CONSOLIDATED BALANCE SHEET (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
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	32,415,734	25,843,251
Common shares, issued	32,415,734	25,843,251
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	1,589,020
Common shares, issued	1,328,866	1,589,020
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	3,151,131	5,754,685
Common shares, issued	3,151,131	5,754,685
Series A Preferred Shares [Member]
Common shares, outstanding	2,800,000
Preferred shares, par value	$ 0.01
Preferred shares, authorized	10,000,000
Preferred shares, outstanding	2,800,000
Preferred shares, issued	2,800,000
Preferred shares, liquidation preference	$ 70,000