10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

____________________________________________________ 

FORM 10-Q

____________________________________________________  

(Mark One)

x QUARTERLY REPORT PURSUANT TO SECTION 13 or 15(d) OF THE SECURITIES EXCHANGE ACT of 1934

For the Quarterly Period Ended September 30, 2017

OR

o 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 001-34626

PIEDMONT OFFICE REALTY TRUST, INC.

(Exact name of registrant as specified in its charter)

 ____________________________________________________ 

Maryland	58-2328421
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification Number)

11695 Johns Creek Parkway

Ste. 350

Johns Creek, Georgia 30097

(Address of principal executive offices)

(Zip Code)

(770) 418-8800

(Registrant’s telephone number, including area code)

N/A

(Former name, former address, and former fiscal year, if changed since last report)

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes  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 (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).    Yes  x No  o

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

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

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

Number of shares outstanding of the Registrant’s

common stock, as of October 31, 2017:

144,371,942 shares

FORM 10-Q

PIEDMONT OFFICE REALTY TRUST, INC.

TABLE OF CONTENTS

			Page No.
PART I.	Financial Statements
	Item 1.	Consolidated Financial Statements	5
		Consolidated Balance Sheets—September 30, 2017 (unaudited) and December 31, 2016	6
		Consolidated Statements of Income for the Three and Nine Months Ended September 30, 2017 (unaudited) and 2016 (unaudited)	7
		Consolidated Statements of Comprehensive Income for the Three and Nine Months Ended September 30, 2017 (unaudited) and 2016 (unaudited)	8
		Consolidated Statements of Stockholders' Equity for the Year Ended December 31, 2016 and for the Nine Months Ended September 30, 2017 (unaudited)	9
		Consolidated Statements of Cash Flows for the Nine Months Ended September 30, 2017 (unaudited) and 2016 (unaudited)	10
		Condensed Notes to Consolidated Financial Statements (unaudited)	11
	Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	32
	Item 3.	Quantitative and Qualitative Disclosures About Market Risk	49
	Item 4.	Controls and Procedures	49
PART II.	Other Information
	Item 1.	Legal Proceedings	51
	Item 1A.	Risk Factors	51
	Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds	51
	Item 3.	Defaults Upon Senior Securities	51
	Item 4.	Mine Safety Disclosures	51
	Item 5.	Other Information	52
	Item 6.	Exhibits	52

2

CAUTIONARY NOTE REGARDING FORWARD-LOOKING STATEMENTS

Certain statements contained in this Form 10-Q may constitute forward-looking statements within the meaning of the federal securities laws. In addition, Piedmont Office Realty Trust, Inc. ("Piedmont," "we," "our," or "us"), or its executive officers on Piedmont’s behalf, may from time to time make forward-looking statements in reports and other documents Piedmont files with the Securities and Exchange Commission or in connection with other written or oral statements made to the press, potential investors, or others. Statements regarding future events and developments and Piedmont’s future performance, as well as management’s expectations, beliefs, plans, estimates, or projections relating to the future, are forward-looking statements. Forward-looking statements include statements preceded by, followed by, or that include the words “may,” “will,” “expect,” “intend,” “anticipate,” “estimate,” “believe,” “continue,” or other similar words. Examples of such statements in this report include descriptions of our real estate, financing, and operating objectives; discussions regarding future dividends and share repurchases; and discussions regarding the potential impact of economic conditions on our real estate and lease portfolio.

These statements are based on beliefs and assumptions of Piedmont’s management, which in turn are based on information available at the time the statements are made. Important assumptions relating to the forward-looking statements include, among others, assumptions regarding the demand for office space in the markets in which Piedmont operates, competitive conditions, and general economic conditions. These assumptions could prove inaccurate. The forward-looking statements also involve risks and uncertainties, which could cause actual results to differ materially from those contained in any forward-looking statement. Many of these factors are beyond Piedmont’s ability to control or predict. Such factors include, but are not limited to, the following:

• Economic, regulatory, and/or socio-economic changes (including accounting standards) that impact the real estate market generally, or that could affect patterns of use of commercial office space;

• The impact of competition on our efforts to renew existing leases or re-let space on terms similar to existing leases;

• Changes in the economies and other conditions affecting the office sector in general and the specific markets in which we operate, particularly in Washington, D.C., the New York metropolitan area, and Chicago where we have high concentrations of our Annualized Lease Revenue (see definition below);

• Lease terminations or lease defaults, particularly by one of our large lead tenants;

• The effect on us of adverse market and economic conditions, including any resulting impairment charges on both our long-lived assets or goodwill;

• The success of our real estate strategies and investment objectives, including our ability to identify and consummate suitable acquisitions and divestitures;

• The illiquidity of real estate investments, including the resulting impediment on our ability to quickly respond to adverse changes in the performance of our properties;

• The risks and uncertainties associated with our acquisition of properties, many of which risks and uncertainties may not be known at the time of acquisition;

• Development and construction delays and resultant increased costs and risks;

• Our real estate development strategies may not be successful;

• Future acts of terrorism in any of the major metropolitan areas in which we own properties, or future cybersecurity attacks against us or any of our tenants;

• Costs of complying with governmental laws and regulations;

• Additional risks and costs associated with directly managing properties occupied by government tenants;

• The effect of future offerings of debt or equity securities or changes in market interest rates on the value of our common stock;

• Uncertainties associated with environmental and other regulatory matters;

• Potential changes in political environment and reduction in federal and/or state funding of our governmental tenants;

• Any change in the financial condition of any of our large lead tenants;

• The effect of any litigation to which we are, or may become, subject;

• Changes in tax laws impacting REITs and real estate in general, as well as our ability to continue to qualify as a REIT under the Internal Revenue Code of 1986 (the “Code”);

• The future effectiveness of our internal controls and procedures; and

• Other factors, including the risk factors discussed under Item 1A. of our Amended Annual Report on Form 10-K/A for the year ended December 31, 2016.

Management believes these forward-looking statements are reasonable; however, undue reliance should not be placed on any forward-looking statements, which are based on current expectations. Further, forward-looking statements speak only as of the date they are made, and management undertakes no obligation to update publicly any of them in light of new information or future events.

3

Information Regarding Disclosures Presented

Annualized Lease Revenue ("ALR"), a non-GAAP measure, is calculated by multiplying (i) rental payments (defined as base rent plus operating expense reimbursements, if payable by the tenant on a monthly basis under the terms of a lease that has been executed, but excluding (a) rental abatements and (b) rental payments related to executed but not commenced leases for space that was covered by an existing lease), by (ii) 12. In instances in which contractual rents or operating expense reimbursements are collected on an annual, semi-annual, or quarterly basis, such amounts are multiplied by a factor of 1, 2, or 4, respectively, to calculate the annualized figure. For leases that have been executed but not commenced relating to un-leased space, ALR is calculated by multiplying (i) the monthly base rental payment (excluding abatements) plus any operating expense reimbursements for the initial month of the lease term, by (ii) 12. Unless stated otherwise, this measure excludes revenues associated with our unconsolidated joint venture property (sold on July 27, 2017) and development/re-development properties, if any.

4

PART I. FINANCIAL STATEMENTS

ITEM 1. CONSOLIDATED FINANCIAL STATEMENTS

The information presented in the accompanying consolidated balance sheets and related consolidated statements of income, comprehensive income, stockholders’ equity, and cash flows reflects all adjustments that are, in management’s opinion, necessary for a fair and consistent presentation of financial position, results of operations, and cash flows in accordance with U.S. generally accepted accounting principles ("GAAP").

The accompanying financial statements should be read in conjunction with the notes to Piedmont’s financial statements and Management’s Discussion and Analysis of Financial Condition and Results of Operations included in this report on Form 10-Q and with Piedmont’s Amended Annual Report on Form 10-K/A for the year ended December 31, 2016. Piedmont’s results of operations for the nine months endedSeptember 30, 2017 are not necessarily indicative of the operating results expected for the full year.

5

PIEDMONT OFFICE REALTY TRUST, INC.

CONSOLIDATED BALANCE SHEETS

(in thousands, except for share and per share amounts)

	(Unaudited)
	September 30, 2017			December 31, 2016
Assets:
Real estate assets, at cost:
Land	$	614,934		$	617,138
Buildings and improvements, less accumulated depreciation of $926,105 and $856,254 as of September 30, 2017 and December 31, 2016, respectively	2,723,163			2,754,106
Intangible lease assets, less accumulated amortization of $93,265 and $109,152 as of September 30, 2017 and December 31, 2016, respectively	78,700			99,695
Construction in progress	8,957			34,814
Real estate assets held for sale, net	—			225,939
Total real estate assets	3,425,754			3,731,692
Investments in and amounts due from unconsolidated joint ventures	49			7,360
Cash and cash equivalents	36,108			6,992
Tenant receivables, net of allowance for doubtful accounts of $535 and $197 as of September 30, 2017 and December 31, 2016, respectively	12,802			26,494
Straight-line rent receivables	182,609			163,789
Restricted cash and escrows	1,260			1,212
Prepaid expenses and other assets	28,232			23,201
Goodwill	98,918			98,918
Interest rate swaps	34			—
Deferred lease costs, less accumulated amortization of $189,469 and $175,643 as of September 30, 2017 and December 31, 2016, respectively	274,884			298,695
Other assets held for sale, net	—			9,815
Total assets	$	4,060,650		$	4,368,168
Liabilities:
Unsecured debt, net of discount and unamortized debt issuance costs of $8,337 and $10,269 as of September 30, 2017 and December 31, 2016, respectively	$	1,511,663		$	1,687,731
Secured debt, net of premiums and unamortized debt issuance costs of $1,020 and $1,161 as of September 30, 2017 and December 31, 2016, respectively	191,923			332,744
Accounts payable, accrued expenses, and accrued capital expenditures	108,120			165,410
Deferred income	29,970			28,406
Intangible lease liabilities, less accumulated amortization of $54,637 and $49,225 as of September 30, 2017 and December 31, 2016, respectively	41,064			48,005
Interest rate swaps	3,915			8,169
Total liabilities	1,886,655			2,270,465
Commitments and Contingencies	—			—
Stockholders’ Equity:
Shares-in-trust, 150,000,000 shares authorized; none outstanding as of September 30, 2017 or December 31, 2016	—			—
Preferred stock, no par value, 100,000,000 shares authorized; none outstanding as of September 30, 2017 or December 31, 2016	—			—
Common stock, $.01 par value, 750,000,000 shares authorized; 145,294,845 and 145,235,313 shares issued and outstanding as of September 30, 2017 and December 31, 2016, respectively	1,453			1,452
Additional paid-in capital	3,676,706			3,673,128
Cumulative distributions in excess of earnings	(1,511,428		)	(1,580,863		)
Other comprehensive income	5,400			2,104
Piedmont stockholders’ equity	2,172,131			2,095,821
Noncontrolling interest	1,864			1,882
Total stockholders’ equity	2,173,995			2,097,703
Total liabilities and stockholders’ equity	$	4,060,650		$	4,368,168

See accompanying notes

6

PIEDMONT OFFICE REALTY TRUST, INC.

CONSOLIDATED STATEMENTS OF INCOME

(in thousands, except for share and per share amounts)

	(Unaudited)						(Unaudited)
	Three Months Ended						Nine Months Ended
	September 30,						September 30,
	2017			2016			2017			2016
Revenues:
Rental income	$	113,350		$	113,821		$	361,048		$	340,326
Tenant reimbursements	23,796			24,163			72,340			70,000
Property management fee revenue	441			501			1,341			1,478
	137,587			138,485			434,729			411,804
Expenses:
Property operating costs	54,090			54,867			165,253			161,438
Depreciation	30,000			31,610			90,827			94,948
Amortization	18,123			18,640			57,852			53,848
Impairment loss on real estate assets	—			22,951			—			33,901
General and administrative	6,618			7,429			23,250			23,518
	108,831			135,497			337,182			367,653
Real estate operating income	28,756			2,988			97,547			44,151
Other income (expense):
Interest expense	(16,183		)	(15,496		)	(52,661		)	(48,294		)
Other income/(expense)	290			(720		)	228			(467		)
Net recoveries from casualty events	—			34			—			34
Equity in income of unconsolidated joint ventures	3,754			129			3,872			354
	(12,139		)	(16,053		)	(48,561		)	(48,373		)
Income/(loss) from continuing operations	16,617			(13,065		)	48,986			(4,222		)
Discontinued operations:
Operating income	—			1			—			—
Income from discontinued operations	—			1			—			—
Gain/(loss) on sale of real estate assets, net	109,512			(57		)	115,951			73,758
Net income/(loss)	126,129			(13,121		)	164,937			69,536
Plus: Net income applicable to noncontrolling interest	4			14			10			7
Net income/(loss) applicable to Piedmont	$	126,133		$	(13,107	)	$	164,947		$	69,543
Per share information – basic and diluted:
Income/(loss) from continuing operations and gain/(loss) on sale of real estate assets	$	0.87		$	(0.09	)	$	1.13		$	0.48
Income from discontinued operations	—			—			—			—
Net income applicable to common stockholders	$	0.87		$	(0.09	)	$	1.13		$	0.48
Weighted-average common shares outstanding – basic	145,415,678			145,231,160			145,372,182			145,228,755
Weighted-average common shares outstanding – diluted	145,719,431			145,669,237			145,679,582			145,601,026

See accompanying notes

7

PIEDMONT OFFICE REALTY TRUST, INC.

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

(in thousands)

	(Unaudited)							(Unaudited)
	Three Months Ended							Nine Months Ended
	September 30,							September 30,
	2017			2016				2017			2016
Net income/(loss) applicable to Piedmont		$	126,133		$	(13,107	)		$	164,947			$	69,543
Other comprehensive income/(loss):
Effective portion of gain/(loss) on derivative instruments that are designated and qualify as cash flow hedges (See Note 5)	175			2,847				307			(12,182	)
Plus: Reclassification of previously recorded loss included in net income (See Note 5)	653			1,045				2,936			3,291
Gain on investment in available for sale securities	25			7				53			19
Other comprehensive income/(loss)		853			3,899				3,296				(8,872		)
Comprehensive income/(loss) applicable to Piedmont		$	126,986		$	(9,208	)		$	168,243			$	60,671

See accompanying notes

8

PIEDMONT OFFICE REALTY TRUST, INC.

CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY

FOR THE YEAR ENDED DECEMBER 31, 2016

AND FOR THE NINE MONTHS ENDEDSEPTEMBER 30, 2017 (UNAUDITED)

(in thousands, except per share amounts)

	Common  Stock					Additional Paid-In Capital			Cumulative Distributions in Excess of Earnings			Other Comprehensive Income/(Loss)		Non- controlling Interest			Total Stockholders’ Equity
	Shares		Amount
Balance, December 31, 2015	145,512		$	1,455		$	3,669,977		$	(1,550,698	)	$	1,661	$	1,025		$	2,123,420
Share repurchases as part of an announced plan	(462	)	(5		)	—			(7,938		)	—		—			(7,943		)
Offering costs	—		—			(342		)	—			—		—			(342		)
Noncontrolling interest in consolidated joint venture	—		—			—			—			—		888			888
Dividends to common stockholders ($0.84 per share), dividends to preferred stockholders of subsidiary, and dividends reinvested	—		—			(173		)	(121,959		)	—		(16		)	(122,148		)
Shares issued and amortized under the 2007 Omnibus Incentive Plan, net of tax	185		2			3,666			—			—		—			3,668
Net income applicable to noncontrolling interest	—		—			—			—			—		(15		)	(15		)
Net income applicable to Piedmont	—		—			—			99,732			—		—			99,732
Other comprehensive income	—		—			—			—			443		—			443
Balance, December 31, 2016	145,235		1,452			3,673,128			(1,580,863		)	2,104		1,882			2,097,703
Share repurchases as part of an announced plan	(195	)	(2		)				(3,893		)						(3,895		)
Offering costs						(97		)									(97		)
Dividends to common stockholders ($0.63 per share), dividends to preferred stockholders of subsidiary, and dividends reinvested						(79		)	(91,619		)			(8		)	(91,706		)
Shares issued and amortized under the 2007 Omnibus Incentive Plan, net of tax	255		3			3,754											3,757
Net income applicable to noncontrolling interest														(10		)	(10		)
Net income applicable to Piedmont									164,947								164,947
Other comprehensive income												3,296					3,296
Balance, September 30, 2017	145,295		$	1,453		$	3,676,706		$	(1,511,428	)	$	5,400	$	1,864		$	2,173,995

See accompanying notes

9

PIEDMONT OFFICE REALTY TRUST, INC.

CONSOLIDATED STATEMENTS OF CASH FLOWS

(in thousands) 

	(Unaudited)
	Nine Months Ended
	September 30,
	2017			2016
Cash Flows from Operating Activities:
Net income	$	164,937		$	69,536
Operating distributions received from unconsolidated joint ventures	—			579
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	90,827			94,948
Amortization of debt issuance costs	1,214			1,264
Other amortization	57,146			53,325
Impairment loss on real estate assets	—			33,901
Stock compensation expense	6,657			7,630
Equity in income of unconsolidated joint ventures	(3,872		)	(354		)
Gain on sale of real estate assets, net	(115,951		)	(73,758		)
Changes in assets and liabilities:
Decrease in tenant and straight-line rent receivables, net	(15,040		)	(17,393		)
(Increase)/decrease in restricted cash and escrows	(656		)	3,451
Increase in prepaid expenses and other assets	(4,580		)	(3,429		)
(Decrease)/increase in accounts payable and accrued expenses	(5,863		)	307
Decrease in deferred income	1,513			2,029
Net cash provided by operating activities	176,332			172,036
Cash Flows from Investing Activities:
Acquisition of real estate assets, related intangibles, and cash held in escrow for acquisitions	—			(66,900		)
Capitalized expenditures, net of accruals	(65,407		)	(88,391		)
Investment in consolidated joint venture	—			(165,848		)
Net sales proceeds from wholly-owned properties	375,199			304,902
Net sales proceeds from unconsolidated joint ventures	12,334			—
Investments in unconsolidated joint ventures	(1,162		)	—
Deferred lease costs paid	(19,419		)	(15,345		)
Net cash provided by/(used in) investing activities	301,545			(31,582		)
Cash Flows from Financing Activities:
Debt issuance costs paid	(101		)	(212		)
Proceeds from debt	147,000			552,000
Repayments of debt	(466,046		)	(589,532		)
Costs of issuance of common stock	(97		)	(239		)
Value of shares withheld to pay tax obligations related to employee stock compensation	(3,385		)	(2,328		)
Repurchases of common stock as part of announced plan	(3,895		)	(7,943		)
Dividends paid and discount on dividend reinvestments	(122,237		)	(91,609		)
Net cash used in financing activities	(448,761		)	(139,863		)
Net increase in cash and cash equivalents	29,116			591
Cash and cash equivalents, beginning of period	6,992			5,441
Cash and cash equivalents, end of period	$	36,108		$	6,032
Supplemental Disclosures of Significant Noncash Investing and Financing Activities:
Accrued dividends and discount on dividend reinvestments	$	(30,531	)	$	—
Accrued capital expenditures and deferred lease costs	$	8,590		$	24,624
Investment in consolidated joint venture	$	63,026		$	—

See accompanying notes

10

PIEDMONT OFFICE REALTY TRUST, INC.

CONDENSED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

SEPTEMBER 30, 2017

(unaudited)

1.Organization

Piedmont Office Realty Trust, Inc. (“Piedmont”) (NYSE: PDM) is a Maryland corporation that operates in a manner so as to qualify as a real estate investment trust (“REIT”) for federal income tax purposes and engages in the acquisition, development, management, and ownership of commercial real estate properties throughout the United States, including properties that are under construction, are newly constructed, or have operating histories. Piedmont was incorporated in 1997 and commenced operations in 1998. Piedmont conducts business primarily through Piedmont Operating Partnership, L.P. (“Piedmont OP”), a Delaware limited partnership, as well as performing the management of its buildings through two wholly-owned subsidiaries, Piedmont Government Services, LLC and Piedmont Office Management, LLC. Piedmont owns 99.9% of, and is the sole general partner of, Piedmont OP and as such, possesses full legal control and authority over the operations of Piedmont OP. The remaining 0.1% ownership interest of Piedmont OP is held indirectly by Piedmont through its wholly-owned subsidiary, Piedmont Office Holdings, Inc. ("POH"), the sole limited partner of Piedmont OP. Piedmont OP owns properties directly, through wholly-owned subsidiaries, and through consolidated joint ventures. References to Piedmont herein shall include Piedmont and all of its subsidiaries, including Piedmont OP and its subsidiaries and joint ventures.

As of September 30, 2017, Piedmont owned 66 in-service office properties. Piedmont's total consolidated portfolio consists of approximately 19 million square feet of primarily Class A commercial office space, and was 89.2% leased as of September 30, 2017. As of September 30, 2017, approximately 88% of Piedmont's ALR was generated from select sub-markets located primarily within eight major office markets located in the Eastern-half of the United States: Atlanta, Boston, Chicago, Dallas, Minneapolis, New York, Orlando, and Washington, D.C.

Piedmont internally evaluates all of its real estate assets as one operating segment, and accordingly, does not report segment information.

2.Summary of Significant Accounting Policies

Basis of Presentation and Principles of Consolidation

The consolidated financial statements of Piedmont have been prepared in accordance with the rules and regulations of the Securities and Exchange Commission (the “SEC”), including the instructions to Form 10-Q and Article 10 of Regulation S-X, and do not include all of the information and footnotes required by GAAP for complete financial statements. In the opinion of management, the statements for the unaudited interim periods presented include all adjustments, which are of a normal and recurring nature, necessary for a fair presentation of the results for such periods. Results for these interim periods are not necessarily indicative of a full year’s results.

Piedmont’s consolidated financial statements include the accounts of Piedmont, Piedmont’s wholly-owned subsidiaries, any variable interest entity ("VIE") for which Piedmont or any of its wholly-owned subsidiaries is considered to have the power to direct the activities of the entity and the obligation to absorb losses/right to receive benefits, or any entity in which Piedmont or any of its wholly-owned subsidiaries owns a controlling interest. In determining whether Piedmont or Piedmont OP has a controlling interest, the following factors, among others, are considered: equity ownership, voting rights, protective rights of investors, and participatory rights of investors. For further information, refer to the financial statements and footnotes included in Piedmont’s Amended Annual Report on Form 10-K/A for the year ended December 31, 2016.

All intercompany balances and transactions have been eliminated upon consolidation.

Further, Piedmont has formed special purpose entities to acquire and hold real estate. Each special purpose entity is a separate legal entity. Consequently, the assets of these special purpose entities are not available to all creditors of Piedmont. The assets owned by these special purpose entities are being reported on a consolidated basis with Piedmont’s assets for financial reporting purposes only.

11

Use of Estimates

The preparation of the accompanying consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the amounts reported in the accompanying consolidated financial statements and notes. Actual results could differ from those estimates.

Income Taxes

Piedmont has elected to be taxed as a REIT under the Internal Revenue Code of 1986, as amended, and has operated as such, beginning with its taxable year ended December 31, 1998. To qualify as a REIT, Piedmont must meet certain organizational and operational requirements, including a requirement to distribute at least 90% of its annual REIT taxable income. As a REIT, Piedmont is generally not subject to federal income taxes, subject to fulfilling, among other things, this distribution requirement. Piedmont is subject to certain taxes related to the operations of properties in certain locations, as well as operations conducted by its taxable REIT subsidiary, POH, which have been provided for in the financial statements.

Reclassifications

Certain prior period amounts presented in Piedmont's Amended Annual Report on Form 10-K/A for the year ended December 31, 2016 have been reclassified to conform to the current period financial statement presentation. The reclassifications relate to the Two Independence Square building, located in Washington, D.C., which was first classified as held for sale as of March 31, 2017, and was sold on July 5, 2017. Applicable balances related to the same asset remain classified as held for sale as of December 31, 2016.

Recent Accounting Pronouncements

The Financial Accounting Standards Board (the "FASB") has issued Accounting Standards Update No. 2014-09, Revenue from Contracts with Customers (Topic 606) ("ASU 2014-09") and Accounting Standards Update No. 2016-08, Revenue from Contracts with Customers (Topic 606) Principal versus Agent Considerations (Reporting Revenue Gross versus Net) ("ASU 2016-08"). The amendments in ASU 2014-09, which are further clarified in ASU 2016-08, as well as Accounting Standards Update 2016-10, Accounting Standards Update 2016-12, and Accounting Standards Update 2016-20 (collectively the "Revenue Recognition Amendments"), change the criteria for the recognition of certain revenue streams to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services using a five-step determination process. Steps 1 through 5 involve (i) identifying contracts with a customer, (ii) identifying the performance obligations in the contract, (iii) determining the transaction price, (iv) allocating the transaction price to the performance obligations, and (v) recognizing revenue as an entity satisfies a performance obligation. The revenues impacted by the Revenue Recognition Amendments include a portion of Piedmont's tenant reimbursement revenues and property management fee revenues. Lease contracts and reimbursement revenues associated with property taxes and insurance are specifically excluded from the Revenue Recognition Amendments. The Revenue Recognition Amendments are effective in the first quarter of 2018 for Piedmont. Management has substantially completed its initial assessment of the impact of adoption of the Revenue Recognition Amendments. Approximately 90% of Piedmont's total revenues are derived from either long-term leases with its tenants or reimbursement of property tax and insurance expenses, which are excluded from the scope of the Revenue Recognition Amendments. In addition, based on management's assessment to date, Piedmont does not expect the timing of the recognition of reimbursement revenue and revenue from management agreements to change as a result of the new guidance, though certain classifications will change between rental revenue and tenant reimbursements. Finally, management has determined, and the FASB has confirmed, that the evaluation of non-lease components under the new Revenue Recognition Amendments will not be effective until Accounting Standards Update No. 2016-02, Leases (Topic 842), ("ASU 2016-02") becomes effective (see further discussion below), which will be first quarter of 2019 for Piedmont. Although management continues to evaluate the guidance and disclosures required by the Revenue Recognition Amendments, Piedmont does not anticipate any material impact to its consolidated financial statements as a result of adoption.

The FASB has issued Accounting Standards Update No. 2017-05, Other Income—Gains and Losses from the Derecognition of Nonfinancial Assets (Subtopic 610-20): Clarifying the Scope of Asset Derecognition Guidance and Accounting for Partial Sales of Nonfinancial Assets ("ASU 2017-05"). The provisions of ASU 2017-05 define the term "in substance nonfinancial asset" as a financial asset promised to a counterparty in a contract if substantially all of the fair value of the assets (recognized and unrecognized) is concentrated in nonfinancial assets. Further, it states that nonfinancial assets should be derecognized once the counterparty obtains control. Finally, the amendments provide clarification for partial sales of nonfinancial assets. ASU 2017-05 is effective concurrent with the Revenue Recognition Amendments (detailed above), which will be the first quarter of 2018 for Piedmont. Although management continues to evaluate the guidance and disclosures required by ASU 2017-05, Piedmont does not anticipate a material change in how it recognizes, measures, and classifies the gain or loss on the disposition of real estate in its consolidated

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financial statements as a result of adoption.

The FASB has issued Accounting Standards Update No. 2016-01, Financial Instruments - Overall (Subtopic 825-10), Recognition and Measurement of Financial Assets and Financial Liabilities ("ASU 2016-01"). The amendments in ASU 2016-01 require equity investments, except those accounted for under the equity method of accounting, to be measured at estimated fair value with changes in fair value recognized in net income. Additionally, ASU 2016-01 simplifies the impairment assessment of equity investments, and eliminates certain disclosure requirements. The amendments in ASU 2016-01 are effective in the first quarter of 2018, and Piedmont does not anticipate any material impact to its consolidated financial statements as a result of adoption.

The FASB has issued Accounting Standards Update No. 2016-18, Statement of Cash Flows (Topic 230),Restricted Cash (a consensus of the FASB Emerging Issues Task Force) ("ASU 2016-18"). The provisions of ASU 2016-18 require entities to show changes in restricted cash and cash equivalents in addition to cash and cash equivalents in the statement of cash flows. As a result, entities will no longer present transfers between restricted and unrestricted cash in the statement of cash flows. Disclosures are required to reconcile the amount presented on the statement of cash flows to the balance sheet, as well as disclosing the nature of restriction on the restricted cash balances. ASU 2016-18 is effective for Piedmont in the first quarter of 2018, with early adoption permitted. Piedmont does not anticipate any material impact to its consolidated financial statements as a result of adoption.

The FASB has issued ASU 2016-02, which fundamentally changes the definition of a lease, as well as the accounting for operating leases by requiring lessees to recognize assets and liabilities which arise from the lease, consisting of a liability to make lease payments (the lease liability) and a right-of-use asset, representing the right to use the leased asset over the term of the lease. Accounting for leases by lessors is substantially unchanged from prior practice as lessors will continue to recognize lease revenue on a straight-line basis; however, ASU 2016-02 defines certain tenant reimbursements as non-lease components which will be subject to the guidance under ASU 2014-09. The amendments in ASU 2016-02 are effective in the first quarter of 2019, and Piedmont is currently evaluating the potential impact of adoption.

The FASB has issued Accounting Standards Update No. 2016-13, Financial Instruments—Credit Losses (Topic 326),Measurement of Credit Losses on Financial Instruments ("ASU 2016-13"). The provisions of ASU 2016-13 replace the "incurred loss" approach with an "expected loss" model for impairing trade and other receivables, held-to-maturity debt securities, net investment in leases, and off-balance-sheet credit exposures, which will generally result in earlier recognition of allowances for credit losses. Additionally, the provisions change the classification of credit losses related to available-for-sale securities to an allowance, rather than a direct reduction of the amortized cost of the securities. ASU 2016-13 is effective in the first quarter of 2020, with early adoption permitted as of January 1, 2019. Piedmont is currently evaluating the potential impact of adoption.

The FASB has issued Accounting Standards Update No. 2017-04, Intangibles—Goodwill and Other (Topic 350),Simplifying the Test for Goodwill Impairment ("ASU 2017-04"). The provisions of ASU 2017-04 simplify how an entity is required to test goodwill for impairment by eliminating Step 2 from the goodwill impairment test, which is generally performed annually unless events or circumstances arise which would necessitate evaluating the carrying value for impairment in the interim. Step 2 measures a goodwill impairment loss by comparing the implied fair value of a entity’s goodwill with the carrying amount of that goodwill by determining the fair value of its assets and liabilities (including unrecognized assets and liabilities) following the procedures that would be required in a business combination. Under the provisions of ASU 2017-04, an entity would instead recognize an impairment charge for the amount by which the carrying amount exceeds the entity’s fair value; however, the loss recognized should not exceed the total amount of goodwill allocated to that entity. ASU 2017-04 is effective in the first quarter of 2020, with early adoption permitted as of the first interim or annual impairment test of goodwill after January 1, 2017. Piedmont is currently evaluating the potential impact of adoption.

3.Debt

During the three months ended September 30, 2017, Piedmont fully repaid the $140 Million WDC Fixed-Rate Loans prior to the maturity date without penalty and repaid the outstanding balance of the $500 Million Unsecured 2015 Line of Credit, using a portion of the net proceeds from the sale of the Two Independence Square building (see Note 9).

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The following table summarizes the terms of Piedmont’s indebtedness outstanding as of September 30, 2017 and December 31, 2016 (in thousands):

Facility (1)	Stated Rate		Effective Rate (2)			Maturity		Amount Outstanding as of
								September 30, 2017		December 31, 2016
Secured (Fixed)
$140 Million WDC Fixed-Rate Loans	5.76	%	5.76	%		11/1/2017		$	—	$	140,000
$35 Million Fixed-Rate Loan (3)	5.55	%	3.75	%		9/1/2021		30,903		31,583
$160 Million Fixed-Rate Loan (4)	3.48	%	3.58	%		7/5/2022		160,000		160,000
Net premium and unamortized debt issuance costs								1,020		1,161
Subtotal/Weighted Average (5)	3.82	%						191,923		332,744
Unsecured (Variable and Fixed)
$170 Million Unsecured 2015 Term Loan (6)	LIBOR + 1.125%		2.37	%		5/15/2018		170,000		170,000
$300 Million Unsecured 2013 Term Loan	LIBOR + 1.20%		2.78	%	(7)	1/31/2019		300,000		300,000
$500 Million Unsecured 2015 Line of Credit (6)	LIBOR + 1.00%		—	%		6/18/2019	(8)	—		178,000
$300 Million Unsecured 2011 Term Loan	LIBOR +  1.15%		3.35	%	(7)	1/15/2020		300,000		300,000
$350 Million Senior Notes	3.40	%	3.43	%		6/01/2023		350,000		350,000
$400 Million Senior Notes	4.45	%	4.10	%		3/15/2024		400,000		400,000
Discounts and unamortized debt issuance costs								(8,337)		(10,269)
Subtotal/Weighted Average (5)	3.43	%						1,511,663		1,687,731
Total/Weighted Average (5)	3.47	%						$	1,703,586	$	2,020,475

⁽¹⁾  Other than the $35 Million Fixed-Rate Loan, all of Piedmont’s outstanding debt as of September 30, 2017 and December 31, 2016 is interest-only.

⁽²⁾  Effective rate after consideration of settled or in-place interest rate swap agreements, issuance premiums/discounts, and/or fair market value adjustments upon assumption of debt.

⁽³⁾  Collateralized by the 5 Wall Street building in Burlington, Massachusetts.

⁽⁴⁾  Collateralized by the 1901 Market Street building in Philadelphia, Pennsylvania.

⁽⁵⁾  Weighted average is based on contractual balance of outstanding debt and the stated or effectively fixed interest rates in the table as of September 30, 2017.

⁽⁶⁾  On a periodic basis, Piedmont may select from multiple interest rate options, including the prime rate and various-length LIBOR locks. All LIBOR selections are subject to an additional spread over the selected rate based on Piedmont’s current credit rating.

⁽⁷⁾  Facility has a stated variable rate; however, Piedmont has entered into interest rate swap agreements which effectively fix, exclusive of Piedmont's credit rating, the rate shown as the effective rate.

⁽⁸⁾  Piedmont may extend the term for up to one additional year (through two available six month extensions to a final extended maturity date of June 18, 2020) provided Piedmont is not then in default and upon payment of extension fees.

Piedmont made interest payments on all debt facilities, including interest rate swap cash settlements, of approximately $18.0 million and $18.5 million for the three months endedSeptember 30, 2017 and 2016, respectively, and approximately $54.0 million and $53.2 million for the nine months endedSeptember 30, 2017 and 2016, respectively. Also, Piedmont capitalized interest of approximately $37,000 and $1.5 million for the three months endedSeptember 30, 2017 and 2016, respectively, and approximately $0.2 million and $3.4 million for the nine months endedSeptember 30, 2017 and 2016, respectively. As of September 30, 2017, Piedmont believes it was in compliance with all financial covenants associated with its debt instruments. See Note 6 for a description of Piedmont’s estimated fair value of debt as of September 30, 2017.

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4.Variable Interest Entities

Variable interest holders who have the power to direct the activities of the VIE that most significantly impact the entity’s economic performance and have the obligation to absorb the majority of losses of the entity or the right to receive significant benefits of the entity must consolidate the VIE. Each of the following VIEs has the sole purpose of holding land and office buildings and their resulting operations, and are classified in the accompanying consolidated balance sheets in the same manner as Piedmont’s wholly-owned properties.

A summary of Piedmont’s interests in, and consolidation treatment of, its VIEs and their related carrying values as of September 30, 2017 and December 31, 2016 is as follows (net carrying amount in millions):

Entity	Piedmont’s % Ownership of Entity		Related Building	Consolidated/ Unconsolidated	Net Carrying Amount as of September 30, 2017		Net Carrying Amount as of December 31, 2016			Primary Beneficiary Considerations
1201 Eye Street N.W. Associates, LLC	98.6%	(1)	1201 Eye Street	Consolidated	$	82.1	$	(6.7	)	In accordance with the partnership’s governing documents, Piedmont currently receives 100% of the cash flow of the entity and has sole discretion in directing the management and leasing activities of the building.
1225 Eye Street N.W. Associates, LLC	98.1%	(1)	1225 Eye Street	Consolidated	$	66.2	$	9.9		In accordance with the partnership’s governing documents, Piedmont currently receives 100% of the cash flow of the entity and has sole discretion in directing the management and leasing activities of the building.
Piedmont 500 W. Monroe Fee, LLC	100%		500 W. Monroe	Consolidated	$	265.2	$	262.4		The Omnibus Agreement with the previous owner includes equity participation rights for the previous owner, if certain financial returns are achieved; however, Piedmont has sole decision making authority and is entitled to 100% of the economic benefits of the property until such returns are met.

⁽¹⁾ During the three months endedSeptember 30, 2017, Piedmont repaid a $140 million mortgage secured by the 1201 and 1225 Eye Street properties located in Washington, D.C., and recapitalized the 1201 and 1225 Eye Street N.W. Associates, LLCs, increasing Piedmont's ownership from 49.5% in each of the LLCs to the amounts stated above.

5.Derivative Instruments

Risk Management Objective of Using Derivatives

In addition to operational risks which arise in the normal course of business, Piedmont is exposed to economic risks such as interest rate, liquidity, and credit risk. In certain situations, Piedmont has entered into derivative financial instruments such as interest rate swap agreements and other similar agreements to manage interest rate risk exposure arising from current or future variable rate debt transactions. Interest rate swap agreements involve the receipt or payment of future known and uncertain cash amounts, the value of which are determined by interest rates. Piedmont’s objective in using interest rate derivatives is to add stability to interest expense and to manage its exposure to interest rate movements.

Cash Flow Hedges of Interest Rate Risk

Interest rate swaps designated as cash flow hedges involve the receipt of variable-rate amounts from a counterparty in exchange for Piedmont making fixed-rate payments over the life of the agreements without changing the underlying notional amount. As of September 30, 2017, Piedmont was party to various interest rate swap agreements, all of which are designated as effective cash flow hedges and fully hedge the variable cash flows covering the entire outstanding balances of the $300 Million Unsecured 2011 Term Loan and the $300 Million Unsecured 2013 Term Loan. The maximum length of time over which Piedmont is hedging its exposure to the variability in future cash flows for forecasted transactions is 27 months.

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A detail of Piedmont’s interest rate derivatives outstanding as of September 30, 2017 is as follows:

Interest Rate Derivatives:	Number of Swap Agreements	Associated Debt Instrument	Total Notional Amount (in millions)		Effective Date	Maturity Date
Interest rate swaps	4	$300 Million Unsecured 2013 Term Loan	$	200	1/30/2014	1/31/2019
Interest rate swaps	2	$300 Million Unsecured 2013 Term Loan	100		8/29/2014	1/31/2019
Interest rate swaps	3	$300 Million Unsecured 2011 Term Loan	300		11/22/2016	1/15/2020
Total			$	600

Piedmont presents its interest rate derivatives on its consolidated balance sheets on a gross basis as interest rate swap assets and interest rate swap liabilities. A detail of Piedmont’s interest rate derivatives on a gross and net basis as of September 30, 2017 and December 31, 2016, respectively, is as follows (in thousands):

Interest rate swaps classified as:	September 30, 2017			December 31, 2016
Gross derivative assets	$	34		$	—
Gross derivative liabilities	(3,915		)	(8,169		)
Net derivative asset/(liability)	$	(3,881	)	$	(8,169	)

The effective portion of Piedmont's interest rate derivatives, including the gain/(loss) on previously settled forward swaps, that was recorded in the accompanying consolidated statements of income for the three and nine months endedSeptember 30, 2017 and 2016, respectively, was as follows (in thousands):

	Three Months Ended				Nine Months Ended
Interest Rate Swaps in Cash Flow Hedging Relationships	September 30, 2017		September 30, 2016		September 30, 2017		September 30, 2016
Amount of gain/(loss) recognized in OCI	$	175	$	2,847	$	307	$	(12,182	)
Amount of previously recorded loss reclassified from accumulated OCI into interest expense	$	653	$	1,045	$	2,936	$	3,291

Piedmont estimates that approximately $1.2 million will be reclassified from accumulated other comprehensive loss to interest expense over the next twelve months. Piedmont recognized no loss related to hedge ineffectiveness of its cash flow hedges during the three and nine months endedSeptember 30, 2017 and 2016, respectively.

Additionally, see Note 6 for fair value disclosures of Piedmont's derivative instruments.

Credit-risk-related Contingent Features

Piedmont has agreements with its derivative counterparties that contain a provision whereby if Piedmont defaults on any of its indebtedness, including default where repayment of the indebtedness has not been accelerated by the lender, then Piedmont could also be declared in default on its derivative obligations. If Piedmont were to breach any of the contractual provisions of the derivative contracts, it could be required to settle its obligations under the agreements at their termination value of the estimated fair values plus accrued interest, or approximately $4.0 million as of September 30, 2017. Additionally, Piedmont has rights of set-off under certain of its derivative agreements related to potential termination fees and amounts payable under the agreements, if a termination were to occur.

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6.Fair Value Measurement of Financial Instruments

Piedmont considers its cash and cash equivalents, tenant receivables, restricted cash and escrows, accounts payable and accrued expenses, interest rate swap agreements, and debt to meet the definition of financial instruments. The following table sets forth the carrying and estimated fair value for each of Piedmont’s financial instruments, as well as its level within the GAAP fair value hierarchy, as of September 30, 2017 and December 31, 2016, respectively (in thousands):

	September 30, 2017					December 31, 2016
Financial Instrument	Carrying Value		Estimated Fair Value		Level Within Fair Value Hierarchy	Carrying Value		Estimated Fair Value		Level Within Fair Value Hierarchy
Assets:
Cash and cash equivalents(1)	$	36,108	$	36,108	Level 1	$	6,992	$	6,992	Level 1
Tenant receivables, net(1)	$	12,802	$	12,802	Level 1	$	26,494	$	26,494	Level 1
Restricted cash and escrows(1)	$	1,260	$	1,260	Level 1	$	1,212	$	1,212	Level 1
Interest rate swaps	$	34	$	34	Level 2	$	—	$	—	Level 2
Liabilities:
Accounts payable and accrued expenses(1)	$	13,465	$	13,465	Level 1	$	44,733	$	44,733	Level 1
Interest rate swaps	$	3,915	$	3,915	Level 2	$	8,169	$	8,169	Level 2
Debt, net	$	1,703,586	$	1,731,584	Level 2	$	2,020,475	$	2,027,436	Level 2

⁽¹⁾  For the periods presented, the carrying value of these financial instruments approximates estimated fair value due to their short-term maturity.

Piedmont's debt was carried at book value as of September 30, 2017 and December 31, 2016; however, Piedmont's estimate of its estimated fair value is disclosed in the table above. Piedmont uses widely accepted valuation techniques including discounted cash flow analysis based on the contractual terms of the debt facilities, including the period to maturity of each instrument, and uses observable market-based inputs for similar debt facilities which have transacted recently in the market. Therefore, the estimated fair values determined are considered to be based on significant other observable inputs (Level 2). Scaling adjustments are made to these inputs to make them applicable to the remaining life of Piedmont's outstanding debt. Piedmont has not changed its valuation technique for estimating the fair value of its debt.

Piedmont’s interest rate swap and forward starting interest rate swap agreements presented above, and further discussed in Note 5, are classified as “Interest rate swap” assets and liabilities in the accompanying consolidated balance sheets and were carried at estimated fair value as of September 30, 2017 and December 31, 2016. The valuation of these derivative instruments was determined using widely accepted valuation techniques including discounted cash flow analysis based on the contractual terms of the derivatives, including the period to maturity of each instrument, and uses observable market-based inputs, including interest rate curves and implied volatilities. Therefore, the estimated fair values determined are considered to be based on significant other observable inputs (Level 2). In addition, Piedmont considered both its own and the respective counterparties’ risk of nonperformance in determining the estimated fair value of its derivative financial instruments by estimating the current and potential future exposure under the derivative financial instruments that both Piedmont and the counterparties were at risk for as of the valuation date. The credit risk of Piedmont and its counterparties were factored into the calculation of the estimated fair value of the interest rate swaps; however, as of September 30, 2017 and December 31, 2016, this credit valuation adjustment did not comprise a material portion of the estimated fair value. Therefore, Piedmont believes that any unobservable inputs used to determine the estimated fair values of its derivative financial instruments are not significant to the fair value measurements in their entirety, and does not consider any of its derivative financial instruments to be Level 3 assets or liabilities.

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7.Impairment Loss on Real Estate Assets

Piedmont recorded impairment loss on real estate assets for the three and nine months endedSeptember 30, 2017 and 2016, respectively, as follows (in thousands):

	Three Months Ended				Nine Months Ended
	September 30, 2017		September 30, 2016		September 30, 2017		September 30, 2016
150 West Jefferson(1)	$	—	$	—	$	—	$	8,258
9221 Corporate Boulevard (2)	—		—		—		2,692
9200 and 9211 Corporate Boulevard(3)	—		22,951		—		22,951
Total impairment loss on real estate assets(4)	$	—	$	22,951	$	—	$	33,901

⁽¹⁾  Piedmont recognized an impairment loss on real estate assets based upon the difference between the carrying value of the asset and the anticipated contract sales price, less estimated selling costs.

⁽²⁾  Piedmont, using a probability-weighted model heavily weighted towards the short-term sale of the 9221 Corporate Boulevard building in Rockville, Maryland, determined that the carrying value would not be recovered from the undiscounted future operating cash flows expected from the use of the asset and its eventual disposition. As a result, Piedmont recognized a loss on impairment of approximately $2.7 million during the nine months ended September 30, 2016 calculated as the difference between the carrying value of the asset and the anticipated contract sales price, less estimated selling costs.

⁽³⁾  Piedmont elected to sell its remaining two assets and exit the Rockville, Maryland sub-market of Washington, D.C, after selling the 9221 Corporate Boulevard building in July 2016 (mentioned above). Upon management's change in its hold period assumption for the assets from a long-term hold to a near-term sale, Piedmont recognized an impairment loss of approximately $23.0 million. The impairment loss was calculated as the difference between the carrying value of the asset and the anticipated contracted sales price, less estimated selling costs. Piedmont reclassified the properties as held for sale, recognized an impairment loss, entered into a binding contract, and subsequently sold the 9200 and 9211 Corporate Boulevard buildings during the three months ended September 30, 2016.

⁽⁴⁾  The fair value measurements used in the evaluation of the non-financial assets above are considered to be Level 1 valuations within the fair value hierarchy as defined by GAAP, as there are direct observations and transactions involving the assets by unrelated, third-party purchasers.

8.Commitments and Contingencies

Commitments Under Existing Lease Agreements

Under its existing lease agreements, Piedmont may be required to fund significant tenant improvements, leasing commissions, and building improvements. In addition, certain agreements contain provisions that require Piedmont to issue corporate or property guarantees to provide funding for capital improvements or other financial obligations. Piedmont classifies its capital improvements into two categories: (i) improvements which maintain the building's existing asset value and its revenue generating capacity (“non-incremental capital expenditures”) and (ii) improvements which incrementally enhance the building's asset value by expanding its revenue generating capacity (“incremental capital expenditures”). As of September 30, 2017, commitments to fund potential non-incremental capital expenditures over the next five years for tenant improvements totaled approximately $32.1 million related to Piedmont's existing lease portfolio over the respective lease terms, the majority of which Piedmont estimates may be required to be funded over the next three years based on when the underlying leases commence. For most of Piedmont’s leases, the timing of the actual funding of these tenant improvements is largely dependent upon tenant requests for reimbursement. In some cases, these obligations may expire with the leases without further recourse to Piedmont. As of September 30, 2017, commitments for incremental capital expenditures for tenant improvements associated with executed leases totaled approximately $15.2 million.

Contingencies Related to Tenant Audits/Disputes

Certain lease agreements include provisions that grant tenants the right to engage independent auditors to audit their annual operating expense reconciliations. Such audits may result in the re-interpretation of language in the lease agreements which could result in the refund of previously recognized tenant reimbursement revenues, resulting in financial loss to Piedmont. Piedmont recorded no such reductions in reimbursement revenues related to such tenant audits/disputes during the three months endedSeptember 30, 2017 and 2016, respectively, and $0.3 million and $0 of such reductions in reimbursement revenues related to such tenant audits/disputes during the nine months endedSeptember 30, 2017 and 2016, respectively.

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9.    Property Dispositions and Assets Held for Sale

Properties sold during the nine months endedSeptember 30, 2017 and 2016 did not meet the criteria to be reported as discontinued operations. The operational results for these properties prior to their sale dates are presented as continuing operations in the accompanying consolidated statements of income, and the gain/(loss) on sale is presented separately on the face of the income statement. Details of such properties sold are presented below (in thousands):

Buildings Sold	Location	Date of Sale	Gain/(Loss) on Sale			Net Sales Proceeds
1055 East Colorado Boulevard	Pasadena, California	April 21, 2016	$	29,461		$	60,076
Fairway Center II	Brea, California	April 28, 2016	$	14,405		$	33,062
1901 Main Street	Irvine, California	May 2, 2016	$	29,964		$	63,149
9221 Corporate Boulevard	Rockville, Maryland	July 27, 2016	$	(192	)	$	12,035
150 West Jefferson	Detroit, Michigan	July 29, 2016	$	(680	)	$	77,827
9200 and 9211 Corporate Boulevard	Rockville, Maryland	September 28, 2016	$	(41	)	$	12,518
Sarasota Commerce Center II	Sarasota, Florida	June 16, 2017	$	6,493		$	23,090
Two Independence Square	Washington, D.C.	July 5, 2017	$	109,516		$	352,180

Sale of the 8560 Upland Drive building

During the three months ended September 30, 2017, Piedmont sold its 72% interest in the 8560 Upland Drive building in Denver, Colorado for approximately $12.7 million which resulted in net sales proceeds of $12.3 million and a gain on sale of approximately $3.7 million, which is included in income from unconsolidated joint ventures in the accompanying consolidated statements of income.

Assets Held for Sale

In February 2017, Piedmont reclassified the Two Independence Square building from real estate assets held for use to real estate assets held for sale as a result of entering into a binding agreement to sell the property. The sale of the Two Independence Square building closed on July 5, 2017. Details of assets held for sale as of September 30, 2017 and December 31, 2016 are presented below (in thousands):

	September 30, 2017		December 31, 2016
Real estate assets held for sale, net:
Land	$	—	$	52,710
Building and improvements, less accumulated depreciation of $0 and $88,319 as of September 30, 2017 and December 31, 2016, respectively	—		173,218
Construction in progress	—		11
Total real estate assets held for sale, net	$	—	$	225,939
Other assets held for sale, net:
Straight-line rent receivables	$	—	$	2,059
Prepaid expenses and other assets	—		454
Deferred lease costs, less accumulated amortization of $0 and $2,825 as of September 30, 2017 and December 31, 2016, respectively	—		7,302
Total other assets held for sale, net	$	—	$	9,815

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10.Stock Based Compensation

The Compensation Committee of Piedmont's Board of Directors has periodically granted deferred stock awards to all of Piedmont's employees and independent directors. Employee awards typically vest ratably over a multi-year period and independent director awards vest over one year. Certain employees' long-term equity incentive program is split equally between the time-vested awards described above and a multi-year performance share program whereby awards may be earned based upon Piedmont's total stockholder return ("TSR") relative to a peer group's TSR. The peer group is predetermined by the Board of Directors. Any shares earned are awarded at the end of the multi-year performance period and vest upon award.

A rollforward of Piedmont's equity based award activity for the nine months endedSeptember 30, 2017 is as follows:

	Shares		Weighted-Average Grant Date Fair Value
Unvested Stock Awards as of December 31, 2016	944,223		$	19.44
Deferred Stock Awards Granted	299,251		$	21.38
Change in Estimated Potential Future Performance Share Awards, net of forfeitures	(7,828	)	$	23.65
Performance Stock Awards Vested	(118,446	)	$	22.00
Deferred Stock Awards Vested	(302,474	)	$	19.35
Deferred Stock Awards Forfeited	(7,200	)	$	19.79
Unvested Stock Awards as of September 30, 2017	807,526		$	21.39

The following table provides additional information regarding stock award activity during the three and nine months endedSeptember 30, 2017 and 2016, respectively (in thousands, except per share amounts):

	Three Months Ended				Nine Months Ended
	September 30, 2017		September 30, 2016		September 30, 2017		September 30, 2016
Weighted-Average Grant Date Fair Value of Deferred Stock Granted During the Period	$	—	$	—	$	21.38	$	19.96
Total Grant Date Fair Value of Deferred Stock Vested During the Period	$	11	$	108	$	5,852	$	4,766
Share-based Liability Awards Paid During the Period(1)	$	—	$	—	$	2,877	$	1,127

⁽¹⁾  Amounts reflect the issuance of performance share awards related to the 2014-16 and 2013-15 Performance Share Plans during the nine months endedSeptember 30, 2017 and 2016, respectively.

20

A detail of Piedmont’s outstanding stock awards as of September 30, 2017 is as follows:

Date of grant	Type of Award	Net Shares Granted (1)	Grant Date Fair Value		Vesting Schedule	Unvested Shares as of September 30, 2017
January 3, 2014	Deferred Stock Award	86,769	$	16.56	Of the shares granted, 20% vested or will vest on January 3, 2015, 2016, 2017, 2018, and 2019, respectively.	35,094
May 1, 2015	Deferred Stock Award	216,837	$	17.59	Of the shares granted, 25% vested on the date of grant, and 25% vested or will vest on May 1, 2016, 2017, and 2018, respectively.	67,114
May 1, 2015	Fiscal Year 2015-2017 Performance Share Program	—	$	18.42	Shares awarded, if any, will vest immediately upon determination of award in 2018.	143,846	(2)
May 24, 2016	Deferred Stock Award	233,011	$	19.91	Of the shares granted, 25% vested on the date of grant, and 25% vested or will vest on May 24, 2017, 2018, and 2019, respectively.	133,092
May 24, 2016	Fiscal Year 2016-2018 Performance Share Program	—	$	23.02	Shares awarded, if any, will vest immediately upon determination of award in 2019.	103,790	(2)
May 18, 2017	Deferred Stock Award-Board of Directors	26,187	$	21.38	Of the shares granted, 100% will vest by May 18, 2018.	26,187
May 18, 2017	Deferred Stock Award	246,740	$	21.38	Of the shares granted, 25% vested on the date of grant, and 25% vested or will vest on May 18, 2018, 2019, and 2020, respectively.	200,899
May 18, 2017	Fiscal Year 2017-2019 Performance Share Program	—	$	30.45	Shares awarded, if any, will vest immediately upon determination of award in 2020.	97,504	(2)
Total						807,526

⁽¹⁾  Amounts reflect the total grant to employees and independent directors, net of shares surrendered upon vesting to satisfy required minimum tax withholding obligations through September 30, 2017.

⁽²⁾  Estimated based on Piedmont's cumulative TSR for the respective performance period through September 30, 2017. Share estimates are subject to change in future periods based upon Piedmont's relative performance compared to its peers' total stockholder return.

During the three months endedSeptember 30, 2017 and 2016, Piedmont recognized approximately $1.3 million and $2.0 million of compensation expense related to stock awards, all of which is related to the amortization of unvested shares. During the nine months endedSeptember 30, 2017 and 2016, Piedmont recognized approximately $7.0 million and $7.7 million of compensation expense related to stock awards, of which $5.2 million and $6.2 million related to the amortization of unvested shares, respectively. During the nine months endedSeptember 30, 2017, a net total of 254,873 shares were issued to employees and independent directors. As of September 30, 2017, approximately $5.1 million of unrecognized compensation cost related to unvested deferred stock awards remained, which Piedmont will record in its consolidated statements of income over a weighted-average vesting period of approximately one year.

11.Earnings Per Share

There are no adjustments to “Net income applicable to Piedmont” for the diluted earnings per share computations. Adjustments to the carrying amount of non-controlling interest as a result of the measurement of a redeemable equity participation do not impact net income or comprehensive income; rather such adjustments are treated as the repurchase of a non-controlling interest.

21

Net income per share-basic is calculated as net income available to common stockholders divided by the weighted average number of common shares outstanding during the period. Net income per share-diluted is calculated as net income available to common stockholders divided by the diluted weighted average number of common shares outstanding during the period, including unvested deferred stock awards. Diluted weighted average number of common shares reflects the potential dilution under the treasury stock method that would occur if the remaining unvested deferred stock awards vested and resulted in additional common shares outstanding. Unvested deferred stock awards which are determined to be anti-dilutive are not included in the calculation of diluted weighted average common shares.

The following table reconciles the denominator for the basic and diluted earnings per share computations shown on the consolidated statements of income for the three and nine months endedSeptember 30, 2017 and 2016, respectively (in thousands):

	Three Months Ended		Nine Months Ended
	September 30, 2017	September 30, 2016	September 30, 2017	September 30, 2016
Weighted-average common shares – basic	145,416	145,231	145,372	145,229
Plus: Incremental weighted-average shares from time-vested deferred and performance stock awards	303	438	308	372
Weighted-average common shares – diluted	145,719	145,669	145,680	145,601
Common stock issued and outstanding as of period end			145,295	145,234

22

12.Guarantor and Non-Guarantor Financial Information

The following condensed consolidating financial information for Piedmont Operating Partnership, L.P. (the "Issuer"), Piedmont Office Realty Trust, Inc. (the "Guarantor"), and the other directly and indirectly owned subsidiaries of the Guarantor (the "Non-Guarantor Subsidiaries") is provided pursuant to the requirements of Rule 3-10 of Regulation S-X regarding financial statements of guarantors and issuers of guaranteed registered securities. The Issuer is a wholly-owned subsidiary of the Guarantor, and all guarantees by the Guarantor of securities issued by the Issuer are full and unconditional. The principal elimination entries relate to investments in subsidiaries and intercompany balances and transactions, including transactions with the Non-Guarantor Subsidiaries.

23

Condensed Consolidated Balance Sheets
As of September 30, 2017
(in thousands)	Issuer		Guarantor			Non-Guarantor Subsidiaries		Eliminations			Consolidated
Assets:
Real estate assets, at cost:
Land	$	43,929	$	—		$	571,005	$	—		$	614,934
Buildings and improvements, less accumulated depreciation	206,700		—			2,516,763		(300		)	2,723,163
Intangible lease assets, less accumulated amortization	317		—			78,383		—			78,700
Construction in progress	797		—			8,160		—			8,957
Total real estate assets	251,743		—			3,174,311		(300		)	3,425,754
Investments in and amounts due from unconsolidated joint ventures	49		—			—		—			49
Cash and cash equivalents	25,884		150			10,074		—			36,108
Tenant and straight-line rent receivables, net	17,556		—			177,855		—			195,411
Advances to affiliates	6,257,405		1,576,739			—		(7,834,144		)	—
Investment in subsidiary	—		3,538,945			177		(3,539,122		)	—
Notes receivable	88,910		—			144,500		(233,410		)	—
Prepaid expenses, restricted cash, escrows, and other assets	4,905		38			25,358		(809		)	29,492
Goodwill	98,918		—			—		—			98,918
Interest rate swaps	34		—			—		—			34
Deferred lease costs, net	13,927		—			260,957		—			274,884
Total assets	$	6,759,331	$	5,115,872		$	3,793,232	$	(11,607,785	)	$	4,060,650
Liabilities:
Debt, net	$	1,511,587	$	—		$	425,409	$	(233,410	)	$	1,703,586
Accounts payable, accrued expenses, and accrued capital expenditures	16,546		652			91,731		(809		)	108,120
Advances from affiliates	790,748		5,226,546			1,915,105		(7,932,399		)	—
Deferred income	3,728		—			26,242		—			29,970
Intangible lease liabilities, net	—		—			41,064		—			41,064
Interest rate swaps	3,915		—			—		—			3,915
Total liabilities	2,326,524		5,227,198			2,499,551		(8,166,618		)	1,886,655
Stockholders’ Equity:
Common stock	—		1,453			—		—			1,453
Additional paid-in capital	3,534,946		3,679,578			1,304		(3,539,122		)	3,676,706
Retained/(cumulative distributions in excess of) earnings	892,461		(3,792,357		)	1,290,513		97,955			(1,511,428		)
Other comprehensive loss	5,400		—			—		—			5,400
Piedmont stockholders’ equity	4,432,807		(111,326		)	1,291,817		(3,441,167		)	2,172,131
Noncontrolling interest	—		—			1,864		—			1,864
Total stockholders’ equity	4,432,807		(111,326		)	1,293,681		(3,441,167		)	2,173,995
Total liabilities and stockholders’ equity	$	6,759,331	$	5,115,872		$	3,793,232	$	(11,607,785	)	$	4,060,650

24

Condensed Consolidated Balance Sheets
As of December 31, 2016
(in thousands)	Issuer		Guarantor			Non-Guarantor Subsidiaries		Eliminations			Consolidated
Assets:
Real estate assets, at cost:
Land	$	46,133	$	—		$	571,005	$	—		$	617,138
Buildings and improvements, less accumulated depreciation	228,194		—			2,526,212		(300		)	2,754,106
Intangible lease assets, less accumulated amortization	725		—			98,970		—			99,695
Construction in progress	145		—			34,669		—			34,814
Real estate assets held for sale, net	—		—			225,939		—			225,939
Total real estate assets	275,197		—			3,456,795		(300		)	3,731,692
Investments in and amounts due from unconsolidated joint ventures	7,360		—			—		—			7,360
Cash and cash equivalents	3,674		150			3,168		—			6,992
Tenant and straight-line rent receivables, net	20,159		—			170,124		—			190,283
Advances to affiliates	6,464,135		1,315,616			—		(7,779,751		)	—
Investment in subsidiary	—		3,630,564			181		(3,630,745		)	—
Notes receivable	88,910		—			95,790		(184,700		)	—
Prepaid expenses, restricted cash, escrows, and other assets	6,189		—			20,121		(1,897		)	24,413
Goodwill	98,918		—			—		—			98,918
Deferred lease costs, net	16,550		—			282,145		—			298,695
Other assets held for sale, net	—		—			9,815		—			9,815
Total assets	$	6,981,092	$	4,946,330		$	4,038,139	$	(11,597,393	)	$	4,368,168
Liabilities:
Debt, net	$	1,701,933	$	—		$	503,242	$	(184,700	)	$	2,020,475
Accounts payable, accrued expenses, and accrued capital expenditures	17,365		31,230			118,712		(1,897		)	165,410
Advances from affiliates	708,340		5,071,521			2,098,146		(7,878,007		)	—
Deferred income	5,206		—			23,200		—			28,406
Intangible lease liabilities, net	—		—			48,005		—			48,005
Interest rate swaps	8,169		—			—		—			8,169
Total liabilities	2,441,013		5,102,751			2,791,305		(8,064,604		)	2,270,465
Stockholders’ Equity:
Common stock	—		1,452			—		—			1,452
Additional paid-in capital	3,626,564		3,676,000			1,309		(3,630,745		)	3,673,128
Retained/(cumulative distributions in excess of) earnings	911,411		(3,833,873		)	1,243,643		97,956			(1,580,863		)
Other comprehensive income	2,104		—			—		—			2,104
Piedmont stockholders’ equity	4,540,079		(156,421		)	1,244,952		(3,532,789		)	2,095,821
Noncontrolling interest	—		—			1,882		—			1,882
Total stockholders’ equity	4,540,079		(156,421		)	1,246,834		(3,532,789		)	2,097,703
Total liabilities and stockholders’ equity	$	6,981,092	$	4,946,330		$	4,038,139	$	(11,597,393	)	$	4,368,168

25

Condensed Consolidated Statements of Income
For the three months ended September 30, 2017
(in thousands)	Issuer			Guarantor			Non-Guarantor Subsidiaries			Eliminations			Consolidated
Revenues:
Rental income	$	10,232		$	—		$	103,544		$	(426	)	$	113,350
Tenant reimbursements	2,376			—			21,562			(142		)	23,796
Property management fee revenue	—			—			4,553			(4,112		)	441
	12,608			—			129,659			(4,680		)	137,587
Expenses:
Property operating costs	5,372			—			53,398			(4,680		)	54,090
Depreciation	3,199			—			26,801			—			30,000
Amortization	740			—			17,383			—			18,123
General and administrative	1,539			77			5,002			—			6,618
	10,850			77			102,584			(4,680		)	108,831
Real estate operating income/(loss)	1,758			(77		)	27,075			—			28,756
Other income (expense):
Interest expense	(13,795		)	—			(6,354		)	3,966			(16,183		)
Other income/(expense)	2,404			—			1,852			(3,966		)	290
Equity in income of unconsolidated joint ventures	3,754			—			—			—			3,754
	(7,637		)	—			(4,502		)	—			(12,139		)
Income/(loss) from continuing operations	(5,879		)	(77		)	22,573			—			16,617
Discontinued operations:
Operating income	—			—			—			—			—
Income from discontinued operations	—			—			—			—			—
Gain/(loss) on sale of real estate assets, net	(4		)	—			109,516			—			109,512
Net income/(loss)	(5,883		)	(77		)	132,089			—			126,129
Plus: Net income applicable to noncontrolling interest	—			—			4			—			4
Net income/(loss) applicable to Piedmont	$	(5,883	)	$	(77	)	$	132,093		$	—		$	126,133

26

Condensed Consolidated Statements of Income
For the three months ended September 30, 2016
(in thousands)	Issuer			Guarantor			Non-Guarantor Subsidiaries			Eliminations			Consolidated
Revenues:
Rental income	$	12,862		$	—		$	101,423		$	(464	)	$	113,821
Tenant reimbursements	3,430			—			20,970			(237		)	24,163
Property management fee revenue	—			—			3,985			(3,484		)	501
	16,292			—			126,378			(4,185		)	138,485
Expenses:
Property operating costs	7,820			—			51,287			(4,240		)	54,867
Depreciation	3,617			—			27,993			—			31,610
Amortization	863			—			17,777			—			18,640
Impairment loss on real estate assets	—			—			22,951			—			22,951
General and administrative	7,187			83			9,016			(8,857		)	7,429
	19,487			83			129,024			(13,097		)	135,497
Real estate operating income/(loss)	(3,195		)	(83		)	(2,646		)	8,912			2,988
Other income (expense):
Interest expense	(11,799		)	—			(6,949		)	3,252			(15,496		)
Other income/(expense)	2,608			—			(76		)	(3,252		)	(720		)
Net recoveries from casualty events	—			—			34			—			34
Equity in income of unconsolidated joint ventures	129			—			—			—			129
	(9,062		)	—			(6,991		)	—			(16,053		)
Income/(loss) from continuing operations	(12,257		)	(83		)	(9,637		)	8,912			(13,065		)
Discontinued operations:
Operating income	—			—			1			—			1
Income from discontinued operations	—			—			1			—			1
Gain/(loss) on sale of real estate assets, net	134			—			(191		)	—			(57		)
Net income/(loss)	(12,123		)	(83		)	(9,827		)	8,912			(13,121		)
Plus: Net income applicable to noncontrolling interest	—			—			14			—			14
Net income/(loss) applicable to Piedmont	$	(12,123	)	$	(83	)	$	(9,813	)	$	8,912		$	(13,107	)

27

Condensed Consolidated Statements of Income
For the nine months ended September 30, 2017
(in thousands)	Issuer			Guarantor			Non-Guarantor Subsidiaries			Eliminations			Consolidated
Revenues:
Rental income	$	32,749		$	—		$	329,669		$	(1,370	)	$	361,048
Tenant reimbursements	8,341			—			64,372			(373		)	72,340
Property management fee revenue	—			—			13,753			(12,412		)	1,341
	41,090			—			407,794			(14,155		)	434,729
Expenses:
Property operating costs	17,027			—			162,381			(14,155		)	165,253
Depreciation	9,943			—			80,884			—			90,827
Amortization	2,399			—			55,453			—			57,852
General and administrative	4,798			261			18,191			—			23,250
	34,167			261			316,909			(14,155		)	337,182
Real estate operating income/(loss)	6,923			(261		)	90,885			—			97,547
Other income (expense):
Interest expense	(43,049		)	—			(20,868		)	11,256			(52,661		)
Other income/(expense)	6,873			—			4,611			(11,256		)	228
Equity in income of unconsolidated joint ventures	3,872			—			—			—			3,872
	(32,304		)	—			(16,257		)	—			(48,561		)
Income/(loss) from continuing operations	(25,381		)	(261		)	74,628			—			48,986
Discontinued operations:
Operating income	—			—			—			—			—
Income from discontinued operations	—			—			—			—			—
Gain on sale of real estate assets, net	6,430			—			109,521			—			115,951
Net income/(loss)	(18,951		)	(261		)	184,149			—			164,937
Plus: Net income applicable to noncontrolling interest	—			—			10			—			10
Net income/(loss) applicable to Piedmont	$	(18,951	)	$	(261	)	$	184,159		$	—		$	164,947

28

Condensed Consolidated Statements of Income
For the nine months ended September 30, 2016
(in thousands)	Issuer			Guarantor			Non-Guarantor Subsidiaries			Eliminations			Consolidated
Revenues:
Rental income	$	42,990		$	—		$	299,319		$	(1,983	)	$	340,326
Tenant reimbursements	10,455			—			59,950			(405		)	70,000
Property management fee revenue	—			—			12,480			(11,002		)	1,478
	53,445			—			371,749			(13,390		)	411,804
Expenses:
Property operating costs	24,583			—			150,369			(13,514		)	161,438
Depreciation	12,993			—			81,955			—			94,948
Amortization	2,854			—			50,994			—			53,848
Impairment loss of real estate assets	8,259			—			25,642			—			33,901
General and administrative	22,802			251			28,881			(28,416		)	23,518
	71,491			251			337,841			(41,930		)	367,653
Real estate operating income/(loss)	(18,046		)	(251		)	33,908			28,540			44,151
Other income (expense):
Interest expense	(36,159		)	—			(20,354		)	8,219			(48,294		)
Other income/(expense)	7,008			282			462			(8,219		)	(467		)
Net recoveries from casualty events	—			—			34			—			34
Equity in income of unconsolidated joint ventures	354			—			—			—			354
	(28,797		)	282			(19,858		)	—			(48,373		)
Net income/(loss)	(46,843		)	31			14,050			28,540			(4,222		)
Discontinued operations:
Operating income	—			—			—			—			—
Income from discontinued operations	—			—			—			—			—
Gain on sale of real estate assets, net	30,096			—			43,662			—			73,758
Net income/(loss)	(16,747		)	31			57,712			28,540			69,536
Plus: Net income applicable to noncontrolling interest	—			—			7			—			7
Net income/(loss) applicable to Piedmont	$	(16,747	)	$	31		$	57,719		$	28,540		$	69,543

29

Condensed Consolidated Statements of Cash Flows
For the nine months ended September 30, 2017
(in thousands)	Issuer			Guarantor			Non-Guarantor Subsidiaries			Eliminations			Consolidated
Net Cash Provided by/(Used in) Operating Activities	$	(15,467	)	$	4,335		$	187,464		$	—		$	176,332
Cash Flows from Investing Activities:
Investment in real estate assets and real estate related intangibles, net of accruals	(793		)	—			(64,614		)	—			(65,407		)
Intercompany note receivable	—			—			(48,710		)	48,710			—
Net sales proceeds from wholly-owned properties	23,028			—			352,171			—			375,199
Net sales proceeds received from unconsolidated joint ventures	12,334			—			—			—			12,334
Investments in unconsolidated joint ventures	(1,162		)	—			—			—			(1,162		)
Deferred lease costs paid	(858		)	—			(18,561		)	—			(19,419		)
Net cash provided by investing activities	32,549			—			220,286			48,710			301,545
Cash Flows from Financing Activities:
Debt issuance costs paid	(102		)	—			1			—			(101		)
Proceeds from debt	147,000			—			—			—			147,000
Repayments of debt	(325,000		)	—			(141,046		)	—			(466,046		)
Intercompany note payable	(14,289		)	—			62,999			(48,710		)	—
Costs of issuance of common stock	—			(97		)	—			—			(97		)
Value of shares withheld to pay tax obligations related to employee stock compensation	—			(3,385		)	—			—			(3,385		)
Repurchases of common stock as part of announced plan	—			(3,895		)	—			—			(3,895		)
(Distributions to)/repayments from affiliates	197,519			125,271			(322,790		)	—			—
Dividends paid and discount on dividend reinvestments	—			(122,229		)	(8		)	—			(122,237		)
Net cash used in financing activities	5,128			(4,335		)	(400,844		)	(48,710		)	(448,761		)
Net increase in cash and cash equivalents	22,210			—			6,906			—			29,116
Cash and cash equivalents, beginning of period	3,674			150			3,168			—			6,992
Cash and cash equivalents, end of period	$	25,884		$	150		$	10,074		$	—		$	36,108

30

Condensed Consolidated Statements of Cash Flows
For the nine months ended September 30, 2016
(in thousands)	Issuer			Guarantor			Non-Guarantor Subsidiaries			Eliminations			Consolidated
Net Cash Provided by/(Used in) Operating Activities	$	(18,977	)	$	4,121		$	158,352		$	28,540		$	172,036
Cash Flows from Investing Activities:
Investment in real estate assets, consolidated joint venture, and real estate related intangibles, net of accruals	(24,255		)	—			(296,884		)	—			(321,139		)
Intercompany note receivable	440			—			(71,900		)	71,460			—
Net sales proceeds from wholly-owned properties	187,192			—			117,710			—			304,902
Deferred lease costs paid	(2,021		)	—			(13,324		)	—			(15,345		)
Net cash provided by/(used in) investing activities	161,356			—			(264,398		)	71,460			(31,582		)
Cash Flows from Financing Activities:
Debt issuance costs paid	(212		)	—			—			—			(212		)
Proceeds from debt	552,000			—			—			—			552,000
Repayments of debt	(421,000		)	—			(168,532		)	—			(589,532		)
Intercompany note payable	(9,600		)	—			81,060			(71,460		)	—
Costs of issuance of common stock	—			(239		)	—			—			(239		)
Value of shares withheld to pay tax obligations related to employee stock compensation	—			(2,328		)	—			—			(2,328		)
Repurchases of common stock as part of announced plan	—			(7,943		)	—			—			(7,943		)
(Distributions to)/repayments from affiliates	(262,150		)	97,990			192,700			(28,540		)	—
Dividends paid and discount on dividend reinvestments	—			(91,601		)	(8		)	—			(91,609		)
Net cash provided by/(used in) financing activities	(140,962		)	(4,121		)	105,220			(100,000		)	(139,863		)
Net increase/(decrease) in cash and cash equivalents	1,417			—			(826		)	—			591
Cash and cash equivalents, beginning of period	2,174			150			3,117			—			5,441
Cash and cash equivalents, end of period	$	3,591		$	150		$	2,291		$	—		$	6,032

13.Subsequent Events

Fourth Quarter Dividend Declaration

On October 31, 2017, the Board of Directors of Piedmont declared dividends for the fourth quarter 2017 in the amount of $0.21 per common share outstanding to stockholders of record as of the close of business on November 24, 2017. Such dividends are to be paid on January 4, 2018.

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

The following discussion and analysis should be read in conjunction with the accompanying consolidated financial statements and notes thereto of Piedmont Office Realty Trust, Inc. (“Piedmont,” "we," "our," or "us"). See also “Cautionary Note Regarding Forward-Looking Statements” preceding Part I, as well as the consolidated financial statements and accompanying notes thereto and Management’s Discussion and Analysis of Financial Condition and Results of Operations included in our Amended Annual Report on Form 10-K/A for the year ended December 31, 2016.

Liquidity and Capital Resources

We intend to use cash on hand, cash flows generated from the operation of our properties, proceeds from our $500 Million Unsecured 2015 Line of Credit, and proceeds from selective property dispositions as our primary sources of immediate liquidity. During the quarter ended September 30, 2017, we sold the Two Independence Square building in Washington, D.C., which generated net sales proceeds of approximately $352 million. We used the proceeds to pay off the balance outstanding on our $500 Million Unsecured 2015 Line of Credit, as well as to repay the $140 Million WDC Fixed-Rate Loans. As a result, as of the date of this filing, in addition to approximately $36 million cash on hand, we have the full capacity under our $500 million line of credit available. From time to time, we may also seek additional secured or unsecured borrowings from third-party lenders or issue securities as additional sources of capital. The availability and attractiveness of terms for these additional sources of capital are highly dependent on market conditions.

Our most consistent use of capital has historically been, and we believe will continue to be, to fund capital expenditures for our existing portfolio of properties. During the nine months endedSeptember 30, 2017 and 2016 we incurred the following types of capital expenditures (in thousands):

	Nine Months Ended
	September 30, 2017		September 30, 2016
Capital expenditures for new development	$	4,794	$	13,116
Capital expenditures for redevelopment/renovations	714		7,344
Other capital expenditures, including tenant improvements	59,899		67,931
Total capital expenditures(1)	$	65,407	$	88,391

⁽¹⁾  Of the total amounts paid, approximately $0.2 million and $5.1 million relates to soft costs such as capitalized interest, payroll, and other general and administrative expenses for the nine months endedSeptember 30, 2017 and 2016, respectively.

"Capital expenditures for new development" relate to new office development projects. Expenditures during the nine months ended September 30, 2017 pertained to 500 TownPark, a now-complete, 134,000 square foot, 90% leased, four-story office building located adjacent to our existing 400 TownPark building in Lake Mary, Florida, as well as initial pre-construction costs for three separate land parcels in our portfolio. During the nine months ended September 30, 2016, our active development projects consisted of Enclave Place, our now-complete, 301,000 square foot, 11-story office tower in Houston, Texas, and the previously mentioned 500 TownPark building.

"Capital expenditures for redevelopment/renovations" during both the nine months ended September 30, 2017 and 2016 related to a now-complete redevelopment project that converted our 3100 Clarendon Boulevard building in Arlington, Virginia from governmental use into Class A private sector office space.

"Other capital expenditures" include all other capital expenditures during the period and are typically comprised of tenant and building improvements necessary to lease, maintain, or provide enhancements to our existing portfolio of office properties.

We classify our tenant and building improvements into two categories: (i) improvements which maintain the building's existing asset value and its revenue generating capacity (“non-incremental capital expenditures”) and (ii) improvements which incrementally enhance the building's asset value by expanding its revenue generating capacity (“incremental capital expenditures”). Commitments for funding non-incremental capital expenditures for tenant improvements over the next five years related to our existing lease portfolio total approximately $32.1 million. The timing of the funding of these commitments is largely dependent upon tenant requests for reimbursement; however, we anticipate that a significant portion of these improvement allowances may be requested over the next three years based on when the underlying leases commence. In some instances, these obligations may expire with

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the respective lease without further recourse to us. Additionally, commitments for incremental capital expenditures for tenant improvements associated with executed leases totaled approximately $15.2 million as of September 30, 2017.

In addition to the amounts described above to which we have already committed as a part of executed leases, we anticipate continuing to incur similar market-based tenant improvement allowances and leasing commissions in conjunction with procuring future leases for our existing portfolio of properties, including recently completed development and redevelopment projects. Given that our operating model frequently results in leases for large blocks of space to credit-worthy tenants, our leasing success can result in significant capital outlays. For example, for leases executed during the nine months endedSeptember 30, 2017, we committed to spend approximately $3.65 and $1.47 per square foot per year of lease term for tenant improvement allowances and leasing commissions, respectively, and for those executed during the nine months endedSeptember 30, 2016, we committed to spend approximately $3.68 and $1.54 per square foot per year of lease term for tenant improvement allowances and leasing commissions, respectively. Both the timing and magnitude of expenditures related to future leasing activity are highly dependent on the competitive market conditions of the particular office market at the time a given lease is negotiated and signed.

There are several other uses of capital that may arise as part of our ongoing operations. Although we currently have no debt maturing until May of 2018, on a longer term basis we expect to use capital to make repayments of our line of credit or other maturing debt obligations as they become due. Additionally, subject to the identification and availability of attractive investment opportunities within our targeted sub-markets and our ability to consummate such acquisitions on satisfactory terms, acquiring new assets could also be a significant use of capital. Finally, our Board of Directors has authorized a stock repurchase program, pursuant to which we may use capital resources to repurchase shares of our common stock from time to time.

The amount and form of payment (cash or stock issuance) of future dividends to be paid to our stockholders will continue to be largely dependent upon (i) the amount of cash generated from our operating activities; (ii) our expectations of future cash flows; (iii) our determination of near-term cash needs for debt repayments, development projects, and selective acquisitions of new properties; (iv) the timing of significant expenditures for tenant improvements, building redevelopment projects, and general property capital improvements; (v) long-term payout ratios for comparable companies; (vi) our ability to continue to access additional sources of capital, including potential sales of our properties; and (vii) the amount required to be distributed to maintain our tax status as a REIT. Additionally, given relatively attractive real estate values in recent years, we were a net seller of assets during 2016, and expect to continue to be a net seller of assets in the current year, which may result in large one-time, tax-basis capital gains that cannot be offset by tax-basis capital losses or by tax deferred structures, such as Section 1031 exchanges. As a result, we may make special dividend distributions in addition to our normal quarterly distributions, if such distributions are required to maintain our tax status as a REIT. With the fluctuating nature of cash flows and expenditures, we may periodically borrow funds on a short-term basis to cover timing differences in cash receipts and cash disbursements.

Results of Operations

Overview

We recognized net income applicable to common stockholders of $0.87 per fully diluted share for the three months endedSeptember 30, 2017, as compared with a net loss of ($0.09) per fully diluted share for the three months ended September 30, 2016. The increase was primarily due to the sale of the Two Independence Square building, generating approximately $109.5 million, or $0.75 per diluted share, in gain on sale of real estate assets during the current period. The remainder of the increase is primarily attributable to the non-recurrence of impairment charges which arose in the prior period, and the recognition of a gain on the sale of our last unconsolidated joint venture property in the current period.

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Comparison of the three months endedSeptember 30, 2017 versus the three months endedSeptember 30, 2016

Income from Continuing Operations

The following table sets forth selected data from our consolidated statements of income for the three months endedSeptember 30, 2017 and 2016, respectively, as well as each balance as a percentage of total revenues for the same periods presented (dollars in millions):

	September 30, 2017			% of Revenues		September 30, 2016			% of Revenues		Variance
Revenue:
Rental income	$	113.4				$	113.8				$	(0.4	)
Tenant reimbursements	23.8					24.2					(0.4		)
Property management fee revenue	0.4					0.5					(0.1		)
Total revenues	137.6			100	%	138.5			100	%	(0.9		)
Expense:
Property operating costs	54.1			39	%	54.9			40	%	(0.8		)
Depreciation	30.0			22	%	31.6			23	%	(1.6		)
Amortization	18.1			13	%	18.6			13	%	(0.5		)
Impairment loss on real estate assets	—			—	%	23.0			17	%	(23.0		)
General and administrative	6.6			5	%	7.4			5	%	(0.8		)
Real estate operating income	28.8			21	%	3.0			2	%	25.8
Other income (expense):
Interest expense	(16.2		)	12	%	(15.5		)	11	%	(0.7		)
Other income/(expense)	0.3			—	%	(0.7		)	—	%	1.0
Equity in income of unconsolidated joint ventures	3.7			3	%	0.1			—	%	3.6
Income/(loss) from continuing operations	$	16.6		12	%	$	(13.1	)	9	%	$	29.7
Gain/(loss) on sale of real estate assets, net	$	109.5				$	(0.1	)			$	109.6

Revenue

Rental income decreased approximately $0.4 million for the three months endedSeptember 30, 2017, as compared to the same period in the prior year. Net property sales activity since July 1, 2016 contributed approximately $2.7 million of the decrease. Net leasing activity commencing during 2016 and 2017 across our portfolio, including our recently constructed 500 TownPark building which became fully operational in 2017, largely offset the decrease.

Tenant reimbursements decreased approximately $0.4 million for the three months endedSeptember 30, 2017 as compared to the same period in the prior year. The decrease is primarily attributable to net property sales activity since July 1, 2016.

Expense

Property operating costs decreased approximately $0.8 million for the three months endedSeptember 30, 2017 compared to the same period in the prior year. Net property sales activity since July 1, 2016 contributed approximately $2.0 million of the decrease, offset by higher overall recoverable costs compared to the prior period in our existing portfolio.

Depreciation expense decreased approximately $1.6 million for the three months endedSeptember 30, 2017 compared to the same period in the prior year. Net property sales activity since July 1, 2016 contributed approximately $2.2 million of the decrease, primarily driven by the sale of our Two Independence Square building. This decrease was partially offset by depreciation on additional building and tenant improvements placed in service during the same period.

Amortization expense decreased approximately $0.5 million for the three months endedSeptember 30, 2017 compared to the same period in the prior year. We recognized approximately $2.6 million less amortization expense as compared to the prior period as a result of certain lease intangible assets at our existing properties becoming fully amortized subsequent to July 1, 2016. However,

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this decrease was largely offset by additional amortization of intangible lease assets recognized as part of acquiring new properties during 2016.

During the three months endedSeptember 30, 2016, we recognized non-recurring impairment charges related to our 9200 and 9211 Corporate Boulevard buildings in Rockville, Maryland totaling approximately $23.0 million (see Note 7).

General and administrative expenses decreased approximately $0.8 million for the three months endedSeptember 30, 2017 compared to the same period in the prior year, primarily due to decreased accruals for potential performance-based stock compensation.

Other Income (Expense)

Interest expense increased approximately $0.7 million for the three months endedSeptember 30, 2017 as compared to the same period in the prior year. Approximately $1.4 million of the increase is due to placing our development projects into service in 2017, which causes associated interest to be expensed rather than be capitalized as part of the development. A net decrease in our average debt outstanding for the three months ended September 30, 2017 as compared to the prior period, partially offset this increase.

Other income/(expense) increased approximately $1.0 million for the three months endedSeptember 30, 2017 as compared to the same period in the prior year due to the non-recurrence of costs incurred in the prior period associated with the acquisition of new properties during the three months ended September 30, 2016.

Equity in income of unconsolidated joint ventures increased approximately $3.6 million for the three months endedSeptember 30, 2017 as compared to the same period in the prior year. The increase is due primarily to the recognition of our portion of the gain on the sale of our last unconsolidated joint venture property, the 8560 Upland Drive building in Denver, Colorado.

Gain on sale of real estate assets, net, during the current year represents the gain recognized on the sale of the Two Independence Square building during the three months ended September 30, 2017.

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Comparison of the accompanying consolidated statements of income for the nine months endedSeptember 30, 2017 versus the nine months endedSeptember 30, 2016

Income from Continuing Operations

The following table sets forth selected data from our consolidated statements of income for the nine months endedSeptember 30, 2017 and 2016, respectively, as well as each balance as a percentage of total revenues for the same period presented (dollars in millions):

	September 30, 2017			% of Revenues		September 30, 2016			% of Revenues		Variance
Revenue:
Rental income	$	361.0				$	340.3				$	20.7
Tenant reimbursements	72.3					70.0					2.3
Property management fee revenue	1.4					1.5					(0.1		)
Total revenues	434.7			100	%	411.8			100	%	22.9
Expense:
Property operating costs	165.3			39	%	161.4			39	%	3.9
Depreciation	90.8			21	%	94.9			23	%	(4.1		)
Amortization	57.8			13	%	53.9			13	%	3.9
Impairment loss on real estate assets	—			—	%	33.9			8	%	(33.9		)
General and administrative	23.3			5	%	23.5			6	%	(0.2		)
Real estate operating income	97.5			22	%	44.2			11	%	53.3
Other income (expense):
Interest expense	(52.6		)	12	%	(48.3		)	12	%	(4.3		)
Other income/(expense)	0.2			—	%	(0.5		)	—	%	0.7
Equity in income of unconsolidated joint ventures	3.9			1	%	0.4			—	%	3.5
Income/(loss) from continuing operations	$	49.0		11	%	$	(4.2	)	1	%	$	53.2
Gain on sale of real estate assets, net	$	116.0				$	73.8				$	42.2

Revenue

Rental income increased approximately $20.7 million for the nine months endedSeptember 30, 2017 as compared to the same period in the prior year. The increase is primarily attributable to new leases commencing during 2016 and 2017 across our portfolio, partially offset by net property sales activity since January 1, 2016.

Tenant reimbursements increased approximately $2.3 million for the nine months endedSeptember 30, 2017 as compared to the same period in the prior year. The variance was primarily attributable to increased average office occupancy and the resulting increase in recoverable operating expenses. In addition, tenant reimbursements for the nine months ended September 30, 2017 includes the non-recurring settlement receipt of approximately $0.6 million of prior period reimbursements as a result of a favorable court ruling on a tenant dispute.

Expense

Property operating costs increased approximately $3.9 million for the nine months endedSeptember 30, 2017 as compared to the same period in the prior year, primarily due to increased average office occupancy and the resulting increase in recoverable property tax expense ($3.2 million), repairs and maintenance ($1.0 million) and tenant requested services ($0.3 million). These increases were partially offset by a decrease in non-recoverable operating expenses of $0.8 million across our portfolio of properties as compared to the prior period.

Depreciation expense decreased approximately $4.1 million for the nine months endedSeptember 30, 2017 as compared to the same period in the prior year. Approximately $7.4 million of the decrease was attributable to net property sales activity during 2016 and 2017, of which $5.8 million is attributable to the sale of the Two Independence Square building in July 2017. These decreases were offset by depreciation on additional building and tenant improvements placed in service subsequent to January 1, 2016 across our portfolio of properties, including two development projects and one re-development project placed in service in January 2017.

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Amortization expense increased approximately $3.9 million for the nine months endedSeptember 30, 2017 as compared to the same period in the prior year. Of the total variance, approximately $10.4 million of expense is due to additional amortization of intangible lease assets recognized as part of acquiring new properties during 2016. These increases were offset by certain lease intangible assets at our existing properties becoming either fully amortized subsequent to January 1, 2016, or sold as part of our net disposition activity.

During the nine months endedSeptember 30, 2016, we recognized non-recurring impairment charges related to our 150 West Jefferson building located in Detroit, Michigan, and our 9200, 9211, and 9221 Corporate Boulevard buildings totaling approximately $33.9 million (see Note 7).

General and administrative expenses decreased approximately $0.2 million for the nine months endedSeptember 30, 2017 as compared to the same period in the prior year, primarily due to decreased accruals for potential performance-based stock compensation, partially offset by higher legal and stockholder communication costs.

Other Income (Expense)

Interest expense increased approximately $4.3 million for the nine months endedSeptember 30, 2017 as compared to the same period in the prior year. Approximately $3.2 million of the increase is due to placing our development projects into service in 2017, which caused associated interest to be expensed rather than be capitalized as part of the development. The remainder of the variance is due to a net increase in our average debt outstanding for the nine months ended September 30, 2017 as compared to the prior period.

Other income/(expense) increased approximately $0.7 million for the nine months endedSeptember 30, 2017 as compared to the same period in the prior year due to incurring costs associated with the acquisition of new properties during 2016, which did not occur in the current year.

Equity in income of unconsolidated joint ventures increased approximately $3.5 million for the nine months endedSeptember 30, 2017 as compared to the same period in the prior year. The increase is due to the recognition of our portion of the gain on the sale of our last unconsolidated joint venture property, the 8560 Upland Drive building.

Gain on sale of real estate assets, net, during the nine months ended September 30, 2017 represents the gain recognized on the sale of the Sarasota Commerce Center II in Sarasota, Florida, and the Two Independence Square building during the nine months ended September 30, 2017. For the nine months ended September 30, 2016, gain on sale of real estate assets, net, is comprised of the following sold properties: 1055 East Colorado Boulevard in Pasadena, California; Fairway Center II in Brea, California; and 1901 Main Street in Irvine, California.

Funds From Operations (“FFO”), Core FFO, and Adjusted Funds from Operations (“AFFO”)

Net income calculated in accordance with U.S. generally accepted accounting principles ("GAAP") is the starting point for calculating FFO, Core FFO, and AFFO. These metrics are non-GAAP financial measures and should not be viewed as an alternative measurement of our operating performance to net income. Management believes that accounting for real estate assets in accordance with GAAP implicitly assumes that the value of real estate assets diminishes predictably over time. Since real estate values have historically risen or fallen with market conditions, many industry investors and analysts have considered the presentation of operating results for real estate companies that use historical cost accounting to be insufficient by themselves. As a result, we believe that the additive use of FFO, Core FFO, and AFFO, together with the required GAAP presentation, provides a more complete understanding of our performance relative to our competitors and a more informed and appropriate basis on which to make decisions involving operating, financing, and investing activities.

We calculate FFO in accordance with the current National Association of Real Estate Investment Trusts ("NAREIT") definition. NAREIT currently defines FFO as follows: Net income (computed in accordance with GAAP), excluding gains or losses from sales of property and impairment charges (including our proportionate share of any impairment charges and/or gains or losses from sales of property related to investments in unconsolidated joint ventures), plus depreciation and amortization on real estate assets (including our proportionate share of depreciation and amortization related to investments in unconsolidated joint ventures). Other REITs may not define FFO in accordance with the NAREIT definition, or may interpret the current NAREIT definition differently than we do; therefore, our computation of FFO may not be comparable to such other REITs.

We calculate Core FFO by starting with FFO, as defined by NAREIT, and adjusting for gains or losses on the extinguishment of swaps and/or debt, acquisition-related expenses, and any significant non-recurring items. Core FFO is a non-GAAP financial measure and should not be viewed as an alternative to net income calculated in accordance with GAAP as a measurement of our

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operating performance. We believe that Core FFO is helpful to investors as a supplemental performance measure because it excludes the effects of certain items which can create significant earnings volatility, but which do not directly relate to our core recurring business operations. As a result, we believe that Core FFO can help facilitate comparisons of operating performance between periods and provides a more meaningful predictor of future earnings potential. Other REITs may not define Core FFO in the same manner as us; therefore, our computation of Core FFO may not be comparable to that of other REITs.

We calculate AFFO by starting with Core FFO and adjusting for non-incremental capital expenditures and acquisition-related costs and then adding back non-cash items including: non-real estate depreciation, straight-lined rents and fair value lease adjustments, non-cash components of interest expense and compensation expense, and by making similar adjustments for unconsolidated partnerships and joint ventures. AFFO is a non-GAAP financial measure and should not be viewed as an alternative to net income calculated in accordance with GAAP as a measurement of our operating performance. We believe that AFFO is helpful to investors as a meaningful supplemental comparative performance measure of our ability to make incremental capital investments. Other REITs may not define AFFO in the same manner as us; therefore, our computation of AFFO may not be comparable to that of other REITs.

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Reconciliations of net income to FFO, Core FFO, and AFFO are presented below (in thousands except per share amounts):

	Three Months Ended												Nine Months Ended
	September 30, 2017			Per Share(1)			September 30, 2016			Per Share(1)			September 30, 2017			Per Share(1)			September 30, 2016			Per Share(1)
GAAP net income applicable to common stock	$	126,133		$	0.87		$	(13,107	)	$	(0.09	)	$	164,947		$	1.13		$	69,543		$	0.48
Depreciation of real estate assets(2)	29,774			0.20			31,451			0.21			90,335			0.62			94,532			0.65
Amortization of lease-related costs(2)	18,107			0.12			18,640			0.13			57,828			0.40			53,880			0.37
Impairment loss on real estate assets	—			—			22,951			0.16			—			—			33,901			0.23
(Gain)/loss on sale - wholly-owned properties, net	(109,512		)	(0.75		)	57			—			(115,951		)	(0.80		)	(73,758		)	(0.51		)
Gain on sale- unconsolidated partnership	(3,683		)	(0.02		)	—			—			(3,683		)	(0.02		)	—			—
NAREIT Funds From Operations applicable to common stock	$	60,819		$	0.42		$	59,992		$	0.41		$	193,476		$	1.33		$	178,098		$	1.22
Adjustments:
Acquisition costs	—			—			955			0.01			6			—			972			0.01
Net recoveries from casualty events	—			—			(34		)	—			—			—			(34		)	—
Core Funds From Operations applicable to common stock	$	60,819		$	0.42		$	60,913		$	0.42		$	193,482		$	1.33		$	179,036		$	1.23
Adjustments:
Amortization of debt issuance costs, fair market value adjustments on notes payable, and discount on debt	634						653						1,892						1,943
Depreciation of non real estate assets	218						216						597						595
Straight-line effects of lease revenue (2)	(3,602		)				(4,140		)				(15,939		)				(15,115		)
Stock-based and other non-cash compensation	1,250						1,931						4,202						5,336
Net effect of amortization of above and below-market in-place lease intangibles	(1,720		)				(1,152		)				(4,890		)				(3,680		)
Acquisition costs	—						(955		)				(6		)				(972		)
Non-incremental capital expenditures (3)	(5,229		)				(6,982		)				(21,974		)				(23,433		)
Adjusted Funds From Operations applicable to common stock	$	52,370					$	50,484					$	157,364					$	143,710
Weighted-average shares outstanding – diluted	145,719						145,669						145,680						145,601

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⁽¹⁾  Based on weighted average shares outstanding – diluted.

⁽²⁾  Includes amounts for wholly-owned properties, as well as such amounts for our proportionate ownership in unconsolidated joint ventures.

⁽³⁾  We define non-incremental capital expenditures as capital expenditures of a recurring nature related to tenant improvements, leasing commissions, and building capital that do not incrementally enhance the underlying assets' income generating capacity. Tenant improvements, leasing commissions, building capital and deferred lease incentives incurred to lease space that was vacant at acquisition, leasing costs for spaces vacant for greater than one year, leasing costs for spaces at newly acquired properties for which in-place leases expire shortly after acquisition, improvements associated with the expansion of a building, and renovations that either enhance the rental rates of a building or change the property's underlying classification, such as from a Class B to a Class A property, are excluded from this measure.

Property and Same Store Net Operating Income

Property Net Operating Income ("Property NOI") is a non-GAAP measure which we use to assess our operating results. We calculate Property NOI beginning with Net income (computed in accordance with GAAP) before interest, taxes, depreciation and amortization and incrementally removing any impairment losses, gains or losses from sales of property and other significant infrequent items that create volatility within our earnings and make it difficult to determine the earnings generated by our core ongoing business. Furthermore, we adjust for general and administrative expense, income associated with property management performed by us for other organizations, and other income or expense items such as interest income from loan investments or costs from the pursuit of non-consummated transactions. For Property NOI (cash basis), the effects of straight-lined rents and fair value lease revenue are also eliminated; while such effects are not adjusted in calculating Property NOI (accrual basis). Property NOI is a non-GAAP financial measure and should not be viewed as an alternative to net income calculated in accordance with GAAP as a measurement of our operating performance. We believe that Property NOI, on either a cash or accrual basis, is helpful to investors as a supplemental comparative performance measure of income generated by our properties alone without our administrative overhead. Other REITs may not define Property NOI in the same manner as we do; therefore, our computation of Property NOI may not be comparable to that of other REITs.

We calculate Same Store Net Operating Income ("Same Store NOI") as Property NOI applicable to the properties owned or placed in service during the entire span of the current and prior year reporting periods. Same Store NOI also excludes amounts applicable to unconsolidated joint venture assets. Same Store NOI is a non-GAAP financial measure and should not be viewed as an alternative to net income calculated in accordance with GAAP as a measurement of our operating performance. We believe that Same Store NOI, on either a cash or accrual basis is helpful to investors as a supplemental comparative performance measure of the income generated from the same group of properties from one period to the next. Other REITs may not define Same Store NOI in the same manner as we do; therefore, our computation of Same Store NOI may not be comparable to that of other REITs.

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The following table sets forth a reconciliation from net income calculated in accordance with GAAP to Property NOI, on both a cash and accrual basis, and Same Store NOI, on both a cash and accrual basis, for the three months endedSeptember 30, 2017 and 2016, respectively (in thousands):

	Cash Basis						Accrual Basis
	Three Months Ended						Three Months Ended
	September 30, 2017			September 30, 2016			September 30, 2017			September 30, 2016
Net income/(loss) applicable to Piedmont (GAAP basis)	$	126,133		$	(13,107	)	$	126,133		$	(13,107	)
Net income applicable to noncontrolling interest	(4		)	(14		)	(4		)	(14		)
Interest expense	16,183			15,496			16,183			15,496
Depreciation (1)	29,993			31,667			29,993			31,667
Amortization (1)	18,107			18,640			18,107			18,640
Acquisition costs	—			955			—			955
Impairment loss on real estate assets (1)	—			22,951			—			22,951
Net (recoveries)/loss from casualty events	25			(34		)	25			(34		)
(Gain)/loss on sale of real estate assets, net (1)	(113,195		)	57			(113,195		)	57
General & administrative expenses(1)	6,631			7,437			6,631			7,437
Management fee revenue	(241		)	(295		)	(241		)	(295		)
Other income(1)	(315		)	(235		)	(315		)	(235		)
Straight-line rent effects of lease revenue(1)	(3,602		)	(4,140		)
Amortization of lease-related intangibles(1)	(1,720		)	(1,152		)
Property NOI	$	77,995		$	78,226		$	83,317		$	83,518
Net operating income from:
Acquisitions(2)	(4,584		)	(2,485		)	(7,512		)	(2,779		)
Dispositions(3)	(9		)	(5,724		)	(12		)	(5,905		)
Other investments(4)	(99		)	(332		)	(764		)	(651		)
Same Store NOI	$	73,303		$	69,685		$	75,029		$	74,183
Change period over period in Same Store NOI	5.2		%	N/A			1.1		%	N/A

⁽¹⁾  Includes amounts applicable to consolidated properties and our proportionate share of amounts applicable to unconsolidated joint ventures.

⁽²⁾  Acquisitions consist of CNL Center I and CNL Center II in Orlando, Florida, purchased on August 1, 2016; One Wayside Road in Burlington, Massachusetts, purchased on August 10, 2016; Galleria 200 in Atlanta, Georgia, purchased on October 7, 2016; and 750 West John Carpenter Freeway in Irving, Texas, purchased on November 30, 2016.

⁽³⁾  Dispositions consist of 1055 East Colorado Boulevard in Pasadena, California, sold on April 21, 2016; Fairway Center II in Brea, California, sold on April 28, 2016; 1901 Main Street in Irvine, California, sold on May 2, 2016; 9221 Corporate Boulevard in Rockville, Maryland, sold on July 27, 2016; 150 West Jefferson in Detroit, Michigan, sold on July 29, 2016; 9200 and 9211 Corporate Boulevard in Rockville, Maryland, sold on September 28, 2016; 11695 Johns Creek Parkway in Johns Creek, Georgia, sold on December 22, 2016; Braker Pointe III in Austin, Texas, sold on December 29, 2016; Sarasota Commerce Center II in Sarasota, Florida, sold on June 16, 2017; and Two Independence Square in Washington, D.C., sold on July 5, 2017.

⁽⁴⁾  Other investments consist of our investments in unconsolidated joint ventures, active redevelopment and development projects, land, and recently completed redevelopment and development projects for which some portion of operating expenses were capitalized during the current and/or prior year reporting periods. The operating results from 3100 Clarendon Boulevard in Arlington, Virginia, Enclave Place in Houston, Texas, and 500 TownPark in Lake Mary, Florida, are included in this line item.

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The following table sets forth a reconciliation from net income calculated in accordance with GAAP to Property NOI, on both a cash and accrual basis, and Same Store NOI, on both a cash and accrual basis, for the nine months endedSeptember 30, 2017 and 2016, respectively (in thousands):

	Cash Basis						Accrual Basis
	Nine Months Ended						Nine Months Ended
	September 30, 2017			September 30, 2016			September 30, 2017			September 30, 2016
Net income applicable to Piedmont (GAAP basis)	$	164,947		$	69,543		$	164,947		$	69,543
Net income applicable to noncontrolling interest	(10		)	(7		)	(10		)	(7		)
Interest expense	52,661			48,294			52,661			48,294
Depreciation (1)	90,933			95,127			90,933			95,127
Amortization (1)	57,828			53,880			57,828			53,880
Acquisition costs	6			972			6			972
Impairment loss on real estate assets (1)	—			33,901			—			33,901
Net (recoveries)/loss from casualty events	57			(34		)	57			(34		)
Gain on sale of real estate assets, net (1)	(119,634		)	(73,758		)	(119,634		)	(73,758		)
General & administrative expenses(1)	23,291			23,565			23,291			23,565
Management fee revenue	(724		)	(810		)	(724		)	(810		)
Other (income)/expense(1)	(291		)	1			(291		)	1
Straight-line rent effects of lease revenue(1)	(15,939		)	(15,115		)
Amortization of lease-related intangibles(1)	(4,890		)	(3,680		)
Property NOI	$	248,235		$	231,879		$	269,064		$	250,674
Net operating loss/(income) from:
Acquisitions(2)	(13,201		)	(2,485		)	(22,160		)	(2,779		)
Dispositions(3)	(11,403		)	(27,023		)	(11,462		)	(28,042		)
Other investments(4)	521			(362		)	(1,852		)	(874		)
Same Store NOI	$	224,152		$	202,009		$	233,590		$	218,979
Change period over period in Same Store NOI	11.0		%	N/A			6.7		%	N/A

⁽¹⁾  Includes amounts applicable to consolidated properties and our proportionate share of amounts applicable to unconsolidated joint ventures.

⁽²⁾  Acquisitions consist of CNL Center I and CNL Center II in Orlando, Florida, purchased on August 1, 2016; One Wayside Road in Burlington, Massachusetts, purchased on August 10, 2016; Galleria 200 in Atlanta, Georgia, purchased on October 7, 2016; and 750 West John Carpenter Freeway in Irving, Texas, purchased on November 30, 2016.

⁽³⁾  Dispositions consist of 1055 East Colorado Boulevard in Pasadena, California, sold on April 21, 2016; Fairway Center II in Brea, California, sold on April 28, 2016; 1901 Main Street in Irvine, California, sold on May 2, 2016; 9221 Corporate Boulevard in Rockville, Maryland, sold on July 27, 2016; 150 West Jefferson in Detroit, Michigan, sold on July 29, 2016; 9200 and 9211 Corporate Boulevard in Rockville, Maryland, sold on September 28, 2016; 11695 Johns Creek Parkway in Johns Creek, Georgia, sold on December 22, 2016; Braker Pointe III in Austin, Texas, sold on December 29, 2016; Sarasota Commerce Center II in Sarasota, Florida, sold on June 16, 2017; and Two Independence Square in Washington, D.C., sold on July 5, 2017.

⁽⁴⁾  Other investments consist of our investments in unconsolidated joint ventures, active redevelopment and development projects, land, and recently completed redevelopment and development projects for which some portion of operating expenses were capitalized during the current and/or prior year reporting periods. The operating results from 3100 Clarendon Boulevard in Arlington, Virginia, Enclave Place in Houston, Texas, and 500 TownPark in Lake Mary, Florida, are included in this line item.

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Overview

Our portfolio is a diverse geographical portfolio primarily located in select sub-markets within eight major office markets located in the Eastern-half of the U.S. We typically lease space to large, credit-worthy corporate or governmental tenants on a long-term basis. Our average lease is approximately 21,000 square feet with 6.5 years of lease term remaining as of September 30, 2017. As a result, leased percentage, as well as rent roll ups and roll downs, which we experience as a result of re-leasing, can fluctuate widely between markets, between buildings, and between tenants within a given market depending on when a particular lease is scheduled to expire.

Leased Percentage

Our current in-service portfolio of 66 office properties was 89.2% leased as of September 30, 2017, down from 93.4% leased as of September 30, 2016, due primarily to placing three development/re-development properties totaling 700,000 square feet in service during the current year, and the expiration of two tenant leases and sale of a 100% leased asset in our Washington, D.C. portfolio during the three months ended September 30, 2017, as well as net leasing activity. As of September 30, 2017, scheduled lease expirations for the portfolio as a whole for the remainder of 2017 and 2018 were 0.6% and 7.9%, respectively, of our ALR. To the extent new leases for currently vacant space outweigh or fall short of scheduled expirations, such leases would increase or decrease our leased percentage, respectively. Our leased percentage may also fluctuate from the impact of various occupancy levels in our net acquisition and disposition activity.

Impact of Downtime, Abatement Periods, and Rental Rate Changes

Commencement of new leases typically occurs 6-18 months after the lease execution date, after refurbishment of the space is completed. The downtime between a lease expiration and the new lease's commencement can negatively impact Property NOI and Same Store NOI comparisons (both accrual and cash basis). In addition, office leases, both new and lease renewals, often contain upfront rental and/or operating expense abatement periods which delay the cash flow benefits of the lease even after the new lease or renewal has commenced and will continue to negatively impact Property NOI and Same Store NOI on a cash basis until such abatements expire. As of September 30, 2017, we had approximately 421,000 square feet of executed leases related to currently vacant space that had not yet commenced and approximately 1.1 million square feet of commenced leases that were in some form of rental and/or operating expense abatement.

If we are unable to replace expiring leases with new or renewal leases at rental rates equal to or greater than the expiring rates, rental rate roll downs could occur and negatively impact Property NOI and Same Store NOI comparisons. As mentioned above, our geographically diverse portfolio and large block tenant model result in rent roll ups and roll downs that can fluctuate widely on a building-by-building and a quarter-to-quarter basis.

Same Store NOI increased 5.2% and 1.1% on a cash and accrual basis, respectively, during the three months ended September 30, 2017 and 11.0% and 6.7% on a cash and accrual basis, respectively, during the nine months endedSeptember 30, 2017, as compared to the same periods in the prior year. These increases are primarily the result of lease commencements (accrual basis) and the expiration of rental abatements associated with new leases (cash basis). In addition, Same Store NOI on both an accrual and cash basis were favorably impacted by the receipt of one-time restructuring fees and the recovery of prior year reimbursement income as a result of the resolution of a tenant dispute during the nine months ended September 30, 2017. Property NOI and Same Store NOI comparisons for any given period may still fluctuate as a result of the mix of net leasing activity in individual properties during the respective period.

Election as a REIT

We have elected to be taxed as a REIT under the Code and have operated as such beginning with our taxable year ended December 31, 1998. To qualify as a REIT, we must meet certain organizational and operational requirements, including a requirement to distribute at least 90% of our adjusted REIT taxable income, computed without regard to the dividends-paid deduction and by excluding net capital gains attributable to our stockholders, as defined by the Code. As a REIT, we generally will not be subject to federal income tax on income that we distribute to our stockholders. If we fail to qualify as a REIT in any taxable year, we may be subject to federal income taxes on our taxable income for that year and for the four years following the year during which qualification is lost and/or penalties, unless the IRS grants us relief under certain statutory provisions. Such an event could materially adversely affect our net income and net cash available for distribution to our stockholders. However, we believe that we are organized and operate in such a manner as to qualify for treatment as a REIT and intend to continue to operate in the foreseeable future in such a manner that we will remain qualified as a REIT for federal income tax purposes. We have elected to treat POH, a wholly-owned subsidiary of Piedmont, as a taxable REIT subsidiary. POH performs non-customary services for tenants of buildings that we own, including solar power generation, real estate and non-real estate related-services; however, any earnings related to such services

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performed by our taxable REIT subsidiary are subject to federal and state income taxes. In addition, for us to continue to qualify as a REIT, our investments in taxable REIT subsidiaries cannot exceed 25% (20% for taxable years beginning after 2017) of the value of our total assets.

Inflation

We are exposed to inflation risk, as income from long-term leases is the primary source of our cash flows from operations. There are provisions in the majority of our tenant leases that are intended to protect us from, and mitigate the risk of, the impact of inflation. These provisions include rent steps, reimbursement billings for operating expense pass-through charges, real estate tax, and insurance reimbursements on a per square-foot basis, or in some cases, annual reimbursement of operating expenses above certain per square-foot allowances. However, due to the long-term nature of the leases, the leases may not readjust their reimbursement rates frequently enough to fully cover inflation.

Off-Balance Sheet Arrangements

We are not dependent on off-balance sheet financing arrangements for liquidity. As of September 30, 2017, our off-balance sheet arrangement consists of an operating lease obligation related to a ground lease at one of our properties. For further information regarding our commitments under operating lease obligations, see the Contractual Obligations table below.

Application of Critical Accounting Policies

Our accounting policies have been established to conform with GAAP. The preparation of financial statements in conformity with GAAP requires management to use judgment in the application of accounting policies, including making estimates and assumptions. These judgments affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the dates of the financial statements and the reported amounts of revenue and expenses during the reporting periods. If our judgment or interpretation of the facts and circumstances relating to various transactions had been different, it is possible that different accounting policies would have been applied, thus, resulting in a different presentation of the financial statements. Additionally, other companies may utilize different estimates that may impact comparability of our results of operations to those of companies in similar businesses. The critical accounting policies outlined below have been discussed with members of the Audit Committee of the Board of Directors.

Investment in Real Estate Assets

We are required to make subjective assessments as to the useful lives of our depreciable assets. We consider the period of future benefit of the asset to determine the appropriate useful lives. These assessments have a direct impact on net income applicable to Piedmont. The estimated useful lives of our assets by class are as follows:

Buildings	40 years
Building improvements	5-25 years
Land improvements	20-25 years
Tenant allowances	Lease term
Furniture, fixtures, and equipment	3-5 years
Intangible lease assets	Lease term

Fair Value of Assets and Liabilities of Acquired Properties

Upon the acquisition of real properties, we record the relative fair value of properties to acquired tangible assets, consisting of land and buildings, and identified intangible assets and liabilities, consisting of the value of above-market and below-market leases and the value of in-place leases, based on their estimated fair values.

The estimated fair values of the tangible assets of an acquired property (which includes land and building) are determined by valuing the property as if it were vacant, and the “as-if-vacant” value is then allocated to land and building based on management’s determination of the relative fair value of these assets. We rely on a sales comparison approach using closed land sales and listings in determining the land value, and determine the as-if-vacant estimated fair value of a property using methods similar to those used by independent appraisers. Factors considered by management in performing these analyses include an estimate of carrying costs during the expected lease-up periods considering current market conditions and costs to execute similar leases. In estimating carrying costs, management includes real estate taxes, insurance, and other operating expenses and estimates of lost rental revenue

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during the expected lease-up periods based on current market demand. We also estimate the cost to execute similar leases including leasing commissions, legal, and other related costs.

The estimated fair values of above-market and below-market in-place leases are recorded based on the present value (using an interest rate which reflects the risks associated with the leases acquired) of the difference between (i) the contractual amounts to be paid pursuant to the in-place leases and (ii) management’s estimate of market rates for the corresponding in-place leases, measured over a period equal to the remaining terms of the leases, taking into consideration the probability of renewals for any below-market leases. The capitalized above-market and below-market lease values are recorded as intangible lease assets or liabilities and amortized as an adjustment to rental revenues over the remaining terms of the respective leases.

The estimated fair values of in-place leases include an estimate of the direct costs associated with obtaining the acquired or "in place" tenant, estimates of opportunity costs associated with lost rentals that are avoided by acquiring an in-place lease. The amount capitalized as direct costs associated with obtaining a tenant include commissions, tenant improvements, and other direct costs and are estimated based on management’s consideration of current market costs to execute a similar lease. These direct lease origination costs are included in deferred lease costs in the accompanying consolidated balance sheets and are amortized to expense over the remaining terms of the respective leases. The value of opportunity costs is calculated using the contractual amounts to be paid pursuant to the in-place leases over a market absorption period for a similar lease. These lease intangibles are included in intangible lease assets in the accompanying consolidated balance sheets and are amortized to expense over the remaining terms of the respective leases.

Estimating the fair values of the tangible and intangible assets requires us to estimate market lease rates, property operating expenses, carrying costs during lease-up periods, discount and capitalization rates, market absorption periods, and the number of years the property is held for investment. The use of inappropriate estimates would result in an incorrect assessment of our purchase price allocations, which would impact the amount of our reported net income attributable to Piedmont.

Valuation of Real Estate Assets and Investments in Joint Ventures which Hold Real Estate Assets

We continually monitor events and changes in circumstances that could indicate that the carrying amounts of the real estate and related intangible assets, both operating properties and properties under construction, in which we have an ownership interest, either directly or through investments in joint ventures, may not be recoverable. For wholly owned properties, when indicators of potential impairment are present, or when a sale in the near term is considered more than 50% probable, we assess whether the respective carrying values including a proportionate amount of goodwill, if applicable, will be recovered from the undiscounted future operating cash flows expected from the use of the asset and its eventual disposition for assets held for use, or from the estimated fair value, less costs to sell, for assets held for sale. In the event that the expected undiscounted future cash flows for assets held for use or the estimated fair value, less costs to sell, for assets held for sale do not exceed the respective asset carrying value, we adjust such assets to the respective estimated fair values and recognize an impairment loss. For our investments in unconsolidated joint ventures, we assess the estimated fair value of our investment, as compared to our carrying amount. If we determine that the carrying value is greater than the estimated fair value at any measurement date, we must also determine if such a difference is temporary in nature. Value fluctuations which are “other than temporary” in nature are then recorded to adjust the carrying value to the estimated fair value amount.

Projections of expected future cash flows require that we estimate future market rental income amounts subsequent to the expiration of current lease agreements, property operating expenses, the number of months it takes to re-lease the property, and the number of years the property is held for investment, among other factors. The subjectivity of assumptions used in the future cash flow analysis, including capitalization and discount rates, could result in an incorrect assessment of the property’s estimated fair value and, therefore, could result in the misstatement of the carrying value of our real estate and related intangible assets and our reported net income attributable to Piedmont.

Goodwill

Goodwill is the excess of cost of an acquired entity over the amounts specifically assigned to assets acquired and liabilities assumed in purchase accounting for business combinations, as well as costs incurred as part of the acquisition. We test the carrying value of our goodwill for impairment on an annual basis, or on an interim basis if an event occurs or circumstances change that would indicate the carrying amount may be impaired. Such interim circumstances may include, but are not limited to, significant adverse changes in legal factors or in the general business climate, adverse action or assessment by a regulator, unanticipated competition, the loss of key personnel, or persistent declines in an entity’s stock price below carrying value of the entity. We have the option, should we choose to use it, to first assess qualitative factors to determine whether the existence of events or circumstances leads to a determination that it is more likely than not that the estimated fair value of the reporting unit is less than its carrying amount. If, after assessing the totality of events or circumstances, we conclude that the estimated fair value is greater than the carrying amount, then performing the two-step impairment test is unnecessary. However, if we chose to forgo the availability of the qualitative

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analysis, the test prescribed by authoritative accounting guidance is a two-step test. The first step involves comparing the estimated fair value of the entity to its carrying value, including goodwill. Estimated fair value is determined by adjusting the trading price of the stock for a control premium, if necessary, multiplied by the common shares outstanding. If such calculated estimated fair value exceeds the carrying value, no further procedures or analysis is required. However, if the carrying value exceeds the calculated fair value, goodwill is potentially impaired and step two of the analysis would be required. Step two of the test involves calculating the implied fair value of goodwill by deducting the estimated fair value of all tangible and intangible net assets of the entity from the entity’s estimated fair value calculated in step one of the test. If the implied value of the goodwill (the remainder left after deducting the estimated fair values of the entity from its calculated overall estimated fair value in step one of the test) is less than the carrying value of goodwill, an impairment loss would be recognized. We have determined through the process noted above that there are no issues of impairment related to our goodwill as of September 30, 2017.

Investment in Variable Interest Entities

Variable Interest Entities (“VIEs”) are defined by GAAP as entities in which equity investors do not have sufficient equity at risk for the entity to finance its activities without additional subordinated financial support from other parties. If an entity is determined to be a VIE, it must be consolidated by the primary beneficiary. The primary beneficiary is the enterprise that has the power to direct the activities of the VIE that most significantly impact the VIE’s economic performance, absorbs the majority of the entity’s expected losses, or receives a majority of the entity’s expected residual returns. Generally, expected losses and expected residual returns are the anticipated negative and positive variability, respectively, in the estimated fair value of the VIE’s net assets. When we make an investment, we assess whether the investment represents a variable interest in a VIE and, if so, whether we are the primary beneficiary of the VIE. Incorrect assumptions or assessments may result in an inaccurate determination of the primary beneficiary. The result could be the consolidation of an entity acquired or formed in the future that would otherwise not have been consolidated or the non-consolidation of such an entity that would otherwise have been consolidated.

We evaluate each investment to determine whether it represents variable interests in a VIE. Further, we evaluate the sufficiency of the entities’ equity investment at risk to absorb expected losses, and whether as a group, the equity has the characteristics of a controlling financial interest. See Note 4 to our accompanying consolidated financial statements for further detail on our investment in variable interest entities.

Interest Rate Derivatives

We periodically enter into interest rate derivative agreements to hedge our exposure to changing interest rates on variable rate debt instruments. As required by GAAP, we record all derivatives on the balance sheet at estimated fair value. We reassess the effectiveness of our derivatives designated as cash flow hedges on a regular basis to determine if they continue to be highly effective and also to determine if the forecasted transactions remain highly probable. Currently, we do not use derivatives for trading or speculative purposes.

The changes in estimated fair value of interest rate swap agreements designated as effective cash flow hedges are recorded in other comprehensive income (“OCI”), and subsequently reclassified to earnings when the hedged transactions occur. Changes in the estimated fair values of derivatives designated as cash flow hedges that do not qualify for hedge accounting treatment, if any, would be recorded as gain/(loss) on interest rate swap in the consolidated statements of income. The estimated fair value of the interest rate derivative agreement is recorded as interest rate derivative asset or as interest rate derivative liability in the accompanying consolidated balance sheets. Amounts received or paid under interest rate derivative agreements are recorded as interest expense in the consolidated income statements as incurred. When Piedmont settles forward starting swap agreements for gains/losses, the result is recorded as accumulated other comprehensive income and is amortized as an offset/increase to interest expense over the term of the respective notes on a straight line basis (which approximates the effective interest method). All of our interest rate derivative agreements as of September 30, 2017 are designated as effective cash flow hedges. See Note 5 to our accompanying consolidated financial statements for further detail on our interest rate derivatives.

Stock-based Compensation

We have issued stock-based compensation in the form of restricted stock to our employees and directors. For employees, such compensation has been issued pursuant to our Long-term Incentive Compensation ("LTIC") program. The LTIC program is comprised of an annual deferred stock grant component and a multi-year performance share component. Awards granted pursuant to the annual deferred stock component are considered equity awards and expensed straight-line over the vesting period, with issuances recorded as a reduction to additional paid in capital. Awards granted pursuant to the performance share component are considered liability awards and are expensed over the service period, with issuances recorded as a reduction to accrued expense. The compensation expense recognized related to both of these award types is recorded as property operating costs for those employees whose job is related to property operation and as general and administrative expense for all other employees and

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directors in the accompanying consolidated statements of income. See Note 10 to our accompanying consolidated financial statements for further detail on our stock-based compensation.

Recent Accounting Pronouncements

The Financial Accounting Standards Board (the "FASB") has issued Accounting Standards Update No. 2014-09, Revenue from Contracts with Customers (Topic 606) ("ASU 2014-09") and Accounting Standards Update No. 2016-08, Revenue from Contracts with Customers (Topic 606) Principal versus Agent Considerations (Reporting Revenue Gross versus Net) ("ASU 2016-08"). The amendments in ASU 2014-09, which are further clarified in ASU 2016-08, as well as Accounting Standards Update 2016-10, Accounting Standards Update 2016-12, and Accounting Standards Update 2016-20 (collectively the "Revenue Recognition Amendments"), change the criteria for the recognition of certain revenue streams to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services using a five-step determination process. Steps 1 through 5 involve (i) identifying contracts with a customer, (ii) identifying the performance obligations in the contract, (iii) determining the transaction price, (iv) allocating the transaction price to the performance obligations, and (v) recognizing revenue as an entity satisfies a performance obligation. The revenues impacted by the Revenue Recognition Amendments include a portion of our tenant reimbursement revenues and property management fee revenues. Lease contracts and reimbursement revenues associated with property taxes and insurance are specifically excluded from the Revenue Recognition Amendments. The Revenue Recognition Amendments are effective in the first quarter of 2018 for us. Management has substantially completed its initial assessment of the impact of adoption of the Revenue Recognition Amendments. Approximately 90% of our total revenues are derived from either long-term leases with our tenants or reimbursement of property tax and insurance expenses, which are excluded from the scope of the Revenue Recognition Amendments. In addition, based on management's assessment to date, we do not expect the timing of the recognition of reimbursement revenue and revenue from management agreements to change as a result of the new guidance, though certain classifications will change between rental revenue and tenant reimbursements. Finally, management has determined, and the FASB has confirmed, that the evaluation of non-lease components under the new Revenue Recognition Amendments will not be effective until Accounting Standards Update No. 2016-02, Leases (Topic 842), ("ASU 2016-02") becomes effective (see further discussion below), which will be first quarter of 2019 for us. Although management continues to evaluate the guidance and disclosures required by the Revenue Recognition Amendments, we do not anticipate any material impact to our consolidated financial statements as a result of adoption.

The FASB has issued Accounting Standards Update No. 2017-05, Other Income—Gains and Losses from the Derecognition of Nonfinancial Assets (Subtopic 610-20): Clarifying the Scope of Asset Derecognition Guidance and Accounting for Partial Sales of Nonfinancial Assets ("ASU 2017-05"). The provisions of ASU 2017-05 define the term "in substance nonfinancial asset" as a financial asset promised to a counterparty in a contract if substantially all of the fair value of the assets (recognized and unrecognized) is concentrated in nonfinancial assets. Further, it states that nonfinancial assets should be derecognized once the counterparty obtains control. Finally, the amendments provide clarification for partial sales of nonfinancial assets. ASU 2017-05 is effective concurrent with the Revenue Recognition Amendments (detailed above), which will be the first quarter of 2018 for us. Although management continues to evaluate the guidance and disclosures required by ASU 2017-05, we do not anticipate a material change in how we recognize, measure, and classify the gain or loss on the disposition of real estate in our consolidated financial statements as a result of adoption.

The FASB has issued Accounting Standards Update No. 2016-01, Financial Instruments - Overall (Subtopic 825-10), Recognition and Measurement of Financial Assets and Financial Liabilities ("ASU 2016-01"). The amendments in ASU 2016-01 require equity investments, except those accounted for under the equity method of accounting, to be measured at estimated fair value with changes in fair value recognized in net income. Additionally, ASU 2016-01 simplifies the impairment assessment of equity investments, and eliminates certain disclosure requirements. The amendments in ASU 2016-01 are effective in the first quarter of 2018, and we do not anticipate any material impact to our consolidated financial statements as a result of adoption.

The FASB has issued Accounting Standards Update No. 2016-18, Statement of Cash Flows (Topic 230),Restricted Cash (a consensus of the FASB Emerging Issues Task Force) ("ASU 2016-18"). The provisions of ASU 2016-18 require entities to show changes in restricted cash and cash equivalents in addition to cash and cash equivalents in the statement of cash flows. As a result, entities will no longer present transfers between restricted and unrestricted cash in the statement of cash flows. Disclosures are required to reconcile the amount presented on the statement of cash flows to the balance sheet, as well as disclosing the nature of restriction on the restricted cash balances. ASU 2016-18 is effective for us in the first quarter of 2018, with early adoption permitted. We do not anticipate any material impact to our consolidated financial statements as a result of adoption.

The FASB has issued ASU 2016-02, which fundamentally changes the definition of a lease, as well as the accounting for operating leases by requiring lessees to recognize assets and liabilities which arise from the lease, consisting of a liability to make lease payments (the lease liability) and a right-of-use asset, representing the right to use the leased asset over the term of the lease. Accounting for leases by lessors is substantially unchanged from prior practice as lessors will continue to recognize lease revenue

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on a straight-line basis; however, ASU 2016-02 defines certain tenant reimbursements as non-lease components which will be subject to the guidance under ASU 2014-09. The amendments in ASU 2016-02 are effective in the first quarter of 2019, and we are currently evaluating the potential impact of adoption.

The FASB has issued Accounting Standards Update No. 2016-13, Financial Instruments—Credit Losses (Topic 326),Measurement of Credit Losses on Financial Instruments ("ASU 2016-13"). The provisions of ASU 2016-13 replace the "incurred loss" approach with an "expected loss" model for impairing trade and other receivables, held-to-maturity debt securities, net investment in leases, and off-balance-sheet credit exposures, which will generally result in earlier recognition of allowances for credit losses. Additionally, the provisions change the classification of credit losses related to available-for-sale securities to an allowance, rather than a direct reduction of the amortized cost of the securities. ASU 2016-13 is effective in the first quarter of 2020, with early adoption permitted as of January 1, 2019. We are currently evaluating the potential impact of adoption.

The FASB has issued Accounting Standards Update No. 2017-04, Intangibles—Goodwill and Other (Topic 350),Simplifying the Test for Goodwill Impairment ("ASU 2017-04"). The provisions of ASU 2017-04 simplify how an entity is required to test goodwill for impairment by eliminating Step 2 from the goodwill impairment test, which is generally performed annually unless events or circumstances arise which would necessitate evaluating the carrying value for impairment in the interim. Step 2 measures a goodwill impairment loss by comparing the implied fair value of a entity’s goodwill with the carrying amount of that goodwill by determining the fair value of its assets and liabilities (including unrecognized assets and liabilities) following the procedures that would be required in a business combination. Under the provisions of ASU 2017-04, an entity would instead recognize an impairment charge for the amount by which the carrying amount exceeds the entity’s fair value; however, the loss recognized should not exceed the total amount of goodwill allocated to that entity. ASU 2017-04 is effective in the first quarter of 2020, with early adoption permitted as of the first interim or annual impairment test of goodwill after January 1, 2017. We are currently evaluating the potential impact of adoption.

Related-Party Transactions and Agreements

There were no related-party transactions during the three and nine months endedSeptember 30, 2017.

Contractual Obligations

Our contractual obligations as of September 30, 2017 were as follows (in thousands):

	Payments Due by Period
Contractual Obligations	Total		Less than 1 year		1-3 years			3-5 years		More than 5 years
Long-term debt (1)	$	1,710,903	$	170,869	$	602,058	(2)(3)	$	187,976	$	750,000
Operating lease obligations (4)	2,834		93		186			187		2,368
Total	$	1,713,737	$	170,962	$	602,244		$	188,163	$	752,368

⁽¹⁾  Amounts include principal payments only and balances outstanding as of September 30, 2017, not including unamortized issuance discounts, debt issuance costs paid to lenders, or estimated fair value adjustments. We made interest payments, including payments under our interest rate swaps, of approximately $54.0 million during the nine months endedSeptember 30, 2017, and expect to pay interest in future periods on outstanding debt obligations based on the rates and terms disclosed herein and in Note 3 of our accompanying consolidated financial statements.

⁽²⁾  Includes the $300 Million Unsecured 2013 Term Loan which has a stated variable rate; however, we have entered into interest rate swap agreements which effectively fix, exclusive of changes to our credit rating, the rate on this facility to 2.78% through maturity. As such, we estimate incurring, exclusive of changes to our credit rating, approximately $8.3 million per annum in total interest (comprised of combination of variable contractual rate and settlements under interest rate swap agreements) through maturity in January 2019.

⁽³⁾  Includes the $300 Million Unsecured 2011 Term Loan which has a stated variable rate; however, we have entered into interest rate swap agreements which effectively fix, exclusive of changes to our credit rating, the rate on this facility to 3.35% through maturity. As such, we estimate incurring, exclusive of changes to our credit rating, approximately $10.1 million per annum in total interest (comprised of combination of variable contractual rate and settlements under interest rate swap agreements) through maturity in January 2020.

⁽⁴⁾  The 2001 NW 64th Street building in Ft. Lauderdale, Florida is subject to a ground lease with an expiration date in 2048. The aggregate remaining payments required under the terms of this operating lease as of September 30, 2017 are presented above.

48

Commitments and Contingencies

We are subject to certain commitments and contingencies with regard to certain transactions. Refer to Note 8 of our consolidated financial statements for further explanation. Examples of such commitments and contingencies include:

• Commitments Under Existing Lease Agreements; and

• Contingencies Related to Tenant Audits/Disputes.

ITEM 3. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

Our future income, cash flows, and estimated fair values of our financial instruments depend in part upon prevailing market interest rates. Market risk is the exposure to loss resulting from changes in interest rates, foreign currency, exchange rates, commodity prices, and equity prices. Our potential for exposure to market risk includes interest rate fluctuations in connection with borrowings under our $500 Million Unsecured 2015 Line of Credit, our $300 Million Unsecured 2011 Term Loan, the $300 Million Unsecured 2013 Term Loan, and the $170 Million Unsecured 2015 Term Loan. As a result, the primary market risk to which we believe we are exposed is interest rate risk. Many factors, including governmental monetary and tax policies, domestic and international economic and political considerations, and other factors that are beyond our control contribute to interest rate risk. Our interest rate risk management objectives are to limit the impact of interest rate changes on earnings and cash flow primarily through a low-to-moderate level of overall borrowings, as well as managing the variability in rate fluctuations on our outstanding debt. As such, all of our debt other than the $500 Million Unsecured 2015 Line of Credit and $170 Million Unsecured 2015 Term Loan is based on fixed or effectively-fixed interest rates to hedge against volatility in the credit markets.

We do not enter into derivative or interest rate transactions for speculative purposes, as such all of our debt and derivative instruments were entered into for other than trading purposes. The estimated fair value of our debt was approximately $1.7 billion and $2.0 billion as of September 30, 2017 and December 31, 2016, respectively. Our interest rate swap agreements in place at September 30, 2017 and December 31, 2016 carried a notional amount totaling $600 million with a weighted-average fixed interest rate (not including the corporate credit spread) of 1.89%.

As of September 30, 2017, our total outstanding debt subject to fixed, or effectively fixed, interest rates has an average effective interest rate of approximately 3.59% per annum with expirations ranging from 2018 to 2024. A change in the market interest rate impacts the net financial instrument position of our fixed-rate debt portfolio but has no impact on interest incurred or cash flows.

As of September 30, 2017, we had no amounts outstanding on our $500 Million Unsecured 2015 Line of Credit. Our $500 Million Unsecured 2015 Line of Credit currently has a stated rate of LIBOR plus 1.00% per annum (based on our current corporate credit rating) or the prime rate, at our discretion. The current stated interest rate spread on the $170 Million Unsecured 2015 Term Loan is LIBOR plus 1.125% (based on our current corporate credit rating), which, as of September 30, 2017, results in a total interest rate of 2.37%. To the extent that we borrow additional funds in the future under the $500 Million Unsecured 2015 Line of Credit or potential future variable-rate lines of credit, we would have exposure to increases in interest rates, which would potentially increase our cost of debt. Additionally, a 1.0% increase in variable interest rates on our existing outstanding borrowings as of September 30, 2017 would increase interest expense approximately $1.7 million on a per annum basis.

ITEM 4. CONTROLS AND PROCEDURES

Management’s Conclusions Regarding the Effectiveness of Disclosure Controls and Procedures

We carried out an evaluation, under the supervision and with the participation of management, including the Principal Executive Officer and the Principal Financial Officer, of the effectiveness of the design and operation of our disclosure controls and procedures as defined in Rule 15d-15(e) of the Securities Exchange Act of 1934 (the “Exchange Act”) as of the end of the quarterly period covered by this report. Based upon that evaluation, the Principal Executive Officer and the Principal Financial Officer concluded that our disclosure controls and procedures were effective as of the end of the period covered by this quarterly report in providing a reasonable level of assurance that information we are required to disclose in the reports we file or submit under the Exchange Act is recorded, processed, summarized, and reported within the time periods specified in applicable SEC rules and forms, including providing a reasonable level of assurance that information required to be disclosed by us in the reports we file under the Exchange Act is accumulated and communicated to our management, including the Principal Executive Officer and the Principal Financial Officer, as appropriate, to allow timely decisions regarding required disclosure.

49

Changes in Internal Control Over Financial Reporting

There were no changes in our internal control over financial reporting during the quarter ended September 30, 2017 that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

50

PART II. OTHER INFORMATION

ITEM 1. LEGAL PROCEEDINGS

Piedmont is not subject to any material pending legal proceedings. However, we are subject to routine litigation arising in the ordinary course of owning and operating real estate assets. Our management expects that these ordinary routine legal proceedings will be covered by insurance and does not expect these legal proceedings to have a material adverse effect on our financial condition, results of operations, or liquidity. Additionally, management is not aware of any legal proceedings against Piedmont contemplated by governmental authorities.

ITEM 1A. RISK FACTORS

There have been no known material changes from the risk factors previously disclosed in our Amended Annual Report on Form 10-K/A for the year ended December 31, 2016.

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

(a) There were no unregistered sales of equity securities during the third quarter 2017.

(b) Not applicable.

(c) During the three months ended September 30, 2017, we repurchased shares of our common stock in the open market in order to reissue such shares under our dividend reinvestment plan (the "DRP"), as well as repurchasing and retiring shares as part of our stock repurchase plan.

Of the 253,280 shares repurchased during the third quarter 2017, 195,341 shares (at an average price of $19.92 per share) related to repurchases of our common stock pursuant to our stock repurchase plan, and 57,939 shares (at an average price of $19.89 per share) related to shares purchased by our transfer agent on the open market and conveyed to participants in the DRP. The aggregate stock repurchases for the quarter ended September 30, 2017 are as follows:

Period	Total Number of Shares Purchased (in 000’s)	Average Price Paid per Share		Total Number of Shares  Purchased as Part of Publicly Announced Plan (in 000’s) (1)	Maximum Approximate Dollar Value of Shares Available That May Yet Be Purchased Under the Plan (in 000’s)
July 1, 2017 to July 31, 2017	—	$	—	—	$	250,000
August 1, 2017 to August 31, 2017	195	$	19.92	195	$	246,105
September 1, 2017 to September 30, 2017(2)	58	$	19.89	—	$	246,105	(1)
Total	253	$	19.89	195

⁽¹⁾  Amounts available for purchase relate only to our stock repurchase plan, which was authorized on May 2, 2017. Our Board of Directors authorized the repurchase of up to $250 million of shares of our common stock pursuant to the stock repurchase plan between May 2, 2017 and May 2, 2019. The share repurchase plan is separate from shares purchased for DRP issuance.

⁽²⁾  Under our amended and restated DRP, as set forth in a Current Report on Form 8-K filed February 24, 2011, we have the option to either issue shares that we purchase in the open market or issue shares directly from Piedmont from authorized but unissued shares. Such election will take place at the settlement of each quarterly dividend in which there are participants in our DRP, and may change from quarter to quarter based on our judgment of the best use of proceeds for Piedmont.

ITEM 3. DEFAULTS UPON SENIOR SECURITIES

Not applicable.

ITEM 4. MINE SAFETY DISCLOSURES

Not applicable.

51

ITEM 5. OTHER INFORMATION

None.

ITEM 6. EXHIBITS

Exhibit Number	Description of Document
3.1	Third Articles of Amendment and Restatement of Piedmont Office Realty Trust, Inc. (the “Company”) (incorporated by reference to Exhibit 3.1 to the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2009 filed on March 16, 2010)
3.2	Articles of Amendment of the Company effective June 30, 2011 (incorporated by reference to Exhibit 3.2 to the Company's Current Report on Form 8-K filed on July 6, 2011)
3.3	Articles Supplementary of the Company effective June 30, 2011 (incorporated by reference to Exhibit 3.1 to the Company's Current Report on Form 8-K filed on July 6, 2011)
3.4	Articles Supplementary to the Third Articles of Amendment and Restatement of the Company, as supplemented and amended (incorporated by reference to Exhibit 3.1 to the Company's Current Report on Form 8-K, filed on November 14, 2016)
3.5	Amended and Restated Bylaws of the Company (incorporated by reference to Exhibit 3.1 to the Company’s Current Report on Form 8-K filed on May 8, 2017)
31.1	Rule 13a-14(a)/15d-14(a) Certification, executed by Donald A. Miller, CFA, Principal Executive Officer of the Company
31.2	Rule 13a-14(a)/15d-14(a) Certification, executed by Robert E. Bowers, Principal Financial Officer of the Company
32.1	Certification required by Rule 13a-14(b)/15d-14(b) and Section 1350 of Chapter 63 of Title 18 of the United States Code, executed by Donald A. Miller, CFA, Chief Executive Officer and President of the Company
32.2	Certification required by Rule 13a-14(b)/15d-14(b) and Section 1350 of Chapter 63 of Title 18 of the United States Code, executed by Robert E. Bowers, Chief Financial Officer and Executive Vice-President of the Company
101.INS	XBRL Instance Document
101.SCH	XBRL Taxonomy Extension Schema
101.CAL	XBRL Taxonomy Extension Calculation Linkbase
101.DEF	XBRL Taxonomy Extension Definition Linkbase
101.LAB	XBRL Taxonomy Extension Label Linkbase
101.PRE	XBRL Taxonomy Extension Presentation Linkbase

52

SIGNATURES

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

		PIEDMONT OFFICE REALTY TRUST, INC.
		(Registrant)
Dated:	November 1, 2017	By:	/s/ Robert E. Bowers
			Robert E. Bowers
			Chief Financial Officer and Executive Vice President
			(Principal Financial Officer and Duly Authorized Officer)

53

EX-31.1

EXHIBIT 31.1

PRINCIPAL EXECUTIVE OFFICER CERTIFICATION

PURSUANT TO

SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002

I, Donald A. Miller, CFA, certify that:

1. I have reviewed this Form 10-Q for the quarter ended September 30, 2017 of Piedmont Office Realty Trust, 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)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

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

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

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

d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (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.

Dated: November 1, 2017

By:	/s/ Donald A. Miller, CFA
	Donald A. Miller, CFA
	Chief Executive Officer and President (Principal Executive Officer)

EX-31.2

EXHIBIT 31.2

PRINCIPAL FINANCIAL OFFICER CERTIFICATION

PURSUANT TO

SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002

I, Robert E. Bowers, certify that:

1. I have reviewed this Form 10-Q for the quarter ended September 30, 2017 of Piedmont Office Realty Trust, 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)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

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

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

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

d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (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.

Dated: November 1, 2017

By:	/s/ Robert E. Bowers
	Robert E. Bowers
	Chief Financial Officer and Executive Vice President (Principal Financial Officer)

EX-32.1

EXHIBIT 32.1

CERTIFICATION OF CHIEF EXECUTIVE OFFICER

PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002 (18 U.S.C. 1350)

In connection with the Report of Piedmont Office Realty Trust, Inc. (the “Registrant”) on Form 10-Q for the quarter ended September 30, 2017, as filed with the Securities and Exchange Commission (the “Report”), the undersigned, Donald A. Miller, CFA, Chief Executive Officer of the Registrant, hereby certifies, pursuant to 18 U.S.C. §1350, as adopted pursuant to §906 of the Sarbanes-Oxley Act of 2002, that, to the best of my knowledge and belief:

(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 Registrant.

By:	/s/ Donald A. Miller, CFA
	Donald A. Miller, CFA
	Chief Executive Officer and President
	November 1, 2017

EX-32.2

EXHIBIT 32.2

CERTIFICATION OF CHIEF FINANCIAL OFFICER

PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002 (18 U.S.C. 1350)

In connection with the Report of Piedmont Office Realty Trust, Inc. (the “Registrant”) on Form 10-Q for the quarter ended September 30, 2017, as filed with the Securities and Exchange Commission (the “Report”), the undersigned, Robert E. Bowers, Chief Financial Officer of the Registrant, hereby certifies, pursuant to 18 U.S.C. §1350, as adopted pursuant to §906 of the Sarbanes-Oxley Act of 2002, that, to the best of my knowledge and belief:

(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 Registrant.

By:	/s/ Robert E. Bowers
	Robert E. Bowers
	Chief Financial Officer and Executive Vice President
	November 1, 2017

XML

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2017	Oct. 31, 2017
Document and Entity Information [Abstract]
Entity Registrant Name	Piedmont Office Realty Trust, Inc.
Entity Central Index Key	0001042776
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	Sep. 30, 2017
Document Fiscal Year Focus	2017
Document Fiscal Period Focus	Q3
Amendment Flag	false
Entity Common Stock, Shares Outstanding		144,371,942

XML

Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Assets:
Land	$ 614,934	$ 617,138
Buildings and improvements, less accumulated depreciation of $926,105 and $856,254 as of September 30, 2017 and December 31, 2016, respectively	2,723,163	2,754,106
Intangible lease assets, less accumulated amortization of $93,265 and $109,152 as of September 30, 2017 and December 31, 2016, respectively	78,700	99,695
Construction in progress	8,957	34,814
Real estate assets held for sale, net	0	225,939
Total real estate assets	3,425,754	3,731,692
Investments in and amounts due from unconsolidated joint ventures	49	7,360
Cash and cash equivalents	36,108	6,992
Tenant receivables, net of allowance for doubtful accounts of $535 and $197 as of September 30, 2017 and December 31, 2016, respectively	12,802	26,494
Straight-line rent receivables	182,609	163,789
Restricted cash and escrows	1,260	1,212
Prepaid expenses and other assets	28,232	23,201
Goodwill	98,918	98,918
Interest rate swaps	34	0
Deferred lease costs, less accumulated amortization of $189,469 and $175,643 as of September 30, 2017 and December 31, 2016, respectively	274,884	298,695
Other assets held for sale, net	0	9,815
Total assets	4,060,650	4,368,168
Liabilities:
Unsecured debt, net of discount and unamortized debt issuance costs of $8,337 and $10,269 as of September 30, 2017 and December 31, 2016, respectively	1,511,663	1,687,731
Secured debt, net of premiums and unamortized debt issuance costs of $1,020 and $1,161 as of September 30, 2017 and December 31, 2016, respectively	191,923	332,744
Accounts payable, accrued expenses, and accrued capital expenditures	108,120	165,410
Deferred income	29,970	28,406
Intangible lease liabilities, less accumulated amortization of $54,637 and $49,225 as of September 30, 2017 and December 31, 2016, respectively	41,064	48,005
Interest rate swaps	3,915	8,169
Total liabilities	1,886,655	2,270,465
Commitments and Contingencies
Stockholders’ Equity:
Shares-in-trust, 150,000,000 shares authorized; none outstanding as of September 30, 2017 or December 31, 2016	0	0
Preferred stock, no par value, 100,000,000 shares authorized; none outstanding as of September 30, 2017 or December 31, 2016	0	0
Common stock, $.01 par value, 750,000,000 shares authorized; 145,294,845 and 145,235,313 shares issued and outstanding as of September 30, 2017 and December 31, 2016, respectively	1,453	1,452
Additional paid-in capital	3,676,706	3,673,128
Cumulative distributions in excess of earnings	(1,511,428)	(1,580,863)
Other comprehensive income	5,400	2,104
Piedmont stockholders’ equity	2,172,131	2,095,821
Noncontrolling interest	1,864	1,882
Total stockholders’ equity	2,173,995	2,097,703
Total liabilities and stockholders’ equity	$ 4,060,650	$ 4,368,168

XML

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Assets:
Intangible lease assets, accumulated amortization	$ 93,265	$ 109,152
Tenant receivables, allowance for doubtful accounts	535	197
Deferred lease costs, accumulated amortization	189,469	175,643
Liabilities:
Intangible lease liabilities, accumulated amortization	$ 54,637	$ 49,225
Stockholders’ Equity:
Shares-in-trust, shares authorized (in shares)	150,000,000	150,000,000
Shares-in-trust, shares outstanding (in shares)	0	0
Preferred stock, par value (in dollars per share)	$ 0	$ 0
Preferred stock, shares authorized (in shares)	100,000,000	100,000,000
Preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	750,000,000	750,000,000
Common stock, shares issued (in shares)	145,294,845	145,235,313
Common stock, shares outstanding (in shares)	145,294,845	145,235,313
Unsecured Debt
Liabilities:
Discount, (premiums) and unamortized debt issuance costs	$ 8,337	$ 10,269
Secured Debt
Liabilities:
Discount, (premiums) and unamortized debt issuance costs	(1,020)	(1,161)
Building and improvements
Assets:
Buildings and improvements, accumulated depreciation	$ 926,105	$ 856,254

XML

Consolidated Statements of Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Revenues:
Rental income	$ 113,350	$ 113,821	$ 361,048	$ 340,326
Tenant reimbursements	23,796	24,163	72,340	70,000
Property management fee revenue	441	501	1,341	1,478
Total revenues	137,587	138,485	434,729	411,804
Expenses:
Property operating costs	54,090	54,867	165,253	161,438
Depreciation	30,000	31,610	90,827	94,948
Amortization	18,123	18,640	57,852	53,848
Impairment loss on real estate assets	0	22,951	0	33,901
General and administrative	6,618	7,429	23,250	23,518
Operating expenses	108,831	135,497	337,182	367,653
Real estate operating income	28,756	2,988	97,547	44,151
Other income (expense):
Interest expense	(16,183)	(15,496)	(52,661)	(48,294)
Other income/(expense)	290	(720)	228	(467)
Net recoveries from casualty events	0	34	0	34
Equity in income of unconsolidated joint ventures	3,754	129	3,872	354
Other income (expense)	(12,139)	(16,053)	(48,561)	(48,373)
Income/(loss) from continuing operations	16,617	(13,065)	48,986	(4,222)
Discontinued operations:
Operating income	0	1	0	0
Income from discontinued operations	0	1	0	0
Gain/(loss) on sale of real estate assets, net	109,512	(57)	115,951	73,758
Net income/(loss)	126,129	(13,121)	164,937	69,536
Plus: Net income applicable to noncontrolling interest	4	14	10	7
Net income/(loss) applicable to Piedmont	$ 126,133	$ (13,107)	$ 164,947	$ 69,543
Per share information – basic and diluted:
Income/(loss) from continuing operations and gain/(loss) on sale of real estate assets (in dollars per share)	$ 0.87	$ (0.09)	$ 1.13	$ 0.48
Income from discontinued operations (in dollars per share)	0.00	0.00	0.00	0.00
Net income applicable to common stockholders (in dollars per share)	$ 0.87	$ (0.09)	$ 1.13	$ 0.48
Weighted-average common shares outstanding – basic (in shares)	145,415,678	145,231,160	145,372,182	145,228,755
Weighted-average common shares outstanding – diluted (in shares)	145,719,431	145,669,237	145,679,582	145,601,026

XML

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Statement of Comprehensive Income [Abstract]
Net income/(loss) applicable to Piedmont	$ 126,133	$ (13,107)	$ 164,947	$ 69,543
Other comprehensive income/(loss):
Effective portion of gain/(loss) on derivative instruments that are designated and qualify as cash flow hedges (See Note 5)	175	2,847	307	(12,182)
Plus: Reclassification of previously recorded loss included in net income (See Note 5)	653	1,045	2,936	3,291
Gain on investment in available for sale securities	25	7	53	19
Other comprehensive income/(loss)	853	3,899	3,296	(8,872)
Comprehensive income/(loss) applicable to Piedmont	$ 126,986	$ (9,208)	$ 168,243	$ 60,671

XML

Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Cumulative Distributions in Excess of Earnings	Other Comprehensive Income/(Loss)	Non- controlling Interest
Balance at Dec. 31, 2015	$ 2,123,420	$ 1,455	$ 3,669,977	$ (1,550,698)	$ 1,661	$ 1,025
Balance (in shares) at Dec. 31, 2015		145,512,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income applicable to noncontrolling interest	(7)
Net income applicable to Piedmont	69,543
Other comprehensive income	$ (8,872)
Balance (in shares) at Sep. 30, 2016	145,234,000
Balance at Dec. 31, 2015	$ 2,123,420	$ 1,455	3,669,977	(1,550,698)	1,661	1,025
Balance (in shares) at Dec. 31, 2015		145,512,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share repurchases as part of an announced plan	(7,943)	$ (5)		(7,938)
Share repurchases as part of an announced plan (in shares)		(462,000)
Offering costs	(342)		(342)
Noncontrolling interest in consolidated joint venture	888		0			888
Dividends to common stockholders ($0.84 (YTD 2016) and $0.63 (YTD 2017) per share), dividends to stockholders of subsidiary, and dividends reinvested	(122,148)		(173)	(121,959)		(16)
Shares issued and amortized under the 2007 Omnibus Incentive Plan, net of tax	3,668	$ 2	3,666
Shares issued and amortized under the 2007 Omnibus Incentive Plan, net of tax (in shares)		185,000
Net income applicable to noncontrolling interest	(15)					(15)
Net income applicable to Piedmont	99,732			99,732
Other comprehensive income	443				443
Balance at Dec. 31, 2016	$ 2,097,703	$ 1,452	3,673,128	(1,580,863)	2,104	1,882
Balance (in shares) at Dec. 31, 2016	145,235,313	145,235,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share repurchases as part of an announced plan	$ (3,895)	$ (2)		(3,893)
Share repurchases as part of an announced plan (in shares)		(195,000)
Offering costs	(97)		(97)
Dividends to common stockholders ($0.84 (YTD 2016) and $0.63 (YTD 2017) per share), dividends to stockholders of subsidiary, and dividends reinvested	(91,706)		(79)	(91,619)		(8)
Shares issued and amortized under the 2007 Omnibus Incentive Plan, net of tax	3,757	$ 3	3,754
Shares issued and amortized under the 2007 Omnibus Incentive Plan, net of tax (in shares)		255,000
Net income applicable to noncontrolling interest	(10)					(10)
Net income applicable to Piedmont	164,947			164,947
Other comprehensive income	3,296				3,296
Balance at Sep. 30, 2017	$ 2,173,995	$ 1,453	$ 3,676,706	$ (1,511,428)	$ 5,400	$ 1,864
Balance (in shares) at Sep. 30, 2017	145,294,845	145,295,000

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Consolidated Statements of Stockholders' Equity (Unaudited) (Parenthetical) - $ / shares	9 Months Ended	12 Months Ended
	Sep. 30, 2017	Dec. 31, 2016
Statement of Stockholders' Equity [Abstract]
Dividends to common stockholders per share (in USD per share)	$ 0.63	$ 0.84

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Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Cash Flows from Operating Activities:
Net income	$ 164,937	$ 69,536
Operating distributions received from unconsolidated joint ventures	0	579
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	90,827	94,948
Amortization of debt issuance costs	1,214	1,264
Other amortization	57,146	53,325
Impairment loss on real estate assets	0	33,901
Stock compensation expense	6,657	7,630
Equity in income of unconsolidated joint ventures	(3,872)	(354)
Gain on sale of real estate assets, net	(115,951)	(73,758)
Changes in assets and liabilities:
Decrease in tenant and straight-line rent receivables, net	(15,040)	(17,393)
(Increase)/decrease in restricted cash and escrows	(656)	3,451
Increase in prepaid expenses and other assets	(4,580)	(3,429)
(Decrease)/increase in accounts payable and accrued expenses	(5,863)	307
Decrease in deferred income	1,513	2,029
Net cash provided by operating activities	176,332	172,036
Cash Flows from Investing Activities:
Acquisition of real estate assets, related intangibles, and cash held in escrow for acquisitions	0	(66,900)
Capitalized expenditures, net of accruals	(65,407)	(88,391)
Investment in consolidated joint venture	0	(165,848)
Net sales proceeds from wholly-owned properties	375,199	304,902
Net sales proceeds from unconsolidated joint ventures	12,334	0
Investments in unconsolidated joint ventures	(1,162)	0
Deferred lease costs paid	(19,419)	(15,345)
Net cash provided by/(used in) investing activities	301,545	(31,582)
Cash Flows from Financing Activities:
Debt issuance costs paid	(101)	(212)
Proceeds from debt	147,000	552,000
Repayments of debt	(466,046)	(589,532)
Costs of issuance of common stock	(97)	(239)
Value of shares withheld to pay tax obligations related to employee stock compensation	(3,385)	(2,328)
Repurchases of common stock as part of announced plan	(3,895)	(7,943)
Dividends paid and discount on dividend reinvestments	(122,237)	(91,609)
Net cash used in financing activities	(448,761)	(139,863)
Net increase in cash and cash equivalents	29,116	591
Cash and cash equivalents, beginning of period	6,992	5,441
Cash and cash equivalents, end of period	36,108	6,032
Supplemental Disclosures of Significant Noncash Investing and Financing Activities:
Accrued dividends and discount on dividend reinvestments	(30,531)	0
Accrued capital expenditures and deferred lease costs	8,590	24,624
Investment in consolidated joint venture	$ 63,026	$ 0

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Organization

9 Months Ended

Sep. 30, 2017

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Organization

Organization

Piedmont Office Realty Trust, Inc. (“Piedmont”) (NYSE: PDM) is a Maryland corporation that operates in a manner so as to qualify as a real estate investment trust (“REIT”) for federal income tax purposes and engages in the acquisition, development, management, and ownership of commercial real estate properties throughout the United States, including properties that are under construction, are newly constructed, or have operating histories. Piedmont was incorporated in 1997 and commenced operations in 1998. Piedmont conducts business primarily through Piedmont Operating Partnership, L.P. (“Piedmont OP”), a Delaware limited partnership, as well as performing the management of its buildings through two wholly-owned subsidiaries, Piedmont Government Services, LLC and Piedmont Office Management, LLC. Piedmont owns 99.9% of, and is the sole general partner of, Piedmont OP and as such, possesses full legal control and authority over the operations of Piedmont OP. The remaining 0.1% ownership interest of Piedmont OP is held indirectly by Piedmont through its wholly-owned subsidiary, Piedmont Office Holdings, Inc. ("POH"), the sole limited partner of Piedmont OP. Piedmont OP owns properties directly, through wholly-owned subsidiaries, and through consolidated joint ventures. References to Piedmont herein shall include Piedmont and all of its subsidiaries, including Piedmont OP and its subsidiaries and joint ventures.

As of September 30, 2017, Piedmont owned 66 in-service office properties. Piedmont's total consolidated portfolio consists of approximately 19 million square feet of primarily Class A commercial office space, and was 89.2% leased as of September 30, 2017. As of September 30, 2017, approximately 88% of Piedmont's ALR was generated from select sub-markets located primarily within eight major office markets located in the Eastern-half of the United States: Atlanta, Boston, Chicago, Dallas, Minneapolis, New York, Orlando, and Washington, D.C.

Piedmont internally evaluates all of its real estate assets as one operating segment, and accordingly, does not report segment information.

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Summary of Significant Accounting Policies

9 Months Ended

Sep. 30, 2017

Accounting Policies [Abstract]

Summary of Significant Accounting Policies

Summary of Significant Accounting Policies

Basis of Presentation and Principles of Consolidation

The consolidated financial statements of Piedmont have been prepared in accordance with the rules and regulations of the Securities and Exchange Commission (the “SEC”), including the instructions to Form 10-Q and Article 10 of Regulation S-X, and do not include all of the information and footnotes required by GAAP for complete financial statements. In the opinion of management, the statements for the unaudited interim periods presented include all adjustments, which are of a normal and recurring nature, necessary for a fair presentation of the results for such periods. Results for these interim periods are not necessarily indicative of a full year’s results.

Piedmont’s consolidated financial statements include the accounts of Piedmont, Piedmont’s wholly-owned subsidiaries, any variable interest entity ("VIE") for which Piedmont or any of its wholly-owned subsidiaries is considered to have the power to direct the activities of the entity and the obligation to absorb losses/right to receive benefits, or any entity in which Piedmont or any of its wholly-owned subsidiaries owns a controlling interest. In determining whether Piedmont or Piedmont OP has a controlling interest, the following factors, among others, are considered: equity ownership, voting rights, protective rights of investors, and participatory rights of investors. For further information, refer to the financial statements and footnotes included in Piedmont’s Amended Annual Report on Form 10-K/A for the year ended December 31, 2016.

All intercompany balances and transactions have been eliminated upon consolidation.

Further, Piedmont has formed special purpose entities to acquire and hold real estate. Each special purpose entity is a separate legal entity. Consequently, the assets of these special purpose entities are not available to all creditors of Piedmont. The assets owned by these special purpose entities are being reported on a consolidated basis with Piedmont’s assets for financial reporting purposes only.

Use of Estimates

The preparation of the accompanying consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the amounts reported in the accompanying consolidated financial statements and notes. Actual results could differ from those estimates.

Income Taxes

Piedmont has elected to be taxed as a REIT under the Internal Revenue Code of 1986, as amended, and has operated as such, beginning with its taxable year ended December 31, 1998. To qualify as a REIT, Piedmont must meet certain organizational and operational requirements, including a requirement to distribute at least 90% of its annual REIT taxable income. As a REIT, Piedmont is generally not subject to federal income taxes, subject to fulfilling, among other things, this distribution requirement. Piedmont is subject to certain taxes related to the operations of properties in certain locations, as well as operations conducted by its taxable REIT subsidiary, POH, which have been provided for in the financial statements.

Reclassifications

Certain prior period amounts presented in Piedmont's Amended Annual Report on Form 10-K/A for the year ended December 31, 2016 have been reclassified to conform to the current period financial statement presentation. The reclassifications relate to the Two Independence Square building, located in Washington, D.C., which was first classified as held for sale as of March 31, 2017, and was sold on July 5, 2017. Applicable balances related to the same asset remain classified as held for sale as of December 31, 2016.

Recent Accounting Pronouncements

The Financial Accounting Standards Board (the "FASB") has issued Accounting Standards Update No. 2014-09, Revenue from Contracts with Customers (Topic 606) ("ASU 2014-09") and Accounting Standards Update No. 2016-08, Revenue from Contracts with Customers (Topic 606) Principal versus Agent Considerations (Reporting Revenue Gross versus Net) ("ASU 2016-08"). The amendments in ASU 2014-09, which are further clarified in ASU 2016-08, as well as Accounting Standards Update 2016-10, Accounting Standards Update 2016-12, and Accounting Standards Update 2016-20 (collectively the "Revenue Recognition Amendments"), change the criteria for the recognition of certain revenue streams to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services using a five-step determination process. Steps 1 through 5 involve (i) identifying contracts with a customer, (ii) identifying the performance obligations in the contract, (iii) determining the transaction price, (iv) allocating the transaction price to the performance obligations, and (v) recognizing revenue as an entity satisfies a performance obligation. The revenues impacted by the Revenue Recognition Amendments include a portion of Piedmont's tenant reimbursement revenues and property management fee revenues. Lease contracts and reimbursement revenues associated with property taxes and insurance are specifically excluded from the Revenue Recognition Amendments. The Revenue Recognition Amendments are effective in the first quarter of 2018 for Piedmont. Management has substantially completed its initial assessment of the impact of adoption of the Revenue Recognition Amendments. Approximately 90% of Piedmont's total revenues are derived from either long-term leases with its tenants or reimbursement of property tax and insurance expenses, which are excluded from the scope of the Revenue Recognition Amendments. In addition, based on management's assessment to date, Piedmont does not expect the timing of the recognition of reimbursement revenue and revenue from management agreements to change as a result of the new guidance, though certain classifications will change between rental revenue and tenant reimbursements. Finally, management has determined, and the FASB has confirmed, that the evaluation of non-lease components under the new Revenue Recognition Amendments will not be effective until Accounting Standards Update No. 2016-02, Leases (Topic 842), ("ASU 2016-02") becomes effective (see further discussion below), which will be first quarter of 2019 for Piedmont. Although management continues to evaluate the guidance and disclosures required by the Revenue Recognition Amendments, Piedmont does not anticipate any material impact to its consolidated financial statements as a result of adoption.

The FASB has issued Accounting Standards Update No. 2017-05, Other Income—Gains and Losses from the Derecognition of Nonfinancial Assets (Subtopic 610-20): Clarifying the Scope of Asset Derecognition Guidance and Accounting for Partial Sales of Nonfinancial Assets ("ASU 2017-05"). The provisions of ASU 2017-05 define the term "in substance nonfinancial asset" as a financial asset promised to a counterparty in a contract if substantially all of the fair value of the assets (recognized and unrecognized) is concentrated in nonfinancial assets. Further, it states that nonfinancial assets should be derecognized once the counterparty obtains control. Finally, the amendments provide clarification for partial sales of nonfinancial assets. ASU 2017-05 is effective concurrent with the Revenue Recognition Amendments (detailed above), which will be the first quarter of 2018 for Piedmont. Although management continues to evaluate the guidance and disclosures required by ASU 2017-05, Piedmont does not anticipate a material change in how it recognizes, measures, and classifies the gain or loss on the disposition of real estate in its consolidated financial statements as a result of adoption.

The FASB has issued Accounting Standards Update No. 2016-01, Financial Instruments - Overall (Subtopic 825-10), Recognition and Measurement of Financial Assets and Financial Liabilities ("ASU 2016-01"). The amendments in ASU 2016-01 require equity investments, except those accounted for under the equity method of accounting, to be measured at estimated fair value with changes in fair value recognized in net income. Additionally, ASU 2016-01 simplifies the impairment assessment of equity investments, and eliminates certain disclosure requirements. The amendments in ASU 2016-01 are effective in the first quarter of 2018, and Piedmont does not anticipate any material impact to its consolidated financial statements as a result of adoption.

The FASB has issued Accounting Standards Update No. 2016-18, Statement of Cash Flows (Topic 230),Restricted Cash (a consensus of the FASB Emerging Issues Task Force) ("ASU 2016-18"). The provisions of ASU 2016-18 require entities to show changes in restricted cash and cash equivalents in addition to cash and cash equivalents in the statement of cash flows. As a result, entities will no longer present transfers between restricted and unrestricted cash in the statement of cash flows. Disclosures are required to reconcile the amount presented on the statement of cash flows to the balance sheet, as well as disclosing the nature of restriction on the restricted cash balances. ASU 2016-18 is effective for Piedmont in the first quarter of 2018, with early adoption permitted. Piedmont does not anticipate any material impact to its consolidated financial statements as a result of adoption.

The FASB has issued ASU 2016-02, which fundamentally changes the definition of a lease, as well as the accounting for operating leases by requiring lessees to recognize assets and liabilities which arise from the lease, consisting of a liability to make lease payments (the lease liability) and a right-of-use asset, representing the right to use the leased asset over the term of the lease. Accounting for leases by lessors is substantially unchanged from prior practice as lessors will continue to recognize lease revenue on a straight-line basis; however, ASU 2016-02 defines certain tenant reimbursements as non-lease components which will be subject to the guidance under ASU 2014-09. The amendments in ASU 2016-02 are effective in the first quarter of 2019, and Piedmont is currently evaluating the potential impact of adoption.

The FASB has issued Accounting Standards Update No. 2016-13, Financial Instruments—Credit Losses (Topic 326),Measurement of Credit Losses on Financial Instruments ("ASU 2016-13"). The provisions of ASU 2016-13 replace the "incurred loss" approach with an "expected loss" model for impairing trade and other receivables, held-to-maturity debt securities, net investment in leases, and off-balance-sheet credit exposures, which will generally result in earlier recognition of allowances for credit losses. Additionally, the provisions change the classification of credit losses related to available-for-sale securities to an allowance, rather than a direct reduction of the amortized cost of the securities. ASU 2016-13 is effective in the first quarter of 2020, with early adoption permitted as of January 1, 2019. Piedmont is currently evaluating the potential impact of adoption.

The FASB has issued Accounting Standards Update No. 2017-04, Intangibles—Goodwill and Other (Topic 350),Simplifying the Test for Goodwill Impairment ("ASU 2017-04"). The provisions of ASU 2017-04 simplify how an entity is required to test goodwill for impairment by eliminating Step 2 from the goodwill impairment test, which is generally performed annually unless events or circumstances arise which would necessitate evaluating the carrying value for impairment in the interim. Step 2 measures a goodwill impairment loss by comparing the implied fair value of a entity’s goodwill with the carrying amount of that goodwill by determining the fair value of its assets and liabilities (including unrecognized assets and liabilities) following the procedures that would be required in a business combination. Under the provisions of ASU 2017-04, an entity would instead recognize an impairment charge for the amount by which the carrying amount exceeds the entity’s fair value; however, the loss recognized should not exceed the total amount of goodwill allocated to that entity. ASU 2017-04 is effective in the first quarter of 2020, with early adoption permitted as of the first interim or annual impairment test of goodwill after January 1, 2017. Piedmont is currently evaluating the potential impact of adoption.

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Debt

9 Months Ended

Sep. 30, 2017

Debt Disclosure [Abstract]

Debt

Debt

During the three months ended September 30, 2017, Piedmont fully repaid the $140 Million WDC Fixed-Rate Loans prior to the maturity date without penalty and repaid the outstanding balance of the $500 Million Unsecured 2015 Line of Credit, using a portion of the net proceeds from the sale of the Two Independence Square building (see Note 9).

The following table summarizes the terms of Piedmont’s indebtedness outstanding as of September 30, 2017 and December 31, 2016 (in thousands):

Facility (1)	Stated Rate		Effective Rate (2)			Maturity		Amount Outstanding as of
								September 30, 2017		December 31, 2016
Secured (Fixed)
$140 Million WDC Fixed-Rate Loans	5.76	%	5.76	%		11/1/2017		$	—	$	140,000
$35 Million Fixed-Rate Loan (3)	5.55	%	3.75	%		9/1/2021		30,903		31,583
$160 Million Fixed-Rate Loan (4)	3.48	%	3.58	%		7/5/2022		160,000		160,000
Net premium and unamortized debt issuance costs								1,020		1,161
Subtotal/Weighted Average (5)	3.82	%						191,923		332,744
Unsecured (Variable and Fixed)
$170 Million Unsecured 2015 Term Loan (6)	LIBOR + 1.125%		2.37	%		5/15/2018		170,000		170,000
$300 Million Unsecured 2013 Term Loan	LIBOR + 1.20%		2.78	%	(7)	1/31/2019		300,000		300,000
$500 Million Unsecured 2015 Line of Credit (6)	LIBOR + 1.00%		—	%		6/18/2019	(8)	—		178,000
$300 Million Unsecured 2011 Term Loan	LIBOR +  1.15%		3.35	%	(7)	1/15/2020		300,000		300,000
$350 Million Senior Notes	3.40	%	3.43	%		6/01/2023		350,000		350,000
$400 Million Senior Notes	4.45	%	4.10	%		3/15/2024		400,000		400,000
Discounts and unamortized debt issuance costs								(8,337)		(10,269)
Subtotal/Weighted Average (5)	3.43	%						1,511,663		1,687,731
Total/Weighted Average (5)	3.47	%						$	1,703,586	$	2,020,475

⁽¹⁾  Other than the $35 Million Fixed-Rate Loan, all of Piedmont’s outstanding debt as of September 30, 2017 and December 31, 2016 is interest-only.

⁽²⁾  Effective rate after consideration of settled or in-place interest rate swap agreements, issuance premiums/discounts, and/or fair market value adjustments upon assumption of debt.

⁽³⁾  Collateralized by the 5 Wall Street building in Burlington, Massachusetts.

⁽⁴⁾  Collateralized by the 1901 Market Street building in Philadelphia, Pennsylvania.

⁽⁵⁾  Weighted average is based on contractual balance of outstanding debt and the stated or effectively fixed interest rates in the table as of September 30, 2017.

⁽⁶⁾  On a periodic basis, Piedmont may select from multiple interest rate options, including the prime rate and various-length LIBOR locks. All LIBOR selections are subject to an additional spread over the selected rate based on Piedmont’s current credit rating.

⁽⁷⁾  Facility has a stated variable rate; however, Piedmont has entered into interest rate swap agreements which effectively fix, exclusive of Piedmont's credit rating, the rate shown as the effective rate.

⁽⁸⁾  Piedmont may extend the term for up to one additional year (through two available six month extensions to a final extended maturity date of June 18, 2020) provided Piedmont is not then in default and upon payment of extension fees.

Piedmont made interest payments on all debt facilities, including interest rate swap cash settlements, of approximately $18.0 million and $18.5 million for the three months endedSeptember 30, 2017 and 2016, respectively, and approximately $54.0 million and $53.2 million for the nine months endedSeptember 30, 2017 and 2016, respectively. Also, Piedmont capitalized interest of approximately $37,000 and $1.5 million for the three months endedSeptember 30, 2017 and 2016, respectively, and approximately $0.2 million and $3.4 million for the nine months endedSeptember 30, 2017 and 2016, respectively. As of September 30, 2017, Piedmont believes it was in compliance with all financial covenants associated with its debt instruments. See Note 6 for a description of Piedmont’s estimated fair value of debt as of September 30, 2017.

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Variable Interest Entities

9 Months Ended

Sep. 30, 2017

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Variable Interest Entities

Variable Interest Entities

Variable interest holders who have the power to direct the activities of the VIE that most significantly impact the entity’s economic performance and have the obligation to absorb the majority of losses of the entity or the right to receive significant benefits of the entity must consolidate the VIE. Each of the following VIEs has the sole purpose of holding land and office buildings and their resulting operations, and are classified in the accompanying consolidated balance sheets in the same manner as Piedmont’s wholly-owned properties.

A summary of Piedmont’s interests in, and consolidation treatment of, its VIEs and their related carrying values as of September 30, 2017 and December 31, 2016 is as follows (net carrying amount in millions):

Entity	Piedmont’s % Ownership of Entity		Related Building	Consolidated/ Unconsolidated	Net Carrying Amount as of September 30, 2017		Net Carrying Amount as of December 31, 2016			Primary Beneficiary Considerations
1201 Eye Street N.W. Associates, LLC	98.6%	(1)	1201 Eye Street	Consolidated	$	82.1	$	(6.7	)	In accordance with the partnership’s governing documents, Piedmont currently receives 100% of the cash flow of the entity and has sole discretion in directing the management and leasing activities of the building.
1225 Eye Street N.W. Associates, LLC	98.1%	(1)	1225 Eye Street	Consolidated	$	66.2	$	9.9		In accordance with the partnership’s governing documents, Piedmont currently receives 100% of the cash flow of the entity and has sole discretion in directing the management and leasing activities of the building.
Piedmont 500 W. Monroe Fee, LLC	100%		500 W. Monroe	Consolidated	$	265.2	$	262.4		The Omnibus Agreement with the previous owner includes equity participation rights for the previous owner, if certain financial returns are achieved; however, Piedmont has sole decision making authority and is entitled to 100% of the economic benefits of the property until such returns are met.

⁽¹⁾ During the three months endedSeptember 30, 2017, Piedmont repaid a $140 million mortgage secured by the 1201 and 1225 Eye Street properties located in Washington, D.C., and recapitalized the 1201 and 1225 Eye Street N.W. Associates, LLCs, increasing Piedmont's ownership from 49.5% in each of the LLCs to the amounts stated above.

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Derivative Instruments

9 Months Ended

Sep. 30, 2017

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Derivative Instruments

Derivative Instruments

Risk Management Objective of Using Derivatives

In addition to operational risks which arise in the normal course of business, Piedmont is exposed to economic risks such as interest rate, liquidity, and credit risk. In certain situations, Piedmont has entered into derivative financial instruments such as interest rate swap agreements and other similar agreements to manage interest rate risk exposure arising from current or future variable rate debt transactions. Interest rate swap agreements involve the receipt or payment of future known and uncertain cash amounts, the value of which are determined by interest rates. Piedmont’s objective in using interest rate derivatives is to add stability to interest expense and to manage its exposure to interest rate movements.

Cash Flow Hedges of Interest Rate Risk

Interest rate swaps designated as cash flow hedges involve the receipt of variable-rate amounts from a counterparty in exchange for Piedmont making fixed-rate payments over the life of the agreements without changing the underlying notional amount. As of September 30, 2017, Piedmont was party to various interest rate swap agreements, all of which are designated as effective cash flow hedges and fully hedge the variable cash flows covering the entire outstanding balances of the $300 Million Unsecured 2011 Term Loan and the $300 Million Unsecured 2013 Term Loan. The maximum length of time over which Piedmont is hedging its exposure to the variability in future cash flows for forecasted transactions is 27 months.

A detail of Piedmont’s interest rate derivatives outstanding as of September 30, 2017 is as follows:

Interest Rate Derivatives:	Number of Swap Agreements	Associated Debt Instrument	Total Notional Amount (in millions)		Effective Date	Maturity Date
Interest rate swaps	4	$300 Million Unsecured 2013 Term Loan	$	200	1/30/2014	1/31/2019
Interest rate swaps	2	$300 Million Unsecured 2013 Term Loan	100		8/29/2014	1/31/2019
Interest rate swaps	3	$300 Million Unsecured 2011 Term Loan	300		11/22/2016	1/15/2020
Total			$	600

Piedmont presents its interest rate derivatives on its consolidated balance sheets on a gross basis as interest rate swap assets and interest rate swap liabilities. A detail of Piedmont’s interest rate derivatives on a gross and net basis as of September 30, 2017 and December 31, 2016, respectively, is as follows (in thousands):

Interest rate swaps classified as:	September 30, 2017			December 31, 2016
Gross derivative assets	$	34		$	—
Gross derivative liabilities	(3,915		)	(8,169		)
Net derivative asset/(liability)	$	(3,881	)	$	(8,169	)

The effective portion of Piedmont's interest rate derivatives, including the gain/(loss) on previously settled forward swaps, that was recorded in the accompanying consolidated statements of income for the three and nine months endedSeptember 30, 2017 and 2016, respectively, was as follows (in thousands):

	Three Months Ended				Nine Months Ended
Interest Rate Swaps in Cash Flow Hedging Relationships	September 30, 2017		September 30, 2016		September 30, 2017		September 30, 2016
Amount of gain/(loss) recognized in OCI	$	175	$	2,847	$	307	$	(12,182	)
Amount of previously recorded loss reclassified from accumulated OCI into interest expense	$	653	$	1,045	$	2,936	$	3,291

Piedmont estimates that approximately $1.2 million will be reclassified from accumulated other comprehensive loss to interest expense over the next twelve months. Piedmont recognized no loss related to hedge ineffectiveness of its cash flow hedges during the three and nine months endedSeptember 30, 2017 and 2016, respectively.

Additionally, see Note 6 for fair value disclosures of Piedmont's derivative instruments.

Credit-risk-related Contingent Features

Piedmont has agreements with its derivative counterparties that contain a provision whereby if Piedmont defaults on any of its indebtedness, including default where repayment of the indebtedness has not been accelerated by the lender, then Piedmont could also be declared in default on its derivative obligations. If Piedmont were to breach any of the contractual provisions of the derivative contracts, it could be required to settle its obligations under the agreements at their termination value of the estimated fair values plus accrued interest, or approximately $4.0 million as of September 30, 2017. Additionally, Piedmont has rights of set-off under certain of its derivative agreements related to potential termination fees and amounts payable under the agreements, if a termination were to occur.

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Fair Value Measurement of Financial Instruments

9 Months Ended

Sep. 30, 2017

Fair Value Disclosures [Abstract]

Fair Value Measurement of Financial Instruments

Fair Value Measurement of Financial Instruments

Piedmont considers its cash and cash equivalents, tenant receivables, restricted cash and escrows, accounts payable and accrued expenses, interest rate swap agreements, and debt to meet the definition of financial instruments. The following table sets forth the carrying and estimated fair value for each of Piedmont’s financial instruments, as well as its level within the GAAP fair value hierarchy, as of September 30, 2017 and December 31, 2016, respectively (in thousands):

	September 30, 2017					December 31, 2016
Financial Instrument	Carrying Value		Estimated Fair Value		Level Within Fair Value Hierarchy	Carrying Value		Estimated Fair Value		Level Within Fair Value Hierarchy
Assets:
Cash and cash equivalents(1)	$	36,108	$	36,108	Level 1	$	6,992	$	6,992	Level 1
Tenant receivables, net(1)	$	12,802	$	12,802	Level 1	$	26,494	$	26,494	Level 1
Restricted cash and escrows(1)	$	1,260	$	1,260	Level 1	$	1,212	$	1,212	Level 1
Interest rate swaps	$	34	$	34	Level 2	$	—	$	—	Level 2
Liabilities:
Accounts payable and accrued expenses(1)	$	13,465	$	13,465	Level 1	$	44,733	$	44,733	Level 1
Interest rate swaps	$	3,915	$	3,915	Level 2	$	8,169	$	8,169	Level 2
Debt, net	$	1,703,586	$	1,731,584	Level 2	$	2,020,475	$	2,027,436	Level 2

⁽¹⁾  For the periods presented, the carrying value of these financial instruments approximates estimated fair value due to their short-term maturity.

Piedmont's debt was carried at book value as of September 30, 2017 and December 31, 2016; however, Piedmont's estimate of its estimated fair value is disclosed in the table above. Piedmont uses widely accepted valuation techniques including discounted cash flow analysis based on the contractual terms of the debt facilities, including the period to maturity of each instrument, and uses observable market-based inputs for similar debt facilities which have transacted recently in the market. Therefore, the estimated fair values determined are considered to be based on significant other observable inputs (Level 2). Scaling adjustments are made to these inputs to make them applicable to the remaining life of Piedmont's outstanding debt. Piedmont has not changed its valuation technique for estimating the fair value of its debt.

Piedmont’s interest rate swap and forward starting interest rate swap agreements presented above, and further discussed in Note 5, are classified as “Interest rate swap” assets and liabilities in the accompanying consolidated balance sheets and were carried at estimated fair value as of September 30, 2017 and December 31, 2016. The valuation of these derivative instruments was determined using widely accepted valuation techniques including discounted cash flow analysis based on the contractual terms of the derivatives, including the period to maturity of each instrument, and uses observable market-based inputs, including interest rate curves and implied volatilities. Therefore, the estimated fair values determined are considered to be based on significant other observable inputs (Level 2). In addition, Piedmont considered both its own and the respective counterparties’ risk of nonperformance in determining the estimated fair value of its derivative financial instruments by estimating the current and potential future exposure under the derivative financial instruments that both Piedmont and the counterparties were at risk for as of the valuation date. The credit risk of Piedmont and its counterparties were factored into the calculation of the estimated fair value of the interest rate swaps; however, as of September 30, 2017 and December 31, 2016, this credit valuation adjustment did not comprise a material portion of the estimated fair value. Therefore, Piedmont believes that any unobservable inputs used to determine the estimated fair values of its derivative financial instruments are not significant to the fair value measurements in their entirety, and does not consider any of its derivative financial instruments to be Level 3 assets or liabilities.

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Impairment Loss on Real Estate Assets

9 Months Ended

Sep. 30, 2017

Real Estate [Abstract]

Impairment Loss on Real Estate Assets

Impairment Loss on Real Estate Assets

Piedmont recorded impairment loss on real estate assets for the three and nine months endedSeptember 30, 2017 and 2016, respectively, as follows (in thousands):

	Three Months Ended				Nine Months Ended
	September 30, 2017		September 30, 2016		September 30, 2017		September 30, 2016
150 West Jefferson(1)	$	—	$	—	$	—	$	8,258
9221 Corporate Boulevard (2)	—		—		—		2,692
9200 and 9211 Corporate Boulevard(3)	—		22,951		—		22,951
Total impairment loss on real estate assets(4)	$	—	$	22,951	$	—	$	33,901

⁽¹⁾  Piedmont recognized an impairment loss on real estate assets based upon the difference between the carrying value of the asset and the anticipated contract sales price, less estimated selling costs.

⁽²⁾  Piedmont, using a probability-weighted model heavily weighted towards the short-term sale of the 9221 Corporate Boulevard building in Rockville, Maryland, determined that the carrying value would not be recovered from the undiscounted future operating cash flows expected from the use of the asset and its eventual disposition. As a result, Piedmont recognized a loss on impairment of approximately $2.7 million during the nine months ended September 30, 2016 calculated as the difference between the carrying value of the asset and the anticipated contract sales price, less estimated selling costs.

⁽³⁾  Piedmont elected to sell its remaining two assets and exit the Rockville, Maryland sub-market of Washington, D.C, after selling the 9221 Corporate Boulevard building in July 2016 (mentioned above). Upon management's change in its hold period assumption for the assets from a long-term hold to a near-term sale, Piedmont recognized an impairment loss of approximately $23.0 million. The impairment loss was calculated as the difference between the carrying value of the asset and the anticipated contracted sales price, less estimated selling costs. Piedmont reclassified the properties as held for sale, recognized an impairment loss, entered into a binding contract, and subsequently sold the 9200 and 9211 Corporate Boulevard buildings during the three months ended September 30, 2016.

⁽⁴⁾  The fair value measurements used in the evaluation of the non-financial assets above are considered to be Level 1 valuations within the fair value hierarchy as defined by GAAP, as there are direct observations and transactions involving the assets by unrelated, third-party purchasers.

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Commitments and Contingencies

9 Months Ended

Sep. 30, 2017

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

Commitments and Contingencies

Commitments Under Existing Lease Agreements

Under its existing lease agreements, Piedmont may be required to fund significant tenant improvements, leasing commissions, and building improvements. In addition, certain agreements contain provisions that require Piedmont to issue corporate or property guarantees to provide funding for capital improvements or other financial obligations. Piedmont classifies its capital improvements into two categories: (i) improvements which maintain the building's existing asset value and its revenue generating capacity (“non-incremental capital expenditures”) and (ii) improvements which incrementally enhance the building's asset value by expanding its revenue generating capacity (“incremental capital expenditures”). As of September 30, 2017, commitments to fund potential non-incremental capital expenditures over the next five years for tenant improvements totaled approximately $32.1 million related to Piedmont's existing lease portfolio over the respective lease terms, the majority of which Piedmont estimates may be required to be funded over the next three years based on when the underlying leases commence. For most of Piedmont’s leases, the timing of the actual funding of these tenant improvements is largely dependent upon tenant requests for reimbursement. In some cases, these obligations may expire with the leases without further recourse to Piedmont. As of September 30, 2017, commitments for incremental capital expenditures for tenant improvements associated with executed leases totaled approximately $15.2 million.

Contingencies Related to Tenant Audits/Disputes

Certain lease agreements include provisions that grant tenants the right to engage independent auditors to audit their annual operating expense reconciliations. Such audits may result in the re-interpretation of language in the lease agreements which could result in the refund of previously recognized tenant reimbursement revenues, resulting in financial loss to Piedmont. Piedmont recorded no such reductions in reimbursement revenues related to such tenant audits/disputes during the three months endedSeptember 30, 2017 and 2016, respectively, and $0.3 million and $0 of such reductions in reimbursement revenues related to such tenant audits/disputes during the nine months endedSeptember 30, 2017 and 2016, respectively.

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Property Dispositions and Assets Held for Sale

9 Months Ended

Sep. 30, 2017

Discontinued Operations and Disposal Groups [Abstract]

Property Dispositions and Assets Held for Sale

Property Dispositions and Assets Held for Sale

Properties sold during the nine months endedSeptember 30, 2017 and 2016 did not meet the criteria to be reported as discontinued operations. The operational results for these properties prior to their sale dates are presented as continuing operations in the accompanying consolidated statements of income, and the gain/(loss) on sale is presented separately on the face of the income statement. Details of such properties sold are presented below (in thousands):

Buildings Sold	Location	Date of Sale	Gain/(Loss) on Sale			Net Sales Proceeds
1055 East Colorado Boulevard	Pasadena, California	April 21, 2016	$	29,461		$	60,076
Fairway Center II	Brea, California	April 28, 2016	$	14,405		$	33,062
1901 Main Street	Irvine, California	May 2, 2016	$	29,964		$	63,149
9221 Corporate Boulevard	Rockville, Maryland	July 27, 2016	$	(192	)	$	12,035
150 West Jefferson	Detroit, Michigan	July 29, 2016	$	(680	)	$	77,827
9200 and 9211 Corporate Boulevard	Rockville, Maryland	September 28, 2016	$	(41	)	$	12,518
Sarasota Commerce Center II	Sarasota, Florida	June 16, 2017	$	6,493		$	23,090
Two Independence Square	Washington, D.C.	July 5, 2017	$	109,516		$	352,180

Sale of the 8560 Upland Drive building

During the three months ended September 30, 2017, Piedmont sold its 72% interest in the 8560 Upland Drive building in Denver, Colorado for approximately $12.7 million which resulted in net sales proceeds of $12.3 million and a gain on sale of approximately $3.7 million, which is included in income from unconsolidated joint ventures in the accompanying consolidated statements of income.

Assets Held for Sale

In February 2017, Piedmont reclassified the Two Independence Square building from real estate assets held for use to real estate assets held for sale as a result of entering into a binding agreement to sell the property. The sale of the Two Independence Square building closed on July 5, 2017. Details of assets held for sale as of September 30, 2017 and December 31, 2016 are presented below (in thousands):

	September 30, 2017		December 31, 2016
Real estate assets held for sale, net:
Land	$	—	$	52,710
Building and improvements, less accumulated depreciation of $0 and $88,319 as of September 30, 2017 and December 31, 2016, respectively	—		173,218
Construction in progress	—		11
Total real estate assets held for sale, net	$	—	$	225,939
Other assets held for sale, net:
Straight-line rent receivables	$	—	$	2,059
Prepaid expenses and other assets	—		454
Deferred lease costs, less accumulated amortization of $0 and $2,825 as of September 30, 2017 and December 31, 2016, respectively	—		7,302
Total other assets held for sale, net	$	—	$	9,815

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Stock Based Compensation

9 Months Ended

Sep. 30, 2017

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

Stock Based Compensation

Stock Based Compensation

The Compensation Committee of Piedmont's Board of Directors has periodically granted deferred stock awards to all of Piedmont's employees and independent directors. Employee awards typically vest ratably over a multi-year period and independent director awards vest over one year. Certain employees' long-term equity incentive program is split equally between the time-vested awards described above and a multi-year performance share program whereby awards may be earned based upon Piedmont's total stockholder return ("TSR") relative to a peer group's TSR. The peer group is predetermined by the Board of Directors. Any shares earned are awarded at the end of the multi-year performance period and vest upon award.

A rollforward of Piedmont's equity based award activity for the nine months endedSeptember 30, 2017 is as follows:

	Shares		Weighted-Average Grant Date Fair Value
Unvested Stock Awards as of December 31, 2016	944,223		$	19.44
Deferred Stock Awards Granted	299,251		$	21.38
Change in Estimated Potential Future Performance Share Awards, net of forfeitures	(7,828	)	$	23.65
Performance Stock Awards Vested	(118,446	)	$	22.00
Deferred Stock Awards Vested	(302,474	)	$	19.35
Deferred Stock Awards Forfeited	(7,200	)	$	19.79
Unvested Stock Awards as of September 30, 2017	807,526		$	21.39

The following table provides additional information regarding stock award activity during the three and nine months endedSeptember 30, 2017 and 2016, respectively (in thousands, except per share amounts):

	Three Months Ended				Nine Months Ended
	September 30, 2017		September 30, 2016		September 30, 2017		September 30, 2016
Weighted-Average Grant Date Fair Value of Deferred Stock Granted During the Period	$	—	$	—	$	21.38	$	19.96
Total Grant Date Fair Value of Deferred Stock Vested During the Period	$	11	$	108	$	5,852	$	4,766
Share-based Liability Awards Paid During the Period(1)	$	—	$	—	$	2,877	$	1,127

⁽¹⁾  Amounts reflect the issuance of performance share awards related to the 2014-16 and 2013-15 Performance Share Plans during the nine months endedSeptember 30, 2017 and 2016, respectively.

A detail of Piedmont’s outstanding stock awards as of September 30, 2017 is as follows:

Date of grant	Type of Award	Net Shares Granted (1)	Grant Date Fair Value		Vesting Schedule	Unvested Shares as of September 30, 2017
January 3, 2014	Deferred Stock Award	86,769	$	16.56	Of the shares granted, 20% vested or will vest on January 3, 2015, 2016, 2017, 2018, and 2019, respectively.	35,094
May 1, 2015	Deferred Stock Award	216,837	$	17.59	Of the shares granted, 25% vested on the date of grant, and 25% vested or will vest on May 1, 2016, 2017, and 2018, respectively.	67,114
May 1, 2015	Fiscal Year 2015-2017 Performance Share Program	—	$	18.42	Shares awarded, if any, will vest immediately upon determination of award in 2018.	143,846	(2)
May 24, 2016	Deferred Stock Award	233,011	$	19.91	Of the shares granted, 25% vested on the date of grant, and 25% vested or will vest on May 24, 2017, 2018, and 2019, respectively.	133,092
May 24, 2016	Fiscal Year 2016-2018 Performance Share Program	—	$	23.02	Shares awarded, if any, will vest immediately upon determination of award in 2019.	103,790	(2)
May 18, 2017	Deferred Stock Award-Board of Directors	26,187	$	21.38	Of the shares granted, 100% will vest by May 18, 2018.	26,187
May 18, 2017	Deferred Stock Award	246,740	$	21.38	Of the shares granted, 25% vested on the date of grant, and 25% vested or will vest on May 18, 2018, 2019, and 2020, respectively.	200,899
May 18, 2017	Fiscal Year 2017-2019 Performance Share Program	—	$	30.45	Shares awarded, if any, will vest immediately upon determination of award in 2020.	97,504	(2)
Total						807,526

⁽¹⁾  Amounts reflect the total grant to employees and independent directors, net of shares surrendered upon vesting to satisfy required minimum tax withholding obligations through September 30, 2017.

⁽²⁾  Estimated based on Piedmont's cumulative TSR for the respective performance period through September 30, 2017. Share estimates are subject to change in future periods based upon Piedmont's relative performance compared to its peers' total stockholder return.

During the three months endedSeptember 30, 2017 and 2016, Piedmont recognized approximately $1.3 million and $2.0 million of compensation expense related to stock awards, all of which is related to the amortization of unvested shares. During the nine months endedSeptember 30, 2017 and 2016, Piedmont recognized approximately $7.0 million and $7.7 million of compensation expense related to stock awards, of which $5.2 million and $6.2 million related to the amortization of unvested shares, respectively. During the nine months endedSeptember 30, 2017, a net total of 254,873 shares were issued to employees and independent directors. As of September 30, 2017, approximately $5.1 million of unrecognized compensation cost related to unvested deferred stock awards remained, which Piedmont will record in its consolidated statements of income over a weighted-average vesting period of approximately one year.

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Earnings Per Share

9 Months Ended

Sep. 30, 2017

Earnings Per Share [Abstract]

Earnings Per Share

Earnings Per Share

There are no adjustments to “Net income applicable to Piedmont” for the diluted earnings per share computations. Adjustments to the carrying amount of non-controlling interest as a result of the measurement of a redeemable equity participation do not impact net income or comprehensive income; rather such adjustments are treated as the repurchase of a non-controlling interest.

Net income per share-basic is calculated as net income available to common stockholders divided by the weighted average number of common shares outstanding during the period. Net income per share-diluted is calculated as net income available to common stockholders divided by the diluted weighted average number of common shares outstanding during the period, including unvested deferred stock awards. Diluted weighted average number of common shares reflects the potential dilution under the treasury stock method that would occur if the remaining unvested deferred stock awards vested and resulted in additional common shares outstanding. Unvested deferred stock awards which are determined to be anti-dilutive are not included in the calculation of diluted weighted average common shares.

The following table reconciles the denominator for the basic and diluted earnings per share computations shown on the consolidated statements of income for the three and nine months endedSeptember 30, 2017 and 2016, respectively (in thousands):

	Three Months Ended		Nine Months Ended
	September 30, 2017	September 30, 2016	September 30, 2017	September 30, 2016
Weighted-average common shares – basic	145,416	145,231	145,372	145,229
Plus: Incremental weighted-average shares from time-vested deferred and performance stock awards	303	438	308	372
Weighted-average common shares – diluted	145,719	145,669	145,680	145,601
Common stock issued and outstanding as of period end			145,295	145,234

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Guarantor and Non-Guarantor Financial Information

9 Months Ended

Sep. 30, 2017

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Guarantor and Non-Guarantor Financial Information

Guarantor and Non-Guarantor Financial Information

The following condensed consolidating financial information for Piedmont Operating Partnership, L.P. (the "Issuer"), Piedmont Office Realty Trust, Inc. (the "Guarantor"), and the other directly and indirectly owned subsidiaries of the Guarantor (the "Non-Guarantor Subsidiaries") is provided pursuant to the requirements of Rule 3-10 of Regulation S-X regarding financial statements of guarantors and issuers of guaranteed registered securities. The Issuer is a wholly-owned subsidiary of the Guarantor, and all guarantees by the Guarantor of securities issued by the Issuer are full and unconditional. The principal elimination entries relate to investments in subsidiaries and intercompany balances and transactions, including transactions with the Non-Guarantor Subsidiaries.

Condensed Consolidated Balance Sheets
As of September 30, 2017
(in thousands)	Issuer		Guarantor			Non-Guarantor Subsidiaries		Eliminations			Consolidated
Assets:
Real estate assets, at cost:
Land	$	43,929	$	—		$	571,005	$	—		$	614,934
Buildings and improvements, less accumulated depreciation	206,700		—			2,516,763		(300		)	2,723,163
Intangible lease assets, less accumulated amortization	317		—			78,383		—			78,700
Construction in progress	797		—			8,160		—			8,957
Total real estate assets	251,743		—			3,174,311		(300		)	3,425,754
Investments in and amounts due from unconsolidated joint ventures	49		—			—		—			49
Cash and cash equivalents	25,884		150			10,074		—			36,108
Tenant and straight-line rent receivables, net	17,556		—			177,855		—			195,411
Advances to affiliates	6,257,405		1,576,739			—		(7,834,144		)	—
Investment in subsidiary	—		3,538,945			177		(3,539,122		)	—
Notes receivable	88,910		—			144,500		(233,410		)	—
Prepaid expenses, restricted cash, escrows, and other assets	4,905		38			25,358		(809		)	29,492
Goodwill	98,918		—			—		—			98,918
Interest rate swaps	34		—			—		—			34
Deferred lease costs, net	13,927		—			260,957		—			274,884
Total assets	$	6,759,331	$	5,115,872		$	3,793,232	$	(11,607,785	)	$	4,060,650
Liabilities:
Debt, net	$	1,511,587	$	—		$	425,409	$	(233,410	)	$	1,703,586
Accounts payable, accrued expenses, and accrued capital expenditures	16,546		652			91,731		(809		)	108,120
Advances from affiliates	790,748		5,226,546			1,915,105		(7,932,399		)	—
Deferred income	3,728		—			26,242		—			29,970
Intangible lease liabilities, net	—		—			41,064		—			41,064
Interest rate swaps	3,915		—			—		—			3,915
Total liabilities	2,326,524		5,227,198			2,499,551		(8,166,618		)	1,886,655
Stockholders’ Equity:
Common stock	—		1,453			—		—			1,453
Additional paid-in capital	3,534,946		3,679,578			1,304		(3,539,122		)	3,676,706
Retained/(cumulative distributions in excess of) earnings	892,461		(3,792,357		)	1,290,513		97,955			(1,511,428		)
Other comprehensive loss	5,400		—			—		—			5,400
Piedmont stockholders’ equity	4,432,807		(111,326		)	1,291,817		(3,441,167		)	2,172,131
Noncontrolling interest	—		—			1,864		—			1,864
Total stockholders’ equity	4,432,807		(111,326		)	1,293,681		(3,441,167		)	2,173,995
Total liabilities and stockholders’ equity	$	6,759,331	$	5,115,872		$	3,793,232	$	(11,607,785	)	$	4,060,650

Condensed Consolidated Balance Sheets
As of December 31, 2016
(in thousands)	Issuer		Guarantor			Non-Guarantor Subsidiaries		Eliminations			Consolidated
Assets:
Real estate assets, at cost:
Land	$	46,133	$	—		$	571,005	$	—		$	617,138
Buildings and improvements, less accumulated depreciation	228,194		—			2,526,212		(300		)	2,754,106
Intangible lease assets, less accumulated amortization	725		—			98,970		—			99,695
Construction in progress	145		—			34,669		—			34,814
Real estate assets held for sale, net	—		—			225,939		—			225,939
Total real estate assets	275,197		—			3,456,795		(300		)	3,731,692
Investments in and amounts due from unconsolidated joint ventures	7,360		—			—		—			7,360
Cash and cash equivalents	3,674		150			3,168		—			6,992
Tenant and straight-line rent receivables, net	20,159		—			170,124		—			190,283
Advances to affiliates	6,464,135		1,315,616			—		(7,779,751		)	—
Investment in subsidiary	—		3,630,564			181		(3,630,745		)	—
Notes receivable	88,910		—			95,790		(184,700		)	—
Prepaid expenses, restricted cash, escrows, and other assets	6,189		—			20,121		(1,897		)	24,413
Goodwill	98,918		—			—		—			98,918
Deferred lease costs, net	16,550		—			282,145		—			298,695
Other assets held for sale, net	—		—			9,815		—			9,815
Total assets	$	6,981,092	$	4,946,330		$	4,038,139	$	(11,597,393	)	$	4,368,168
Liabilities:
Debt, net	$	1,701,933	$	—		$	503,242	$	(184,700	)	$	2,020,475
Accounts payable, accrued expenses, and accrued capital expenditures	17,365		31,230			118,712		(1,897		)	165,410
Advances from affiliates	708,340		5,071,521			2,098,146		(7,878,007		)	—
Deferred income	5,206		—			23,200		—			28,406
Intangible lease liabilities, net	—		—			48,005		—			48,005
Interest rate swaps	8,169		—			—		—			8,169
Total liabilities	2,441,013		5,102,751			2,791,305		(8,064,604		)	2,270,465
Stockholders’ Equity:
Common stock	—		1,452			—		—			1,452
Additional paid-in capital	3,626,564		3,676,000			1,309		(3,630,745		)	3,673,128
Retained/(cumulative distributions in excess of) earnings	911,411		(3,833,873		)	1,243,643		97,956			(1,580,863		)
Other comprehensive income	2,104		—			—		—			2,104
Piedmont stockholders’ equity	4,540,079		(156,421		)	1,244,952		(3,532,789		)	2,095,821
Noncontrolling interest	—		—			1,882		—			1,882
Total stockholders’ equity	4,540,079		(156,421		)	1,246,834		(3,532,789		)	2,097,703
Total liabilities and stockholders’ equity	$	6,981,092	$	4,946,330		$	4,038,139	$	(11,597,393	)	$	4,368,168

Condensed Consolidated Statements of Income
For the three months ended September 30, 2017
(in thousands)	Issuer			Guarantor			Non-Guarantor Subsidiaries			Eliminations			Consolidated
Revenues:
Rental income	$	10,232		$	—		$	103,544		$	(426	)	$	113,350
Tenant reimbursements	2,376			—			21,562			(142		)	23,796
Property management fee revenue	—			—			4,553			(4,112		)	441
	12,608			—			129,659			(4,680		)	137,587
Expenses:
Property operating costs	5,372			—			53,398			(4,680		)	54,090
Depreciation	3,199			—			26,801			—			30,000
Amortization	740			—			17,383			—			18,123
General and administrative	1,539			77			5,002			—			6,618
	10,850			77			102,584			(4,680		)	108,831
Real estate operating income/(loss)	1,758			(77		)	27,075			—			28,756
Other income (expense):
Interest expense	(13,795		)	—			(6,354		)	3,966			(16,183		)
Other income/(expense)	2,404			—			1,852			(3,966		)	290
Equity in income of unconsolidated joint ventures	3,754			—			—			—			3,754
	(7,637		)	—			(4,502		)	—			(12,139		)
Income/(loss) from continuing operations	(5,879		)	(77		)	22,573			—			16,617
Discontinued operations:
Operating income	—			—			—			—			—
Income from discontinued operations	—			—			—			—			—
Gain/(loss) on sale of real estate assets, net	(4		)	—			109,516			—			109,512
Net income/(loss)	(5,883		)	(77		)	132,089			—			126,129
Plus: Net income applicable to noncontrolling interest	—			—			4			—			4
Net income/(loss) applicable to Piedmont	$	(5,883	)	$	(77	)	$	132,093		$	—		$	126,133

Condensed Consolidated Statements of Income
For the three months ended September 30, 2016
(in thousands)	Issuer			Guarantor			Non-Guarantor Subsidiaries			Eliminations			Consolidated
Revenues:
Rental income	$	12,862		$	—		$	101,423		$	(464	)	$	113,821
Tenant reimbursements	3,430			—			20,970			(237		)	24,163
Property management fee revenue	—			—			3,985			(3,484		)	501
	16,292			—			126,378			(4,185		)	138,485
Expenses:
Property operating costs	7,820			—			51,287			(4,240		)	54,867
Depreciation	3,617			—			27,993			—			31,610
Amortization	863			—			17,777			—			18,640
Impairment loss on real estate assets	—			—			22,951			—			22,951
General and administrative	7,187			83			9,016			(8,857		)	7,429
	19,487			83			129,024			(13,097		)	135,497
Real estate operating income/(loss)	(3,195		)	(83		)	(2,646		)	8,912			2,988
Other income (expense):
Interest expense	(11,799		)	—			(6,949		)	3,252			(15,496		)
Other income/(expense)	2,608			—			(76		)	(3,252		)	(720		)
Net recoveries from casualty events	—			—			34			—			34
Equity in income of unconsolidated joint ventures	129			—			—			—			129
	(9,062		)	—			(6,991		)	—			(16,053		)
Income/(loss) from continuing operations	(12,257		)	(83		)	(9,637		)	8,912			(13,065		)
Discontinued operations:
Operating income	—			—			1			—			1
Income from discontinued operations	—			—			1			—			1
Gain/(loss) on sale of real estate assets, net	134			—			(191		)	—			(57		)
Net income/(loss)	(12,123		)	(83		)	(9,827		)	8,912			(13,121		)
Plus: Net income applicable to noncontrolling interest	—			—			14			—			14
Net income/(loss) applicable to Piedmont	$	(12,123	)	$	(83	)	$	(9,813	)	$	8,912		$	(13,107	)

Condensed Consolidated Statements of Income
For the nine months ended September 30, 2017
(in thousands)	Issuer			Guarantor			Non-Guarantor Subsidiaries			Eliminations			Consolidated
Revenues:
Rental income	$	32,749		$	—		$	329,669		$	(1,370	)	$	361,048
Tenant reimbursements	8,341			—			64,372			(373		)	72,340
Property management fee revenue	—			—			13,753			(12,412		)	1,341
	41,090			—			407,794			(14,155		)	434,729
Expenses:
Property operating costs	17,027			—			162,381			(14,155		)	165,253
Depreciation	9,943			—			80,884			—			90,827
Amortization	2,399			—			55,453			—			57,852
General and administrative	4,798			261			18,191			—			23,250
	34,167			261			316,909			(14,155		)	337,182
Real estate operating income/(loss)	6,923			(261		)	90,885			—			97,547
Other income (expense):
Interest expense	(43,049		)	—			(20,868		)	11,256			(52,661		)
Other income/(expense)	6,873			—			4,611			(11,256		)	228
Equity in income of unconsolidated joint ventures	3,872			—			—			—			3,872
	(32,304		)	—			(16,257		)	—			(48,561		)
Income/(loss) from continuing operations	(25,381		)	(261		)	74,628			—			48,986
Discontinued operations:
Operating income	—			—			—			—			—
Income from discontinued operations	—			—			—			—			—
Gain on sale of real estate assets, net	6,430			—			109,521			—			115,951
Net income/(loss)	(18,951		)	(261		)	184,149			—			164,937
Plus: Net income applicable to noncontrolling interest	—			—			10			—			10
Net income/(loss) applicable to Piedmont	$	(18,951	)	$	(261	)	$	184,159		$	—		$	164,947

Condensed Consolidated Statements of Income
For the nine months ended September 30, 2016
(in thousands)	Issuer			Guarantor			Non-Guarantor Subsidiaries			Eliminations			Consolidated
Revenues:
Rental income	$	42,990		$	—		$	299,319		$	(1,983	)	$	340,326
Tenant reimbursements	10,455			—			59,950			(405		)	70,000
Property management fee revenue	—			—			12,480			(11,002		)	1,478
	53,445			—			371,749			(13,390		)	411,804
Expenses:
Property operating costs	24,583			—			150,369			(13,514		)	161,438
Depreciation	12,993			—			81,955			—			94,948
Amortization	2,854			—			50,994			—			53,848
Impairment loss of real estate assets	8,259			—			25,642			—			33,901
General and administrative	22,802			251			28,881			(28,416		)	23,518
	71,491			251			337,841			(41,930		)	367,653
Real estate operating income/(loss)	(18,046		)	(251		)	33,908			28,540			44,151
Other income (expense):
Interest expense	(36,159		)	—			(20,354		)	8,219			(48,294		)
Other income/(expense)	7,008			282			462			(8,219		)	(467		)
Net recoveries from casualty events	—			—			34			—			34
Equity in income of unconsolidated joint ventures	354			—			—			—			354
	(28,797		)	282			(19,858		)	—			(48,373		)
Net income/(loss)	(46,843		)	31			14,050			28,540			(4,222		)
Discontinued operations:
Operating income	—			—			—			—			—
Income from discontinued operations	—			—			—			—			—
Gain on sale of real estate assets, net	30,096			—			43,662			—			73,758
Net income/(loss)	(16,747		)	31			57,712			28,540			69,536
Plus: Net income applicable to noncontrolling interest	—			—			7			—			7
Net income/(loss) applicable to Piedmont	$	(16,747	)	$	31		$	57,719		$	28,540		$	69,543

Condensed Consolidated Statements of Cash Flows
For the nine months ended September 30, 2017
(in thousands)	Issuer			Guarantor			Non-Guarantor Subsidiaries			Eliminations			Consolidated
Net Cash Provided by/(Used in) Operating Activities	$	(15,467	)	$	4,335		$	187,464		$	—		$	176,332
Cash Flows from Investing Activities:
Investment in real estate assets and real estate related intangibles, net of accruals	(793		)	—			(64,614		)	—			(65,407		)
Intercompany note receivable	—			—			(48,710		)	48,710			—
Net sales proceeds from wholly-owned properties	23,028			—			352,171			—			375,199
Net sales proceeds received from unconsolidated joint ventures	12,334			—			—			—			12,334
Investments in unconsolidated joint ventures	(1,162		)	—			—			—			(1,162		)
Deferred lease costs paid	(858		)	—			(18,561		)	—			(19,419		)
Net cash provided by investing activities	32,549			—			220,286			48,710			301,545
Cash Flows from Financing Activities:
Debt issuance costs paid	(102		)	—			1			—			(101		)
Proceeds from debt	147,000			—			—			—			147,000
Repayments of debt	(325,000		)	—			(141,046		)	—			(466,046		)
Intercompany note payable	(14,289		)	—			62,999			(48,710		)	—
Costs of issuance of common stock	—			(97		)	—			—			(97		)
Value of shares withheld to pay tax obligations related to employee stock compensation	—			(3,385		)	—			—			(3,385		)
Repurchases of common stock as part of announced plan	—			(3,895		)	—			—			(3,895		)
(Distributions to)/repayments from affiliates	197,519			125,271			(322,790		)	—			—
Dividends paid and discount on dividend reinvestments	—			(122,229		)	(8		)	—			(122,237		)
Net cash used in financing activities	5,128			(4,335		)	(400,844		)	(48,710		)	(448,761		)
Net increase in cash and cash equivalents	22,210			—			6,906			—			29,116
Cash and cash equivalents, beginning of period	3,674			150			3,168			—			6,992
Cash and cash equivalents, end of period	$	25,884		$	150		$	10,074		$	—		$	36,108

Condensed Consolidated Statements of Cash Flows
For the nine months ended September 30, 2016
(in thousands)	Issuer			Guarantor			Non-Guarantor Subsidiaries			Eliminations			Consolidated
Net Cash Provided by/(Used in) Operating Activities	$	(18,977	)	$	4,121		$	158,352		$	28,540		$	172,036
Cash Flows from Investing Activities:
Investment in real estate assets, consolidated joint venture, and real estate related intangibles, net of accruals	(24,255		)	—			(296,884		)	—			(321,139		)
Intercompany note receivable	440			—			(71,900		)	71,460			—
Net sales proceeds from wholly-owned properties	187,192			—			117,710			—			304,902
Deferred lease costs paid	(2,021		)	—			(13,324		)	—			(15,345		)
Net cash provided by/(used in) investing activities	161,356			—			(264,398		)	71,460			(31,582		)
Cash Flows from Financing Activities:
Debt issuance costs paid	(212		)	—			—			—			(212		)
Proceeds from debt	552,000			—			—			—			552,000
Repayments of debt	(421,000		)	—			(168,532		)	—			(589,532		)
Intercompany note payable	(9,600		)	—			81,060			(71,460		)	—
Costs of issuance of common stock	—			(239		)	—			—			(239		)
Value of shares withheld to pay tax obligations related to employee stock compensation	—			(2,328		)	—			—			(2,328		)
Repurchases of common stock as part of announced plan	—			(7,943		)	—			—			(7,943		)
(Distributions to)/repayments from affiliates	(262,150		)	97,990			192,700			(28,540		)	—
Dividends paid and discount on dividend reinvestments	—			(91,601		)	(8		)	—			(91,609		)
Net cash provided by/(used in) financing activities	(140,962		)	(4,121		)	105,220			(100,000		)	(139,863		)
Net increase/(decrease) in cash and cash equivalents	1,417			—			(826		)	—			591
Cash and cash equivalents, beginning of period	2,174			150			3,117			—			5,441
Cash and cash equivalents, end of period	$	3,591		$	150		$	2,291		$	—		$	6,032

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Subsequent Events

9 Months Ended

Sep. 30, 2017

Subsequent Events [Abstract]

Subsequent Events

Subsequent Events

Fourth Quarter Dividend Declaration

On October 31, 2017, the Board of Directors of Piedmont declared dividends for the fourth quarter 2017 in the amount of $0.21 per common share outstanding to stockholders of record as of the close of business on November 24, 2017. Such dividends are to be paid on January 4, 2018.

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Summary of Significant Accounting Policies (Policies)

9 Months Ended

Sep. 30, 2017

Accounting Policies [Abstract]

Basis of Presentation

The consolidated financial statements of Piedmont have been prepared in accordance with the rules and regulations of the Securities and Exchange Commission (the “SEC”), including the instructions to Form 10-Q and Article 10 of Regulation S-X, and do not include all of the information and footnotes required by GAAP for complete financial statements. In the opinion of management, the statements for the unaudited interim periods presented include all adjustments, which are of a normal and recurring nature, necessary for a fair presentation of the results for such periods. Results for these interim periods are not necessarily indicative of a full year’s results.

Principles of Consolidation

Piedmont’s consolidated financial statements include the accounts of Piedmont, Piedmont’s wholly-owned subsidiaries, any variable interest entity ("VIE") for which Piedmont or any of its wholly-owned subsidiaries is considered to have the power to direct the activities of the entity and the obligation to absorb losses/right to receive benefits, or any entity in which Piedmont or any of its wholly-owned subsidiaries owns a controlling interest. In determining whether Piedmont or Piedmont OP has a controlling interest, the following factors, among others, are considered: equity ownership, voting rights, protective rights of investors, and participatory rights of investors. For further information, refer to the financial statements and footnotes included in Piedmont’s Amended Annual Report on Form 10-K/A for the year ended December 31, 2016.

All intercompany balances and transactions have been eliminated upon consolidation.

Further, Piedmont has formed special purpose entities to acquire and hold real estate. Each special purpose entity is a separate legal entity. Consequently, the assets of these special purpose entities are not available to all creditors of Piedmont. The assets owned by these special purpose entities are being reported on a consolidated basis with Piedmont’s assets for financial reporting purposes only.

Use of Estimates

Use of Estimates

The preparation of the accompanying consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the amounts reported in the accompanying consolidated financial statements and notes. Actual results could differ from those estimates.

Income Taxes

Income Taxes

Piedmont has elected to be taxed as a REIT under the Internal Revenue Code of 1986, as amended, and has operated as such, beginning with its taxable year ended December 31, 1998. To qualify as a REIT, Piedmont must meet certain organizational and operational requirements, including a requirement to distribute at least 90% of its annual REIT taxable income. As a REIT, Piedmont is generally not subject to federal income taxes, subject to fulfilling, among other things, this distribution requirement. Piedmont is subject to certain taxes related to the operations of properties in certain locations, as well as operations conducted by its taxable REIT subsidiary, POH, which have been provided for in the financial statements.

Reclassifications

Reclassifications

Certain prior period amounts presented in Piedmont's Amended Annual Report on Form 10-K/A for the year ended December 31, 2016 have been reclassified to conform to the current period financial statement presentation. The reclassifications relate to the Two Independence Square building, located in Washington, D.C., which was first classified as held for sale as of March 31, 2017, and was sold on July 5, 2017. Applicable balances related to the same asset remain classified as held for sale as of December 31, 2016.

Recent Accounting Pronouncements

Recent Accounting Pronouncements

The Financial Accounting Standards Board (the "FASB") has issued Accounting Standards Update No. 2014-09, Revenue from Contracts with Customers (Topic 606) ("ASU 2014-09") and Accounting Standards Update No. 2016-08, Revenue from Contracts with Customers (Topic 606) Principal versus Agent Considerations (Reporting Revenue Gross versus Net) ("ASU 2016-08"). The amendments in ASU 2014-09, which are further clarified in ASU 2016-08, as well as Accounting Standards Update 2016-10, Accounting Standards Update 2016-12, and Accounting Standards Update 2016-20 (collectively the "Revenue Recognition Amendments"), change the criteria for the recognition of certain revenue streams to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services using a five-step determination process. Steps 1 through 5 involve (i) identifying contracts with a customer, (ii) identifying the performance obligations in the contract, (iii) determining the transaction price, (iv) allocating the transaction price to the performance obligations, and (v) recognizing revenue as an entity satisfies a performance obligation. The revenues impacted by the Revenue Recognition Amendments include a portion of Piedmont's tenant reimbursement revenues and property management fee revenues. Lease contracts and reimbursement revenues associated with property taxes and insurance are specifically excluded from the Revenue Recognition Amendments. The Revenue Recognition Amendments are effective in the first quarter of 2018 for Piedmont. Management has substantially completed its initial assessment of the impact of adoption of the Revenue Recognition Amendments. Approximately 90% of Piedmont's total revenues are derived from either long-term leases with its tenants or reimbursement of property tax and insurance expenses, which are excluded from the scope of the Revenue Recognition Amendments. In addition, based on management's assessment to date, Piedmont does not expect the timing of the recognition of reimbursement revenue and revenue from management agreements to change as a result of the new guidance, though certain classifications will change between rental revenue and tenant reimbursements. Finally, management has determined, and the FASB has confirmed, that the evaluation of non-lease components under the new Revenue Recognition Amendments will not be effective until Accounting Standards Update No. 2016-02, Leases (Topic 842), ("ASU 2016-02") becomes effective (see further discussion below), which will be first quarter of 2019 for Piedmont. Although management continues to evaluate the guidance and disclosures required by the Revenue Recognition Amendments, Piedmont does not anticipate any material impact to its consolidated financial statements as a result of adoption.

The FASB has issued Accounting Standards Update No. 2017-05, Other Income—Gains and Losses from the Derecognition of Nonfinancial Assets (Subtopic 610-20): Clarifying the Scope of Asset Derecognition Guidance and Accounting for Partial Sales of Nonfinancial Assets ("ASU 2017-05"). The provisions of ASU 2017-05 define the term "in substance nonfinancial asset" as a financial asset promised to a counterparty in a contract if substantially all of the fair value of the assets (recognized and unrecognized) is concentrated in nonfinancial assets. Further, it states that nonfinancial assets should be derecognized once the counterparty obtains control. Finally, the amendments provide clarification for partial sales of nonfinancial assets. ASU 2017-05 is effective concurrent with the Revenue Recognition Amendments (detailed above), which will be the first quarter of 2018 for Piedmont. Although management continues to evaluate the guidance and disclosures required by ASU 2017-05, Piedmont does not anticipate a material change in how it recognizes, measures, and classifies the gain or loss on the disposition of real estate in its consolidated financial statements as a result of adoption.

The FASB has issued Accounting Standards Update No. 2016-01, Financial Instruments - Overall (Subtopic 825-10), Recognition and Measurement of Financial Assets and Financial Liabilities ("ASU 2016-01"). The amendments in ASU 2016-01 require equity investments, except those accounted for under the equity method of accounting, to be measured at estimated fair value with changes in fair value recognized in net income. Additionally, ASU 2016-01 simplifies the impairment assessment of equity investments, and eliminates certain disclosure requirements. The amendments in ASU 2016-01 are effective in the first quarter of 2018, and Piedmont does not anticipate any material impact to its consolidated financial statements as a result of adoption.

The FASB has issued Accounting Standards Update No. 2016-18, Statement of Cash Flows (Topic 230),Restricted Cash (a consensus of the FASB Emerging Issues Task Force) ("ASU 2016-18"). The provisions of ASU 2016-18 require entities to show changes in restricted cash and cash equivalents in addition to cash and cash equivalents in the statement of cash flows. As a result, entities will no longer present transfers between restricted and unrestricted cash in the statement of cash flows. Disclosures are required to reconcile the amount presented on the statement of cash flows to the balance sheet, as well as disclosing the nature of restriction on the restricted cash balances. ASU 2016-18 is effective for Piedmont in the first quarter of 2018, with early adoption permitted. Piedmont does not anticipate any material impact to its consolidated financial statements as a result of adoption.

The FASB has issued ASU 2016-02, which fundamentally changes the definition of a lease, as well as the accounting for operating leases by requiring lessees to recognize assets and liabilities which arise from the lease, consisting of a liability to make lease payments (the lease liability) and a right-of-use asset, representing the right to use the leased asset over the term of the lease. Accounting for leases by lessors is substantially unchanged from prior practice as lessors will continue to recognize lease revenue on a straight-line basis; however, ASU 2016-02 defines certain tenant reimbursements as non-lease components which will be subject to the guidance under ASU 2014-09. The amendments in ASU 2016-02 are effective in the first quarter of 2019, and Piedmont is currently evaluating the potential impact of adoption.

The FASB has issued Accounting Standards Update No. 2016-13, Financial Instruments—Credit Losses (Topic 326),Measurement of Credit Losses on Financial Instruments ("ASU 2016-13"). The provisions of ASU 2016-13 replace the "incurred loss" approach with an "expected loss" model for impairing trade and other receivables, held-to-maturity debt securities, net investment in leases, and off-balance-sheet credit exposures, which will generally result in earlier recognition of allowances for credit losses. Additionally, the provisions change the classification of credit losses related to available-for-sale securities to an allowance, rather than a direct reduction of the amortized cost of the securities. ASU 2016-13 is effective in the first quarter of 2020, with early adoption permitted as of January 1, 2019. Piedmont is currently evaluating the potential impact of adoption.

The FASB has issued Accounting Standards Update No. 2017-04, Intangibles—Goodwill and Other (Topic 350),Simplifying the Test for Goodwill Impairment ("ASU 2017-04"). The provisions of ASU 2017-04 simplify how an entity is required to test goodwill for impairment by eliminating Step 2 from the goodwill impairment test, which is generally performed annually unless events or circumstances arise which would necessitate evaluating the carrying value for impairment in the interim. Step 2 measures a goodwill impairment loss by comparing the implied fair value of a entity’s goodwill with the carrying amount of that goodwill by determining the fair value of its assets and liabilities (including unrecognized assets and liabilities) following the procedures that would be required in a business combination. Under the provisions of ASU 2017-04, an entity would instead recognize an impairment charge for the amount by which the carrying amount exceeds the entity’s fair value; however, the loss recognized should not exceed the total amount of goodwill allocated to that entity. ASU 2017-04 is effective in the first quarter of 2020, with early adoption permitted as of the first interim or annual impairment test of goodwill after January 1, 2017. Piedmont is currently evaluating the potential impact of adoption.

Risk Management Objective of Using Derivatives

Risk Management Objective of Using Derivatives

In addition to operational risks which arise in the normal course of business, Piedmont is exposed to economic risks such as interest rate, liquidity, and credit risk. In certain situations, Piedmont has entered into derivative financial instruments such as interest rate swap agreements and other similar agreements to manage interest rate risk exposure arising from current or future variable rate debt transactions. Interest rate swap agreements involve the receipt or payment of future known and uncertain cash amounts, the value of which are determined by interest rates. Piedmont’s objective in using interest rate derivatives is to add stability to interest expense and to manage its exposure to interest rate movements.

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Debt (Tables)

9 Months Ended

Sep. 30, 2017

Debt Disclosure [Abstract]

Schedule of Debt

The following table summarizes the terms of Piedmont’s indebtedness outstanding as of September 30, 2017 and December 31, 2016 (in thousands):

Facility (1)	Stated Rate		Effective Rate (2)			Maturity		Amount Outstanding as of
								September 30, 2017		December 31, 2016
Secured (Fixed)
$140 Million WDC Fixed-Rate Loans	5.76	%	5.76	%		11/1/2017		$	—	$	140,000
$35 Million Fixed-Rate Loan (3)	5.55	%	3.75	%		9/1/2021		30,903		31,583
$160 Million Fixed-Rate Loan (4)	3.48	%	3.58	%		7/5/2022		160,000		160,000
Net premium and unamortized debt issuance costs								1,020		1,161
Subtotal/Weighted Average (5)	3.82	%						191,923		332,744
Unsecured (Variable and Fixed)
$170 Million Unsecured 2015 Term Loan (6)	LIBOR + 1.125%		2.37	%		5/15/2018		170,000		170,000
$300 Million Unsecured 2013 Term Loan	LIBOR + 1.20%		2.78	%	(7)	1/31/2019		300,000		300,000
$500 Million Unsecured 2015 Line of Credit (6)	LIBOR + 1.00%		—	%		6/18/2019	(8)	—		178,000
$300 Million Unsecured 2011 Term Loan	LIBOR +  1.15%		3.35	%	(7)	1/15/2020		300,000		300,000
$350 Million Senior Notes	3.40	%	3.43	%		6/01/2023		350,000		350,000
$400 Million Senior Notes	4.45	%	4.10	%		3/15/2024		400,000		400,000
Discounts and unamortized debt issuance costs								(8,337)		(10,269)
Subtotal/Weighted Average (5)	3.43	%						1,511,663		1,687,731
Total/Weighted Average (5)	3.47	%						$	1,703,586	$	2,020,475

⁽¹⁾  Other than the $35 Million Fixed-Rate Loan, all of Piedmont’s outstanding debt as of September 30, 2017 and December 31, 2016 is interest-only.

⁽²⁾  Effective rate after consideration of settled or in-place interest rate swap agreements, issuance premiums/discounts, and/or fair market value adjustments upon assumption of debt.

⁽³⁾  Collateralized by the 5 Wall Street building in Burlington, Massachusetts.

⁽⁴⁾  Collateralized by the 1901 Market Street building in Philadelphia, Pennsylvania.

⁽⁵⁾  Weighted average is based on contractual balance of outstanding debt and the stated or effectively fixed interest rates in the table as of September 30, 2017.

⁽⁶⁾  On a periodic basis, Piedmont may select from multiple interest rate options, including the prime rate and various-length LIBOR locks. All LIBOR selections are subject to an additional spread over the selected rate based on Piedmont’s current credit rating.

⁽⁷⁾  Facility has a stated variable rate; however, Piedmont has entered into interest rate swap agreements which effectively fix, exclusive of Piedmont's credit rating, the rate shown as the effective rate.

⁽⁸⁾  Piedmont may extend the term for up to one additional year (through two available six month extensions to a final extended maturity date of June 18, 2020) provided Piedmont is not then in default and upon payment of extension fees.

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Variable Interest Entities (Tables)

9 Months Ended

Sep. 30, 2017

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Schedule of Variable Interest Entities

A summary of Piedmont’s interests in, and consolidation treatment of, its VIEs and their related carrying values as of September 30, 2017 and December 31, 2016 is as follows (net carrying amount in millions):

Entity	Piedmont’s % Ownership of Entity		Related Building	Consolidated/ Unconsolidated	Net Carrying Amount as of September 30, 2017		Net Carrying Amount as of December 31, 2016			Primary Beneficiary Considerations
1201 Eye Street N.W. Associates, LLC	98.6%	(1)	1201 Eye Street	Consolidated	$	82.1	$	(6.7	)	In accordance with the partnership’s governing documents, Piedmont currently receives 100% of the cash flow of the entity and has sole discretion in directing the management and leasing activities of the building.
1225 Eye Street N.W. Associates, LLC	98.1%	(1)	1225 Eye Street	Consolidated	$	66.2	$	9.9		In accordance with the partnership’s governing documents, Piedmont currently receives 100% of the cash flow of the entity and has sole discretion in directing the management and leasing activities of the building.
Piedmont 500 W. Monroe Fee, LLC	100%		500 W. Monroe	Consolidated	$	265.2	$	262.4		The Omnibus Agreement with the previous owner includes equity participation rights for the previous owner, if certain financial returns are achieved; however, Piedmont has sole decision making authority and is entitled to 100% of the economic benefits of the property until such returns are met.

⁽¹⁾ During the three months endedSeptember 30, 2017, Piedmont repaid a $140 million mortgage secured by the 1201 and 1225 Eye Street properties located in Washington, D.C., and recapitalized the 1201 and 1225 Eye Street N.W. Associates, LLCs, increasing Piedmont's ownership from 49.5% in each of the LLCs to the amounts stated above.

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Derivative Instruments (Tables)

9 Months Ended

Sep. 30, 2017

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule of Notional Amounts of Outstanding Derivative Positions

A detail of Piedmont’s interest rate derivatives outstanding as of September 30, 2017 is as follows:

Interest Rate Derivatives:	Number of Swap Agreements	Associated Debt Instrument	Total Notional Amount (in millions)		Effective Date	Maturity Date
Interest rate swaps	4	$300 Million Unsecured 2013 Term Loan	$	200	1/30/2014	1/31/2019
Interest rate swaps	2	$300 Million Unsecured 2013 Term Loan	100		8/29/2014	1/31/2019
Interest rate swaps	3	$300 Million Unsecured 2011 Term Loan	300		11/22/2016	1/15/2020
Total			$	600

Schedule of Interest Rate Derivatives

A detail of Piedmont’s interest rate derivatives on a gross and net basis as of September 30, 2017 and December 31, 2016, respectively, is as follows (in thousands):

Interest rate swaps classified as:	September 30, 2017			December 31, 2016
Gross derivative assets	$	34		$	—
Gross derivative liabilities	(3,915		)	(8,169		)
Net derivative asset/(liability)	$	(3,881	)	$	(8,169	)

Schedule of Derivative Instruments, Effect on Other Comprehensive Income (Loss)

The effective portion of Piedmont's interest rate derivatives, including the gain/(loss) on previously settled forward swaps, that was recorded in the accompanying consolidated statements of income for the three and nine months endedSeptember 30, 2017 and 2016, respectively, was as follows (in thousands):

	Three Months Ended				Nine Months Ended
Interest Rate Swaps in Cash Flow Hedging Relationships	September 30, 2017		September 30, 2016		September 30, 2017		September 30, 2016
Amount of gain/(loss) recognized in OCI	$	175	$	2,847	$	307	$	(12,182	)
Amount of previously recorded loss reclassified from accumulated OCI into interest expense	$	653	$	1,045	$	2,936	$	3,291

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Fair Value Measurement of Financial Instruments (Tables)

9 Months Ended

Sep. 30, 2017

Fair Value Disclosures [Abstract]

Fair Value, by Balance Sheet Grouping

The following table sets forth the carrying and estimated fair value for each of Piedmont’s financial instruments, as well as its level within the GAAP fair value hierarchy, as of September 30, 2017 and December 31, 2016, respectively (in thousands):

	September 30, 2017					December 31, 2016
Financial Instrument	Carrying Value		Estimated Fair Value		Level Within Fair Value Hierarchy	Carrying Value		Estimated Fair Value		Level Within Fair Value Hierarchy
Assets:
Cash and cash equivalents(1)	$	36,108	$	36,108	Level 1	$	6,992	$	6,992	Level 1
Tenant receivables, net(1)	$	12,802	$	12,802	Level 1	$	26,494	$	26,494	Level 1
Restricted cash and escrows(1)	$	1,260	$	1,260	Level 1	$	1,212	$	1,212	Level 1
Interest rate swaps	$	34	$	34	Level 2	$	—	$	—	Level 2
Liabilities:
Accounts payable and accrued expenses(1)	$	13,465	$	13,465	Level 1	$	44,733	$	44,733	Level 1
Interest rate swaps	$	3,915	$	3,915	Level 2	$	8,169	$	8,169	Level 2
Debt, net	$	1,703,586	$	1,731,584	Level 2	$	2,020,475	$	2,027,436	Level 2

⁽¹⁾  For the periods presented, the carrying value of these financial instruments approximates estimated fair value due to their short-term maturity.

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Impairment Loss on Real Estate Assets (Tables)

9 Months Ended

Sep. 30, 2017

Real Estate [Abstract]

Details of Impairment of Long-Lived Assets Held and Used by Asset

Piedmont recorded impairment loss on real estate assets for the three and nine months endedSeptember 30, 2017 and 2016, respectively, as follows (in thousands):

	Three Months Ended				Nine Months Ended
	September 30, 2017		September 30, 2016		September 30, 2017		September 30, 2016
150 West Jefferson(1)	$	—	$	—	$	—	$	8,258
9221 Corporate Boulevard (2)	—		—		—		2,692
9200 and 9211 Corporate Boulevard(3)	—		22,951		—		22,951
Total impairment loss on real estate assets(4)	$	—	$	22,951	$	—	$	33,901

⁽¹⁾  Piedmont recognized an impairment loss on real estate assets based upon the difference between the carrying value of the asset and the anticipated contract sales price, less estimated selling costs.

⁽²⁾  Piedmont, using a probability-weighted model heavily weighted towards the short-term sale of the 9221 Corporate Boulevard building in Rockville, Maryland, determined that the carrying value would not be recovered from the undiscounted future operating cash flows expected from the use of the asset and its eventual disposition. As a result, Piedmont recognized a loss on impairment of approximately $2.7 million during the nine months ended September 30, 2016 calculated as the difference between the carrying value of the asset and the anticipated contract sales price, less estimated selling costs.

⁽³⁾  Piedmont elected to sell its remaining two assets and exit the Rockville, Maryland sub-market of Washington, D.C, after selling the 9221 Corporate Boulevard building in July 2016 (mentioned above). Upon management's change in its hold period assumption for the assets from a long-term hold to a near-term sale, Piedmont recognized an impairment loss of approximately $23.0 million. The impairment loss was calculated as the difference between the carrying value of the asset and the anticipated contracted sales price, less estimated selling costs. Piedmont reclassified the properties as held for sale, recognized an impairment loss, entered into a binding contract, and subsequently sold the 9200 and 9211 Corporate Boulevard buildings during the three months ended September 30, 2016.

⁽⁴⁾  The fair value measurements used in the evaluation of the non-financial assets above are considered to be Level 1 valuations within the fair value hierarchy as defined by GAAP, as there are direct observations and transactions involving the assets by unrelated, third-party purchasers.

Details of assets held for sale as of September 30, 2017 and December 31, 2016 are presented below (in thousands):

	September 30, 2017		December 31, 2016
Real estate assets held for sale, net:
Land	$	—	$	52,710
Building and improvements, less accumulated depreciation of $0 and $88,319 as of September 30, 2017 and December 31, 2016, respectively	—		173,218
Construction in progress	—		11
Total real estate assets held for sale, net	$	—	$	225,939
Other assets held for sale, net:
Straight-line rent receivables	$	—	$	2,059
Prepaid expenses and other assets	—		454
Deferred lease costs, less accumulated amortization of $0 and $2,825 as of September 30, 2017 and December 31, 2016, respectively	—		7,302
Total other assets held for sale, net	$	—	$	9,815

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Property Dispositions and Assets Held for Sale (Tables)

9 Months Ended

Sep. 30, 2017

Discontinued Operations and Disposal Groups [Abstract]

Schedule of Disposal Groups, Including Discontinued Operations, Income Statement, Balance Sheet and Additional Disclosures

Details of such properties sold are presented below (in thousands):

Buildings Sold	Location	Date of Sale	Gain/(Loss) on Sale			Net Sales Proceeds
1055 East Colorado Boulevard	Pasadena, California	April 21, 2016	$	29,461		$	60,076
Fairway Center II	Brea, California	April 28, 2016	$	14,405		$	33,062
1901 Main Street	Irvine, California	May 2, 2016	$	29,964		$	63,149
9221 Corporate Boulevard	Rockville, Maryland	July 27, 2016	$	(192	)	$	12,035
150 West Jefferson	Detroit, Michigan	July 29, 2016	$	(680	)	$	77,827
9200 and 9211 Corporate Boulevard	Rockville, Maryland	September 28, 2016	$	(41	)	$	12,518
Sarasota Commerce Center II	Sarasota, Florida	June 16, 2017	$	6,493		$	23,090
Two Independence Square	Washington, D.C.	July 5, 2017	$	109,516		$	352,180

Details of Impairment of Long-Lived Assets Held and Used by Asset

Piedmont recorded impairment loss on real estate assets for the three and nine months endedSeptember 30, 2017 and 2016, respectively, as follows (in thousands):

	Three Months Ended				Nine Months Ended
	September 30, 2017		September 30, 2016		September 30, 2017		September 30, 2016
150 West Jefferson(1)	$	—	$	—	$	—	$	8,258
9221 Corporate Boulevard (2)	—		—		—		2,692
9200 and 9211 Corporate Boulevard(3)	—		22,951		—		22,951
Total impairment loss on real estate assets(4)	$	—	$	22,951	$	—	$	33,901

⁽¹⁾  Piedmont recognized an impairment loss on real estate assets based upon the difference between the carrying value of the asset and the anticipated contract sales price, less estimated selling costs.

⁽²⁾  Piedmont, using a probability-weighted model heavily weighted towards the short-term sale of the 9221 Corporate Boulevard building in Rockville, Maryland, determined that the carrying value would not be recovered from the undiscounted future operating cash flows expected from the use of the asset and its eventual disposition. As a result, Piedmont recognized a loss on impairment of approximately $2.7 million during the nine months ended September 30, 2016 calculated as the difference between the carrying value of the asset and the anticipated contract sales price, less estimated selling costs.

⁽³⁾  Piedmont elected to sell its remaining two assets and exit the Rockville, Maryland sub-market of Washington, D.C, after selling the 9221 Corporate Boulevard building in July 2016 (mentioned above). Upon management's change in its hold period assumption for the assets from a long-term hold to a near-term sale, Piedmont recognized an impairment loss of approximately $23.0 million. The impairment loss was calculated as the difference between the carrying value of the asset and the anticipated contracted sales price, less estimated selling costs. Piedmont reclassified the properties as held for sale, recognized an impairment loss, entered into a binding contract, and subsequently sold the 9200 and 9211 Corporate Boulevard buildings during the three months ended September 30, 2016.

⁽⁴⁾  The fair value measurements used in the evaluation of the non-financial assets above are considered to be Level 1 valuations within the fair value hierarchy as defined by GAAP, as there are direct observations and transactions involving the assets by unrelated, third-party purchasers.

Details of assets held for sale as of September 30, 2017 and December 31, 2016 are presented below (in thousands):

	September 30, 2017		December 31, 2016
Real estate assets held for sale, net:
Land	$	—	$	52,710
Building and improvements, less accumulated depreciation of $0 and $88,319 as of September 30, 2017 and December 31, 2016, respectively	—		173,218
Construction in progress	—		11
Total real estate assets held for sale, net	$	—	$	225,939
Other assets held for sale, net:
Straight-line rent receivables	$	—	$	2,059
Prepaid expenses and other assets	—		454
Deferred lease costs, less accumulated amortization of $0 and $2,825 as of September 30, 2017 and December 31, 2016, respectively	—		7,302
Total other assets held for sale, net	$	—	$	9,815

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Stock Based Compensation (Tables)

9 Months Ended

Sep. 30, 2017

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

Schedule of Nonvested Share Activity

A rollforward of Piedmont's equity based award activity for the nine months endedSeptember 30, 2017 is as follows:

	Shares		Weighted-Average Grant Date Fair Value
Unvested Stock Awards as of December 31, 2016	944,223		$	19.44
Deferred Stock Awards Granted	299,251		$	21.38
Change in Estimated Potential Future Performance Share Awards, net of forfeitures	(7,828	)	$	23.65
Performance Stock Awards Vested	(118,446	)	$	22.00
Deferred Stock Awards Vested	(302,474	)	$	19.35
Deferred Stock Awards Forfeited	(7,200	)	$	19.79
Unvested Stock Awards as of September 30, 2017	807,526		$	21.39

The following table provides additional information regarding stock award activity during the three and nine months endedSeptember 30, 2017 and 2016, respectively (in thousands, except per share amounts):

	Three Months Ended				Nine Months Ended
	September 30, 2017		September 30, 2016		September 30, 2017		September 30, 2016
Weighted-Average Grant Date Fair Value of Deferred Stock Granted During the Period	$	—	$	—	$	21.38	$	19.96
Total Grant Date Fair Value of Deferred Stock Vested During the Period	$	11	$	108	$	5,852	$	4,766
Share-based Liability Awards Paid During the Period(1)	$	—	$	—	$	2,877	$	1,127

⁽¹⁾  Amounts reflect the issuance of performance share awards related to the 2014-16 and 2013-15 Performance Share Plans during the nine months endedSeptember 30, 2017 and 2016, respectively.

Schedule of Outstanding Employee Stock Awards

A detail of Piedmont’s outstanding stock awards as of September 30, 2017 is as follows:

Date of grant	Type of Award	Net Shares Granted (1)	Grant Date Fair Value		Vesting Schedule	Unvested Shares as of September 30, 2017
January 3, 2014	Deferred Stock Award	86,769	$	16.56	Of the shares granted, 20% vested or will vest on January 3, 2015, 2016, 2017, 2018, and 2019, respectively.	35,094
May 1, 2015	Deferred Stock Award	216,837	$	17.59	Of the shares granted, 25% vested on the date of grant, and 25% vested or will vest on May 1, 2016, 2017, and 2018, respectively.	67,114
May 1, 2015	Fiscal Year 2015-2017 Performance Share Program	—	$	18.42	Shares awarded, if any, will vest immediately upon determination of award in 2018.	143,846	(2)
May 24, 2016	Deferred Stock Award	233,011	$	19.91	Of the shares granted, 25% vested on the date of grant, and 25% vested or will vest on May 24, 2017, 2018, and 2019, respectively.	133,092
May 24, 2016	Fiscal Year 2016-2018 Performance Share Program	—	$	23.02	Shares awarded, if any, will vest immediately upon determination of award in 2019.	103,790	(2)
May 18, 2017	Deferred Stock Award-Board of Directors	26,187	$	21.38	Of the shares granted, 100% will vest by May 18, 2018.	26,187
May 18, 2017	Deferred Stock Award	246,740	$	21.38	Of the shares granted, 25% vested on the date of grant, and 25% vested or will vest on May 18, 2018, 2019, and 2020, respectively.	200,899
May 18, 2017	Fiscal Year 2017-2019 Performance Share Program	—	$	30.45	Shares awarded, if any, will vest immediately upon determination of award in 2020.	97,504	(2)
Total						807,526

⁽¹⁾  Amounts reflect the total grant to employees and independent directors, net of shares surrendered upon vesting to satisfy required minimum tax withholding obligations through September 30, 2017.

⁽²⁾  Estimated based on Piedmont's cumulative TSR for the respective performance period through September 30, 2017. Share estimates are subject to change in future periods based upon Piedmont's relative performance compared to its peers' total stockholder return.

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Earnings Per Share (Tables)

9 Months Ended

Sep. 30, 2017

Earnings Per Share [Abstract]

Schedule of Weighted Average Number of Shares

The following table reconciles the denominator for the basic and diluted earnings per share computations shown on the consolidated statements of income for the three and nine months endedSeptember 30, 2017 and 2016, respectively (in thousands):

	Three Months Ended		Nine Months Ended
	September 30, 2017	September 30, 2016	September 30, 2017	September 30, 2016
Weighted-average common shares – basic	145,416	145,231	145,372	145,229
Plus: Incremental weighted-average shares from time-vested deferred and performance stock awards	303	438	308	372
Weighted-average common shares – diluted	145,719	145,669	145,680	145,601
Common stock issued and outstanding as of period end			145,295	145,234

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Guarantor and Non-Guarantor Financial Information (Tables)

9 Months Ended

Sep. 30, 2017

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Condensed Consolidated Balance Sheets

Condensed Consolidated Balance Sheets
As of September 30, 2017
(in thousands)	Issuer		Guarantor			Non-Guarantor Subsidiaries		Eliminations			Consolidated
Assets:
Real estate assets, at cost:
Land	$	43,929	$	—		$	571,005	$	—		$	614,934
Buildings and improvements, less accumulated depreciation	206,700		—			2,516,763		(300		)	2,723,163
Intangible lease assets, less accumulated amortization	317		—			78,383		—			78,700
Construction in progress	797		—			8,160		—			8,957
Total real estate assets	251,743		—			3,174,311		(300		)	3,425,754
Investments in and amounts due from unconsolidated joint ventures	49		—			—		—			49
Cash and cash equivalents	25,884		150			10,074		—			36,108
Tenant and straight-line rent receivables, net	17,556		—			177,855		—			195,411
Advances to affiliates	6,257,405		1,576,739			—		(7,834,144		)	—
Investment in subsidiary	—		3,538,945			177		(3,539,122		)	—
Notes receivable	88,910		—			144,500		(233,410		)	—
Prepaid expenses, restricted cash, escrows, and other assets	4,905		38			25,358		(809		)	29,492
Goodwill	98,918		—			—		—			98,918
Interest rate swaps	34		—			—		—			34
Deferred lease costs, net	13,927		—			260,957		—			274,884
Total assets	$	6,759,331	$	5,115,872		$	3,793,232	$	(11,607,785	)	$	4,060,650
Liabilities:
Debt, net	$	1,511,587	$	—		$	425,409	$	(233,410	)	$	1,703,586
Accounts payable, accrued expenses, and accrued capital expenditures	16,546		652			91,731		(809		)	108,120
Advances from affiliates	790,748		5,226,546			1,915,105		(7,932,399		)	—
Deferred income	3,728		—			26,242		—			29,970
Intangible lease liabilities, net	—		—			41,064		—			41,064
Interest rate swaps	3,915		—			—		—			3,915
Total liabilities	2,326,524		5,227,198			2,499,551		(8,166,618		)	1,886,655
Stockholders’ Equity:
Common stock	—		1,453			—		—			1,453
Additional paid-in capital	3,534,946		3,679,578			1,304		(3,539,122		)	3,676,706
Retained/(cumulative distributions in excess of) earnings	892,461		(3,792,357		)	1,290,513		97,955			(1,511,428		)
Other comprehensive loss	5,400		—			—		—			5,400
Piedmont stockholders’ equity	4,432,807		(111,326		)	1,291,817		(3,441,167		)	2,172,131
Noncontrolling interest	—		—			1,864		—			1,864
Total stockholders’ equity	4,432,807		(111,326		)	1,293,681		(3,441,167		)	2,173,995
Total liabilities and stockholders’ equity	$	6,759,331	$	5,115,872		$	3,793,232	$	(11,607,785	)	$	4,060,650

Condensed Consolidated Balance Sheets
As of December 31, 2016
(in thousands)	Issuer		Guarantor			Non-Guarantor Subsidiaries		Eliminations			Consolidated
Assets:
Real estate assets, at cost:
Land	$	46,133	$	—		$	571,005	$	—		$	617,138
Buildings and improvements, less accumulated depreciation	228,194		—			2,526,212		(300		)	2,754,106
Intangible lease assets, less accumulated amortization	725		—			98,970		—			99,695
Construction in progress	145		—			34,669		—			34,814
Real estate assets held for sale, net	—		—			225,939		—			225,939
Total real estate assets	275,197		—			3,456,795		(300		)	3,731,692
Investments in and amounts due from unconsolidated joint ventures	7,360		—			—		—			7,360
Cash and cash equivalents	3,674		150			3,168		—			6,992
Tenant and straight-line rent receivables, net	20,159		—			170,124		—			190,283
Advances to affiliates	6,464,135		1,315,616			—		(7,779,751		)	—
Investment in subsidiary	—		3,630,564			181		(3,630,745		)	—
Notes receivable	88,910		—			95,790		(184,700		)	—
Prepaid expenses, restricted cash, escrows, and other assets	6,189		—			20,121		(1,897		)	24,413
Goodwill	98,918		—			—		—			98,918
Deferred lease costs, net	16,550		—			282,145		—			298,695
Other assets held for sale, net	—		—			9,815		—			9,815
Total assets	$	6,981,092	$	4,946,330		$	4,038,139	$	(11,597,393	)	$	4,368,168
Liabilities:
Debt, net	$	1,701,933	$	—		$	503,242	$	(184,700	)	$	2,020,475
Accounts payable, accrued expenses, and accrued capital expenditures	17,365		31,230			118,712		(1,897		)	165,410
Advances from affiliates	708,340		5,071,521			2,098,146		(7,878,007		)	—
Deferred income	5,206		—			23,200		—			28,406
Intangible lease liabilities, net	—		—			48,005		—			48,005
Interest rate swaps	8,169		—			—		—			8,169
Total liabilities	2,441,013		5,102,751			2,791,305		(8,064,604		)	2,270,465
Stockholders’ Equity:
Common stock	—		1,452			—		—			1,452
Additional paid-in capital	3,626,564		3,676,000			1,309		(3,630,745		)	3,673,128
Retained/(cumulative distributions in excess of) earnings	911,411		(3,833,873		)	1,243,643		97,956			(1,580,863		)
Other comprehensive income	2,104		—			—		—			2,104
Piedmont stockholders’ equity	4,540,079		(156,421		)	1,244,952		(3,532,789		)	2,095,821
Noncontrolling interest	—		—			1,882		—			1,882
Total stockholders’ equity	4,540,079		(156,421		)	1,246,834		(3,532,789		)	2,097,703
Total liabilities and stockholders’ equity	$	6,981,092	$	4,946,330		$	4,038,139	$	(11,597,393	)	$	4,368,168

Condensed Consolidated Statements of Income

Condensed Consolidated Statements of Income
For the three months ended September 30, 2017
(in thousands)	Issuer			Guarantor			Non-Guarantor Subsidiaries			Eliminations			Consolidated
Revenues:
Rental income	$	10,232		$	—		$	103,544		$	(426	)	$	113,350
Tenant reimbursements	2,376			—			21,562			(142		)	23,796
Property management fee revenue	—			—			4,553			(4,112		)	441
	12,608			—			129,659			(4,680		)	137,587
Expenses:
Property operating costs	5,372			—			53,398			(4,680		)	54,090
Depreciation	3,199			—			26,801			—			30,000
Amortization	740			—			17,383			—			18,123
General and administrative	1,539			77			5,002			—			6,618
	10,850			77			102,584			(4,680		)	108,831
Real estate operating income/(loss)	1,758			(77		)	27,075			—			28,756
Other income (expense):
Interest expense	(13,795		)	—			(6,354		)	3,966			(16,183		)
Other income/(expense)	2,404			—			1,852			(3,966		)	290
Equity in income of unconsolidated joint ventures	3,754			—			—			—			3,754
	(7,637		)	—			(4,502		)	—			(12,139		)
Income/(loss) from continuing operations	(5,879		)	(77		)	22,573			—			16,617
Discontinued operations:
Operating income	—			—			—			—			—
Income from discontinued operations	—			—			—			—			—
Gain/(loss) on sale of real estate assets, net	(4		)	—			109,516			—			109,512
Net income/(loss)	(5,883		)	(77		)	132,089			—			126,129
Plus: Net income applicable to noncontrolling interest	—			—			4			—			4
Net income/(loss) applicable to Piedmont	$	(5,883	)	$	(77	)	$	132,093		$	—		$	126,133

Condensed Consolidated Statements of Income
For the three months ended September 30, 2016
(in thousands)	Issuer			Guarantor			Non-Guarantor Subsidiaries			Eliminations			Consolidated
Revenues:
Rental income	$	12,862		$	—		$	101,423		$	(464	)	$	113,821
Tenant reimbursements	3,430			—			20,970			(237		)	24,163
Property management fee revenue	—			—			3,985			(3,484		)	501
	16,292			—			126,378			(4,185		)	138,485
Expenses:
Property operating costs	7,820			—			51,287			(4,240		)	54,867
Depreciation	3,617			—			27,993			—			31,610
Amortization	863			—			17,777			—			18,640
Impairment loss on real estate assets	—			—			22,951			—			22,951
General and administrative	7,187			83			9,016			(8,857		)	7,429
	19,487			83			129,024			(13,097		)	135,497
Real estate operating income/(loss)	(3,195		)	(83		)	(2,646		)	8,912			2,988
Other income (expense):
Interest expense	(11,799		)	—			(6,949		)	3,252			(15,496		)
Other income/(expense)	2,608			—			(76		)	(3,252		)	(720		)
Net recoveries from casualty events	—			—			34			—			34
Equity in income of unconsolidated joint ventures	129			—			—			—			129
	(9,062		)	—			(6,991		)	—			(16,053		)
Income/(loss) from continuing operations	(12,257		)	(83		)	(9,637		)	8,912			(13,065		)
Discontinued operations:
Operating income	—			—			1			—			1
Income from discontinued operations	—			—			1			—			1
Gain/(loss) on sale of real estate assets, net	134			—			(191		)	—			(57		)
Net income/(loss)	(12,123		)	(83		)	(9,827		)	8,912			(13,121		)
Plus: Net income applicable to noncontrolling interest	—			—			14			—			14
Net income/(loss) applicable to Piedmont	$	(12,123	)	$	(83	)	$	(9,813	)	$	8,912		$	(13,107	)

Condensed Consolidated Statements of Income
For the nine months ended September 30, 2017
(in thousands)	Issuer			Guarantor			Non-Guarantor Subsidiaries			Eliminations			Consolidated
Revenues:
Rental income	$	32,749		$	—		$	329,669		$	(1,370	)	$	361,048
Tenant reimbursements	8,341			—			64,372			(373		)	72,340
Property management fee revenue	—			—			13,753			(12,412		)	1,341
	41,090			—			407,794			(14,155		)	434,729
Expenses:
Property operating costs	17,027			—			162,381			(14,155		)	165,253
Depreciation	9,943			—			80,884			—			90,827
Amortization	2,399			—			55,453			—			57,852
General and administrative	4,798			261			18,191			—			23,250
	34,167			261			316,909			(14,155		)	337,182
Real estate operating income/(loss)	6,923			(261		)	90,885			—			97,547
Other income (expense):
Interest expense	(43,049		)	—			(20,868		)	11,256			(52,661		)
Other income/(expense)	6,873			—			4,611			(11,256		)	228
Equity in income of unconsolidated joint ventures	3,872			—			—			—			3,872
	(32,304		)	—			(16,257		)	—			(48,561		)
Income/(loss) from continuing operations	(25,381		)	(261		)	74,628			—			48,986
Discontinued operations:
Operating income	—			—			—			—			—
Income from discontinued operations	—			—			—			—			—
Gain on sale of real estate assets, net	6,430			—			109,521			—			115,951
Net income/(loss)	(18,951		)	(261		)	184,149			—			164,937
Plus: Net income applicable to noncontrolling interest	—			—			10			—			10
Net income/(loss) applicable to Piedmont	$	(18,951	)	$	(261	)	$	184,159		$	—		$	164,947

Condensed Consolidated Statements of Income
For the nine months ended September 30, 2016
(in thousands)	Issuer			Guarantor			Non-Guarantor Subsidiaries			Eliminations			Consolidated
Revenues:
Rental income	$	42,990		$	—		$	299,319		$	(1,983	)	$	340,326
Tenant reimbursements	10,455			—			59,950			(405		)	70,000
Property management fee revenue	—			—			12,480			(11,002		)	1,478
	53,445			—			371,749			(13,390		)	411,804
Expenses:
Property operating costs	24,583			—			150,369			(13,514		)	161,438
Depreciation	12,993			—			81,955			—			94,948
Amortization	2,854			—			50,994			—			53,848
Impairment loss of real estate assets	8,259			—			25,642			—			33,901
General and administrative	22,802			251			28,881			(28,416		)	23,518
	71,491			251			337,841			(41,930		)	367,653
Real estate operating income/(loss)	(18,046		)	(251		)	33,908			28,540			44,151
Other income (expense):
Interest expense	(36,159		)	—			(20,354		)	8,219			(48,294		)
Other income/(expense)	7,008			282			462			(8,219		)	(467		)
Net recoveries from casualty events	—			—			34			—			34
Equity in income of unconsolidated joint ventures	354			—			—			—			354
	(28,797		)	282			(19,858		)	—			(48,373		)
Net income/(loss)	(46,843		)	31			14,050			28,540			(4,222		)
Discontinued operations:
Operating income	—			—			—			—			—
Income from discontinued operations	—			—			—			—			—
Gain on sale of real estate assets, net	30,096			—			43,662			—			73,758
Net income/(loss)	(16,747		)	31			57,712			28,540			69,536
Plus: Net income applicable to noncontrolling interest	—			—			7			—			7
Net income/(loss) applicable to Piedmont	$	(16,747	)	$	31		$	57,719		$	28,540		$	69,543

Condensed Consolidated Statements of Cash Flows

Condensed Consolidated Statements of Cash Flows
For the nine months ended September 30, 2017
(in thousands)	Issuer			Guarantor			Non-Guarantor Subsidiaries			Eliminations			Consolidated
Net Cash Provided by/(Used in) Operating Activities	$	(15,467	)	$	4,335		$	187,464		$	—		$	176,332
Cash Flows from Investing Activities:
Investment in real estate assets and real estate related intangibles, net of accruals	(793		)	—			(64,614		)	—			(65,407		)
Intercompany note receivable	—			—			(48,710		)	48,710			—
Net sales proceeds from wholly-owned properties	23,028			—			352,171			—			375,199
Net sales proceeds received from unconsolidated joint ventures	12,334			—			—			—			12,334
Investments in unconsolidated joint ventures	(1,162		)	—			—			—			(1,162		)
Deferred lease costs paid	(858		)	—			(18,561		)	—			(19,419		)
Net cash provided by investing activities	32,549			—			220,286			48,710			301,545
Cash Flows from Financing Activities:
Debt issuance costs paid	(102		)	—			1			—			(101		)
Proceeds from debt	147,000			—			—			—			147,000
Repayments of debt	(325,000		)	—			(141,046		)	—			(466,046		)
Intercompany note payable	(14,289		)	—			62,999			(48,710		)	—
Costs of issuance of common stock	—			(97		)	—			—			(97		)
Value of shares withheld to pay tax obligations related to employee stock compensation	—			(3,385		)	—			—			(3,385		)
Repurchases of common stock as part of announced plan	—			(3,895		)	—			—			(3,895		)
(Distributions to)/repayments from affiliates	197,519			125,271			(322,790		)	—			—
Dividends paid and discount on dividend reinvestments	—			(122,229		)	(8		)	—			(122,237		)
Net cash used in financing activities	5,128			(4,335		)	(400,844		)	(48,710		)	(448,761		)
Net increase in cash and cash equivalents	22,210			—			6,906			—			29,116
Cash and cash equivalents, beginning of period	3,674			150			3,168			—			6,992
Cash and cash equivalents, end of period	$	25,884		$	150		$	10,074		$	—		$	36,108

Condensed Consolidated Statements of Cash Flows
For the nine months ended September 30, 2016
(in thousands)	Issuer			Guarantor			Non-Guarantor Subsidiaries			Eliminations			Consolidated
Net Cash Provided by/(Used in) Operating Activities	$	(18,977	)	$	4,121		$	158,352		$	28,540		$	172,036
Cash Flows from Investing Activities:
Investment in real estate assets, consolidated joint venture, and real estate related intangibles, net of accruals	(24,255		)	—			(296,884		)	—			(321,139		)
Intercompany note receivable	440			—			(71,900		)	71,460			—
Net sales proceeds from wholly-owned properties	187,192			—			117,710			—			304,902
Deferred lease costs paid	(2,021		)	—			(13,324		)	—			(15,345		)
Net cash provided by/(used in) investing activities	161,356			—			(264,398		)	71,460			(31,582		)
Cash Flows from Financing Activities:
Debt issuance costs paid	(212		)	—			—			—			(212		)
Proceeds from debt	552,000			—			—			—			552,000
Repayments of debt	(421,000		)	—			(168,532		)	—			(589,532		)
Intercompany note payable	(9,600		)	—			81,060			(71,460		)	—
Costs of issuance of common stock	—			(239		)	—			—			(239		)
Value of shares withheld to pay tax obligations related to employee stock compensation	—			(2,328		)	—			—			(2,328		)
Repurchases of common stock as part of announced plan	—			(7,943		)	—			—			(7,943		)
(Distributions to)/repayments from affiliates	(262,150		)	97,990			192,700			(28,540		)	—
Dividends paid and discount on dividend reinvestments	—			(91,601		)	(8		)	—			(91,609		)
Net cash provided by/(used in) financing activities	(140,962		)	(4,121		)	105,220			(100,000		)	(139,863		)
Net increase/(decrease) in cash and cash equivalents	1,417			—			(826		)	—			591
Cash and cash equivalents, beginning of period	2,174			150			3,117			—			5,441
Cash and cash equivalents, end of period	$	3,591		$	150		$	2,291		$	—		$	6,032

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Organization (Details) ft² in Millions	9 Months Ended
	Sep. 30, 2017 ft² segment property subsidiary market
Real Estate Properties [Line Items]
Number of wholly-owned subsidiaries | subsidiary	2
Percentage ownership by sole general partner	99.90%
Percentage ownership by sole limited partner	0.10%
Percentage of annualized lease revenue	88.00%
Number of operating segments | segment	1
U.S.
Real Estate Properties [Line Items]
Number of major U.S. office markets | market	8
In Service Office Properties
Real Estate Properties [Line Items]
Number of real estate properties | property	66
Square footage of real estate property | ft²	19
Percentage leased	89.20%

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Summary of Significant Accounting Policies (Details)	9 Months Ended
	Sep. 30, 2017
Total Revenues Derived from Long Term Leases to Tenants or Reimbursement of Property Tax and Insurance Expenses | Sales Revenue, Net
Concentration Risk [Line Items]
Percentage of total revenues	90.00%

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Debt (Details)		9 Months Ended
	Aug. 01, 2017 USD ($)	Sep. 30, 2017 USD ($) period	Jul. 05, 2017 USD ($)	Dec. 31, 2016 USD ($)
Debt Instrument [Line Items]
Weighted average rate		3.47%
Amount Outstanding		$ 1,703,586,000		$ 2,020,475,000
Secured Debt
Debt Instrument [Line Items]
Weighted average rate		3.82%
Amount Outstanding		$ 191,923,000		332,744,000
Net premium, discounts, and unamortized debt issuance costs		1,020,000		1,161,000
Secured Debt | $140 Million WDC Fixed-Rate Loans
Debt Instrument [Line Items]
Face amount of debt instrument		$ 140,000,000
Stated Rate		5.76%
Effective interest rate		5.76%
Amount Outstanding		$ 0		140,000,000
Amount fully repaid	$ 140,000,000
Secured Debt | $35 Million Fixed-Rate Loan
Debt Instrument [Line Items]
Face amount of debt instrument		$ 35,000,000
Stated Rate		5.55%
Effective interest rate		3.75%
Amount Outstanding		$ 30,903,000		31,583,000
Secured Debt | $160 Million Fixed Rate Loan
Debt Instrument [Line Items]
Face amount of debt instrument		$ 160,000,000
Stated Rate		3.48%
Effective interest rate		3.58%
Amount Outstanding		$ 160,000,000		160,000,000
Unsecured Debt
Debt Instrument [Line Items]
Weighted average rate		3.43%
Amount Outstanding		$ 1,511,663,000		1,687,731,000
Net premium, discounts, and unamortized debt issuance costs		(8,337,000)		(10,269,000)
Unsecured Debt | $170 Million Unsecured 2015 Term Loan
Debt Instrument [Line Items]
Face amount of debt instrument		$ 170,000,000
Effective interest rate		2.37%
Amount Outstanding		$ 170,000,000		170,000,000
Unsecured Debt | $170 Million Unsecured 2015 Term Loan | London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Basis spread on variable rate		1.125%
Unsecured Debt | $300 Million Unsecured 2013 Term Loan
Debt Instrument [Line Items]
Face amount of debt instrument		$ 300,000,000
Amount Outstanding		$ 300,000,000		300,000,000
Unsecured Debt | $300 Million Unsecured 2013 Term Loan | Interest rate swaps
Debt Instrument [Line Items]
Effective interest rate		2.78%
Unsecured Debt | $300 Million Unsecured 2013 Term Loan | London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Basis spread on variable rate		1.20%
Unsecured Debt | $500 Million Unsecured 2015 Line of Credit | Line of Credit
Debt Instrument [Line Items]
Face amount of debt instrument		$ 500,000,000
Effective interest rate		0.00%
Amount Outstanding		$ 0		178,000,000
Maximum extension period		1 year
Number of extension periods | period		2
Extension period		6 months
Amount of line of credit			$ 500,000,000
Unsecured Debt | $500 Million Unsecured 2015 Line of Credit | Line of Credit | London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Basis spread on variable rate		1.00%
Unsecured Debt | $300 Million Unsecured 2011 Term Loan
Debt Instrument [Line Items]
Face amount of debt instrument		$ 300,000,000
Amount Outstanding		$ 300,000,000		300,000,000
Unsecured Debt | $300 Million Unsecured 2011 Term Loan | Interest rate swaps
Debt Instrument [Line Items]
Effective interest rate		3.35%
Unsecured Debt | $300 Million Unsecured 2011 Term Loan | London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Basis spread on variable rate		1.15%
Unsecured Debt | $350 Million Senior Notes
Debt Instrument [Line Items]
Face amount of debt instrument		$ 350,000,000
Stated Rate		3.40%
Effective interest rate		3.43%
Amount Outstanding		$ 350,000,000		350,000,000
Unsecured Debt | $400 Million Senior Notes
Debt Instrument [Line Items]
Face amount of debt instrument		$ 400,000,000
Stated Rate		4.45%
Effective interest rate		4.10%
Amount Outstanding		$ 400,000,000		$ 400,000,000

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Debt (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Debt Disclosure [Abstract]
Interest payments on debt facilities	$ 18,000	$ 18,500	$ 54,000	$ 53,200
Capitalized interest	$ 37	$ 1,500	$ 200	$ 3,400

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Variable Interest Entities (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Jun. 30, 2017	Sep. 30, 2017	Dec. 31, 2016
Eye Street 1201 N.W. Associates LLC
Variable Interest Entity [Line Items]
Piedmont’s % Ownership of Entity			98.60%
Net Carrying Amount	$ 82.1		$ 82.1	$ (6.7)
Primary Beneficiary Considerations, percentage of cash flow and economic benefits	100.00%		100.00%
Eye Street 1225 N.W. Associates LLC
Variable Interest Entity [Line Items]
Piedmont’s % Ownership of Entity			98.10%
Net Carrying Amount	$ 66.2		$ 66.2	9.9
Primary Beneficiary Considerations, percentage of cash flow and economic benefits	100.00%		100.00%
Piedmont 500 W. Monroe Fee LLC
Variable Interest Entity [Line Items]
Piedmont’s % Ownership of Entity			100.00%
Net Carrying Amount	$ 265.2		$ 265.2	$ 262.4
Primary Beneficiary Considerations, percentage of cash flow and economic benefits	100.00%		100.00%
Eye Street 1201 NW Associates LLC and Eye Street 1225, NW Associates LLC [Member]
Variable Interest Entity [Line Items]
Piedmont’s % Ownership of Entity		49.50%
Repayment of secured mortgage	$ 140.0

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Derivative Instruments (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2017 USD ($) contract	Sep. 30, 2016 USD ($)	Sep. 30, 2017 USD ($) contract	Sep. 30, 2016 USD ($)	Dec. 31, 2016 USD ($)
Derivative [Line Items]
Maximum period of extension term			27 months
Interest Rate Cash Flow Hedge Derivative at Fair Value, Net [Abstract]
Gross derivative assets	$ (34,000)		$ (34,000)		$ 0
Gross derivative liabilities	(3,915,000)		(3,915,000)		(8,169,000)
Net derivative asset/(liability)	(3,881,000)		(3,881,000)		$ (8,169,000)
Loss to be reclassified from accumulated other comprehensive loss to interest expense over next twelve months	1,200,000		1,200,000
Loss related to hedge ineffectiveness and terminations of cash flow hedges	0	$ 0	0	$ 0
Interest rate swaps
Derivative [Line Items]
Total notional value	600,000,000		600,000,000
Interest rate swaps | Interest Expense
Interest Rate Cash Flow Hedge Derivative at Fair Value, Net [Abstract]
Amount of gain/(loss) recognized in OCI	175,000	2,847,000	307,000	(12,182,000)
Amount of previously recorded loss reclassified from accumulated OCI into interest expense	653,000	$ 1,045,000	2,936,000	$ 3,291,000
Credit Risk Contract
Interest Rate Cash Flow Hedge Derivative at Fair Value, Net [Abstract]
Assets needed for immediate settlement, aggregate fair value	4,000,000		4,000,000
Unsecured Debt | $300 Million Unsecured 2013 Term Loan
Derivative [Line Items]
Face amount of debt instrument	$ 300,000,000		$ 300,000,000
Unsecured Debt | $300 Million Unsecured 2013 Term Loan | Interest Rate Swap 1 through 4
Derivative [Line Items]
Number of Swap Agreements | contract	4		4
Total notional value	$ 200,000,000		$ 200,000,000
Unsecured Debt | $300 Million Unsecured 2013 Term Loan | Interest Rate Swap 5 through 6
Derivative [Line Items]
Number of Swap Agreements | contract	2		2
Total notional value	$ 100,000,000		$ 100,000,000
Unsecured Debt | $300 Million Unsecured 2011 Term Loan
Derivative [Line Items]
Face amount of debt instrument	$ 300,000,000		$ 300,000,000
Unsecured Debt | $300 Million Unsecured 2011 Term Loan | Interest Rate Swap 7 through 9
Derivative [Line Items]
Number of Swap Agreements | contract	3		3
Total notional value	$ 300,000,000		$ 300,000,000

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Fair Value Measurement of Financial Instruments (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Interest rate swaps	$ 34	$ 0
Interest rate swaps	3,915	8,169
Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	36,108	6,992
Restricted cash and escrows	1,260	1,212
Accounts payable and accrued expenses	13,465	44,733
Debt, net	1,703,586	2,020,475
Interest rate swaps | Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Interest rate swaps	34	0
Interest rate swaps	3,915	8,169
Tenant receivables, net | Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Tenant receivables, net	12,802	26,494
Level 1 | Estimated Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	36,108	6,992
Restricted cash and escrows	1,260	1,212
Accounts payable and accrued expenses	13,465	44,733
Level 1 | Tenant receivables, net | Estimated Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Tenant receivables, net	12,802	26,494
Level 2 | Estimated Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt, net	1,731,584	2,027,436
Level 2 | Interest rate swaps | Estimated Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Interest rate swaps	34	0
Interest rate swaps	$ 3,915	$ 8,169

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Impairment Loss on Real Estate Assets (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017 USD ($)	Sep. 30, 2016 USD ($)	Sep. 30, 2017 USD ($)	Sep. 30, 2016 USD ($)	Jul. 31, 2016 property
Impaired Long-Lived Assets Held and Used [Line Items]
Impairment loss on real estate assets	$ 0	$ 22,951	$ 0	$ 33,901
Disposal Group, Held-for-sale, Not Discontinued Operations | 150 West Jefferson
Impaired Long-Lived Assets Held and Used [Line Items]
Impairment loss on real estate assets	0	0	0	8,258
Disposal Group, Held-for-sale, Not Discontinued Operations | 9200 and 9211 Corporate Boulevard
Impaired Long-Lived Assets Held and Used [Line Items]
Impairment loss on real estate assets	0	22,951	0	22,951
Number of real estate properties sold | property					2
Disposal Group, Disposed of by Sale, Not Discontinued Operations | 9221 Corporate Boulevard
Impaired Long-Lived Assets Held and Used [Line Items]
Impairment loss on real estate assets	$ 0	$ 0	$ 0	2,692
Impairment loss				2,700
Disposal Group, Disposed of by Sale, Not Discontinued Operations | 9200 and 9211 Corporate Boulevard
Impaired Long-Lived Assets Held and Used [Line Items]
Impairment loss				$ 23,000

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Commitments and Contingencies (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2017 USD ($) category	Sep. 30, 2016 USD ($)	Sep. 30, 2017 USD ($) category	Sep. 30, 2016 USD ($)
Loss Contingencies [Line Items]
Number of tenant and building improvement categories | category	2		2
Collectibility of Tenant Reimbursements
Loss Contingencies [Line Items]
Reductions in reimbursement revenues	$ 0	$ 0	$ 300,000	$ 0
Non-Incremental Capital Expenditures
Loss Contingencies [Line Items]
Period for commitments for funding non-incremental capital expenditures			5 years
Potential obligations for tenant improvements	32,100,000		$ 32,100,000
Non-Incremental Capital Expenditures | Maximum
Loss Contingencies [Line Items]
Period for commitments for funding non-incremental capital expenditures			3 years
Incremental Capital Expenditures
Loss Contingencies [Line Items]
Potential obligations for tenant improvements	$ 15,200,000		$ 15,200,000

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Property Dispositions and Assets Held for Sale (Property Dispositions) (Details) - Disposal Group, Disposed of by Sale, Not Discontinued Operations - USD ($) $ in Thousands	Jul. 05, 2017	Jun. 16, 2017	Sep. 28, 2016	Jul. 29, 2016	Jul. 27, 2016	May 02, 2016	Apr. 28, 2016	Apr. 21, 2016
1055 East Colorado Boulevard
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain/(Loss) on Sale								$ 29,461
Net Sales Proceeds								$ 60,076
Fairway Center II
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain/(Loss) on Sale							$ 14,405
Net Sales Proceeds							$ 33,062
1901 Main Street
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain/(Loss) on Sale						$ 29,964
Net Sales Proceeds						$ 63,149
9221 Corporate Boulevard
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain/(Loss) on Sale					$ (192)
Net Sales Proceeds					$ 12,035
150 West Jefferson
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain/(Loss) on Sale				$ (680)
Net Sales Proceeds				$ 77,827
9200 and 9211 Corporate Boulevard
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain/(Loss) on Sale			$ (41)
Net Sales Proceeds			$ 12,518
Sarasota Commerce Center II
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain/(Loss) on Sale		$ 6,493
Net Sales Proceeds		$ 23,090
Two Independence Square
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain/(Loss) on Sale	$ 109,516
Net Sales Proceeds	$ 352,180

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Property Dispositions and Assets Held for Sale (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2017	Sep. 30, 2016
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net sales proceeds from equity method investment		$ 12,334	$ 0
8560 Upland Drive building | Disposal Group, Disposed of by Sale, Not Discontinued Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Percent of interest sold	72.00%	72.00%
Amount of investment sold	$ 12,700
Net sales proceeds from equity method investment	12,300
Gain on sale of equity method investment	$ 3,700

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Property Dispositions and Assets Held for Sale (Assets Held-for-Sale) (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Total other assets held for sale, net	$ 0	$ 9,815
Disposal Group, Held-for-sale, Not Discontinued Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Total real estate assets held for sale, net	0	225,939
Straight-line rent receivables	0	2,059
Prepaid expenses and other assets	0	454
Deferred lease costs, less accumulated amortization of $0 and $2,825 as of September 30, 2017 and December 31, 2016, respectively	0	7,302
Accumulated amortization on deferred lease costs	0	2,825
Total other assets held for sale, net	0	9,815
Disposal Group, Held-for-sale, Not Discontinued Operations | Land
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Real estate assets held for sale, net:	0	52,710
Disposal Group, Held-for-sale, Not Discontinued Operations | Building and building improvements
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Real estate assets held for sale, net:	0	173,218
Accumulated depreciation (building improvements)	0	88,319
Disposal Group, Held-for-sale, Not Discontinued Operations | Construction in progress
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Real estate assets held for sale, net:	$ 0	$ 11

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Stock Based Compensation (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense related to stock awards	$ 1.3	$ 2.0	$ 7.0	$ 7.7
Amortization of unvested shares			$ 5.2	$ 6.2
Total shares issued to employees, directors, and officers (in shares)			254,873
Unrecognized compensation cost related to nonvested	$ 5.1		$ 5.1
Weighted Average
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost related to nonvested, weighted-average vesting period			1 year
Stock Awards | Board of Directors
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period			1 year

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Stock Based Compensation (Rollforward of Stock Awards) (Details) - $ / shares	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Stock Awards
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward]
Unvested Stock Awards, Beginning of period (in shares)			944,223
Unvested Stock Awards, End of period (in shares)	807,526		807,526
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]
Unvested Stock Awards, Weighted-Average Grant Date Fair Value, Beginning of period (in dollars per share)			$ 19.44
Unvested Stock Awards, Weighted-Average Grant Date Fair Value, End of period (in dollars per share)	$ 21.39		$ 21.39
Deferred Stock Awards
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward]
Deferred Stock Awards Granted (in shares)			299,251
Performance Stock Awards and Deferred Stock Awards Vested (in shares)			(302,474)
Deferred Stock Awards Forfeited (in shares)			(7,200)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]
Deferred Stock Awards Granted, Weighted-Average Grant Date Fair Value (in dollars per share)	$ 0.00	$ 0.00	$ 21.38	$ 19.96
Performance Stock Awards and Deferred Stock Awards Vested, Weighted-Average Grant Date Fair Value (in dollars per share)			19.35
Deferred Stock Awards Forfeited, Weighted-Average Grant Date Fair Value (in dollars per share)			$ 19.79
Performance Share Awards
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward]
Change in Estimated Potential Future Performance Share Awards, net of forfeitures (in shares)			(7,828)
Performance Stock Awards and Deferred Stock Awards Vested (in shares)			(118,446)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]
Change in Estimated Potential Future Performance Share Awards, net of forfeitures, Weighted-Average Grant Date Fair Value (in dollars per share)			$ 23.65
Performance Stock Awards and Deferred Stock Awards Vested, Weighted-Average Grant Date Fair Value (in dollars per share)			$ 22.00

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Stock Based Compensation (Additional Information Regarding Stock Award Activity) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Deferred Stock Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted-Average Grant Date Fair Value of Deferred Stock Granted During the Period (in dollars per share)	$ 0.00	$ 0.00	$ 21.38	$ 19.96
Total Grant Date Fair Value of Deferred Stock Vested During the Period	$ 11	$ 108	$ 5,852	$ 4,766
Performance Share Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Liability Awards Paid During the Period	$ 0	$ 0	$ 2,877	$ 1,127

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Stock Based Compensation (Outstanding Employee Stock Awards) (Details) - $ / shares	May 18, 2017	May 24, 2016	May 01, 2015	Jan. 03, 2014	Sep. 30, 2017	Dec. 31, 2016
Stock Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grant Date Fair Value (in dollars per share)					$ 21.39	$ 19.44
Unvested Shares (in shares)					807,526	944,223
Deferred Stock Awards | Deferred Stock Award, Granted January 3, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Net Shares Granted (in shares)				86,769
Grant Date Fair Value (in dollars per share)				$ 16.56
Unvested Shares (in shares)					35,094
Deferred Stock Awards | Deferred Stock Award, Granted January 3, 2014 | Share-based Compensation Award, Tranche One
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage				20.00%
Deferred Stock Awards | Deferred Stock Award, Granted January 3, 2014 | Share-based Compensation Award, Tranche Two
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage				20.00%
Deferred Stock Awards | Deferred Stock Award, Granted January 3, 2014 | Share-based Compensation Award, Tranche Three
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage				20.00%
Deferred Stock Awards | Deferred Stock Award, Granted January 3, 2014 | Share-based Compensation Award, Tranche Four
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage				20.00%
Deferred Stock Awards | Deferred Stock Award, Granted January 3, 2014 | Share-based Compensation Award, Tranche Five
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage				20.00%
Deferred Stock Awards | Deferred Stock Award, Granted May 1, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Net Shares Granted (in shares)			216,837
Grant Date Fair Value (in dollars per share)			$ 17.59
Unvested Shares (in shares)					67,114
Deferred Stock Awards | Deferred Stock Award, Granted May 1, 2015 | Share-based Compensation Award, Tranche One
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage			25.00%
Deferred Stock Awards | Deferred Stock Award, Granted May 1, 2015 | Share-based Compensation Award, Tranche Two
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage			25.00%
Deferred Stock Awards | Deferred Stock Award, Granted May 1, 2015 | Share-based Compensation Award, Tranche Three
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage			25.00%
Deferred Stock Awards | Deferred Stock Award, Granted May 1, 2015 | Share-based Compensation Award, Tranche Four
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage			25.00%
Deferred Stock Awards | Deferred Stock Award, Granted May 24, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Net Shares Granted (in shares)		233,011
Grant Date Fair Value (in dollars per share)		$ 19.91
Unvested Shares (in shares)					133,092
Deferred Stock Awards | Deferred Stock Award, Granted May 24, 2016 | Share-based Compensation Award, Tranche One
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage		25.00%
Deferred Stock Awards | Deferred Stock Award, Granted May 24, 2016 | Share-based Compensation Award, Tranche Two
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage		25.00%
Deferred Stock Awards | Deferred Stock Award, Granted May 24, 2016 | Share-based Compensation Award, Tranche Three
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage		25.00%
Deferred Stock Awards | Deferred Stock Award, Granted May 24, 2016 | Share-based Compensation Award, Tranche Four
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage		25.00%
Deferred Stock Awards | Deferred Stock Award, Granted May 18, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Net Shares Granted (in shares)	246,740
Grant Date Fair Value (in dollars per share)	$ 21.38
Unvested Shares (in shares)					200,899
Deferred Stock Awards | Deferred Stock Award, Granted May 18, 2017 | Board of Directors
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Net Shares Granted (in shares)	26,187
Grant Date Fair Value (in dollars per share)	$ 21.38
Unvested Shares (in shares)					26,187
Deferred Stock Awards | Deferred Stock Award, Granted May 18, 2017 | Share-based Compensation Award, Tranche One
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage	25.00%
Deferred Stock Awards | Deferred Stock Award, Granted May 18, 2017 | Share-based Compensation Award, Tranche One | Board of Directors
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage	100.00%
Deferred Stock Awards | Deferred Stock Award, Granted May 18, 2017 | Share-based Compensation Award, Tranche Two
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage	25.00%
Deferred Stock Awards | Deferred Stock Award, Granted May 18, 2017 | Share-based Compensation Award, Tranche Three
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage	25.00%
Deferred Stock Awards | Deferred Stock Award, Granted May 18, 2017 | Share-based Compensation Award, Tranche Four
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage	25.00%
Performance Share Awards | Performance Share Program Award, Granted May 1, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Net Shares Granted (in shares)			0
Grant Date Fair Value (in dollars per share)			$ 18.42
Unvested Shares (in shares)					143,846
Performance Share Awards | Performance Share Program Award, Granted May 24, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Net Shares Granted (in shares)		0
Grant Date Fair Value (in dollars per share)		$ 23.02
Unvested Shares (in shares)					103,790
Performance Share Awards | Performance Share Program Award, Granted May 18, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Net Shares Granted (in shares)	0
Grant Date Fair Value (in dollars per share)	$ 30.45
Unvested Shares (in shares)					97,504

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Earnings Per Share (Details) - shares	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Earnings Per Share [Abstract]
Weighted-average common shares outstanding – basic (in shares)	145,415,678	145,231,160	145,372,182	145,228,755
Plus: Incremental weighted-average shares from time-vested deferred and performance stock awards (in shares)	303,000	438,000	308,000	372,000
Weighted-average common shares outstanding – diluted (in shares)	145,719,431	145,669,237	145,679,582	145,601,026
Common stock, shares issued (in shares)	145,294,845	145,234,000	145,294,845	145,234,000	145,235,313
Common stock, shares outstanding (in shares)	145,294,845	145,234,000	145,294,845	145,234,000	145,235,313

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Guarantor and Non-Guarantor Financial Information (Condensed Consolidated Balance Sheets) (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016	Sep. 30, 2016	Dec. 31, 2015
Assets:
Land	$ 614,934	$ 617,138
Buildings and improvements, less accumulated depreciation	2,723,163	2,754,106
Intangible lease assets, less accumulated amortization	78,700	99,695
Construction in progress	8,957	34,814
Real estate assets held for sale, net	0	225,939
Total real estate assets	3,425,754	3,731,692
Investments in and amounts due from unconsolidated joint ventures	49	7,360
Cash and cash equivalents	36,108	6,992	$ 6,032	$ 5,441
Tenant and straight-line rent receivables, net	195,411	190,283
Advances to affiliates	0	0
Investment in subsidiary	0	0
Note receivable	0	0
Prepaid expenses, restricted cash, escrows, and other assets	29,492	24,413
Goodwill	98,918	98,918
Interest rate swaps	34	0
Deferred lease costs, net	274,884	298,695
Other assets held for sale, net	0	9,815
Total assets	4,060,650	4,368,168
Liabilities:
Debt, net	1,703,586	2,020,475
Accounts payable, accrued expenses, and accrued capital expenditures	108,120	165,410
Advances from affiliates	0	0
Deferred income	29,970	28,406
Intangible lease liabilities, net	41,064	48,005
Interest rate swaps	3,915	8,169
Total liabilities	1,886,655	2,270,465
Stockholders’ Equity:
Common stock	1,453	1,452
Additional paid-in capital	3,676,706	3,673,128
Cumulative distributions in excess of earnings	(1,511,428)	(1,580,863)
Other comprehensive loss income	5,400	2,104
Piedmont stockholders’ equity	2,172,131	2,095,821
Noncontrolling interest	1,864	1,882
Total stockholders’ equity	2,173,995	2,097,703		2,123,420
Total liabilities and stockholders’ equity	4,060,650	4,368,168
Eliminations
Assets:
Land	0	0
Buildings and improvements, less accumulated depreciation	(300)	(300)
Intangible lease assets, less accumulated amortization	0	0
Construction in progress	0	0
Real estate assets held for sale, net		0
Total real estate assets	(300)	(300)
Investments in and amounts due from unconsolidated joint ventures	0	0
Cash and cash equivalents	0	0	0	0
Tenant and straight-line rent receivables, net	0	0
Advances to affiliates	(7,834,144)	(7,779,751)
Investment in subsidiary	(3,539,122)	(3,630,745)
Note receivable	(233,410)	(184,700)
Prepaid expenses, restricted cash, escrows, and other assets	(809)	(1,897)
Goodwill	0	0
Interest rate swaps	0
Deferred lease costs, net	0	0
Other assets held for sale, net		0
Total assets	(11,607,785)	(11,597,393)
Liabilities:
Debt, net	(233,410)	(184,700)
Accounts payable, accrued expenses, and accrued capital expenditures	(809)	(1,897)
Advances from affiliates	(7,932,399)	(7,878,007)
Deferred income	0	0
Intangible lease liabilities, net	0	0
Interest rate swaps	0	0
Total liabilities	(8,166,618)	(8,064,604)
Stockholders’ Equity:
Common stock	0	0
Additional paid-in capital	(3,539,122)	(3,630,745)
Cumulative distributions in excess of earnings	97,955	97,956
Other comprehensive loss income	0	0
Piedmont stockholders’ equity	(3,441,167)	(3,532,789)
Noncontrolling interest	0	0
Total stockholders’ equity	(3,441,167)	(3,532,789)
Total liabilities and stockholders’ equity	(11,607,785)	(11,597,393)
Issuer
Assets:
Land	43,929	46,133
Buildings and improvements, less accumulated depreciation	206,700	228,194
Intangible lease assets, less accumulated amortization	317	725
Construction in progress	797	145
Real estate assets held for sale, net		0
Total real estate assets	251,743	275,197
Investments in and amounts due from unconsolidated joint ventures	49	7,360
Cash and cash equivalents	25,884	3,674	3,591	2,174
Tenant and straight-line rent receivables, net	17,556	20,159
Advances to affiliates	6,257,405	6,464,135
Investment in subsidiary	0	0
Note receivable	88,910	88,910
Prepaid expenses, restricted cash, escrows, and other assets	4,905	6,189
Goodwill	98,918	98,918
Interest rate swaps	34
Deferred lease costs, net	13,927	16,550
Other assets held for sale, net		0
Total assets	6,759,331	6,981,092
Liabilities:
Debt, net	1,511,587	1,701,933
Accounts payable, accrued expenses, and accrued capital expenditures	16,546	17,365
Advances from affiliates	790,748	708,340
Deferred income	3,728	5,206
Intangible lease liabilities, net	0	0
Interest rate swaps	3,915	8,169
Total liabilities	2,326,524	2,441,013
Stockholders’ Equity:
Common stock	0	0
Additional paid-in capital	3,534,946	3,626,564
Cumulative distributions in excess of earnings	892,461	911,411
Other comprehensive loss income	5,400	2,104
Piedmont stockholders’ equity	4,432,807	4,540,079
Noncontrolling interest	0	0
Total stockholders’ equity	4,432,807	4,540,079
Total liabilities and stockholders’ equity	6,759,331	6,981,092
Guarantor
Assets:
Land	0	0
Buildings and improvements, less accumulated depreciation	0	0
Intangible lease assets, less accumulated amortization	0	0
Construction in progress	0	0
Real estate assets held for sale, net		0
Total real estate assets	0	0
Investments in and amounts due from unconsolidated joint ventures	0	0
Cash and cash equivalents	150	150	150	150
Tenant and straight-line rent receivables, net	0	0
Advances to affiliates	1,576,739	1,315,616
Investment in subsidiary	3,538,945	3,630,564
Note receivable	0	0
Prepaid expenses, restricted cash, escrows, and other assets	38	0
Goodwill	0	0
Interest rate swaps	0
Deferred lease costs, net	0	0
Other assets held for sale, net		0
Total assets	5,115,872	4,946,330
Liabilities:
Debt, net	0	0
Accounts payable, accrued expenses, and accrued capital expenditures	652	31,230
Advances from affiliates	5,226,546	5,071,521
Deferred income	0	0
Intangible lease liabilities, net	0	0
Interest rate swaps	0	0
Total liabilities	5,227,198	5,102,751
Stockholders’ Equity:
Common stock	1,453	1,452
Additional paid-in capital	3,679,578	3,676,000
Cumulative distributions in excess of earnings	(3,792,357)	(3,833,873)
Other comprehensive loss income	0	0
Piedmont stockholders’ equity	(111,326)	(156,421)
Noncontrolling interest	0	0
Total stockholders’ equity	(111,326)	(156,421)
Total liabilities and stockholders’ equity	5,115,872	4,946,330
Non-Guarantor Subsidiaries
Assets:
Land	571,005	571,005
Buildings and improvements, less accumulated depreciation	2,516,763	2,526,212
Intangible lease assets, less accumulated amortization	78,383	98,970
Construction in progress	8,160	34,669
Real estate assets held for sale, net		225,939
Total real estate assets	3,174,311	3,456,795
Investments in and amounts due from unconsolidated joint ventures	0	0
Cash and cash equivalents	10,074	3,168	$ 2,291	$ 3,117
Tenant and straight-line rent receivables, net	177,855	170,124
Advances to affiliates	0	0
Investment in subsidiary	177	181
Note receivable	144,500	95,790
Prepaid expenses, restricted cash, escrows, and other assets	25,358	20,121
Goodwill	0	0
Interest rate swaps	0
Deferred lease costs, net	260,957	282,145
Other assets held for sale, net		9,815
Total assets	3,793,232	4,038,139
Liabilities:
Debt, net	425,409	503,242
Accounts payable, accrued expenses, and accrued capital expenditures	91,731	118,712
Advances from affiliates	1,915,105	2,098,146
Deferred income	26,242	23,200
Intangible lease liabilities, net	41,064	48,005
Interest rate swaps	0	0
Total liabilities	2,499,551	2,791,305
Stockholders’ Equity:
Common stock	0	0
Additional paid-in capital	1,304	1,309
Cumulative distributions in excess of earnings	1,290,513	1,243,643
Other comprehensive loss income	0	0
Piedmont stockholders’ equity	1,291,817	1,244,952
Noncontrolling interest	1,864	1,882
Total stockholders’ equity	1,293,681	1,246,834
Total liabilities and stockholders’ equity	$ 3,793,232	$ 4,038,139

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Guarantor and Non-Guarantor Financial Information (Condensed Consolidated Statements of Income) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Revenues:
Rental income	$ 113,350	$ 113,821	$ 361,048	$ 340,326
Tenant reimbursements	23,796	24,163	72,340	70,000
Property management fee revenue	441	501	1,341	1,478
Total revenues	137,587	138,485	434,729	411,804
Expenses:
Property operating costs	54,090	54,867	165,253	161,438
Depreciation	30,000	31,610	90,827	94,948
Amortization	18,123	18,640	57,852	53,848
Impairment loss on real estate assets	0	22,951	0	33,901
General and administrative	6,618	7,429	23,250	23,518
Operating expenses	108,831	135,497	337,182	367,653
Real estate operating income	28,756	2,988	97,547	44,151
Other income (expense):
Interest expense	(16,183)	(15,496)	(52,661)	(48,294)
Other income/(expense)	290	(720)	228	(467)
Net recoveries from casualty events	0	34	0	34
Equity in income of unconsolidated joint ventures	3,754	129	3,872	354
Other income (expense)	(12,139)	(16,053)	(48,561)	(48,373)
Income/(loss) from continuing operations	16,617	(13,065)	48,986	(4,222)
Discontinued operations:
Operating income	0	1	0	0
Income from discontinued operations	0	1	0	0
Gain/(loss) on sale of real estate assets, net	109,512	(57)	115,951	73,758
Net income/(loss)	126,129	(13,121)	164,937	69,536
Plus: Net income applicable to noncontrolling interest	4	14	10	7	$ 15
Net income/(loss) applicable to Piedmont	126,133	(13,107)	164,947	69,543	$ 99,732
Eliminations
Revenues:
Rental income	(426)	(464)	(1,370)	(1,983)
Tenant reimbursements	(142)	(237)	(373)	(405)
Property management fee revenue	(4,112)	(3,484)	(12,412)	(11,002)
Total revenues	(4,680)	(4,185)	(14,155)	(13,390)
Expenses:
Property operating costs	(4,680)	(4,240)	(14,155)	(13,514)
Depreciation	0	0	0	0
Amortization	0	0	0	0
Impairment loss on real estate assets		0		0
General and administrative	0	(8,857)	0	(28,416)
Operating expenses	(4,680)	(13,097)	(14,155)	(41,930)
Real estate operating income	0	8,912	0	28,540
Other income (expense):
Interest expense	3,966	3,252	11,256	8,219
Other income/(expense)	(3,966)	(3,252)	(11,256)	(8,219)
Net recoveries from casualty events		0		0
Equity in income of unconsolidated joint ventures	0	0	0	0
Other income (expense)	0	0	0	0
Income/(loss) from continuing operations	0	8,912	0	28,540
Discontinued operations:
Operating income	0	0	0	0
Income from discontinued operations	0	0	0	0
Gain/(loss) on sale of real estate assets, net	0	0	0	0
Net income/(loss)	0	8,912	0	28,540
Plus: Net income applicable to noncontrolling interest	0	0	0	0
Net income/(loss) applicable to Piedmont	0	8,912	0	28,540
Issuer
Revenues:
Rental income	10,232	12,862	32,749	42,990
Tenant reimbursements	2,376	3,430	8,341	10,455
Property management fee revenue	0	0	0	0
Total revenues	12,608	16,292	41,090	53,445
Expenses:
Property operating costs	5,372	7,820	17,027	24,583
Depreciation	3,199	3,617	9,943	12,993
Amortization	740	863	2,399	2,854
Impairment loss on real estate assets		0		8,259
General and administrative	1,539	7,187	4,798	22,802
Operating expenses	10,850	19,487	34,167	71,491
Real estate operating income	1,758	(3,195)	6,923	(18,046)
Other income (expense):
Interest expense	(13,795)	(11,799)	(43,049)	(36,159)
Other income/(expense)	2,404	2,608	6,873	7,008
Net recoveries from casualty events		0		0
Equity in income of unconsolidated joint ventures	3,754	129	3,872	354
Other income (expense)	(7,637)	(9,062)	(32,304)	(28,797)
Income/(loss) from continuing operations	(5,879)	(12,257)	(25,381)	(46,843)
Discontinued operations:
Operating income	0	0	0	0
Income from discontinued operations	0	0	0	0
Gain/(loss) on sale of real estate assets, net	(4)	134	6,430	30,096
Net income/(loss)	(5,883)	(12,123)	(18,951)	(16,747)
Plus: Net income applicable to noncontrolling interest	0	0	0	0
Net income/(loss) applicable to Piedmont	(5,883)	(12,123)	(18,951)	(16,747)
Guarantor
Revenues:
Rental income	0	0	0	0
Tenant reimbursements	0	0	0	0
Property management fee revenue	0	0	0	0
Total revenues	0	0	0	0
Expenses:
Property operating costs	0	0	0	0
Depreciation	0	0	0	0
Amortization	0	0	0	0
Impairment loss on real estate assets		0		0
General and administrative	77	83	261	251
Operating expenses	77	83	261	251
Real estate operating income	(77)	(83)	(261)	(251)
Other income (expense):
Interest expense	0	0	0	0
Other income/(expense)	0	0	0	282
Net recoveries from casualty events		0		0
Equity in income of unconsolidated joint ventures	0	0	0	0
Other income (expense)	0	0	0	282
Income/(loss) from continuing operations	(77)	(83)	(261)	31
Discontinued operations:
Operating income	0	0	0	0
Income from discontinued operations	0	0	0	0
Gain/(loss) on sale of real estate assets, net	0	0	0	0
Net income/(loss)	(77)	(83)	(261)	31
Plus: Net income applicable to noncontrolling interest	0	0	0	0
Net income/(loss) applicable to Piedmont	(77)	(83)	(261)	31
Non-Guarantor Subsidiaries
Revenues:
Rental income	103,544	101,423	329,669	299,319
Tenant reimbursements	21,562	20,970	64,372	59,950
Property management fee revenue	4,553	3,985	13,753	12,480
Total revenues	129,659	126,378	407,794	371,749
Expenses:
Property operating costs	53,398	51,287	162,381	150,369
Depreciation	26,801	27,993	80,884	81,955
Amortization	17,383	17,777	55,453	50,994
Impairment loss on real estate assets		22,951		25,642
General and administrative	5,002	9,016	18,191	28,881
Operating expenses	102,584	129,024	316,909	337,841
Real estate operating income	27,075	(2,646)	90,885	33,908
Other income (expense):
Interest expense	(6,354)	(6,949)	(20,868)	(20,354)
Other income/(expense)	1,852	(76)	4,611	462
Net recoveries from casualty events		34		34
Equity in income of unconsolidated joint ventures	0	0	0	0
Other income (expense)	(4,502)	(6,991)	(16,257)	(19,858)
Income/(loss) from continuing operations	22,573	(9,637)	74,628	14,050
Discontinued operations:
Operating income	0	1	0	0
Income from discontinued operations	0	1	0	0
Gain/(loss) on sale of real estate assets, net	109,516	(191)	109,521	43,662
Net income/(loss)	132,089	(9,827)	184,149	57,712
Plus: Net income applicable to noncontrolling interest	4	14	10	7
Net income/(loss) applicable to Piedmont	$ 132,093	$ (9,813)	$ 184,159	$ 57,719

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Guarantor and Non-Guarantor Financial Information (Condensed Consolidated Statements of Cash Flows) (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Condensed Financial Statements, Captions [Line Items]
Net Cash Provided by Operating Activities	$ 176,332	$ 172,036
Cash Flows from Investing Activities:
Investment in real estate assets and real estate related intangibles, net of accruals	(65,407)	(321,139)
Intercompany note receivable	0	0
Net sales proceeds from wholly-owned properties	375,199	304,902
Net sales proceeds from unconsolidated joint ventures	12,334	0
Investments in unconsolidated joint ventures	(1,162)	0
Deferred lease costs paid	(19,419)	(15,345)
Net cash provided by/(used in) investing activities	301,545	(31,582)
Cash Flows from Financing Activities:
Debt issuance costs paid	(101)	(212)
Proceeds from debt	147,000	552,000
Repayments of debt	(466,046)	(589,532)
Intercompany note payable	0	0
Costs of issuance of common stock	(97)	(239)
Value of shares withheld to pay tax obligations related to employee stock compensation	(3,385)	(2,328)
Repurchases of common stock as part of announced plan	(3,895)	(7,943)
(Distributions to)/repayments from affiliates	0	0
Dividends paid and discount on dividend reinvestments	(122,237)	(91,609)
Net cash used in financing activities	(448,761)	(139,863)
Net increase in cash and cash equivalents	29,116	591
Cash and cash equivalents, beginning of period	6,992	5,441
Cash and cash equivalents, end of period	36,108	6,032
Eliminations
Condensed Financial Statements, Captions [Line Items]
Net Cash Provided by Operating Activities	0	28,540
Cash Flows from Investing Activities:
Investment in real estate assets and real estate related intangibles, net of accruals	0	0
Intercompany note receivable	48,710	71,460
Net sales proceeds from wholly-owned properties	0	0
Net sales proceeds from unconsolidated joint ventures	0
Investments in unconsolidated joint ventures	0
Deferred lease costs paid	0	0
Net cash provided by/(used in) investing activities	48,710	71,460
Cash Flows from Financing Activities:
Debt issuance costs paid	0	0
Proceeds from debt	0	0
Repayments of debt	0	0
Intercompany note payable	(48,710)	(71,460)
Costs of issuance of common stock	0	0
Value of shares withheld to pay tax obligations related to employee stock compensation	0	0
Repurchases of common stock as part of announced plan	0	0
(Distributions to)/repayments from affiliates	0	(28,540)
Dividends paid and discount on dividend reinvestments	0	0
Net cash used in financing activities	(48,710)	(100,000)
Net increase in cash and cash equivalents	0	0
Cash and cash equivalents, beginning of period	0	0
Cash and cash equivalents, end of period	0	0
Issuer
Condensed Financial Statements, Captions [Line Items]
Net Cash Provided by Operating Activities	(15,467)	(18,977)
Cash Flows from Investing Activities:
Investment in real estate assets and real estate related intangibles, net of accruals	(793)	(24,255)
Intercompany note receivable	0	440
Net sales proceeds from wholly-owned properties	23,028	187,192
Net sales proceeds from unconsolidated joint ventures	12,334
Investments in unconsolidated joint ventures	(1,162)
Deferred lease costs paid	(858)	(2,021)
Net cash provided by/(used in) investing activities	32,549	161,356
Cash Flows from Financing Activities:
Debt issuance costs paid	(102)	(212)
Proceeds from debt	147,000	552,000
Repayments of debt	(325,000)	(421,000)
Intercompany note payable	(14,289)	(9,600)
Costs of issuance of common stock	0	0
Value of shares withheld to pay tax obligations related to employee stock compensation	0	0
Repurchases of common stock as part of announced plan	0	0
(Distributions to)/repayments from affiliates	197,519	(262,150)
Dividends paid and discount on dividend reinvestments	0	0
Net cash used in financing activities	5,128	(140,962)
Net increase in cash and cash equivalents	22,210	1,417
Cash and cash equivalents, beginning of period	3,674	2,174
Cash and cash equivalents, end of period	25,884	3,591
Guarantor
Condensed Financial Statements, Captions [Line Items]
Net Cash Provided by Operating Activities	4,335	4,121
Cash Flows from Investing Activities:
Investment in real estate assets and real estate related intangibles, net of accruals	0	0
Intercompany note receivable	0	0
Net sales proceeds from wholly-owned properties	0	0
Net sales proceeds from unconsolidated joint ventures	0
Investments in unconsolidated joint ventures	0
Deferred lease costs paid	0	0
Net cash provided by/(used in) investing activities	0	0
Cash Flows from Financing Activities:
Debt issuance costs paid	0	0
Proceeds from debt	0	0
Repayments of debt	0	0
Intercompany note payable	0	0
Costs of issuance of common stock	(97)	(239)
Value of shares withheld to pay tax obligations related to employee stock compensation	(3,385)	(2,328)
Repurchases of common stock as part of announced plan	(3,895)	(7,943)
(Distributions to)/repayments from affiliates	125,271	97,990
Dividends paid and discount on dividend reinvestments	(122,229)	(91,601)
Net cash used in financing activities	(4,335)	(4,121)
Net increase in cash and cash equivalents	0	0
Cash and cash equivalents, beginning of period	150	150
Cash and cash equivalents, end of period	150	150
Non-Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Net Cash Provided by Operating Activities	187,464	158,352
Cash Flows from Investing Activities:
Investment in real estate assets and real estate related intangibles, net of accruals	(64,614)	(296,884)
Intercompany note receivable	(48,710)	(71,900)
Net sales proceeds from wholly-owned properties	352,171	117,710
Net sales proceeds from unconsolidated joint ventures	0
Investments in unconsolidated joint ventures	0
Deferred lease costs paid	(18,561)	(13,324)
Net cash provided by/(used in) investing activities	220,286	(264,398)
Cash Flows from Financing Activities:
Debt issuance costs paid	1	0
Proceeds from debt	0	0
Repayments of debt	(141,046)	(168,532)
Intercompany note payable	62,999	81,060
Costs of issuance of common stock	0	0
Value of shares withheld to pay tax obligations related to employee stock compensation	0	0
Repurchases of common stock as part of announced plan	0	0
(Distributions to)/repayments from affiliates	(322,790)	192,700
Dividends paid and discount on dividend reinvestments	(8)	(8)
Net cash used in financing activities	(400,844)	105,220
Net increase in cash and cash equivalents	6,906	(826)
Cash and cash equivalents, beginning of period	3,168	3,117
Cash and cash equivalents, end of period	$ 10,074	$ 2,291

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Subsequent Events (Details)	Oct. 31, 2017 $ / shares
Subsequent Event
Subsequent Event [Line Items]
Dividends declared (in dollars per share)	$ 0.21