CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (UNAUDITED) - USD ($) $ in Thousands	Total	Common  Stock	Additional Paid-In Capital	Cumulative Distributions in Excess of Earnings	Accumulated Other Comprehensive Income/(Loss)	Non- controlling Interest
Beginning balance (in shares) at Dec. 31, 2021		123,077,000
Beginning balance at Dec. 31, 2021	$ 1,787,423	$ 1,231	$ 3,701,798	$ (1,899,081)	$ (18,154)	$ 1,629
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Costs of issuance of common stock	(461)		(461)
Dividends to common stockholders and stockholders of subsidiaries	(77,751)			(77,724)		(27)
Shares issued and amortized under the 2007 Omnibus Incentive Plan, net of tax (in shares)		318,000
Shares issued and amortized under the 2007 Omnibus Incentive Plan, net of tax	7,900	$ 3	7,897
Net income/(loss) attributable to noncontrolling interest	(1)					(1)
Net income/(loss) applicable to Piedmont	71,261			71,261
Other comprehensive income	8,960				8,960
Ending balance (in shares) at Sep. 30, 2022		123,395,000
Ending balance at Sep. 30, 2022	1,797,331	$ 1,234	3,709,234	(1,905,544)	(9,194)	1,601
Beginning balance (in shares) at Jun. 30, 2022		123,390,000
Beginning balance at Jun. 30, 2022	1,815,663	$ 1,234	3,707,833	(1,882,962)	(12,050)	1,608
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Costs of issuance of common stock	(461)		(461)
Dividends to common stockholders and stockholders of subsidiaries	(25,920)			(25,913)		(7)
Shares issued and amortized under the 2007 Omnibus Incentive Plan, net of tax (in shares)		5,000
Shares issued and amortized under the 2007 Omnibus Incentive Plan, net of tax	1,862		1,862
Net income/(loss) attributable to noncontrolling interest	0
Net income/(loss) applicable to Piedmont	3,331			3,331
Other comprehensive income	2,856				2,856
Ending balance (in shares) at Sep. 30, 2022		123,395,000
Ending balance at Sep. 30, 2022	$ 1,797,331	$ 1,234	3,709,234	(1,905,544)	(9,194)	1,601
Beginning balance (in shares) at Dec. 31, 2022	123,439,558	123,440,000
Beginning balance at Dec. 31, 2022	$ 1,849,255	$ 1,234	3,711,005	(1,855,893)	(8,679)	1,588
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends to common stockholders and stockholders of subsidiaries	(67,428)			(67,402)		(26)
Shares issued and amortized under the 2007 Omnibus Incentive Plan, net of tax (in shares)		256,000
Shares issued and amortized under the 2007 Omnibus Incentive Plan, net of tax	3,627	$ 3	3,624
Net income/(loss) attributable to noncontrolling interest	7					7
Net income/(loss) applicable to Piedmont	(20,357)			(20,357)
Other comprehensive income	$ 1,961				1,961
Ending balance (in shares) at Sep. 30, 2023	123,696,475	123,696,000
Ending balance at Sep. 30, 2023	$ 1,767,065	$ 1,237	3,714,629	(1,943,652)	(6,718)	1,569
Beginning balance (in shares) at Jun. 30, 2023		123,692,000
Beginning balance at Jun. 30, 2023	1,797,334	$ 1,237	3,712,688	(1,911,188)	(6,977)	1,574
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends to common stockholders and stockholders of subsidiaries	(15,468)			(15,462)		(6)
Shares issued and amortized under the 2007 Omnibus Incentive Plan, net of tax (in shares)		4,000
Shares issued and amortized under the 2007 Omnibus Incentive Plan, net of tax	1,941		1,941
Net income/(loss) attributable to noncontrolling interest	1					1
Net income/(loss) applicable to Piedmont	(17,002)			(17,002)
Other comprehensive income	$ 259				259
Ending balance (in shares) at Sep. 30, 2023	123,696,475	123,696,000
Ending balance at Sep. 30, 2023	$ 1,767,065	$ 1,237	$ 3,714,629	$ (1,943,652)	$ (6,718)	$ 1,569