Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands		Dec. 31, 2021	Dec. 31, 2020
Statement Of Financial Position [Abstract]
Property and equipment, accumulated depreciation	[1]	$ 113,711	$ 101,380
Intangible assets, amortization		$ 8,662	$ 4,178
Preferred stock, par value		$ 0.01	$ 0.01
Preferred stock, shares authorized		1,000,000	1,000,000
Preferred stock, shares issued		0	0
Preferred stock, shares outstanding		0	0
Common stock, par value		$ 0.01	$ 0.01
Common stock, shares authorized		300,000,000	300,000,000
Common stock, shares issued		88,724,438	87,264,910
Common stock, shares outstanding		68,748,662	70,062,364
Treasury stock, shares		19,975,776	17,202,546

[1] Property and equipment which were fully depreciated and no longer in use by the Company were retired during the years ended December 31, 2021 and 2020; therefore, both the cost of the asset and the related accumulated depreciation balances were reduced to zero for these assets.