Equity - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2015
Class of Stock [Line Items]
Warrants expiration date	February 24, 2022
Number of equity units		5,113,475
Issuance of TEUs net of offering costs	$ 90,725
Common stock, Class A, par value $0.01 per share; 150,000,000 shares authorized; 28,363,879 and 28,073,438 shares issued, 27,657,435 and 27,487,257 shares outstanding at December 31, 2015 and 2014, respectively | Maximum
Class of Stock [Line Items]
Number of equity units	5.2247
Common stock, Class A, par value $0.01 per share; 150,000,000 shares authorized; 28,363,879 and 28,073,438 shares issued, 27,657,435 and 27,487,257 shares outstanding at December 31, 2015 and 2014, respectively | Minimum
Class of Stock [Line Items]
Number of equity units	4.4465
Common stock, Class B, par value $0.01 per share; 30,000,000 shares authorized; 3,813,884 shares issued and outstanding at December 31, 2015 and 2014, respectively
Class of Stock [Line Items]
Common stock, shares issued to purchase warrants (in shares)	1,907,551
Warrants to purchase common stock price per share (in USD per share)	$ 17.08
Warrants [Member]
Class of Stock [Line Items]
Adoption of fresh start accounting	$ 1,000
Additional Paid-In Capital
Class of Stock [Line Items]
Issuance of TEUs net of offering costs	$ 90,725