Reportable Segments - Net Operating Income (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]
Net Operating Income	$ 131,844	$ 123,051	$ 261,980	$ 242,658
Office
Segment Reporting Information [Line Items]
Net Operating Income	130,397	121,164	259,101	238,984
Non-Office
Segment Reporting Information [Line Items]
Net Operating Income	1,447	1,887	2,879	3,674
Atlanta
Segment Reporting Information [Line Items]
Net Operating Income	48,652	46,756	96,312	91,164
Atlanta | Office
Segment Reporting Information [Line Items]
Net Operating Income	48,368	46,506	95,758	90,679
Atlanta | Non-Office
Segment Reporting Information [Line Items]
Net Operating Income	284	250	554	485
Austin
Segment Reporting Information [Line Items]
Net Operating Income	42,530	36,565	82,803	72,932
Austin | Office
Segment Reporting Information [Line Items]
Net Operating Income	42,530	36,565	82,803	72,932
Austin | Non-Office
Segment Reporting Information [Line Items]
Net Operating Income	0	0	0	0
Charlotte
Segment Reporting Information [Line Items]
Net Operating Income	11,927	11,218	23,851	21,873
Charlotte | Office
Segment Reporting Information [Line Items]
Net Operating Income	10,764	10,246	21,526	20,258
Charlotte | Non-Office
Segment Reporting Information [Line Items]
Net Operating Income	1,163	972	2,325	1,615
Dallas
Segment Reporting Information [Line Items]
Net Operating Income	3,218	3,191	6,443	6,498
Dallas | Office
Segment Reporting Information [Line Items]
Net Operating Income	3,218	3,191	6,443	6,498
Dallas | Non-Office
Segment Reporting Information [Line Items]
Net Operating Income	0	0	0	0
Phoenix
Segment Reporting Information [Line Items]
Net Operating Income	10,250	9,868	22,023	18,843
Phoenix | Office
Segment Reporting Information [Line Items]
Net Operating Income	10,250	9,868	22,023	18,843
Phoenix | Non-Office
Segment Reporting Information [Line Items]
Net Operating Income	0	0	0	0
Tampa
Segment Reporting Information [Line Items]
Net Operating Income	11,661	10,643	23,372	21,334
Tampa | Office
Segment Reporting Information [Line Items]
Net Operating Income	11,661	10,643	23,372	21,334
Tampa | Non-Office
Segment Reporting Information [Line Items]
Net Operating Income	0	0	0	0
Other markets
Segment Reporting Information [Line Items]
Net Operating Income	3,606	4,810	7,176	10,014
Other markets | Office
Segment Reporting Information [Line Items]
Net Operating Income	3,606	4,145	7,176	8,440
Other markets | Non-Office
Segment Reporting Information [Line Items]
Net Operating Income	$ 0	$ 665	$ 0	$ 1,574