Condensed Consolidated Statements of Operations (unaudited) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Revenue		$ 477,915	$ 467,079	$ 945,513	$ 923,377
Costs and expenses:
Cost of services, exclusive of depreciation and amortization		339,273	329,836	676,263	657,914
General and administrative, exclusive of depreciation and amortization	[1]	36,828	37,003	73,737	71,653
Depreciation and amortization		17,870	18,283	36,355	36,593
Total costs and expenses		393,971	385,122	786,355	766,160
Other operating income		0	151	284	151
Income from operations		83,944	82,108	159,442	157,368
Other income and expense:
Equity in losses of unconsolidated subsidiaries		(3,676)	0	(3,676)	(526)
Interest income (expense)		205	17	94	(44)
Income before income taxes		71,155	70,625	136,571	134,222
Income tax expense		18,096	16,593	33,233	32,759
Net income		53,059	54,032	103,338	101,463
Less: Net income attributable to non-controlling interests		1,322	1,290	2,645	2,457
Net income attributable to the Company		$ 51,737	$ 52,742	$ 100,693	$ 99,006
Earnings per common share (Note 9):
Basic (in dollars per share)		$ 0.50	$ 0.51	$ 0.97	$ 0.95
Diluted (in dollars per share)		$ 0.50	$ 0.51	$ 0.97	$ 0.95
Related Party
Other income and expense:
Interest expense on related party debt		$ (9,318)	$ (11,500)	$ (19,289)	$ (22,576)

[1] Includes the shared service fee from related party of $3.8 million and $3.7 million for the three months ended June 30, 2024 and 2023, respectively, and $7.7 million and $7.3 million for the six months ended June 30, 2024 and 2023, respectively. See Note 10, Related Party Transactions, for additional information.