Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Statement of Financial Position [Abstract]
Accounts receivable, allowances	$ 204	$ 682
Property and equipment, accumulated depreciation and amortization	$ 602,752	$ 567,027
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, authorized (in shares)	150,000,000	150,000,000
Common stock, issued (in shares)	62,086,595	61,840,434
Common stock, outstanding (in shares)	53,842,139	53,595,978
Treasury stock (in shares)	8,244,456	8,244,456