$ 1,834	$ 2,243

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Profit-Sharing Plan - (Details) - Multiple employer 401(k) profit sharing plan - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Defined Contribution Plan Disclosure [Line Items]
Defined contribution plan, requisite service period			1 year
Defined contribution plan, minimum age requirement			21 years
Contributions by the Company	$ 1.1	$ 1.3	$ 2.9	$ 2.5

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Fair Value of Financial Instruments - Mortgage Loans Held for Sale (Details) - Fair value, measurements, nonrecurring - USD ($) $ in Thousands	Jun. 30, 2015	Sep. 30, 2014
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Other real estate owned	$ 13,051	$ 36,879
Impaired loans	166,841	111,265
Loans held for sale, at lower of cost or fair value	9,173	10,381
Level 1
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Other real estate owned	0	0
Impaired loans	0	0
Loans held for sale, at lower of cost or fair value	0	0
Level 2
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Other real estate owned	0	0
Impaired loans	0	0
Loans held for sale, at lower of cost or fair value	9,173	10,381
Level 3
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Other real estate owned	13,051	36,879
Impaired loans	166,841	111,265
Loans held for sale, at lower of cost or fair value	$ 0	$ 0

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Income Taxes - (Narrative) (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Sep. 30, 2014
Income Tax Contingency [Line Items]
Income tax payable	$ 0	$ 4,915
Internal Revenue Service (IRS)
Income Tax Contingency [Line Items]
Income taxes receivable	$ 1,400
National Americas Investment, Inc
Income Tax Contingency [Line Items]
Income tax payable		$ 4,900

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Core Deposits and Other Intangibles - Schedule of Future Amortization Expense (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Sep. 30, 2014
Goodwill and Intangible Assets Disclosure [Abstract]
Remaining in 2015	$ 709
2016	2,822
2017	1,097
2018	564
2019	564
2020 and thereafter	2,071
Core deposits and other intangibles	$ 7,827	$ 14,229

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Fair Value of Financial Instruments

9 Months Ended

Jun. 30, 2015

Fair Value Disclosures [Abstract]

Fair Value of Financial Instruments

Fair Value of Financial Instruments

The Company measures, monitors and discloses certain of its assets and liabilities on a fair value basis. Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. The fair value guidance also establishes a fair value hierarchy that requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. The guidance describes three levels of inputs that may be used to measure fair value are as follows:

Level 1    Quoted prices in active markets for identical assets or liabilities

Level 2 Observable inputs other than Level 1 prices, such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities

Level 3 Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities

Level 1 inputs are considered to be the most transparent and reliable and Level 3 inputs are considered to be the least transparent and reliable. The Company assumes the use of the principal market to conduct a transaction of each particular asset or liability being measured and then considers the assumptions that market participants would use when pricing the asset or liability. Whenever possible, the Company first looks for quoted prices for identical assets or liabilities in active markets (Level 1 inputs) to value each asset or liability. However, when inputs from identical assets or liabilities on active markets are not available, the Company utilizes market observable data for similar assets and liabilities. The Company maximizes the use of observable inputs and limits the use of unobservable inputs to occasions when observable inputs are not available. The need to use unobservable inputs generally results from the lack of market liquidity of the actual financial instrument or of the underlying collateral. Although in some instances, third party price indications may be available, limited trading activity can challenge the observability of these quotations.

Assets and Liabilities Measured at Fair Value on a Recurring Basis

Following is a description of the valuation methodologies and inputs used for assets and liabilities measured at fair value on a recurring basis and recognized in the accompanying consolidated balance sheets, as well as the general classification of such assets and liabilities pursuant to the valuation hierarchy.

Securities Available for Sale

Where quoted market prices are available in an active market, securities are classified within Level 1 of the valuation hierarchy. Level 1 securities include U.S. Treasury securities and U.S. Agency securities. If quoted market prices are not available, then fair values are estimated by using pricing models, quoted prices of securities with similar characteristics, or discounted cash flows and classified as Level 2 securities. Level 2 securities include agency mortgage-backed, states and political subdivisions, corporate debt, and other securities. Where Level 1 or Level 2 inputs are not available, securities are classified within Level 3 of the hierarchy.

Interest Rate Swaps and Loans

Interest rate swaps are valued using the system used to value all traded securities and derivatives with swap counterparties using LIBOR rates. The fair value of loans accounted for under the fair value option represents the net carrying value of the loan, plus the equal and opposite amount of the value of the swap needed to hedge the interest rate risk and an adjustment for credit risk based on our assessment of existing market conditions for the specific portfolio of loans. This is used due to the strict prepayment penalties put in the loan terms to cover the cost of exiting the hedge of the loans in the case of early prepayment or termination. The adjustment for credit risk on loans accounted for under the fair value option is not significant to the overall fair value of the loans. The fair values estimated by swap counterparties use interest rates that are observable or that can be corroborated by observable market data and, therefore, are classified within Level 2 of the valuation hierarchy. The Company is required to post cash collateral to swap counterparties for interest rate derivative contracts that are in a liability position, thus a credit risk adjustment on interest rate swaps is not warranted.

The following table presents the fair value measurements of assets and liabilities recognized in the accompanying consolidated balance sheets measured at fair value on a recurring basis and the level within the fair value hierarchy in which the fair value measurements fall at June 30, 2015 and September 30, 2014 (in thousands):

	Fair Value		Level 1		Level 2		Level 3
As of June 30, 2015
U.S. Treasury securities	$	303,132	$	303,132	$	—	$	—
U.S. Agency securities	74,375		74,375		—		—
Mortgage-backed securities	1,025,026		—		1,025,026		—
States and political subdivision securities	1,864		—		30		1,834
Corporate debt securities	5,030		—		5,030		—
Other	1,048		—		1,048		—
Securities available for sale	$	1,410,475	$	377,507	$	1,031,134	$	1,834
Derivatives-assets	$	1	$	—	$	1	$	—
Derivatives-liabilities	24,426		—		24,426		—
Fair value loans and written loan commitments	1,063,665		—		1,063,665		—
	Fair Value		Level 1		Level 2		Level 3
As of September 30, 2014
U.S. Treasury securities	$	222,725	$	222,725	$	—	$	—
U.S. Agency securities	—		—		—		—
Mortgage-backed securities	1,103,415		—		1,103,415		—
States and political subdivision securities	2,189		—		160		2,029
Corporate debt securities	11,873		—		11,873		—
Other	1,040		—		1,040		—
Securities available for sale	$	1,341,242	$	222,725	$	1,116,488	$	2,029
Derivatives-assets	$	19	$	—	$	19	$	—
Derivatives-liabilities	13,092		—		13,092		—
Fair value loans and written loan commitments	985,411		—		985,411		—

The following table presents the changes in Level 3 financial instruments for the three months ended June 30, 2015 and 2014 (in thousands):

	Other Securities Available for Sale
Balance as of March 31, 2015	$	1,958
Principal paydown	(124		)
Balance as of June 30, 2015	$	1,834
Balance as of March 31, 2014	$	2,243
Principal paydown	—
Balance as of June 30, 2014	$	2,243

The following table presents the changes in Level 3 financial instruments for the nine months ended June 30, 2015 and 2014 (in thousands):

	Other Securities Available for Sale
Balance as of September 30, 2014	$	2,029
Principal paydown	(195		)
Balance as of June 30, 2015	$	1,834
Balance as of September 30, 2013	$	2,243
Principal paydown	—
Balance as of June 30, 2014	$	2,243

Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis

Following is a description of the valuation methodologies used for assets and liabilities measured at fair value on a nonrecurring basis and recognized in the accompanying consolidated balance sheets, as well as the general classification of such assets and liabilities pursuant to the valuation hierarchy.

Impaired Loans (Collateral Dependent)

Loans for which it is probable that the Company will not collect all principal and interest due according to contractual terms are measured for impairment. Allowable methods for estimating fair value include using the fair value of the collateral for collateral dependent loans or, where a loan is determined not to be collateral dependent, using the discounted cash flow method.

If the impaired loan is identified as collateral dependent, then the fair value method of measuring the amount of the impairment is utilized. This method requires obtaining a current independent appraisal of the collateral and applying a discount factor, if necessary, to the appraised value and including costs to sell. Because many of these inputs are not observable, the measurements are classified as Level 3.

Other Real Estate Owned (OREO)

Other real estate owned consists of loan collateral that has been repossessed through foreclosure. This collateral is comprised of commercial and residential real estate. OREO is recorded initially at fair value of the collateral less estimated selling costs. Subsequent to foreclosure, valuations are updated periodically, and the assets may be marked down further to fair value less selling costs, reflecting a valuation allowance. Fair value measurements may be based upon appraisals, third-party price opinions, or internally developed pricing methods. These measurements are classified as Level 3.

Mortgage Loans Held for Sale

Fair value of mortgage loans held for sale is based on either quoted prices for the same or similar loans, or values obtained from third parties, or are estimated for portfolios of loans with similar financial characteristics and are therefore considered a Level 2 valuation.

The following tables present the fair value measurement of assets and liabilities measured at fair value on a nonrecurring basis and the level within the fair value hierarchy in which the fair value measurements fall at June 30, 2015 and September 30, 2014 (in thousands):

	Fair Value		Level 1		Level 2		Level 3
As of June 30, 2015
Other real estate owned	$	13,051	$	—	$	—	$	13,051
Impaired loans	166,841		—		—		166,841
Loans held for sale, at lower of cost or fair value	9,173		—		9,173		—
As of September 30, 2014
Other real estate owned	$	36,879	$	—	$	—	$	36,879
Impaired loans	111,265		—		—		111,265
Loans held for sale, at lower of cost or fair value	10,381		—		10,381		—

The valuation techniques and significant unobservable inputs used to measure Level 3 fair value measurements at June 30, 2015 were as follows (in thousands):

Financial Instrument	Fair Value of Assets / (Liabilities) at June 30, 2015		Valuation Technique(s)	Unobservable Input	Range	Weighted Average
Other real estate owned	$	13,051	Appraisal value	Property specific adjustment	N/A	N/A
Impaired loans	$	166,841	Appraisal value	Property specific adjustment	N/A	N/A

Disclosures about Fair Value of Financial Instruments

For financial instruments that have quoted market prices, those quotes are used to determine fair value. Financial instruments that have no defined maturity, have a remaining maturity of 180 days or less, or reprice frequently to a market rate are assumed to have a fair value that approximates carrying value, after taking into consideration any applicable credit risk. If no market quotes are available, financial instruments are valued by discounting the expected cash flows using an estimated current market interest rate for the financial instrument.

The short maturity of the Company’s assets and liabilities results in having a significant number of financial instruments whose fair value equals or closely approximates carrying value. Such financial instruments are reported in the following consolidated balance sheet categories: cash and due from banks, securities sold under agreements to repurchase, and accrued interest.

Fair value estimates are based on existing on and off-balance sheet financial instruments without attempting to estimate the value of anticipated future business and the value of assets and liabilities that are not considered financial instruments. Significant assets and liabilities that are not considered financial instruments include premises and equipment, deferred income taxes, goodwill, and core deposit and other intangibles. In addition, the tax ramifications related to the realization of unrealized gains and losses can have a significant effect on fair value estimates and have not been considered in the estimates.

Off-balance sheet instruments (commitments to extend credit and standby letters of credit) are generally short-term and at variable rates. Therefore, both the carrying amount and the estimated fair value associated with these instruments are immaterial. Fair values for balance sheet instruments as of June 30, 2015 and September 30, 2014, are as follows (in thousands):

		June 30, 2015				September 30, 2014
	Level in Fair Value Hierarchy	Carrying Amount		Fair Value		Carrying Amount		Fair Value
Assets
Cash and due from banks	Level 1	$	187,171	$	187,171	$	256,639	$	256,639
Loans, net excluding fair valued loans and loans held for sale	Level 3	6,116,471		6,099,234		5,744,157		5,734,274
Accrued interest receivable	Level 2	39,528		39,528		42,609		42,609
Federal Home Loan Bank stock	Level 2	36,287		36,287		35,922		35,922
Liabilities
Deposits	Level 3	$	7,357,688	$	7,384,060	$	7,052,180	$	7,057,591
FHLB advances, related party notes payable, and other borrowings	Level 2	631,815		624,431		616,389		604,615
Securities sold under repurchase agreements	Level 2	161,559		161,559		161,687		161,687
Accrued interest payable	Level 2	4,211		4,211		5,273		5,273
Subordinated debentures	Level 2	56,083		56,071		56,083		56,084

The following methods and assumptions were used in estimating the fair value of financial instruments that were not previously disclosed:

Cash and cash due from banks: Due to the short term nature of cash and cash equivalents, the estimated fair value is equal to the carrying value and they are categorized as a Level 1 fair value measurement.

Loans, net excluding fair valued loans and loans held for sale: The fair value of the loan portfolio is estimated using observable inputs including estimated cash flows, and discount rates based on interest rates currently being offered for loans with similar terms, to borrowers of similar credit quality. Loans held for investment are categorized as a Level 3 fair value measurement.

Accrued interest receivable: Due to the nature of accrued interest receivable, the estimated fair value is equal to the carrying value and they are categorized as a Level 2 fair value measurement.

Federal Home Loan Bank stock: The carrying amount of FHLB stock approximates its fair value as it can only be redeemed with the FHLB at par value. Federal Home Loan Bank stock has been categorized as a Level 2 fair value measurement.

Deposits: The estimated fair value of deposits with no stated maturity, such as non-interest bearing demand deposits, savings, NOW, and money market accounts, is equal to the amount payable on demand. The fair value of interest-bearing time deposits is based on the discounted value of contractual cash flows of such deposits, taking into account the option for early withdrawal. The discount rate is estimated using the rates offered by the Company, at the respective measurement dates, for deposits of similar maturities. Deposits have been categorized as a Level 3 fair value measurement.

FHLB advances, related party notes payable, and other borrowings: The fair value of FHLB advances, related party notes payable, and other borrowings is estimated using discounted cash flow analysis, based on current incremental borrowing rates for similar types of borrowing arrangements. In the absence of a reasonably precise methodology to determine the fair value of the credit agreement, carrying value has been used to represent fair value. FHLB advances, related party notes payable, and other borrowings have been categorized as a Level 2 fair value measurement.

Securities sold under repurchase agreements: The Company’s repurchase agreements are overnight transactions that mature the day after the transaction, and as a result of this short-term nature, the estimated fair value equals the carrying value. Securities sold under repurchase agreements have been categorized as a Level 2 fair value measurement.

Accrued interest payable: Due to the nature of accrued interest payable, the estimated fair value is equal to the carrying value and they are categorized as a Level 2 fair value measurement.

Subordinated Debentures: The fair value of subordinated debentures is estimated using discounted cash flow analysis, based on current incremental debt rates. Subordinated debentures have been categorized as a Level 2 fair value measurement.

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Loans - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014	Sep. 30, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans covered by FDIC loss share agreements	$ 102,203		$ 102,203			$ 234,036
Loan held for sale	9,173		9,173			10,381
Loans and written loan commitments at fair value under the fair value option	1,063,665		1,063,665			985,411
Unamortized discount on acquired loans	6,800		6,800			6,300
Loans in process	(400)		(400)			600
Loans guaranteed by U.S. Government Agencies	6,070,236		6,070,236			5,692,071
Principal balances of residential real estate loans sold	79,500	$ 58,400	213,400	$ 146,300
Average recorded investment	192,600	165,200	177,000	170,500
Interest income recognized on impaired loans	2,300	1,200	7,100	4,600
Valuation adjustments made to repossessed properties	1,200	$ 8,200	5,600	$ 9,300
Specific reserves included in the allowance for loan losses for TDRs	3,000		3,000			3,200
Loans Receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and written loan commitments at fair value under the fair value option	1,063,700		1,063,700		$ 985,400
Loans Guaranteed by US Government Authorities
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans guaranteed by U.S. Government Agencies	$ 108,600		$ 108,600			$ 106,500

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Basis of Presentation - Schedule of Error Correction on Realized Gain (Loss) on Derivatives (Details) - USD ($) $ in Thousands	9 Months Ended		12 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2012
Noninterest income
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Realized (loss) on derivatives	$ (13,277)	$ (10,207)	$ (18,255)	$ (14,217)	$ (9,931)
Immaterial error correction | Interest income
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Realized (loss) on derivatives	$ (13,277)	$ (10,207)	$ (18,255)	$ (14,217)	$ (9,931)

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FHLB Advances, Related Party Notes Payable and Other Borrowings - Schedule of Advances, Related Party Notes (Details) - USD ($)	9 Months Ended	12 Months Ended
	Jun. 30, 2015	Sep. 30, 2014
Debt Instrument [Line Items]
Related party notes payable	$ 41,295,000	$ 41,295,000
Notes payable	590,000,000	575,000,000
Other	520,000	94,000
Total FHLB advances and other borrowings	590,520,000	575,094,000
Total borrowings	631,815,000	616,389,000
Subordinated Capital Note to NAB New York due June 2018
Debt Instrument [Line Items]
Related party notes payable	35,795,000	35,795,000
Revolving line of credit to NAB
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity	10,000,000	10,000,000
Related party notes payable	$ 5,500,000	$ 5,500,000
Subordinated debt | Subordinated Capital Note to NAB New York due June 2018 | London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Basis spread on variable rate	2.05%	2.05%
Subordinated debt | Notes Payable to FHLB collateralized by real estate loans, due 2023 | Minimum | London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Stated interest rate, percentage	0.21%	0.21%
Subordinated debt | Notes Payable to FHLB collateralized by real estate loans, due 2023 | Maximum | London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Stated interest rate, percentage	3.66%	3.66%
Line of credit | Revolving line of credit to NAB | London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Basis spread on variable rate	1.25%	1.25%

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FHLB Advances, Related Party Notes Payable and Other Borrowings (Tables)

9 Months Ended

Jun. 30, 2015

Federal Home Loan Banks [Abstract]

Schedule of FHLB Advances and Other Borrowings

FHLB advances, related party notes payable, and other borrowings consist of the following at June 30, 2015 and September 30, 2014 (in thousands):

	June 30, 2015		September 30, 2014
Subordinated capital note to NAB New York (a branch of NAB), due June 2018, interest paid quarterly based on LIBOR plus 205 basis points, unsecured	$	35,795	$	35,795
$10,000 revolving line of credit to NAB due on demand, interest paid monthly based on LIBOR plus 125 basis points, unsecured	5,500		5,500
Total related party notes payable	41,295		41,295
Notes payable to Federal Home Loan Bank (FHLB), interest rates from 0.21% to 3.66% and maturity dates from February 2016 to July 2023, collateralized by real estate loans and FHLB stock, with various call dates at the option of the FHLB	590,000		575,000
Other	520		94
Total FHLB advances and other borrowings	590,520		575,094
Total borrowings	$	631,815	$	616,389

Schedule of FHLB Advances and Other Borrowings by Maturity Date

As of June 30, 2015, FHLB advances, related party notes payable and other borrowings are due or callable (whichever is earlier) in subsequent fiscal years as follows (in thousands):

Remaining in 2015	$	6,020
2016	90,000
2017	25,000
2018	60,795
2019	50,000
2020 and thereafter	400,000
	$	631,815

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Loans - Past Due Loans (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Sep. 30, 2014
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans, excluding loans covered under FDIC loss-sharing arrangements	$ 59,843	$ 43,945
Financing receivables, net of unamortized discount on acquired loans	6,085,813	5,574,881
Loans covered by FDIC loss sharing agreements	102,203	234,036
Total	6,188,016	5,808,917
Residential real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans, excluding loans covered under FDIC loss-sharing arrangements	7,846	6,671
Financing receivables, net of unamortized discount on acquired loans	811,578	764,754
Loans covered by FDIC loss sharing agreements	102,203	127,115
Total	913,781	891,869
Commercial real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans, excluding loans covered under FDIC loss-sharing arrangements	22,000	20,767
Financing receivables, net of unamortized discount on acquired loans	2,413,176	2,003,838
Loans covered by FDIC loss sharing agreements	0	95,467
Total	2,413,176	2,099,305
Commercial non real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans, excluding loans covered under FDIC loss-sharing arrangements	8,198	4,908
Financing receivables, net of unamortized discount on acquired loans	1,264,583	1,312,658
Loans covered by FDIC loss sharing agreements	0	9,390
Total	1,264,583	1,322,048
Agriculture
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans, excluding loans covered under FDIC loss-sharing arrangements	21,709	11,453
Financing receivables, net of unamortized discount on acquired loans	1,482,311	1,369,549
Loans covered by FDIC loss sharing agreements	0	2,004
Total	1,482,311	1,371,553
Consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans, excluding loans covered under FDIC loss-sharing arrangements	90	146
Financing receivables, net of unamortized discount on acquired loans	75,264	89,839
Loans covered by FDIC loss sharing agreements	0	60
Total	75,264	89,899
Other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables, net of unamortized discount on acquired loans	38,901	34,243
Loans covered by FDIC loss sharing agreements	0	0
Total	38,901	34,243
Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables, net of unamortized discount on acquired loans	6,053,214	5,542,128
Loans covered by FDIC loss sharing agreements	99,553	227,096
Total	6,152,767	5,769,224
Current | Residential real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables, net of unamortized discount on acquired loans	806,716	760,887
Current | Commercial real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables, net of unamortized discount on acquired loans	2,402,342	1,988,585
Current | Commercial non real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables, net of unamortized discount on acquired loans	1,257,382	1,303,925
Current | Agriculture
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables, net of unamortized discount on acquired loans	1,472,970	1,364,960
Current | Consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables, net of unamortized discount on acquired loans	74,903	89,528
Current | Other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables, net of unamortized discount on acquired loans	38,901	34,243
Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables, net of unamortized discount on acquired loans	32,599	32,753
Loans covered by FDIC loss sharing agreements	2,650	6,940
Total	35,249	39,693
Past Due | Residential real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables, net of unamortized discount on acquired loans	4,862	3,867
Past Due | Commercial real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables, net of unamortized discount on acquired loans	10,834	15,253
Past Due | Commercial non real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables, net of unamortized discount on acquired loans	7,201	8,733
Past Due | Agriculture
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables, net of unamortized discount on acquired loans	9,341	4,589
Past Due | Consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables, net of unamortized discount on acquired loans	361	311
Past Due | Other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables, net of unamortized discount on acquired loans	0	0
Past Due | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables, net of unamortized discount on acquired loans	9,573	13,746
Loans covered by FDIC loss sharing agreements	1,267	1,960
Total	10,840	15,706
Past Due | 30-59 Days Past Due | Residential real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables, net of unamortized discount on acquired loans	734	675
Past Due | 30-59 Days Past Due | Commercial real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables, net of unamortized discount on acquired loans	5,194	11,050
Past Due | 30-59 Days Past Due | Commercial non real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables, net of unamortized discount on acquired loans	1,867	1,761
Past Due | 30-59 Days Past Due | Agriculture
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables, net of unamortized discount on acquired loans	1,650	16
Past Due | 30-59 Days Past Due | Consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables, net of unamortized discount on acquired loans	128	244
Past Due | 30-59 Days Past Due | Other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables, net of unamortized discount on acquired loans	0	0
Past Due | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables, net of unamortized discount on acquired loans	2,495	8,044
Loans covered by FDIC loss sharing agreements	371	1,252
Total	2,866	9,296
Past Due | 60-89 Days Past Due | Residential real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables, net of unamortized discount on acquired loans	644	611
Past Due | 60-89 Days Past Due | Commercial real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables, net of unamortized discount on acquired loans	1,313	819
Past Due | 60-89 Days Past Due | Commercial non real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables, net of unamortized discount on acquired loans	121	6,228
Past Due | 60-89 Days Past Due | Agriculture
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables, net of unamortized discount on acquired loans	221	368
Past Due | 60-89 Days Past Due | Consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables, net of unamortized discount on acquired loans	196	18
Past Due | 60-89 Days Past Due | Other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables, net of unamortized discount on acquired loans	0	0
Past Due | Greater Than 90 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables, net of unamortized discount on acquired loans	20,531	10,963
Loans covered by FDIC loss sharing agreements	1,012	3,728
Total	21,543	14,691
Past Due | Greater Than 90 Days | Residential real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables, net of unamortized discount on acquired loans	3,484	2,581
Past Due | Greater Than 90 Days | Commercial real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables, net of unamortized discount on acquired loans	4,327	3,384
Past Due | Greater Than 90 Days | Commercial non real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables, net of unamortized discount on acquired loans	5,213	744
Past Due | Greater Than 90 Days | Agriculture
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables, net of unamortized discount on acquired loans	7,470	4,205
Past Due | Greater Than 90 Days | Consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables, net of unamortized discount on acquired loans	37	49
Past Due | Greater Than 90 Days | Other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables, net of unamortized discount on acquired loans	$ 0	$ 0

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The Fair Value Option - (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Sep. 30, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Eligible item for the fair value option			$ 18.9		$ 7.1
Long-term loans and written loan commitments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Eligible item for the fair value option	$ 0.0	$ 0.7	0.5	$ 1.4
Fair value, option, aggregate differences, long-term debt instruments	$ 1,044.7		$ 1,044.7		$ 978.3

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Accounting for Certain Loans Acquired with Deteriorated Credit Quality - Schedule of Troubled Debt Restructurings (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Certain Loans Acquired in Transfer Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward]
Balance at beginning of period	$ 43,431	$ 56,415	$ 50,889	$ 67,660
Accretion	(3,240)	(4,642)	(11,249)	(14,016)
Reclassification from nonaccretable difference	7,736	227	8,367	3,175
Disposals	(1,038)	(185)	(1,118)	(5,004)
Balance at end of period	$ 46,889	$ 51,815	$ 46,889	$ 51,815

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Securities Available for Sale - Schedule of Available For Sale Securities (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Sep. 30, 2014
Amortized Cost
Due in one year or less	$ 75,053	$ 7,207
Due after one year through five years	305,648	223,282
Due after five years through ten years	1,039	6,299
Amortized Cost	381,740	236,788
Fair Value
Due in one year or less	75,050	7,218
Due after one year through five years	308,312	223,140
Due after five years through ten years	1,039	6,429
Fair Value	384,401	236,787
Amortized Cost	1,413,255	1,351,157
Fair Value	1,410,475	1,341,242
Securities without contractual maturities, Amortized Cost	1,006	1,006
Securities without contractual maturities, Fair Value	1,048	1,040
Mortgage-backed securities
Fair Value
Amortized Cost	1,030,509	1,113,363
Fair Value	$ 1,025,026	$ 1,103,415

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Basis of Presentation

9 Months Ended

Jun. 30, 2015

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Basis of Presentation

Basis of Presentation

Great Western Bancorp, Inc. (the “Company”) is a bank holding company organized under the laws of Delaware. The primary business of the Company is ownership of its wholly owned subsidiary, Great Western Bank (the “Bank”). The Bank is a full-service regional bank focused on relationship-based business and agribusiness banking in Arizona, Colorado, Iowa, Kansas, Missouri, Nebraska, and South Dakota. The Company and the Bank are subject to the regulation of certain federal and/or state agencies and undergo periodic examinations by those regulatory authorities. Substantially all of the Company’s income is generated from banking operations.

The accompanying unaudited consolidated interim financial statements have been prepared in accordance with accounting principles generally accepted in the United States (“U.S. GAAP”) and reflect all adjustments that are, in the opinion of management, necessary for the fair presentation of the financial position and results of operations for the periods presented. All such adjustments are of a normal recurring nature other than the reclassifications outlined below. We have also reclassified certain prior year amounts to conform to prior periods, which did not have a material impact on our consolidated financial condition or results of operations.

The unaudited interim consolidated financial statements should be read in conjunction with the Company’s audited consolidated financial statements for the year ending September 30, 2014, which includes a description of significant accounting policies. The results of operations for interim periods are not necessarily indicative of the results that may be expected for the year or any other period.

The accompanying unaudited consolidated financial statements include the accounts and results of operations of the Company and its subsidiaries after elimination of all significant intercompany accounts and transactions. The preparation of unaudited consolidated financial statements in conformity with U.S. GAAP requires management to make certain estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. Actual results could differ from these estimates.

The Company has evaluated all events or transactions that occurred through the date the Company issued these financial statements. During this period, the Company did not have any material recognizable or non-recognizable subsequent events other than outlined below.

Prior to the initial public offering of shares of its common stock in October 2014, the Company was an indirect wholly-owned subsidiary of NAB. NAB sold 18.4 million shares, representing 31.8% of the Company's common stock, in the initial public offering. On May 6, 2015, NAB sold 23.0 million shares of the Company's common stock, representing 39.7% of the Company's common stock, in the second stage of its planned divestment. After completion of the May 6, 2015 offering, NAB beneficially owned 28.5% of the Company's outstanding common stock. On July 31, 2015, NAB sold all of its remaining shares of the Company's common stock in a secondary public offering of 13,819,596 shares and a concurrent share repurchase transaction in which the Company acquired 2,666,518 shares from NAB to fully divest its ownership.

On July 27, 2015, the board of directors of the Company declared a dividend of $0.12 per common share payable on August 28, 2015 to owners of record as of close of business on August 14, 2015.

On July 31, 2015, we repaid $41.3 million of outstanding subordinated capital notes and revolving lines of credit with NAB with a combination of available cash and the proceeds of a $35 million private placement of subordinated debt.

Changes in the Presentation of Results for Loans at Fair Value and Related Derivatives

In the normal course of business, the Company manages interest rate risk by entering into fixed-to-floating interest rate swaps related to all fixed-rate loans with original terms longer than five years. The Company has elected to account for these loans using the Fair Value Option. During the first quarter of fiscal year 2015, the Company identified an immaterial error in its reporting of one aspect of the derivatives related to these loans and also elected to change the presentation of the reported changes in fair value of these loans and related derivatives, each as discussed below. The Company's previous consolidated financial statements have been corrected or reclassified, as appropriate, to be consistent with the accompanying unaudited consolidated financial statements.

During the first quarter of fiscal year 2015, the Company identified that the current realized gain (loss) on the derivatives related to fair value loans has been improperly recorded as loan interest income instead of being presented in the same line item as the unrealized gain (loss) on the derivatives. As such, the realized gain (loss) on the derivatives related to fair value loans has been moved from loan interest income to "Net realized and unrealized gain (loss) on derivatives" within noninterest income. The Company has determined these corrections to be immaterial to the prior period financial statements and there was no effect on net income, equity or cash flows. The following table reflects the impact of the matter described above on previously filed financial statements:

	Previously Reported			Currently Reported
	Interest Income			Noninterest Income
Nine months ended June 30, 2014
Realized (loss) on derivatives	$	(13,277	)	$	(13,277	)
Nine months ended June 30, 2013
Realized (loss) on derivatives	$	(10,207	)	$	(10,207	)
Twelve months ended September 30, 2014
Realized (loss) on derivatives	$	(18,255	)	$	(18,255	)
Twelve months ended September 30, 2013
Realized (loss) on derivatives	$	(14,217	)	$	(14,217	)
Twelve months ended September 30, 2012
Realized (loss) on derivatives	$	(9,931	)	$	(9,931	)

Additionally, the Company previously reported the changes in fair value of these loans related to both interest rates and credit quality in interest income and the Company presented the changes in fair value of the derivatives in noninterest expense. Changes in fair value related to interest rates on the loans and changes in fair value of the derivatives were completely offset in any reporting period. To improve the clarity and comparability of its financial statements, the Company has elected to change its presentation of the changes in fair value related to these loans and derivatives by presenting these changes in two separate line items in noninterest income. As such, changes in fair value related to these loans, both related to interest rates and credit quality, is presented in "Net increase (decrease) in fair value of loans at fair value"within noninterest income, and changes in fair value related to these derivatives is presented in "Net realized and unrealized gain (loss) on derivatives" within noninterest income. The following table reflects the impact of the matter described above on previously filed financial statements:

	Previously Reported						Currently Reported
	Interest Income			Noninterest Expense			Noninterest Income
Nine months ended June 30, 2014
Unrealized loss on derivatives	$	—		$	12,119		$	—		$	12,119
Loan fair value change related to interest rates	(12,119		)	—			(12,119		)	—
Loan fair value change related to credit quality	(1,387		)	—			(1,387		)	—
	$	(13,506	)	$	12,119		$	(13,506	)	$	12,119
Nine months ended June 30, 2013
Unrealized (gain) on derivatives	$	—		$	(41,635	)	$	—		$	(41,635	)
Loan fair value change related to interest rates	41,635			—			41,635			—
Loan fair value change related to credit quality	141			—			141			—
	$	41,776		$	(41,635	)	$	41,776		$	(41,635	)
Twelve months ended September 30, 2014
Unrealized loss on derivatives	$	—		$	11,922		$	—		$	11,922
Loan fair value change related to interest rates	(11,922		)	—			(11,922		)	—
Loan fair value change related to credit quality	18			—			18			—
	$	(11,904	)	$	11,922		$	(11,904	)	$	11,922
Twelve months ended September 30, 2013
Unrealized (gain) on derivatives	$	—		$	(40,305	)	$	—		$	(40,305	)
Loan fair value change related to interest rates	40,305			—			40,305			—
Loan fair value change related to credit quality	855			—			855			—
	$	41,160		$	(40,305	)	$	41,160		$	(40,305	)
Twelve months ended September 30, 2012
Unrealized loss on derivatives	$	—		$	19,369		$	—		$	19,369
Loan fair value change related to interest rates	(19,369		)	—			(19,369		)	—
Loan fair value change related to credit quality	4,276			—			4,276			—
	$	(15,093	)	$	19,369		$	(15,093	)	$	19,369

XML

Accounting for Certain Loans Acquired with Deteriorated Credit Quality - Schedule of Impaired Loans (Details) - USD ($) $ in Thousands		Jun. 30, 2015	Sep. 30, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Balance	[1]	$ 212,885	$ 267,151
Recorded Investment	[2]	115,801	162,139
Carrying Value	[3]	113,036	158,685
Residential real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Balance	[1]	98,677	115,863
Recorded Investment	[2]	86,569	102,987
Carrying Value	[3]	85,059	100,203
Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Balance	[1]	100,075	130,825
Recorded Investment	[2]	23,402	49,202
Carrying Value	[3]	22,147	48,557
Commercial non real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Balance	[1]	11,092	16,697
Recorded Investment	[2]	2,889	6,361
Carrying Value	[3]	2,889	6,361
Agriculture
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Balance	[1]	1,567	1,747
Recorded Investment	[2]	1,567	1,746
Carrying Value	[3]	1,567	1,746
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Balance	[1]	1,474	2,019
Recorded Investment	[2]	1,374	1,843
Carrying Value	[3]	$ 1,374	$ 1,818

[1] Represents the legal balance of loans acquired with deteriorated credit quality

[2] Represents the book balance of loans acquired with deteriorated credit quality

[3] Represents the book balance of loans acquired with deteriorated credit quality net of the related allowance for loan losses.

XML

Basis of Presentation - Schedule of Fair Value of Loans, Correction (Details) - USD ($)				1 Months Ended	3 Months Ended		9 Months Ended			12 Months Ended
	Jul. 31, 2015	Jul. 27, 2015	May. 06, 2015	Oct. 31, 2014	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2012
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Dividends declared per share (in dollars per share)					$ 0.12	$ 0.59	$ 0.24	$ 1.17
Change in fair value of loans					$ (24,394,000)	$ 13,886,000	$ 7,914,000	$ 13,506,000
Net increase (decrease) in fair value of loans at fair value | Adjustment
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Loan fair value change related to interest rates								(12,119,000)	$ 41,635,000	$ (11,922,000)	$ 40,305,000	$ (19,369,000)
Loan fair value change related to credit quality								(1,387,000)	141,000	18,000	855,000	4,276,000
Reclassification adjustment								(13,506,000)	41,776,000	(11,904,000)	41,160,000	(15,093,000)
Derivatives, net realized and unrealized gain (loss) | Adjustment
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Reclassification adjustment								12,119,000	(41,635,000)	11,922,000	(40,305,000)	19,369,000
Change in presentation of changes in fair value of fair value loans | Interest income | Previously Reported
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Loan fair value change related to interest rates								(12,119,000)	41,635,000	(11,922,000)	40,305,000	(19,369,000)
Loan fair value change related to credit quality								(1,387,000)	141,000	18,000	855,000	4,276,000
Change in fair value of loans								(13,506,000)	41,776,000	(11,904,000)	41,160,000	(15,093,000)
Change in presentation of gain (loss) for derivatives related to fair value loans | Noninterest expense | Previously Reported
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Unrealized loss on derivatives								$ 12,119,000	$ (41,635,000)	$ 11,922,000	$ (40,305,000)	$ 19,369,000
National Australia Bank Limited
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Number of shares sold by company			23,000,000	18,400,000
Shares sold by parent, percentage of company stock			39.70%	31.80%
Ownership percentage by parent			28.50%
Subsequent event
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Stock repurchased during period (shares)	2,666,518
Dividends declared per share (in dollars per share)		$ 0.12
Repayments of subordinated capital notes and revolving line of credit	$ 41,300,000
Subsequent event | National Australia Bank Limited
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Number of shares sold by company	13,819,596
Subordinated debt | Subsequent event
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Issuance of debt	$ 35,000,000

XML

Loans (Tables)

9 Months Ended

Jun. 30, 2015

Receivables [Abstract]

Schedule of Loans Receivable

The composition of net loans as of June 30, 2015 and September 30, 2014, is as follows (in thousands):

	June 30, 2015			September 30, 2014
Residential real estate	$	922,481		$	901,605
Commercial real estate	2,720,993			2,541,194
Commercial non real estate	1,701,024			1,571,640
Agriculture	1,813,330			1,681,209
Consumer	75,311			90,086
Other	38,901			34,243
	7,272,040			6,819,977
Less:
Allowance for loan losses	(55,930		)	(47,518		)
Unamortized discount on acquired loans	(20,356		)	(25,638		)
Unearned net deferred fees and costs and loans in process	(6,445		)	(6,872		)
	$	7,189,309		$	6,739,949

Schedule of Company's Nonaccrual Loans

The following table presents the Company’s nonaccrual loans at June 30, 2015 and September 30, 2014 (in thousands), excluding loans covered under the FDIC loss-sharing agreements. Loans greater than 90 days past due and still accruing interest as of June 30, 2015 and September 30, 2014, were not significant.

Nonaccrual loans	June 30, 2015		September 30, 2014
Residential real estate	$	7,846	$	6,671
Commercial real estate	22,000		20,767
Commercial non real estate	8,198		4,908
Agriculture	21,709		11,453
Consumer	90		146
Total	$	59,843	$	43,945

Past Due Financing Receivables

The following table (in thousands) presents the Company’s past due loans at June 30, 2015 and September 30, 2014. This table is presented net of unamortized discount on acquired loans and excludes loans measured at fair value with changes in fair value reported in earnings of $1,063.7 million for June 30, 2015 and $985.4 million for September 30, 2014.

As of June 30, 2015	30-59 Days Past Due		60-89 Days Past Due		Greater Than 90 Days		Total Past Due		Current		Total Financing Receivables
Residential real estate	$	734	$	644	$	3,484	$	4,862	$	806,716	$	811,578
Commercial real estate	5,194		1,313		4,327		10,834		2,402,342		2,413,176
Commercial non real estate	1,867		121		5,213		7,201		1,257,382		1,264,583
Agriculture	1,650		221		7,470		9,341		1,472,970		1,482,311
Consumer	128		196		37		361		74,903		75,264
Other	—		—		—		—		38,901		38,901
	9,573		2,495		20,531		32,599		6,053,214		6,085,813
Loans covered by FDIC loss sharing agreements	1,267		371		1,012		2,650		99,553		102,203
Total	$	10,840	$	2,866	$	21,543	$	35,249	$	6,152,767	$	6,188,016

As of September 30, 2014	30-59 Days Past Due		60-89 Days Past Due		90 Days or Greater Past Due		Total Past Due		Current		Total Financing Receivables
Residential real estate	$	675	$	611	$	2,581	$	3,867	$	760,887	$	764,754
Commercial real estate	11,050		819		3,384		15,253		1,988,585		2,003,838
Commercial non real estate	1,761		6,228		744		8,733		1,303,925		1,312,658
Agriculture	16		368		4,205		4,589		1,364,960		1,369,549
Consumer	244		18		49		311		89,528		89,839
Other	—		—		—		—		34,243		34,243
	13,746		8,044		10,963		32,753		5,542,128		5,574,881
Loans covered by FDIC loss sharing agreements	1,960		1,252		3,728		6,940		227,096		234,036
Total	$	15,706	$	9,296	$	14,691	$	39,693	$	5,769,224	$	5,808,917

Composition of Loan Portfolio by Internal Risk Rating

The composition of the loan portfolio by internally assigned grade is as follows as of June 30, 2015 and September 30, 2014. This table (in thousands) is presented net of unamortized discount on acquired loans and excludes loans measured at fair value with changes in fair value reported in earnings of $1,063.7 million for June 30, 2015 and $985.4 million for September 30, 2014:

As of June 30, 2015	Residential Real Estate		Commercial Real Estate		Commercial Non Real Estate		Agriculture		Consumer		Other		Total
Credit Risk Profile by Internally Assigned Grade
Grade:
Pass	$	794,153	$	2,260,026	$	1,147,017	$	1,262,624	$	74,951	$	38,901	$	5,577,672
Watchlist	5,142		98,836		51,606		166,583		89		—		322,256
Substandard	11,895		54,109		64,768		51,761		223		—		182,756
Doubtful	384		205		1,192		1,112		1		—		2,894
Loss	4		—		—		231		—		—		235
Ending balance	811,578		2,413,176		1,264,583		1,482,311		75,264		38,901		6,085,813
Loans covered by FDIC loss sharing agreements	102,203		—		—		—		—		—		102,203
Total	$	913,781	$	2,413,176	$	1,264,583	$	1,482,311	$	75,264	$	38,901	$	6,188,016

As of September 30, 2014	Residential Real Estate		Commercial Real Estate		Commercial Non Real Estate		Agriculture		Consumer		Other		Total
Credit Risk Profile by Internally Assigned Grade
Grade:
Pass	$	747,485	$	1,867,866	$	1,218,558	$	1,202,145	$	89,197	$	34,243	$	5,159,494
Watchlist	5,320		84,132		65,628		132,262		381		—		287,723
Substandard	11,290		51,692		27,499		35,107		242		—		125,830
Doubtful	659		148		798		35		19		—		1,659
Loss	—		—		175		—		—		—		175
Ending balance	764,754		2,003,838		1,312,658		1,369,549		89,839		34,243		5,574,881
Loans covered by FDIC loss sharing agreements	127,115		95,467		9,390		2,004		60		—		234,036
Total	$	891,869	$	2,099,305	$	1,322,048	$	1,371,553	$	89,899	$	34,243	$	5,808,917

Impaired Financing Receivables

The following table presents the Company’s impaired loans (in thousands). This table excludes loans covered by FDIC loss sharing agreements:

	Recorded Investment		Unpaid Principal Balance		Related Allowance		Average Recorded Investment
As of June 30, 2015
Impaired loans:
With an allowance recorded:
Residential real estate	$	12,481	$	12,678	$	2,582	$	12,294
Commercial real estate	77,015		78,947		3,006		69,585
Commercial non real estate	68,694		78,557		6,733		50,608
Agriculture	53,104		53,541		3,743		44,316
Consumer	224		312		45		252
	$	211,518	$	224,035	$	16,109	$	177,055

	Recorded Investment		Unpaid Principal Balance		Related Allowance		Average Recorded Investment
As of September 30, 2014
Impaired loans:
With an allowance recorded:
Residential real estate	$	12,107	$	12,737	$	2,529	$	13,572
Commercial real estate	62,155		64,597		2,017		84,490
Commercial non real estate	35,522		37,882		3,927		31,827
Agriculture	35,528		37,958		1,155		30,546
Consumer	280		491		51		346
	$	145,592	$	153,665	$	9,679	$	160,781

The following table provides purchased impaired loans at June 30, 2015 and September 30, 2014 (in thousands):

	June 30, 2015						September 30, 2014
	Outstanding Balance 1		Recorded Investment 2		Carrying Value 3		Outstanding Balance 1		Recorded Investment 2		Carrying Value 3
Residential real estate	$	98,677	$	86,569	$	85,059	$	115,863	$	102,987	$	100,203
Commercial real estate	100,075		23,402		22,147		130,825		49,202		48,557
Commercial non real estate	11,092		2,889		2,889		16,697		6,361		6,361
Agriculture	1,567		1,567		1,567		1,747		1,746		1,746
Consumer	1,474		1,374		1,374		2,019		1,843		1,818
Total lending	$	212,885	$	115,801	$	113,036	$	267,151	$	162,139	$	158,685

^{1    Represents the legal balance of loans acquired with deteriorated credit quality.}  

^{2    Represents the book balance of loans acquired with deteriorated credit quality.}  

^{3    Represents the book balance of loans acquired with deteriorated credit quality net of the related allowance for loan losses.} 

Troubled Debt Restructurings on Financing Receivables

The following table presents the recorded value of the Company’s TDR balances as of June 30, 2015 and September 30, 2014 (in thousands):

	June 30, 2015				September 30, 2014
	Accruing		Nonaccrual		Accruing		Nonaccrual
Residential real estate	$	668	$	1,536	$	1,112	$	1,730
Commercial real estate	44,170		4,680		25,177		6,884
Commercial non real estate	9,961		1,101		6,753		1,785
Agriculture	80		7,440		3,780		9,994
Consumer	37		7		35		22
Total	$	54,916	$	14,764	$	36,857	$	20,415

The following table presents a summary of all accruing loans restructured in TDRs during the three months ended June 30, 2015 and 2014, respectively:

	Three Months Ended June 30,
	2015					2014
		Recorded Investment					Recorded Investment
($ in thousands)	Number	Pre- Modification		Post- Modification		Number	Pre- Modification		Post- Modification
Residential real estate
Rate modification	—	$	—	$	—	—	$	—	$	—
Term extension	1	35		35		—	—		—
Payment modification	—	—		—		1	35		35
Bankruptcy	—	—		—		—	—		—
Other	—	—		—		—	—		—
Total residential real estate	1	35		35		1	35		35
Commercial real estate
Rate modification	—	—		—		—	—		—
Term extension	1	574		574		—	—		—
Payment modification	—	—		—		1	1,841		1,841
Bankruptcy	—	—		—		—	—		—
Other	—	—		—		—	—		—
Total commercial real estate	1	574		574		1	1,841		1,841
Commercial non real estate
Rate modification	—	—		—		—	—		—
Term extension	—	—		—		1	79		79
Payment modification	—	—		—		1	2,182		2,182
Bankruptcy	—	—		—		—	—		—
Other	—	—		—		1	2		2
Total commercial non real estate	—	—		—		3	2,263		2,263
Agriculture
Rate modification	—	—		—		—	—		—
Term extension	—	—		—		—	—		—
Payment modification	—	—		—		—	—		—
Bankruptcy	—	—		—		—	—		—
Other	—	—		—		—	—		—
Total agriculture	—	—		—		—	—		—
Consumer
Rate modification	—	—		—		—	—		—
Term extension	—	—		—		—	—		—
Payment modification	1	18		18		1	11		11
Bankruptcy	—	—		—		—	—		—
Other	—	—		—		—	—		—
Total consumer	1	18		18		1	11		11
Total accruing	3	$	627	$	627	6	$	4,150	$	4,150
Change in recorded investment due to principal paydown at time of modification	—	$	—	$	—	—	$	—	$	—
Change in recorded investment due to chargeoffs at time of modification	—	$	—	$	—	—	$	—	$	—

The following table presents a summary of all accruing loans restructured in TDRs during the nine months ended June 30, 2015 and 2014:

	Nine Months Ended June 30,
	2015					2014
		Recorded Investment					Recorded Investment
($ in thousands)	Number	Pre- Modification		Post- Modification		Number	Pre- Modification		Post- Modification
Residential real estate
Rate modification	1	$	15	$	15	—	$	—	$	—
Term extension	1	35		35		2	74		74
Payment modification	—	—		—		2	50		50
Bankruptcy	—	—		—		1	130		130
Other	1	21		21		—	—		—
Total residential real estate	3	71		71		5	254		254
Commercial real estate
Rate modification	—	—		—		—	—		—
Term extension	2	664		574		—	—		—
Payment modification	6	22,542		22,542		2	2,911		2,911
Bankruptcy	1	498		498		—	—		—
Other	—	—		—		—	—		—
Total commercial real estate	9	23,704		23,614		2	2,911		2,911
Commercial non real estate
Rate modification	1	32		32		—	—		—
Term extension	3	2,879		2,879		5	1,813		1,813
Payment modification	2	1,874		1,874		5	2,917		2,917
Bankruptcy	—	—		—		—	—		—
Other	—	—		—		2	329		329
Total commercial non real estate	6	4,785		4,785		12	5,059		5,059
Agriculture
Rate modification	—	—		—		—	—		—
Term extension	—	—		—		—	—		—
Payment modification	—	—		—		—	—		—
Bankruptcy	—	—		—		—	—		—
Other	—	—		—		—	—		—
Total agriculture	—	—		—		—	—		—
Consumer
Rate modification	—	—		—		—	—		—
Term extension	—	—		—		—	—		—
Payment modification	1	18		18		3	15		15
Bankruptcy	1	6		6		—	—		—
Other	—	—		—		2	28		28
Total consumer	2	24		24		5	43		43
Total accruing	20	$	28,584	$	28,494	24	$	8,267	$	8,267
Change in recorded investment due to principal paydown at time of modification	—	$	—	$	—	—	$	—	$	—
Change in recorded investment due to chargeoffs at time of modification	1	$	90	$	—	—	$	—	$	—

The following table presents a summary of all non-accruing loans restructured in TDRs during the three months ended June 30, 2015 and 2014:

	Three Months Ended June 30,
	2015					2014
		Recorded Investment					Recorded Investment
($ in thousands)	Number	Pre- Modification		Post- Modification		Number	Pre- Modification		Post- Modification
Residential real estate
Rate modification	—	$	—	$	—	—	$	—	$	—
Term extension	1	—		—		1	8		8
Payment modification	1	19		19		1	11		11
Bankruptcy	—	—		—		—	—		—
Other	1	25		10		—	—		—
Total residential real estate	3	44		29		2	19		19
Commercial real estate
Rate modification	—	—		—		—	—		—
Term extension	—	—		—		—	—		—
Payment modification	—	—		—		—	—		—
Bankruptcy	—	—		—		—	—		—
Other	—	—		—		—	—		—
Total commercial real estate	—	—		—		—	—		—
Commercial Non Real Estate
Rate modification	—	—		—		—	—		—
Term extension	1	77		—		—	—		—
Payment modification	1	4		4		1	36		36
Bankruptcy	—	—		—		—	—		—
Other	—	—		—		—	—		—
Total commercial non real estate	2	81		4		1	36		36
Agriculture
Rate modification	—	—		—		—	—		—
Term extension	—	—		—		—	—		—
Payment modification	—	—		—		—	—		—
Bankruptcy	—	—		—		—	—		—
Other	—	—		—		—	—		—
Total agriculture	—	—		—		—	—		—
Consumer
Rate modification	—	—		—		—	—		—
Term extension	1	1		1		—	—		—
Payment modification	—	—		—		—	—		—
Bankruptcy	—	—		—		—	—		—
Other	—	—		—		—	—		—
Total consumer	1	1		1		—	—		—
Total non-accruing	6	$	126	$	34	3	$	55	$	55
Change in recorded investment due to principal paydown at time of modification	—	$	—	$	—	—	$	—	$	—
Change in recorded investment due to chargeoffs at time of modification	2	$	92	$	—	—	$	—	$	—

The following table presents a summary of all non-accruing loans restructured in TDRs during the nine months ended June 30, 2015 and 2014:

	Nine Months Ended June 30,
	2015					2014
		Recorded Investment					Recorded Investment
($ in thousands)	Number	Pre- Modification		Post- Modification		Number	Pre- Modification		Post- Modification
Residential real estate
Rate modification	2	$	104	$	104	4	$	98	$	98
Term extension	2	77		77		3	26		26
Payment modification	1	19		19		1	11		11
Bankruptcy	1	43		43		1	4		4
Other	1	25		10		1	38		38
Total residential real estate	7	268		253		10	177		177
Commercial real estate
Rate modification	—	—		—		2	500		500
Term extension	—	—		—		2	4,031		4,031
Payment modification	—	—		—		—	—		—
Bankruptcy	—	—		—		—	—		—
Other	—	—		—		1	87		87
Total commercial real estate	—	—		—		5	4,618		4,618
Commercial Non Real Estate
Rate modification	—	—		—		—	—		—
Term extension	5	294		217		8	125		125
Payment modification	1	4		4		1	36		36
Bankruptcy	—	—		—		1	10		10
Other	—	—		—		—	—		—
Total commercial non real estate	6	298		221		10	171		171
Agriculture
Rate modification	—	—		—		—	—		—
Term extension	—	—		—		2	260		260
Payment modification	—	—		—		—	—		—
Bankruptcy	—	—		—		—	—		—
Other	—	—		—		—	—		—
Total agriculture	—	—		—		2	260		260
Consumer
Rate modification	—	—		—		—	—		—
Term extension	2	2		2		1	11		11
Payment modification	—	—		—		—	—		—
Bankruptcy	—	—		—		—	—		—
Other	—	—		—		1	1		1
Total consumer	2	2		2		2	12		12
Total non-accruing	15	$	568	$	476	29	$	5,238	$	5,238
Change in recorded investment due to principal paydown at time of modification	—	$	—	$	—	—	$	—	$	—
Change in recorded investment due to chargeoffs at time of modification	2	$	92	$	—	—	$	—	$	—

The tables below represent defaults on loans that were first modified during the respective past 12 months, that became 90 days or more delinquent or were charged-off during the three and nine months ended June 30, 2015 and 2014, respectively.

	Three Months Ended June 30,
	2015			2014
($ in thousands)	Number of Loans	Recorded Investment		Number of Loans	Recorded Investment
Residential real estate	1	$	10	—	$	—
Commercial real estate	—	—		—	—
Commercial non real estate	2	32		1	15
Agriculture	3	782		—	—
Consumer	—	—		—	—
	6	$	824	1	$	15

	Nine Months Ended June 30,
	2015			2014
($ in thousands)	Number of Loans	Recorded Investment		Number of Loans	Recorded Investment
Residential real estate	4	$	353	2	$	337
Commercial real estate	—	—		2	7,053
Commercial non real estate	4	32		4	537
Agriculture	3	782		7	7,361
Consumer	—	—		—	—
	11	$	1,167	15	$	15,288

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Securities Available for Sale (Tables)

9 Months Ended

Jun. 30, 2015

Investments, Debt and Equity Securities [Abstract]

Amortized Cost and Fair Value

The amortized cost and approximate fair value of investments in securities, all of which are classified as available for sale according to management’s intent, are summarized as follows (in thousands):

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
As of June 30, 2015
U.S. Treasury securities	$	300,501	$	2,744	$	(113	)	$	303,132
U.S. Agency securities	74,379		53		(57		)	74,375
Mortgage-backed securities:
Government National Mortgage Association	905,660		2,952		(7,055		)	901,557
Federal National Mortgage Association	47,727		—		(377		)	47,350
Small Business Assistance Program	77,122		—		(1,003		)	76,119
States and political subdivision securities	1,864		—		—			1,864
Corporate debt securities	4,996		34		—			5,030
Other	1,006		42		—			1,048
	$	1,413,255	$	5,825	$	(8,605	)	$	1,410,475

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
As of September 30, 2014
U.S. Treasury securities	$	222,868	$	31	$	(174	)	$	222,725
U.S. Agency securities	—		—		—			—
Mortgage-backed securities:
Government National Mortgage Association	1,113,363		4,639		(14,587		)	1,103,415
Federal National Mortgage Association	—		—		—			—
Small Business Assistance Program	—		—		—			—
States and political subdivision securities	2,188		1		—			2,189
Corporate debt securities	11,732		141		—			11,873
Other	1,006		34		—			1,040
	$	1,351,157	$	4,846	$	(14,761	)	$	1,341,242

Marketable Securities

The amortized cost and approximate fair value of debt securities available for sale as of June 30, 2015 and September 30, 2014, by contractual maturity, are shown below. Maturities of mortgage-backed securities may differ from contractual maturities because the mortgages underlying the securities may be called or repaid without any penalties.

	June 30, 2015				September 30, 2014
(In Thousands)	Amortized Cost		Fair Value		Amortized Cost		Fair Value
Due in one year or less	$	75,053	$	75,050	$	7,207	$	7,218
Due after one year through five years	305,648		308,312		223,282		223,140
Due after five years through ten years	1,039		1,039		6,299		6,429
	381,740		384,401		236,788		236,787
Mortgage-backed securities	1,030,509		1,025,026		1,113,363		1,103,415
Securities without contractual maturities	1,006		1,048		1,006		1,040
	$	1,413,255	$	1,410,475	$	1,351,157	$	1,341,242

Schedule of Unrealized Loss on Investments

The following table presents the Company’s gross unrealized losses and approximate fair value in investments, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position (in thousands):

	Less than 12 months					June 30, 2015 12 months or more					Total
	Fair Value		Unrealized			Fair Value		Unrealized			Fair Value		Unrealized
U.S. Treasury securities	$	18,364	$	(113	)	$	—	$	—		$	18,364	$	(113	)
U. S. Agency securities	49,577		(57		)	—		—			49,577		(57		)
Mortgage-backed securities	161,004		(1,607		)	507,944		(6,828		)	668,948		(8,435		)
	$	228,945	$	(1,777	)	$	507,944	$	(6,828	)	$	736,889	$	(8,605	)

	Less than 12 months					September 30, 2014 12 months or more					Total
	Fair Value		Unrealized			Fair Value		Unrealized			Fair Value		Unrealized
U.S. Treasury securities	$	98,344	$	(174	)	$	—	$	—		$	98,344	$	(174	)
U.S. Agency securities	—		—			—		—			—		—
Mortgage-backed securities	24,625		(125		)	730,171		(14,462		)	754,796		(14,587		)
	$	122,969	$	(299	)	$	730,171	$	(14,462	)	$	853,140	$	(14,761	)

Unrealized Gain (Loss) on Investments

The components of other comprehensive income from net unrealized gains (losses) on securities available for sale for the three and nine months ended June 30, 2015 and 2014, respectively are as follows (in thousands):

	Three Months Ended June 30,						Nine Months Ended June 30,
	2015			2014			2015			2014
Beginning balance accumulated other comprehensive income (loss)	$	2,111		$	(7,214	)	$	(6,157	)	$	(7,081	)
Net unrealized holding gain (loss) arising during the period	(6,099		)	7,752			7,186			7,363
Reclassification adjustment for net gain realized in net income	—			—			(51		)	(6		)
Net change in unrealized gain (loss) before income taxes	(6,099		)	7,752			7,135			7,357
Income tax (expense) benefit	2,254			(2,946		)	(2,712		)	(2,684		)
Net change in unrealized gain (loss) on securities after taxes	(3,845		)	4,806			4,423			4,673
Ending balance accumulated other comprehensive income (loss)	$	(1,734	)	$	(2,408	)	$	(1,734	)	$	(2,408	)

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Loans - Subsequent Defaults on Modified Loans (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2015 USD ($) contract	Jun. 30, 2014 USD ($) contract	Jun. 30, 2015 USD ($) contract	Jun. 30, 2014 USD ($) contract
Financing Receivable, Modifications [Line Items]
Number of Loans	6	1	11	15
Recorded Investment | $	$ 824	$ 15	$ 1,167	$ 15,288
Residential real estate
Financing Receivable, Modifications [Line Items]
Number of Loans	1	0	4	2
Recorded Investment | $	$ 10	$ 0	$ 353	$ 337
Commercial real estate
Financing Receivable, Modifications [Line Items]
Number of Loans	0	0	0	2
Recorded Investment | $	$ 0	$ 0	$ 0	$ 7,053
Commercial non real estate
Financing Receivable, Modifications [Line Items]
Number of Loans	2	1	4	4
Recorded Investment | $	$ 32	$ 15	$ 32	$ 537
Agriculture
Financing Receivable, Modifications [Line Items]
Number of Loans	3	0	3	7
Recorded Investment | $	$ 782	$ 0	$ 782	$ 7,361
Consumer
Financing Receivable, Modifications [Line Items]
Number of Loans	0	0	0	0
Recorded Investment | $	$ 0	$ 0	$ 0	$ 0

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Restrictions on Cash and Due from Banks (Details) - USD ($) $ in Millions	Jun. 30, 2015	Sep. 30, 2014
Cash and Cash Equivalents [Abstract]
Reserve balances	$ 42.9	$ 50.4

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Allowance for Loan Losses (Tables)

9 Months Ended

Jun. 30, 2015

Receivables [Abstract]

Allowance for credit losses on financing receivables

The following tables presents the Company’s allowance for loan losses roll forward for the three and nine month periods ended June 30, 2015 and 2014.

Three Months Ended June 30, 2015	Residential Real Estate			Commercial Real Estate			Commercial Non Real Estate			Agriculture			Consumer			Other			Total
Beginning balance April 1, 2015	$	7,495		$	15,736		$	15,957		$	12,222		$	189		$	827		$	52,426
Charge-offs	(77		)	(280		)	(1,337		)	(411		)	(31		)	(356		)	(2,492		)
Recoveries	84			205			949			10			32			306			1,586
Provision	(325		)	2,130			1,381			1,545			164			96			4,991
(Impairment) improvement of loans acquired with deteriorated credit quality	(625		)	45			—			—			(1		)	—			(581		)
Ending balance June 30, 2015	$	6,552		$	17,836		$	16,950		$	13,366		$	353		$	873		$	55,930

Three Months Ended June 30, 2014	Residential Real Estate			Commercial Real Estate			Commercial Non Real Estate			Agriculture			Consumer			Other			Total
Beginning balance April 1, 2014	$	10,277		$	17,603		$	10,275		$	7,903		$	430		$	665		$	47,153
Charge-offs	(144		)	(539		)	(1,884		)	(566		)	(39		)	(198		)	(3,370		)
Recoveries	94			497			469			14			69			612			1,755
Provision	187			494			727			389			(68		)	(229		)	1,500
(Impairment) improvement of loans acquired with deteriorated credit quality	—			—			—			—			—			—			—
Ending balance June 30, 2014	$	10,414		$	18,055		$	9,587		$	7,740		$	392		$	850		$	47,038

Nine Months Ended June 30, 2015	Residential Real Estate			Commercial Real Estate			Commercial Non Real Estate			Agriculture			Consumer			Other			Total
Beginning balance October 1, 2014	$	8,342		$	16,884		$	10,550		$	10,655		$	264		$	823		$	47,518
Charge-offs	(197		)	(1,932		)	(9,861		)	(438		)	(88		)	(1,187		)	(13,703		)
Recoveries	197			300			3,092			89			79			950			4,707
Provision	(515		)	2,476			13,169			3,060			123			287			18,600
(Impairment) improvement of loans acquired with deteriorated credit quality	(1,275		)	108			—			—			(25		)	—			(1,192		)
Ending balance June 30, 2015	$	6,552		$	17,836		$	16,950		$	13,366		$	353		$	873		$	55,930

Nine Months Ended June 30, 2014	Residential Real Estate			Commercial Real Estate			Commercial Non Real Estate			Agriculture			Consumer			Other			Total
Beginning balance October 1, 2013	$	11,779		$	22,562		$	11,222		$	9,296		$	312		$	693		$	55,864
Charge-offs	(581		)	(3,733		)	(2,883		)	(2,652		)	(191		)	(1,154		)	(11,194		)
Recoveries	190			1,521			1,228			29			136			1,329			4,433
Provision	201			(2,903		)	1,461			1,067			67			(18		)	(125		)
(Impairment) improvement of loans acquired with deteriorated credit quality	(1,175		)	608			(1,441		)	—			68			—			(1,940		)
Ending balance June 30, 2014	$	10,414		$	18,055		$	9,587		$	7,740		$	392		$	850		$	47,038

The following tables provide details regarding the allowance for loan and lease losses and balance by type of allowance. These tables (in thousands) are presented net of unamortized discount on acquired loans and excludes loans measured at fair value with changes in fair value reported in earnings of $1,063.7 million, loans held for sale of $9.2 million, and guaranteed loans of $108.6 million for June 30, 2015 and loans measured at fair value with changes in fair value reported in earnings of $985.4 million, loans held for sale of $10.4 million, and guaranteed loans of $106.5 million for September 30, 2014.

As of June 30, 2015	Residential Real Estate		Commercial Real Estate		Commercial Non Real Estate		Agriculture		Consumer		Other		Total
Allowance for loan losses
Individually evaluated for impairment	$	2,581	$	2,879	$	6,712	$	3,743	$	45	$	—	$	15,960
Collectively evaluated for impairment	2,461		11,952		10,238		9,623		308		873		35,455
Loans acquired with deteriorated credit quality	1,510		1,255		—		—		—		—		2,765
Loans acquired without deteriorated credit quality	—		1,750		—		—		—		—		1,750
Total allowance	$	6,552	$	17,836	$	16,950	$	13,366	$	353	$	873	$	55,930
Financing Receivables
Individually evaluated for impairment	$	9,125	$	47,069	$	67,369	$	43,113	$	165	$	—	$	166,841
Collectively evaluated for impairment	709,265		2,225,924		1,140,921		1,411,741		72,421		38,901		5,599,173
Loans acquired with deteriorated credit quality	86,569		23,402		2,889		1,567		1,374		—		115,801
Loans acquired without deteriorated credit quality	98,071		65,918		5,445		17,683		1,304		—		188,421
Loans Outstanding	$	903,030	$	2,362,313	$	1,216,624	$	1,474,104	$	75,264	$	38,901	$	6,070,236

As of September 30, 2014	Residential Real Estate		Commercial Real Estate		Commercial Non Real Estate		Agriculture		Consumer		Other		Total
Allowance for loan losses
Individually evaluated for impairment	$	2,528	$	1,953	$	3,909	$	1,152	$	51	$	—	$	9,593
Collectively evaluated for impairment	3,030		12,034		6,641		9,503		188		823		32,219
Loans acquired with deteriorated credit quality	2,784		645		—		—		25		—		3,454
Loans acquired without deteriorated credit quality	—		2,252		—		—		—		—		2,252
Total allowance	$	8,342	$	16,884	$	10,550	$	10,655	$	264	$	823	$	47,518
Financing Receivables
Individually evaluated for impairment	$	9,384	$	38,457	$	28,298	$	25,655	$	166	$	—	$	101,960
Collectively evaluated for impairment	649,970		1,874,474		1,224,035		1,319,343		85,065		34,243		5,187,130
Loans acquired with deteriorated credit quality	102,987		49,202		6,361		1,746		1,843		—		162,139
Loans acquired without deteriorated credit quality	117,630		95,323		7,409		17,655		2,825		—		240,842
Loans Outstanding	$	879,971	$	2,057,456	$	1,266,103	$	1,364,399	$	89,899	$	34,243	$	5,692,071

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Accounting for Certain Loans Acquired with Deteriorated Credit Quality (Tables)

9 Months Ended

Jun. 30, 2015

Receivables [Abstract]

Troubled Debt Restructurings on Financing Receivables

The re-assessment of purchased impaired loans resulted in the following changes in the accretable yield during the three and nine months ended June 30, 2015 and 2014 (in thousands):

	Three Months Ended June 30,						Nine Months Ended June 30,
	2015			2014			2015			2014
Balance at beginning of period	$	43,431		$	56,415		$	50,889		$	67,660
Accretion	(3,240		)	(4,642		)	(11,249		)	(14,016		)
Reclassification from nonaccretable difference	7,736			227			8,367			3,175
Disposals	(1,038		)	(185		)	(1,118		)	(5,004		)
Balance at end of period	$	46,889		$	51,815		$	46,889		$	51,815

Impaired Financing Receivables

The following table presents the Company’s impaired loans (in thousands). This table excludes loans covered by FDIC loss sharing agreements:

	Recorded Investment		Unpaid Principal Balance		Related Allowance		Average Recorded Investment
As of June 30, 2015
Impaired loans:
With an allowance recorded:
Residential real estate	$	12,481	$	12,678	$	2,582	$	12,294
Commercial real estate	77,015		78,947		3,006		69,585
Commercial non real estate	68,694		78,557		6,733		50,608
Agriculture	53,104		53,541		3,743		44,316
Consumer	224		312		45		252
	$	211,518	$	224,035	$	16,109	$	177,055

	Recorded Investment		Unpaid Principal Balance		Related Allowance		Average Recorded Investment
As of September 30, 2014
Impaired loans:
With an allowance recorded:
Residential real estate	$	12,107	$	12,737	$	2,529	$	13,572
Commercial real estate	62,155		64,597		2,017		84,490
Commercial non real estate	35,522		37,882		3,927		31,827
Agriculture	35,528		37,958		1,155		30,546
Consumer	280		491		51		346
	$	145,592	$	153,665	$	9,679	$	160,781

The following table provides purchased impaired loans at June 30, 2015 and September 30, 2014 (in thousands):

	June 30, 2015						September 30, 2014
	Outstanding Balance 1		Recorded Investment 2		Carrying Value 3		Outstanding Balance 1		Recorded Investment 2		Carrying Value 3
Residential real estate	$	98,677	$	86,569	$	85,059	$	115,863	$	102,987	$	100,203
Commercial real estate	100,075		23,402		22,147		130,825		49,202		48,557
Commercial non real estate	11,092		2,889		2,889		16,697		6,361		6,361
Agriculture	1,567		1,567		1,567		1,747		1,746		1,746
Consumer	1,474		1,374		1,374		2,019		1,843		1,818
Total lending	$	212,885	$	115,801	$	113,036	$	267,151	$	162,139	$	158,685

^{1    Represents the legal balance of loans acquired with deteriorated credit quality.}  

^{2    Represents the book balance of loans acquired with deteriorated credit quality.}  

^{3    Represents the book balance of loans acquired with deteriorated credit quality net of the related allowance for loan losses.} 

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Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Operating activities
Net income	$ 75,253	$ 77,077
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	18,046	27,790
Net gain on sale of securities	(51)	(6)
Net gain on sale of loans	(5,027)	(3,885)
Net (gain) loss on sale of premises and equipment	(1,681)	1,417
Net gain from sale of repossessed property and other assets	(1,836)	(2,413)
Provision (recovery) for loan losses	17,408	(2,065)
Provision for repossessed assets	5,564	8,997
Proceeds from FDIC indemnification claims	1,666	5,330
Stock-based compensation	978	0
Originations of residential real estate loans held-for-sale	(212,144)	(149,001)
Proceeds from sales of residential real estate loans held-for-sale	218,379	150,163
Net deferred income taxes	3,107	(8,743)
Changes in:
Accrued interest receivable	3,081	4,010
Other assets	(1,324)	1,175
FDIC indemnification asset	8,033	8,128
FDIC clawback liability	708	682
Accrued interest payable and other liabilities	4,456	12,145
Net cash provided by operating activities	134,616	130,801
Investing activities
Purchase of securities available for sale	(327,955)	(148,670)
Proceeds from sales of securities available for sale	55,149	4,450
Proceeds from maturities of securities available for sale	205,609	229,275
Net increase in loans	(475,421)	(351,360)
Purchase of premises and equipment	(2,108)	(2,263)
Proceeds from sale of premises and equipment	2,765	743
Proceeds from sale of other assets	31,329	28,141
Purchase of FHLB stock	(365)	(1,649)
Net cash used in investing activities	(510,997)	(241,333)
Financing activities
Net increase in deposits	305,508	118,904
Net decrease in securities sold under agreements to repurchase	(128)	(31,942)
Net increase in FHLB advances and other borrowings	15,426	44,490
Dividends paid	(13,893)	(68,000)
Net cash provided by financing activities	306,913	63,452
Net decrease in cash and due from banks	(69,468)	(47,080)
Cash and due from banks, beginning of period	256,639	282,157
Cash and due from banks, end of period	187,171	235,077
Supplemental disclosures of cash flows information
Cash payments for interest	23,650	25,484
Cash payments for income taxes	42,088	45,520
Supplemental schedules of noncash investing and financing activities
Loans transferred to repossessed assets and other assets	$ 7,447	$ 31,493

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FDIC Indemnification Asset (Tables)

9 Months Ended

Jun. 30, 2015

Banking and Thrift [Abstract]

FDIC indemnification asset roll forward

The following table represents a summary of the activity related to the FDIC indemnification asset for the three and nine months ended June 30, 2015 and 2014 (in thousands):

	Three Months Ended June 30,						Nine Months Ended June 30,
	2015			2014			2015			2014
Balance at beginning of period	$	19,895		$	37,775		$	26,678		$	45,690
Amortization	(1,754		)	(3,256		)	(6,347		)	(11,203		)
Changes in expected reimbursements from FDIC for changes in expected credit losses	15			958			(175		)	550
Changes in reimbursable expenses	(1,148		)	(280		)	(1,511		)	2,525
Payments to/(from) the FDIC	(29		)	(2,965		)	(1,666		)	(5,330		)
Balance at end of period	$	16,979		$	32,232		$	16,979		$	32,232

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Stock-Based Compensation - Schedule of Restricted and Performance Stock (Details) - Jun. 30, 2015 - $ / shares	Total
Restricted shares
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Shares, October 1, 2014 (shares)	0
Granted (shares)	81,419
Vested and issued (shares)	0
Forfeited (shares)	(556)
Canceled (shares)	0
Shares, June 30, 2015 (shares)	80,863
Vested, but not issuable (shares)	12,221
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Shares, October 1, 2014 USD per share)	$ 0.00
Granted (in USD per share)	18.18
Vested and issued (in USD per share)	0.00
Forfeited (in USD per share)	18.00
Canceled (in USD per share)	0.00
Shares, June 30, 2015 (in USD per share)	18.18
Vested, but not issuable (in USD per share)	$ 18.00
Performance shares
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Shares, October 1, 2014 (shares)	0
Granted (shares)	221,294
Vested and issued (shares)	0
Forfeited (shares)	(7,761)
Canceled (shares)	0
Shares, June 30, 2015 (shares)	213,533
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Shares, October 1, 2014 USD per share)	$ 0.00
Granted (in USD per share)	18.00
Vested and issued (in USD per share)	0.00
Forfeited (in USD per share)	18.00
Canceled (in USD per share)	0.00
Shares, June 30, 2015 (in USD per share)	$ 18.00

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Fair Value of Financial Instruments (Tables)

9 Months Ended

Jun. 30, 2015

Fair Value Disclosures [Abstract]

Schedule of Fair Value Measurements, Assets and Liabilities

The following table presents the fair value measurements of assets and liabilities recognized in the accompanying consolidated balance sheets measured at fair value on a recurring basis and the level within the fair value hierarchy in which the fair value measurements fall at June 30, 2015 and September 30, 2014 (in thousands):

	Fair Value		Level 1		Level 2		Level 3
As of June 30, 2015
U.S. Treasury securities	$	303,132	$	303,132	$	—	$	—
U.S. Agency securities	74,375		74,375		—		—
Mortgage-backed securities	1,025,026		—		1,025,026		—
States and political subdivision securities	1,864		—		30		1,834
Corporate debt securities	5,030		—		5,030		—
Other	1,048		—		1,048		—
Securities available for sale	$	1,410,475	$	377,507	$	1,031,134	$	1,834
Derivatives-assets	$	1	$	—	$	1	$	—
Derivatives-liabilities	24,426		—		24,426		—
Fair value loans and written loan commitments	1,063,665		—		1,063,665		—
	Fair Value		Level 1		Level 2		Level 3
As of September 30, 2014
U.S. Treasury securities	$	222,725	$	222,725	$	—	$	—
U.S. Agency securities	—		—		—		—
Mortgage-backed securities	1,103,415		—		1,103,415		—
States and political subdivision securities	2,189		—		160		2,029
Corporate debt securities	11,873		—		11,873		—
Other	1,040		—		1,040		—
Securities available for sale	$	1,341,242	$	222,725	$	1,116,488	$	2,029
Derivatives-assets	$	19	$	—	$	19	$	—
Derivatives-liabilities	13,092		—		13,092		—
Fair value loans and written loan commitments	985,411		—		985,411		—

Schedule of Available-for-Sale Securities Reconciliation

The following table presents the changes in Level 3 financial instruments for the three months ended June 30, 2015 and 2014 (in thousands):

	Other Securities Available for Sale
Balance as of March 31, 2015	$	1,958
Principal paydown	(124		)
Balance as of June 30, 2015	$	1,834
Balance as of March 31, 2014	$	2,243
Principal paydown	—
Balance as of June 30, 2014	$	2,243

The following table presents the changes in Level 3 financial instruments for the nine months ended June 30, 2015 and 2014 (in thousands):

	Other Securities Available for Sale
Balance as of September 30, 2014	$	2,029
Principal paydown	(195		)
Balance as of June 30, 2015	$	1,834
Balance as of September 30, 2013	$	2,243
Principal paydown	—
Balance as of June 30, 2014	$	2,243

Mortgage Loans Held-for-Sale, Fair Value Measurement

The following tables present the fair value measurement of assets and liabilities measured at fair value on a nonrecurring basis and the level within the fair value hierarchy in which the fair value measurements fall at June 30, 2015 and September 30, 2014 (in thousands):

	Fair Value		Level 1		Level 2		Level 3
As of June 30, 2015
Other real estate owned	$	13,051	$	—	$	—	$	13,051
Impaired loans	166,841		—		—		166,841
Loans held for sale, at lower of cost or fair value	9,173		—		9,173		—
As of September 30, 2014
Other real estate owned	$	36,879	$	—	$	—	$	36,879
Impaired loans	111,265		—		—		111,265
Loans held for sale, at lower of cost or fair value	10,381		—		10,381		—

Mortgage Loans Held-for-Sale, Recurring and Nonrecurring Fair Value Measurements

The valuation techniques and significant unobservable inputs used to measure Level 3 fair value measurements at June 30, 2015 were as follows (in thousands):

Financial Instrument	Fair Value of Assets / (Liabilities) at June 30, 2015		Valuation Technique(s)	Unobservable Input	Range	Weighted Average
Other real estate owned	$	13,051	Appraisal value	Property specific adjustment	N/A	N/A
Impaired loans	$	166,841	Appraisal value	Property specific adjustment	N/A	N/A

Fair Value, by Balance Sheet Grouping

Fair values for balance sheet instruments as of June 30, 2015 and September 30, 2014, are as follows (in thousands):

		June 30, 2015				September 30, 2014
	Level in Fair Value Hierarchy	Carrying Amount		Fair Value		Carrying Amount		Fair Value
Assets
Cash and due from banks	Level 1	$	187,171	$	187,171	$	256,639	$	256,639
Loans, net excluding fair valued loans and loans held for sale	Level 3	6,116,471		6,099,234		5,744,157		5,734,274
Accrued interest receivable	Level 2	39,528		39,528		42,609		42,609
Federal Home Loan Bank stock	Level 2	36,287		36,287		35,922		35,922
Liabilities
Deposits	Level 3	$	7,357,688	$	7,384,060	$	7,052,180	$	7,057,591
FHLB advances, related party notes payable, and other borrowings	Level 2	631,815		624,431		616,389		604,615
Securities sold under repurchase agreements	Level 2	161,559		161,559		161,687		161,687
Accrued interest payable	Level 2	4,211		4,211		5,273		5,273
Subordinated debentures	Level 2	56,083		56,071		56,083		56,084

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Loans - Composition of the Loan Portfolio by Internal Risk Rating (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Sep. 30, 2014
Financing Receivable, Recorded Investment [Line Items]
Total financing receivables	$ 6,085,813	$ 5,574,881
Loans covered by FDIC loss share agreements	102,203	234,036
Total	6,188,016	5,808,917
Pass
Financing Receivable, Recorded Investment [Line Items]
Total financing receivables	5,577,672	5,159,494
Watchlist
Financing Receivable, Recorded Investment [Line Items]
Total financing receivables	322,256	287,723
Substandard
Financing Receivable, Recorded Investment [Line Items]
Total financing receivables	182,756	125,830
Doubtful
Financing Receivable, Recorded Investment [Line Items]
Total financing receivables	2,894	1,659
Loss
Financing Receivable, Recorded Investment [Line Items]
Total financing receivables	235	175
Residential real estate
Financing Receivable, Recorded Investment [Line Items]
Total financing receivables	811,578	764,754
Loans covered by FDIC loss share agreements	102,203	127,115
Total	913,781	891,869
Residential real estate | Pass
Financing Receivable, Recorded Investment [Line Items]
Total financing receivables	794,153	747,485
Residential real estate | Watchlist
Financing Receivable, Recorded Investment [Line Items]
Total financing receivables	5,142	5,320
Residential real estate | Substandard
Financing Receivable, Recorded Investment [Line Items]
Total financing receivables	11,895	11,290
Residential real estate | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Total financing receivables	384	659
Residential real estate | Loss
Financing Receivable, Recorded Investment [Line Items]
Total financing receivables	4	0
Commercial real estate
Financing Receivable, Recorded Investment [Line Items]
Total financing receivables	2,413,176	2,003,838
Loans covered by FDIC loss share agreements	0	95,467
Total	2,413,176	2,099,305
Commercial real estate | Pass
Financing Receivable, Recorded Investment [Line Items]
Total financing receivables	2,260,026	1,867,866
Commercial real estate | Watchlist
Financing Receivable, Recorded Investment [Line Items]
Total financing receivables	98,836	84,132
Commercial real estate | Substandard
Financing Receivable, Recorded Investment [Line Items]
Total financing receivables	54,109	51,692
Commercial real estate | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Total financing receivables	205	148
Commercial real estate | Loss
Financing Receivable, Recorded Investment [Line Items]
Total financing receivables	0	0
Commercial non real estate
Financing Receivable, Recorded Investment [Line Items]
Total financing receivables	1,264,583	1,312,658
Loans covered by FDIC loss share agreements	0	9,390
Total	1,264,583	1,322,048
Commercial non real estate | Pass
Financing Receivable, Recorded Investment [Line Items]
Total financing receivables	1,147,017	1,218,558
Commercial non real estate | Watchlist
Financing Receivable, Recorded Investment [Line Items]
Total financing receivables	51,606	65,628
Commercial non real estate | Substandard
Financing Receivable, Recorded Investment [Line Items]
Total financing receivables	64,768	27,499
Commercial non real estate | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Total financing receivables	1,192	798
Commercial non real estate | Loss
Financing Receivable, Recorded Investment [Line Items]
Total financing receivables	0	175
Agriculture
Financing Receivable, Recorded Investment [Line Items]
Total financing receivables	1,482,311	1,369,549
Loans covered by FDIC loss share agreements	0	2,004
Total	1,482,311	1,371,553
Agriculture | Pass
Financing Receivable, Recorded Investment [Line Items]
Total financing receivables	1,262,624	1,202,145
Agriculture | Watchlist
Financing Receivable, Recorded Investment [Line Items]
Total financing receivables	166,583	132,262
Agriculture | Substandard
Financing Receivable, Recorded Investment [Line Items]
Total financing receivables	51,761	35,107
Agriculture | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Total financing receivables	1,112	35
Agriculture | Loss
Financing Receivable, Recorded Investment [Line Items]
Total financing receivables	231	0
Consumer
Financing Receivable, Recorded Investment [Line Items]
Total financing receivables	75,264	89,839
Loans covered by FDIC loss share agreements	0	60
Total	75,264	89,899
Consumer | Pass
Financing Receivable, Recorded Investment [Line Items]
Total financing receivables	74,951	89,197
Consumer | Watchlist
Financing Receivable, Recorded Investment [Line Items]
Total financing receivables	89	381
Consumer | Substandard
Financing Receivable, Recorded Investment [Line Items]
Total financing receivables	223	242
Consumer | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Total financing receivables	1	19
Consumer | Loss
Financing Receivable, Recorded Investment [Line Items]
Total financing receivables	0	0
Other
Financing Receivable, Recorded Investment [Line Items]
Total financing receivables	38,901	34,243
Loans covered by FDIC loss share agreements	0	0
Total	38,901	34,243
Other | Pass
Financing Receivable, Recorded Investment [Line Items]
Total financing receivables	38,901	34,243
Other | Watchlist
Financing Receivable, Recorded Investment [Line Items]
Total financing receivables	0	0
Other | Substandard
Financing Receivable, Recorded Investment [Line Items]
Total financing receivables	0	0
Other | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Total financing receivables	0	0
Other | Loss
Financing Receivable, Recorded Investment [Line Items]
Total financing receivables	$ 0	$ 0

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Securities Sold Under Agreements to Repurchase - (Narrative) (Details) - USD ($) $ in Millions	9 Months Ended
	Jun. 30, 2015	Sep. 30, 2014
Offsetting Assets [Line Items]
Securities sold under agreements to repurchase	$ 170.5	$ 190.6
Securities sold under agreements to repurchase, fair value of collateral	$ 170.5	$ 188.6
Securities sold under agreements to repurchase, collateral, percentage of borrowed funds	102.00%
Minimum
Offsetting Assets [Line Items]
Securities sold under agreements to repurchase, maturity period	1 day
Maximum
Offsetting Assets [Line Items]
Securities sold under agreements to repurchase, maturity period	4 days

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Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2015	Sep. 30, 2014
Assets
Cash and due from banks	$ 187,171	$ 256,639
Securities available for sale	1,410,475	1,341,242
Investment in affiliates	1,683	1,683
Loans, net of allowance for loan losses of $55,930 and $47,518 at June 30, 2015 and September 30, 2014, respectively (includes $102,203 and $234,036 of loans covered by FDIC loss share agreements at June 30, 2015 and September 30, 2014, respectively, $1,063,665 and $985,411 of loans and written loan commitments carried at fair value under the fair value option at June 30, 2015 and September 30, 2014, respectively, and $9,173 and $10,381 of loans held for sale at June 30, 2015 and September 30, 2014, respe	7,189,309	6,739,949
Premises and equipment	98,235	103,707
Accrued interest receivable	39,528	42,609
Other repossessed property (includes $205 and $10,628 of property covered under FDIC loss share agreements at June 30, 2015 and September 30, 2014, respectively)	21,969	49,580
FDIC indemnification asset	16,979	26,678
Goodwill	697,807	697,807
Core deposits and other intangibles	7,827	14,229
Net deferred tax assets	38,884	44,703
Other assets	54,292	52,603
Total assets	9,764,159	9,371,429
Deposits:
Noninterest-bearing	1,360,722	1,303,015
Interest-bearing	5,996,966	5,749,165
Total deposits	7,357,688	7,052,180
Securities sold under agreements to repurchase	161,559	161,687
FHLB advances and other borrowings	590,520	575,094
Related party notes payable	41,295	41,295
Subordinated debentures	56,083	56,083
Fair value of derivatives	24,426	13,092
Accrued interest payable	4,211	5,273
Income tax payable	0	4,915
Accrued expenses and other liabilities	40,526	40,720
Total liabilities	8,276,308	7,950,339
Stockholders' equity
Common stock, $0.01 par value, authorized 500,000,000 shares; issued and outstanding at June 30, 2015 and September 30, 2014 - 57,886,114 shares	579	579
Additional paid-in capital	1,261,102	1,260,124
Retained earnings	227,904	166,544
Accumulated other comprehensive loss	(1,734)	(6,157)
Total stockholders' equity	1,487,851	1,421,090
Total liabilities and stockholders' equity	$ 9,764,159	$ 9,371,429

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Securities Available for Sale - (Narrative) (Details)	3 Months Ended		9 Months Ended
	Jun. 30, 2015 USD ($) security	Jun. 30, 2014 USD ($)	Jun. 30, 2015 USD ($) security	Jun. 30, 2014 USD ($)	Sep. 30, 2014 USD ($) security
Investments, Debt and Equity Securities [Abstract]
Proceeds from sales of securities available for sale	$ 0	$ 0	$ 55,149,000	$ 4,450,000
Available-for-sale securities, gross realized gains	0	0	600,000	0
Available-for-sale securities, gross realized losses	0	$ 0	500,000	$ 0
Securities pledged as collateral	$ 974,200,000		$ 974,200,000		$ 1,132,300,000
Percentage of investment portfolio in continuous loss position	52.00%		52.00%		64.00%
Number of securities in an unrealized loss position (securities) | security	47		47		49
Federal home loan bank stock	$ 36,300,000		$ 36,300,000		$ 35,900,000

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Consolidated Statement of Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Comprehensive Income	Common Stock Par Value	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Loss
Beginning balance at Sep. 30, 2013	$ 1,417,214		$ 579	$ 1,260,124	$ 163,592	$ (7,081)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	77,077	$ 77,077			77,077
Other comprehensive income, net of tax:
Net change in net unrealized gain on securities available for sale	4,673	4,673				4,673
Comprehensive income	81,750	81,750
Common stock, $1.17 and $0.24 in FY 2014 and FY 2015, respectively	(68,000)				(68,000)
Ending balance at Jun. 30, 2014	1,430,964		579	1,260,124	172,669	(2,408)
Beginning balance at Sep. 30, 2014	1,421,090		579	1,260,124	166,544	(6,157)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	75,253	75,253			75,253
Other comprehensive income, net of tax:
Net change in net unrealized gain on securities available for sale	4,423	4,423				4,423
Comprehensive income	79,676	$ 79,676
Stock-based compensation	978			978
Common stock, $1.17 and $0.24 in FY 2014 and FY 2015, respectively	(13,893)				(13,893)
Ending balance at Jun. 30, 2015	$ 1,487,851		$ 579	$ 1,261,102	$ 227,904	$ (1,734)

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Allowance for Loan Losses - Summary of Allowance for Loan Losses by Type (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Mar. 31, 2015	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Sep. 30, 2013
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually evaluated for impairment	$ 15,960		$ 9,593
Collectively evaluated for impairment	35,455		32,219
Total allowance	55,930	$ 52,426	47,518	$ 47,038	$ 47,153	$ 55,864
Financing Receivables
Individually evaluated for impairment	166,841		101,960
Collectively evaluated for impairment	5,599,173		5,187,130
Loans Outstanding	6,070,236		5,692,071
Residential real estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually evaluated for impairment	2,581		2,528
Collectively evaluated for impairment	2,461		3,030
Total allowance	6,552	7,495	8,342	10,414	10,277	11,779
Financing Receivables
Individually evaluated for impairment	9,125		9,384
Collectively evaluated for impairment	709,265		649,970
Loans Outstanding	903,030		879,971
Commercial real estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually evaluated for impairment	2,879		1,953
Collectively evaluated for impairment	11,952		12,034
Total allowance	17,836	15,736	16,884	18,055	17,603	22,562
Financing Receivables
Individually evaluated for impairment	47,069		38,457
Collectively evaluated for impairment	2,225,924		1,874,474
Loans Outstanding	2,362,313		2,057,456
Commercial non real estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually evaluated for impairment	6,712		3,909
Collectively evaluated for impairment	10,238		6,641
Total allowance	16,950	15,957	10,550	9,587	10,275	11,222
Financing Receivables
Individually evaluated for impairment	67,369		28,298
Collectively evaluated for impairment	1,140,921		1,224,035
Loans Outstanding	1,216,624		1,266,103
Agriculture
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually evaluated for impairment	3,743		1,152
Collectively evaluated for impairment	9,623		9,503
Total allowance	13,366	12,222	10,655	7,740	7,903	9,296
Financing Receivables
Individually evaluated for impairment	43,113		25,655
Collectively evaluated for impairment	1,411,741		1,319,343
Loans Outstanding	1,474,104		1,364,399
Consumer
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually evaluated for impairment	45		51
Collectively evaluated for impairment	308		188
Total allowance	353	189	264	392	430	312
Financing Receivables
Individually evaluated for impairment	165		166
Collectively evaluated for impairment	72,421		85,065
Loans Outstanding	75,264		89,899
Other
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually evaluated for impairment	0		0
Collectively evaluated for impairment	873		823
Total allowance	873	$ 827	823	$ 850	$ 665	$ 693
Financing Receivables
Individually evaluated for impairment	0		0
Collectively evaluated for impairment	38,901		34,243
Loans Outstanding	38,901		34,243
Receivables acquired with deteriorated credit quality
Financing Receivable, Allowance for Credit Losses [Line Items]
Total allowance	2,765		3,454
Financing Receivables
Loans Outstanding	115,801		162,139
Receivables acquired with deteriorated credit quality | Residential real estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Total allowance	1,510		2,784
Financing Receivables
Loans Outstanding	86,569		102,987
Receivables acquired with deteriorated credit quality | Commercial real estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Total allowance	1,255		645
Financing Receivables
Loans Outstanding	23,402		49,202
Receivables acquired with deteriorated credit quality | Commercial non real estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Total allowance	0		0
Financing Receivables
Loans Outstanding	2,889		6,361
Receivables acquired with deteriorated credit quality | Agriculture
Financing Receivable, Allowance for Credit Losses [Line Items]
Total allowance	0		0
Financing Receivables
Loans Outstanding	1,567		1,746
Receivables acquired with deteriorated credit quality | Consumer
Financing Receivable, Allowance for Credit Losses [Line Items]
Total allowance	0		25
Financing Receivables
Loans Outstanding	1,374		1,843
Receivables acquired with deteriorated credit quality | Other
Financing Receivable, Allowance for Credit Losses [Line Items]
Total allowance	0		0
Financing Receivables
Loans Outstanding	0		0
Receivables acquired without deteriorated credit quality
Financing Receivable, Allowance for Credit Losses [Line Items]
Total allowance	1,750		2,252
Financing Receivables
Loans Outstanding	188,421		240,842
Receivables acquired without deteriorated credit quality | Residential real estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Total allowance	0		0
Financing Receivables
Loans Outstanding	98,071		117,630
Receivables acquired without deteriorated credit quality | Commercial real estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Total allowance	1,750		2,252
Financing Receivables
Loans Outstanding	65,918		95,323
Receivables acquired without deteriorated credit quality | Commercial non real estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Total allowance	0		0
Financing Receivables
Loans Outstanding	5,445		7,409
Receivables acquired without deteriorated credit quality | Agriculture
Financing Receivable, Allowance for Credit Losses [Line Items]
Total allowance	0		0
Financing Receivables
Loans Outstanding	17,683		17,655
Receivables acquired without deteriorated credit quality | Consumer
Financing Receivable, Allowance for Credit Losses [Line Items]
Total allowance	0		0
Financing Receivables
Loans Outstanding	1,304		2,825
Receivables acquired without deteriorated credit quality | Other
Financing Receivable, Allowance for Credit Losses [Line Items]
Total allowance	0		0
Financing Receivables
Loans Outstanding	$ 0		$ 0

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Core Deposits and Other Intangibles (Tables)

9 Months Ended

Jun. 30, 2015

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Finite-lived Intangible Assets

A summary of intangible assets subject to amortization is as follows (in thousands):

	Core Deposit Intangible			Brand Intangible			Customer Relationships Intangible			Total
As of June 30, 2015
Gross carrying amount	$	92,679		$	8,464		$	16,089		$	117,232
Accumulated amortization	(91,980		)	(3,995		)	(13,430		)	(109,405		)
Net intangible assets	$	699		$	4,469		$	2,659		$	7,827
As of September 30, 2014
Gross carrying amount	$	92,679		$	8,464		$	16,089		$	117,232
Accumulated amortization	(87,423		)	(3,572		)	(12,008		)	(103,003		)
Net intangible assets	$	5,256		$	4,892		$	4,081		$	14,229

Schedule of Finite-lived Intangible Assets, Future Amortization Expense

Estimated amortization expense of intangible assets in subsequent fiscal years is as follows (in thousands):

Remaining in 2015	$	709
2016	2,822
2017	1,097
2018	564
2019	564
2020 and thereafter	2,071
	$	7,827

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Derivative Financial Instruments - Effect on the Consolidated Statement of Comprehensive Income (Details) - Noninterest income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Interest rate swaps
Derivative [Line Items]
Amount of Gain (Loss) Recognized in Income	$ 18,946	$ (17,797)	$ (27,357)	$ (25,396)
Mortgage loan commitments
Derivative [Line Items]
Amount of Gain (Loss) Recognized in Income	(26)	6	1	40
Mortgage loan forward sale contracts
Derivative [Line Items]
Amount of Gain (Loss) Recognized in Income	$ 26	$ (6)	$ (1)	$ (40)

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Income Taxes

9 Months Ended

Jun. 30, 2015

Income Tax Disclosure [Abstract]

Income Taxes

Income Taxes

The provision for income taxes charged to operations consists of the following for the three and nine months ended June 30, 2015 and 2014 (in thousands):

	Three Months Ended June 30,					Nine Months Ended June 30,
	2015		2014			2015		2014
Currently paid or payable
Federal	$	5,600	$	16,800		$	29,611	$	43,760
State	2,098		2,588			5,575		6,545
	7,698		19,388			35,186		50,305
Deferred tax (benefit) expense	7,173		(7,254		)	3,107		(8,743		)
Income tax expense	$	14,871	$	12,134		$	38,293	$	41,562

The income tax provision differs from the amount of income tax determined by applying the U.S. federal income tax rate to pretax income due to the following for the three and nine months ended June 30, 2015 and 2014 (in thousands):

	Three Months Ended June 30,						Nine Months Ended June 30,
	2015			2014			2015			2014
Computed “expected” tax expense (35%)	$	15,296		$	12,122		$	39,741		$	41,523
Increase (decrease) in income taxes resulting from:
Tax exempt interest income	(1,573		)	(1,263		)	(4,789		)	(3,539		)
State income taxes, net of federal benefit	1,363			1,682			3,623			4,254
Other	(215		)	(407		)	(282		)	(676		)
Actual tax expense	$	14,871		$	12,134		$	38,293		$	41,562

Net deferred tax assets (liabilities) consist of the following components at June 30, 2015 and September 30, 2014 (in thousands):

	June 30, 2015			September 30, 2014
Deferred tax assets:
Allowance for loan losses	$	22,796		$	19,683
Compensation	705			329
Net operating loss carryforward	81			119
Securities available for sale	1,046			3,758
Other real estate owned	8,880			13,721
Core deposit intangible and other fair value adjustments	11,351			10,573
Excess tax basis of loans acquired over carrying value	4,630			9,595
Other	6,023			6,272
Total deferred tax assets	55,512			64,050
Deferred tax liabilities:
Goodwill and other intangibles	(11,995		)	(9,099		)
Premises and equipment	(3,131		)	(4,390		)
Excess carrying value of FDIC indemnification asset and clawback liability	(326		)	(4,280		)
Other	(1,176		)	(1,578		)
Total deferred tax liabilities	(16,628		)	(19,347		)
Net deferred tax assets	$	38,884		$	44,703

At June 30, 2015, the Company had income tax receivable of $1.4 million from the Internal Revenue Service and at September 30, 2014, had income tax payable of $4.9 million to National Americas Investment, Inc., which was subsequently dissolved (included in income tax payable).

Management has determined a valuation reserve is not required for the deferred tax assets because it is more likely than not these assets could be realized through carry back to taxable income in prior years, future reversals of existing taxable temporary differences, and future taxable income.

Uncertain tax positions were not significant at June 30, 2015 or September 30, 2014.

The Company is no longer subject to U.S. federal, state and local or non-U.S. income tax examinations by tax authorities for years before 2009. In July 2014, the IRS issued the final report on their examination of federal income tax returns for the periods ended September 30, 2010 and 2011.  The results of the examination did not have a material effect on our financial condition or results of operations.

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Securities Sold Under Agreements to Repurchase (Tables)

9 Months Ended

Jun. 30, 2015

Federal Funds Purchased and Securities Sold under Agreements to Repurchase [Abstract]

Schedule of Repurchase Agreements

The following tables present the gross obligation by the class of collateral pledged and the remaining contractual maturity of the agreements at June 30, 2015 and September 30, 2014 (in thousands).

	June 30, 2015
	Remaining Contractual Maturity of the Agreements
	Overnight and Continuous		Up to 30 Days		30-90 Days		Greater than 90 Days		Total
Repurchase agreements
US Treasury and agency securities	$	52,402	$	—	$	—	$	—	$	52,402
Mortgage-backed securities	106,209		—		—		2,948		109,157
Total repurchase agreements	$	158,611	$	—	$	—	$	2,948	$	161,559

	September 30, 2014
	Remaining Contractual Maturity of the Agreements
	Overnight and Continuous		Up to 30 Days		30-90 Days		Greater than 90 Days		Total
Repurchase agreements
US Treasury and agency securities	$	8,469	$	—	$	—	$	—	$	8,469
Mortgage-backed securities	149,511		—		—		3,707		153,218
Total repurchase agreements	$	157,980	$	—	$	—	$	3,707	$	161,687

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Stock-Based Compensation

9 Months Ended

Jun. 30, 2015

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

Stock-Based Compensation

Stock-Based Compensation

On September 26, 2014, the Board of Directors adopted, and on October 10, 2014 NAB, at that time our controlling shareholder, approved the Great Western Bancorp, Inc. 2014 Omnibus Incentive Compensation Plan (the “2014 Plan”), the Great Western Bancorp, Inc. 2014 Non-Employee Director Plan (the “2014 Director Plan”), and the Great Western Bancorp, Inc. Executive Incentive Compensation Plan (the “Bonus Plan”), collectively ("the Plans"), which provide for the issuance of restricted share units and performance based share units to certain officers, employees and directors of the Company. The Plans were primarily established to enhance the Company’s ability to attract, retain and motivate employees. The Company’s Board of Directors, the Compensation Committee of the Board of Directors ("Compensation Committee"), or executive management upon delegation of the Compensation Committee has exclusive authority to select the employees and others, including directors, to receive the awards and to establish the terms and conditions of each award made pursuant to the Company’s stock-based compensation plans.

Stock units issued under the Company’s restricted and performance based stock plans may not be sold or otherwise transferred until the vesting period (typically 3 years) has been met and/or performance objectives have been obtained. During the vesting periods, participants do not have voting rights and dividends are accumulated until the time upon which the award vests. Upon specified events, as defined in the Plans, stock unit awards that have not vested and/or performance hurdles that have not been met will be forfeited.

Based on the substantive terms of each award, restricted and performance-based awards are classified as equity awards and accounted for under the Treasury method. The fair value of equity-classified awards is based on the market price of the stock on the measurement date and is amortized as compensation expense on a straight-line basis over the vesting or performance period.

Stock based compensation is recognized based on the number of awards that are ultimately expected to vest. Forfeitures are estimated based on historical turnover experience of qualified employees. For performance-based stock awards, an estimate is made of the number of shares expected to vest as a result of actual performance against the performance targets to determine the amount of compensation expense to be recognized. The estimate is reevaluated quarterly and total compensation expense is adjusted for any change in the current period. Stock-based compensation expense is included in salaries and employee benefits expense in the consolidated statements of comprehensive income. For the three months ended June 30, 2015 and 2014, stock compensation expense was $0.3 million and $0.0 million, respectively. For the nine months ended June 30, 2015 and 2014, stock compensation expense was $1.0 million and $0.0 million, respectively. Related income tax benefits recognized for the three months ended June 30, 2015 and 2014 were $0.1 million and $0.0 million, respectively and $0.4 million and $0.0 million for the nine months ended June 30, 2015 and 2014, respectively.

The following is a summary of the Plans’ restricted share and performance-based stock award activity as of June 30, 2015:

Restricted Shares	Common Shares		Weighted-Average Grant Date Fair Value
Restricted shares, October 1, 2014	—		$	—
Granted	81,419		18.18
Vested and issued	—		—
Forfeited	(556	)	18.00
Canceled	—		—
Restricted shares, June 30, 2015	80,863		$	18.18
Vested, but not issuable at June 30, 2015	12,221		$	18.00
Performance Shares
Performance shares, October 1, 2014	—		$	—
Granted	221,294		18.00
Vested and issued	—		—
Forfeited	(7,761	)	18.00
Canceled	—		—
Performance shares, June 30, 2015	213,533		$	18.00

The number of performance shares granted is reflected in the above table at the 100% target performance level. The actual performance-based award payouts will vary based on the achievement of the pre-established targets and can range from 0% to 150% of the target amount. The outstanding number of performance shares reflected in the table represents the number of shares expected to be awarded based on estimated achievement of the goals as of year end. However, at June 30, 2015, the maximum number of performance-based shares that could be issued if performance is attained at 150% of target based on the grants made to date was approximately 320,300 shares.

As of June 30, 2015, there was $2.3 million of unrecognized compensation cost related to nonvested restricted stock awards expected to be recognized over a period of 2.25 years.

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The Fair Value Option - Schedule of Fair Value Option (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net increase (decrease) in fair value of loans at fair value	$ (24,394)	$ 13,886	$ 7,914	$ 13,506
Long-term loans and written loan commitments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net increase (decrease) in fair value of loans at fair value	(24,394)	13,886	7,914	13,506
Noninterest Income (Loss) | Long-term loans and written loan commitments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net increase (decrease) in fair value of loans at fair value	$ (24,394)	$ 13,886	$ 7,914	$ 13,506

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Consolidated Statement of Stockholders' Equity (Unaudited) (Parenthetical) - $ / shares	9 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Statement of Stockholders' Equity [Abstract]
Cash dividends paid on common stock (in USD per share)	$ 0.24	$ 1.17

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Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2015	Sep. 30, 2014
Statement of Financial Position [Abstract]
Allowance for loan losses	$ 55,930	$ 47,518
Loans covered by FDIC loss share agreements	102,203	234,036
Loans and written loan commitments at fair value under the fair value option	1,063,665	985,411
Loan held for sale	9,173	10,381
Property covered under FDIC loss share agreements	$ 205	$ 10,628
Common stock, par value (in USD per share)	$ 0.01	$ 0.01
Common stock, shares authorized	500,000,000	500,000,000
Common stock, shares issued	57,886,114	57,886,114
Common stock, shares outstanding	57,886,114	57,886,114

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Derivative Financial Instruments

9 Months Ended

Jun. 30, 2015

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Derivative Financial Instruments

Derivative Financial Instruments

In the normal course of business, the Company uses interest rate swaps to manage its interest rate risk and market risk in accommodating the needs of its customers. Also, the Company enters into interest rate lock commitments on mortgage loans to be held for sale, with corresponding forward sales contracts related to these interest rate lock commitments.

Derivative instruments are recognized as either assets or liabilities in the accompanying consolidated financial statements and are measured at fair value.

The following table summarizes the notional amounts and estimated fair values of the Company’s derivative instruments at June 30, 2015 and September 30, 2014 (in thousands).

	June 30, 2015
	Notional Amount		Balance Sheet Location	Positive Fair Value		Negative Fair Value
Derivatives not designated as hedging instruments:
Interest rate swaps	$	1,065,703	Liabilities	$	2,867	$	(27,292	)
Mortgage loan commitments	33,626		Assets	1		—
Mortgage loan forward sale contracts	38,882		Liabilities	—		(1		)

	September 30, 2014
	Notional Amount		Balance Sheet Location	Positive Fair Value		Negative Fair Value
Derivatives not designated as hedging instruments:
Interest rate swaps	$	986,440	Liabilities	$	6,213	$	(19,286	)
Mortgage loan commitments	22,563		Assets	19		—
Mortgage loan forward sale contracts	28,459		Liabilities	—		(19		)

As with any financial instrument, derivative financial instruments have inherent risk including adverse changes in interest rates. The Company’s exposure to derivative credit risk is defined as the possibility of sustaining a loss due to the failure of the counterparty to perform in accordance with the terms of the contract. Credit risks associated with interest rate swaps are similar to those relating to traditional on-balance sheet financial instruments. The Company manages interest rate swap credit risk with the same standards and procedures applied to its commercial lending activities. Amounts due from swap counterparties to reclaim cash collateral under the interest rate swap master netting arrangements have not been offset against the derivative balances.

The effect of derivatives on the consolidated statements of comprehensive income for the three and nine months ended June 30, 2015 and 2014 (in thousands) was as follows:

		Amount of Gain (Loss) Recognized in Income
		Three Months Ended June 30,						Nine Months Ended June 30,
	Location of Gain (Loss) Recognized in Income	2015			2014			2015			2014
Derivatives not designated as hedging instruments:
Interest rate swaps	Noninterest income	$	18,946		$	(17,797	)	$	(27,357	)	$	(25,396	)
Mortgage loan commitments	Noninterest income	(26		)	6			1			40
Mortgage loan forward sale contracts	Noninterest income	26			(6		)	(1		)	(40		)

Netting of Derivatives

The Company has various financial assets and financial liabilities that are subject to enforceable master netting agreements or similar agreements. The Company has entered into an ISDA master netting arrangement with various swap counterparties. Under the terms of the master netting arrangements, all transactions between the Company and the counterparty constitute a single business relationship such that in the event of default, the non-defaulting party is entitled to set off claims and apply property held by that party in respect of any transaction against obligations owed. Any payments, deliveries, or other transfers may be applied against each other and netted.

The table below shows total gross derivative assets and liabilities which are adjusted on an aggregate basis, where applicable to take into consideration the effects of legally enforceable master netting agreements for the net reported amount in the consolidated balance sheets. These amounts are offset on the consolidated balance sheets.

The following tables (in thousands) present the Company's gross derivative financial assets and liabilities at June 30, 2015 and September 30, 2014, and the related impact of enforceable master netting arrangements and cash collateral, where applicable:

	Gross Amount			Amount Offset			Net Amount Presented in Consolidated Balance Sheets			Held/Pledged Financial Instruments1		Net Amount
June 30, 2015
Derivative financial assets:
Derivatives subject to master netting arrangement or similar arrangement	$	2,867		$	(2,867	)	$	—		$	—	$	—
Derivative financial liabilities:
Derivatives subject to master netting arrangement or similar arrangement	(27,292		)	2,867			(24,425		)	24,425		—
Total derivative financial liabilities	$	(24,425	)	$	—		$	(24,425	)	$	24,425	$	—

¹ The actual amount of collateral exceeds the fair value exposure, at the individual counterparty level, as of the date presented.

	Gross Amount			Amount Offset			Net Amount Presented in Consolidated Balance Sheets			Held/Pledged Financial Instruments		Net Amount
September 30, 2014
Derivative financial assets:
Derivatives subject to master netting arrangement or similar arrangement	$	6,213		$	(6,213	)	$	—		$	—	$	—
Derivative financial liabilities:
Derivatives subject to master netting arrangement or similar arrangement	(19,286		)	6,213			(13,073		)	13,073		—
Total derivative financial liabilities	$	(13,073	)	$	—		$	(13,073	)	$	13,073	$	—

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Document and Entity Information - shares	9 Months Ended
	Jun. 30, 2015	Aug. 10, 2015
Document Information [Abstract]
Entity Registrant Name	Great Western Bancorp, Inc.
Entity Central Index Key	0001613665
Current Fiscal Year End Date	--09-30
Entity Filer Category	Non-accelerated Filer
Document Type	10-Q
Document Period End Date	Jun. 30, 2015
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q3
Amendment Flag	false
Entity Common Stock, Shares Outstanding		55,219,596

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The Fair Value Option

9 Months Ended

Jun. 30, 2015

Fair Value Disclosures [Abstract]

The Fair Value Option

The Fair Value Option

The Company has elected to measure certain long-term loans and written loan commitments at fair value to assist in managing the interest rate risk for longer-term loans. This fair value option was elected upon the origination of these loans. Interest income is recognized in the same manner as interest on non-fair value loans.

See Note 17 for additional disclosures regarding the fair value of the fair value option loans and written loan commitments.

Long-term loans and written loan commitments for which the fair value option has been elected had a net favorable difference between the aggregate fair value and the aggregate unpaid loan principal balance and written loan commitment amount of approximately $18.9 million and $7.1 million at June 30, 2015 and September 30, 2014, respectively. The total unpaid principal balance of these long-term loans was approximately $1,044.7 million and $978.3 million at June 30, 2015 and September 30, 2014, respectively. The fair value of these loans and written loan commitments is included in total loans in the consolidated balance sheets and are grouped with commercial non real estate, commercial real estate, and agricultural loans in Note 5. The fair value of these written loan commitments was not material at June 30, 2015 and September 30, 2014, respectively. None of the noted loans were greater than 90 days past due or in nonaccrual status as of June 30, 2015 or September 30, 2014.

Changes in fair value for items for which the fair value option has been elected and the line items in which these changes are reported are as follows for the three and nine months ended June 30, 2015 and 2014 (in thousands):

	For the Three Months Ended										For the Nine Months Ended
	June 30, 2015						June 30, 2014				June 30, 2015				June 30, 2014
	Noninterest Income /(Loss)			Total Changes in Fair Value			Noninterest Income		Total Changes in Fair Value		Noninterest Income		Total Changes in Fair Value		Noninterest Income		Total Changes in Fair Value
Long-term loans and written loan commitments	$	(24,394	)	$	(24,394	)	$	13,886	$	13,886	$	7,914	$	7,914	$	13,506	$	13,506

Of the total change in fair value of long-term loans and written loan commitments, $0.0 million and $0.7 million for the three months ended June 30, 2015 and 2014, respectively, and $0.5 million and $1.4 million for the nine months ended June 30, 2015 and 2014, respectively is attributable to changes in specific credit risk. The gains or losses attributable to changes in instrument-specific credit risk were determined based on an assessment of existing market conditions and credit quality of the underlying loan for the specific portfolio of loans.

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Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Sep. 30, 2014
Deferred tax assets:
Allowance for loan losses	$ 22,796	$ 19,683
Compensation	705	329
Net operating loss carryforward	81	119
Securities available for sale	1,046	3,758
Other real estate owned	8,880	13,721
Core deposit intangible and other fair value adjustments	11,351	10,573
Excess tax basis of loans acquired over carrying value	4,630	9,595
Other	6,023	6,272
Total deferred tax assets	55,512	64,050
Deferred tax liabilities:
Goodwill and other intangibles	(11,995)	(9,099)
Premises and equipment	(3,131)	(4,390)
Excess carrying value of FDIC indemnification asset and clawback liability	(326)	(4,280)
Other	(1,176)	(1,578)
Total deferred tax liabilities	(16,628)	(19,347)
Net deferred tax assets	$ 38,884	$ 44,703

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Earnings per Share - Schedule of EPS, Basic and Diluted (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Net income	$ 28,832	$ 22,502	$ 75,253	$ 77,077
Weighted average common shares outstanding	57,898,335	57,886,114	57,897,484	57,886,114
Dilutive effect of stock based compensation (in shares)	60,867	0	31,704	0
Weighted average common shares outstanding for diluted earnings per share calculation	57,959,202	57,886,114	57,929,188	57,886,114
Basic earnings per share (in dollars per share)	$ 0.50	$ 0.39	$ 1.30	$ 1.33
Diluted earnings per share (in dollars per share)	$ 0.50	$ 0.39	$ 1.30	$ 1.33
Performance shares
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Securities excluded from computation of earnings per share			60,543	0
Stock awards
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Securities excluded from computation of earnings per share			1,244	0

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Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Interest and Fee Income, Loans and Leases [Abstract]
Loans	$ 85,240	$ 80,797	$ 251,978	$ 240,133
Taxable securities	5,984	6,598	17,050	20,190
Nontaxable securities	10	33	36	61
Dividends on securities	489	351	997	751
Federal funds sold and other	155	99	599	400
Total interest and dividend income	91,878	87,878	270,660	261,535
Interest expense
Deposits	5,776	6,319	17,775	19,629
Securities sold under agreements to repurchase	134	153	430	442
FHLB advances and other borrowings	867	751	2,706	2,591
Related party notes payable	233	230	692	690
Subordinated debentures and other	330	325	985	985
Total interest expense	7,340	7,778	22,588	24,337
Net interest income	84,538	80,100	248,072	237,198
Provision (recovery) for loan losses	4,410	1,500	17,408	(2,065)
Net interest income after provision for loan losses	80,128	78,600	230,664	239,263
Noninterest income
Service charges and other fees	9,627	9,695	28,896	29,728
Net gain on sale of loans	1,903	1,322	5,027	3,885
Casualty insurance commissions	333	320	882	877
Investment center income	742	578	1,969	1,757
Net gain on sale of securities	0	0	51	6
Trust department income	897	942	2,903	2,847
Net increase (decrease) in fair value of loans at fair value	(24,394)	13,886	7,914	13,506
Net realized and unrealized gain (loss) on derivatives	18,946	(17,797)	(27,357)	(25,396)
Other	1,951	1,368	4,556	4,070
Total noninterest income	10,005	10,314	24,841	31,280
Noninterest expense
Salaries and employee benefits	26,612	24,126	75,373	71,176
Occupancy expenses, net	3,161	4,894	11,169	13,613
Data processing	4,657	4,354	14,193	14,105
Equipment expenses	1,075	1,077	2,956	3,099
Advertising	1,196	1,213	2,870	3,385
Communication expenses	1,031	1,046	3,429	3,402
Professional fees	3,289	3,620	10,464	9,623
Net (gain) from sale of repossessed property and other assets	(1,452)	(1,564)	(1,836)	(2,413)
Amortization of core deposits and other intangibles	1,776	4,069	6,402	13,448
Other	5,085	11,443	16,939	22,466
Total noninterest expense	46,430	54,278	141,959	151,904
Income before income taxes	43,703	34,636	113,546	118,639
Provision for income taxes	14,871	12,134	38,293	41,562
Net income	28,832	22,502	75,253	77,077
Other comprehensive income (loss) - change in net unrealized gain (loss) on securities available-for-sale (net of deferred income tax (expense) benefit of $2,254 and $(2,946) for the three months ended June 30, 2015 and 2014, respectively and $(2,712) and ($2,684) for the nine months ended June 30, 2015 and 2014, respectively)	(3,845)	4,806	4,423	4,673
Comprehensive income	$ 24,987	$ 27,308	$ 79,676	$ 81,750
Earnings per common share
Weighted average shares outstanding	57,898,335	57,886,114	57,897,484	57,886,114
Earnings per share (in dollars per share)	$ 0.50	$ 0.39	$ 1.30	$ 1.33
Diluted earnings per common share
Weighted average shares outstanding	57,959,202	57,886,114	57,929,188	57,886,114
Diluted earnings per share (in dollars per share)	$ 0.50	$ 0.39	$ 1.30	$ 1.33
Dividends per share
Dividends issued	$ 6,946	$ 34,000	$ 13,893	$ 68,000
Dividends per share (in dollars per share)	$ 0.12	$ 0.59	$ 0.24	$ 1.17

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Securities Available for Sale

9 Months Ended

Jun. 30, 2015

Investments, Debt and Equity Securities [Abstract]

Securities Available for Sale

Securities Available for Sale

The amortized cost and approximate fair value of investments in securities, all of which are classified as available for sale according to management’s intent, are summarized as follows (in thousands):

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
As of June 30, 2015
U.S. Treasury securities	$	300,501	$	2,744	$	(113	)	$	303,132
U.S. Agency securities	74,379		53		(57		)	74,375
Mortgage-backed securities:
Government National Mortgage Association	905,660		2,952		(7,055		)	901,557
Federal National Mortgage Association	47,727		—		(377		)	47,350
Small Business Assistance Program	77,122		—		(1,003		)	76,119
States and political subdivision securities	1,864		—		—			1,864
Corporate debt securities	4,996		34		—			5,030
Other	1,006		42		—			1,048
	$	1,413,255	$	5,825	$	(8,605	)	$	1,410,475

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
As of September 30, 2014
U.S. Treasury securities	$	222,868	$	31	$	(174	)	$	222,725
U.S. Agency securities	—		—		—			—
Mortgage-backed securities:
Government National Mortgage Association	1,113,363		4,639		(14,587		)	1,103,415
Federal National Mortgage Association	—		—		—			—
Small Business Assistance Program	—		—		—			—
States and political subdivision securities	2,188		1		—			2,189
Corporate debt securities	11,732		141		—			11,873
Other	1,006		34		—			1,040
	$	1,351,157	$	4,846	$	(14,761	)	$	1,341,242

The amortized cost and approximate fair value of debt securities available for sale as of June 30, 2015 and September 30, 2014, by contractual maturity, are shown below. Maturities of mortgage-backed securities may differ from contractual maturities because the mortgages underlying the securities may be called or repaid without any penalties.

	June 30, 2015				September 30, 2014
(In Thousands)	Amortized Cost		Fair Value		Amortized Cost		Fair Value
Due in one year or less	$	75,053	$	75,050	$	7,207	$	7,218
Due after one year through five years	305,648		308,312		223,282		223,140
Due after five years through ten years	1,039		1,039		6,299		6,429
	381,740		384,401		236,788		236,787
Mortgage-backed securities	1,030,509		1,025,026		1,113,363		1,103,415
Securities without contractual maturities	1,006		1,048		1,006		1,040
	$	1,413,255	$	1,410,475	$	1,351,157	$	1,341,242

Proceeds from sales of securities available for sale were $0.0 million and $0.0 million for the three months ended June 30, 2015 and 2014, respectively, and $55.1 million and $4.5 million for the nine months ended June 30, 2015 and 2014, respectively. There were no sales of available for sale securities for the three months ended June 30, 2015 and 2014, and no gross gains or gross losses were realized. Gross gains of $0.6 million and $0.0 million and gross losses of $0.5 million and $0.0 million were realized on the sales for the nine months ended June 30, 2015 and 2014, respectively, using the specific identification method.

Securities with a carrying value of approximately $974.2 million and $1,132.3 million at June 30, 2015 and September 30, 2014, respectively, were pledged as collateral on public deposits, securities sold under agreements to repurchase, and for other purposes as required or permitted by law. The counterparties do not have the right to sell or pledge the securities the Company has pledged as collateral.

As detailed in the following tables, certain investments in debt securities, which are approximately 52% and 64% of the Company’s investment portfolio at June 30, 2015 and September 30, 2014, respectively, are reported in the consolidated financial statements at an amount less than their amortized cost. Based on evaluation of available evidence, including recent changes in market interest rates, credit rating information, implicit or explicit government guarantees, and information obtained from regulatory filings, management believes the declines in fair value of these securities are temporary. As the Company does not intend to sell the securities and it is not more likely than not that the Company will be required to sell the securities before the recovery of their amortized cost basis, which may be maturity, the Company does not consider the securities to be other than temporarily impaired at June 30, 2015 or September 30, 2014. The Company did not recognize any other-than-temporary impairment for the three and nine months ended June 30, 2015 and 2014.

The following table presents the Company’s gross unrealized losses and approximate fair value in investments, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position (in thousands):

	Less than 12 months					June 30, 2015 12 months or more					Total
	Fair Value		Unrealized			Fair Value		Unrealized			Fair Value		Unrealized
U.S. Treasury securities	$	18,364	$	(113	)	$	—	$	—		$	18,364	$	(113	)
U. S. Agency securities	49,577		(57		)	—		—			49,577		(57		)
Mortgage-backed securities	161,004		(1,607		)	507,944		(6,828		)	668,948		(8,435		)
	$	228,945	$	(1,777	)	$	507,944	$	(6,828	)	$	736,889	$	(8,605	)

	Less than 12 months					September 30, 2014 12 months or more					Total
	Fair Value		Unrealized			Fair Value		Unrealized			Fair Value		Unrealized
U.S. Treasury securities	$	98,344	$	(174	)	$	—	$	—		$	98,344	$	(174	)
U.S. Agency securities	—		—			—		—			—		—
Mortgage-backed securities	24,625		(125		)	730,171		(14,462		)	754,796		(14,587		)
	$	122,969	$	(299	)	$	730,171	$	(14,462	)	$	853,140	$	(14,761	)

As of June 30, 2015 and September 30, 2014, the Company had 47 and 49 securities, respectively, in an unrealized loss position.

The Company’s investments in nonmarketable equity securities are all stock of the Federal Home Loan Bank ("FHLB"). The carrying value of Federal Home Loan Bank stock was $36.3 million and $35.9 million as of June 30, 2015 and September 30, 2014, respectively, and is reported in other assets on the consolidated balance sheets. No indicators of impairment related to FHLB stock were identified during the three and nine months ended June 30, 2015 and 2014.

The components of other comprehensive income from net unrealized gains (losses) on securities available for sale for the three and nine months ended June 30, 2015 and 2014, respectively are as follows (in thousands):

	Three Months Ended June 30,						Nine Months Ended June 30,
	2015			2014			2015			2014
Beginning balance accumulated other comprehensive income (loss)	$	2,111		$	(7,214	)	$	(6,157	)	$	(7,081	)
Net unrealized holding gain (loss) arising during the period	(6,099		)	7,752			7,186			7,363
Reclassification adjustment for net gain realized in net income	—			—			(51		)	(6		)
Net change in unrealized gain (loss) before income taxes	(6,099		)	7,752			7,135			7,357
Income tax (expense) benefit	2,254			(2,946		)	(2,712		)	(2,684		)
Net change in unrealized gain (loss) on securities after taxes	(3,845		)	4,806			4,423			4,673
Ending balance accumulated other comprehensive income (loss)	$	(1,734	)	$	(2,408	)	$	(1,734	)	$	(2,408	)

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Restrictions on Cash and Due from Banks

9 Months Ended

Jun. 30, 2015

Cash and Cash Equivalents [Abstract]

Restrictions on Cash and Due from Banks

Restrictions on Cash and Due from Banks

The Company is required to maintain reserve balances in cash and on deposit with the Federal Reserve based on a percentage of deposits. The total requirement was approximately $42.9 million and $50.4 million at June 30, 2015 and September 30, 2014, respectively.

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Profit-Sharing Plan

9 Months Ended

Jun. 30, 2015

Employee Service Share-based Compensation, Aggregate Disclosures [Abstract]

Profit-Sharing Plan

Profit-Sharing Plan

The Company participates in a multiple employer 401(k) profit sharing plan (the Plan). All employees are eligible to participate, beginning with the first day of the month coincident with or immediately following the completion of one year of service and having reached the age of 21. In addition to employee contributions, the Company may contribute discretionary amounts for eligible participants. Contribution rates for participating employees must be equal. The Company contributed $1.1 million and $1.3 million to the Plan for the three months ended June 30, 2015 and 2014, respectively and $2.9 million and $2.5 million for the nine months ended June 30, 2015 and 2014, respectively.

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Core Deposits and Other Intangibles

9 Months Ended

Jun. 30, 2015

Goodwill and Intangible Assets Disclosure [Abstract]

Core Deposits and Other Intangibles

Core Deposits and Other Intangibles

A summary of intangible assets subject to amortization is as follows (in thousands):

	Core Deposit Intangible			Brand Intangible			Customer Relationships Intangible			Total
As of June 30, 2015
Gross carrying amount	$	92,679		$	8,464		$	16,089		$	117,232
Accumulated amortization	(91,980		)	(3,995		)	(13,430		)	(109,405		)
Net intangible assets	$	699		$	4,469		$	2,659		$	7,827
As of September 30, 2014
Gross carrying amount	$	92,679		$	8,464		$	16,089		$	117,232
Accumulated amortization	(87,423		)	(3,572		)	(12,008		)	(103,003		)
Net intangible assets	$	5,256		$	4,892		$	4,081		$	14,229

Amortization expense of intangible assets was $1.8 million and $4.1 million for the three months ended June 30, 2015 and 2014, respectively and $6.4 million and $13.4 million for the nine months ended June 30, 2015 and 2014, respectively.

The estimated amortization expense of intangible assets assumes no activities, such as acquisitions, which would result in additional amortizable intangible assets. Estimated amortization expense of intangible assets in subsequent fiscal years is as follows (in thousands):

Remaining in 2015	$	709
2016	2,822
2017	1,097
2018	564
2019	564
2020 and thereafter	2,071
	$	7,827

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Fair Value of Financial Instruments - (Narrative) (Details)	9 Months Ended
	Jun. 30, 2015
Fair Value Disclosures [Abstract]
Derivative, remaining maturity (or less)	180 days

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Accounting for Certain Loans Acquired with Deteriorated Credit Quality

9 Months Ended

Jun. 30, 2015

Receivables [Abstract]

Accounting for Certain Loans Acquired with Deteriorated Credit Quality

Accounting for Certain Loans Acquired with Deteriorated Credit Quality

In June 2010, the Company acquired certain loans that had deteriorated credit quality. Loan accounting specific to these purchased impaired loans addresses differences between contractual cash flows expected to be collected from the initial investment in loans if those differences are attributable, at least in part, to credit quality. Several factors were considered when evaluating whether a loan was considered a purchased impaired loan, including the delinquency status of the loan, updated borrower credit status, geographic information, and updated loan-to-values (“LTV”). U.S. GAAP allows purchasers to aggregate purchased impaired loans acquired in the same fiscal quarter in one or more pools, provided that the loans have common risk characteristics. A pool is then accounted for as a single asset with a single composite interest rate and an aggregate expectation of cash flows.

Loan pools are periodically reassessed to determine expected cash flows. In determining the expected cash flows, the timing of cash flows and prepayment assumptions for smaller, homogenous loans are based on statistical models that take into account factors such as the loan interest rate, credit profile of the borrowers, the years in which the loans were originated, and whether the loans are fixed or variable rate loans. Prepayments may be assumed on large individual loans that consider similar prepayment factors listed above for smaller homogenous loans. The re-assessment of purchased impaired loans resulted in the following changes in the accretable yield during the three and nine months ended June 30, 2015 and 2014 (in thousands):

	Three Months Ended June 30,						Nine Months Ended June 30,
	2015			2014			2015			2014
Balance at beginning of period	$	43,431		$	56,415		$	50,889		$	67,660
Accretion	(3,240		)	(4,642		)	(11,249		)	(14,016		)
Reclassification from nonaccretable difference	7,736			227			8,367			3,175
Disposals	(1,038		)	(185		)	(1,118		)	(5,004		)
Balance at end of period	$	46,889		$	51,815		$	46,889		$	51,815

The reclassifications from nonaccretable difference noted in the table above represent instances where specific pools of loans are expected to perform better over the remaining lives of the loans than expected at the prior re-assessment date.

The following table provides purchased impaired loans at June 30, 2015 and September 30, 2014 (in thousands):

	June 30, 2015						September 30, 2014
	Outstanding Balance 1		Recorded Investment 2		Carrying Value 3		Outstanding Balance 1		Recorded Investment 2		Carrying Value 3
Residential real estate	$	98,677	$	86,569	$	85,059	$	115,863	$	102,987	$	100,203
Commercial real estate	100,075		23,402		22,147		130,825		49,202		48,557
Commercial non real estate	11,092		2,889		2,889		16,697		6,361		6,361
Agriculture	1,567		1,567		1,567		1,747		1,746		1,746
Consumer	1,474		1,374		1,374		2,019		1,843		1,818
Total lending	$	212,885	$	115,801	$	113,036	$	267,151	$	162,139	$	158,685

^{1    Represents the legal balance of loans acquired with deteriorated credit quality.}  

^{2    Represents the book balance of loans acquired with deteriorated credit quality.}  

^{3    Represents the book balance of loans acquired with deteriorated credit quality net of the related allowance for loan losses.} 

Due to improved cash flows of the purchased impaired loans, the reductions to allowance recognized on previous impairments were $0.9 million and $0.0 million for the three months ended June 30, 2015 and 2014, respectively and $1.9 million and $3.6 million for the nine months ended June 30, 2015 and 2014, respectively.

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Accounting for Certain Loans Acquired with Deteriorated Credit Quality - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Receivables [Abstract]
Allowance recognized on previous impairments	$ 0.9	$ 0.0	$ 1.9	$ 3.6

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Loans

9 Months Ended

Jun. 30, 2015

Receivables [Abstract]

Loans

Loans

The composition of net loans as of June 30, 2015 and September 30, 2014, is as follows (in thousands):

	June 30, 2015			September 30, 2014
Residential real estate	$	922,481		$	901,605
Commercial real estate	2,720,993			2,541,194
Commercial non real estate	1,701,024			1,571,640
Agriculture	1,813,330			1,681,209
Consumer	75,311			90,086
Other	38,901			34,243
	7,272,040			6,819,977
Less:
Allowance for loan losses	(55,930		)	(47,518		)
Unamortized discount on acquired loans	(20,356		)	(25,638		)
Unearned net deferred fees and costs and loans in process	(6,445		)	(6,872		)
	$	7,189,309		$	6,739,949

The loan breakouts above include loans covered by FDIC loss sharing agreements totaling $102.2 million and $234.0 million as of June 30, 2015 and September 30, 2014, respectively, residential real estate loans held for sale totaling $9.2 million and $10.4 million at June 30, 2015 and September 30, 2014, respectively, and $1,063.7 million and $985.4 million of loans and written loan commitments accounted for at fair value as of June 30, 2015 and September 30, 2014, respectively.

Unamortized net deferred fees and costs totaled $6.8 million and $6.3 million as of June 30, 2015 and September 30, 2014, respectively.

Loans in process represent loans that have been funded as of the balance sheet dates but not classified into a loan category and loan payments received as of the balance sheet dates that have not been applied to individual loan accounts. Loans in process totaled $(0.4) million and $0.6 million as of June 30, 2015 and September 30, 2014, respectively.

Loans guaranteed by agencies of the U.S. government totaled $108.6 million and $106.5 million at June 30, 2015 and September 30, 2014, respectively.

Principal balances of residential real estate loans sold totaled $79.5 million and $58.4 million for the three months ended June 30, 2015 and 2014, respectively and $213.4 million and $146.3 million for the nine months ended June 30, 2015 and 2014, respectively.

The following table presents the Company’s nonaccrual loans at June 30, 2015 and September 30, 2014 (in thousands), excluding loans covered under the FDIC loss-sharing agreements. Loans greater than 90 days past due and still accruing interest as of June 30, 2015 and September 30, 2014, were not significant.

Nonaccrual loans	June 30, 2015		September 30, 2014
Residential real estate	$	7,846	$	6,671
Commercial real estate	22,000		20,767
Commercial non real estate	8,198		4,908
Agriculture	21,709		11,453
Consumer	90		146
Total	$	59,843	$	43,945

The following table (in thousands) presents the Company’s past due loans at June 30, 2015 and September 30, 2014. This table is presented net of unamortized discount on acquired loans and excludes loans measured at fair value with changes in fair value reported in earnings of $1,063.7 million for June 30, 2015 and $985.4 million for September 30, 2014.

As of June 30, 2015	30-59 Days Past Due		60-89 Days Past Due		Greater Than 90 Days		Total Past Due		Current		Total Financing Receivables
Residential real estate	$	734	$	644	$	3,484	$	4,862	$	806,716	$	811,578
Commercial real estate	5,194		1,313		4,327		10,834		2,402,342		2,413,176
Commercial non real estate	1,867		121		5,213		7,201		1,257,382		1,264,583
Agriculture	1,650		221		7,470		9,341		1,472,970		1,482,311
Consumer	128		196		37		361		74,903		75,264
Other	—		—		—		—		38,901		38,901
	9,573		2,495		20,531		32,599		6,053,214		6,085,813
Loans covered by FDIC loss sharing agreements	1,267		371		1,012		2,650		99,553		102,203
Total	$	10,840	$	2,866	$	21,543	$	35,249	$	6,152,767	$	6,188,016

As of September 30, 2014	30-59 Days Past Due		60-89 Days Past Due		90 Days or Greater Past Due		Total Past Due		Current		Total Financing Receivables
Residential real estate	$	675	$	611	$	2,581	$	3,867	$	760,887	$	764,754
Commercial real estate	11,050		819		3,384		15,253		1,988,585		2,003,838
Commercial non real estate	1,761		6,228		744		8,733		1,303,925		1,312,658
Agriculture	16		368		4,205		4,589		1,364,960		1,369,549
Consumer	244		18		49		311		89,528		89,839
Other	—		—		—		—		34,243		34,243
	13,746		8,044		10,963		32,753		5,542,128		5,574,881
Loans covered by FDIC loss sharing agreements	1,960		1,252		3,728		6,940		227,096		234,036
Total	$	15,706	$	9,296	$	14,691	$	39,693	$	5,769,224	$	5,808,917

The composition of the loan portfolio by internally assigned grade is as follows as of June 30, 2015 and September 30, 2014. This table (in thousands) is presented net of unamortized discount on acquired loans and excludes loans measured at fair value with changes in fair value reported in earnings of $1,063.7 million for June 30, 2015 and $985.4 million for September 30, 2014:

As of June 30, 2015	Residential Real Estate		Commercial Real Estate		Commercial Non Real Estate		Agriculture		Consumer		Other		Total
Credit Risk Profile by Internally Assigned Grade
Grade:
Pass	$	794,153	$	2,260,026	$	1,147,017	$	1,262,624	$	74,951	$	38,901	$	5,577,672
Watchlist	5,142		98,836		51,606		166,583		89		—		322,256
Substandard	11,895		54,109		64,768		51,761		223		—		182,756
Doubtful	384		205		1,192		1,112		1		—		2,894
Loss	4		—		—		231		—		—		235
Ending balance	811,578		2,413,176		1,264,583		1,482,311		75,264		38,901		6,085,813
Loans covered by FDIC loss sharing agreements	102,203		—		—		—		—		—		102,203
Total	$	913,781	$	2,413,176	$	1,264,583	$	1,482,311	$	75,264	$	38,901	$	6,188,016

As of September 30, 2014	Residential Real Estate		Commercial Real Estate		Commercial Non Real Estate		Agriculture		Consumer		Other		Total
Credit Risk Profile by Internally Assigned Grade
Grade:
Pass	$	747,485	$	1,867,866	$	1,218,558	$	1,202,145	$	89,197	$	34,243	$	5,159,494
Watchlist	5,320		84,132		65,628		132,262		381		—		287,723
Substandard	11,290		51,692		27,499		35,107		242		—		125,830
Doubtful	659		148		798		35		19		—		1,659
Loss	—		—		175		—		—		—		175
Ending balance	764,754		2,003,838		1,312,658		1,369,549		89,839		34,243		5,574,881
Loans covered by FDIC loss sharing agreements	127,115		95,467		9,390		2,004		60		—		234,036
Total	$	891,869	$	2,099,305	$	1,322,048	$	1,371,553	$	89,899	$	34,243	$	5,808,917

Impaired Loans

The following table presents the Company’s impaired loans (in thousands). This table excludes loans covered by FDIC loss sharing agreements:

	Recorded Investment		Unpaid Principal Balance		Related Allowance		Average Recorded Investment
As of June 30, 2015
Impaired loans:
With an allowance recorded:
Residential real estate	$	12,481	$	12,678	$	2,582	$	12,294
Commercial real estate	77,015		78,947		3,006		69,585
Commercial non real estate	68,694		78,557		6,733		50,608
Agriculture	53,104		53,541		3,743		44,316
Consumer	224		312		45		252
	$	211,518	$	224,035	$	16,109	$	177,055

	Recorded Investment		Unpaid Principal Balance		Related Allowance		Average Recorded Investment
As of September 30, 2014
Impaired loans:
With an allowance recorded:
Residential real estate	$	12,107	$	12,737	$	2,529	$	13,572
Commercial real estate	62,155		64,597		2,017		84,490
Commercial non real estate	35,522		37,882		3,927		31,827
Agriculture	35,528		37,958		1,155		30,546
Consumer	280		491		51		346
	$	145,592	$	153,665	$	9,679	$	160,781

There are no impaired loans without a valuation allowance, other than those loans for which the Company has claim to collateral with value(s) in excess of the outstanding loan amount, after allowing for the cost of liquidating the collateral as of June 30, 2015 and September 30, 2014. The average recorded investment on impaired loans for the three months ended June 30, 2015 and 2014 totaled $192.6 million and $165.2 million, respectively, and $177.0 million and $170.5 million for the nine months ended June 30, 2015 and 2014, respectively. Interest income recognized on impaired loans for the three months ended June 30, 2015 and 2014 totaled $2.3 million and $1.2 million, respectively and $7.1 million and $4.6 million for the nine months ended June 30, 2015 and 2014, respectively.

Valuation adjustments made to repossessed properties for the three months ended June 30, 2015 and 2014, totaled $1.2 million and $8.2 million, respectively, and $5.6 million and $9.3 million for the nine months ended June 30, 2015 and 2014, respectively. The adjustments are included in other noninterest expense.

Troubled Debt Restructured Loans

Included in certain loan categories in the impaired loans are troubled debt restructurings (“TDRs”) that were classified as impaired. These TDRs do not include purchased impaired loans. When the Company grants concessions to borrowers such as reduced interest rates or extensions of loan periods that would not be considered other than because of borrowers’ financial difficulties, the modification is considered a TDR. Specific reserves included in the allowance for loan losses for TDRs were $3.0 million and $3.2 million at June 30, 2015 and September 30, 2014, respectively. Commitments to lend additional funds to borrowers whose loans were modified in a TDR were not significant as of June 30, 2015 or September 30, 2014.

The following table presents the recorded value of the Company’s TDR balances as of June 30, 2015 and September 30, 2014 (in thousands):

	June 30, 2015				September 30, 2014
	Accruing		Nonaccrual		Accruing		Nonaccrual
Residential real estate	$	668	$	1,536	$	1,112	$	1,730
Commercial real estate	44,170		4,680		25,177		6,884
Commercial non real estate	9,961		1,101		6,753		1,785
Agriculture	80		7,440		3,780		9,994
Consumer	37		7		35		22
Total	$	54,916	$	14,764	$	36,857	$	20,415

The following table presents a summary of all accruing loans restructured in TDRs during the three months ended June 30, 2015 and 2014, respectively:

	Three Months Ended June 30,
	2015					2014
		Recorded Investment					Recorded Investment
($ in thousands)	Number	Pre- Modification		Post- Modification		Number	Pre- Modification		Post- Modification
Residential real estate
Rate modification	—	$	—	$	—	—	$	—	$	—
Term extension	1	35		35		—	—		—
Payment modification	—	—		—		1	35		35
Bankruptcy	—	—		—		—	—		—
Other	—	—		—		—	—		—
Total residential real estate	1	35		35		1	35		35
Commercial real estate
Rate modification	—	—		—		—	—		—
Term extension	1	574		574		—	—		—
Payment modification	—	—		—		1	1,841		1,841
Bankruptcy	—	—		—		—	—		—
Other	—	—		—		—	—		—
Total commercial real estate	1	574		574		1	1,841		1,841
Commercial non real estate
Rate modification	—	—		—		—	—		—
Term extension	—	—		—		1	79		79
Payment modification	—	—		—		1	2,182		2,182
Bankruptcy	—	—		—		—	—		—
Other	—	—		—		1	2		2
Total commercial non real estate	—	—		—		3	2,263		2,263
Agriculture
Rate modification	—	—		—		—	—		—
Term extension	—	—		—		—	—		—
Payment modification	—	—		—		—	—		—
Bankruptcy	—	—		—		—	—		—
Other	—	—		—		—	—		—
Total agriculture	—	—		—		—	—		—
Consumer
Rate modification	—	—		—		—	—		—
Term extension	—	—		—		—	—		—
Payment modification	1	18		18		1	11		11
Bankruptcy	—	—		—		—	—		—
Other	—	—		—		—	—		—
Total consumer	1	18		18		1	11		11
Total accruing	3	$	627	$	627	6	$	4,150	$	4,150
Change in recorded investment due to principal paydown at time of modification	—	$	—	$	—	—	$	—	$	—
Change in recorded investment due to chargeoffs at time of modification	—	$	—	$	—	—	$	—	$	—

The following table presents a summary of all accruing loans restructured in TDRs during the nine months ended June 30, 2015 and 2014:

	Nine Months Ended June 30,
	2015					2014
		Recorded Investment					Recorded Investment
($ in thousands)	Number	Pre- Modification		Post- Modification		Number	Pre- Modification		Post- Modification
Residential real estate
Rate modification	1	$	15	$	15	—	$	—	$	—
Term extension	1	35		35		2	74		74
Payment modification	—	—		—		2	50		50
Bankruptcy	—	—		—		1	130		130
Other	1	21		21		—	—		—
Total residential real estate	3	71		71		5	254		254
Commercial real estate
Rate modification	—	—		—		—	—		—
Term extension	2	664		574		—	—		—
Payment modification	6	22,542		22,542		2	2,911		2,911
Bankruptcy	1	498		498		—	—		—
Other	—	—		—		—	—		—
Total commercial real estate	9	23,704		23,614		2	2,911		2,911
Commercial non real estate
Rate modification	1	32		32		—	—		—
Term extension	3	2,879		2,879		5	1,813		1,813
Payment modification	2	1,874		1,874		5	2,917		2,917
Bankruptcy	—	—		—		—	—		—
Other	—	—		—		2	329		329
Total commercial non real estate	6	4,785		4,785		12	5,059		5,059
Agriculture
Rate modification	—	—		—		—	—		—
Term extension	—	—		—		—	—		—
Payment modification	—	—		—		—	—		—
Bankruptcy	—	—		—		—	—		—
Other	—	—		—		—	—		—
Total agriculture	—	—		—		—	—		—
Consumer
Rate modification	—	—		—		—	—		—
Term extension	—	—		—		—	—		—
Payment modification	1	18		18		3	15		15
Bankruptcy	1	6		6		—	—		—
Other	—	—		—		2	28		28
Total consumer	2	24		24		5	43		43
Total accruing	20	$	28,584	$	28,494	24	$	8,267	$	8,267
Change in recorded investment due to principal paydown at time of modification	—	$	—	$	—	—	$	—	$	—
Change in recorded investment due to chargeoffs at time of modification	1	$	90	$	—	—	$	—	$	—

The following table presents a summary of all non-accruing loans restructured in TDRs during the three months ended June 30, 2015 and 2014:

	Three Months Ended June 30,
	2015					2014
		Recorded Investment					Recorded Investment
($ in thousands)	Number	Pre- Modification		Post- Modification		Number	Pre- Modification		Post- Modification
Residential real estate
Rate modification	—	$	—	$	—	—	$	—	$	—
Term extension	1	—		—		1	8		8
Payment modification	1	19		19		1	11		11
Bankruptcy	—	—		—		—	—		—
Other	1	25		10		—	—		—
Total residential real estate	3	44		29		2	19		19
Commercial real estate
Rate modification	—	—		—		—	—		—
Term extension	—	—		—		—	—		—
Payment modification	—	—		—		—	—		—
Bankruptcy	—	—		—		—	—		—
Other	—	—		—		—	—		—
Total commercial real estate	—	—		—		—	—		—
Commercial Non Real Estate
Rate modification	—	—		—		—	—		—
Term extension	1	77		—		—	—		—
Payment modification	1	4		4		1	36		36
Bankruptcy	—	—		—		—	—		—
Other	—	—		—		—	—		—
Total commercial non real estate	2	81		4		1	36		36
Agriculture
Rate modification	—	—		—		—	—		—
Term extension	—	—		—		—	—		—
Payment modification	—	—		—		—	—		—
Bankruptcy	—	—		—		—	—		—
Other	—	—		—		—	—		—
Total agriculture	—	—		—		—	—		—
Consumer
Rate modification	—	—		—		—	—		—
Term extension	1	1		1		—	—		—
Payment modification	—	—		—		—	—		—
Bankruptcy	—	—		—		—	—		—
Other	—	—		—		—	—		—
Total consumer	1	1		1		—	—		—
Total non-accruing	6	$	126	$	34	3	$	55	$	55
Change in recorded investment due to principal paydown at time of modification	—	$	—	$	—	—	$	—	$	—
Change in recorded investment due to chargeoffs at time of modification	2	$	92	$	—	—	$	—	$	—

The following table presents a summary of all non-accruing loans restructured in TDRs during the nine months ended June 30, 2015 and 2014:

	Nine Months Ended June 30,
	2015					2014
		Recorded Investment					Recorded Investment
($ in thousands)	Number	Pre- Modification		Post- Modification		Number	Pre- Modification		Post- Modification
Residential real estate
Rate modification	2	$	104	$	104	4	$	98	$	98
Term extension	2	77		77		3	26		26
Payment modification	1	19		19		1	11		11
Bankruptcy	1	43		43		1	4		4
Other	1	25		10		1	38		38
Total residential real estate	7	268		253		10	177		177
Commercial real estate
Rate modification	—	—		—		2	500		500
Term extension	—	—		—		2	4,031		4,031
Payment modification	—	—		—		—	—		—
Bankruptcy	—	—		—		—	—		—
Other	—	—		—		1	87		87
Total commercial real estate	—	—		—		5	4,618		4,618
Commercial Non Real Estate
Rate modification	—	—		—		—	—		—
Term extension	5	294		217		8	125		125
Payment modification	1	4		4		1	36		36
Bankruptcy	—	—		—		1	10		10
Other	—	—		—		—	—		—
Total commercial non real estate	6	298		221		10	171		171
Agriculture
Rate modification	—	—		—		—	—		—
Term extension	—	—		—		2	260		260
Payment modification	—	—		—		—	—		—
Bankruptcy	—	—		—		—	—		—
Other	—	—		—		—	—		—
Total agriculture	—	—		—		2	260		260
Consumer
Rate modification	—	—		—		—	—		—
Term extension	2	2		2		1	11		11
Payment modification	—	—		—		—	—		—
Bankruptcy	—	—		—		—	—		—
Other	—	—		—		1	1		1
Total consumer	2	2		2		2	12		12
Total non-accruing	15	$	568	$	476	29	$	5,238	$	5,238
Change in recorded investment due to principal paydown at time of modification	—	$	—	$	—	—	$	—	$	—
Change in recorded investment due to chargeoffs at time of modification	2	$	92	$	—	—	$	—	$	—

The tables below represent defaults on loans that were first modified during the respective past 12 months, that became 90 days or more delinquent or were charged-off during the three and nine months ended June 30, 2015 and 2014, respectively.

	Three Months Ended June 30,
	2015			2014
($ in thousands)	Number of Loans	Recorded Investment		Number of Loans	Recorded Investment
Residential real estate	1	$	10	—	$	—
Commercial real estate	—	—		—	—
Commercial non real estate	2	32		1	15
Agriculture	3	782		—	—
Consumer	—	—		—	—
	6	$	824	1	$	15

	Nine Months Ended June 30,
	2015			2014
($ in thousands)	Number of Loans	Recorded Investment		Number of Loans	Recorded Investment
Residential real estate	4	$	353	2	$	337
Commercial real estate	—	—		2	7,053
Commercial non real estate	4	32		4	537
Agriculture	3	782		7	7,361
Consumer	—	—		—	—
	11	$	1,167	15	$	15,288

The majority of loans that were modified and subsequently became 90 days or more delinquent have remained on nonaccrual status since the time of modification.

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Allowance for Loan Losses

9 Months Ended

Jun. 30, 2015

Receivables [Abstract]

Allowance for Loan Losses

Allowance for Loan Losses

The following tables presents the Company’s allowance for loan losses roll forward for the three and nine month periods ended June 30, 2015 and 2014.

Three Months Ended June 30, 2015	Residential Real Estate			Commercial Real Estate			Commercial Non Real Estate			Agriculture			Consumer			Other			Total
Beginning balance April 1, 2015	$	7,495		$	15,736		$	15,957		$	12,222		$	189		$	827		$	52,426
Charge-offs	(77		)	(280		)	(1,337		)	(411		)	(31		)	(356		)	(2,492		)
Recoveries	84			205			949			10			32			306			1,586
Provision	(325		)	2,130			1,381			1,545			164			96			4,991
(Impairment) improvement of loans acquired with deteriorated credit quality	(625		)	45			—			—			(1		)	—			(581		)
Ending balance June 30, 2015	$	6,552		$	17,836		$	16,950		$	13,366		$	353		$	873		$	55,930

Three Months Ended June 30, 2014	Residential Real Estate			Commercial Real Estate			Commercial Non Real Estate			Agriculture			Consumer			Other			Total
Beginning balance April 1, 2014	$	10,277		$	17,603		$	10,275		$	7,903		$	430		$	665		$	47,153
Charge-offs	(144		)	(539		)	(1,884		)	(566		)	(39		)	(198		)	(3,370		)
Recoveries	94			497			469			14			69			612			1,755
Provision	187			494			727			389			(68		)	(229		)	1,500
(Impairment) improvement of loans acquired with deteriorated credit quality	—			—			—			—			—			—			—
Ending balance June 30, 2014	$	10,414		$	18,055		$	9,587		$	7,740		$	392		$	850		$	47,038

Nine Months Ended June 30, 2015	Residential Real Estate			Commercial Real Estate			Commercial Non Real Estate			Agriculture			Consumer			Other			Total
Beginning balance October 1, 2014	$	8,342		$	16,884		$	10,550		$	10,655		$	264		$	823		$	47,518
Charge-offs	(197		)	(1,932		)	(9,861		)	(438		)	(88		)	(1,187		)	(13,703		)
Recoveries	197			300			3,092			89			79			950			4,707
Provision	(515		)	2,476			13,169			3,060			123			287			18,600
(Impairment) improvement of loans acquired with deteriorated credit quality	(1,275		)	108			—			—			(25		)	—			(1,192		)
Ending balance June 30, 2015	$	6,552		$	17,836		$	16,950		$	13,366		$	353		$	873		$	55,930

Nine Months Ended June 30, 2014	Residential Real Estate			Commercial Real Estate			Commercial Non Real Estate			Agriculture			Consumer			Other			Total
Beginning balance October 1, 2013	$	11,779		$	22,562		$	11,222		$	9,296		$	312		$	693		$	55,864
Charge-offs	(581		)	(3,733		)	(2,883		)	(2,652		)	(191		)	(1,154		)	(11,194		)
Recoveries	190			1,521			1,228			29			136			1,329			4,433
Provision	201			(2,903		)	1,461			1,067			67			(18		)	(125		)
(Impairment) improvement of loans acquired with deteriorated credit quality	(1,175		)	608			(1,441		)	—			68			—			(1,940		)
Ending balance June 30, 2014	$	10,414		$	18,055		$	9,587		$	7,740		$	392		$	850		$	47,038

The following tables provide details regarding the allowance for loan and lease losses and balance by type of allowance. These tables (in thousands) are presented net of unamortized discount on acquired loans and excludes loans measured at fair value with changes in fair value reported in earnings of $1,063.7 million, loans held for sale of $9.2 million, and guaranteed loans of $108.6 million for June 30, 2015 and loans measured at fair value with changes in fair value reported in earnings of $985.4 million, loans held for sale of $10.4 million, and guaranteed loans of $106.5 million for September 30, 2014.

As of June 30, 2015	Residential Real Estate		Commercial Real Estate		Commercial Non Real Estate		Agriculture		Consumer		Other		Total
Allowance for loan losses
Individually evaluated for impairment	$	2,581	$	2,879	$	6,712	$	3,743	$	45	$	—	$	15,960
Collectively evaluated for impairment	2,461		11,952		10,238		9,623		308		873		35,455
Loans acquired with deteriorated credit quality	1,510		1,255		—		—		—		—		2,765
Loans acquired without deteriorated credit quality	—		1,750		—		—		—		—		1,750
Total allowance	$	6,552	$	17,836	$	16,950	$	13,366	$	353	$	873	$	55,930
Financing Receivables
Individually evaluated for impairment	$	9,125	$	47,069	$	67,369	$	43,113	$	165	$	—	$	166,841
Collectively evaluated for impairment	709,265		2,225,924		1,140,921		1,411,741		72,421		38,901		5,599,173
Loans acquired with deteriorated credit quality	86,569		23,402		2,889		1,567		1,374		—		115,801
Loans acquired without deteriorated credit quality	98,071		65,918		5,445		17,683		1,304		—		188,421
Loans Outstanding	$	903,030	$	2,362,313	$	1,216,624	$	1,474,104	$	75,264	$	38,901	$	6,070,236

As of September 30, 2014	Residential Real Estate		Commercial Real Estate		Commercial Non Real Estate		Agriculture		Consumer		Other		Total
Allowance for loan losses
Individually evaluated for impairment	$	2,528	$	1,953	$	3,909	$	1,152	$	51	$	—	$	9,593
Collectively evaluated for impairment	3,030		12,034		6,641		9,503		188		823		32,219
Loans acquired with deteriorated credit quality	2,784		645		—		—		25		—		3,454
Loans acquired without deteriorated credit quality	—		2,252		—		—		—		—		2,252
Total allowance	$	8,342	$	16,884	$	10,550	$	10,655	$	264	$	823	$	47,518
Financing Receivables
Individually evaluated for impairment	$	9,384	$	38,457	$	28,298	$	25,655	$	166	$	—	$	101,960
Collectively evaluated for impairment	649,970		1,874,474		1,224,035		1,319,343		85,065		34,243		5,187,130
Loans acquired with deteriorated credit quality	102,987		49,202		6,361		1,746		1,843		—		162,139
Loans acquired without deteriorated credit quality	117,630		95,323		7,409		17,655		2,825		—		240,842
Loans Outstanding	$	879,971	$	2,057,456	$	1,266,103	$	1,364,399	$	89,899	$	34,243	$	5,692,071

The reserve for unfunded loan commitments was $0.4 million at both June 30, 2015 and September 30, 2014.

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FDIC Indemnification Asset

9 Months Ended

Jun. 30, 2015

Banking and Thrift [Abstract]

FDIC Indemnification Asset

FDIC Indemnification Asset

Under the terms of the purchase and assumption agreement with the FDIC with regard to the TierOne Bank acquisition, the Company is reimbursed for a portion of the losses incurred on covered assets. As covered assets are resolved, whether it be through repayment, short sale of the underlying collateral, the foreclosure on or sale of collateral, or the sale or charge-off of loans or OREO, any differences between the carrying value of the covered assets versus the payments received during the resolution process, that are reimbursable by the FDIC, are recognized as reductions in the FDIC indemnification asset. Any gains or losses realized from the resolution of covered assets reduce or increase, respectively, the amount recoverable from the FDIC. The following table represents a summary of the activity related to the FDIC indemnification asset for the three and nine months ended June 30, 2015 and 2014 (in thousands):

	Three Months Ended June 30,						Nine Months Ended June 30,
	2015			2014			2015			2014
Balance at beginning of period	$	19,895		$	37,775		$	26,678		$	45,690
Amortization	(1,754		)	(3,256		)	(6,347		)	(11,203		)
Changes in expected reimbursements from FDIC for changes in expected credit losses	15			958			(175		)	550
Changes in reimbursable expenses	(1,148		)	(280		)	(1,511		)	2,525
Payments to/(from) the FDIC	(29		)	(2,965		)	(1,666		)	(5,330		)
Balance at end of period	$	16,979		$	32,232		$	16,979		$	32,232

The loss claims filed are subject to review, approval, and annual audits by the FDIC or its assigned agents for compliance with the terms in the loss sharing agreements. The commercial loss share agreement claim period ended on June 4, 2015. The non-commerical loss share agreement ends June 4, 2020.

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Derivative Financial Instruments - Notional Amounts and Estimated Fair Value (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Sep. 30, 2014
Derivative [Line Items]
Positive Fair Value	$ 2,867	$ 6,213
Negative Fair Value	(27,292)	(19,286)
Assets | Not Designated as Hedging Instruments | Mortgage loan commitments
Derivative [Line Items]
Notional Amount	33,626	22,563
Positive Fair Value	1	19
Negative Fair Value	0	0
Liabilities | Not Designated as Hedging Instruments | Interest rate swaps
Derivative [Line Items]
Notional Amount	1,065,703	986,440
Positive Fair Value	2,867	6,213
Negative Fair Value	(27,292)	(19,286)
Liabilities | Not Designated as Hedging Instruments | Mortgage loan forward sale contracts
Derivative [Line Items]
Notional Amount	38,882	28,459
Positive Fair Value	0	0
Negative Fair Value	$ (1)	$ (19)

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Fair Value of Financial Instruments - Schedule of Fair Value Measurements of Assets and Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Sep. 30, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	$ 1,410,475	$ 1,341,242
Derivatives-liabilities	24,426	13,092
Fair value loans and written loan commitments	1,063,665	985,411
Fair value, measurements, recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	1,410,475	1,341,242
Derivatives-assets	1	19
Derivatives-liabilities	24,426	13,092
Fair value loans and written loan commitments	1,063,665	985,411
Fair value, measurements, recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	377,507	222,725
Derivatives-assets	0	0
Derivatives-liabilities	0	0
Fair value loans and written loan commitments	0	0
Fair value, measurements, recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	1,031,134	1,116,488
Derivatives-assets	1	19
Derivatives-liabilities	24,426	13,092
Fair value loans and written loan commitments	1,063,665	985,411
Fair value, measurements, recurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	1,834	2,029
Derivatives-assets	0	0
Derivatives-liabilities	0	0
Fair value loans and written loan commitments	0	0
U.S. Treasury securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	303,132	222,725
U.S. Treasury securities | Fair value, measurements, recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	303,132	222,725
U.S. Treasury securities | Fair value, measurements, recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	303,132	222,725
U.S. Treasury securities | Fair value, measurements, recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	0	0
U.S. Treasury securities | Fair value, measurements, recurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	0	0
U.S. Agency securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	74,375	0
U.S. Agency securities | Fair value, measurements, recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	74,375	0
U.S. Agency securities | Fair value, measurements, recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	74,375	0
U.S. Agency securities | Fair value, measurements, recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	0	0
U.S. Agency securities | Fair value, measurements, recurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	0	0
Mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	1,025,026	1,103,415
Mortgage-backed securities | Fair value, measurements, recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	1,025,026	1,103,415
Mortgage-backed securities | Fair value, measurements, recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	0	0
Mortgage-backed securities | Fair value, measurements, recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	1,025,026	1,103,415
Mortgage-backed securities | Fair value, measurements, recurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	0	0
States and political subdivision securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	1,864	2,189
States and political subdivision securities | Fair value, measurements, recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	1,864	2,189
States and political subdivision securities | Fair value, measurements, recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	0	0
States and political subdivision securities | Fair value, measurements, recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	30	160
States and political subdivision securities | Fair value, measurements, recurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	1,834	2,029
Corporate debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	5,030	11,873
Corporate debt securities | Fair value, measurements, recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	5,030	11,873
Corporate debt securities | Fair value, measurements, recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	0	0
Corporate debt securities | Fair value, measurements, recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	5,030	11,873
Corporate debt securities | Fair value, measurements, recurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	0	0
Other | Fair value, measurements, recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	1,048	1,040
Other | Fair value, measurements, recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	0	0
Other | Fair value, measurements, recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	1,048	1,040
Other | Fair value, measurements, recurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	$ 0	$ 0

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Derivative Financial Instruments - Offsetting Liabilities and Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Sep. 30, 2014
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative financial assets, gross amount	$ 2,867	$ 6,213
Derivative financial liabilities, gross amount	(27,292)	(19,286)
Derivative financial assets (liabilities), gross amount	(24,425)	(13,073)
Derivative financial assets, amount offset	(2,867)	(6,213)
Derivative financial liabilities, amount offset	2,867	6,213
Derivative financial assets (liabilities), Net, amount offset	0	0
Derivative financial assets, net amount presented in Consolidated Balance Sheets	0	0
Derivative financial liabilities, net amount presented in Consolidated Balance Sheets	(24,425)	(13,073)
Derivative financial assets (liabilities), net amount presented in Consolidated Balance Sheets	(24,425)	(13,073)
Derivative financial assets, Held/pledged financial instruments	0	0
Derivative financial liabilities, Held/pledged financial instruments	24,425	13,073
Derivative liabilities (assets), Net, Held/pledged financial instruments	24,425	13,073
Derivative financial asset, net amount	0	0
Derivative financial liabilities, net amount	0	0
Derivative financial assets (liabilities), net, amount offset against collateral	$ 0	$ 0

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FDIC Indemnification Asset - Schedule of Other Current Assets (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
FDIC Indemnification Asset [Roll Forward]
Balance at beginning of year	$ 19,895	$ 37,775	$ 26,678	$ 45,690
Amortization	(1,754)	(3,256)	(6,347)	(11,203)
Changes in expected reimbursements from FDIC for changes in expected credit losses	15	958	(175)	550
Changes in reimbursable expenses	(1,148)	(280)	(1,511)	2,525
Payments to/(from) the FDIC	(29)	(2,965)	(1,666)	(5,330)
Balance at end of year	$ 16,979	$ 32,232	$ 16,979	$ 32,232

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The Fair Value Option (Tables)

9 Months Ended

Jun. 30, 2015

Fair Value Disclosures [Abstract]

Summary of Fair Value Option

Changes in fair value for items for which the fair value option has been elected and the line items in which these changes are reported are as follows for the three and nine months ended June 30, 2015 and 2014 (in thousands):

	For the Three Months Ended										For the Nine Months Ended
	June 30, 2015						June 30, 2014				June 30, 2015				June 30, 2014
	Noninterest Income /(Loss)			Total Changes in Fair Value			Noninterest Income		Total Changes in Fair Value		Noninterest Income		Total Changes in Fair Value		Noninterest Income		Total Changes in Fair Value
Long-term loans and written loan commitments	$	(24,394	)	$	(24,394	)	$	13,886	$	13,886	$	7,914	$	7,914	$	13,506	$	13,506

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Loans - Schedule of Financing Receivable (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Mar. 31, 2015	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Sep. 30, 2013
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total financing receivables, gross	$ 7,272,040		$ 6,819,977
Allowance for loan losses	(55,930)	$ (52,426)	(47,518)	$ (47,038)	$ (47,153)	$ (55,864)
Unamortized discount on acquired loans	(20,356)		(25,638)
Unearned net deferred fees and costs and loans in process	(6,445)		(6,872)
Total financing receivables, net	7,189,309		6,739,949
Residential real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total financing receivables, gross	922,481		901,605
Allowance for loan losses	(6,552)	(7,495)	(8,342)	(10,414)	(10,277)	(11,779)
Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total financing receivables, gross	2,720,993		2,541,194
Allowance for loan losses	(17,836)	(15,736)	(16,884)	(18,055)	(17,603)	(22,562)
Commercial non real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total financing receivables, gross	1,701,024		1,571,640
Allowance for loan losses	(16,950)	(15,957)	(10,550)	(9,587)	(10,275)	(11,222)
Agriculture
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total financing receivables, gross	1,813,330		1,681,209
Allowance for loan losses	(13,366)	(12,222)	(10,655)	(7,740)	(7,903)	(9,296)
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total financing receivables, gross	75,311		90,086
Allowance for loan losses	(353)	(189)	(264)	(392)	(430)	(312)
Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total financing receivables, gross	38,901		34,243
Allowance for loan losses	$ (873)	$ (827)	$ (823)	$ (850)	$ (665)	$ (693)

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FHLB Advances, Related Party Notes Payable and Other Borrowings

9 Months Ended

Jun. 30, 2015

Federal Home Loan Banks [Abstract]

FHLB Advances, Related Party Notes Payable and Other Borrowings

FHLB Advances, Related Party Notes Payable and Other Borrowings

FHLB advances, related party notes payable, and other borrowings consist of the following at June 30, 2015 and September 30, 2014 (in thousands):

	June 30, 2015		September 30, 2014
Subordinated capital note to NAB New York (a branch of NAB), due June 2018, interest paid quarterly based on LIBOR plus 205 basis points, unsecured	$	35,795	$	35,795
$10,000 revolving line of credit to NAB due on demand, interest paid monthly based on LIBOR plus 125 basis points, unsecured	5,500		5,500
Total related party notes payable	41,295		41,295
Notes payable to Federal Home Loan Bank (FHLB), interest rates from 0.21% to 3.66% and maturity dates from February 2016 to July 2023, collateralized by real estate loans and FHLB stock, with various call dates at the option of the FHLB	590,000		575,000
Other	520		94
Total FHLB advances and other borrowings	590,520		575,094
Total borrowings	$	631,815	$	616,389

As of June 30, 2015, based on its Federal Home Loan Bank stock holdings, the combined aggregate additional borrowing capacity of the Company with the Federal Home Loan Bank was $676.8 million.

Principal balances of loans pledged to the Federal Home Loan Bank to collateralize notes payable totaled $2,232.8 million and$2,145.5 million at June 30, 2015 and September 30, 2014, respectively.

As of June 30, 2015, FHLB advances, related party notes payable and other borrowings are due or callable (whichever is earlier) in subsequent fiscal years as follows (in thousands):

Remaining in 2015	$	6,020
2016	90,000
2017	25,000
2018	60,795
2019	50,000
2020 and thereafter	400,000
	$	631,815

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Earnings per Share

9 Months Ended

Jun. 30, 2015

Earnings Per Share [Abstract]

Earnings per Share

Earnings per Share

Basic earnings per common share is calculated by dividing net income available to common shareholders by the weighted average number of common shares outstanding during the period, excluding outstanding non-vested restricted stock awards. Diluted earnings per common share is calculated by dividing net income available to common shareholders by the weighted average number of common shares outstanding determined for the basic earnings per share calculation plus the dilutive effect of stock compensation using the treasury stock method.

The following information was used in the computation of basic earnings per share (EPS) for the three and nine months ended June 30, 2015 and 2014 (in thousands except share data).

	Three Months Ended June 30,				Nine Months Ended June 30,
	2015		2014		2015		2014
Net income	$	28,832	$	22,502	$	75,253	$	77,077
Weighted average common shares outstanding	57,898,335		57,886,114		57,897,484		57,886,114
Dilutive effect of stock based compensation	60,867		—		31,704		—
Weighted average common shares outstanding for diluted earnings per share calculation	57,959,202		57,886,114		57,929,188		57,886,114
Basic earnings per share	$	0.50	$	0.39	$	1.30	$	1.33
Diluted earnings per share	$	0.50	$	0.39	$	1.30	$	1.33

The Company had 60,543 and 0 shares of unvested performance stock as of June 30, 2015 and 2014, respectively, that were not included in the computation of diluted earnings per common share because performance conditions for vesting had not been met. The Company had 1,244 and 0 shares of anti-dilutive stock awards outstanding as of June 30, 2015 and 2014, respectively.

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Securities Available for Sale - Unrealized Gain (Loss) On Investments (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Accumulated Other Comprehensive Income (Loss), before Tax [Roll Forward]
Beginning balance accumulated other comprehensive income (loss)	$ 2,111	$ (7,214)	$ (6,157)	$ (7,081)
Net unrealized holding gain (loss) arising during the period	(6,099)	7,752	7,186	7,363
Reclassification adjustment for net gain realized in net income	0	0	(51)	(6)
Net change in unrealized gain (loss) before income taxes	(6,099)	7,752	7,135	7,357
Income tax (expense) benefit	2,254	(2,946)	(2,712)	(2,684)
Net change in unrealized gain (loss) on securities after taxes	(3,845)	4,806	4,423	4,673
Ending balance accumulated other comprehensive income (loss)	$ (1,734)	$ (2,408)	$ (1,734)	$ (2,408)

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Earnings per Share (Tables)

9 Months Ended

Jun. 30, 2015

Earnings Per Share [Abstract]

Schedule of Basic and Diluted Earnings per Share

The following information was used in the computation of basic earnings per share (EPS) for the three and nine months ended June 30, 2015 and 2014 (in thousands except share data).

	Three Months Ended June 30,				Nine Months Ended June 30,
	2015		2014		2015		2014
Net income	$	28,832	$	22,502	$	75,253	$	77,077
Weighted average common shares outstanding	57,898,335		57,886,114		57,897,484		57,886,114
Dilutive effect of stock based compensation	60,867		—		31,704		—
Weighted average common shares outstanding for diluted earnings per share calculation	57,959,202		57,886,114		57,929,188		57,886,114
Basic earnings per share	$	0.50	$	0.39	$	1.30	$	1.33
Diluted earnings per share	$	0.50	$	0.39	$	1.30	$	1.33

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Consolidated Statements of Comprehensive Income (Unaudited) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Income Statement [Abstract]
Income tax (expense) benefit	$ 2,254	$ (2,946)	$ (2,712)	$ (2,684)

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Fair Value of Financial Instruments - Level 3 Schedule (Details) - Fair value, measurements, nonrecurring - USD ($) $ in Thousands	Jun. 30, 2015	Sep. 30, 2014
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Other real estate owned	$ 13,051	$ 36,879
Impaired loans	166,841	111,265
Level 3
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Other real estate owned	13,051	36,879
Impaired loans	$ 166,841	$ 111,265

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New Accounting Pronouncements

9 Months Ended

Jun. 30, 2015

Accounting Changes and Error Corrections [Abstract]

New Accounting Pronouncements

New Accounting Pronouncements

There have been no new applicable accounting pronouncements issued during the nine months ended June 30, 2015.

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Allowance for Loan Losses - Summary of Allowance for Loan Losses (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for loan losses, beginning balance	$ 52,426	$ 47,153	$ 47,518	$ 55,864
Charge-offs	(2,492)	(3,370)	(13,703)	(11,194)
Recoveries	1,586	1,755	4,707	4,433
Provision	4,991	1,500	18,600	(125)
Allowance for loan losses, ending balance	55,930	47,038	55,930	47,038
Residential real estate
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for loan losses, beginning balance	7,495	10,277	8,342	11,779
Charge-offs	(77)	(144)	(197)	(581)
Recoveries	84	94	197	190
Provision	(325)	187	(515)	201
Allowance for loan losses, ending balance	6,552	10,414	6,552	10,414
Commercial real estate
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for loan losses, beginning balance	15,736	17,603	16,884	22,562
Charge-offs	(280)	(539)	(1,932)	(3,733)
Recoveries	205	497	300	1,521
Provision	2,130	494	2,476	(2,903)
Allowance for loan losses, ending balance	17,836	18,055	17,836	18,055
Commercial non real estate
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for loan losses, beginning balance	15,957	10,275	10,550	11,222
Charge-offs	(1,337)	(1,884)	(9,861)	(2,883)
Recoveries	949	469	3,092	1,228
Provision	1,381	727	13,169	1,461
Allowance for loan losses, ending balance	16,950	9,587	16,950	9,587
Agriculture
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for loan losses, beginning balance	12,222	7,903	10,655	9,296
Charge-offs	(411)	(566)	(438)	(2,652)
Recoveries	10	14	89	29
Provision	1,545	389	3,060	1,067
Allowance for loan losses, ending balance	13,366	7,740	13,366	7,740
Consumer
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for loan losses, beginning balance	189	430	264	312
Charge-offs	(31)	(39)	(88)	(191)
Recoveries	32	69	79	136
Provision	164	(68)	123	67
Allowance for loan losses, ending balance	353	392	353	392
Other
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for loan losses, beginning balance	827	665	823	693
Charge-offs	(356)	(198)	(1,187)	(1,154)
Recoveries	306	612	950	1,329
Provision	96	(229)	287	(18)
Allowance for loan losses, ending balance	873	850	873	850
Receivables acquired with deteriorated credit quality
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for loan losses, beginning balance			3,454
(Impairment) improvement of loans acquired with deteriorated credit quality	(581)	0	(1,192)	(1,940)
Allowance for loan losses, ending balance	2,765		2,765
Receivables acquired with deteriorated credit quality | Residential real estate
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for loan losses, beginning balance			2,784
(Impairment) improvement of loans acquired with deteriorated credit quality	(625)	0	(1,275)	(1,175)
Allowance for loan losses, ending balance	1,510		1,510
Receivables acquired with deteriorated credit quality | Commercial real estate
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for loan losses, beginning balance			645
(Impairment) improvement of loans acquired with deteriorated credit quality	45	0	108	608
Allowance for loan losses, ending balance	1,255		1,255
Receivables acquired with deteriorated credit quality | Commercial non real estate
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for loan losses, beginning balance			0
(Impairment) improvement of loans acquired with deteriorated credit quality	0	0	0	(1,441)
Allowance for loan losses, ending balance	0		0
Receivables acquired with deteriorated credit quality | Agriculture
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for loan losses, beginning balance			0
(Impairment) improvement of loans acquired with deteriorated credit quality	0	0	0	0
Allowance for loan losses, ending balance	0		0
Receivables acquired with deteriorated credit quality | Consumer
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for loan losses, beginning balance			25
(Impairment) improvement of loans acquired with deteriorated credit quality	(1)	0	(25)	68
Allowance for loan losses, ending balance	0		0
Receivables acquired with deteriorated credit quality | Other
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for loan losses, beginning balance			0
(Impairment) improvement of loans acquired with deteriorated credit quality	0	$ 0	0	$ 0
Allowance for loan losses, ending balance	$ 0		$ 0

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Stock-Based Compensation - (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based payment award, award vesting period			3 years
Share-based compensation expense	$ 0.3	$ 0.0	$ 1.0	$ 0.0
Tax benefit from compensation expense	0.1	$ 0.0	$ 0.4	$ 0.0
Target performance level			100.00%
Share-based compensation, compensation cost not yet recognized	$ 2.3		$ 2.3
Share-based compensation, compensation cost not yet recognized, recognition period			2 years 3 months
Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Pre-established target levels			0.00%
Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Target performance level			150.00%
Pre-established target levels			150.00%
Performance shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares to be issued (approximately)			320,300

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Core Deposits and Other Intangibles (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization expense of intangible assets	$ 1.8	$ 4.1	$ 6.4	$ 13.4

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Basis of Presentation (Tables)

9 Months Ended

Jun. 30, 2015

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Schedule of Error Corrections and Prior Period Adjustments

The following table reflects the impact of the matter described above on previously filed financial statements:

	Previously Reported			Currently Reported
	Interest Income			Noninterest Income
Nine months ended June 30, 2014
Realized (loss) on derivatives	$	(13,277	)	$	(13,277	)
Nine months ended June 30, 2013
Realized (loss) on derivatives	$	(10,207	)	$	(10,207	)
Twelve months ended September 30, 2014
Realized (loss) on derivatives	$	(18,255	)	$	(18,255	)
Twelve months ended September 30, 2013
Realized (loss) on derivatives	$	(14,217	)	$	(14,217	)
Twelve months ended September 30, 2012
Realized (loss) on derivatives	$	(9,931	)	$	(9,931	)

The following table reflects the impact of the matter described above on previously filed financial statements:

	Previously Reported						Currently Reported
	Interest Income			Noninterest Expense			Noninterest Income
Nine months ended June 30, 2014
Unrealized loss on derivatives	$	—		$	12,119		$	—		$	12,119
Loan fair value change related to interest rates	(12,119		)	—			(12,119		)	—
Loan fair value change related to credit quality	(1,387		)	—			(1,387		)	—
	$	(13,506	)	$	12,119		$	(13,506	)	$	12,119
Nine months ended June 30, 2013
Unrealized (gain) on derivatives	$	—		$	(41,635	)	$	—		$	(41,635	)
Loan fair value change related to interest rates	41,635			—			41,635			—
Loan fair value change related to credit quality	141			—			141			—
	$	41,776		$	(41,635	)	$	41,776		$	(41,635	)
Twelve months ended September 30, 2014
Unrealized loss on derivatives	$	—		$	11,922		$	—		$	11,922
Loan fair value change related to interest rates	(11,922		)	—			(11,922		)	—
Loan fair value change related to credit quality	18			—			18			—
	$	(11,904	)	$	11,922		$	(11,904	)	$	11,922
Twelve months ended September 30, 2013
Unrealized (gain) on derivatives	$	—		$	(40,305	)	$	—		$	(40,305	)
Loan fair value change related to interest rates	40,305			—			40,305			—
Loan fair value change related to credit quality	855			—			855			—
	$	41,160		$	(40,305	)	$	41,160		$	(40,305	)
Twelve months ended September 30, 2012
Unrealized loss on derivatives	$	—		$	19,369		$	—		$	19,369
Loan fair value change related to interest rates	(19,369		)	—			(19,369		)	—
Loan fair value change related to credit quality	4,276			—			4,276			—
	$	(15,093	)	$	19,369		$	(15,093	)	$	19,369

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FHLB Advances, Related Party Notes Payable and Other Borrowings - (Narrative) (Details) - USD ($) $ in Millions	Jun. 30, 2015	Sep. 30, 2014
Federal Home Loan Banks [Abstract]
Current borrowing capacity	$ 676.8
Loans pledged to the Federal Home Loan Bank	$ 2,232.8	$ 2,145.5

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Label	Element	Value
Gain (Loss) on Sales of Loans, Net	us-gaap_GainLossOnSalesOfLoansNet	$ 1,322
Gain (Loss) on Sales of Loans, Net	us-gaap_GainLossOnSalesOfLoansNet	1,903
Net (gain) loss from sale of repossessed property and other assets	gwb_Netgainlossfromsaleofrepossessedpropertyandotherassets	(1,452)
Net (gain) loss from sale of repossessed property and other assets	gwb_Netgainlossfromsaleofrepossessedpropertyandotherassets	$ (1,564)

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Income Taxes (Tables)

9 Months Ended

Jun. 30, 2015

Income Tax Disclosure [Abstract]

Schedule of Income Tax Expense (Benefit) Components

The provision for income taxes charged to operations consists of the following for the three and nine months ended June 30, 2015 and 2014 (in thousands):

	Three Months Ended June 30,					Nine Months Ended June 30,
	2015		2014			2015		2014
Currently paid or payable
Federal	$	5,600	$	16,800		$	29,611	$	43,760
State	2,098		2,588			5,575		6,545
	7,698		19,388			35,186		50,305
Deferred tax (benefit) expense	7,173		(7,254		)	3,107		(8,743		)
Income tax expense	$	14,871	$	12,134		$	38,293	$	41,562

Schedule of Effective Income Tax Rate Reconciliation

The income tax provision differs from the amount of income tax determined by applying the U.S. federal income tax rate to pretax income due to the following for the three and nine months ended June 30, 2015 and 2014 (in thousands):

	Three Months Ended June 30,						Nine Months Ended June 30,
	2015			2014			2015			2014
Computed “expected” tax expense (35%)	$	15,296		$	12,122		$	39,741		$	41,523
Increase (decrease) in income taxes resulting from:
Tax exempt interest income	(1,573		)	(1,263		)	(4,789		)	(3,539		)
State income taxes, net of federal benefit	1,363			1,682			3,623			4,254
Other	(215		)	(407		)	(282		)	(676		)
Actual tax expense	$	14,871		$	12,134		$	38,293		$	41,562

Schedule of Deferred Tax Assets and Liabilities

Net deferred tax assets (liabilities) consist of the following components at June 30, 2015 and September 30, 2014 (in thousands):

	June 30, 2015			September 30, 2014
Deferred tax assets:
Allowance for loan losses	$	22,796		$	19,683
Compensation	705			329
Net operating loss carryforward	81			119
Securities available for sale	1,046			3,758
Other real estate owned	8,880			13,721
Core deposit intangible and other fair value adjustments	11,351			10,573
Excess tax basis of loans acquired over carrying value	4,630			9,595
Other	6,023			6,272
Total deferred tax assets	55,512			64,050
Deferred tax liabilities:
Goodwill and other intangibles	(11,995		)	(9,099		)
Premises and equipment	(3,131		)	(4,390		)
Excess carrying value of FDIC indemnification asset and clawback liability	(326		)	(4,280		)
Other	(1,176		)	(1,578		)
Total deferred tax liabilities	(16,628		)	(19,347		)
Net deferred tax assets	$	38,884		$	44,703

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Securities Sold Under Agreements to Repurchase

9 Months Ended

Jun. 30, 2015

Federal Funds Purchased and Securities Sold under Agreements to Repurchase [Abstract]

Securities Sold Under Agreements to Repurchase

Securities Sold Under Agreements to Repurchase

Securities sold under agreements to repurchase generally mature within one to four days from the transaction date. Securities underlying the agreements had an amortized cost of approximately $170.5 million and $190.6 million and fair value of approximately $170.5 million and $188.6 million at June 30, 2015 and September 30, 2014, respectively. The Company over-collateralizes the repurchase agreements at 102% of total funds borrowed to protect the purchaser from changes in market value.  Additionally, the Company utilizes held-in-custody procedures to ensure the securities sold under repurchase agreements are unencumbered. The following tables present the gross obligation by the class of collateral pledged and the remaining contractual maturity of the agreements at June 30, 2015 and September 30, 2014 (in thousands).

	June 30, 2015
	Remaining Contractual Maturity of the Agreements
	Overnight and Continuous		Up to 30 Days		30-90 Days		Greater than 90 Days		Total
Repurchase agreements
US Treasury and agency securities	$	52,402	$	—	$	—	$	—	$	52,402
Mortgage-backed securities	106,209		—		—		2,948		109,157
Total repurchase agreements	$	158,611	$	—	$	—	$	2,948	$	161,559

	September 30, 2014
	Remaining Contractual Maturity of the Agreements
	Overnight and Continuous		Up to 30 Days		30-90 Days		Greater than 90 Days		Total
Repurchase agreements
US Treasury and agency securities	$	8,469	$	—	$	—	$	—	$	8,469
Mortgage-backed securities	149,511		—		—		3,707		153,218
Total repurchase agreements	$	157,980	$	—	$	—	$	3,707	$	161,687