Comprehensive Income (Loss) per Common Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Earnings Per Share [Abstract]
Comprehensive Income (Loss)	$ 61,920	$ 28,386	$ (451,801)	$ 90,972
Less: Preferred dividends	(2,320)	(3,410)	(7,467)	(11,943)
Comprehensive Income (Loss) available (related) to common stockholders	$ 59,600	$ 24,976	$ (459,268)	$ 79,029
Net Comprehensive Income (Loss) per share available (related) to common stockholders:
Basic (in dollars per share)	$ 0.92	$ 0.42	$ (7.35)	$ 1.38
Diluted (in dollars per share)	$ 0.91	$ 0.42	$ (7.35)	$ 1.37
Weighted average common shares outstanding:
Basic (in shares)	64,724	59,077	62,458	57,473
Add: Effect of dilutive non-vested awards, assumed vested (in shares)	548	0	0	0
Add: Effect of dilutive non-vested awards, assumed vested (in shares)		282		282
Weighted average common shares outstanding - diluted (in shares)	65,272	59,077	62,458	57,473
Weighted average common shares outstanding – diluted (in shares)		59,359		57,755
Antidilutive shares excluded from computation of earnings per share (in shares)		282	548	282