Equity and Earnings per Share, Earnings per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Numerator [Abstract]
Net income attributable to common stockholders and participating securities	$ 22,587	$ (7,162)
Net income allocable to common stockholders	$ 22,178	$ (7,063)
Denominator [Abstract]
Weighted average common shares outstanding (in shares)	7,634,038	7,509,543
Weighted average diluted shares outstanding (in shares)	7,640,348	7,519,038
Basic and Dilutive [Abstract]
Basic earnings per share (in dollars per share)	$ 2.91	$ (0.94)
Diluted earnings per share (in dollars per share)	$ 2.90	$ (0.94)
Anti-dilutive securities (in shares)	0	0