CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED) (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Statement of Financial Position [Abstract]
Trade accounts receivable, allowance	$ 6,815	$ 4,303
Preferred stock, authorized shares (in shares)	15,000,000	15,000,000
Preferred stock, outstanding shares (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, authorized shares (in shares)	240,000,000	240,000,000
Common stock, issued shares (in shares)	89,189,000	88,735,000
Treasury stock, shares (in shares)	4,915,000	2,865,000