Consolidated Statements of Changes in Equity - USD ($) $ in Thousands	Total	7.75% Series A cumulative redeemable preferred shares	8.375% Series B cumulative redeemable preferred shares	Series C Cumulative Redeemable Preferred Stock	4.0% convertible senior notes	7.0% convertible senior notes	Common Shares	Common Shares 7.0% convertible senior notes	Additional Paid In Capital	Additional Paid In Capital 4.0% convertible senior notes	Additional Paid In Capital 7.0% convertible senior notes	Accumulated Other Comprehensive Income (Loss)	Retained Earnings (Deficit)	Total Shareholders' Equity	Total Shareholders' Equity Preferred Series D	Total Shareholders' Equity 4.0% convertible senior notes	Total Shareholders' Equity 7.0% convertible senior notes	NonControlling Interests
Beginning Balance at Dec. 31, 2012	$ 837,846	$ 31	$ 23	$ 17			$ 1,760		$ 1,837,389			$ (95,173)	$ (910,086)	$ 833,961				$ 3,885
Beginning Balance (in shares) at Dec. 31, 2012		3,124,288	2,288,465	1,640,100			58,913,142
Net income (loss)	(285,364)												(285,392)	(285,392)				28
Preferred dividends	(22,616)												(22,616)	(22,616)
Common dividends declared	(39,212)												(39,212)	(39,212)
Other comprehensive income (loss) net	31,363											31,363		31,363
Share-based compensation	(351)								(351)					(351)
Acquisition of noncontrolling interests	31,303																	31,303
Distribution to noncontrolling interests	(1,089)																	(1,089)
Stock appreciation rights awarded	1,332								1,332					1,332
Preferred shares issued, net	21,829	$ 10							21,819					21,829
Preferred shares issued, net (shares)		945,000
Common shares issued, net	90,029						$ 383		89,646					90,029
Common shares issued, net (in shares)							12,534,295
Convertible senior notes embedded conversion option					$ 8,817					$ 8,817						$ 8,817
4.0% convertible senior notes hedge or capped call	(8,838)								(8,838)					(8,838)
Repurchase of equity conversion right of 7.0% convertible senior notes	(29,359)								(29,359)					(29,359)
Ending Balance at Dec. 31, 2013	635,690	$ 41	$ 23	$ 17			$ 2,143		1,920,455			(63,810)	(1,257,306)	601,563				34,127
Ending Balance (in shares) at Dec. 31, 2013		4,069,288	2,288,465	1,640,100			71,447,437
Net income (loss)	(289,975)												(289,511)	(289,511)				(464)
Preferred dividends	(28,993)												(28,993)	(28,993)
Common dividends declared	(58,101)												(58,101)	(58,101)
Other comprehensive income (loss) net	43,022											43,022		43,022
Share-based compensation	940								940					940
Issuance of noncontrolling interests	192,153																	192,153
Distribution to noncontrolling interests	(11,519)																	(11,519)
Preferred shares issued, net	16,361	$ 7							16,354					16,361
Preferred shares issued, net (shares)		706,281
Common shares issued for equity compensation	64						$ 11		53					64
Common shares issued for equity compensation (in shares)							410,749
Common shares issued, net	88,499						$ 319		88,180					88,499
Common shares issued, net (in shares)							10,648,420
Convertible senior notes embedded conversion option					$ 1,182					$ 1,182						$ 1,182
4.0% convertible senior notes hedge or capped call	(1,481)								(1,481)					(1,481)
Ending Balance at Dec. 31, 2014	587,842	$ 48	$ 23	$ 17			$ 2,473		2,025,683			(20,788)	(1,633,911)	373,545				214,297
Ending Balance (in shares) at Dec. 31, 2014		4,775,569	2,288,465	1,640,100			82,506,606
Net income (loss)	63,493												39,988	39,988				23,505
Preferred dividends	(26,275)												(26,275)	(26,275)
Preferred Series D discount amortization	(6,555)												(6,555)		$ 0
Common dividends declared	(53,998)												(53,998)	(53,998)
Other comprehensive income (loss) net	16,089											16,089		16,089
Share-based compensation	4,466								4,466					4,466
Issuance of noncontrolling interests	123,911																	123,911
Distribution to noncontrolling interests	(23,163)								(1,000)					(1,000)				(22,163)
Deconsolidation of real estate owned property	663																	663
Preferred shares issued, net	13,055	$ 5							13,050					13,055
Preferred shares issued, net (shares)		530,515	52,504	325
Common shares issued for equity compensation	(982)						$ 14		(996)					(982)
Common shares issued for equity compensation (in shares)							385,322
Common shares issued, net	42,425						$ 240		42,185					42,425
Common shares issued, net (in shares)							8,008,817
Convertible senior notes embedded conversion option						$ 3,770		$ 21			$ 3,749						$ 3,770
Convertible senior notes embedded conversion option (in shares)								686,022
Ending Balance at Dec. 31, 2015	$ 744,741	$ 53	$ 23	$ 17			$ 2,748		$ 2,087,137			$ (4,699)	$ (1,680,751)	$ 404,528				$ 340,213
Ending Balance (in shares) at Dec. 31, 2015		5,306,084	2,340,969	1,640,425			91,586,767