CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($)	Dec. 31, 2016	Dec. 31, 2015
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common Stock, Shares Authorized (in shares)	100,000,000	100,000,000
Common Stock, Shares Issued (in shares)	53,148,441	53,000,689
Common Stock, Shares Outstanding (in shares)	53,148,441	53,000,689
Convertible Notes Payable
Stated interest rate	3.75%	3.75%
Face amount of the Notes	$ 143,750,000	$ 143,750,000
Series A Convertible Preferred Stock
Preferred Stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred Stock, Shares Authorized (in shares)	100	100
Preferred Stock, Shares Issued (in shares)	0	0
Preferred Stock, Shares Outstanding (in shares)	0	0
Series C Convertible Preferred Stock
Preferred Stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred Stock, Shares Authorized (in shares)	1,550	1,550
Preferred Stock, Shares Issued (in shares)	0	0
Preferred Stock, Shares Outstanding (in shares)	0	0