Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Statement of Financial Position [Abstract]
Reserve for doubtful accounts	$ 7,454	$ 6,632
Common stock, shares authorized (in shares)	65,035,579	65,035,579
Common stock, shares issued (in shares)	60,992,259	60,729,289
Common stock, shares outstanding (in shares)	60,487,117	60,224,147
Treasury stock, cost (in shares)	505,142	505,142