Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Statement of Financial Position [Abstract]
Allowance for Doubtful Accounts Receivable, Current	$ 5,642	$ 3,144
Common stock, par value	$ 0.01	$ 0.01
Common stock, authorized	75,000,000	75,000,000
Common stock, shares issued	28,243,000	28,133,000
Common stock, shares outstanding	25,156,000	25,046,000
Treasury stock, shares	3,087,000	3,087,000