Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Statement Of Financial Position [Abstract]
Intangible assets, accumulated amortization	$ 0	$ 11,551
Indebtedness, unamortized discount and deferred financing costs	$ 6,371	$ 8,920
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	50,000,000	50,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	300,000,000	300,000,000
Common stock, shares issued	68,996,070	47,070,678
Common stock, shares outstanding	68,996,070	47,070,678
Unvested restricted common share awards	281,000	117,000