Reportable Segments - Segment Revenues (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Segment Reporting Information [Line Items]
Total Revenues	$ 248,326	$ 209,212	$ 738,782	$ 631,431
Rental property operating expenses	80,023	66,005	231,358	207,714
Net Operating Income	169,182	142,076	501,111	422,016
Operating segments
Segment Reporting Information [Line Items]
Rental property operating expenses	82,873	67,703	239,019	211,094
Net Operating Income	169,182	142,076	501,111	422,016
Operating segments \| Office
Segment Reporting Information [Line Items]
Rental property operating expenses	81,341	66,390	234,250	208,186
Net Operating Income	166,966	140,896	495,734	418,039
Operating segments \| Office \| Austin
Segment Reporting Information [Line Items]
Rental property operating expenses	28,053	20,803	81,469	71,606
Net Operating Income	60,243	48,261	180,793	142,065
Operating segments \| Office \| Atlanta
Segment Reporting Information [Line Items]
Rental property operating expenses	30,043	27,612	86,660	81,081
Net Operating Income	52,527	49,868	156,648	148,741
Operating segments \| Office \| Charlotte
Segment Reporting Information [Line Items]
Rental property operating expenses	5,890	4,169	17,235	12,222
Net Operating Income	15,590	9,684	49,354	29,833
Operating segments \| Office \| Tampa
Segment Reporting Information [Line Items]
Rental property operating expenses	7,266	5,896	21,477	20,505
Net Operating Income	13,006	12,657	39,391	36,939
Operating segments \| Office \| Phoenix
Segment Reporting Information [Line Items]
Rental property operating expenses	4,355	4,284	12,590	11,731
Net Operating Income	12,166	10,867	36,168	32,853
Operating segments \| Office \| Dallas
Segment Reporting Information [Line Items]
Rental property operating expenses	2,195	859	4,102	2,760
Net Operating Income	7,083	3,563	14,341	10,432
Operating segments \| Office \| Other
Segment Reporting Information [Line Items]
Rental property operating expenses	3,539	2,767	10,717	8,281
Net Operating Income	6,351	5,996	19,039	17,176
Operating segments \| Non-Office
Segment Reporting Information [Line Items]
Rental property operating expenses	1,532	1,313	4,769	2,908
Net Operating Income	2,216	1,180	5,377	3,977
Segment reconciling items
Segment Reporting Information [Line Items]
Rental property operating expenses	(2,850)	(1,698)	(7,661)	(3,380)
Rental property revenues
Segment Reporting Information [Line Items]
Total Revenues	246,461	207,260	727,203	627,552
Rental property revenues \| Operating segments
Segment Reporting Information [Line Items]
Total Revenues	252,055	209,779	740,130	633,110
Rental property revenues \| Operating segments \| Office
Segment Reporting Information [Line Items]
Total Revenues	248,307	207,286	729,984	626,225
Rental property revenues \| Operating segments \| Office \| Austin
Segment Reporting Information [Line Items]
Total Revenues	88,296	69,064	262,262	213,671
Rental property revenues \| Operating segments \| Office \| Atlanta
Segment Reporting Information [Line Items]
Total Revenues	82,570	77,480	243,308	229,822
Rental property revenues \| Operating segments \| Office \| Charlotte
Segment Reporting Information [Line Items]
Total Revenues	21,480	13,853	66,589	42,055
Rental property revenues \| Operating segments \| Office \| Tampa
Segment Reporting Information [Line Items]
Total Revenues	20,272	18,553	60,868	57,444
Rental property revenues \| Operating segments \| Office \| Phoenix
Segment Reporting Information [Line Items]
Total Revenues	16,521	15,151	48,758	44,584
Rental property revenues \| Operating segments \| Office \| Dallas
Segment Reporting Information [Line Items]
Total Revenues	9,278	4,422	18,443	13,192
Rental property revenues \| Operating segments \| Office \| Other
Segment Reporting Information [Line Items]
Total Revenues	9,890	8,763	29,756	25,457
Rental property revenues \| Operating segments \| Non-Office
Segment Reporting Information [Line Items]
Total Revenues	3,748	2,493	10,146	6,885
Rental property revenues \| Segment reconciling items
Segment Reporting Information [Line Items]
Total Revenues	(6,106)	(3,414)	(16,305)	(8,009)
Termination fee income
Segment Reporting Information [Line Items]
Total Revenues	$ 512	$ 895	$ 3,378	$ 2,451