Reportable Segments - Segment Revenues (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Segment Reporting Information [Line Items]
Total Revenues	$ 204,320	$ 185,680	$ 407,048	$ 372,578
Rental property revenues
Segment Reporting Information [Line Items]
Total Revenues	203,954	183,174	404,030	366,401
Rental property revenues | Office
Segment Reporting Information [Line Items]
Total Revenues	202,173	181,873	400,488	364,115
Rental property revenues | Non-Office
Segment Reporting Information [Line Items]
Total Revenues	1,781	1,301	3,542	2,286
Operating segments | Rental property revenues
Segment Reporting Information [Line Items]
Total Revenues	206,167	187,266	408,359	374,652
Operating segments | Rental property revenues | Office
Segment Reporting Information [Line Items]
Total Revenues	203,917	184,346	403,891	368,966
Operating segments | Rental property revenues | Non-Office
Segment Reporting Information [Line Items]
Total Revenues	2,250	2,920	4,468	5,686
Operating segments | Rental property revenues | Atlanta
Segment Reporting Information [Line Items]
Total Revenues	73,629	69,299	146,218	137,736
Operating segments | Rental property revenues | Atlanta | Office
Segment Reporting Information [Line Items]
Total Revenues	73,160	68,860	145,292	136,875
Operating segments | Rental property revenues | Atlanta | Non-Office
Segment Reporting Information [Line Items]
Total Revenues	469	439	926	861
Operating segments | Rental property revenues | Austin
Segment Reporting Information [Line Items]
Total Revenues	68,161	59,054	136,044	120,278
Operating segments | Rental property revenues | Austin | Office
Segment Reporting Information [Line Items]
Total Revenues	68,161	59,054	136,044	120,278
Operating segments | Rental property revenues | Austin | Non-Office
Segment Reporting Information [Line Items]
Total Revenues	0	0	0	0
Operating segments | Rental property revenues | Charlotte
Segment Reporting Information [Line Items]
Total Revenues	16,456	15,230	33,035	29,719
Operating segments | Rental property revenues | Charlotte | Office
Segment Reporting Information [Line Items]
Total Revenues	14,675	13,929	29,493	27,433
Operating segments | Rental property revenues | Charlotte | Non-Office
Segment Reporting Information [Line Items]
Total Revenues	1,781	1,301	3,542	2,286
Operating segments | Rental property revenues | Dallas
Segment Reporting Information [Line Items]
Total Revenues	4,225	4,132	8,412	8,328
Operating segments | Rental property revenues | Dallas | Office
Segment Reporting Information [Line Items]
Total Revenues	4,225	4,132	8,412	8,328
Operating segments | Rental property revenues | Dallas | Non-Office
Segment Reporting Information [Line Items]
Total Revenues	0	0	0	0
Operating segments | Rental property revenues | Phoenix
Segment Reporting Information [Line Items]
Total Revenues	18,220	13,533	33,803	26,963
Operating segments | Rental property revenues | Phoenix | Office
Segment Reporting Information [Line Items]
Total Revenues	18,220	13,533	33,803	26,963
Operating segments | Rental property revenues | Phoenix | Non-Office
Segment Reporting Information [Line Items]
Total Revenues	0	0	0	0
Operating segments | Rental property revenues | Tampa
Segment Reporting Information [Line Items]
Total Revenues	18,741	17,216	37,489	34,140
Operating segments | Rental property revenues | Tampa | Office
Segment Reporting Information [Line Items]
Total Revenues	18,741	17,216	37,489	34,140
Operating segments | Rental property revenues | Tampa | Non-Office
Segment Reporting Information [Line Items]
Total Revenues	0	0	0	0
Operating segments | Rental property revenues | Other markets
Segment Reporting Information [Line Items]
Total Revenues	6,735	8,802	13,358	17,488
Operating segments | Rental property revenues | Other markets | Office
Segment Reporting Information [Line Items]
Total Revenues	6,735	7,622	13,358	14,949
Operating segments | Rental property revenues | Other markets | Non-Office
Segment Reporting Information [Line Items]
Total Revenues	0	1,180	0	2,539
Segment reconciling items | Rental property revenues
Segment Reporting Information [Line Items]
Total Revenues	(2,213)	(4,092)	(4,329)	(8,251)
Segment reconciling items | Rental property revenues | Office
Segment Reporting Information [Line Items]
Total Revenues	(1,744)	(2,473)	(3,403)	(4,851)
Segment reconciling items | Rental property revenues | Non-Office
Segment Reporting Information [Line Items]
Total Revenues	$ (469)	$ (1,619)	$ (926)	$ (3,400)