Revision of Prior Period Financial Statements - Schedule of Correction of Error Statements (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Deferred tax assets	$ 35,226	$ 30,840
Total assets	790,652	720,836	$ 779,889
Accrued payroll and related taxes	56,142	53,099
Total current liabilities	216,928	189,014
Retained earnings	185,010	146,602
Total liabilities and stockholders' equity	790,652	720,836
Costs of services provided	1,456,643	1,496,865	1,411,393
Income before income taxes	53,056	44,553	65,512
Income tax provision	14,670	10,310	16,969
Net income	$ 38,386	$ 34,243	$ 48,543
Basic earnings per common share (in dollars per share)	$ 0.52	$ 0.46	$ 0.65
Diluted earnings per common share (in dollars per share)	$ 0.52	$ 0.46	$ 0.65
Reduction in retained earnings	$ (185,010)	$ (146,602)
As reported
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Deferred tax assets		28,338
Total assets		718,334
Accrued payroll and related taxes		42,704
Total current liabilities		178,619
Retained earnings		154,495
Total liabilities and stockholders' equity		718,334
Costs of services provided		1,496,336	$ 1,415,082
Income before income taxes		45,082	61,823
Income tax provision		10,452	15,960
Net income		$ 34,630	$ 45,863
Basic earnings per common share (in dollars per share)		$ 0.47	$ 0.61
Diluted earnings per common share (in dollars per share)		$ 0.47	$ 0.61
Reduction in retained earnings		$ (154,495)
Adjustment
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Deferred tax assets		2,502
Total assets		2,502
Accrued payroll and related taxes		10,395
Total current liabilities		10,395
Retained earnings		(7,893)	$ (7,500)	$ (10,200)
Total liabilities and stockholders' equity		2,502
Costs of services provided		529	(3,689)
Income before income taxes		(529)	3,689
Income tax provision		(142)	1,009
Net income		$ (387)	$ 2,680
Basic earnings per common share (in dollars per share)		$ (0.01)	$ 0.04
Diluted earnings per common share (in dollars per share)		$ (0.01)	$ 0.04
Reduction in retained earnings		$ 7,893	$ 7,500	$ 10,200