FAIR VALUE (Reconciliation of Assets and Liabilities Using Level 3 Inputs) (Details) (Level 3 [Member], Recurring [Member], USD $) In Thousands, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2014		Jun. 30, 2013
Fair Value, Assets, Unobservable Input Reconciliation [Roll Forward]
Balance, beginning of period	$ 2,877,490		$ 165,003		$ 194,891		$ 150,608
Gains in other comprehensive income	822		9,968		1,870		11,824
Gains/(losses) in earnings	210,768		2,172		351,408		8,465
Additions/Issuances	104,455		10,874		1,976,712		24,046
Settlements	(548,732)	[1]	(5,476)	[2]	(1,051,538)	[1]	(12,402)	[2]
Transfers into level 3					1,171,460
Balance, end of period	2,644,803		182,541		2,644,803		182,541
Changes in unrealized gains (losses) included in earnings related to balances still held at end of period	(6,973)		23,320		(11,567)		33,333
Investments Available-for-sale [Member]
Fair Value, Assets, Unobservable Input Reconciliation [Roll Forward]
Balance, beginning of period	1,225,012		44,818		52,940		43,374
Gains in other comprehensive income	822		9,968		1,870		11,824
Gains/(losses) in earnings	0		0		0		0
Additions/Issuances	102,326		0		102,326		0
Settlements	(84,288)	[1]	(417)	[2]	(84,724)	[1]	(829)	[2]
Transfers into level 3					1,171,460
Balance, end of period	1,243,872		54,369		1,243,872		54,369
Changes in unrealized gains (losses) included in earnings related to balances still held at end of period	0		0		0		0
Retail Installment Contracts Held for Investment [Member]
Fair Value, Assets, Unobservable Input Reconciliation [Roll Forward]
Balance, beginning of period	1,516,353				0
Gains in other comprehensive income	0				0
Gains/(losses) in earnings	215,377				359,430
Additions/Issuances	0				1,870,383
Settlements	(458,658)	[1]			(956,741)	[1]
Transfers into level 3					0
Balance, end of period	1,273,072				1,273,072
Changes in unrealized gains (losses) included in earnings related to balances still held at end of period	0				0
MSRs [Member]
Fair Value, Assets, Unobservable Input Reconciliation [Roll Forward]
Balance, beginning of period	134,775		109,163		141,787		92,512
Gains in other comprehensive income	0		0		0		0
Gains/(losses) in earnings	(6,893)		23,270		(11,352)		33,366
Additions/Issuances	2,129		10,874		4,003		24,046
Settlements	(5,893)	[1]	(5,166)	[2]	(10,320)	[1]	(11,783)	[2]
Transfers into level 3					0
Balance, end of period	124,118		138,141		124,118		138,141
Changes in unrealized gains (losses) included in earnings related to balances still held at end of period	(6,893)		23,270		(11,352)		33,366
Derivatives [Member]
Fair Value, Assets, Unobservable Input Reconciliation [Roll Forward]
Balance, beginning of period	1,350		11,022		164		14,722
Gains in other comprehensive income	0		0		0		0
Gains/(losses) in earnings	2,284		(21,098)		3,330		(24,901)
Additions/Issuances	0		0		0		0
Settlements	107	[1]	107	[2]	247	[1]	210	[2]
Transfers into level 3					0
Balance, end of period	3,741		(9,969)		3,741		(9,969)
Changes in unrealized gains (losses) included in earnings related to balances still held at end of period	$ (80)		$ 50		$ (215)		$ (33)

[1] Settlements include charge-offs, prepayments, paydowns and maturities.

[2] Settlements include prepayments, paydowns and maturities.