Consolidated Balance Sheets (Unaudited) (Parenthetical) - $ / shares	Jun. 30, 2019	Dec. 31, 2018
Statement of Financial Position [Abstract]
Preferred stock, shares authorized (in shares)	5,000,000	5,000,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	192,130,071	192,130,071
Common stock, shares issued (in shares)	46,885,198	46,651,616
Common stock, shares outstanding (in shares)	46,417,442	46,390,513
Treasury stock, shares (in shares)	467,756	261,103