Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Statement of Financial Position [Abstract]
Common stock, par value (in USD per share)	$ 0.01	$ 0.01
Common stock, shares authorized	500,000,000
Common stock, shares issued	24,364,814	25,346,916
Treasury stock, shares	2,495,172	2,584,119
Accounts Receivable, Allowance for Credit Loss, Current	$ 8,827	$ 7,680
Unbilled Services, Allowance for Credit Losses	$ 2,637	$ 2,603