CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Class A Common Shares [Member]
Common shares, par value	$ 0.01	$ 0.01
Common shares, authorized	100,000,000	100,000,000
Common shares, outstanding	35,208,666	32,415,734
Common shares, issued	35,208,666	32,415,734
Class B Common Shares [Member]
Common shares, par value	$ 0.01	$ 0.01
Common shares, authorized	5,000,000	5,000,000
Common shares, outstanding	1,328,866	1,328,866
Common shares, issued	1,328,866	1,328,866
Class C Common Shares [Member]
Common shares, par value	$ 0.01	$ 0.01
Common shares, authorized	50,000,000	50,000,000
Common shares, outstanding	372,010	3,151,131
Common shares, issued	372,010	3,151,131
Series A Preferred Shares [Member]
Common shares, outstanding	2,800,000	2,800,000
Preferred shares, par value	$ 0.01	$ 0.01
Preferred shares, authorized	10,000,000	10,000,000
Preferred shares, outstanding	2,800,000	2,800,000
Preferred shares, issued	2,800,000	2,800,000
Preferred shares, liquidation preference	$ 70,000	$ 70,000