Segment Information - Reconciliation of GAAP Net Income to NOI (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Segment Reporting [Abstract]
Net income/(loss) applicable to Piedmont	$ (1,367)	$ 59,964
Management fee revenue	(293)	(362)
Depreciation and amortization	57,828	53,767
General and administrative expenses	7,691	7,595
Interest expense	22,077	13,898
Other income	(1,440)	(1,808)
Gain on sale of real estate assets	0	(50,673)
Net income applicable to noncontrolling interests	3	0
NOI	$ 84,499	$ 82,381