CONSOLIDATED STATEMENT OF CHANGES IN EQUITY - USD ($) $ in Thousands	Total	Common Shares	Preferred Shares	Additional Paid In Capital	Accumulated Deficit	Accumulated Other Comprehensive (Loss) Income	Non-Controlling Interest in Equity of Consolidated Subsidiaries
Beginning balance at Dec. 31, 2018	$ 1,053,782	$ 840	$ 0	$ 1,029,376	$ (32,817)		$ 56,383
Comprehensive income (loss):
Net income (loss)	(9,796)				(6,380)		(3,416)
Other comprehensive loss	(43,012)					$ (43,012)	0
Comprehensive (loss) income	(52,808)				(6,380)	(43,012)	(3,416)
Issuance of common shares	239	5		234
Conversion of participating securities	(4)			(4)
Dividends declared - common shares	(28,383)			(28,383)
Equity-based compensation	228						228
Ending balance at Mar. 31, 2019	973,054	845	0	1,001,223	(39,197)	(43,012)	53,195
Beginning balance at Dec. 31, 2018	1,053,782	840	0	1,029,376	(32,817)		56,383
Comprehensive income (loss):
Net income (loss)	5,997
Comprehensive (loss) income	40,055
Dividends declared - preferred shares	0
Ending balance at Jun. 30, 2019	1,038,233	848	0	972,836	(18,865)	34,058	49,356
Beginning balance at Mar. 31, 2019	973,054	845	0	1,001,223	(39,197)	(43,012)	53,195
Comprehensive income (loss):
Net income (loss)	15,793				20,332		(4,539)
Other comprehensive loss	77,070					77,070
Comprehensive (loss) income	92,863				20,332	77,070	(4,539)
Issuance of common shares	3	3
Conversion of participating securities	(3)			(3)
Dividends declared - common shares	(28,384)			(28,384)
Dividends declared - preferred shares	0
Equity-based compensation	700						700
Ending balance at Jun. 30, 2019	1,038,233	848	0	972,836	(18,865)	34,058	49,356
Beginning balance at Dec. 31, 2019	1,338,857	849	81	1,110,122	190,453	372	36,980
Comprehensive income (loss):
Net income (loss)	(3,060)				1,676		(4,736)
Other comprehensive loss	8,758					8,758
Comprehensive (loss) income	5,698				1,676	8,758	(4,736)
Issuance of common shares	156	2		154
Conversion of participating securities	(2)			(2)
Dividends declared - common shares	(28,391)				(28,391)
Issuance costs of preferred shares	(246)			(246)
Dividends declared - preferred shares	(4,539)				(4,539)
Equity-based compensation	291						291
Ending balance at Mar. 31, 2020	1,311,824	851	81	1,110,028	159,199	9,130	32,535
Beginning balance at Dec. 31, 2019	1,338,857	849	81	1,110,122	190,453	372	36,980
Comprehensive income (loss):
Net income (loss)	(18,788)
Comprehensive (loss) income	(22,142)
Dividends declared - preferred shares	(8,618)
Ending balance at Jun. 30, 2020	1,251,491	856	81	1,109,631	115,113	(2,982)	28,792
Beginning balance at Mar. 31, 2020	1,311,824	851	81	1,110,028	159,199	9,130	32,535
Comprehensive income (loss):
Net income (loss)	(15,728)				(11,616)		(4,112)
Other comprehensive loss	(12,112)					(12,112)
Comprehensive (loss) income	(27,840)				(11,616)	(12,112)	(4,112)
Settlement of equity-based compensation	(42)						(42)
Issuance of common shares	155	5		150
Conversion of participating securities	(5)			(5)
Dividends declared - common shares	(28,391)				(28,391)
Issuance costs of preferred shares	(542)			(542)
Dividends declared - preferred shares	(4,079)				(4,079)
Equity-based compensation	411						411
Ending balance at Jun. 30, 2020	$ 1,251,491	$ 856	$ 81	$ 1,109,631	$ 115,113	$ (2,982)	$ 28,792