Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) shares in Thousands, $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Statement of Financial Position [Abstract]
Accounts receivable, allowance for doubtful accounts	$ 2,758	$ 3,830
Common stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Common stock, shares authorized (in shares)	200,000	200,000
Common stock, shares issued (in shares)	64,831	64,820
Common stock, shares outstanding (in shares)	52,143	52,133
Treasury stock at cost (in shares)	12,688	12,688