Reportable Segments - Segment Revenues (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Segment Reporting Information [Line Items]
Total Revenues	$ 209,241	$ 202,728
Rental Property Revenues
Segment Reporting Information [Line Items]
Total Revenues	208,818	200,076
Rental Property Revenues | Office
Segment Reporting Information [Line Items]
Total Revenues	207,173	198,315
Rental Property Revenues | Non-Office
Segment Reporting Information [Line Items]
Total Revenues	1,645	1,761
Operating Segments | Rental Property Revenues
Segment Reporting Information [Line Items]
Total Revenues	211,085	202,192
Operating Segments | Rental Property Revenues | Office
Segment Reporting Information [Line Items]
Total Revenues	208,963	199,974
Operating Segments | Rental Property Revenues | Non-Office
Segment Reporting Information [Line Items]
Total Revenues	2,122	2,218
Operating Segments | Rental Property Revenues | Atlanta
Segment Reporting Information [Line Items]
Total Revenues	77,333	72,589
Operating Segments | Rental Property Revenues | Atlanta | Office
Segment Reporting Information [Line Items]
Total Revenues	76,856	72,132
Operating Segments | Rental Property Revenues | Atlanta | Non-Office
Segment Reporting Information [Line Items]
Total Revenues	477	457
Operating Segments | Rental Property Revenues | Austin
Segment Reporting Information [Line Items]
Total Revenues	71,005	67,883
Operating Segments | Rental Property Revenues | Austin | Office
Segment Reporting Information [Line Items]
Total Revenues	71,005	67,883
Operating Segments | Rental Property Revenues | Austin | Non-Office
Segment Reporting Information [Line Items]
Total Revenues	0	0
Operating Segments | Rental Property Revenues | Charlotte
Segment Reporting Information [Line Items]
Total Revenues	16,028	16,579
Operating Segments | Rental Property Revenues | Charlotte | Office
Segment Reporting Information [Line Items]
Total Revenues	14,383	14,818
Operating Segments | Rental Property Revenues | Charlotte | Non-Office
Segment Reporting Information [Line Items]
Total Revenues	1,645	1,761
Operating Segments | Rental Property Revenues | Dallas
Segment Reporting Information [Line Items]
Total Revenues	4,440	4,187
Operating Segments | Rental Property Revenues | Dallas | Office
Segment Reporting Information [Line Items]
Total Revenues	4,440	4,187
Operating Segments | Rental Property Revenues | Dallas | Non-Office
Segment Reporting Information [Line Items]
Total Revenues	0	0
Operating Segments | Rental Property Revenues | Phoenix
Segment Reporting Information [Line Items]
Total Revenues	14,602	15,583
Operating Segments | Rental Property Revenues | Phoenix | Office
Segment Reporting Information [Line Items]
Total Revenues	14,602	15,583
Operating Segments | Rental Property Revenues | Phoenix | Non-Office
Segment Reporting Information [Line Items]
Total Revenues	0	0
Operating Segments | Rental Property Revenues | Tampa
Segment Reporting Information [Line Items]
Total Revenues	19,385	18,748
Operating Segments | Rental Property Revenues | Tampa | Office
Segment Reporting Information [Line Items]
Total Revenues	19,385	18,748
Operating Segments | Rental Property Revenues | Tampa | Non-Office
Segment Reporting Information [Line Items]
Total Revenues	0	0
Operating Segments | Rental Property Revenues | Other markets
Segment Reporting Information [Line Items]
Total Revenues	8,292	6,623
Operating Segments | Rental Property Revenues | Other markets | Office
Segment Reporting Information [Line Items]
Total Revenues	8,292	6,623
Operating Segments | Rental Property Revenues | Other markets | Non-Office
Segment Reporting Information [Line Items]
Total Revenues	0	0
Segment Reconciling Items | Rental Property Revenues
Segment Reporting Information [Line Items]
Total Revenues	(2,267)	(2,116)
Segment Reconciling Items | Rental Property Revenues | Office
Segment Reporting Information [Line Items]
Total Revenues	(1,790)	(1,659)
Segment Reconciling Items | Rental Property Revenues | Non-Office
Segment Reporting Information [Line Items]
Total Revenues	$ (477)	$ (457)