Equity and Earnings per Common Share, Earnings per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Sep. 30, 2019	Sep. 30, 2018
Numerator [Abstract]
Net income (loss)	$ (2,951)	$ (27,158)	$ (21,138)	$ 27,499	$ 13,845	$ 35,239	$ (51,247)	$ 76,583
Net (income) loss allocated to noncontrolling interests in Operating Partnership	43			(364)			830	(993)
Dividends on preferred stock	2,459			1,372			6,893	3,902
Net income (loss) applicable to common stockholders	$ (5,367)			$ 25,763			$ (57,310)	$ 71,688
Denominator [Abstract]
Weighted average common shares outstanding (in shares)	16,883,816			15,864,774			16,767,562	14,065,000
Weighted average diluted shares outstanding (in shares)	16,896,605			15,873,030			16,780,351	14,073,256
Basic and Diluted EPS [Abstract]
Basic (in dollars per share)	$ (0.32)			$ 1.62			$ (3.42)	$ 5.10
Diluted (in dollars per share)	$ (0.32)			$ 1.62			$ (3.42)	$ 5.09
Anti-dilutive securities (in shares)	0			0			0	0