Consolidated Balance Sheets (Parenthetical) - $ / shares shares in Thousands	Dec. 31, 2019	Mar. 27, 2019	Dec. 31, 2018	Dec. 31, 2017
Stockholders' equity:
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	85,000		85,000
Common stock, shares issued (in shares)	46,410		46,410
Common stock, shares outstanding (in shares)	40,738		40,738	40,738
Treasury stock, at cost (in shares)	5,672		5,672	5,672