CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares	Mar. 31, 2017	Dec. 31, 2016
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	2,000,000	2,000,000
Preferred stock, shares issued (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	117,500,000	117,500,000
Common stock, shares issued (in shares)	34,445,394	34,336,147
Common stock, shares outstanding (in shares)	34,445,394	34,336,147
Convertible 2.5% notes, net
Convertible notes, interest rate (as a percent)	2.50%	2.50%