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, 2020		123,839,000
Beginning balance at Dec. 31, 2020	$ 1,897,961	$ 1,238	$ 3,693,996	$ (1,774,856)	$ (24,100)	$ 1,683
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Costs of issuance of common stock	(55)		(55)
Dividends to common stockholders and stockholders of subsidiaries	(52,135)			(52,114)		(21)
Shares issued and amortized under the 2007 Omnibus Incentive Plan, net of tax (in shares)		293,000
Shares issued and amortized under the 2007 Omnibus Incentive Plan, net of tax	4,718	$ 3	4,715
Net loss applicable to noncontrolling interests	(4)					(4)
Net income applicable to Piedmont	19,291			19,291
Other comprehensive income	2,732				2,732
Ending balance (in shares) at Jun. 30, 2021		124,132,000
Ending balance at Jun. 30, 2021	1,872,508	$ 1,241	3,698,656	(1,807,679)	(21,368)	1,658
Beginning balance (in shares) at Mar. 31, 2021		124,029,000
Beginning balance at Mar. 31, 2021	1,887,345	$ 1,240	3,697,801	(1,791,558)	(21,813)	1,675
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Costs of issuance of common stock	(55)		(55)
Dividends to common stockholders and stockholders of subsidiaries	(26,082)			(26,068)		(14)
Shares issued and amortized under the 2007 Omnibus Incentive Plan, net of tax (in shares)		103,000
Shares issued and amortized under the 2007 Omnibus Incentive Plan, net of tax	911	$ 1	910
Net loss applicable to noncontrolling interests	(3)					(3)
Net income applicable to Piedmont	9,947			9,947
Other comprehensive income	445				445
Ending balance (in shares) at Jun. 30, 2021		124,132,000
Ending balance at Jun. 30, 2021	$ 1,872,508	$ 1,241	3,698,656	(1,807,679)	(21,368)	1,658
Beginning balance (in shares) at Dec. 31, 2021	123,076,695	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]
Dividends to common stockholders and stockholders of subsidiaries	(51,831)			(51,811)		(20)
Shares issued and amortized under the 2007 Omnibus Incentive Plan, net of tax (in shares)		313,000
Shares issued and amortized under the 2007 Omnibus Incentive Plan, net of tax	6,038	$ 3	6,035
Net loss applicable to noncontrolling interests	(1)					(1)
Net income applicable to Piedmont	67,930			67,930
Other comprehensive income	$ 6,104				6,104
Ending balance (in shares) at Jun. 30, 2022	123,390,448	123,390,000
Ending balance at Jun. 30, 2022	$ 1,815,663	$ 1,234	3,707,833	(1,882,962)	(12,050)	1,608
Beginning balance (in shares) at Mar. 31, 2022		123,331,000
Beginning balance at Mar. 31, 2022	1,830,474	$ 1,233	3,706,207	(1,865,016)	(13,573)	1,623
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends to common stockholders and stockholders of subsidiaries	(25,926)			(25,912)		(14)
Shares issued and amortized under the 2007 Omnibus Incentive Plan, net of tax (in shares)		59,000
Shares issued and amortized under the 2007 Omnibus Incentive Plan, net of tax	1,627	$ 1	1,626
Net loss applicable to noncontrolling interests	(1)					(1)
Net income applicable to Piedmont	7,966			7,966
Other comprehensive income	$ 1,523				1,523
Ending balance (in shares) at Jun. 30, 2022	123,390,448	123,390,000
Ending balance at Jun. 30, 2022	$ 1,815,663	$ 1,234	$ 3,707,833	$ (1,882,962)	$ (12,050)	$ 1,608