Equity and Earnings per Common Share, Earnings per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2019	Jun. 30, 2018
Numerator [Abstract]
Net income (loss) allocable to common stockholders	$ (27,158)	$ (21,138)	$ 13,845	$ 35,239	$ (48,296)	$ 49,084
Net (income) loss allocated to noncontrolling interests in Operating Partnership	438		(173)		787	(629)
Dividends on preferred stock	2,593		1,317		4,434	2,530
Net income (loss) attributable to common stockholders	$ (29,313)		$ 12,355		$ (51,943)	$ 45,925
Denominator [Abstract]
Weighted average common shares outstanding (in shares)	16,776,472		13,616,461		16,708,471	13,164,863
Weighted average diluted shares outstanding (in shares)	16,789,261		13,624,676		16,721,260	13,173,070
Basic and Diluted EPS [Abstract]
Basic (in dollars per share)	$ (1.75)		$ 0.91		$ (3.11)	$ 3.49
Diluted (in dollars per share)	$ (1.75)		$ 0.91		$ (3.11)	$ 3.49
Anti-dilutive securities (in shares)	0		0		0	0