Condensed Consolidated Statements of Shareholder's Equity (Unaudited) - USD ($) $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment		Cumulative Effect, Period of Adoption, Adjusted Balance	Preferred Stock	Preferred Stock Cumulative Effect, Period of Adoption, Adjusted Balance	Common Stock	Common Stock Cumulative Effect, Period of Adoption, Adjusted Balance	Surplus	Surplus Cumulative Effect, Period of Adoption, Adjusted Balance	Accumulated Deficit	Accumulated Deficit Cumulative Effect, Period of Adoption, Adjustment		Accumulated Deficit Cumulative Effect, Period of Adoption, Adjusted Balance	Accumulated Other Comprehensive Income (Loss)	Accumulated Other Comprehensive Income (Loss) Cumulative Effect, Period of Adoption, Adjustment	[1],[2]	Accumulated Other Comprehensive Income (Loss) Cumulative Effect, Period of Adoption, Adjusted Balance	Non-Controlling Interests	Non-Controlling Interests Cumulative Effect, Period of Adoption, Adjusted Balance
Balance, beginning of period at Dec. 31, 2018	$ 13,512,529	$ 3,460	[1]	$ 13,515,989	$ 229,475	$ 229,475	$ 2,230	$ 2,230	$ 14,545,849	$ 14,545,849	$ (1,107,198)	$ 38,896	[1]	$ (1,068,302)	$ (186,848)	$ (35,436)		$ (222,284)	$ 29,021	$ 29,021
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	484,112										482,443								1,669
Other comprehensive income (loss), net of tax	288,293														288,293
Issuance of common stock	802								802
Preferred stock dividends	(14,808)								(13,771)										(1,037)
Common stock dividends	(170,000)								(170,000)
Capital contribution	144																		144
Vesting of restricted stock	(2,914)								(2,914)
Balance, end of period at Sep. 30, 2019	14,101,618				229,475		2,230		14,359,966		(585,859)				66,009				29,797
Balance, beginning of period at Jun. 30, 2019	13,870,723				229,475		2,230		14,364,527		(768,290)				13,508				29,273
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	182,945										182,431								514
Other comprehensive income (loss), net of tax	52,501														52,501
Preferred stock dividends	(4,561)								(4,561)
Capital contribution	10																		10
Balance, end of period at Sep. 30, 2019	14,101,618				229,475		2,230		14,359,966		(585,859)				66,009				29,797
Balance, beginning of period at Dec. 31, 2019	13,386,589	$ (150,213)		$ 13,236,376	229,475	$ 229,475	2,230	$ 2,230	14,043,727	$ 14,043,727	(917,227)	$ (150,213)		$ (1,067,440)	(1,072)			$ (1,072)	29,456	$ 29,456
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(2,195,481)										(2,196,855)								1,374
Other comprehensive income (loss), net of tax	366,446														366,446
Preferred stock dividends	(12,443)								(11,406)										(1,037)
Capital contribution	66																		66
Balance, end of period at Sep. 30, 2020	11,394,964				229,475		2,230		14,032,321		(3,264,295)				365,374				29,859
Balance, beginning of period at Jun. 30, 2020	11,270,789				229,475		2,230		14,035,607		(3,430,135)				404,165				29,447
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	166,241										165,840								401
Other comprehensive income (loss), net of tax	(38,791)														(38,791)
Preferred stock dividends	(3,286)								(3,286)
Capital contribution	11																		11
Balance, end of period at Sep. 30, 2020	$ 11,394,964				$ 229,475		$ 2,230		$ 14,032,321		$ (3,264,295)				$ 365,374				$ 29,859

[1] Related to the Company's adoption of ASU 2016-02, ASU 2017-12 and ASU 2018-02 on January 1, 2019.

[2] Related to the Company's adoption of ASU 2017-12 and ASU 2018-02 on January 1, 2019.