FAIR VALUE (Fair Value Measurements, Non-recurring) (Details) (USD $) In Thousands, unless otherwise specified					3 Months Ended		6 Months Ended				3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended
	Jun. 30, 2014		Dec. 31, 2013		Jun. 30, 2014 Nonrecurring [Member]	Jun. 30, 2013 Nonrecurring [Member]	Jun. 30, 2014 Nonrecurring [Member]	Jun. 30, 2013 Nonrecurring [Member]	Jun. 30, 2014 Nonrecurring [Member] Impaired loans held for investment [Member]	Dec. 31, 2013 Nonrecurring [Member] Impaired loans held for investment [Member]	Jun. 30, 2014 Nonrecurring [Member] Impaired loans held for investment [Member] Provision for credit losses [Member]	Jun. 30, 2013 Nonrecurring [Member] Impaired loans held for investment [Member] Provision for credit losses [Member]	Jun. 30, 2014 Nonrecurring [Member] Impaired loans held for investment [Member] Provision for credit losses [Member]	Jun. 30, 2013 Nonrecurring [Member] Impaired loans held for investment [Member] Provision for credit losses [Member]	Jun. 30, 2014 Nonrecurring [Member] Foreclosed assets [Member] Other administrative expense [Member]	Jun. 30, 2013 Nonrecurring [Member] Foreclosed assets [Member] Other administrative expense [Member]	Jun. 30, 2014 Nonrecurring [Member] Foreclosed assets [Member] Other administrative expense [Member]	Jun. 30, 2013 Nonrecurring [Member] Foreclosed assets [Member] Other administrative expense [Member]	Jun. 30, 2014 Nonrecurring [Member] Repossessed vehicle inventory [Member] Provision for credit losses [Member]	Jun. 30, 2013 Nonrecurring [Member] Repossessed vehicle inventory [Member] Provision for credit losses [Member]	Jun. 30, 2014 Nonrecurring [Member] Repossessed vehicle inventory [Member] Provision for credit losses [Member]	Jun. 30, 2013 Nonrecurring [Member] Repossessed vehicle inventory [Member] Provision for credit losses [Member]	Jun. 30, 2014 Nonrecurring [Member] Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]	Dec. 31, 2013 Nonrecurring [Member] Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]	Jun. 30, 2014 Nonrecurring [Member] Significant Other Observable Inputs (Level 2) [Member]	Dec. 31, 2013 Nonrecurring [Member] Significant Other Observable Inputs (Level 2) [Member]	Jun. 30, 2014 Nonrecurring [Member] Significant Unobservable Inputs (Level 3) [Member]	Dec. 31, 2013 Nonrecurring [Member] Significant Unobservable Inputs (Level 3) [Member]	Jun. 30, 2014 Nonrecurring [Member] Fair Value [Member]	Dec. 31, 2013 Nonrecurring [Member] Fair Value [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans held for investment																							$ 0	$ 0	$ 94,685	$ 149,796	$ 64,229	$ 137,356	$ 158,914	$ 287,152
Foreclosed assets																							0	0	29,840	57,431	0	0	29,840	57,431
Repossessed vehicle inventory																							0		140,792		0		140,792
Total carrying value of the loans	3,162,975	[1]	1,233,152	[1]					111,900	209,100
Fair value adjustment					$ 569,980	$ (30,616)	$ 674,147	$ (16,728)			$ (9,656)	$ (29,756)	$ (10,200)	$ (14,324)	$ (129)	$ (860)	$ (352)	$ (2,404)	$ 579,765	$ 0	$ 684,699	$ 0

[1] Recorded investment includes deferred loan fees, net of deferred origination costs and unamortized purchase premiums, net of discounts as well as purchase accounting adjustments.