Earnings Per Share (Details 1) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015		Dec. 31, 2014	Dec. 31, 2013
Earnings Per Share [Abstract]
Restricted common shares									0.76%		0.73%	0.80%
Earnings per common share — Basic:
Income from continuing operations	$ 50,641	$ (13,989)	$ 41,808	$ 43,269	$ 72,764	$ 19,151	$ 3,136	$ 5,777	$ 121,729		$ 100,828	$ 29,781
Less: Distributed and undistributed earnings allocated to restricted common shares(a)									(924)	[1]	(732)	(238)
Income from continuing operations available to common shareholders — Basic									$ 120,805		$ 100,096	$ 29,543
Weighted-average common shares outstanding — Basic									80,489,391		80,389,349	73,652,996
Net income per share (in dollars per share)	$ 0.63	$ (0.17)	$ 0.51	$ 0.53	$ 0.90	$ 0.24	$ 0.04	$ 0.07	$ 1.50		$ 1.25	$ 0.40
Earnings per common share — Diluted:
Income from continuing operations	$ 50,641	$ (13,989)	$ 41,808	$ 43,269	$ 72,764	$ 19,151	$ 3,136	$ 5,777	$ 121,729		$ 100,828	$ 29,781
Income from continuing operations available to common shareholders — Diluted									$ 120,805		$ 100,096	$ 29,543
Weighted-average common shares outstanding — Basic									80,489,391		80,389,349	73,652,996
Effect of diluted shares									0	[2]	0
Weighted-average common shares outstanding — Diluted									80,489,391		80,389,349	73,652,996
Net income per share (in dollars per share)	$ 0.63	$ (0.17)	$ 0.51	$ 0.53	$ 0.90	$ 0.24	$ 0.04	$ 0.07	$ 1.50		$ 1.25	$ 0.40

[1] For the years ended December 31, 2015, 2014 and 2013, distributed and undistributed earnings to restricted shares is 0.76%, 0.73% and 0.80%, respectively, of net income. The amount of restricted share forfeitures for all periods present is immaterial to the allocation of distributed and undistributed earnings.

[2] For the years ended December 31, 2015, 2014 and 2013, we have no dilutive shares.