Santander Consumer USA (SC) 10-Q 7 Aug 14 2014 Q2 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	6 Months Ended
	Jun. 30, 2014	Aug. 04, 2014
Document And Entity Information [Abstract]	'	'
Document Type	'10-Q	'
Amendment Flag	'false	'
Document Period End Date	30-Jun-14	'
Document Fiscal Year Focus	'2014	'
Document Fiscal Period Focus	'Q2	'
Entity Registrant Name	'Santander Consumer USA Holdings Inc.	'
Entity Central Index Key	'0001580608	'
Current Fiscal Year End Date	'--12-31	'
Entity Filer Category	'Non-accelerated Filer	'
Entity Common Stock, Shares Outstanding	'	348,939,599

CONDENSED_CONSOLIDATED_BALANCE

CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) (USD $)	Jun. 30, 2014		Dec. 31, 2013
In Thousands, unless otherwise specified
Assets	'		'
Cash and cash equivalents	$45,913	[1]	$10,531
Receivables held for sale	123,791	[2]	82,503
Retail installment contracts held for investment, net	21,444,601	[3]	20,219,609
Unsecured consumer loans, net	1,233,637	[4]	954,189
Restricted cash	2,007,946	[1]	1,563,613
Receivables from dealers, held for investment, net	85,194	[5]	94,745
Accrued interest receivable	344,658		319,157
Leased vehicles, net	3,567,546		2,023,433
Furniture and equipment, net of accumulated depreciation of $58,587 and $58,117, respectively	30,405		25,712
Federal, state and other income taxes receivable	7,487		372,338
Deferred tax asset	220,338		197,041
Goodwill	74,056		74,056
Intangible assets	53,637		54,664
Other assets	493,187		410,305
Total assets	29,732,396		26,401,896
Liabilities:	'		'
Notes payable — credit facilities, $3,300,000 and $3,650,000 to affiliates, respectively	7,762,950	[6]	8,099,773
Notes payable — secured structured financings	18,391,660	[7]	15,195,887
Accrued interest payable — $6,485 and $11,563 to affiliates, respectively	24,452		26,512
Accounts payable and accrued expenses — $43,930 and $39,772 to affiliates, respectively	281,250		283,106
Federal, state and other income taxes payable	81,145		7,623
Other liabilities	88,681		102,163
Total liabilities	26,630,138		23,715,064
Commitments and contingencies (Notes 5 and 10)	'		'
Equity:	'		'
Common stock, $0.01 par value - 1,100,000,000 shares authorized; 348,931,490 and 346,763,261 shares issued and 348,928,336 and 346,760,107 shares outstanding, respectively	3,489		3,468
Additional paid-in capital	1,550,513		1,409,463
Accumulated other comprehensive loss	-4,129		-2,853
Retained earnings	1,552,385		1,276,754
Total stockholders’ equity	3,102,258		2,686,832
Total liabilities and equity	$29,732,396		$26,401,896
[1]	Cash and cash equivalents and restricted cash — The carrying amount of cash and cash equivalents, including restricted cash, approximated fair value at June 30, 2014 and December 31, 2013, due to the short maturity of these instruments and is considered a Level 1 measurement.
[2]	Receivables held for sale — Receivables held for sale are carried at the lower of cost or market, as determined on an aggregate basis. The estimated fair value is based on the prices obtained or expected to be obtained in the subsequent sales and is considered a Level 2 measurement.
[3]	Retail installment contracts held for investment — Retail installment contracts held for investment are carried at amortized cost, net of loan loss allowance. The estimated fair value is calculated based on estimated market rates for similar contracts with similar credit risks and is considered a Level 3 measurement.
[4]	Unsecured consumer loans, net — Unsecured consumer loans are carried at amortized cost, net of loan loss allowance. Carrying value approximates fair value for unsecured revolving loans because the loans are short term in duration, do not have a defined maturity date and/or are at a market-based interest rate. For unsecured amortizing loans, the estimated fair value is calculated based on estimated market rates for similar loans with similar credit risks and is considered a level 3 measurement.
[5]	Receivables from dealers, held for investment, net — Receivables from dealers held for investment are carried at amortized cost, net of loan loss allowance. The estimated fair value is calculated based on estimated market rates for similar receivables with similar credit risks and is considered a Level 3 measurement.
[6]	Notes payable — credit facilities — The carrying amount of notes payable related to revolving credit facilities is estimated to approximate fair value as of June 30, 2014 and December 31, 2013. Management believes that the terms of these credit agreements approximate market terms for similar credit agreements. The fair value of notes payable is considered a Level 3 measurement.
[7]	Notes payable — secured structured financings — The estimated fair value of notes payable related to secured structured financings is calculated based on market quotes for the Company’s publicly traded debt and estimated market rates currently available from recent transactions involving similar debt with similar credit risks, and is considered a Level 2 measurement.

CONDENSED_CONSOLIDATED_BALANCE1

CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) (Parenthetical) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, except Share data, unless otherwise specified
Statement of Financial Position [Abstract]	'	'
Accumulated depreciation	$58,587	$58,117
Notes payable — credit facilities to affiliates	3,300,000	3,650,000
Accrued interest payable to affiliates	6,485	11,563
Accounts payable and accrued expenses to affiliates	$43,930	$39,772
Common stock , par value (in usd per share)	$0.01	$0.01
Common stock , shares authorized	1,100,000,000	1,100,000,000
Common stock , shares issued	348,931,490	346,763,261
Common stock , shares outstanding	348,928,336	346,760,167

CONDENSED_CONSOLIDATED_STATEME

CONDENSED CONSOLIDATED STATEMENTS OF INCOME AND COMPREHENSIVE INCOME (Unaudited) (USD $)	3 Months Ended		6 Months Ended
In Thousands, except Share data, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Income Statement [Abstract]	'	'	'	'
Interest on finance receivables and loans	$1,163,448	$900,375	$2,303,777	$1,712,282
Leased vehicle income	218,938	10,030	366,061	10,030
Other finance and interest income	874	2,156	1,124	4,841
Total finance and other interest income	1,383,260	912,561	2,670,962	1,727,153
Interest expense — Including $36,836, $15,390, $71,079, and $26,884 to affiliates, respectively	128,314	87,476	252,760	170,473
Leased vehicle expense	179,135	7,028	299,204	7,028
Net finance and other interest income	1,075,811	818,057	2,118,998	1,549,652
Provision for loan losses	589,136	408,411	1,287,730	625,604
Net finance and other interest income after provision for loan losses	486,675	409,646	831,268	924,048
Profit sharing	24,056	7,564	56,217	7,564
Net finance and other interest income after provision for loan losses and profit sharing	462,619	402,082	775,051	916,484
Gain on sale of finance receivables and leases	21,602	1,272	57,416	1,272
Servicing fee income	22,099	6,355	32,504	13,626
Fees, commissions, and other	95,030	46,782	184,334	115,640
Total other income	138,731	54,409	274,254	130,538
Salary and benefits expense	93,689	75,332	295,604	137,879
Repossession expense	45,648	30,982	94,079	67,140
Other operating costs	71,889	64,984	139,991	115,153
Total operating expenses	211,226	171,298	529,674	320,172
Income before income taxes	390,124	285,193	519,631	726,850
Income tax expense	143,643	104,129	191,684	256,927
Net income	246,481	181,064	327,947	469,923
Noncontrolling interests	0	854	0	2,397
Net income attributable to Santander Consumer USA Holdings Inc. shareholders	246,481	181,918	327,947	472,320
Other comprehensive income (loss):	'	'	'	'
Change in unrealized gains (losses) on cash flow hedges, net of tax of $1,950, ($1,238), $720 and ($2,944)	-3,364	2,001	-1,276	4,835
Change in unrealized gains on investments available for sale, net of tax of zero, $682, zero and $1,625	0	-1,167	0	-2,623
Other comprehensive income (loss), net	-3,364	834	-1,276	2,212
Comprehensive income	243,117	181,898	326,671	472,135
Comprehensive loss attributable to noncontrolling interests	0	586	0	1,577
Comprehensive income attributable to Santander Consumer USA Holdings Inc. shareholders	$243,117	$182,484	$326,671	$473,712
Net income per common share (basic) (in usd per share)	$0.71	$0.53	$0.94	$1.36
Net income per common share (diluted) (in usd per share)	$0.69	$0.53	$0.92	$1.36
Dividends declared per common share (in usd per share)	$0.15	$0.84	$0.15	$0.84
Weighted average common shares (basic)	348,826,897	346,171,491	348,465,666	346,168,144
Weighted average common shares (diluted)	356,381,921	346,171,491	356,008,288	346,168,144

CONDENSED_CONSOLIDATED_STATEME1

CONDENSED CONSOLIDATED STATEMENTS OF INCOME AND COMPREHENSIVE INCOME (Unaudited) (Parenthetical) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Income Statement [Abstract]	'	'	'	'
Interest expense to affiliates	$36,836	$15,390	$71,079	$26,884
Change in unrealized gains (losses) on cash flow hedges, tax	1,950	-1,238	720	-2,944
Change in unrealized gains on investments available for sale, tax	$0	$682	$0	$1,625

CONDENSED_CONSOLIDATED_STATEME2

CONDENSED CONSOLIDATED STATEMENTS OF EQUITY (Unaudited) (USD $)	Total	Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Loss	Retained Earnings	Noncontrolling Interests
In Thousands, except Share data, unless otherwise specified
Balance at Dec. 31, 2012	$2,239,466	$3,462	$1,335,572	($9,164)	$869,664	$39,932
Balance, shares at Dec. 31, 2012	'	346,165,000	'	'	'	'
Increase (Decrease) in Stockholders' Equity [Roll Forward]	'	'	'	'	'	'
Repayment of employee loans	519	'	519	'	'	'
Stock issued in connection with employee incentive compensation plans, shares	'	4,000	'	'	'	'
Stock issued in connection with employee incentive compensation plans	69	'	69	'	'	'
Capital contribution received from shareholder	48,275	'	48,275	'	'	'
Net income	472,320	'	'	'	472,320	'
Net income	469,923	'	'	'	'	-2,397
Other comprehensive income, net of taxes	2,212	'	'	2,212	'	'
Dividends	-290,401	'	'	'	-290,401	'
Balance at Jun. 30, 2013	2,470,063	3,462	1,384,435	-6,952	1,051,583	37,535
Balance, shares at Jun. 30, 2013	'	346,169,000	'	'	'	'
Balance at Dec. 31, 2013	2,686,832	3,468	1,409,463	-2,853	1,276,754	0
Balance, shares at Dec. 31, 2013	346,760,167	346,760,000	'	'	'	'
Increase (Decrease) in Stockholders' Equity [Roll Forward]	'	'	'	'	'	'
Stock issued in connection with employee incentive compensation plans, shares	'	2,168,000	'	'	'	'
Stock issued in connection with employee incentive compensation plans	18,260	21	18,239	'	'	'
Capital contribution received from shareholder	0	'	'	'	'	'
Net income	327,947	'	'	'	327,947	'
Net income	327,947	'	'	'	'	'
Stock based compensation expense	122,811	'	122,811	'	'	'
Other comprehensive income, net of taxes	-1,276	'	'	-1,276	'	'
Dividends	-52,316	'	'	'	-52,316	'
Balance at Jun. 30, 2014	$3,102,258	$3,489	$1,550,513	($4,129)	$1,552,385	$0
Balance, shares at Jun. 30, 2014	348,928,336	348,928,000	'	'	'	'

CONDENSED_CONSOLIDATED_STATEME3

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) (USD $)	6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014		Jun. 30, 2013
Cash flows from operating activities:	'		'
Net income	$327,947		$469,923
Adjustments to reconcile net income to net cash provided by operating activities:	'		'
Derivative mark to market	-8,112		-17,329
Provision for credit losses	1,287,730		625,604
Depreciation and amortization	335,902		36,269
Accretion of discount and capitalized origination costs, net	-403,654		-193,359
Originations and purchases of receivables held for sale	-2,385,913		-253,141
Proceeds from sales of and repayments on receivables held for sale	2,376,818		162,232
Gain on sale of finance receivables and leases	-57,416		-1,272
Stock-based compensation	122,811		324
Deferred tax benefit	-13,027		-107,707
Changes in assets and liabilities:	'		'
Accrued interest receivable	-59,825		-38,872
Accounts receivable	-19,740		-2,999
Federal income tax and other taxes	438,373		-72,306
Other assets	-21,774		-12,561
Accrued interest payable	-2,061		4,283
Other liabilities	-9,242		140,174
Net cash provided by operating activities	1,908,817		739,263
Cash flows from investing activities:	'		'
Retail installment contracts originated or purchased from dealers	-7,573,492		-7,254,246
Collections on retail installment contracts	4,561,823		4,241,026
Proceeds from sale of loans held for investment	776,746		0
Leased vehicles purchased	-2,491,092		-492,569
Manufacturer incentives received	499,500		105,393
Proceeds from sale of leased vehicles	366,471		0
Change in revolving unsecured consumer loans	-87,217		-283,406
Unsecured consumer term loans purchased	-300,832		-47,350
Collections on unsecured consumer term loans	46,633		1,022
Disbursements for receivables from lenders held for investment	-21,766		-190,554
Collections on receivables from lenders held for investment	23,573		4,040
Collections on investments available for sale	0		34,748
Purchases of furniture and equipment	-11,543		-11,036
Sales of furniture and equipment	885		827
Upfront fee paid in accordance with private label financing agreement	0		-150,000
Change in restricted cash	-444,333		-193,155
Other investing activities	-22,979		-3,398
Net cash used in investing activities	-4,677,623		-4,238,658
Cash flows from financing activities:	'		'
Proceeds from notes payable related to secured structured financings — net of debt issuance costs	7,717,856		4,318,966
Payments on notes payable related to secured structured financings	-4,526,678		-3,811,491
Proceeds from unsecured notes payable	2,407,533		1,286,119
Payments on unsecured notes payable	-2,807,016		-839,958
Proceeds from notes payable	12,684,871		10,937,485
Payments on notes payable	-12,622,210		-8,219,888
Proceeds from stock option exercises, gross	14,625		0
Repurchase of stock - employee tax withholding	-5,908		0
Dividends paid	-52,316		-290,401
Repayment of employee notes	0		519
Capital contribution from shareholder	0		48,275
Cash collateral posted on cash flow hedges	-6,569		0
Net increase (decrease) in cash and cash equivalents	2,804,188		3,429,626
Net increase (decrease) in cash and cash equivalents	35,382		-69,769
Cash — Beginning of period	10,531		70,887
Cash — End of period	$45,913	[1]	$1,118
[1]	Cash and cash equivalents and restricted cash — The carrying amount of cash and cash equivalents, including restricted cash, approximated fair value at June 30, 2014 and December 31, 2013, due to the short maturity of these instruments and is considered a Level 1 measurement.

Description_of_Business_Basis_

Description of Business, Basis of Presentation, and Changes in Significant Accounting Policies and Practices	6 Months Ended
	Jun. 30, 2014
Organization, Consolidation and Presentation of Financial Statements [Abstract]	'
Description of Business, Basis of Presentation, and Changes in Significant Accounting Policies and Practices	'
	Description of Business, Basis of Presentation, and Changes in Significant Accounting Policies and Practices
	Santander Consumer USA Holdings Inc., a Delaware Corporation (“SCUSA Delaware” or, together with its subsidiaries, “SCUSA” or “the Company”), is the holding company for Santander Consumer USA Inc., an Illinois corporation (“SCUSA Illinois”), and subsidiaries, a specialized consumer finance company focused on vehicle finance and unsecured consumer lending products.
	The Company is owned approximately 60.5% by Santander Holdings USA, Inc. (“SHUSA”), a subsidiary of Banco Santander, S.A. (“Santander”), approximately 4.1% by Sponsor Auto Finance Holdings Series LP (“Auto Finance Holdings”), approximately 10.0% by DDFS LLC, an entity affiliated with Thomas G. Dundon, the Company’s Chairman and Chief Executive Officer (“CEO”), approximately 25.3% by public shareholders and approximately 0.1% by other holders, primarily members of senior management.
	The Company’s primary business is the indirect origination of retail installment contracts principally through manufacturer-franchised dealers in connection with their sale of new and used vehicles to retail consumers.
	In conjunction with a ten-year private label financing agreement with Chrysler Group (the “Chrysler Agreement”) that became effective May 1, 2013, the Company offers a full spectrum of auto financing products and services to Chrysler customers and dealers under the Chrysler Capital brand. These products and services include consumer retail installment contracts and leases, as well as dealer loans for inventory, construction, real estate, working capital and revolving lines of credit.
	The Company also originates vehicle loans through a Web-based direct lending program, purchases vehicle retail installment contracts from other lenders, and services automobile and recreational and marine vehicle portfolios for other lenders. Additionally, the Company has several relationships through which it provides unsecured consumer loans, private label credit cards and other consumer finance products.
	Basis of Presentation
	The accompanying condensed consolidated financial statements include the accounts of the Company and its subsidiaries, including certain special purpose financing trusts utilized in financing transactions (“Trusts”), which are considered variable interest entities (“VIEs”). The Company consolidates other VIEs for which it was deemed the primary beneficiary. All intercompany balances and transactions have been eliminated in consolidation.
	The accompanying condensed consolidated financial statements as of June 30, 2014 and December 31, 2013, and for the three and six months ended June 30, 2014 and 2013, have been prepared in accordance with United States generally accepted accounting principles (U.S. GAAP) for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by generally accepted accounting principles for complete financial statements. In the opinion of management, these financial statements contain all adjustments, consisting of normal recurring accruals, necessary to present fairly the financial position, results of operations and cash flows for the periods indicated. Results of operations for the periods presented herein are not necessarily indicative of results of operations for the entire year. These financial statements should be read in conjunction with the Company’s Annual Report on Form 10-K for the year ended December 31, 2013.
	The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions which affect the reported amounts of assets and liabilities and the disclosures of contingent assets and liabilities as of the date of the financial statements and the amount of revenue and expenses during the reporting periods. Actual results could differ from those estimates and those differences may be material. These estimates include the determination of loan loss allowance, discount accretion, impairment, expected end-of-term lease residual values, values of repossessed assets, and income taxes. These estimates, although based on actual historical trends and modeling, may potentially show significant variances over time.
	Business Segment Information
	The Company has one reportable segment: Consumer Finance, which includes the Company’s vehicle financial products and services, including retail installment contracts, vehicle leases, and dealer loans, as well as financial products and services related to motorcycles, RVs, and watercraft. It also includes the Company’s unsecured personal loan and point-of-sale financing operations.
	Accounting Policies
	The Company has identified the following significant accounting policies and estimates used by management in the preparation of the Company’s financial statements: retail installment contracts, unsecured consumer loans, receivables from dealers, provision for loan losses, leased vehicles, income taxes, and earnings per share. As of June 30, 2014, there have been no significant changes to the Company's accounting policies as disclosed in the Company’s consolidated financial statements for the year ended December 31, 2013.
	Recently Adopted Accounting Standards
	In July 2013, the FASB issued ASU 2013-11, Income Taxes: Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists. This ASU provides guidance on the presentation of unrecognized tax benefits, particularly the manner in which an entity would settle, at the reporting date, any additional income taxes that would result from the disallowance of a tax position when net operating loss carryforwards, similar tax losses, or tax credit carryforwards exist. This guidance became effective for the Company January 1, 2014 and implementation did not have a significant impact on the Company’s financial position, results of operations, or cash flows.
	Recent Accounting Pronouncements
	In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers, which provides guidance on a single comprehensive model for entities to use in accounting for revenue arising from contracts with customers. This guidance is effective beginning after December 15, 2016. The Company does not expect the adoption to have a material impact to the consolidated financial statements as loan and lease contracts are excluded.
	In June 2014, the FASB issued ASU 2014-11, Repurchase-to-Maturity Transactions, Repurchase Financings, and Disclosures. The standard requires entities to account for repurchase-to-maturity transactions as secured borrowings, eliminates accounting guidance on linked repurchase financing transactions, and expands disclosure requirements related to certain transfers of financial assets that are accounted for as secured borrowings. This guidance is effective for the Company beginning January 1, 2015 and early adoption is not permitted. The Company is currently evaluating the impact of the adoption on its consolidated financial statements.
	In June 2014, the FASB issued ASU 2014-12, Accounting for Share-Based Payments When the Terms of an Award That a Performance Target Could be Achieved after the Requisite Service Period. This standard affects entities that issue share-based payments when the terms of an award stipulate that a performance target could be achieved after an employee completes the requisite service period. This guidance is effective for fiscal years beginning after December 15, 2015 and early adoption is permitted. The Company is currently evaluating the impact of the adoption on its consolidated financial statements.

Finance_Receivables

Finance Receivables	6 Months Ended
	Jun. 30, 2014
Receivables [Abstract]	'
Finance Receivables	'
	Finance Receivables
	Finance receivables held for investment at June 30, 2014 and December 31, 2013, were comprised as follows:
		June 30, 2014
		Retail Installment Contracts Held for Investment
		Loans			Purchased			Total			Receivables from			Unsecured
		Acquired			Receivables						Dealers Held			Consumer
		Individually			Portfolios						for Investment			Loans
	Unpaid principal balance	$	23,675,889		$	1,272,807		$	24,948,696		$	85,885		$	1,448,709
	Loan loss allowance (Note 3)	(2,668,587		)	(197,844		)	(2,866,431		)	(923		)	(212,954		)
	Discount	(659,154		)	(13,679		)	(672,833		)	—			(3,067		)
	Capitalized origination costs and fees	35,169			—			35,169			232			949
	Net carrying balance	$	20,383,317		$	1,061,284		$	21,444,601		$	85,194		$	1,233,637
		December 31, 2013
		Retail Installment Contracts Held for Investment
		Loans			Purchased			Total			Receivables from			Unsecured
		Acquired			Receivables						Dealers Held			Consumer
		Individually			Portfolios						for Investment			Loans
	Unpaid principal balance	$	21,238,281		$	1,961,060		$	23,199,341		$	95,835		$	1,165,778
	Loan loss allowance (Note 3)	(2,132,634		)	(226,356		)	(2,358,990		)	(1,090		)	(179,350		)
	Discount	(573,462		)	(81,216		)	(654,678		)	—			(32,831		)
	Capitalized origination costs and fees	33,936			—			33,936			—			592
	Net carrying balance	$	18,566,121		$	1,653,488		$	20,219,609		$	94,745		$	954,189
	As of June 30, 2014, retail installment contracts and receivables from dealers held for sale totaled $89,404 and $34,387, respectively. As of December 31, 2013, retail installment contracts and receivables from dealers held for sale totaled $56,066 and $26,437, respectively. Sales of retail installment contracts for the three and six months ended June 30, 2014 included principal balance amounts of approximately $1,384,174 and $3,069,898. The Company retains servicing of sold retail installment contracts and was servicing $4,589,650 and $2,847,656 as of June 30, 2014 and December 31, 2013, respectively, of contracts owned by unrelated third parties, including contracts sold by the Company. No receivables from dealers were sold during the six months ended June 30, 2014.
	Retail installment contracts are collateralized by vehicle titles, and the Company has the right to repossess the vehicle in the event the consumer defaults on the payment terms of the contract. Most of the Company’s retail installment contracts held for investment are pledged against warehouse facilities or securitization bonds (Note 6). Most of the creditors on the Company’s retail installment contracts are retail consumers; however, approximately $605,261 and $345,177 of the unpaid principal balance represented fleet contracts with commercial consumers as of June 30, 2014 and December 31, 2013, respectively.
	Borrowers on the Company’s retail installment contracts held for investment are located in Texas (18%), Florida (11%), California (9%), Georgia (5%), and other states each individually representing less than 5% of the Company’s total.
	Receivables from dealers held for investment includes a term loan, which was previously a residual warehouse credit facility, with a third-party vehicle dealer and lender that operates in multiple states. The loan allowed committed borrowings of $50,000 at June 30, 2014 and December 31, 2013, and the facility balance was $50,000 at each of those dates. The term loan will mature on December 1, 2019.
	Borrowers on the Company’s remaining receivables from dealers held for investment, all of which are Chrysler-affiliated, are located in Ohio (31%), New York (19%), California (14%), Tennessee (12%), Louisiana (9%), Mississippi (5%), and other states each individually representing less than 5% of the Company’s total.
	Borrowers on the Company’s unsecured consumer loans are located in California (10%), New York (8%), Texas (8%), Florida (6%), Pennsylvania (5%), and other states each individually representing less than 5% of the Company’s total.
	Changes in accretable yield on the Company’s purchased receivables portfolios for the periods indicated were as follows:
		For the Three Months Ended						For the Six Months Ended
		June 30, 2014			June 30, 2013			June 30, 2014			June 30, 2013
	Balance — beginning of period	$	362,823		$	743,348		$	403,400		$	816,854
	Accretion of accretable yield	(52,519		)	(112,513		)	(117,565		)	(247,712		)
	Reclassifications from (to) nonaccretable difference	(5,050		)	(95,179		)	19,419			(33,486		)
	Balance — end of period	$	305,254		$	535,656		$	305,254		$	535,656
	The Company did not acquire any vehicle loan portfolios for which it was probable at acquisition that not all contractually required payments would be collected during the six months ended June 30, 2014 and 2013. Interest receivable on purchased receivables portfolios totaled $10,516 and $16,950 at June 30, 2014 and December 31, 2013, respectively.

Loan_Loss_Allowance_and_Credit

Loan Loss Allowance and Credit Quality	6 Months Ended
	Jun. 30, 2014
Loans and Leases Receivable, Allowance [Abstract]	'
Loan Loss Allowance and Credit Quality	'
	Loan Loss Allowance and Credit Quality
	Loan Loss Allowance
	The Company estimates loan losses on individually acquired retail installment contracts and unsecured consumer loans held for investment based on delinquency status, historical loss experience, estimated values of underlying collateral, when applicable, and various economic factors. The Company maintains a general loan loss allowance for receivables from dealers based on risk ratings, and individually evaluates the loans for specific impairment as necessary. The activity in the loan loss allowance for individually acquired loans for the three and six months ended June 30, 2014 and 2013 was as follows:
		Three Months Ended June 30, 2014												Three Months Ended June 30, 2013
		Retail Installment				Receivables				Unsecured				Retail Installment			Receivables		Unsecured
		Contracts				from Dealers Held				Consumer Loans				Contracts			from Dealers Held		Consumer Loans
		Acquired				for Investment								Acquired			for Investment
		Individually												Individually
	Balance — beginning of period	$	2,444,552			$	1,035			$	203,190			$	1,660,612		$	—	$	—
	Provision for loan losses	527,362				(112		)		70,212				375,281			1,490		39,256
	Charge-offs	(700,965		)		—				(66,966		)		(369,395		)	—		(6		)
	Recoveries	397,638				—				6,518				197,815			—		—
	Balance — end of period	$	2,668,587			$	923			$	212,954			$	1,864,313		$	1,490	$	39,250
	The loan loss allowance for receivables from dealers is comprised entirely of general allowances as none of these receivables have been determined to be individually impaired.
		Six Months Ended June 30, 2014												Six Months Ended June 30, 2013
		Retail Installment				Receivables				Unsecured				Retail Installment			Receivables		Unsecured
		Contracts				from Dealers Held				Consumer Loans				Contracts			from Dealers Held		Consumer Loans
		Acquired				for Investment								Acquired			for Investment
		Individually												Individually
	Balance — beginning of period	$	2,132,634			$	1,090			$	179,350			$	1,555,362		$	—	$	—
	Provision for loan losses	1,184,068				(167		)		132,341				626,922			1,490		39,256
	Charge-offs	(1,453,530		)		—				(107,914		)		(754,121		)			(6		)
	Recoveries	805,415				—				9,177				436,150			—		—
	Balance — end of period	$2,668,587				$	923			$	212,954			$	1,864,313		$	1,490	$	39,250
	The activity in the impairment reserves related to purchased receivables portfolios for the three and six months ended June 30, 2014 and 2013 was as follows:
		Three Months Ended								Six Months Ended
		June 30,								June 30,
		2014				2013				2014				2013
	Balance — beginning of period	$	206,170			$	184,192			$	226,356			$	218,640
	Incremental provisions for purchased receivable portfolios	350				18,314				1,675				39,976
	Incremental reversal of provisions for purchased receivable portfolios	(8,676		)		(25,930		)		(30,187		)		(82,040		)
	Balance — end of period	$	197,844			$	176,576			$	197,844			$	176,576
	Delinquencies
	Retail installment contracts and unsecured consumer amortizing term loans are classified as non-performing when they are greater than 60 days past due as to contractual principal or interest payments. At the time a loan is placed on non-accrual status, previously accrued and uncollected interest is reversed against interest income. If an account is returned to a performing status of 60 days or less past due, the Company returns to accruing interest on the contract. The accrual of interest on revolving unsecured consumer loans continues until the loan is charged off. A summary of delinquencies as of June 30, 2014 and December 31, 2013 is as follows:
		June 30, 2014
		Retail Installment Contracts Held for Investment												Receivables			Unsecured
														from Dealers Held			Consumer
		Loans				Purchased				Total				for Investment			Loans
		Acquired				Receivables
		Individually				Portfolios
	Principal, current	$	21,047,173			$	981,616			$	22,028,789			$	85,885		$	1,283,884
	Principal, 31-60 days past due	1,829,261				194,069				2,023,330				—			45,382
	Delinquent principal over 60 days	799,455				97,122				896,577				—			119,443
	Total principal	$	23,675,889			$	1,272,807			$	24,948,696			$	85,885		$	1,448,709
		December 31, 2013
		Retail Installment Contracts Held for Investment												Receivables			Unsecured
														from Dealers Held			Consumer
		Loans				Purchased				Total				for Investment			Loans
		Acquired				Receivables
		Individually				Portfolios
	Principal, current	$	18,653,827			$	1,457,813			$	20,111,640			$	95,835		$	1,072,316
	Principal, 31-60 days past due	1,729,139				321,549				2,050,688				—			28,102
	Delinquent principal over 60 days	855,315				181,698				1,037,013				—			65,360
	Total principal	$	21,238,281			$	1,961,060			$	23,199,341			$	95,835		$	1,165,778
	As of June 30, 2014 and December 31, 2013, there were no receivables held for sale that were non-performing.
	FICO® Distribution — A summary of the credit risk profile of the Company’s consumer loans by FICO® distribution, determined at origination, as of June 30, 2014 and December 31, 2013 was as follows:
	June 30, 2014
			Retail Installment		Unsecured
			Contracts Held		Consumer
	FICO Band		for Investment		Loans
	<540		26.70%		10.00%
	540-599		32.30%		21.30%
	600-659		26.50%		40.90%
>660		14.50%		27.80%
December 31, 2013
		Retail Installment		Unsecured
		Contracts Held		Consumer
FICO Band		for Investment		Loans
<540		26.80%		6.30%
540-599		31.80%		24.20%
600-659		26.30%		39.40%
>660		15.10%		30.10%
Commercial Lending Credit Quality Indicators — The credit quality of receivables from dealers, which are considered commercial loans, is summarized according to standard regulatory classifications as follows:
Pass — Asset is well protected by the current net worth and paying capacity of the obligor or guarantors, if any, or by the fair value less costs to acquire and sell any underlying collateral in a timely manner.
Special Mention — Asset has potential weaknesses that deserve management’s close attention, which, if left uncorrected, may result in deterioration of the repayment prospects for an asset at some future date. Special Mention assets are not adversely classified.
Substandard — Asset is inadequately protected by the current net worth and paying capacity of the obligor or by the collateral pledged, if any. A well-defined weakness or weaknesses exist that jeopardize the liquidation of the debt. The loans are characterized by the distinct possibility that the Company will sustain some loss if deficiencies are not corrected.
Doubtful — Exhibits the inherent weaknesses of a substandard credit. Additional characteristics exist that make collection or liquidation in full highly questionable and improbable, on the basis of currently known facts, conditions and values. Possibility of loss is extremely high, but because of certain important and reasonable specific pending factors which may work to the advantage and strengthening of the credit, an estimated loss cannot yet be determined.
Loss — Credit is considered uncollectible and of such little value that it does not warrant consideration as an active asset. There may be some recovery or salvage value, but there is doubt as to whether, how much or when the recovery would occur.
Commercial loan credit quality indicators for receivables from dealers held for investment as of June 30, 2014 and December 31, 2013 were as follows:
	June 30,				December 31,
	2014				2013
Pass	$	83,754			$	95,835
Special Mention	2,131				—
Substandard	—				—
Doubtful	—				—
Loss	—				—
	$	85,885			$	95,835
Troubled Debt Restructurings
In certain circumstances, the Company modifies the terms of its finance receivables to troubled borrowers. Modifications may include a reduction in interest rate, an extension of the maturity date, rescheduling future cash flows, or a combination thereof. A modification of finance receivable terms is considered a troubled debt restructuring (“TDR”) if the Company grants a concession to a borrower for economic or legal reasons related to the debtor’s financial difficulties which would not otherwise have been considered. Management considers TDRs to include all individually acquired retail installment contracts that have been modified at least once, deferred for a period of 90 days or more, or deferred at least twice during the period. Additionally, modifications set forth through bankruptcy proceeding are deemed to be TDRs by the Company. The purchased receivables portfolio is excluded from the scope of the applicable guidance. As of June 30, 2014 and December 31, 2013, there were no receivables from dealers classified as a TDR.
The table below presents the Company’s loans modified in TDRs as of June 30, 2014 and December 31, 2013:
	June 30, 2014								December 31, 2013
	Retail Installment Contracts				Unsecured Consumer Loans				Retail Installment Contracts				Unsecured Consumer Loans
Total TDR principal	$	3,151,614			$	19,540			$	2,604,351			$	8,391
Accrued interest	85,218				—				70,965				—
Discount	(87,743		)		(58		)		(70,321		)		(274		)
Origination costs	4,682				18				4,161				5
Outstanding recorded investment	3,153,771				19,500				2,609,156				8,122
Allowance for loan losses	(551,767		)		(6,040		)		(475,128		)		(2,345		)
Outstanding recorded investment, net of allowance	$	2,602,004			$	13,460			$	2,134,028			$	5,777
A summary of the Company’s performing and non-performing TDRs at June 30, 2014 and December 31, 2013, is as follows:
	June 30, 2014								December 31, 2013
	Retail Installment Contracts				Unsecured Consumer Loans				Retail Installment Contracts				Unsecured Consumer Loans
Current	$	2,171,354			$	13,008			$	1,690,893			$	6,120
31-60 days past due	635,787				972				556,489				875
Greater than 60 days past due (non-performing)	344,473				5,560				356,969				1,396
Total TDRs	$	3,151,614			$	19,540			$	2,604,351			$	8,391
A loan that has been classified as a TDR remains so until the loan is liquidated through payoff or charge-off. Consistent with other of the Company’s retail installment contracts, TDRs are placed on nonaccrual status when the account becomes past due more than 60 days, and return to accrual status when the account is 60 days or less past due. Average recorded investment and income recognized on TDR loans are as follows:
	Three Months Ended															Six Months Ended
	June 30, 2014								June 30, 2013							June 30, 2014					June 30, 2013
	Retail Installment Contracts				Unsecured Consumer Loans				Retail Installment Contracts				Unsecured Consumer Loans			Retail Installment Contracts		Unsecured Consumer Loans			Retail Installment Contracts		Unsecured Consumer Loans
Average outstanding recorded investment in TDRs	$	2,979,944			$	14,570			$	1,683,372			$	62		$	2,856,348	$	12,510		$	1,628,540	$	41
Interest income recognized	$	112,138			$	391			$	38,260			$	1		$	232,589	$	720		$	130,401	$	1
TDR Impact on Allowance for Loan Losses
Prior to a loan being classified as a TDR, the Company generally estimates an appropriate allowance for loan loss based on delinquency status, the Company’s historical loss experience, estimated values of underlying collateral, and various economic factors. Once a loan has been classified as a TDR, impairment is measured based on present value of expected future cash flows considering all available evidence, including collateral values.
The following table summarizes the financial effects of loan modifications accounted for as TDRs that occurred during the three and six months ended June 30, 2014 and 2013:
	Three Months Ended
	June 30, 2014								June 30, 2013
	Retail Installment Contracts				Unsecured Consumer Loans				Retail Installment Contracts				Unsecured Consumer Loans
Troubled Debt Restructurings:
Outstanding recorded investment before TDR	$	743,664			$	4,637			$	473,775			$	150
Outstanding recorded investment after TDR	$	699,158			$	4,573			$	444,971			$	149
Number of contracts	44,524				4,116				29,797				143
	Six Months Ended
	June 30, 2014								June 30, 2013
	Retail Installment Contracts				Unsecured Consumer Loans				Retail Installment Contracts				Unsecured Consumer Loans
Troubled Debt Restructurings:
Outstanding recorded investment before TDR	$	1,367,673			$	6,748			$	764,636			$	150
Outstanding recorded investment after TDR	$	1,280,211			$	6,667			$	733,812			$	149
Number of contracts	83,753				6,135				50,271				143
For retail installment contracts, a TDR is considered to have subsequently defaulted at the earlier of the date of repossession or 120 days past due after becoming a TDR. For unsecured consumer loans, a TDR is considered to have subsequently defaulted upon charge off, which for revolving unsecured loans is generally at 180 days past due. Loan modifications accounted for as TDRs within the previous 12 months that subsequently defaulted during the three and six months ended June 30, 2014 and 2013 are summarized in the following table:
	Three Months Ended
	June 30, 2014						June 30, 2013
	Retail Installment Contracts				Unsecured Consumer Loans		Retail Installment Contracts				Unsecured Consumer Loans
Troubled debt restructurings that subsequently defaulted	$	70,811			(a)		$	24,471			$	—
Number of contracts	7,234				(a)		2,609				—
	Six Months Ended
	June 30, 2014						June 30, 2013
	Retail Installment Contracts				Unsecured Consumer Loans		Retail Installment Contracts				Unsecured Consumer Loans
Troubled debt restructurings that subsequently defaulted	$	120,275			(a)		$	38,491			$	—
Number of contracts	13,123				(a)		4,234				—
(a) Subsequent defaults on unsecured consumer loan TDRs were immaterial for the periods presented.

Leased_Vehicles_Net

Leased Vehicles, Net	6 Months Ended
	Jun. 30, 2014
Leases [Abstract]	'
Leased Vehicles, net	'
	Leased Vehicles, net
	Leased vehicles consisted of the following as of June 30, 2014 and December 31, 2013:
		June 30,			December 31,
		2014			2013
	Leased vehicles	$	4,481,384		$	2,402,052
	Origination fees and other costs	1,157			2,716
	Manufacturer subvention payments	(495,597		)	(259,152		)
		3,986,944			2,145,616
	Less: accumulated depreciation	(419,398		)	(122,183		)
		$	3,567,546		$	2,023,433
	The following summarizes the future minimum rental payments due to the Company as lessor under operating leases as of June 30, 2014:
	Remainder of 2014	$	318,976
	2015	616,414
	2016	472,417
	2017	90,436
	2018	96
	Thereafter	—
	Total	$	1,498,339

Debt

Debt	6 Months Ended
	Jun. 30, 2014
Debt Disclosure [Abstract]	'
Debt	'
	Debt
	Revolving Credit Facilities
	The following table presents information regarding credit facilities as of June 30, 2014 and December 31, 2013:
		June 30, 2014
		Maturity Date(s)	Utilized Balance		Committed Amount		Effective Rate	Assets Pledged		Restricted Cash Pledged
	Warehouse line (a)	Jul-14	$	109,461	$	500,000	2.05%	$	158,591	$	172
	Warehouse line	Various (b)	552,268		1,235,038		1.14%	816,330		25,768
	Warehouse line (c)	Jan-16	1,318,088		4,550,000		1.15%	1,756,086		35,685
	Warehouse line	Dec-15	464,037		2,000,000		2.18%	570,306		11,993
	Warehouse line	Jul-15	153,515		500,000		1.64%	191,391		7,532
	Warehouse line (d)	Sep-15	196,880		200,000		1.97%	290,043		12,054
	Repurchase facility (e)	Various	747,342		747,342		1.52%	844,305		—
	Warehouse line	Dec-15	495,765		750,000		0.91%	675,143		10,083
	Warehouse line (f)	Nov-16	175,000		175,000		1.71%	—		—
	Warehouse line (g)	Mar-15	250,594		250,594		0.99%	296,929		—
	Total facilities with third parties		4,462,950		10,907,974			5,599,124		103,287
	Lines of credit with Santander and related subsidiaries (h):
	Line of credit	Dec-16	500,000		500,000		2.45%	1,623		—
	Line of credit	Dec-18	—		500,000		0.25%	—		—
	Line of credit	Dec-16	1,750,000		1,750,000		2.26%	—		—
	Line of credit	Dec-18	750,000		1,750,000		2.59%	187,555		—
	Line of credit	Mar-17	300,000		300,000		1.70%	—		—
	Total facilities with Santander and related subsidiaries		3,300,000		4,800,000			189,178		—
	Total revolving credit facilities		$	7,762,950	$	15,707,974		$	5,788,302	$	103,287
		December 31, 2013
		Maturity Date(s)	Utilized Balance		Committed Amount		Effective Rate	Assets Pledged		Restricted Cash Pledged
	Warehouse line	Jun-14	$	483,738	$	500,000	0.82%	$	757,352	$	—
	Warehouse line	Various	159,300		1,219,474		3.62%	232,015		3,667
	Warehouse line	Apr-14	613,600		4,550,000		2.12%	745,759		15,184
	Warehouse line	Jun-15	1,360,070		2,000,000		0.96%	1,672,082		42,510
	Warehouse line	Jul-15	495,786		500,000		0.85%	598,754		25,056
	Warehouse line	Sep-15	73,080		200,000		2.84%	76,807		2,701
	Repurchase facility	Various	879,199		879,199		1.59%	—		—
	Warehouse line	Dec-15	210,000		750,000		1.84%	302,632		—
	Warehouse line	Nov-16	175,000		175,000		1.72%	—		—
	Total facilities with third parties		4,449,773		10,773,673			4,385,401		89,118
	Lines of credit with Santander and related subsidiaries:
	Line of credit	Dec-16	500,000		500,000		2.48%	10,674		—
	Line of credit	Dec-18	—		500,000		3.10%	—		—
	Line of credit	Dec-16	1,750,000		1,750,000		2.09%	—		—
	Line of credit	Dec-18	1,400,000		1,750,000		2.58%	93,969		—
	Total facilities with Santander and related subsidiaries		3,650,000		4,500,000			104,643		—
	Total revolving credit facilities		$	8,099,773	$	15,273,673		$	4,490,044	$	89,118
	(a)	In July 2014, the maturity date of this facility was extended to June 2015.
	(b)	Half of the outstanding balance on this facility matures in March 2015 and half in March 2016.
	(c)	This line is held exclusively for Chrysler Capital retail loan and lease financing, with lease financing comprising no more than 50% of the outstanding balance upon advance. In July 2014, the committed amount was reduced to $4.3 billion and the maturity date was extended to June 2016.
	(d)	This line is held exclusively for unsecured consumer term loans.
	(e)	The repurchase facility is also collateralized by securitization notes payable retained by the Company. No portion of this facility is unsecured. This facility has rolling 30-day and 90-day maturities.
	(f)	This line is collateralized by residuals retained by the Company.
	(g)	This line is collateralized by securitization notes payable retained by the Company.
	(h)	These lines are also collateralized by securitization notes payable and residuals retained by the Company. As of June 30, 2014 and December 31, 2013, $1,569,930 and $1,123,354, respectively, of the aggregate outstanding balances on these facilities were unsecured.
	Facilities with Third Parties
	The warehouse lines and repurchase facility are fully collateralized by a designated portion of the Company’s retail installment contracts (Note 2), leased vehicles (Note 4), securitization notes payables and residuals retained by the Company. The Company was in compliance with all covenants related to these financing arrangements at June 30, 2014.
	Lines of Credit with Santander and Related Subsidiaries
	Through its New York branch, Banco Santander provides the Company with $4,500,000 of long-term committed revolving credit facilities. Through SHUSA, under an agreement entered into on March 6, 2014, Santander provides the Company with an additional $300,000 of committed revolving credit, collateralized by residuals retained on its own securitizations. The fundings through the New York branch and through SHUSA are collectively known as the “Santander Credit Facilities.”
	The facilities offered through the New York branch are structured as three- and five- year floating rate facilities, with current maturity dates of December 31, 2016 and December 31, 2018. Santander has the option to continue to renew the term of these facilities annually going forward, thereby maintaining the three and five year maturities. These facilities currently permit unsecured borrowing but generally are collateralized by retail installment contracts and retained residuals. Any secured balances outstanding under the facilities at the time of their maturity will amortize to match the maturities and expected cash flows of the corresponding collateral.
	Secured Structured Financings
	The following table presents information regarding secured structured financings as of June 30, 2014 and December 31, 2013:
		June 30, 2014
		Original Estimated Maturity Date(s)	Balance		Initial Note Amounts Issued		Initial Weighted Average Interest Rate	Collateral		Restricted Cash
	2010 Securitizations	October 2016 - November 2017	$	333,148	$	3,671,749	1.04%-1.44%	$	641,669	$	142,992
	2011 Securitizations	October 2015 - September 2017	653,968		4,693,289		1.21%-2.80%	1,038,660		157,307
	2012 Securitizations	November 2017 - December 2018	3,088,855		8,023,840		0.92%-1.68%	3,899,764		355,658
2013 Securitizations	January 2019 - January 2021	4,338,610		6,689,700		0.89%-1.59%	5,295,330		348,040
2014 Securitizations	April 2020 - August 2020	3,706,441		4,100,000		1.63%-1.72%	4,385,840		236,269
Public securitizations		12,121,022		27,178,578			15,261,263		1,240,266
2010 Private issuances	Jun-11	209,128		516,000		1.29%	338,513		9,538
2011 Private issuances	Dec-18	1,222,065		4,856,525		1.46%-1.80%	1,652,724		56,942
2012 Private issuances	May-16	14,962		70,308		1.07%	20,177		1,874
2013 Private issuances	September 2018 - September 2020	2,411,661		2,693,754		1.13%-1.38%	3,249,917		89,031
2014 Private issuances	March 2018 - August 2021	2,412,822		2,680,379		1.09%-1.85%	2,965,196		112,116
Privately issued amortizing notes		6,270,638		10,816,966			8,226,527		269,501
Total secured structured financings		$	18,391,660	$	37,995,544		$	23,487,790	$	1,509,767
	December 31, 2013
	Original Estimated Maturity Date(s)	Balance		Initial Note Amounts Issued		Initial Weighted Average Interest Rate	Collateral		Restricted Cash
2010 Securitizations	October 2016 - November 2017	$	632,251	$	4,671,749	1.04%-1.44%	$	1,143,435	$	205,190
2011 Securitizations	October 2015 - September 2017	1,218,208		5,605,609		1.21%-2.80%	1,634,220		195,854
2012 Securitizations	November 2017 - December 2018	4,061,127		8,023,840		0.92%-1.68%	5,013,135		383,677
2013 Securitizations	January 2019 - January 2021	5,503,580		6,689,700		0.89%-1.59%	6,465,840		351,160
Public securitizations		11,415,166		24,990,898			14,256,630		1,135,881
2010 Private issuances	Jun-11	219,704		516,000		1.29%	378,434		8,435
2011 Private issuances	Dec-18	662,138		4,856,525		1.46%-1.80%	908,304		36,449
2012 Private issuances	May-16	30,526		70,308		1.07%	35,378		3,016
2013 Private issuances	September 2018 - September 2020	2,868,353		2,693,754		1.13%-1.38%	3,554,569		97,100
Privately issued amortizing notes		3,780,721		8,136,587			4,876,685		145,000
Total secured structured financings		$	15,195,887	$	33,127,485		$	19,133,315	$	1,280,881
Notes Payable — Secured Structured Financings
The principal and interest on secured structured financings are paid using the cash flows from the underlying retail installment contracts, loans and leases, which serve as collateral for the notes. Accordingly, the timing of the principal payments on these notes is dependent on the payments received on the underlying collateral.
Most of the Company’s secured structured financings are in the form of public, SEC-registered securitizations. The Company also executes private securitizations under Rule 144A of the Securities Act and periodically issues private term amortizing notes, which are structured similarly to securitizations but are acquired by banks and conduits. Historically, all of the Company’s securitizations and private issuances have been collateralized by vehicle retail installment contracts and loans; however, in 2013, the Company issued its first amortizing notes backed by vehicle leases. As of June 30, 2014, the Company had private issuances of notes backed by vehicle leases totaling approximately $1,433,658.
Unamortized debt issuance costs are amortized as interest expense over the terms of the related notes payable using a method that approximates the effective interest method. Amortization of premium or accretion of discount on acquired notes payable is also included in interest expense using a method that approximates the effective interest method, over the estimated remaining life of the acquired notes. Total interest expense on secured structured financings for the three months ended June 30, 2014 and 2013 was $57,217 and $56,626, respectively. Total interest expense on secured structured financings for the six months ended June 30, 2014 and 2013 was $117,079 and $114,336, respectively.

Variable_Interest_Entities

Variable Interest Entities	6 Months Ended
	Jun. 30, 2014
Servicing Asset At Amortized Value Additional Disclosures [Abstract]	'
Variable Interest Entities	'
	The Company transfers retail installment contracts and leased vehicles into newly formed Trusts which then issue one or more classes of notes payable backed by the collateral. The Company’s continuing involvement with the credit facilities and Trusts are in the form of servicing loans held by special purpose financing Trusts and, except for the Chrysler Capital securitizations, through holding a residual interest in the Trust. These transactions are structured without recourse. The Trusts are considered variable interest entities ("VIEs") under U.S. GAAP and, except for the Chrysler Capital securitizations, are consolidated because the Company has: (a) power over the significant activities of the entity as servicer of its financial assets and (b) the residual interest and in some cases debt securities held by the Company, an obligation to absorb losses or the right to receive benefits from the VIE which are potentially significant to the VIE. The Company did not retain any debt or equity interests in the Chrysler Capital securitizations executed in 2013 and 2014, and recorded these transactions as sales of the associated retail installment contracts.
	The collateral, borrowings under credit facilities and securitization notes payable of the consolidated Trusts remain on the consolidated balance sheets. The Company recognizes finance charges and fee income on the retail installment contracts and leased vehicles and interest expense on the debt, and records a provision for loan losses to cover probable inherent losses on the contracts. All of the Trusts are separate legal entities and the collateral and other assets held by these subsidiaries are legally owned by them and are not available to other creditors.
	The Company also uses a titling trust to originate and hold its leases, in order to facilitate the pledging of leases to financing facilities or sale of leases to other parties without incurring the costs and administrative burden of retitling the leased vehicles. The titling trust, and each special unit of beneficial interest ("SUBI") in the titling trust such as those transferred to financing facilities or other parties, is considered a VIE.
	The following table summarizes the assets and liabilities related to VIEs included in the Company’s consolidated financial statements:
		June 30,		December 31,
		2014		2013
	Restricted cash	$	1,613,054	$	1,370,174
	Retail installment contracts, net	21,020,328		19,166,392
	Leased vehicles, net	3,567,546		2,023,433
	Various other assets	901,100		541,469
	Notes payable	26,297,908		23,810,950
	Various other liabilities	49,983		25,682
	A summary of the cash flows received from securitization trusts during the three and six months ended June 30, 2014 and 2013, is as follows:
		Three Months Ended				Six Months Ended
		June 30, 2014		June 30, 2013		June 30, 2014		June 30, 2013
	Receivables securitized	$	5,051,048	$	1,317,633	$	9,141,478	$	4,121,367
	Net proceeds from securitizations (a)	$	4,707,336	$	1,136,460	$	8,206,756	$	3,586,460
	Cash received for servicing fees	157,698		107,848		306,257		209,436
	Cash received upon release from reserve and	60		2,806		810		6,225
	restricted cash accounts
	Net distributions from Trusts	384,093		431,723		710,812		759,290
	Total cash received from securitization trusts	$	5,249,187	$	1,678,837	$	9,224,635	$	4,561,411
	(a) Includes additional advances on existing securitizations
	The Company retains servicing responsibility for receivables transferred to the Trusts and receives a monthly servicing fee on the outstanding principal balance. Supplemental fees, such as late charges, for servicing the receivables are reflected in fees, commissions and other income. As of June 30, 2014 and December 31, 2013, the Company was servicing $24,344,700 and $21,935,874, respectively, of gross retail installment contracts that have been transferred to consolidated Trusts. The remainder of the Company’s retail installment contracts is either pledged in private issuances or warehouse facilities or unpledged.
	During the six months ended June 30, 2014, the Company sold $774,183 of gross retail installment contracts in off-balance sheet securitizations for a gain of approximately $32,538. During the three months ended June 30, 2014, the Company executed no off-balance sheet securitizations. As of June 30, 2014 and December 31, 2013, the Company was servicing $1,528,072 and $1,017,756, respectively, of gross retail installment contracts that have been sold in these off-balance sheet Chrysler Capital securitizations.

Derivative_Financial_Instrumen

Derivative Financial Instruments	6 Months Ended
	Jun. 30, 2014
Derivative Instruments and Hedging Activities Disclosure [Abstract]	'
Derivative Financial Instruments	'
	Derivative Financial Instruments
	Certain of the Company’s interest rate swap agreements are designated as cash flow hedges for accounting purposes. The Company’s remaining interest rate swap agreements, as well as its interest rate cap agreements, the corresponding options written in order to offset the interest rate cap agreements, and a total return swap, are not designated as hedges for accounting purposes. The underlying notional amounts and aggregate fair values of these agreements at June 30, 2014 and December 31, 2013, were as follows:
		June 30, 2014						December 31, 2013
		Notional			Fair Value			Notional			Fair Value
	Interest rate swap agreements designated as cash flow hedges	$	6,057,000		$	(7,592	)	$	3,873,000		$	(5,686	)
	Interest rate swap agreements not designated as hedges	2,841,861			(23,041		)	3,444,459			(31,360		)
	Interest rate cap agreements	6,398,207			46,631			4,616,960			28,274
	Options for interest rate cap agreements	6,398,207			(46,677		)	4,616,960			(28,389		)
	Total return swap	250,594			—			—			—
	The aggregate fair value of the interest rate swap agreements was included on the Company’s consolidated balance sheets in other assets and other liabilities, as appropriate. The interest rate cap agreements were included in other assets and the related options in other liabilities on the Company’s consolidated balance sheets.
	In March 2014, the Company entered into a financing arrangement with a third party where by the Company pledged certain bonds retained in its own securitizations in exchange for approximately $250,594 in cash. In conjunction with the financing arrangement, the Company entered into a total return swap related to the bonds as an effective avenue to monetize the Company’s retained bonds as a source of financing. The Company will receive the fixed return on the bonds in exchange for paying a variable rate of three-month LIBOR plus 75 basis points. In addition, at maturity, the Company will receive a payment from, or make a payment to, the counterparty based on the change in fair value of the bonds during the one-year term of the facility. Throughout the term of the facility, the party in a net liability position must post collateral. The Company has the ability to substitute collateral and may do so if a bond is set to begin amortizing. Alternatively, the amortization may be utilized to reduce the notional amount of the facility.
	The Company enters into legally enforceable master netting agreements which reduce risk by permitting netting of transactions, such as derivatives and collateral posting, with the same counterparty on the occurrence of certain events. A master netting agreement allows two counterparties the ability to net-settle amounts under all contracts, including any related collateral posted, through a single payment. The right to offset and certain terms regarding the collateral process, such as valuation, credit events and settlement, are contained in ISDA master agreements.
	Information on the offsetting of derivative assets and derivative liabilities due to the right of offset was as follows, as of June 30, 2014 and December 31, 2013:
		Offsetting of Financial Assets
											Gross Amounts Not Offset in the
											Consolidated Balance Sheet
		Gross			Gross Amounts			Net Amounts of Assets Presented			Financial			Cash			Net
		Amounts of			Offset in the			in the			Instruments			Collateral			Amount
		Recognized			Consolidated			Consolidated						Received
		Assets			Balance Sheet			Balance Sheet
	June 30, 2014
	Interest rate swaps - Santander & affiliates	$	537		$	—		$	537		$	—		$	—		$	537
	Interest rate caps - Santander & affiliates	33,201			—			33,201			—			—			33,201
	Interest rate caps - third party	13,430			—			13,430			—			—			13,430
	Total derivatives subject to a master netting arrangement or similar arrangement	47,168			—			47,168			—			—			47,168
	Total derivatives not subject to a master netting arrangement or similar arrangement	—			—			—			—			—			—
	Total derivative assets	$	47,168		$	—		$	47,168		$	—		$	—		$	47,168
	Total financial assets	$	47,168		$	—		$	47,168		$	—		$	—		$	47,168
	December 31, 2013
	Interest rate swaps - Santander & affiliates	$	1,601		$	—		$	1,601		$	—		$	—		$	1,601
	Interest rate caps - Santander & affiliates	9,342			—			9,342			—			—			9,342
	Interest rate caps - third party	18,932			—			18,932			—			—			18,932
	Total derivatives subject to a master netting arrangement or similar arrangement	29,875			—			29,875			—			—			29,875
	Total derivatives not subject to a master netting arrangement or similar arrangement	—			—			—			—			—			—
	Total derivative assets	$	29,875		$	—		$	29,875		$	—		$	—		$	29,875
	Total financial assets	$	29,875		$	—		$	29,875		$	—		$	—		$	29,875
		Offsetting of Financial Liabilities
														Gross Amounts Not Offset in the
														Consolidated Balance Sheet
		Gross			Gross Amounts			Net Amounts of Liabilities Presented			Financial			Cash			Net
		Amounts of			Offset in the			in the			Instruments			Collateral			Amount
		Recognized			Consolidated			Consolidated						Pledged
		Liabilities			Balance Sheet			Balance Sheet
	June 30, 2014
	Interest rate swaps - Santander & affiliates	$	31,169		$	(9,612	)	$	21,557		$	—		$	—		$	21,557
	Back to back - Santander & affiliates	33,201			(32,369		)	$	832		$	—		$	—		$	832
	Back to back - third party	13,476			(13,476		)	—			—			—			—
	Total derivatives subject to a master netting arrangement or similar arrangement	77,846			(55,457		)	22,389			—			—			22,389
	Total derivatives not subject to a master netting arrangement or similar arrangement	—			—			—			—			—			—
	Total derivative liabilities	$	77,846		$	(55,457	)	$	22,389		$	—		$	—		$	22,389
	Total financial liabilities	$	77,846		$	(55,457	)	$	22,389		$	—		$	—		$	22,389
	December 31, 2013
	Interest rate swaps - Santander & affiliates	$	38,647		$	(2,258	)	$	36,389		$	—		$	—		$	36,389
	Back to back - Santander & affiliates	9,342			(9,342		)	—			—			—			—
	Back to back - third party	19,047			(15,420		)	3,627			—			—			3,627
	Total derivatives subject to a master netting arrangement or similar arrangement	67,036			(27,020		)	40,016			—			—			40,016
	Total derivatives not subject to a master netting arrangement or similar arrangement	—			—			—			—			—			—
	Total derivative liabilities	$	67,036		$	(27,020	)	$	40,016		$	—		$	—		$	40,016
	Total financial liabilities	$	67,036		$	(27,020	)	$	40,016		$	—		$	—		$	40,016
	The Company is the holder of a warrant that gives it the right, if certain vesting conditions are satisfied, to purchase additional shares in a company in which it has a cost method investment. This warrant was issued in 2012 and is carried at its estimated fair value of zero at June 30, 2014 and December 31, 2013.
	The gross gains (losses) reclassified from accumulated other comprehensive income to net income, and  gains (losses) recognized in net income, are included as components of interest expense. The Company’s interest rate swap agreements had effects on its consolidated statements of income and comprehensive income for the three and six months ended June 30, 2014 and 2013 as follows:
		Three Months Ended									Three Months Ended
		June 30, 2014									June 30, 2013
	Gains  (Losses)			Gross Gains (Losses)			Gross Gains (Losses)			Gains (Losses)			Gross Gains (Losses)			Gross Gains (Losses)
	Recognized  in			Recognized in			Reclassified From			Recognized in			Recognized in			Reclassified From
	Interest  Expense			Accumulated  Other			Accumulated  Other			Interest Expense			Accumulated  Other			Accumulated  Other
				Comprehensive			Comprehensive  Income to Interest Expense						Comprehensive			Comprehensive  Income
				Income									Income			to Interest Expense
Interest rate swap agreements designated as cash flow hedges	$	(47	)	$	(7,246	)	$	(1,931	)	$	—		$	(1,155	)	$	(4,444	)
Derivative instruments not designated as hedges	$	3,199								$	10,682
	Six Months Ended									Six Months Ended
	June 30, 2014									June 30, 2013
	Gains (Losses)			Gross Gains (Losses)			Gross Gains (Losses)			Gains (Losses)			Gross Gains (Losses)			Gross Gains (Losses)
	Recognized in			Recognized in			Reclassified From			Recognized in			Recognized in			Reclassified From
	Interest  Expense			Accumulated  Other			Accumulated  Other			Interest  Expense			Accumulated  Other			Accumulated Other
				Comprehensive			Comprehensive  Income To Interest Expense						Comprehensive			Comprehensive  Income
				Income									Income			to Interest Expense
Interest rate swap agreements designated as cash flow hedges	$	91		$	(6,592	)	$	(4,595	)	$	—		$	(1,660	)	$	(9,439	)
Derivative instruments not designated as hedges	$	8,388								$	17,339
The ineffectiveness related to the interest rate swap agreements designated as cash flow hedges was not material for the six months ended June 30, 2014 and 2013.

Other_Assets

Other Assets	6 Months Ended
	Jun. 30, 2014
Other Assets [Abstract]	'
Other Assets	'
	Other Assets
	Other assets were comprised as follows:
		June 30,		December 31,
		2014		2013
	Upfront fee (a)	$	132,500	$	140,000
	Inventory of repossessed vehicles	140,792		129,323
	Manufacturer subvention payments receivable (a)	73,240		55,579
	Derivative assets (Note 7)	47,168		29,875
	Indemnification payments receivable (b)	8,603		8,603
	Other	90,884		46,925
		$	493,187	$	410,305
	(a)	These amounts relate to the Chrysler agreement. The Company paid a $150,000 upfront fee at the effective date of the agreement. This fee is being amortized into finance and other interest income over the ten-year term of the agreement. As the preferred financing provider for Chrysler, the Company is entitled to subvention payments on loans and leases with below-market customer payments.
	(b)	This amount represents tax indemnification payments to the original equity investors in two investment partnerships now owned by the Company. These payments are expected to be recovered through tax refunds passed through to the Company as the original investors recognize losses related to the investments.

Income_Taxes

Income Taxes	6 Months Ended
	Jun. 30, 2014
Income Tax Disclosure [Abstract]	'
Income Taxes	'
	Income Taxes
	The Company recorded income tax expense of $143,643 (36.8% effective tax rate) and $191,684 (36.9% effective tax rate) during the three and six months ended June 30, 2014, respectively. The Company recorded income tax expense of $104,129 (36.5% effective tax rate) and $256,927 (35.3% effective tax rate) during the three and six months ended June 30, 2013, respectively. The effective tax rate increased primarily due to a partial release of a valuation allowance during the six months ended June 30, 2013 versus a build in the valuation allowance during the six months ended June 30, 2014.
	Significant judgment is required in evaluating and reserving for uncertain tax positions. Although management believes adequate reserves have been established for all uncertain tax positions, the final outcomes of these matters may differ. Management does not believe the outcome of any uncertain tax position, individually or combined, will have a material effect on the results of operations. The reserve for uncertain tax positions, as well as associated penalties and interest, are a component of the income tax provision.

Commitments_and_Contingencies

Commitments and Contingencies	6 Months Ended
	Jun. 30, 2014
Commitments and Contingencies Disclosure [Abstract]	'
Commitments and Contingencies	'
	Commitments and Contingencies
	In connection with the sale of retail installment contracts through securitizations and other sales, the Company has made standard representations and warranties customary to the consumer finance industry. Violations of these representations and warranties may require the Company to repurchase loans previously sold to on- or off-balance sheet trusts or other third parties. As of June 30, 2014, the Company had no repurchase requests outstanding. In the opinion of management, the potential exposure of other recourse obligations related to the Company’s retail installment contract sales agreements will not have a material adverse effect on the Company’s consolidated financial position, results of operations, or cash flows.
	The Company has a letter of credit facility with Santander — New York Branch totaling $500,000 at June 30, 2014 and December 31, 2013. The amount issued was zero as of June 30, 2014 and December 31, 2013. The letters of credit can serve as collateral for certain warehouse lines. These commitments will expire on December 31, 2014.
	Santander has provided guarantees on the covenants, agreements, and obligations of the Company under the governing documents of its warehouse facilities and privately issued amortizing notes. These guarantees are limited to the obligations of SCUSA as servicer.
	The Company committed to purchase certain new advances of unsecured revolving financings originated by a third party retailer, along with existing balances on accounts with new advances, for an initial term ending on April 2020 and renewing through April 2022 at the retailer's option. The Company also is required to make a profit-sharing payment to the retailer each month.
	Under terms of the agreement with Chrysler, the Company must make revenue sharing payments to Chrysler and also must make loss-sharing payments when residual losses on leased vehicles exceed a specified threshold.
	Under terms of an application transfer agreement with another original equipment manufacturer (OEM), the Company has the first opportunity to review for its own portfolio any credit applications turned down by the OEM's captive finance company. The agreement does not require the Company to originate any loans, but for each loan originated the Company will pay the OEM a referral fee, comprised of a volume bonus fee and a loss betterment bonus fee. The loss betterment bonus fee will be calculated annually and is based on the amount by which losses on loans originated under the agreement are lower than an established percentage threshold.
	The Company is obligated to make purchase price holdback payments to a third party originator of loans that it purchases on a periodic basis, when losses are lower than originally expected.
	The Company has a flow agreement with Bank of America whereby the Company is committed to sell up to $300,000 of eligible loans to the bank each month through May 2018. The Company retains servicing on all sold loans and will receive or pay a servicer performance payment if yields, net of credit losses, on the loans are higher or lower, respectively, than expected at origination.
	The Company has sold loans to Citizens Bank of Pennsylvania (CBP) in 2014 under terms of a flow agreement and predecessor sale agreements. The Company retains servicing on the sold loans and will owe CBP a loss-sharing payment capped at 0.5% of the original pool balance if losses exceed a specified threshold, established on a pool-by-pool basis.
	The Company has an agreement with Santander Bank, N.A. (“SBNA,” formerly Sovereign Bank), a subsidiary of SHUSA, whereby the Company provides SBNA the first right to review and assess Chrysler dealer lending opportunities and, if SBNA elects, to provide the proposed financing. The Company provides servicing on all loans originated under this arrangement. The Company received a $9,000 referral fee in June 2013 in connection with this arrangement and is amortizing the fee into income over the ten-year term of agreement. The Company also will receive or pay a servicer performance payment if yields, net of credit losses, on the loans are higher or lower, respectively, than expected at origination. At the end of each quarter, the Company has the first right to originate loans in an amount equal to the amount of originations the Company made during the quarter due to SBNA decline or a failure to timely respond. Throughout the year, these amounts aggregate if the Company does not exercise its right of first refusal. At the end of each year, any amounts not used expire and do not roll over to the next year. As of June 30, 2014 and December 31, 2013, approximately $456,006 and $202,494 had been originated by SBNA under this agreement, and SCUSA had not exercised its right to originate additional loans.
	The Company also has agreements with SBNA to service recreational and marine vehicle portfolios. These agreements call for a periodic retroactive adjustment, based on cumulative return performance, of the servicing fee rate to inception of the contract. The adjustment for the three months ended June 30, 2014 and 2013 was an upward adjustment of $1,329 and zero, respectively, and adjustments for the six months ended June 30, 2014 and 2013 totaled a net upward adjustment of $3,249 and zero, respectively.
	The Company also provides SBNA with the first right to review and approve consumer vehicle lease applications. As of June 30, 2014, the Company has indemnified SBNA for potential credit and residual losses on $48,226 of leases that had been originated by SBNA under this program but were subsequently determined not to meet SBNA’s underwriting requirements. This indemnification agreement is supported by an equal amount of cash collateral posted by the Company in an SBNA bank account. The collateral account balance is included in restricted cash in the Company's condensed consolidated balance sheet.
	Under terms of agreements with a peer-to-peer unsecured lending platform company, the Company has committed to purchase at least the lesser of $30,000 per month or 75% of the lending platform company’s near-prime originations through July 2015, and the lesser of $30,000 per month or 50% of the lending platform company’s near-prime originations thereafter through July 2017. This commitment can be reduced or canceled with 90 days’ notice.
	Periodically, the Company is party to or otherwise involved in other legal proceedings arising in the normal course of business. The Company does not believe that there are any proceedings threatened or pending, if determined adversely, that would have a material adverse effect on the consolidated financial position, results of operations, or liquidity of the Company.

RelatedParty_Transactions

Related-Party Transactions	6 Months Ended
	Jun. 30, 2014
Related Party Transactions [Abstract]	'
Related-Party Transactions	'
	Related-Party Transactions
	Related-party transactions not otherwise disclosed in these footnotes to the consolidated financial statements include the following:
	The Company has a line of credit agreement with Santander — New York Branch (Note 5). Interest expense on these lines of credit totaled $22,709 and $13,957 for the three months ended June 30, 2014 and 2013, respectively, and $47,583 and $20,451 for the six months ended June 30, 2014 and 2013, respectively. Accrued interest was $6,146 and $11,435 at June 30, 2014 and December 31, 2013, respectively.
	The Company has a line of credit agreement with SHUSA (Note 5). Interest expense on this line of credit totaled $1,299 and $1,662 for the three and six months ended June 30, 2014, respectively. Accrued interest was $213 as of June 30, 2014.
	The Company has a letter of credit facility with Santander — New York Branch (Note 10). Letter of credit fees for the used and unused portions, which are included as a component of interest expense, totaled $126 and $144 for the three months ended June 30, 2014 and 2013, and $251 and $270 for the six months ended June 30, 2014 and 2013, respectively. Accrued fees totaled $126 and $128 at June 30, 2014 and December 31, 2013, respectively.
	The Company has derivative financial instruments with Santander and affiliates with outstanding notional amounts of $14,619,274 and $10,461,378 at June 30, 2014 and December 31, 2013, respectively (Note 7). Interest expense on these agreements includes amounts totaling $12,702 and $1,289 for the three months ended June 30, 2014 and 2013, respectively, and $21,583 and $6,163 for the six months ended June 30, 2014 and 2013, respectively.
	During 2013, the Company sold approximately $222,384 of the Company’s receivables from dealers to SBNA. The Company continues to service these loans but the loans are not subject to the servicer performance payment that applies to dealer loans originated under the SBNA flow agreement, described in Note 10. Servicing fee income recognized on receivables from dealers sold to SBNA or originated by SBNA totaled $3,033 and $4,298 for the three and six months ended June 30, 2014, including $1,259 and $1,723, respectively, in servicer performance payments. Other information on the dealer loan portfolio serviced for SBNA as of June 30, 2014 and December 31, 2013 is as follows:
		June 30,		December 31,
		2014		2013
	Total serviced portfolio	$	764,869	$	513,684
	Cash collections due to owner, net	$	10,930	$	6,941
	Servicing fees receivable	$	1,676	$	817
	The Company also has agreements with SBNA to service auto retail installment contracts and recreational and marine vehicle portfolios. Servicing fee income recognized under these agreements totaled $5,784 and $3,157 for the three months ended June 30, 2014 and 2013, respectively, and $6,649 and $9,371 for the six months ended June 30, 2014 and 2013, respectively. Other information on the serviced auto loan and retail installment contract portfolios for SBNA as of June 30, 2014 and December 31, 2013 is as follows:
		June 30,		December 31,
		2014		2013
	Total serviced portfolio	$	1,017,002	$	1,175,566
	Cash collections due to owner	$	30,522	$	32,831
	Servicing fees receivable (refundable)	$	2,566	$	(3,163	)
	During 2014, the Company entered into a flow agreement with SBNA whereby SBNA has the first right to review and approve Chrysler Capital consumer vehicle lease applications. SCUSA may review any applications declined by SBNA for the Company’s own portfolio. The Company provides servicing and receives an origination fee on all leases originated under this agreement.
	On June 27, 2014, the Company executed a bulk sale of Chrysler Capital leases with a depreciated net capitalized cost of $369,114 and a net book value of $317,275 in Chrysler Capital leases to SBNA. This sale was effected through the transfer of a SUBI in SCUSA’s titling trust. Proceeds from the sale were $322,851, for a total gain of $5,576.  SCUSA retained servicing on the sold leases.
	Origination and service fee income recognized on leases originated and serviced for SBNA totaled $6,937 and $535, respectively, for the three months ended June 30, 2014, and $10,622 and $629, respectively, for the six months ended June 30, 2014. Other information on the consumer vehicle lease portfolio serviced for SBNA as of June 30, 2014 is as follows:
		June 30,
		2014
	Total serviced portfolio	$	1,077,111
	Cash collections due to owner	$	6,055
	Origination and servicing fees receivable	$	2,499
	On June 30, 2014, the Company entered into an indemnification agreement with SBNA whereby SCUSA indemnifies SBNA for any credit or residual losses on a pool of $48,226 in leases originated under the flow agreement. The covered leases are non-conforming units because they did not meet SBNA’s credit criteria at origination.  In connection with this agreement, SCUSA established a $48,226 collateral account with SBNA that will be released over time to SBNA, in the case of losses, and SCUSA, in the case of payments and sale proceeds.
	Produban Servicios Informaticos Generales S.L., a Santander affiliate, is under contract with the Company to provide professional services, telecommunications, and internal and/or external applications. Expenses incurred, which are included as a component of data processing, communications and other expenses, total$22 for each of the three-month periods ended June 30, 2014 and 2013, and $75 for each of the six-month periods ended June 30, 2014 and 2013.
	During the three and six months ended June 30, 2014, the Company originated $2,207 and $2,911, respectively, in unsecured revolving loans under terms entered into under a Master Services Agreement (MSA) with a company in which it has a cost method investment and holds a warrant to increase its ownership if certain vesting conditions are satisfied. The MSA enables SCUSA to review credit applications of retail store customers.
	The Company paid expenses totaling $97 and $478, respectively, for the three and six months ended June 30, 2013, on behalf of the former managing member of the investment partnerships described in Note 8. The former managing member is an investor in Auto Finance Holdings. The Company has paid no expenses on behalf of this former managing member in 2014.
	The Company paid certain expenses incurred by the Chairman and CEO in the operation of his private plane when used for SCUSA business within the contiguous 48 states of the United States. Under this practice, payment is based on a set flight time hourly rate, and the amount of our reimbursement is not subject to a maximum cap per fiscal year. For the three and six months ended June 30, 2014, the Company paid $141 and $414, respectively to Meregrass Company, Inc., a 135 charter company that manages this operation, for flight time with an average hourly rate of $5.8 per hour.
	On October 21, 2013, we entered into a lease for approximately 373,000 square feet at a property intended to serve as our corporate headquarters, and in which property that the Chairman and CEO, President and Chief Financial Officer, and a member of our Board of Directors who is also a Santander employee each have a minority equity investment. For the three and six months ended June 30, 2014, the Company paid $54 and $108, respectively for monthly base rent. Future minimum lease payments for the 12-year term of the lease total approximately $83,555.

Computation_of_Basic_and_Dilut

Computation of Basic and Diluted Earnings per Common Share	6 Months Ended
	Jun. 30, 2014
Earnings Per Share [Abstract]	'
Computation of Basic and Diluted Earnings per Common Share	'
	Computation of Basic and Diluted Earnings per Common Share
	Earnings per common share is computed using the two-class method required for participating securities. Restricted stock awards are considered to be participating securities because holders of such shares have non-forfeitable dividend rights in the event of a declaration of a dividend on the Company’s common shares.
	We have excluded 1,539,861 and 1,308,177 employee stock option awards from the calculation of earnings per share for the three and six months ended June 30, 2014, respectively, as the effect would be anti-dilutive.
		Three Months Ended				Six Months Ended
		June 30,				June 30,
		2014		2013		2014		2013
	Earnings per common share
	Net income attributable to SCUSA	$	246,481	$	181,918	$	327,947	$	472,320
	Weighted average number of common shares outstanding before restricted participating shares (in thousands)	348,243		346,171		347,882		346,168
	Weighted average number of participating restricted common shares outstanding (in thousands)	584		—		584		—
	Weighted average number of common shares outstanding (in thousands)	348,827		346,171		348,466		346,168
	Earnings per common share	$	0.71	$	0.53	$	0.94	$	1.36
	Earnings per common share - assuming dilution
	Net income attributable to SCUSA	$	246,481	$	181,918	$	327,947	$	472,320
	Weighted average number of common shares outstanding (in thousands)	348,827		346,171		348,466		346,168
	Effect of employee stock-based awards (in thousands)	7,555		—		7,543		—
	Weighted average number of common shares outstanding - assuming dilution (in thousands)	356,382		346,171		356,008		346,168
	Earnings per common share - assuming dilution	$	0.69	$	0.53	$	0.92	$	1.36

Fair_Value_of_Financial_Instru

Fair Value of Financial Instruments	6 Months Ended
	Jun. 30, 2014
Fair Value Disclosures [Abstract]	'
Fair Value of Financial Instruments	'
	Fair Value of Financial Instruments
	Fair value estimates, methods, and assumptions are as follows:
		June 30, 2014				December 31, 2013
		Carrying		Estimated		Carrying		Estimated
		Value		Fair Value		Value		Fair Value
	Cash and cash equivalents (a)	$	45,913	$	45,913	$	10,531	$	10,531
	Receivables held for sale (b)	123,791		124,120		82,503		83,344
	Retail installment contracts held for investment, net (c)	21,444,601		21,961,413		20,219,609		21,465,236
	Unsecured consumer loans, net (d)	1,233,637		1,321,051		954,189		1,187,286
	Receivables from dealers held for investment (e)	85,194		85,194		94,745		94,745
	Restricted cash (a)	2,007,946		2,007,946		1,563,613		1,563,613
	Notes payable — credit facilities (f)	7,762,950		7,762,950		8,099,773		8,099,773
	Notes payable — secured structured financings (g)	18,391,660		18,544,914		15,195,887		15,565,013
	(a)	Cash and cash equivalents and restricted cash — The carrying amount of cash and cash equivalents, including restricted cash, approximated fair value at June 30, 2014 and December 31, 2013, due to the short maturity of these instruments and is considered a Level 1 measurement.
	(b)	Receivables held for sale — Receivables held for sale are carried at the lower of cost or market, as determined on an aggregate basis. The estimated fair value is based on the prices obtained or expected to be obtained in the subsequent sales and is considered a Level 2 measurement.
	(c)	Retail installment contracts held for investment — Retail installment contracts held for investment are carried at amortized cost, net of loan loss allowance. The estimated fair value is calculated based on estimated market rates for similar contracts with similar credit risks and is considered a Level 3 measurement.
	(d)	Unsecured consumer loans, net — Unsecured consumer loans are carried at amortized cost, net of loan loss allowance. Carrying value approximates fair value for unsecured revolving loans because the loans are short term in duration, do not have a defined maturity date and/or are at a market-based interest rate. For unsecured amortizing loans, the estimated fair value is calculated based on estimated market rates for similar loans with similar credit risks and is considered a level 3 measurement.
	(e)	Receivables from dealers, held for investment, net — Receivables from dealers held for investment are carried at amortized cost, net of loan loss allowance. The estimated fair value is calculated based on estimated market rates for similar receivables with similar credit risks and is considered a Level 3 measurement.
	(f)	Notes payable — credit facilities — The carrying amount of notes payable related to revolving credit facilities is estimated to approximate fair value as of June 30, 2014 and December 31, 2013. Management believes that the terms of these credit agreements approximate market terms for similar credit agreements. The fair value of notes payable is considered a Level 3 measurement.
	(g)	Notes payable — secured structured financings — The estimated fair value of notes payable related to secured structured financings is calculated based on market quotes for the Company’s publicly traded debt and estimated market rates currently available from recent transactions involving similar debt with similar credit risks, and is considered a Level 2 measurement.
	The following table presents the Company’s assets and liabilities that are measured at fair value on a recurring basis at June 30, 2014 and December 31, 2013, and are categorized using the fair value hierarchy. The fair value hierarchy includes three levels based on the reliability of the inputs used to determine the fair value:
		Fair Value Measurements at June 30, 2014
		Total		Quoted Prices		Significant		Significant
				in Active		Other		Unobservable
				Markets for		Observable		Inputs
				Identical Assets		Inputs		(Level 3)
				(Level 1)		(Level 2)
	Assets — trading interest rate caps (a)	$	46,631	$	—	$	46,631	$	—
	Assets — cash flow hedging interest rate swaps (a)	$	537	$	—	$	537	$	—
	Assets — trading interest rate swaps (a)	$	—	$	—	$	—	$	—
	Liabilities — trading options for interest rate	$	46,677	$	—	$	46,677	$	—
	caps (a)
	Liabilities — cash flow hedging interest rate	$	8,129	$	—	$	8,129	$	—
	swaps (a)
	Liabilities — trading interest rate swaps (a)	$	23,041	$	—	$	23,041	$	—
	Total return swap (b)	$	—	$	—	$	—	$	—
		Fair Value Measurements at December 31, 2013
		Total		Quoted Prices		Significant		Significant
				in Active		Other		Unobservable
				Markets for		Observable		Inputs
				Identical Assets		Inputs		(Level 3)
				(Level 1)		(Level 2)
	Assets — trading interest rate caps (a)	$	28,274	$	—	$	28,274	$	—
	Assets — cash flow hedging interest rate swaps (a)	$	1,601	$	—	$	1,601	$	—
	Liabilities — trading options for interest rate	$	28,389	$	—	$	28,389	$	—
	caps (a)
	Liabilities — cash flow hedging interest rate	$	7,287	$	—	$	7,287	$	—
	swaps (a)
	Liabilities — trading interest rate swaps (a)	$	31,360	$	—	$	31,360	$	—
	(a)	The valuation of swaps and caps is determined using widely accepted valuation techniques including discounted cash flow analysis on the expected cash flows of each derivative. This analysis reflects the contractual terms of the derivative, including the period to maturity, and uses observable market-based inputs. The Company incorporates credit valuation adjustments to appropriately reflect both its own nonperformance risk and the respective counterparty’s nonperformance risk in the fair value measurement of its derivatives. In adjusting the fair value of its derivative contracts for the effect of nonperformance risk, the Company has considered the impact of netting and any applicable credit enhancements, such as collateral postings and guarantees. The Company utilizes the exception in ASC 820-10-35-18D (commonly referred to as the “portfolio exception”) with respect to measuring counterparty credit risk for instruments (Note 7).
	(b)	The total return swap is valued based on the estimated market value of the underlying bonds pledged to the associated credit facility.
	No amounts were transferred in or out of Level 3 during 2014 or 2013.
	The following table presents the Company’s assets and liabilities that are measured at fair value on a nonrecurring basis at June 30, 2014 and December 31, 2013, and are categorized using the fair value hierarchy:
		Fair Value Measurements at June 30, 2014
		Total		Quoted Prices		Significant		Significant
				in Active		Other		Unobservable
				Markets for		Observable		Inputs
				Identical Assets		Inputs		(Level 3)
				(Level 1)		(Level 2)
	Assets — repossessed vehicle inventory	$	140,792	$	—	$	140,792	$	—
		Fair Value Measurements at December 31, 2013
		Total		Quoted Prices		Significant		Significant
				in Active		Other		Unobservable
Markets for				Observable		Inputs
Identical Assets				Inputs		(Level 3)
(Level 1)				(Level 2)
Assets — repossessed vehicle inventory	$	129,323	$	—	$	129,323	$	—
The Company estimates the fair value of its repossessed vehicle inventory using historical auction rates and current market levels of used car prices.

Employee_Benefit_Plans

Employee Benefit Plans	6 Months Ended
	Jun. 30, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]	'
Employee Benefit Plans	'
	Employee Benefit Plans
	SCUSA Compensation Plan — Beginning in 2012, the Company granted stock options to certain executives, other employees, and independent directors under a Management Equity Plan (the “Plan”). The Plan is administered by the Board of Directors and enables the Company to make stock awards up to a total of approximately 29 million common shares (net of shares canceled and forfeited), or 8.5% of the equity invested in the Company as of December 31, 2011.
	Stock options granted have an exercise price based on the estimated fair market value of the Company’s common stock on the grant date. The stock options expire after ten years and include both time vesting options and performance vesting options. The fair value of the stock options is amortized into income over the vesting period as time and performance vesting conditions are met. Under the Management Shareholder Agreements entered into by certain employees, no shares obtained through exercise of stock options could be transferred until the later of December 31, 2016, and the Company’s execution of an IPO (the later date of which is referred to as the Lapse Date). Until the Lapse Date, if an employee were to leave the Company, the Company would have the right to repurchase any or all of the stock obtained by the employee through option exercise. If the employee were terminated for cause (as defined in the Plan) or voluntarily left the Company without good reason (as defined in the Plan), in each case, prior to the Lapse Date the repurchase price would be the lower of the strike price or fair market value at the date of repurchase. If the employee were terminated without cause or voluntarily left the Company with good reason, in each case, prior to the Lapse Date the repurchase price is the fair market value at the date of repurchase. Management believes the Company’s repurchase right caused the IPO event to constitute an implicit vesting condition and therefore did not record any stock compensation expense until the date of the IPO, January 23, 2014.
	On December 28, 2013, the Board approved certain changes to the Plan and the Management Shareholders Agreement, including acceleration of vesting for certain employees, removal of transfer restrictions for shares underlying a portion of the options outstanding under the Plan, and addition of transfer restrictions for shares underlying another portion of the outstanding options. All of the changes were contingent on, and effective upon, the Company’s execution of an IPO and, as such, became effective upon pricing of the IPO on January 22, 2014. Also on December 28, 2013, the Board established the Omnibus Incentive Plan, which enables the Company to grant awards of nonqualified and incentive stock options, stock appreciation rights, restricted stock awards, restricted stock units and other awards that may be settled in or based upon the value of the Company’s common stock up to a total of 5,192,640 common shares. As of June 30, 2014, the Company had granted 583,890 shares of restricted stock to certain executives under terms of the Omnibus Incentive Plan. Compensation expense related to this restricted stock is recognized over a five-year vesting period, with $1,216 recorded for the six months ended June 30, 2014.
	On January 23, 2014, the Company executed an IPO, in which selling stockholders offered and sold to the public 85,242,042 shares of common stock at a price of $24.00 per share. The Company received no proceeds from the initial public offering. Stock-based compensation expense totaling $117,770 related to vested options was recognized upon the IPO, including expense related to accelerated vesting for certain executives of $33,845. Also in connection with the IPO, the Company granted additional stock options under the Plan to certain executives, other employees, and an independent director with an estimated fair value of $10,216, which will be recognized over the awards' vesting period of five years for the employees and three years for the director. Additional stock option grants have been made during the six months ended June 30, 2014 to employees and another independent director; the expense associated with these additional grants is immaterial.
	A summary of the Company’s stock options and related activity as of and for the six months ended June 30, 2014 is as follows:
		Shares		Weighted			Weighted	Aggregate
				Average			Average	Intrinsic
				Exercise			Remaining	Value
				Price			Contractual
							Term (Years)
		(in whole dollars)
	Options outstanding at January 1, 2014	23,910,062		$	9.81		8
	Granted	1,539,861		23.94
	Exercised	(2,977,250	)	9.55				(43,836	)
	Expired	—		—
	Forfeited	(722,634	)	(12.36		)
	Options outstanding at June 30, 2014	21,750,039		10.76			7.7	188,766
	Options exercisable at June 30, 2014	15,620,920		9.87			7.5	149,421

Shareholders_Equity

Shareholders' Equity	6 Months Ended
	Jun. 30, 2014
Equity [Abstract]	'
Shareholders' Equity	'
	Treasury Stock
	The Company has 3,154 shares of treasury stock outstanding as of June 30, 2014 and December 31, 2013. Prior to the IPO on January 23, 2014, the Company repurchased the shares as a result of an employee leaving the company. The value of the treasury stock is immaterial and included within additional paid-in-capital.
	Accumulated Other Comprehensive Loss
	A summary of changes in accumulated other comprehensive loss, net of tax, for the six months ended June 30, 2014 and 2013 is as follows:
		Three Months Ended June 30, 2014										Three Months Ended June 30, 2013
		Unrealized gains (losses) on cash flow hedges (a)			Unrealized gains (losses) on investments available for sale (a)			Total				Unrealized gains (losses) on cash flow hedges (a)			Unrealized gains (losses) on investments available for sale (a)			Total
	Beginning balance	$	(765	)	$	—		$	(765	)		$	(9,582	)	$	1,796		$	(7,786	)
	Other comprehensive income (loss) before	(4,579		)	—			(4,579		)		(804		)	(887		)	(1,691		)
	reclassifications
	Amounts reclassified out of accumulated	1,215			—			1,215				2,804			(279		)	2,525
	other comprehensive income (loss) (b)
	Ending balance	$	(4,129	)	$	—		$	(4,129	)		$	(7,582	)	$	630		$	(6,952	)
	(a) Amounts in this table are net of tax
	(b) Amounts reclassified out of accumulated other comprehensive income (loss) consist of the following:
					Three Months Ended June 30, 2014					Three Months Ended June 30, 2013
	Reclassification				Amount reclassified			Income statement line item		Amount reclassified				Income statement line item
	Cash flow hedges:
	Settlements of derivatives				$	1,931		Interest expense		$	4,444			Interest expense
	Tax expense (benefit)				(716		)			(1,640		)
	Net of tax				$	1,215				$	2,804
	Investments available for sale:
	Discount accretion				$	—				$	(443	)		Interest expense
	Tax expense (benefit)				—					164
	Net of tax				$	—				$	(279	)
		Six Months Ended June 30, 2014										Six Months Ended June 30, 2013
		Unrealized gains (losses) on cash flow hedges (a)			Unrealized gains (losses) on investments available for sale (a)			Total				Unrealized gains (losses) on cash flow hedges (a)			Unrealized gains (losses) on investments available for sale (a)			Total
	Beginning balance	$	(2,853	)	$	—		$	(2,853	)		$	(12,416	)	$	3,252		$	(9,164	)
	Other comprehensive income (loss) before	(4,167		)	—			(4,167		)		(1,123		)	(2,022		)	(3,145		)
	reclassifications
	Amounts reclassified out of accumulated	2,891			—			2,891				5,957			(600		)	5,357
	other comprehensive income (loss) (b)
	Ending balance	$	(4,129	)	$	—		$	(4,129	)		$	(7,582	)	$	630		$	(6,952	)
	(a) Amounts in this table are net of tax
	(b) Amounts reclassified out of accumulated other comprehensive income (loss) consist of the following:
					Six Months Ended June 30, 2014					Six Months Ended June 30, 2013
	Reclassification				Amount reclassified			Income statement line item		Amount reclassified				Income statement line item
	Cash flow hedges:
	Settlements of derivatives				$	4,595		Interest expense		$	9,439			Interest expense
	Tax expense (benefit)				(1,704		)			(3,482		)
	Net of tax				$	2,891				$	5,957
	Investments available for sale:
	Discount accretion				$	—				$	(951	)		Interest expense
	Tax expense (benefit)				—					351
	Net of tax				$	—				$	(600	)

Description_of_Business_Basis_1

Description of Business, Basis of Presentation, and Changes in Significant Accounting Policies and Practices (Policies)	6 Months Ended
	Jun. 30, 2014
Organization, Consolidation and Presentation of Financial Statements [Abstract]	'
Basis of Presentation	'
	Basis of Presentation
	The accompanying condensed consolidated financial statements include the accounts of the Company and its subsidiaries, including certain special purpose financing trusts utilized in financing transactions (“Trusts”), which are considered variable interest entities (“VIEs”). The Company consolidates other VIEs for which it was deemed the primary beneficiary. All intercompany balances and transactions have been eliminated in consolidation.
	The accompanying condensed consolidated financial statements as of June 30, 2014 and December 31, 2013, and for the three and six months ended June 30, 2014 and 2013, have been prepared in accordance with United States generally accepted accounting principles (U.S. GAAP) for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by generally accepted accounting principles for complete financial statements. In the opinion of management, these financial statements contain all adjustments, consisting of normal recurring accruals, necessary to present fairly the financial position, results of operations and cash flows for the periods indicated. Results of operations for the periods presented herein are not necessarily indicative of results of operations for the entire year. These financial statements should be read in conjunction with the Company’s Annual Report on Form 10-K for the year ended December 31, 2013.
	The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions which affect the reported amounts of assets and liabilities and the disclosures of contingent assets and liabilities as of the date of the financial statements and the amount of revenue and expenses during the reporting periods. Actual results could differ from those estimates and those differences may be material. These estimates include the determination of loan loss allowance, discount accretion, impairment, expected end-of-term lease residual values, values of repossessed assets, and income taxes. These estimates, although based on actual historical trends and modeling, may potentially show significant variances over time.
Business Segment Information	'
	Business Segment Information
	The Company has one reportable segment: Consumer Finance, which includes the Company’s vehicle financial products and services, including retail installment contracts, vehicle leases, and dealer loans, as well as financial products and services related to motorcycles, RVs, and watercraft. It also includes the Company’s unsecured personal loan and point-of-sale financing operations.
Recent Accounting Pronouncements	'
	Recently Adopted Accounting Standards
	In July 2013, the FASB issued ASU 2013-11, Income Taxes: Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists. This ASU provides guidance on the presentation of unrecognized tax benefits, particularly the manner in which an entity would settle, at the reporting date, any additional income taxes that would result from the disallowance of a tax position when net operating loss carryforwards, similar tax losses, or tax credit carryforwards exist. This guidance became effective for the Company January 1, 2014 and implementation did not have a significant impact on the Company’s financial position, results of operations, or cash flows.
	Recent Accounting Pronouncements
	In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers, which provides guidance on a single comprehensive model for entities to use in accounting for revenue arising from contracts with customers. This guidance is effective beginning after December 15, 2016. The Company does not expect the adoption to have a material impact to the consolidated financial statements as loan and lease contracts are excluded.
	In June 2014, the FASB issued ASU 2014-11, Repurchase-to-Maturity Transactions, Repurchase Financings, and Disclosures. The standard requires entities to account for repurchase-to-maturity transactions as secured borrowings, eliminates accounting guidance on linked repurchase financing transactions, and expands disclosure requirements related to certain transfers of financial assets that are accounted for as secured borrowings. This guidance is effective for the Company beginning January 1, 2015 and early adoption is not permitted. The Company is currently evaluating the impact of the adoption on its consolidated financial statements.
	In June 2014, the FASB issued ASU 2014-12, Accounting for Share-Based Payments When the Terms of an Award That a Performance Target Could be Achieved after the Requisite Service Period. This standard affects entities that issue share-based payments when the terms of an award stipulate that a performance target could be achieved after an employee completes the requisite service period. This guidance is effective for fiscal years beginning after December 15, 2015 and early adoption is permitted. The Company is currently evaluating the impact of the adoption on its consolidated financial statements.

Finance_Receivables_Tables

Finance Receivables (Tables)	6 Months Ended
	Jun. 30, 2014
Receivables [Abstract]	'
Summary of Finance Receivables Held for Investment	'
	Finance receivables held for investment at June 30, 2014 and December 31, 2013, were comprised as follows:
		June 30, 2014
		Retail Installment Contracts Held for Investment
		Loans			Purchased			Total			Receivables from			Unsecured
		Acquired			Receivables						Dealers Held			Consumer
		Individually			Portfolios						for Investment			Loans
	Unpaid principal balance	$	23,675,889		$	1,272,807		$	24,948,696		$	85,885		$	1,448,709
	Loan loss allowance (Note 3)	(2,668,587		)	(197,844		)	(2,866,431		)	(923		)	(212,954		)
	Discount	(659,154		)	(13,679		)	(672,833		)	—			(3,067		)
	Capitalized origination costs and fees	35,169			—			35,169			232			949
	Net carrying balance	$	20,383,317		$	1,061,284		$	21,444,601		$	85,194		$	1,233,637
		December 31, 2013
		Retail Installment Contracts Held for Investment
		Loans			Purchased			Total			Receivables from			Unsecured
		Acquired			Receivables						Dealers Held			Consumer
		Individually			Portfolios						for Investment			Loans
	Unpaid principal balance	$	21,238,281		$	1,961,060		$	23,199,341		$	95,835		$	1,165,778
	Loan loss allowance (Note 3)	(2,132,634		)	(226,356		)	(2,358,990		)	(1,090		)	(179,350		)
	Discount	(573,462		)	(81,216		)	(654,678		)	—			(32,831		)
	Capitalized origination costs and fees	33,936			—			33,936			—			592
	Net carrying balance	$	18,566,121		$	1,653,488		$	20,219,609		$	94,745		$	954,189
Changes in Accretable Yield on Purchased Receivables Portfolios	'
	Changes in accretable yield on the Company’s purchased receivables portfolios for the periods indicated were as follows:
		For the Three Months Ended						For the Six Months Ended
		June 30, 2014			June 30, 2013			June 30, 2014			June 30, 2013
	Balance — beginning of period	$	362,823		$	743,348		$	403,400		$	816,854
	Accretion of accretable yield	(52,519		)	(112,513		)	(117,565		)	(247,712		)
	Reclassifications from (to) nonaccretable difference	(5,050		)	(95,179		)	19,419			(33,486		)
	Balance — end of period	$	305,254		$	535,656		$	305,254		$	535,656

Loan_Loss_Allowance_and_Credit1

Loan Loss Allowance and Credit Quality (Tables)	6 Months Ended
	Jun. 30, 2014
Loans and Leases Receivable, Allowance [Abstract]	'
Summary of Activity in Loan Loss Allowance	'
		Six Months Ended June 30, 2014												Six Months Ended June 30, 2013
		Retail Installment				Receivables				Unsecured				Retail Installment			Receivables		Unsecured
		Contracts				from Dealers Held				Consumer Loans				Contracts			from Dealers Held		Consumer Loans
		Acquired				for Investment								Acquired			for Investment
		Individually												Individually
	Balance — beginning of period	$	2,132,634			$	1,090			$	179,350			$	1,555,362		$	—	$	—
	Provision for loan losses	1,184,068				(167		)		132,341				626,922			1,490		39,256
	Charge-offs	(1,453,530		)		—				(107,914		)		(754,121		)			(6		)
	Recoveries	805,415				—				9,177				436,150			—		—
	Balance — end of period	$2,668,587				$	923			$	212,954			$	1,864,313		$	1,490	$	39,250
	The activity in the loan loss allowance for individually acquired loans for the three and six months ended June 30, 2014 and 2013 was as follows:
		Three Months Ended June 30, 2014												Three Months Ended June 30, 2013
		Retail Installment				Receivables				Unsecured				Retail Installment			Receivables		Unsecured
		Contracts				from Dealers Held				Consumer Loans				Contracts			from Dealers Held		Consumer Loans
		Acquired				for Investment								Acquired			for Investment
		Individually												Individually
	Balance — beginning of period	$	2,444,552			$	1,035			$	203,190			$	1,660,612		$	—	$	—
	Provision for loan losses	527,362				(112		)		70,212				375,281			1,490		39,256
	Charge-offs	(700,965		)		—				(66,966		)		(369,395		)	—		(6		)
	Recoveries	397,638				—				6,518				197,815			—		—
	Balance — end of period	$	2,668,587			$	923			$	212,954			$	1,864,313		$	1,490	$	39,250
Summary of Activity in Loan Loss Allowance Related to Purchased Receivables Portfolios	'
	The activity in the impairment reserves related to purchased receivables portfolios for the three and six months ended June 30, 2014 and 2013 was as follows:
		Three Months Ended								Six Months Ended
		June 30,								June 30,
		2014				2013				2014				2013
	Balance — beginning of period	$	206,170			$	184,192			$	226,356			$	218,640
	Incremental provisions for purchased receivable portfolios	350				18,314				1,675				39,976
	Incremental reversal of provisions for purchased receivable portfolios	(8,676		)		(25,930		)		(30,187		)		(82,040		)
	Balance — end of period	$	197,844			$	176,576			$	197,844			$	176,576
Summary of Delinquencies	'
	June 30, 2014 and December 31, 2013 is as follows:
		June 30, 2014
		Retail Installment Contracts Held for Investment												Receivables			Unsecured
														from Dealers Held			Consumer
		Loans				Purchased				Total				for Investment			Loans
		Acquired				Receivables
		Individually				Portfolios
	Principal, current	$	21,047,173			$	981,616			$	22,028,789			$	85,885		$	1,283,884
	Principal, 31-60 days past due	1,829,261				194,069				2,023,330				—			45,382
	Delinquent principal over 60 days	799,455				97,122				896,577				—			119,443
	Total principal	$	23,675,889			$	1,272,807			$	24,948,696			$	85,885		$	1,448,709
		December 31, 2013
		Retail Installment Contracts Held for Investment												Receivables			Unsecured
														from Dealers Held			Consumer
		Loans				Purchased				Total				for Investment			Loans
		Acquired				Receivables
		Individually				Portfolios
	Principal, current	$	18,653,827			$	1,457,813			$	20,111,640			$	95,835		$	1,072,316
	Principal, 31-60 days past due	1,729,139				321,549				2,050,688				—			28,102
	Delinquent principal over 60 days	855,315				181,698				1,037,013				—			65,360
	Total principal	$	21,238,281			$	1,961,060			$	23,199,341			$	95,835		$	1,165,778
Summary of Credit Risk Profile	'
	A summary of the credit risk profile of the Company’s consumer loans by FICO® distribution, determined at origination, as of June 30, 2014 and December 31, 2013 was as follows:
	June 30, 2014
			Retail Installment		Unsecured
			Contracts Held		Consumer
	FICO Band		for Investment		Loans
	<540		26.70%		10.00%
	540-599		32.30%		21.30%
	600-659		26.50%		40.90%
	>660		14.50%		27.80%
	December 31, 2013
			Retail Installment		Unsecured
			Contracts Held		Consumer
	FICO Band		for Investment		Loans
	<540		26.80%		6.30%
	540-599		31.80%		24.20%
	600-659		26.30%		39.40%
	>660		15.10%		30.10%
Summary Commercial Loan Credit Quality Indicators for Receivables from Dealers Held for Investment	'
	Commercial loan credit quality indicators for receivables from dealers held for investment as of June 30, 2014 and December 31, 2013 were as follows:
		June 30,				December 31,
		2014				2013
	Pass	$	83,754			$	95,835
	Special Mention	2,131				—
	Substandard	—				—
	Doubtful	—				—
	Loss	—				—
		$	85,885			$	95,835
Summary of Company's TDRs	'
	The table below presents the Company’s loans modified in TDRs as of June 30, 2014 and December 31, 2013:
		June 30, 2014								December 31, 2013
		Retail Installment Contracts				Unsecured Consumer Loans				Retail Installment Contracts				Unsecured Consumer Loans
	Total TDR principal	$	3,151,614			$	19,540			$	2,604,351			$	8,391
	Accrued interest	85,218				—				70,965				—
	Discount	(87,743		)		(58		)		(70,321		)		(274		)
	Origination costs	4,682				18				4,161				5
	Outstanding recorded investment	3,153,771				19,500				2,609,156				8,122
	Allowance for loan losses	(551,767		)		(6,040		)		(475,128		)		(2,345		)
	Outstanding recorded investment, net of allowance	$	2,602,004			$	13,460			$	2,134,028			$	5,777
Summary of Performing and Nonperforming TDRs	'
	A summary of the Company’s performing and non-performing TDRs at June 30, 2014 and December 31, 2013, is as follows:
		June 30, 2014								December 31, 2013
		Retail Installment Contracts				Unsecured Consumer Loans				Retail Installment Contracts				Unsecured Consumer Loans
	Current	$	2,171,354			$	13,008			$	1,690,893			$	6,120
	31-60 days past due	635,787				972				556,489				875
	Greater than 60 days past due (non-performing)	344,473				5,560				356,969				1,396
	Total TDRs	$	3,151,614			$	19,540			$	2,604,351			$	8,391
Average Recorded Investment and Income Recognized on TDR Loans	'
	Average recorded investment and income recognized on TDR loans are as follows:
		Three Months Ended															Six Months Ended
		June 30, 2014								June 30, 2013							June 30, 2014					June 30, 2013
		Retail Installment Contracts				Unsecured Consumer Loans				Retail Installment Contracts				Unsecured Consumer Loans			Retail Installment Contracts		Unsecured Consumer Loans			Retail Installment Contracts		Unsecured Consumer Loans
	Average outstanding recorded investment in TDRs	$	2,979,944			$	14,570			$	1,683,372			$	62		$	2,856,348	$	12,510		$	1,628,540	$	41
	Interest income recognized	$	112,138			$	391			$	38,260			$	1		$	232,589	$	720		$	130,401	$	1
Summary of Loan Modification Accounted as TDRs	'
	The following table summarizes the financial effects of loan modifications accounted for as TDRs that occurred during the three and six months ended June 30, 2014 and 2013:
		Three Months Ended
		June 30, 2014								June 30, 2013
		Retail Installment Contracts				Unsecured Consumer Loans				Retail Installment Contracts				Unsecured Consumer Loans
	Troubled Debt Restructurings:
	Outstanding recorded investment before TDR	$	743,664			$	4,637			$	473,775			$	150
	Outstanding recorded investment after TDR	$	699,158			$	4,573			$	444,971			$	149
	Number of contracts	44,524				4,116				29,797				143
		Six Months Ended
		June 30, 2014								June 30, 2013
		Retail Installment Contracts				Unsecured Consumer Loans				Retail Installment Contracts				Unsecured Consumer Loans
	Troubled Debt Restructurings:
	Outstanding recorded investment before TDR	$	1,367,673			$	6,748			$	764,636			$	150
	Outstanding recorded investment after TDR	$	1,280,211			$	6,667			$	733,812			$	149
	Number of contracts	83,753				6,135				50,271				143
Summary of Defaults in Loan Modifications Accounted as TDRs	'
	Loan modifications accounted for as TDRs within the previous 12 months that subsequently defaulted during the three and six months ended June 30, 2014 and 2013 are summarized in the following table:
		Three Months Ended
		June 30, 2014						June 30, 2013
		Retail Installment Contracts				Unsecured Consumer Loans		Retail Installment Contracts				Unsecured Consumer Loans
	Troubled debt restructurings that subsequently defaulted	$	70,811			(a)		$	24,471			$	—
	Number of contracts	7,234				(a)		2,609				—
		Six Months Ended
		June 30, 2014						June 30, 2013
		Retail Installment Contracts				Unsecured Consumer Loans		Retail Installment Contracts				Unsecured Consumer Loans
	Troubled debt restructurings that subsequently defaulted	$	120,275			(a)		$	38,491			$	—
	Number of contracts	13,123				(a)		4,234				—
	(a) Subsequent defaults on unsecured consumer loan TDRs were immaterial for the periods presented.

Leased_Vehicles_Net_Tables

Leased Vehicles, Net (Tables)	6 Months Ended
	Jun. 30, 2014
Summary of Leased Vehicles	'
	Leased vehicles consisted of the following as of June 30, 2014 and December 31, 2013:
		June 30,			December 31,
		2014			2013
	Leased vehicles	$	4,481,384		$	2,402,052
	Origination fees and other costs	1,157			2,716
	Manufacturer subvention payments	(495,597		)	(259,152		)
		3,986,944			2,145,616
	Less: accumulated depreciation	(419,398		)	(122,183		)
		$	3,567,546		$	2,023,433
SCUSA Delaware	'
Minimum Rental Payments Due to Lessor under Operating Leases	'
	The following summarizes the future minimum rental payments due to the Company as lessor under operating leases as of June 30, 2014:
	Remainder of 2014	$	318,976
	2015	616,414
	2016	472,417
	2017	90,436
	2018	96
	Thereafter	—
	Total	$	1,498,339

Debt_Tables

Debt (Tables)	6 Months Ended
	Jun. 30, 2014
Debt Disclosure [Abstract]	'
Schedule of Credit Facilities	'
	The following table presents information regarding credit facilities as of June 30, 2014 and December 31, 2013:
		June 30, 2014
		Maturity Date(s)	Utilized Balance		Committed Amount		Effective Rate	Assets Pledged		Restricted Cash Pledged
	Warehouse line (a)	Jul-14	$	109,461	$	500,000	2.05%	$	158,591	$	172
	Warehouse line	Various (b)	552,268		1,235,038		1.14%	816,330		25,768
	Warehouse line (c)	Jan-16	1,318,088		4,550,000		1.15%	1,756,086		35,685
	Warehouse line	Dec-15	464,037		2,000,000		2.18%	570,306		11,993
	Warehouse line	Jul-15	153,515		500,000		1.64%	191,391		7,532
	Warehouse line (d)	Sep-15	196,880		200,000		1.97%	290,043		12,054
	Repurchase facility (e)	Various	747,342		747,342		1.52%	844,305		—
	Warehouse line	Dec-15	495,765		750,000		0.91%	675,143		10,083
	Warehouse line (f)	Nov-16	175,000		175,000		1.71%	—		—
	Warehouse line (g)	Mar-15	250,594		250,594		0.99%	296,929		—
	Total facilities with third parties		4,462,950		10,907,974			5,599,124		103,287
	Lines of credit with Santander and related subsidiaries (h):
	Line of credit	Dec-16	500,000		500,000		2.45%	1,623		—
	Line of credit	Dec-18	—		500,000		0.25%	—		—
	Line of credit	Dec-16	1,750,000		1,750,000		2.26%	—		—
	Line of credit	Dec-18	750,000		1,750,000		2.59%	187,555		—
	Line of credit	Mar-17	300,000		300,000		1.70%	—		—
	Total facilities with Santander and related subsidiaries		3,300,000		4,800,000			189,178		—
	Total revolving credit facilities		$	7,762,950	$	15,707,974		$	5,788,302	$	103,287
		December 31, 2013
		Maturity Date(s)	Utilized Balance		Committed Amount		Effective Rate	Assets Pledged		Restricted Cash Pledged
	Warehouse line	Jun-14	$	483,738	$	500,000	0.82%	$	757,352	$	—
	Warehouse line	Various	159,300		1,219,474		3.62%	232,015		3,667
	Warehouse line	Apr-14	613,600		4,550,000		2.12%	745,759		15,184
	Warehouse line	Jun-15	1,360,070		2,000,000		0.96%	1,672,082		42,510
	Warehouse line	Jul-15	495,786		500,000		0.85%	598,754		25,056
	Warehouse line	Sep-15	73,080		200,000		2.84%	76,807		2,701
	Repurchase facility	Various	879,199		879,199		1.59%	—		—
	Warehouse line	Dec-15	210,000		750,000		1.84%	302,632		—
	Warehouse line	Nov-16	175,000		175,000		1.72%	—		—
	Total facilities with third parties		4,449,773		10,773,673			4,385,401		89,118
	Lines of credit with Santander and related subsidiaries:
	Line of credit	Dec-16	500,000		500,000		2.48%	10,674		—
	Line of credit	Dec-18	—		500,000		3.10%	—		—
	Line of credit	Dec-16	1,750,000		1,750,000		2.09%	—		—
	Line of credit	Dec-18	1,400,000		1,750,000		2.58%	93,969		—
	Total facilities with Santander and related subsidiaries		3,650,000		4,500,000			104,643		—
	Total revolving credit facilities		$	8,099,773	$	15,273,673		$	4,490,044	$	89,118
	(a)	In July 2014, the maturity date of this facility was extended to June 2015.
	(b)	Half of the outstanding balance on this facility matures in March 2015 and half in March 2016.
	(c)	This line is held exclusively for Chrysler Capital retail loan and lease financing, with lease financing comprising no more than 50% of the outstanding balance upon advance. In July 2014, the committed amount was reduced to $4.3 billion and the maturity date was extended to June 2016.
	(d)	This line is held exclusively for unsecured consumer term loans.
	(e)	The repurchase facility is also collateralized by securitization notes payable retained by the Company. No portion of this facility is unsecured. This facility has rolling 30-day and 90-day maturities.
	(f)	This line is collateralized by residuals retained by the Company.
	(g)	This line is collateralized by securitization notes payable retained by the Company.
	(h)	These lines are also collateralized by securitization notes payable and residuals retained by the Company. As of June 30, 2014 and December 31, 2013, $1,569,930 and $1,123,354, respectively, of the aggregate outstanding balances on these facilities were unsecured.
Summary of Secured Structured Financings	'
	The following table presents information regarding secured structured financings as of June 30, 2014 and December 31, 2013:
		June 30, 2014
		Original Estimated Maturity Date(s)	Balance		Initial Note Amounts Issued		Initial Weighted Average Interest Rate	Collateral		Restricted Cash
	2010 Securitizations	October 2016 - November 2017	$	333,148	$	3,671,749	1.04%-1.44%	$	641,669	$	142,992
	2011 Securitizations	October 2015 - September 2017	653,968		4,693,289		1.21%-2.80%	1,038,660		157,307
	2012 Securitizations	November 2017 - December 2018	3,088,855		8,023,840		0.92%-1.68%	3,899,764		355,658
	2013 Securitizations	January 2019 - January 2021	4,338,610		6,689,700		0.89%-1.59%	5,295,330		348,040
	2014 Securitizations	April 2020 - August 2020	3,706,441		4,100,000		1.63%-1.72%	4,385,840		236,269
	Public securitizations		12,121,022		27,178,578			15,261,263		1,240,266
	2010 Private issuances	Jun-11	209,128		516,000		1.29%	338,513		9,538
	2011 Private issuances	Dec-18	1,222,065		4,856,525		1.46%-1.80%	1,652,724		56,942
	2012 Private issuances	May-16	14,962		70,308		1.07%	20,177		1,874
	2013 Private issuances	September 2018 - September 2020	2,411,661		2,693,754		1.13%-1.38%	3,249,917		89,031
	2014 Private issuances	March 2018 - August 2021	2,412,822		2,680,379		1.09%-1.85%	2,965,196		112,116
	Privately issued amortizing notes		6,270,638		10,816,966			8,226,527		269,501
	Total secured structured financings		$	18,391,660	$	37,995,544		$	23,487,790	$	1,509,767
		December 31, 2013
		Original Estimated Maturity Date(s)	Balance		Initial Note Amounts Issued		Initial Weighted Average Interest Rate	Collateral		Restricted Cash
	2010 Securitizations	October 2016 - November 2017	$	632,251	$	4,671,749	1.04%-1.44%	$	1,143,435	$	205,190
	2011 Securitizations	October 2015 - September 2017	1,218,208		5,605,609		1.21%-2.80%	1,634,220		195,854
	2012 Securitizations	November 2017 - December 2018	4,061,127		8,023,840		0.92%-1.68%	5,013,135		383,677
	2013 Securitizations	January 2019 - January 2021	5,503,580		6,689,700		0.89%-1.59%	6,465,840		351,160
	Public securitizations		11,415,166		24,990,898			14,256,630		1,135,881
	2010 Private issuances	Jun-11	219,704		516,000		1.29%	378,434		8,435
	2011 Private issuances	Dec-18	662,138		4,856,525		1.46%-1.80%	908,304		36,449
	2012 Private issuances	May-16	30,526		70,308		1.07%	35,378		3,016
	2013 Private issuances	September 2018 - September 2020	2,868,353		2,693,754		1.13%-1.38%	3,554,569		97,100
	Privately issued amortizing notes		3,780,721		8,136,587			4,876,685		145,000
	Total secured structured financings		$	15,195,887	$	33,127,485		$	19,133,315	$	1,280,881

Variable_Interest_Entities_Tab

Variable Interest Entities (Tables)	6 Months Ended
	Jun. 30, 2014
Servicing Asset At Amortized Value Additional Disclosures [Abstract]	'
Summary of Assets and Liabilities Related to VIEs	'
	The following table summarizes the assets and liabilities related to VIEs included in the Company’s consolidated financial statements:
		June 30,		December 31,
		2014		2013
	Restricted cash	$	1,613,054	$	1,370,174
	Retail installment contracts, net	21,020,328		19,166,392
	Leased vehicles, net	3,567,546		2,023,433
	Various other assets	901,100		541,469
	Notes payable	26,297,908		23,810,950
	Various other liabilities	49,983		25,682
Summary of Cash Flows Received from On-Balance Sheet Securitization Trusts	'
	A summary of the cash flows received from securitization trusts during the three and six months ended June 30, 2014 and 2013, is as follows:
		Three Months Ended				Six Months Ended
		June 30, 2014		June 30, 2013		June 30, 2014		June 30, 2013
	Receivables securitized	$	5,051,048	$	1,317,633	$	9,141,478	$	4,121,367
	Net proceeds from securitizations (a)	$	4,707,336	$	1,136,460	$	8,206,756	$	3,586,460
	Cash received for servicing fees	157,698		107,848		306,257		209,436
	Cash received upon release from reserve and	60		2,806		810		6,225
	restricted cash accounts
	Net distributions from Trusts	384,093		431,723		710,812		759,290
	Total cash received from securitization trusts	$	5,249,187	$	1,678,837	$	9,224,635	$	4,561,411
	(a) Includes additional advances on existing securitizations

Derivative_Financial_Instrumen1

Derivative Financial Instruments (Tables)	6 Months Ended
	Jun. 30, 2014
Derivative Instruments and Hedging Activities Disclosure [Abstract]	'
Summary of Underlying Notional Amounts and Aggregate Fair Values	'
	The underlying notional amounts and aggregate fair values of these agreements at June 30, 2014 and December 31, 2013, were as follows:
		June 30, 2014						December 31, 2013
		Notional			Fair Value			Notional			Fair Value
	Interest rate swap agreements designated as cash flow hedges	$	6,057,000		$	(7,592	)	$	3,873,000		$	(5,686	)
	Interest rate swap agreements not designated as hedges	2,841,861			(23,041		)	3,444,459			(31,360		)
	Interest rate cap agreements	6,398,207			46,631			4,616,960			28,274
	Options for interest rate cap agreements	6,398,207			(46,677		)	4,616,960			(28,389		)
	Total return swap	250,594			—			—			—
Offsetting of Derivative Assets and Liabilities	'
	Information on the offsetting of derivative assets and derivative liabilities due to the right of offset was as follows, as of June 30, 2014 and December 31, 2013:
		Offsetting of Financial Assets
											Gross Amounts Not Offset in the
											Consolidated Balance Sheet
		Gross			Gross Amounts			Net Amounts of Assets Presented			Financial			Cash			Net
		Amounts of			Offset in the			in the			Instruments			Collateral			Amount
		Recognized			Consolidated			Consolidated						Received
		Assets			Balance Sheet			Balance Sheet
	June 30, 2014
	Interest rate swaps - Santander & affiliates	$	537		$	—		$	537		$	—		$	—		$	537
	Interest rate caps - Santander & affiliates	33,201			—			33,201			—			—			33,201
	Interest rate caps - third party	13,430			—			13,430			—			—			13,430
	Total derivatives subject to a master netting arrangement or similar arrangement	47,168			—			47,168			—			—			47,168
	Total derivatives not subject to a master netting arrangement or similar arrangement	—			—			—			—			—			—
	Total derivative assets	$	47,168		$	—		$	47,168		$	—		$	—		$	47,168
	Total financial assets	$	47,168		$	—		$	47,168		$	—		$	—		$	47,168
	December 31, 2013
	Interest rate swaps - Santander & affiliates	$	1,601		$	—		$	1,601		$	—		$	—		$	1,601
	Interest rate caps - Santander & affiliates	9,342			—			9,342			—			—			9,342
	Interest rate caps - third party	18,932			—			18,932			—			—			18,932
	Total derivatives subject to a master netting arrangement or similar arrangement	29,875			—			29,875			—			—			29,875
	Total derivatives not subject to a master netting arrangement or similar arrangement	—			—			—			—			—			—
	Total derivative assets	$	29,875		$	—		$	29,875		$	—		$	—		$	29,875
	Total financial assets	$	29,875		$	—		$	29,875		$	—		$	—		$	29,875
		Offsetting of Financial Liabilities
														Gross Amounts Not Offset in the
														Consolidated Balance Sheet
		Gross			Gross Amounts			Net Amounts of Liabilities Presented			Financial			Cash			Net
		Amounts of			Offset in the			in the			Instruments			Collateral			Amount
		Recognized			Consolidated			Consolidated						Pledged
		Liabilities			Balance Sheet			Balance Sheet
	June 30, 2014
	Interest rate swaps - Santander & affiliates	$	31,169		$	(9,612	)	$	21,557		$	—		$	—		$	21,557
	Back to back - Santander & affiliates	33,201			(32,369		)	$	832		$	—		$	—		$	832
	Back to back - third party	13,476			(13,476		)	—			—			—			—
	Total derivatives subject to a master netting arrangement or similar arrangement	77,846			(55,457		)	22,389			—			—			22,389
	Total derivatives not subject to a master netting arrangement or similar arrangement	—			—			—			—			—			—
	Total derivative liabilities	$	77,846		$	(55,457	)	$	22,389		$	—		$	—		$	22,389
	Total financial liabilities	$	77,846		$	(55,457	)	$	22,389		$	—		$	—		$	22,389
	December 31, 2013
	Interest rate swaps - Santander & affiliates	$	38,647		$	(2,258	)	$	36,389		$	—		$	—		$	36,389
	Back to back - Santander & affiliates	9,342			(9,342		)	—			—			—			—
	Back to back - third party	19,047			(15,420		)	3,627			—			—			3,627
	Total derivatives subject to a master netting arrangement or similar arrangement	67,036			(27,020		)	40,016			—			—			40,016
	Total derivatives not subject to a master netting arrangement or similar arrangement	—			—			—			—			—			—
	Total derivative liabilities	$	67,036		$	(27,020	)	$	40,016		$	—		$	—		$	40,016
	Total financial liabilities	$	67,036		$	(27,020	)	$	40,016		$	—		$	—		$	40,016
Gross Gains (Losses) Reclassified from Accumulated Other Comprehensive Income	'
	The gross gains (losses) reclassified from accumulated other comprehensive income to net income, and  gains (losses) recognized in net income, are included as components of interest expense. The Company’s interest rate swap agreements had effects on its consolidated statements of income and comprehensive income for the three and six months ended June 30, 2014 and 2013 as follows:
		Three Months Ended									Three Months Ended
		June 30, 2014									June 30, 2013
		Gains  (Losses)			Gross Gains (Losses)			Gross Gains (Losses)			Gains (Losses)			Gross Gains (Losses)			Gross Gains (Losses)
		Recognized  in			Recognized in			Reclassified From			Recognized in			Recognized in			Reclassified From
		Interest  Expense			Accumulated  Other			Accumulated  Other			Interest Expense			Accumulated  Other			Accumulated  Other
					Comprehensive			Comprehensive  Income to Interest Expense						Comprehensive			Comprehensive  Income
					Income									Income			to Interest Expense
	Interest rate swap agreements designated as cash flow hedges	$	(47	)	$	(7,246	)	$	(1,931	)	$	—		$	(1,155	)	$	(4,444	)
	Derivative instruments not designated as hedges	$	3,199								$	10,682
		Six Months Ended									Six Months Ended
		June 30, 2014									June 30, 2013
		Gains (Losses)			Gross Gains (Losses)			Gross Gains (Losses)			Gains (Losses)			Gross Gains (Losses)			Gross Gains (Losses)
		Recognized in			Recognized in			Reclassified From			Recognized in			Recognized in			Reclassified From
		Interest  Expense			Accumulated  Other			Accumulated  Other			Interest  Expense			Accumulated  Other			Accumulated Other
					Comprehensive			Comprehensive  Income To Interest Expense						Comprehensive			Comprehensive  Income
					Income									Income			to Interest Expense
	Interest rate swap agreements designated as cash flow hedges	$	91		$	(6,592	)	$	(4,595	)	$	—		$	(1,660	)	$	(9,439	)
	Derivative instruments not designated as hedges	$	8,388								$	17,339

Other_Assets_Tables

Other Assets (Tables)	6 Months Ended
	Jun. 30, 2014
Other Assets [Abstract]	'
Other Assets	'
	Other assets were comprised as follows:
		June 30,		December 31,
		2014		2013
	Upfront fee (a)	$	132,500	$	140,000
	Inventory of repossessed vehicles	140,792		129,323
	Manufacturer subvention payments receivable (a)	73,240		55,579
	Derivative assets (Note 7)	47,168		29,875
	Indemnification payments receivable (b)	8,603		8,603
	Other	90,884		46,925
		$	493,187	$	410,305
	(a)	These amounts relate to the Chrysler agreement. The Company paid a $150,000 upfront fee at the effective date of the agreement. This fee is being amortized into finance and other interest income over the ten-year term of the agreement. As the preferred financing provider for Chrysler, the Company is entitled to subvention payments on loans and leases with below-market customer payments.
	(b)	This amount represents tax indemnification payments to the original equity investors in two investment partnerships now owned by the Company. These payments are expected to be recovered through tax refunds passed through to the Company as the original investors recognize losses related to the investments.

RelatedParty_Transactions_Tabl

Related-Party Transactions (Tables)	6 Months Ended
	Jun. 30, 2014
Dealer Loan Portfolio	'
Related Party Transaction [Line Items]	'
Information on Dealer Loan Portfolio	'
	Other information on the dealer loan portfolio serviced for SBNA as of June 30, 2014 and December 31, 2013 is as follows:
		June 30,		December 31,
		2014		2013
	Total serviced portfolio	$	764,869	$	513,684
	Cash collections due to owner, net	$	10,930	$	6,941
	Servicing fees receivable	$	1,676	$	817
Serviced Auto Loan and Retail Installment	'
Related Party Transaction [Line Items]	'
Information on Dealer Loan Portfolio	'
	Other information on the serviced auto loan and retail installment contract portfolios for SBNA as of June 30, 2014 and December 31, 2013 is as follows:
		June 30,		December 31,
		2014		2013
	Total serviced portfolio	$	1,017,002	$	1,175,566
	Cash collections due to owner	$	30,522	$	32,831
	Servicing fees receivable (refundable)	$	2,566	$	(3,163	)
Consumer Vehicle Lease	'
Related Party Transaction [Line Items]	'
Information on Dealer Loan Portfolio	'
	Other information on the consumer vehicle lease portfolio serviced for SBNA as of June 30, 2014 is as follows:
		June 30,
		2014
	Total serviced portfolio	$	1,077,111
	Cash collections due to owner	$	6,055
	Origination and servicing fees receivable	$	2,499

Computation_of_Basic_and_Dilut1

Computation of Basic and Diluted Earnings per Common Share (Tables)	6 Months Ended
	Jun. 30, 2014
Earnings Per Share [Abstract]	'
Summary of Computation of Basic and Diluted Earnings per Common Share	'
		Three Months Ended				Six Months Ended
		June 30,				June 30,
		2014		2013		2014		2013
	Earnings per common share
	Net income attributable to SCUSA	$	246,481	$	181,918	$	327,947	$	472,320
	Weighted average number of common shares outstanding before restricted participating shares (in thousands)	348,243		346,171		347,882		346,168
	Weighted average number of participating restricted common shares outstanding (in thousands)	584		—		584		—
	Weighted average number of common shares outstanding (in thousands)	348,827		346,171		348,466		346,168
	Earnings per common share	$	0.71	$	0.53	$	0.94	$	1.36
	Earnings per common share - assuming dilution
	Net income attributable to SCUSA	$	246,481	$	181,918	$	327,947	$	472,320
	Weighted average number of common shares outstanding (in thousands)	348,827		346,171		348,466		346,168
	Effect of employee stock-based awards (in thousands)	7,555		—		7,543		—
	Weighted average number of common shares outstanding - assuming dilution (in thousands)	356,382		346,171		356,008		346,168
	Earnings per common share - assuming dilution	$	0.69	$	0.53	$	0.92	$	1.36

Fair_Value_of_Financial_Instru1

Fair Value of Financial Instruments (Tables)	6 Months Ended
	Jun. 30, 2014
Fair Value Disclosures [Abstract]	'
Summary of Fair Value Estimates, Methods and Assumptions	'
	Fair value estimates, methods, and assumptions are as follows:
		June 30, 2014				December 31, 2013
		Carrying		Estimated		Carrying		Estimated
		Value		Fair Value		Value		Fair Value
	Cash and cash equivalents (a)	$	45,913	$	45,913	$	10,531	$	10,531
	Receivables held for sale (b)	123,791		124,120		82,503		83,344
	Retail installment contracts held for investment, net (c)	21,444,601		21,961,413		20,219,609		21,465,236
	Unsecured consumer loans, net (d)	1,233,637		1,321,051		954,189		1,187,286
	Receivables from dealers held for investment (e)	85,194		85,194		94,745		94,745
	Restricted cash (a)	2,007,946		2,007,946		1,563,613		1,563,613
	Notes payable — credit facilities (f)	7,762,950		7,762,950		8,099,773		8,099,773
	Notes payable — secured structured financings (g)	18,391,660		18,544,914		15,195,887		15,565,013
	(a)	Cash and cash equivalents and restricted cash — The carrying amount of cash and cash equivalents, including restricted cash, approximated fair value at June 30, 2014 and December 31, 2013, due to the short maturity of these instruments and is considered a Level 1 measurement.
	(b)	Receivables held for sale — Receivables held for sale are carried at the lower of cost or market, as determined on an aggregate basis. The estimated fair value is based on the prices obtained or expected to be obtained in the subsequent sales and is considered a Level 2 measurement.
	(c)	Retail installment contracts held for investment — Retail installment contracts held for investment are carried at amortized cost, net of loan loss allowance. The estimated fair value is calculated based on estimated market rates for similar contracts with similar credit risks and is considered a Level 3 measurement.
	(d)	Unsecured consumer loans, net — Unsecured consumer loans are carried at amortized cost, net of loan loss allowance. Carrying value approximates fair value for unsecured revolving loans because the loans are short term in duration, do not have a defined maturity date and/or are at a market-based interest rate. For unsecured amortizing loans, the estimated fair value is calculated based on estimated market rates for similar loans with similar credit risks and is considered a level 3 measurement.
	(e)	Receivables from dealers, held for investment, net — Receivables from dealers held for investment are carried at amortized cost, net of loan loss allowance. The estimated fair value is calculated based on estimated market rates for similar receivables with similar credit risks and is considered a Level 3 measurement.
	(f)	Notes payable — credit facilities — The carrying amount of notes payable related to revolving credit facilities is estimated to approximate fair value as of June 30, 2014 and December 31, 2013. Management believes that the terms of these credit agreements approximate market terms for similar credit agreements. The fair value of notes payable is considered a Level 3 measurement.
	(g)	Notes payable — secured structured financings — The estimated fair value of notes payable related to secured structured financings is calculated based on market quotes for the Company’s publicly traded debt and estimated market rates currently available from recent transactions involving similar debt with similar credit risks, and is considered a Level 2 measurement.
Assets and Liabilities Measured at Fair Value on a Recurring Basis	'
	The following table presents the Company’s assets and liabilities that are measured at fair value on a recurring basis at June 30, 2014 and December 31, 2013, and are categorized using the fair value hierarchy. The fair value hierarchy includes three levels based on the reliability of the inputs used to determine the fair value:
		Fair Value Measurements at June 30, 2014
		Total		Quoted Prices		Significant		Significant
				in Active		Other		Unobservable
				Markets for		Observable		Inputs
				Identical Assets		Inputs		(Level 3)
				(Level 1)		(Level 2)
	Assets — trading interest rate caps (a)	$	46,631	$	—	$	46,631	$	—
	Assets — cash flow hedging interest rate swaps (a)	$	537	$	—	$	537	$	—
	Assets — trading interest rate swaps (a)	$	—	$	—	$	—	$	—
	Liabilities — trading options for interest rate	$	46,677	$	—	$	46,677	$	—
	caps (a)
	Liabilities — cash flow hedging interest rate	$	8,129	$	—	$	8,129	$	—
	swaps (a)
	Liabilities — trading interest rate swaps (a)	$	23,041	$	—	$	23,041	$	—
	Total return swap (b)	$	—	$	—	$	—	$	—
		Fair Value Measurements at December 31, 2013
		Total		Quoted Prices		Significant		Significant
				in Active		Other		Unobservable
				Markets for		Observable		Inputs
				Identical Assets		Inputs		(Level 3)
				(Level 1)		(Level 2)
	Assets — trading interest rate caps (a)	$	28,274	$	—	$	28,274	$	—
	Assets — cash flow hedging interest rate swaps (a)	$	1,601	$	—	$	1,601	$	—
	Liabilities — trading options for interest rate	$	28,389	$	—	$	28,389	$	—
	caps (a)
	Liabilities — cash flow hedging interest rate	$	7,287	$	—	$	7,287	$	—
	swaps (a)
	Liabilities — trading interest rate swaps (a)	$	31,360	$	—	$	31,360	$	—
	(a)	The valuation of swaps and caps is determined using widely accepted valuation techniques including discounted cash flow analysis on the expected cash flows of each derivative. This analysis reflects the contractual terms of the derivative, including the period to maturity, and uses observable market-based inputs. The Company incorporates credit valuation adjustments to appropriately reflect both its own nonperformance risk and the respective counterparty’s nonperformance risk in the fair value measurement of its derivatives. In adjusting the fair value of its derivative contracts for the effect of nonperformance risk, the Company has considered the impact of netting and any applicable credit enhancements, such as collateral postings and guarantees. The Company utilizes the exception in ASC 820-10-35-18D (commonly referred to as the “portfolio exception”) with respect to measuring counterparty credit risk for instruments (Note 7).
	(b)	The total return swap is valued based on the estimated market value of the underlying bonds pledged to the associated credit facility.
Assets and Liabilities Measured at Fair Value on Nonrecurring Basis	'
	The following table presents the Company’s assets and liabilities that are measured at fair value on a nonrecurring basis at June 30, 2014 and December 31, 2013, and are categorized using the fair value hierarchy:
		Fair Value Measurements at June 30, 2014
		Total		Quoted Prices		Significant		Significant
				in Active		Other		Unobservable
				Markets for		Observable		Inputs
				Identical Assets		Inputs		(Level 3)
				(Level 1)		(Level 2)
	Assets — repossessed vehicle inventory	$	140,792	$	—	$	140,792	$	—
		Fair Value Measurements at December 31, 2013
		Total		Quoted Prices		Significant		Significant
				in Active		Other		Unobservable
				Markets for		Observable		Inputs
				Identical Assets		Inputs		(Level 3)
				(Level 1)		(Level 2)
	Assets — repossessed vehicle inventory	$	129,323	$	—	$	129,323	$	—

Employee_Benefit_Plans_Tables

Employee Benefit Plans (Tables)	6 Months Ended
	Jun. 30, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]	'
Summary of Stock Options and Related Activity	'
	A summary of the Company’s stock options and related activity as of and for the six months ended June 30, 2014 is as follows:
		Shares		Weighted			Weighted	Aggregate
				Average			Average	Intrinsic
				Exercise			Remaining	Value
				Price			Contractual
							Term (Years)
		(in whole dollars)
	Options outstanding at January 1, 2014	23,910,062		$	9.81		8
	Granted	1,539,861		23.94
	Exercised	(2,977,250	)	9.55				(43,836	)
	Expired	—		—
	Forfeited	(722,634	)	(12.36		)
	Options outstanding at June 30, 2014	21,750,039		10.76			7.7	188,766
	Options exercisable at June 30, 2014	15,620,920		9.87			7.5	149,421

Shareholders_Equity_Tables

Shareholders' Equity (Tables)	6 Months Ended
	Jun. 30, 2014																				Jun. 30, 2013
Equity [Abstract]	'																				'
Summary of Changes in Accumulated Other Comprehensive Loss	'																				'
	A summary of changes in accumulated other comprehensive loss, net of tax, for the six months ended June 30, 2014 and 2013 is as follows:
		Three Months Ended June 30, 2014										Three Months Ended June 30, 2013
		Unrealized gains (losses) on cash flow hedges (a)			Unrealized gains (losses) on investments available for sale (a)			Total				Unrealized gains (losses) on cash flow hedges (a)			Unrealized gains (losses) on investments available for sale (a)			Total
	Beginning balance	$	(765	)	$	—		$	(765	)		$	(9,582	)	$	1,796		$	(7,786	)
	Other comprehensive income (loss) before	(4,579		)	—			(4,579		)		(804		)	(887		)	(1,691		)
	reclassifications
	Amounts reclassified out of accumulated	1,215			—			1,215				2,804			(279		)	2,525
	other comprehensive income (loss) (b)
	Ending balance	$	(4,129	)	$	—		$	(4,129	)		$	(7,582	)	$	630		$	(6,952	)
	(a) Amounts in this table are net of tax
	(b) Amounts reclassified out of accumulated other comprehensive income (loss) consist of the following:
					Three Months Ended June 30, 2014					Three Months Ended June 30, 2013
	Reclassification				Amount reclassified			Income statement line item		Amount reclassified				Income statement line item
	Cash flow hedges:
	Settlements of derivatives				$	1,931		Interest expense		$	4,444			Interest expense
	Tax expense (benefit)				(716		)			(1,640		)
	Net of tax				$	1,215				$	2,804
	Investments available for sale:
	Discount accretion				$	—				$	(443	)		Interest expense
	Tax expense (benefit)				—					164
	Net of tax				$	—				$	(279	)
		Six Months Ended June 30, 2014										Six Months Ended June 30, 2013
		Unrealized gains (losses) on cash flow hedges (a)			Unrealized gains (losses) on investments available for sale (a)			Total				Unrealized gains (losses) on cash flow hedges (a)			Unrealized gains (losses) on investments available for sale (a)			Total
	Beginning balance	$	(2,853	)	$	—		$	(2,853	)		$	(12,416	)	$	3,252		$	(9,164	)
	Other comprehensive income (loss) before	(4,167		)	—			(4,167		)		(1,123		)	(2,022		)	(3,145		)
	reclassifications
	Amounts reclassified out of accumulated	2,891			—			2,891				5,957			(600		)	5,357
	other comprehensive income (loss) (b)
	Ending balance	$	(4,129	)	$	—		$	(4,129	)		$	(7,582	)	$	630		$	(6,952	)
	(a) Amounts in this table are net of tax
	(b) Amounts reclassified out of accumulated other comprehensive income (loss) consist of the following:
					Six Months Ended June 30, 2014					Six Months Ended June 30, 2013
	Reclassification				Amount reclassified			Income statement line item		Amount reclassified				Income statement line item
	Cash flow hedges:
	Settlements of derivatives				$	4,595		Interest expense		$	9,439			Interest expense
	Tax expense (benefit)				(1,704		)			(3,482		)
	Net of tax				$	2,891				$	5,957
	Investments available for sale:
	Discount accretion				$	—				$	(951	)		Interest expense
	Tax expense (benefit)				—					351
	Net of tax				$	—				$	(600	)
Reclassification of Amounts Out of Accumulated Other Comprehensive Income (Loss)	'																				'
	Amounts reclassified out of accumulated other comprehensive income (loss) consist of the following:																				(b) Amounts reclassified out of accumulated other comprehensive income (loss) consist of the following:
					Six Months Ended June 30, 2014					Six Months Ended June 30, 2013												Three Months Ended June 30, 2014				Three Months Ended June 30, 2013
	Reclassification				Amount reclassified			Income statement line item		Amount reclassified				Income statement line item							Reclassification	Amount reclassified			Income statement line item	Amount reclassified			Income statement line item
	Cash flow hedges:																				Cash flow hedges:
	Settlements of derivatives				$	4,595		Interest expense		$	9,439			Interest expense							Settlements of derivatives	$	1,931		Interest expense	$	4,444		Interest expense
	Tax expense (benefit)				(1,704		)			(3,482		)									Tax expense (benefit)	(716		)		(1,640		)
	Net of tax				$	2,891				$	5,957										Net of tax	$	1,215			$	2,804
	Investments available for sale:																				Investments available for sale:
	Discount accretion				$	—				$	(951	)		Interest expense							Discount accretion	$	—			$	(443	)	Interest expense
	Tax expense (benefit)				—					351											Tax expense (benefit)	—				164
	Net of tax				$	—				$	(600	)									Net of tax	$	—			$	(279	)

Description_of_Business_Basis_2

Description of Business, Basis of Presentation, and Changes in Significant Accounting Policies and Practices - Additional Information (Details)	6 Months Ended
	Jun. 30, 2014
	segment
Organization, Consolidation and Presentation of Financial Statements [Abstract]	'
Number of reportable segments	1
Chrysler Group	'
Basis Of Presentation And Significant Accounting Policies [Line Items]	'
Financing contract term	'10 years
Santander Holdings USA, Inc.	'
Basis Of Presentation And Significant Accounting Policies [Line Items]	'
Ownership percentage held by third parties	60.50%
Auto Finance Holdings Series LP	'
Basis Of Presentation And Significant Accounting Policies [Line Items]	'
Ownership percentage held by third parties	4.10%
DDFS LLC	'
Basis Of Presentation And Significant Accounting Policies [Line Items]	'
Ownership percentage held by third parties	10.00%
Public Shareholders	'
Basis Of Presentation And Significant Accounting Policies [Line Items]	'
Ownership percentage held by third parties	25.30%
Other Related Parties	'
Basis Of Presentation And Significant Accounting Policies [Line Items]	'
Ownership percentage held by third parties	0.10%

Finance_Receivables_Summary_of

Finance Receivables - Summary of Finance Receivables Held for Investment (Details) (USD $)	Jun. 30, 2014		Dec. 31, 2013
In Thousands, unless otherwise specified
Accounts Notes And Loans Receivable [Line Items]	'		'
Retail installment contracts held for investment, net	$21,444,601	[1]	$20,219,609
Receivables from dealers held for investment	85,194	[2]	94,745
Unsecured consumer loans	1,233,637	[3]	954,189
Loans Acquired Individually	'		'
Accounts Notes And Loans Receivable [Line Items]	'		'
Retail installment contracts held for investment, net	20,383,317		18,566,121
Purchased Receivables Portfolios	'		'
Accounts Notes And Loans Receivable [Line Items]	'		'
Retail installment contracts held for investment, net	1,061,284		1,653,488
Receivables from Dealers Held for Investments	'		'
Accounts Notes And Loans Receivable [Line Items]	'		'
Receivables from dealers held for investment	85,194		94,745
Unsecured Consumer Loans	'		'
Accounts Notes And Loans Receivable [Line Items]	'		'
Unsecured consumer loans	1,233,637		954,189
Unpaid Principal Balance	'		'
Accounts Notes And Loans Receivable [Line Items]	'		'
Retail installment contracts held for investment, net	24,948,696		23,199,341
Unpaid Principal Balance | Loans Acquired Individually	'		'
Accounts Notes And Loans Receivable [Line Items]	'		'
Retail installment contracts held for investment, net	23,675,889		21,238,281
Unpaid Principal Balance | Purchased Receivables Portfolios	'		'
Accounts Notes And Loans Receivable [Line Items]	'		'
Retail installment contracts held for investment, net	1,272,807		1,961,060
Unpaid Principal Balance | Receivables from Dealers Held for Investments	'		'
Accounts Notes And Loans Receivable [Line Items]	'		'
Receivables from dealers held for investment	85,885		95,835
Unpaid Principal Balance | Unsecured Consumer Loans	'		'
Accounts Notes And Loans Receivable [Line Items]	'		'
Unsecured consumer loans	1,448,709		1,165,778
Loan Loss Allowance	'		'
Accounts Notes And Loans Receivable [Line Items]	'		'
Retail installment contracts held for investment, net	-2,866,431		-2,358,990
Loan Loss Allowance | Loans Acquired Individually	'		'
Accounts Notes And Loans Receivable [Line Items]	'		'
Retail installment contracts held for investment, net	-2,668,587		-2,132,634
Loan Loss Allowance | Purchased Receivables Portfolios	'		'
Accounts Notes And Loans Receivable [Line Items]	'		'
Retail installment contracts held for investment, net	-197,844		-226,356
Loan Loss Allowance | Receivables from Dealers Held for Investments	'		'
Accounts Notes And Loans Receivable [Line Items]	'		'
Receivables from dealers held for investment	-923		-1,090
Loan Loss Allowance | Unsecured Consumer Loans	'		'
Accounts Notes And Loans Receivable [Line Items]	'		'
Unsecured consumer loans	-212,954		-179,350
Discount	'		'
Accounts Notes And Loans Receivable [Line Items]	'		'
Retail installment contracts held for investment, net	-672,833		-654,678
Discount | Loans Acquired Individually	'		'
Accounts Notes And Loans Receivable [Line Items]	'		'
Retail installment contracts held for investment, net	-659,154		-573,462
Discount | Purchased Receivables Portfolios	'		'
Accounts Notes And Loans Receivable [Line Items]	'		'
Retail installment contracts held for investment, net	-13,679		-81,216
Discount | Receivables from Dealers Held for Investments	'		'
Accounts Notes And Loans Receivable [Line Items]	'		'
Receivables from dealers held for investment	0		0
Discount | Unsecured Consumer Loans	'		'
Accounts Notes And Loans Receivable [Line Items]	'		'
Unsecured consumer loans	-3,067		-32,831
Capitalized Origination Costs and Fees	'		'
Accounts Notes And Loans Receivable [Line Items]	'		'
Retail installment contracts held for investment, net	35,169		33,936
Capitalized Origination Costs and Fees | Loans Acquired Individually	'		'
Accounts Notes And Loans Receivable [Line Items]	'		'
Retail installment contracts held for investment, net	35,169		33,936
Capitalized Origination Costs and Fees | Purchased Receivables Portfolios	'		'
Accounts Notes And Loans Receivable [Line Items]	'		'
Retail installment contracts held for investment, net	0		0
Capitalized Origination Costs and Fees | Receivables from Dealers Held for Investments	'		'
Accounts Notes And Loans Receivable [Line Items]	'		'
Receivables from dealers held for investment	232		0
Capitalized Origination Costs and Fees | Unsecured Consumer Loans	'		'
Accounts Notes And Loans Receivable [Line Items]	'		'
Unsecured consumer loans	$949		$592
[1]	Retail installment contracts held for investment — Retail installment contracts held for investment are carried at amortized cost, net of loan loss allowance. The estimated fair value is calculated based on estimated market rates for similar contracts with similar credit risks and is considered a Level 3 measurement.
[2]	Receivables from dealers, held for investment, net — Receivables from dealers held for investment are carried at amortized cost, net of loan loss allowance. The estimated fair value is calculated based on estimated market rates for similar receivables with similar credit risks and is considered a Level 3 measurement.
[3]	Unsecured consumer loans, net — Unsecured consumer loans are carried at amortized cost, net of loan loss allowance. Carrying value approximates fair value for unsecured revolving loans because the loans are short term in duration, do not have a defined maturity date and/or are at a market-based interest rate. For unsecured amortizing loans, the estimated fair value is calculated based on estimated market rates for similar loans with similar credit risks and is considered a level 3 measurement.

Finance_Receivables_Additional

Finance Receivables - Additional Information (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014		Jun. 30, 2014		Dec. 31, 2013
Schedule Of Financing Receivables [Line Items]	'		'		'
Retail installment contracts held for sale	$89,404,000		$89,404,000		$56,066,000
Principal amount sold on loans securitized	1,384,174,000		3,069,898,000		'
Servicing of sold retail installment contracts	4,589,650		4,589,650		2,847,656
Unpaid principal balance of fleet contracts with commercial consumers	605,261,000		605,261,000		345,177,000
Committed amount	15,707,974,000		15,707,974,000		15,273,673,000
Utilized balance	7,762,950,000	[1]	7,762,950,000	[1]	8,099,773,000
Interest receivable on purchased receivables	10,516,000		10,516,000		16,950,000
Texas	'		'		'
Schedule Of Financing Receivables [Line Items]	'		'		'
Retail installment contracts held for investment	18.00%		18.00%		'
Percentage of unsecured consumer loans	8.00%		8.00%		'
Florida	'		'		'
Schedule Of Financing Receivables [Line Items]	'		'		'
Retail installment contracts held for investment	11.00%		11.00%		'
Percentage of unsecured consumer loans	6.00%		6.00%		'
California	'		'		'
Schedule Of Financing Receivables [Line Items]	'		'		'
Retail installment contracts held for investment	9.00%		9.00%		'
Percentage of remaining receivable from dealers held for investment	14.00%		14.00%		'
Percentage of unsecured consumer loans	10.00%		10.00%		'
Georgia	'		'		'
Schedule Of Financing Receivables [Line Items]	'		'		'
Retail installment contracts held for investment	5.00%		5.00%		'
Other States (less than 5%)	'		'		'
Schedule Of Financing Receivables [Line Items]	'		'		'
Retail installment contracts held for investment	5.00%		5.00%		'
Percentage of remaining receivable from dealers held for investment	5.00%		5.00%		'
Percentage of unsecured consumer loans	5.00%		5.00%		'
Ohio	'		'		'
Schedule Of Financing Receivables [Line Items]	'		'		'
Percentage of remaining receivable from dealers held for investment	31.00%		31.00%		'
New York	'		'		'
Schedule Of Financing Receivables [Line Items]	'		'		'
Percentage of remaining receivable from dealers held for investment	19.00%		19.00%		'
Percentage of unsecured consumer loans	8.00%		8.00%		'
Tennessee	'		'		'
Schedule Of Financing Receivables [Line Items]	'		'		'
Percentage of remaining receivable from dealers held for investment	12.00%		12.00%		'
Louisiana	'		'		'
Schedule Of Financing Receivables [Line Items]	'		'		'
Percentage of remaining receivable from dealers held for investment	9.00%		9.00%		'
Mississippi	'		'		'
Schedule Of Financing Receivables [Line Items]	'		'		'
Percentage of remaining receivable from dealers held for investment	5.00%		5.00%		'
Pennsylvania	'		'		'
Schedule Of Financing Receivables [Line Items]	'		'		'
Percentage of unsecured consumer loans	5.00%		5.00%		'
Receivables From Dealers	'		'		'
Schedule Of Financing Receivables [Line Items]	'		'		'
Retail installment contracts held for sale	34,387,000		34,387,000		26,437,000
Principal amount sold on loans securitized	'		0		'
Line Of Credit Warehouse Facility One [Member]	'		'		'
Schedule Of Financing Receivables [Line Items]	'		'		'
Committed amount	50,000,000		50,000,000		50,000,000
Utilized balance	$50,000,000		$50,000,000		$50,000,000
[1]	Notes payable — credit facilities — The carrying amount of notes payable related to revolving credit facilities is estimated to approximate fair value as of June 30, 2014 and December 31, 2013. Management believes that the terms of these credit agreements approximate market terms for similar credit agreements. The fair value of notes payable is considered a Level 3 measurement.

Finance_Receivables_Changes_in

Finance Receivables - Changes in Accretable Yield on Purchased Receivables Portfolios (Details) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward]	'	'	'	'
Balance at beginning of period	$362,823	$743,348	$403,400	$816,854
Accretion of accretable yield	-52,519	-112,513	-117,565	-247,712
Reclassifications from (to) nonaccretable difference	-5,050	-95,179	19,419	-33,486
Balance at end of period	$305,254	$535,656	$305,254	$535,656

Loan_Loss_Allowance_and_Credit2

Loan Loss Allowance and Credit Quality - Summary of Activity in Loan Loss Allowance (Details) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Retail Installment Contracts Acquired Individually	'	'	'	'
Allowance for Loan and Lease Losses [Roll Forward]	'	'	'	'
Balance — beginning of period	$2,444,552	$1,660,612	$2,132,634	$1,555,362
Provision for loan losses	527,362	375,281	1,184,068	626,922
Charge-offs	-700,965	-369,395	-1,453,530	-754,121
Recoveries	397,638	197,815	805,415	436,150
Balance — end of period	2,668,587	1,864,313	2,668,587	1,864,313
Receivables from Dealers Held for Investments	'	'	'	'
Allowance for Loan and Lease Losses [Roll Forward]	'	'	'	'
Balance — beginning of period	1,035	0	1,090	0
Provision for loan losses	-112	1,490	-167	1,490
Charge-offs	0	0	0	'
Recoveries	0	0	0	0
Balance — end of period	923	1,490	923	1,490
Unsecured Consumer Loans	'	'	'	'
Allowance for Loan and Lease Losses [Roll Forward]	'	'	'	'
Balance — beginning of period	203,190	0	179,350	0
Provision for loan losses	70,212	39,256	132,341	39,256
Charge-offs	-66,966	-6	-107,914	-6
Recoveries	6,518	0	9,177	0
Balance — end of period	$212,954	$39,250	$212,954	$39,250

Loan_Loss_Allowance_and_Credit3

Loan Loss Allowance and Credit Quality - Summary of Activity in Loan Loss Allowance Related to Purchased Receivables Portfolios (Details) (Purchased Receivables Portfolios, USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Purchased Receivables Portfolios	'	'	'	'
Allowance for Loan and Lease Losses [Roll Forward]	'	'	'	'
Balance — beginning of period	$206,170	$184,192	$226,356	$218,640
Incremental provisions for purchased receivable portfolios	350	18,314	1,675	39,976
Incremental reversal of provisions for purchased receivable portfolios	-8,676	-25,930	-30,187	-82,040
Balance — end of period	$197,844	$176,576	$197,844	$176,576

Loan_Loss_Allowance_and_Credit4

Loan Loss Allowance and Credit Quality - Summary of Delinquencies (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Financing Receivable Recorded Investment Past Due [Line Items]	'	'
Principal, current	$22,028,789	$20,111,640
Principal, 31-60 days past due	2,023,330	2,050,688
Delinquent principal over 60 days	896,577	1,037,013
Total principal	24,948,696	23,199,341
Loans Acquired Individually	'	'
Financing Receivable Recorded Investment Past Due [Line Items]	'	'
Principal, current	21,047,173	18,653,827
Principal, 31-60 days past due	1,829,261	1,729,139
Delinquent principal over 60 days	799,455	855,315
Total principal	23,675,889	21,238,281
Purchased Receivables Portfolios	'	'
Financing Receivable Recorded Investment Past Due [Line Items]	'	'
Principal, current	981,616	1,457,813
Principal, 31-60 days past due	194,069	321,549
Delinquent principal over 60 days	97,122	181,698
Total principal	1,272,807	1,961,060
Receivables from Dealers Held for Investments	'	'
Financing Receivable Recorded Investment Past Due [Line Items]	'	'
Principal, current	85,885	95,835
Principal, 31-60 days past due	0	0
Delinquent principal over 60 days	0	0
Total principal	85,885	95,835
Unsecured Consumer Loans	'	'
Financing Receivable Recorded Investment Past Due [Line Items]	'	'
Principal, current	1,283,884	1,072,316
Principal, 31-60 days past due	45,382	28,102
Delinquent principal over 60 days	119,443	65,360
Total principal	$1,448,709	$1,165,778

Loan_Loss_Allowance_and_Credit5

Loan Loss Allowance and Credit Quality - Summary of Credit Risk Profile (Details)	Jun. 30, 2014	Dec. 31, 2013
FICO Band 540	'	'
Financing Receivable Recorded Investment [Line Items]	'	'
Retail Installment Contracts Held for Investment	26.70%	26.80%
Unsecured Consumer Loans	10.00%	6.30%
FICO Band 540-599	'	'
Financing Receivable Recorded Investment [Line Items]	'	'
Retail Installment Contracts Held for Investment	32.30%	31.80%
Unsecured Consumer Loans	21.30%	24.20%
FICO Band 600-659	'	'
Financing Receivable Recorded Investment [Line Items]	'	'
Retail Installment Contracts Held for Investment	26.50%	26.30%
Unsecured Consumer Loans	40.90%	39.40%
FICO Band 660	'	'
Financing Receivable Recorded Investment [Line Items]	'	'
Retail Installment Contracts Held for Investment	14.50%	15.10%
Unsecured Consumer Loans	27.80%	30.10%

Loan_Loss_Allowance_and_Credit6

Loan Loss Allowance and Credit Quality - Summary Commercial Loan Credit Quality Indicators for Receivables from Dealers Held for Investment (Details) (Receivables From Dealers, USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Financing Receivable Recorded Investment [Line Items]	'	'
Commercial Loan Credit Quality Indicators	$85,885	$95,835
Pass	'	'
Financing Receivable Recorded Investment [Line Items]	'	'
Commercial Loan Credit Quality Indicators	83,754	95,835
Special Mention	'	'
Financing Receivable Recorded Investment [Line Items]	'	'
Commercial Loan Credit Quality Indicators	2,131	0
Substandard	'	'
Financing Receivable Recorded Investment [Line Items]	'	'
Commercial Loan Credit Quality Indicators	0	0
Doubtful	'	'
Financing Receivable Recorded Investment [Line Items]	'	'
Commercial Loan Credit Quality Indicators	0	0
Loss	'	'
Financing Receivable Recorded Investment [Line Items]	'	'
Commercial Loan Credit Quality Indicators	$0	$0

Loan_Loss_Allowance_and_Credit7

Loan Loss Allowance and Credit Quality - Summary of Company's TDRs (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Financing Receivable Modifications [Line Items]	'	'
Accrued interest	$344,658	$319,157
Retail Installment Contracts	'	'
Financing Receivable Modifications [Line Items]	'	'
Total TDR principal	3,151,614	2,604,351
Accrued interest	85,218	70,965
Discount	-87,743	-70,321
Origination costs	4,682	4,161
Outstanding recorded investment	3,153,771	2,609,156
Allowance for loan losses	-551,767	-475,128
Outstanding recorded investment, net of allowance	2,602,004	2,134,028
Unsecured Consumer Loans	'	'
Financing Receivable Modifications [Line Items]	'	'
Total TDR principal	19,540	8,391
Accrued interest	0	0
Discount	-58	-274
Origination costs	18	5
Outstanding recorded investment	19,500	8,122
Allowance for loan losses	-6,040	-2,345
Outstanding recorded investment, net of allowance	$13,460	$5,777

Loan_Loss_Allowance_and_Credit8

Loan Loss Allowance and Credit Quality - Summary of Performing and Non-performing TDRs (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Retail Installment Contracts	'	'
Troubled Debt Restructuring Debtor Current Period [Line Items]	'	'
Current	$2,171,354	$1,690,893
31-60 days past due	635,787	556,489
Greater than 60 days past due (non-performing)	344,473	356,969
Total TDRs	3,151,614	2,604,351
Unsecured Consumer Loans	'	'
Troubled Debt Restructuring Debtor Current Period [Line Items]	'	'
Current	13,008	6,120
31-60 days past due	972	875
Greater than 60 days past due (non-performing)	5,560	1,396
Total TDRs	$19,540	$8,391

Loan_Loss_Allowance_and_Credit9

Loan Loss Allowance and Credit Quality - Average Recorded Investment and Income Recognized on TDR Loans (Details) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Retail Installment Contracts	'	'	'	'
Financing Receivable Modifications [Line Items]	'	'	'	'
Average outstanding recorded investment in TDRs	$2,979,944	$1,683,372	$2,856,348	$1,628,540
Interest income recognized	112,138	38,260	232,589	130,401
Unsecured Consumer Loans	'	'	'	'
Financing Receivable Modifications [Line Items]	'	'	'	'
Average outstanding recorded investment in TDRs	14,570	62	12,510	41
Interest income recognized	$391	$1	$720	$1

Recovered_Sheet1

Loan Loss Allowance and Credit Quality - Summary of Loan Modification Accounted as TDRs (Details) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
	contract	contract	contract	contract
Retail Installment Contracts	'	'	'	'
Financing Receivable Modifications [Line Items]	'	'	'	'
Outstanding recorded investment before TDR	$743,664	$473,775	$1,367,673	$764,636
Outstanding recorded investment after TDR	699,158	444,971	1,280,211	733,812
Number of contracts	44,524	29,797	83,753	50,271
Unsecured Consumer Loans	'	'	'	'
Financing Receivable Modifications [Line Items]	'	'	'	'
Outstanding recorded investment before TDR	4,637	150	6,748	150
Outstanding recorded investment after TDR	$4,573	$149	$6,667	$149
Number of contracts	4,116	143	6,135	143

Recovered_Sheet2

Loan Loss Allowance and Credit Quality - Summary of Defaults in Loan Modifications Accounted as TDRs (Details) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
	contract	contract	contract	contract
Retail Installment Contracts	'	'	'	'
Financing Receivable Modifications [Line Items]	'	'	'	'
Troubled debt restructurings that subsequently defaulted	$70,811	$24,471	$120,275	$38,491
Number of contracts	7,234	2,609	13,123	4,234
Unsecured Consumer Loans	'	'	'	'
Financing Receivable Modifications [Line Items]	'	'	'	'
Troubled debt restructurings that subsequently defaulted	'	$0	'	'
Number of contracts	'	0	'	'

Leased_Vehicles_Net_Summary_of

Leased Vehicles, Net - Summary of Leased Vehicles (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Property Subject To Or Available For Operating Lease [Line Items]	'	'
Leased property expenses	$3,986,944	$2,145,616
Less: accumulated depreciation	-419,398	-122,183
Leased property expenses, net	3,567,546	2,023,433
Leased Vehicles	'	'
Property Subject To Or Available For Operating Lease [Line Items]	'	'
Leased property expenses	4,481,384	2,402,052
Origination Fees and Other Costs	'	'
Property Subject To Or Available For Operating Lease [Line Items]	'	'
Leased property expenses	1,157	2,716
Manufacturer Subvention Payments	'	'
Property Subject To Or Available For Operating Lease [Line Items]	'	'
Leased property expenses	($495,597)	($259,152)

Leased_Vehicles_Net_Future_Min

Leased Vehicles, Net - Future Minimum Rental Payments Due to Lessor under Operating Leases (Details) (USD $)	Jun. 30, 2014
In Thousands, unless otherwise specified
Leases [Abstract]	'
Remainder of 2014	$318,976
2015	616,414
2016	472,417
2017	90,436
2018	96
Thereafter	0
Total	$1,498,339

Debt_Schedule_of_Credit_Facili

Debt - Schedule of Credit Facilities (Details) (USD $)	6 Months Ended		12 Months Ended
	Jun. 30, 2014		Dec. 31, 2013
Line Of Credit Facility [Line Items]	'		'
Utilized Balance	$7,762,950,000	[1]	$8,099,773,000
Committed Amount	15,707,974,000		15,273,673,000
Assets Pledged	5,788,302,000		4,490,044,000
Restricted Cash Pledged	103,287,000		89,118,000
Line of Credit Warehouse Facility One	'		'
Line Of Credit Facility [Line Items]	'		'
Maturity Date	'2014-07	[2]	'2014-06
Utilized Balance	109,461,000	[2]	483,738,000
Committed Amount	500,000,000	[2]	500,000,000
Effective Rate	2.05%	[2]	0.82%
Assets Pledged	158,591,000	[2]	757,352,000
Restricted Cash Pledged	172,000	[2]	0
Line of Credit Warehouse Facility Two	'		'
Line Of Credit Facility [Line Items]	'		'
Maturity Date	'Various (b)	[3]	'Various
Utilized Balance	552,268,000		159,300,000
Committed Amount	1,235,038,000		1,219,474,000
Effective Rate	1.14%		3.62%
Assets Pledged	816,330,000		232,015,000
Restricted Cash Pledged	25,768,000		3,667,000
Line of Credit Warehouse Facility Three	'		'
Line Of Credit Facility [Line Items]	'		'
Maturity Date	'2016-01	[4]	'2015-04
Utilized Balance	1,318,088,000	[4]	613,600,000
Committed Amount	4,550,000,000	[4]	4,550,000,000
Effective Rate	1.15%	[4]	2.12%
Assets Pledged	1,756,086,000	[4]	745,759,000
Restricted Cash Pledged	35,685,000	[4]	15,184,000
Line of Credit Warehouse Facility Four	'		'
Line Of Credit Facility [Line Items]	'		'
Maturity Date	'2015-12		'2015-06
Utilized Balance	464,037,000		1,360,070,000
Committed Amount	2,000,000,000		2,000,000,000
Effective Rate	2.18%		0.96%
Assets Pledged	570,306,000		1,672,082,000
Restricted Cash Pledged	11,993,000		42,510,000
Line of Credit Warehouse Facility Five	'		'
Line Of Credit Facility [Line Items]	'		'
Maturity Date	'2015-07		'2015-07
Utilized Balance	153,515,000		495,786,000
Committed Amount	500,000,000		500,000,000
Effective Rate	1.64%		0.85%
Assets Pledged	191,391,000		598,754,000
Restricted Cash Pledged	7,532,000		25,056,000
Line of Credit Warehouse Facility Six	'		'
Line Of Credit Facility [Line Items]	'		'
Maturity Date	'2015-09	[5]	'2015-09
Utilized Balance	196,880,000	[5]	73,080,000
Committed Amount	200,000,000	[5]	200,000,000
Effective Rate	1.97%	[5]	2.84%
Assets Pledged	290,043,000	[5]	76,807,000
Restricted Cash Pledged	12,054,000	[5]	2,701,000
Repurchase Facilities	'		'
Line Of Credit Facility [Line Items]	'		'
Maturity Date	'Various	[6]	'Various
Utilized Balance	747,342,000	[6]	879,199,000
Committed Amount	747,342,000	[6]	879,199,000
Effective Rate	1.52%	[6]	1.59%
Assets Pledged	844,305,000	[6]	0
Restricted Cash Pledged	0	[6]	0
Line of Credit Warehouse Facility Seven	'		'
Line Of Credit Facility [Line Items]	'		'
Maturity Date	'2015-12		'2015-12
Utilized Balance	495,765,000		210,000,000
Committed Amount	750,000,000		750,000,000
Effective Rate	0.91%		1.84%
Assets Pledged	675,143,000		302,632,000
Restricted Cash Pledged	10,083,000		0
Line of Credit Warehouse Facility Eight	'		'
Line Of Credit Facility [Line Items]	'		'
Maturity Date	'2016-11	[7]	'2016-11
Utilized Balance	175,000,000	[7]	175,000,000
Committed Amount	175,000,000	[7]	175,000,000
Effective Rate	1.71%	[7]	1.72%
Assets Pledged	0	[7]	'
Restricted Cash Pledged	0	[7]	0
Line of Credit Warehouse Facility Nine	'		'
Line Of Credit Facility [Line Items]	'		'
Maturity Date	'2015-03	[8]	'
Utilized Balance	250,594,000	[8]	'
Committed Amount	250,594,000	[8]	'
Effective Rate	0.99%	[8]	'
Assets Pledged	296,929,000	[8]	'
Restricted Cash Pledged	0	[8]	'
Total Facilities with Third Parties	'		'
Line Of Credit Facility [Line Items]	'		'
Utilized Balance	4,462,950,000		4,449,773,000
Committed Amount	10,907,974,000		10,773,673,000
Assets Pledged	5,599,124,000		4,385,401,000
Restricted Cash Pledged	103,287,000		89,118,000
Line of Credit Facility One	'		'
Line Of Credit Facility [Line Items]	'		'
Maturity Date	'2016-12	[9]	'2016-12
Utilized Balance	500,000,000	[9]	500,000,000
Committed Amount	500,000,000	[9]	500,000,000
Effective Rate	2.45%	[9]	2.48%
Assets Pledged	1,623,000	[9]	10,674,000
Restricted Cash Pledged	0	[9]	0
Line of Credit Facility Two	'		'
Line Of Credit Facility [Line Items]	'		'
Maturity Date	'2018-12	[9]	'2018-12
Utilized Balance	0	[9]	'
Committed Amount	500,000,000	[9]	500,000,000
Effective Rate	0.25%	[9]	3.10%
Assets Pledged	0	[9]	0
Restricted Cash Pledged	0	[9]	0
Line Of Credit Facility Three	'		'
Line Of Credit Facility [Line Items]	'		'
Maturity Date	'2016-12	[9]	'2016-12
Utilized Balance	1,750,000,000	[9]	1,750,000,000
Committed Amount	1,750,000,000	[9]	1,750,000,000
Effective Rate	2.26%	[9]	2.09%
Assets Pledged	0	[9]	0
Restricted Cash Pledged	0	[9]	0
Line Of Credit Facility Four	'		'
Line Of Credit Facility [Line Items]	'		'
Maturity Date	'2018-12	[9]	'2018-12
Utilized Balance	750,000,000	[9]	1,400,000,000
Committed Amount	1,750,000,000	[9]	1,750,000,000
Effective Rate	2.59%	[9]	2.58%
Assets Pledged	187,555,000	[9]	93,969,000
Restricted Cash Pledged	0	[9]	0
Line of Credit Facility Five	'		'
Line Of Credit Facility [Line Items]	'		'
Maturity Date	'2017-03	[9]	'
Utilized Balance	300,000,000	[9]	'
Committed Amount	300,000,000	[9]	'
Effective Rate	1.70%	[9]	'
Assets Pledged	0	[9]	'
Restricted Cash Pledged	0	[9]	'
Total Facilities with Santander and Related Subsidiaries	'		'
Line Of Credit Facility [Line Items]	'		'
Utilized Balance	3,300,000,000	[9]	3,650,000,000
Committed Amount	4,800,000,000	[9]	4,500,000,000	[7],[8]
Assets Pledged	189,178,000	[9]	104,643,000
Restricted Cash Pledged	$0	[9]	$0
[1]	Notes payable — credit facilities — The carrying amount of notes payable related to revolving credit facilities is estimated to approximate fair value as of June 30, 2014 and December 31, 2013. Management believes that the terms of these credit agreements approximate market terms for similar credit agreements. The fair value of notes payable is considered a Level 3 measurement.
[2]	In July 2014, the maturity date of this facility was extended to June 2015.
[3]	Half of the outstanding balance on this facility matures in March 2015 and half in March 2016.
[4]	This line is held exclusively for Chrysler Capital retail loan and lease financing, with lease financing comprising no more than 50% of the outstanding balance upon advance. In July 2014, the committed amount was reduced to $4.3 billion and the maturity date was extended to June 2016.
[5]	This line is held exclusively for unsecured consumer term loans.
[6]	The repurchase facility is also collateralized by securitization notes payable retained by the Company. No portion of this facility is unsecured. This facility has rolling 30-day and 90-day maturities.
[7]	This line is collateralized by residuals retained by the Company.
[8]	This line is collateralized by securitization notes payable retained by the Company.
[9]	These lines are also collateralized by securitization notes payable and residuals retained by the Company. As of June 30, 2014 and December 31, 2013, $1,569,930 and $1,123,354, respectively, of the aggregate outstanding balances on these facilities were unsecured.

Debt_Schedule_of_Credit_Facili1

Debt - Schedule of Credit Facilities (Parenthetical) (Details) (USD $)	Jun. 30, 2014		Dec. 31, 2013	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2014		Dec. 31, 2013	Jul. 31, 2014
				Unsecured Debt	Unsecured Debt	Line of Credit Warehouse Facility Three		Line of Credit Warehouse Facility Three	Subsequent Event
									Line of Credit Warehouse Facility Three
Line Of Credit Facility [Line Items]	'		'	'	'	'		'	'
Committed amount	$15,707,974,000		$15,273,673,000	'	'	$4,550,000,000	[1]	$4,550,000,000	$4,300,000,000	[1]
Utilized Balance	$7,762,950,000	[2]	$8,099,773,000	$1,569,930,000	$1,123,354,000	$1,318,088,000	[1]	$613,600,000	'
[1]	This line is held exclusively for Chrysler Capital retail loan and lease financing, with lease financing comprising no more than 50% of the outstanding balance upon advance. In July 2014, the committed amount was reduced to $4.3 billion and the maturity date was extended to June 2016.
[2]	Notes payable — credit facilities — The carrying amount of notes payable related to revolving credit facilities is estimated to approximate fair value as of June 30, 2014 and December 31, 2013. Management believes that the terms of these credit agreements approximate market terms for similar credit agreements. The fair value of notes payable is considered a Level 3 measurement.

Debt_Additional_Information_De

Debt - Additional Information (Details) (USD $)	3 Months Ended			6 Months Ended
	Jun. 30, 2014		Jun. 30, 2013	Jun. 30, 2014		Jun. 30, 2013	Dec. 31, 2013
Debt Instrument [Line Items]	'		'	'		'	'
Committed amount	$15,707,974,000		'	$15,707,974,000		'	$15,273,673,000
Private issuance notes secured with vehicle lease	1,433,658,000		'	1,433,658,000		'	'
Interest expense on secured structured financing	57,217,000		56,626,000	117,079,000		114,336,000	'
Maturity Year One	'		'	'		'	'
Debt Instrument [Line Items]	'		'	'		'	'
Debt term	'		'	'3 years		'	'
Credit facility maturity date	'		'	31-Dec-16		'	'
Maturity Year Two	'		'	'		'	'
Debt Instrument [Line Items]	'		'	'		'	'
Debt term	'		'	'5 years		'	'
Credit facility maturity date	'		'	31-Dec-18		'	'
Total Facilities with Santander and Related Subsidiaries	'		'	'		'	'
Debt Instrument [Line Items]	'		'	'		'	'
Committed amount	4,800,000,000	[1]	'	4,800,000,000	[1]	'	4,500,000,000	[2],[3]
Line of Credit Facility Five	'		'	'		'	'
Debt Instrument [Line Items]	'		'	'		'	'
Committed amount	$300,000,000	[1]	'	$300,000,000	[1]	'	'
[1]	These lines are also collateralized by securitization notes payable and residuals retained by the Company. As of June 30, 2014 and December 31, 2013, $1,569,930 and $1,123,354, respectively, of the aggregate outstanding balances on these facilities were unsecured.
[2]	This line is collateralized by residuals retained by the Company.
[3]	This line is collateralized by securitization notes payable retained by the Company.

Debt_Summary_of_Secured_Struct

Debt - Summary of Secured Structured Financings (Details) (USD $)	6 Months Ended		12 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014		Dec. 31, 2013
Debt Instrument [Line Items]	'		'
Balance	18,391,660	[1]	15,195,887
Notes payable — credit facilities, $3,300,000 and $3,650,000 to affiliates, respectively	7,762,950	[2]	8,099,773
Restricted Cash	103,287		89,118
Secured Structured Financings	'		'
Debt Instrument [Line Items]	'		'
Balance	18,391,660		15,195,887
Notes payable — credit facilities, $3,300,000 and $3,650,000 to affiliates, respectively	37,995,544		33,127,485
Collateral	23,487,790		19,133,315
Restricted Cash	1,509,767		1,280,881
Secured Structured Financings | 2010 Securitizations	'		'
Debt Instrument [Line Items]	'		'
Balance	333,148		632,251
Notes payable — credit facilities, $3,300,000 and $3,650,000 to affiliates, respectively	3,671,749		4,671,749
Collateral	641,669		1,143,435
Restricted Cash	142,992		205,190
Secured Structured Financings | 2010 Securitizations | Minimum	'		'
Debt Instrument [Line Items]	'		'
Original Estimated Maturity Dates	'2016-10		'2016-10
Initial Weighted Average Interest Rate	1.04%		1.04%
Secured Structured Financings | 2010 Securitizations | Maximum	'		'
Debt Instrument [Line Items]	'		'
Original Estimated Maturity Dates	'2017-11		'2017-11
Initial Weighted Average Interest Rate	1.44%		1.44%
Secured Structured Financings | 2011 Securitizations	'		'
Debt Instrument [Line Items]	'		'
Balance	653,968		1,218,208
Notes payable — credit facilities, $3,300,000 and $3,650,000 to affiliates, respectively	4,693,289		5,605,609
Collateral	1,038,660		1,634,220
Restricted Cash	157,307		195,854
Secured Structured Financings | 2011 Securitizations | Minimum	'		'
Debt Instrument [Line Items]	'		'
Original Estimated Maturity Dates	'2015-10		'2015-10
Initial Weighted Average Interest Rate	1.21%		1.21%
Secured Structured Financings | 2011 Securitizations | Maximum	'		'
Debt Instrument [Line Items]	'		'
Original Estimated Maturity Dates	'2017-09		'2017-09
Initial Weighted Average Interest Rate	2.80%		2.80%
Secured Structured Financings | 2012 Securitizations	'		'
Debt Instrument [Line Items]	'		'
Balance	3,088,855		4,061,127
Notes payable — credit facilities, $3,300,000 and $3,650,000 to affiliates, respectively	8,023,840		8,023,840
Collateral	3,899,764		5,013,135
Restricted Cash	355,658		383,677
Secured Structured Financings | 2012 Securitizations | Minimum	'		'
Debt Instrument [Line Items]	'		'
Original Estimated Maturity Dates	'2017-11		'2017-11
Initial Weighted Average Interest Rate	0.92%		0.92%
Secured Structured Financings | 2012 Securitizations | Maximum	'		'
Debt Instrument [Line Items]	'		'
Original Estimated Maturity Dates	'2018-12		'2018-12
Initial Weighted Average Interest Rate	1.68%		1.68%
Secured Structured Financings | 2013 Securitizations	'		'
Debt Instrument [Line Items]	'		'
Balance	4,338,610		5,503,580
Notes payable — credit facilities, $3,300,000 and $3,650,000 to affiliates, respectively	6,689,700		6,689,700
Collateral	5,295,330		6,465,840
Restricted Cash	348,040		351,160
Secured Structured Financings | 2013 Securitizations | Minimum	'		'
Debt Instrument [Line Items]	'		'
Original Estimated Maturity Dates	'2019-01		'2019-01
Initial Weighted Average Interest Rate	0.89%		0.89%
Secured Structured Financings | 2013 Securitizations | Maximum	'		'
Debt Instrument [Line Items]	'		'
Original Estimated Maturity Dates	'2021-01		'2021-01
Initial Weighted Average Interest Rate	1.59%		1.59%
Secured Structured Financings | 2014 Securitizations	'		'
Debt Instrument [Line Items]	'		'
Balance	3,706,441		'
Notes payable — credit facilities, $3,300,000 and $3,650,000 to affiliates, respectively	4,100,000		'
Collateral	4,385,840		'
Restricted Cash	236,269		'
Secured Structured Financings | 2014 Securitizations | Minimum	'		'
Debt Instrument [Line Items]	'		'
Original Estimated Maturity Dates	'2020-04		'
Initial Weighted Average Interest Rate	1.63%		'
Secured Structured Financings | 2014 Securitizations | Maximum	'		'
Debt Instrument [Line Items]	'		'
Original Estimated Maturity Dates	'2020-08		'
Initial Weighted Average Interest Rate	1.72%		'
Secured Structured Financings | Public Securitizations	'		'
Debt Instrument [Line Items]	'		'
Balance	12,121,022		11,415,166
Notes payable — credit facilities, $3,300,000 and $3,650,000 to affiliates, respectively	27,178,578		24,990,898
Collateral	15,261,263		14,256,630
Restricted Cash	1,240,266		1,135,881
Secured Structured Financings | 2010 Private Issuance	'		'
Debt Instrument [Line Items]	'		'
Balance	209,128		219,704
Notes payable — credit facilities, $3,300,000 and $3,650,000 to affiliates, respectively	516,000		516,000
Initial Weighted Average Interest Rate	1.29%		1.29%
Collateral	338,513		378,434
Restricted Cash	9,538		8,435
Secured Structured Financings | 2010 Private Issuance | Maximum	'		'
Debt Instrument [Line Items]	'		'
Original Estimated Maturity Dates	'2011-06		'2011-06
Secured Structured Financings | 2011 Private Issuances	'		'
Debt Instrument [Line Items]	'		'
Balance	1,222,065		662,138
Notes payable — credit facilities, $3,300,000 and $3,650,000 to affiliates, respectively	4,856,525		4,856,525
Collateral	1,652,724		908,304
Restricted Cash	56,942		36,449
Secured Structured Financings | 2011 Private Issuances | Minimum	'		'
Debt Instrument [Line Items]	'		'
Initial Weighted Average Interest Rate	1.46%		1.46%
Secured Structured Financings | 2011 Private Issuances | Maximum	'		'
Debt Instrument [Line Items]	'		'
Original Estimated Maturity Dates	'2018-12		'2018-12
Initial Weighted Average Interest Rate	1.80%		1.80%
Secured Structured Financings | 2012 Private Issuance	'		'
Debt Instrument [Line Items]	'		'
Balance	14,962		30,526
Notes payable — credit facilities, $3,300,000 and $3,650,000 to affiliates, respectively	70,308		70,308
Initial Weighted Average Interest Rate	1.07%		1.07%
Collateral	20,177		35,378
Restricted Cash	1,874		3,016
Secured Structured Financings | 2012 Private Issuance | Maximum	'		'
Debt Instrument [Line Items]	'		'
Original Estimated Maturity Dates	'2016-05		'2016-05
Secured Structured Financings | 2013 Private Issuance	'		'
Debt Instrument [Line Items]	'		'
Balance	2,411,661		2,868,353
Notes payable — credit facilities, $3,300,000 and $3,650,000 to affiliates, respectively	2,693,754		2,693,754
Collateral	3,249,917		3,554,569
Restricted Cash	89,031		97,100
Secured Structured Financings | 2013 Private Issuance | Minimum	'		'
Debt Instrument [Line Items]	'		'
Original Estimated Maturity Dates	'2018-09		'2018-09
Initial Weighted Average Interest Rate	1.13%		1.13%
Secured Structured Financings | 2013 Private Issuance | Maximum	'		'
Debt Instrument [Line Items]	'		'
Original Estimated Maturity Dates	'2020-09		'2020-09
Initial Weighted Average Interest Rate	1.38%		1.38%
Secured Structured Financings | 2014 Private Issuance	'		'
Debt Instrument [Line Items]	'		'
Balance	2,412,822		'
Notes payable — credit facilities, $3,300,000 and $3,650,000 to affiliates, respectively	2,680,379		'
Collateral	2,965,196		'
Restricted Cash	112,116		'
Secured Structured Financings | 2014 Private Issuance | Minimum	'		'
Debt Instrument [Line Items]	'		'
Original Estimated Maturity Dates	'2018-03		'
Initial Weighted Average Interest Rate	1.09%		'
Secured Structured Financings | 2014 Private Issuance | Maximum	'		'
Debt Instrument [Line Items]	'		'
Original Estimated Maturity Dates	'2021-08		'
Initial Weighted Average Interest Rate	1.85%		'
Secured Structured Financings | Privately Issued Amortizing Notes	'		'
Debt Instrument [Line Items]	'		'
Balance	6,270,638		3,780,721
Notes payable — credit facilities, $3,300,000 and $3,650,000 to affiliates, respectively	10,816,966		8,136,587
Collateral	8,226,527		4,876,685
Restricted Cash	269,501		145,000
[1]	Notes payable — secured structured financings — The estimated fair value of notes payable related to secured structured financings is calculated based on market quotes for the Company’s publicly traded debt and estimated market rates currently available from recent transactions involving similar debt with similar credit risks, and is considered a Level 2 measurement.
[2]	Notes payable — credit facilities — The carrying amount of notes payable related to revolving credit facilities is estimated to approximate fair value as of June 30, 2014 and December 31, 2013. Management believes that the terms of these credit agreements approximate market terms for similar credit agreements. The fair value of notes payable is considered a Level 3 measurement.

Variable_Interest_Entities_Sum

Variable Interest Entities - Summary of Assets and Liabilities Related to VIEs (Details) (USD $)	Jun. 30, 2014		Dec. 31, 2013
In Thousands, unless otherwise specified
Securitization Financial Asset For Which Transfer Is Accounted As Sale [Line Items]	'		'
Restricted cash	$2,007,946	[1]	$1,563,613
Retail installment contracts, net	21,444,601	[2]	20,219,609
Various other assets	493,187		410,305
Notes payable	7,762,950	[3]	8,099,773
Various other liabilities	88,681		102,163
Variable Interest Entities	'		'
Securitization Financial Asset For Which Transfer Is Accounted As Sale [Line Items]	'		'
Restricted cash	1,613,054		1,370,174
Retail installment contracts, net	21,020,328		19,166,392
Leased vehicles, net	3,567,546		2,023,433
Various other assets	901,100		541,469
Notes payable	26,297,908		23,810,950
Various other liabilities	$49,983		$25,682
[1]	Cash and cash equivalents and restricted cash — The carrying amount of cash and cash equivalents, including restricted cash, approximated fair value at June 30, 2014 and December 31, 2013, due to the short maturity of these instruments and is considered a Level 1 measurement.
[2]	Retail installment contracts held for investment — Retail installment contracts held for investment are carried at amortized cost, net of loan loss allowance. The estimated fair value is calculated based on estimated market rates for similar contracts with similar credit risks and is considered a Level 3 measurement.
[3]	Notes payable — credit facilities — The carrying amount of notes payable related to revolving credit facilities is estimated to approximate fair value as of June 30, 2014 and December 31, 2013. Management believes that the terms of these credit agreements approximate market terms for similar credit agreements. The fair value of notes payable is considered a Level 3 measurement.

Variable_Interest_Entities_Sum1

Variable Interest Entities - Summary of Cash Flows Received from On-Balance Sheet Securitization Trusts (Details) (USD $)	3 Months Ended				6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2014		Jun. 30, 2013
Servicing Asset At Amortized Value Additional Disclosures [Abstract]	'		'		'		'
Receivables securitized	$5,051,048		$1,317,633		$9,141,478		$4,121,367
Net proceeds from new securitizations	4,707,336	[1]	1,136,460	[1]	8,206,756	[1]	3,586,460	[1]
Cash received for servicing fees	157,698		107,848		306,257		209,436
Cash received upon release from reserved and restricted cash accounts	60		2,806		810		6,225
Net distributions from Trusts	384,093		431,723		710,812		759,290
Total cash received from securitization trusts	$5,249,187		$1,678,837		$9,224,635		$4,561,411
[1]	Includes additional advances on existing securitizations

Variable_Interest_Entities_Add

Variable Interest Entities - Additional Information (Details) (USD $)	3 Months Ended	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2014	Dec. 31, 2013
Securitization Financial Asset For Which Transfer Is Accounted As Sale [Line Items]	'	'	'
Gross retail installment contracts transferred	$24,344,700,000	$24,344,700,000	$21,935,874,000
Retail installment contracts gross	'	774,183,000	'
Gain on retail installment contracts	0	32,538,000	'
Chrysler Capital	'	'	'
Securitization Financial Asset For Which Transfer Is Accounted As Sale [Line Items]	'	'	'
Gross retail installment contracts transferred	$1,528,072,000	$1,528,072,000	$1,017,756,000

Derivative_Financial_Instrumen2

Derivative Financial Instruments - Summary of Underlying Notional Amounts and Aggregate Fair Values (Details) (USD $)	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Derivative [Line Items]	'	'	'
Notional	$14,619,274	'	$10,461,378
Total return swap	250,594	250,594	0
Interest Rate Swap | Designated as Cash Flow Hedges	'	'	'
Derivative [Line Items]	'	'	'
Notional	6,057,000	'	3,873,000
Fair Value	-7,592	'	-5,686
Interest Rate Swap | Not Designated As Hedges	'	'	'
Derivative [Line Items]	'	'	'
Notional	2,841,861	'	3,444,459
Fair Value	-23,041	'	-31,360
Interest Rate Cap	'	'	'
Derivative [Line Items]	'	'	'
Notional	6,398,207	'	4,616,960
Fair Value	46,631	'	28,274
Options for Interest Rate Cap	'	'	'
Derivative [Line Items]	'	'	'
Notional	6,398,207	'	4,616,960
Fair Value	($46,677)	'	($28,389)

Derivative_Financial_Instrumen3

Derivative Financial Instruments - Additional Information (Details) (USD $)	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Jun. 30, 2014	Dec. 31, 2013	Mar. 31, 2014
				Warrant	Warrant	Three-Month LIBOR
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]	'	'	'	'	'	'
Company pledged bonds retained in its own securitizations in exchange	$250,594,000	$250,594,000	$0	'	'	'
Variable rate of three-month LIBOR plus basis points	'	'	'	'	'	0.75%
Estimated fair value of warrant	'	'	'	$0	$0	'

Derivative_Financial_Instrumen4

Derivative Financial Instruments - Offsetting of Derivative Assets and Liabilities (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Derivative Assets Subject to Master Netting Arrangement	'	'
Derivatives Fair Value [Line Items]	'	'
Gross Amounts of Recognized Assets	$47,168	$29,875
Gross Amounts Offset in the Consolidated Balance Sheet	0	0
Net Amounts of Assets Presented in the Consolidated Balance Sheet	47,168	29,875
Financial Instruments, Not Offset in the Consolidated Balance Sheet	0	0
Cash Collateral Received, Not Offset in the Consolidated Balance Sheet	0	0
Net Amount, Not Offset in the Consolidated Balance Sheet	47,168	29,875
Derivative Assets Not Subject to Master Netting Arrangement	'	'
Derivatives Fair Value [Line Items]	'	'
Gross Amounts of Recognized Assets	0	0
Gross Amounts Offset in the Consolidated Balance Sheet	0	0
Net Amounts of Assets Presented in the Consolidated Balance Sheet	0	0
Financial Instruments, Not Offset in the Consolidated Balance Sheet	0	0
Cash Collateral Received, Not Offset in the Consolidated Balance Sheet	0	0
Net Amount, Not Offset in the Consolidated Balance Sheet	0	0
Derivative Assets	'	'
Derivatives Fair Value [Line Items]	'	'
Gross Amounts of Recognized Assets	47,168	29,875
Gross Amounts Offset in the Consolidated Balance Sheet	0	0
Net Amounts of Assets Presented in the Consolidated Balance Sheet	47,168	29,875
Financial Instruments, Not Offset in the Consolidated Balance Sheet	0	0
Cash Collateral Received, Not Offset in the Consolidated Balance Sheet	0	0
Net Amount, Not Offset in the Consolidated Balance Sheet	47,168	29,875
Financial Assets	'	'
Derivatives Fair Value [Line Items]	'	'
Gross Amounts of Recognized Assets	47,168	29,875
Gross Amounts Offset in the Consolidated Balance Sheet	0	0
Net Amounts of Assets Presented in the Consolidated Balance Sheet	47,168	29,875
Financial Instruments, Not Offset in the Consolidated Balance Sheet	0	0
Cash Collateral Received, Not Offset in the Consolidated Balance Sheet	0	0
Net Amount, Not Offset in the Consolidated Balance Sheet	47,168	29,875
Derivative Liabilities Subject to Master Netting Arrangement	'	'
Derivatives Fair Value [Line Items]	'	'
Gross Amounts of Recognized Liabilities	77,846	67,036
Gross Amounts Offset in the Consolidated Balance Sheet	-55,457	-27,020
Net Amounts of Liabilities Presented in the Consolidated Balance Sheet	22,389	40,016
Financial Instruments, Not Offset in the Consolidated Balance Sheet	0	0
Cash Collateral Pledged, Not Offset in the Consolidated Balance Sheet	0	0
Net Amount, Not Offset in the Consolidated Balance Sheet	22,389	40,016
Derivative Liabilities Not Subject to Master Netting Arrangement	'	'
Derivatives Fair Value [Line Items]	'	'
Gross Amounts of Recognized Liabilities	0	0
Gross Amounts Offset in the Consolidated Balance Sheet	0	0
Net Amounts of Liabilities Presented in the Consolidated Balance Sheet	0	0
Financial Instruments, Not Offset in the Consolidated Balance Sheet	0	0
Cash Collateral Pledged, Not Offset in the Consolidated Balance Sheet	0	0
Net Amount, Not Offset in the Consolidated Balance Sheet	0	0
Derivative Liabilities	'	'
Derivatives Fair Value [Line Items]	'	'
Gross Amounts of Recognized Liabilities	77,846	67,036
Gross Amounts Offset in the Consolidated Balance Sheet	-55,457	-27,020
Net Amounts of Liabilities Presented in the Consolidated Balance Sheet	22,389	40,016
Financial Instruments, Not Offset in the Consolidated Balance Sheet	0	0
Cash Collateral Pledged, Not Offset in the Consolidated Balance Sheet	0	0
Net Amount, Not Offset in the Consolidated Balance Sheet	22,389	40,016
Financial Liabilities	'	'
Derivatives Fair Value [Line Items]	'	'
Gross Amounts of Recognized Liabilities	77,846	67,036
Gross Amounts Offset in the Consolidated Balance Sheet	-55,457	-27,020
Net Amounts of Liabilities Presented in the Consolidated Balance Sheet	22,389	40,016
Financial Instruments, Not Offset in the Consolidated Balance Sheet	0	0
Cash Collateral Pledged, Not Offset in the Consolidated Balance Sheet	0	0
Net Amount, Not Offset in the Consolidated Balance Sheet	22,389	40,016
Santander & Affiliates | Interest Rate Swaps	'	'
Derivatives Fair Value [Line Items]	'	'
Gross Amounts of Recognized Assets	537	1,601
Gross Amounts Offset in the Consolidated Balance Sheet	0	0
Net Amounts of Assets Presented in the Consolidated Balance Sheet	537	1,601
Financial Instruments, Not Offset in the Consolidated Balance Sheet	0	0
Cash Collateral Received, Not Offset in the Consolidated Balance Sheet	0	0
Net Amount, Not Offset in the Consolidated Balance Sheet	537	1,601
Gross Amounts of Recognized Liabilities	31,169	38,647
Gross Amounts Offset in the Consolidated Balance Sheet	-9,612	-2,258
Net Amounts of Liabilities Presented in the Consolidated Balance Sheet	21,557	36,389
Financial Instruments, Not Offset in the Consolidated Balance Sheet	0	0
Cash Collateral Pledged, Not Offset in the Consolidated Balance Sheet	0	0
Net Amount, Not Offset in the Consolidated Balance Sheet	21,557	36,389
Santander & Affiliates | Interest Rate Caps	'	'
Derivatives Fair Value [Line Items]	'	'
Gross Amounts of Recognized Assets	33,201	9,342
Gross Amounts Offset in the Consolidated Balance Sheet	0	0
Net Amounts of Assets Presented in the Consolidated Balance Sheet	33,201	9,342
Financial Instruments, Not Offset in the Consolidated Balance Sheet	0	0
Cash Collateral Received, Not Offset in the Consolidated Balance Sheet	0	0
Net Amount, Not Offset in the Consolidated Balance Sheet	33,201	9,342
Santander & Affiliates | Back to Back	'	'
Derivatives Fair Value [Line Items]	'	'
Gross Amounts of Recognized Liabilities	33,201	9,342
Gross Amounts Offset in the Consolidated Balance Sheet	-32,369	-9,342
Net Amounts of Liabilities Presented in the Consolidated Balance Sheet	832	0
Financial Instruments, Not Offset in the Consolidated Balance Sheet	0	0
Cash Collateral Pledged, Not Offset in the Consolidated Balance Sheet	0	0
Net Amount, Not Offset in the Consolidated Balance Sheet	832	0
Third Party | Interest Rate Caps	'	'
Derivatives Fair Value [Line Items]	'	'
Gross Amounts of Recognized Assets	13,430	18,932
Gross Amounts Offset in the Consolidated Balance Sheet	0	0
Net Amounts of Assets Presented in the Consolidated Balance Sheet	13,430	18,932
Financial Instruments, Not Offset in the Consolidated Balance Sheet	0	0
Cash Collateral Received, Not Offset in the Consolidated Balance Sheet	0	0
Net Amount, Not Offset in the Consolidated Balance Sheet	13,430	18,932
Third Party | Back to Back	'	'
Derivatives Fair Value [Line Items]	'	'
Gross Amounts of Recognized Liabilities	13,476	19,047
Gross Amounts Offset in the Consolidated Balance Sheet	-13,476	-15,420
Net Amounts of Liabilities Presented in the Consolidated Balance Sheet	0	3,627
Financial Instruments, Not Offset in the Consolidated Balance Sheet	0	0
Cash Collateral Pledged, Not Offset in the Consolidated Balance Sheet	0	0
Net Amount, Not Offset in the Consolidated Balance Sheet	$0	$3,627

Derivative_Financial_Instrumen5

Derivative Financial Instruments - Gross Gains (Losses) Reclassified from Accumulated Other Comprehensive Income (Details) (Interest Rate Swap, USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Designated as Cash Flow Hedges	'	'	'	'
Derivative Instruments Gain Loss [Line Items]	'	'	'	'
Gross Gains (Losses) Recognized in Interest Expense	($47)	$0	$91	$0
Gross Gains (Losses) Recognized in Accumulated Other Comprehensive Income	-7,246	-1,155	-6,592	-1,660
Gross Gains (Losses) Reclassified From Accumulated Other Comprehensive Income to Interest Expense	-1,931	-4,444	-4,595	-9,439
Not Designated As Hedges	'	'	'	'
Derivative Instruments Gain Loss [Line Items]	'	'	'	'
Gross Gains (Losses) Recognized in Interest Expense	$3,199	$10,682	$8,388	$17,339

Other_Assets_Other_Assets_Deta

Other Assets - Other Assets (Details) (USD $)	Jun. 30, 2014		Dec. 31, 2013
In Thousands, unless otherwise specified
Other Assets [Line Items]	'		'
Other assets	$493,187		$410,305
Upfront Fee	'		'
Other Assets [Line Items]	'		'
Other assets	132,500	[1]	140,000	[1]
Inventory of Repossessed Vehicles	'		'
Other Assets [Line Items]	'		'
Other assets	140,792		129,323
Manufacturer Subvention Payments Receivable	'		'
Other Assets [Line Items]	'		'
Other assets	73,240	[1]	55,579	[1]
Derivative Assets	'		'
Other Assets [Line Items]	'		'
Other assets	47,168		29,875
Indemnification Payments Receivable	'		'
Other Assets [Line Items]	'		'
Other assets	8,603	[2]	8,603	[2]
Other	'		'
Other Assets [Line Items]	'		'
Other assets	$90,884		$46,925
[1]	These amounts relate to the Chrysler agreement. The Company paid a $150,000 upfront fee at the effective date of the agreement. This fee is being amortized into finance and other interest income over the ten-year term of the agreement. As the preferred financing provider for Chrysler, the Company is entitled to subvention payments on loans and leases with below-market customer payments.
[2]	This amount represents tax indemnification payments to the original equity investors in two investment partnerships now owned by the Company. These payments are expected to be recovered through tax refunds passed through to the Company as the original investors recognize losses related to the investments.

Other_Assets_Other_Assets_Pare

Other Assets - Other Assets (Parenthetical) (Details) (USD $)	6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013
Other Assets [Abstract]	'	'
Upfront fee	$0	$150,000
Finance and other interest income amortization period	'10 years	'

Income_Taxes_Additional_Inform

Income Taxes - Additional Information (Details) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Income Tax Disclosure [Abstract]	'	'	'	'
Income tax expense	$143,643	$104,129	$191,684	$256,927
Effective tax rate	36.80%	36.50%	36.90%	35.30%

Commitments_and_Contingencies_

Commitments and Contingencies - Additional Information (Details) (USD $)	3 Months Ended		6 Months Ended		12 Months Ended	6 Months Ended			1 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013	Jun. 30, 2014	Jun. 30, 2014	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Dec. 31, 2013
						Jul-15	Jul-17	CBP	SBNA	SBNA	SBNA
Contingencies And Commitments [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Repurchase of outstanding	$0	'	$0	'	'	'	'	'	'	'	'
Letter of credit facility	'	'	500,000,000	'	500,000,000	'	'	'	'	'	'
Letter of credit facility issued	0	'	0	'	0	'	'	'	'	'	'
Expiration of letter of credit facility commitments	'	'	31-Dec-14	'	'	'	'	'	'	'	'
Unsecured revolving financing Initial term ending	'	'	30-Apr-20	'	'	'	'	'	'	'	'
Commitment to sell loans	300,000,000	'	300,000,000	'	'	'	'	'	'	'	'
Commitment to sell loans maturity Period	'	'	31-May-18	'	'	'	'	'	'	'	'
Loans servicing, loss-sharing payment ratio	'	'	'	'	'	'	'	0.50%	'	'	'
Referral fee	'	'	'	'	'	'	'	'	9,000,000	'	'
Loan	'	'	'	'	'	'	'	'	'	456,006,000	202,494,000
Servicing fees adjustment	1,329,000	0	3,249,000	0	'	'	'	'	'	'	'
Indemnification of leases	'	'	'	'	'	'	'	'	'	48,226,000	'
Purchase commitment	'	'	'Under terms of the new agreements, the Company has committed to purchase at least the lesser of $30,000 per month or 75% of the lending platform company’s near-prime originations through July 2015, and the lesser of $30,000 per month or 50% of the lending platform company’s near-prime originations thereafter through July 2017.	'	'	'	'	'	'	'	'
Purchase commitment amount	'	'	'	'	'	$30,000,000	$30,000,000	'	'	'	'
Purchase commitment percent	'	'	'	'	'	75.00%	50.00%	'	'	'	'
Purchase commitment notice period	'	'	'90 days	'	'	'	'	'	'	'	'

RelatedParty_Transactions_Addi

Related-Party Transactions - Additional Information (Details) (USD $)

3 Months Ended

6 Months Ended

3 Months Ended

6 Months Ended

12 Months Ended

3 Months Ended

6 Months Ended

0 Months Ended

3 Months Ended

6 Months Ended

3 Months Ended

6 Months Ended

3 Months Ended

6 Months Ended

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

Jun. 30, 2013

Jun. 30, 2014

Jun. 30, 2013

Dec. 31, 2013

Jun. 30, 2014

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Jun. 30, 2014

Jun. 27, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 27, 2014

Jun. 30, 2014

Jun. 30, 2013

Jun. 30, 2014

Jun. 30, 2013

Jun. 30, 2014

Jun. 30, 2013

Jun. 30, 2014

Jun. 30, 2013

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2013

Jun. 30, 2014

Jun. 30, 2013

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Oct. 21, 2013

Jun. 30, 2014

Jun. 30, 2014

Dealer Loan Portfolio

Dealer Loan Portfolio

Dealer Loan Portfolio

SHUSA

SHUSA

SBNA

SBNA

SBNA

SBNA

SBNA

SBNA

SBNA

SBNA

Produban Servicios Informaticos Generales S.L

Produban Servicios Informaticos Generales S.L

Produban Servicios Informaticos Generales S.L

Produban Servicios Informaticos Generales S.L

Cost Method Investment

Cost Method Investment

Former Managing Member

Former Managing Member

Former Managing Member

Former Managing Member

Chairman and CEO

Chairman and CEO

Chairman and CEO, President and CFO and Board Member

Chairman and CEO, President and CFO and Board Member

Chairman and CEO, President and CFO and Board Member

Chairman and CEO, President and CFO and Board Member

Serviced Auto Loan and Retail Installment

Serviced Auto Loan and Retail Installment

Serviced Auto Loan and Retail Installment

Serviced Auto Loan and Retail Installment

Expenses Paid for Use of CEO Private Plane

Expenses Paid for Use of CEO Private Plane

sqft

Rent Expense

Rent Expense

Class of Stock [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Interest expense on line of credit

$22,709,000

$13,957,000

$47,583,000

$20,451,000

'

'

'

'

$1,299,000

$1,662,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Accrued interest expense on line of credit

6,146,000

'

6,146,000

'

11,435,000

'

'

'

213,000

213,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Letter of credit fees

126,000

144,000

251,000

270,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Accrued fees on letter of credit

126,000

'

126,000

'

128,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Notional

14,619,274,000

'

14,619,274,000

'

10,461,378,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Derivative instrument interest expenses

12,702,000

1,289,000

21,583,000

6,163,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Receivables sold

'

'

'

'

'

'

'

222,384,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Servicing fee income on receivables sold

'

'

'

'

'

3,033,000

4,298,000

'

'

'

'

'

'

'

5,784,000

3,157,000

6,649,000

9,371,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Servicing fees receivables

'

'

'

'

'

1,259,000

1,723,000

'

'

'

'

6,937,000

10,622,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Leased vehicles, net

3,567,546,000

'

3,567,546,000

'

2,023,433,000

'

'

'

'

'

'

'

'

369,114,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Leased vehicles, net

'

'

'

'

'

'

'

'

'

'

'

'

'

317,275,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Proceeds from sale

'

'

'

'

'

'

'

'

'

'

322,851,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Total gain from sale

'

'

'

'

'

'

'

'

'

'

5,576,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Servicing fee income

22,099,000

6,355,000

32,504,000

13,626,000

'

'

'

'

'

'

'

535,000

629,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Credit loss indemnification of leases

'

'

'

'

'

'

'

'

'

'

'

48,226,000

48,226,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Expenses incurred

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

22,000

22,000

75,000

75,000

'

'

'

'

'

'

'

'

'

'

'

'

Origination in unsecured revolving loans

'

'

87,217,000

283,406,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

2,207,000

2,911,000

'

'

'

'

'

'

'

'

'

'

Reimbursed expenses

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0

97,000

0

478,000

'

'

'

'

'

'

Related party, amount of transaction

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

141,000

414,000

'

'

54,000

108,000

Average hourly rate (in usd per hour)

'

'

5,800

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Area of leased property (in square foot)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

373,000

'

'

Lease term

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'12 years

'

'

'

Future minimum payment of lease

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$83,555,000

'

'

'

RelatedParty_Transactions_Info

Related-Party Transactions - Information on Dealer Loan Portfolio (Details) (Dealer Loan Portfolio, USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Dealer Loan Portfolio	'	'
Related Party Transaction [Line Items]	'	'
Total serviced portfolio	$764,869	$513,684
Cash collections due to owner, net	10,930	6,941
Servicing fees receivable	$1,676	$817

RelatedParty_Transactions_Info1

Related-Party Transactions - Information on Serviced Auto Loan and Retail Installment Contract Portfolio (Details) (Serviced Auto Loan and Retail Installment, USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Serviced Auto Loan and Retail Installment	'	'
Related Party Transaction [Line Items]	'	'
Total serviced portfolio	$1,017,002	$1,175,566
Cash collections due to owner	30,522	32,831
Servicing fees receivable (refundable)	$2,566	($3,163)

RelatedParty_Transactions_Info2

Related-Party Transactions - Information on Consumer Vehicle Lease Portfolio Portfolio (Details) (Consumer Vehicle Lease, USD $)	Jun. 30, 2014
In Thousands, unless otherwise specified
Consumer Vehicle Lease	'
Related Party Transaction [Line Items]	'
Total serviced portfolio	$1,077,111
Cash collections due to owner	6,055
Origination and servicing fees receivable	$2,499

Computation_of_Basic_and_Dilut2

Computation of Basic and Diluted Earnings per Common Share - Additional Information (Details)	3 Months Ended	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2014
Earnings Per Share [Abstract]	'	'
Employee stock option awards excluded from computation of earnings per share, amount	1,539,861	1,308,177

Computation_of_Basic_and_Dilut3

Computation of Basic and Diluted Earnings per Common Share - Summary of Computation of Basic and Diluted Earnings per Common Share (Details) (USD $)	3 Months Ended		6 Months Ended
In Thousands, except Share data, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Earnings per common share	'	'	'	'
Net income attributable to SCUSA	$246,481	$181,918	$327,947	$472,320
Weighted average number of common shares outstanding before restricted participating shares	348,243,007	346,171,491	347,881,776	346,168,144
Weighted average number of participating restricted common shares outstanding	583,890	0	583,890	0
Weighted average number of common shares outstanding	348,826,897	346,171,491	348,465,666	346,168,144
Earnings per common share (in usd per share)	$0.71	$0.53	$0.94	$1.36
Earnings per common share - assuming dilution	'	'	'	'
Net income attributable to SCUSA	$246,481	$181,918	$327,947	$472,320
Weighted average number of common shares outstanding	348,826,897	346,171,491	348,465,666	346,168,144
Effect of employee stock-based awards (in shares)	7,555,024	0	7,542,622	0
Weighted average number of common shares outstanding - assuming dilution	356,381,921	346,171,491	356,008,288	346,168,144
Earnings per common share - assuming dilution (in usd per share)	$0.69	$0.53	$0.92	$1.36

Fair_Value_of_Financial_Instru2

Fair Value of Financial Instruments - Summary of Fair Value Estimates, Methods and Assumptions (Details) (USD $)	Jun. 30, 2014		Dec. 31, 2013		Jun. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]	'		'		'	'
Cash and cash equivalents	$45,913	[1]	$10,531		$1,118	$70,887
Receivables held for sale	123,791	[2]	82,503		'	'
Retail installment contracts held for investment, net	21,444,601	[3]	20,219,609		'	'
Unsecured consumer loans, net	1,233,637	[4]	954,189		'	'
Receivables from dealers held for investment	85,194	[5]	94,745		'	'
Restricted cash	2,007,946	[1]	1,563,613		'	'
Notes payable — credit facilities	7,762,950	[6]	8,099,773		'	'
Notes payable — secured structured financings	18,391,660	[7]	15,195,887		'	'
Carrying Value	'		'		'	'
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]	'		'		'	'
Cash and cash equivalents	45,913	[1]	10,531	[1]	'	'
Receivables held for sale	123,791	[2]	82,503	[2]	'	'
Retail installment contracts held for investment, net	21,444,601	[3]	20,219,609	[3]	'	'
Unsecured consumer loans, net	1,233,637	[4]	954,189	[4]	'	'
Receivables from dealers held for investment	85,194	[5]	94,745	[5]	'	'
Restricted cash	2,007,946	[1]	1,563,613	[1]	'	'
Notes payable — credit facilities	7,762,950	[6]	8,099,773	[6]	'	'
Notes payable — secured structured financings	18,391,660	[7]	15,195,887	[7]	'	'
Estimated Fair Value	'		'		'	'
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]	'		'		'	'
Cash and cash equivalents	45,913	[1]	10,531	[1]	'	'
Receivables held for sale	124,120	[2]	83,344	[2]	'	'
Retail installment contracts held for investment, net	21,961,413	[3]	21,465,236	[3]	'	'
Unsecured consumer loans, net	1,321,051	[4]	1,187,286	[4]	'	'
Receivables from dealers held for investment	85,194	[5]	94,745	[5]	'	'
Restricted cash	2,007,946	[1]	1,563,613	[1]	'	'
Notes payable — credit facilities	7,762,950	[6]	8,099,773	[6]	'	'
Notes payable — secured structured financings	$18,544,914	[7]	$15,565,013	[7]	'	'
[1]	Cash and cash equivalents and restricted cash — The carrying amount of cash and cash equivalents, including restricted cash, approximated fair value at June 30, 2014 and December 31, 2013, due to the short maturity of these instruments and is considered a Level 1 measurement.
[2]	Receivables held for sale — Receivables held for sale are carried at the lower of cost or market, as determined on an aggregate basis. The estimated fair value is based on the prices obtained or expected to be obtained in the subsequent sales and is considered a Level 2 measurement.
[3]	Retail installment contracts held for investment — Retail installment contracts held for investment are carried at amortized cost, net of loan loss allowance. The estimated fair value is calculated based on estimated market rates for similar contracts with similar credit risks and is considered a Level 3 measurement.
[4]	Unsecured consumer loans, net — Unsecured consumer loans are carried at amortized cost, net of loan loss allowance. Carrying value approximates fair value for unsecured revolving loans because the loans are short term in duration, do not have a defined maturity date and/or are at a market-based interest rate. For unsecured amortizing loans, the estimated fair value is calculated based on estimated market rates for similar loans with similar credit risks and is considered a level 3 measurement.
[5]	Receivables from dealers, held for investment, net — Receivables from dealers held for investment are carried at amortized cost, net of loan loss allowance. The estimated fair value is calculated based on estimated market rates for similar receivables with similar credit risks and is considered a Level 3 measurement.
[6]	Notes payable — credit facilities — The carrying amount of notes payable related to revolving credit facilities is estimated to approximate fair value as of June 30, 2014 and December 31, 2013. Management believes that the terms of these credit agreements approximate market terms for similar credit agreements. The fair value of notes payable is considered a Level 3 measurement.
[7]	Notes payable — secured structured financings — The estimated fair value of notes payable related to secured structured financings is calculated based on market quotes for the Company’s publicly traded debt and estimated market rates currently available from recent transactions involving similar debt with similar credit risks, and is considered a Level 2 measurement.

Fair_Value_of_Financial_Instru3

Fair Value of Financial Instruments - Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) (USD $)	Jun. 30, 2014		Dec. 31, 2013
In Thousands, unless otherwise specified
Total Return Swap	'		'
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]	'		'
Liabilities	$0	[1]	'
Total Return Swap | Quoted Prices in Active Markets for Identical Assets (Level 1)	'		'
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]	'		'
Liabilities	0	[1]	'
Total Return Swap | Significant Other Observable Inputs (Level 2)	'		'
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]	'		'
Liabilities	0	[1]	'
Total Return Swap | Significant Unobservable Inputs (Level 3)	'		'
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]	'		'
Liabilities	0	[1]	'
Designated as Cash Flow Hedges	'		'
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]	'		'
Assets	537	[2]	1,601	[2]
Liabilities	8,129	[2]	7,287	[2]
Designated as Cash Flow Hedges | Quoted Prices in Active Markets for Identical Assets (Level 1)	'		'
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]	'		'
Assets	0	[2]	0	[2]
Liabilities	0	[2]	0	[2]
Designated as Cash Flow Hedges | Significant Other Observable Inputs (Level 2)	'		'
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]	'		'
Assets	537	[2]	1,601	[2]
Liabilities	8,129	[2]	7,287	[2]
Designated as Cash Flow Hedges | Significant Unobservable Inputs (Level 3)	'		'
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]	'		'
Assets	0	[2]	0	[2]
Liabilities	0	[2]	0	[2]
Interest Rate Caps	'		'
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]	'		'
Assets	46,631	[2]	28,274	[2]
Interest Rate Caps | Quoted Prices in Active Markets for Identical Assets (Level 1)	'		'
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]	'		'
Assets	0	[2]	0	[2]
Interest Rate Caps | Significant Other Observable Inputs (Level 2)	'		'
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]	'		'
Assets	46,631	[2]	28,274	[2]
Interest Rate Caps | Significant Unobservable Inputs (Level 3)	'		'
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]	'		'
Assets	0	[2]	0	[2]
Interest Rate Swaps	'		'
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]	'		'
Assets	0	[2]	'
Liabilities	23,041	[2]	31,360	[2]
Interest Rate Swaps | Quoted Prices in Active Markets for Identical Assets (Level 1)	'		'
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]	'		'
Assets	0	[2]	'
Liabilities	0	[2]	0	[2]
Interest Rate Swaps | Significant Other Observable Inputs (Level 2)	'		'
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]	'		'
Assets	0	[2]	'
Liabilities	23,041	[2]	31,360	[2]
Interest Rate Swaps | Significant Unobservable Inputs (Level 3)	'		'
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]	'		'
Assets	0	[2]	'
Liabilities	0	[2]	0	[2]
Trading Options for Interest Rate Caps	'		'
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]	'		'
Liabilities	46,677	[2]	28,389	[2]
Trading Options for Interest Rate Caps | Quoted Prices in Active Markets for Identical Assets (Level 1)	'		'
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]	'		'
Liabilities	0	[2]	0	[2]
Trading Options for Interest Rate Caps | Significant Other Observable Inputs (Level 2)	'		'
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]	'		'
Liabilities	46,677	[2]	28,389	[2]
Trading Options for Interest Rate Caps | Significant Unobservable Inputs (Level 3)	'		'
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]	'		'
Liabilities	$0	[2]	$0	[2]
[1]	The total return swap is valued based on the estimated market value of the underlying bonds pledged to the associated credit facility.
[2]	The valuation of swaps and caps is determined using widely accepted valuation techniques including discounted cash flow analysis on the expected cash flows of each derivative. This analysis reflects the contractual terms of the derivative, including the period to maturity, and uses observable market-based inputs. The Company incorporates credit valuation adjustments to appropriately reflect both its own nonperformance risk and the respective counterparty’s nonperformance risk in the fair value measurement of its derivatives. In adjusting the fair value of its derivative contracts for the effect of nonperformance risk, the Company has considered the impact of netting and any applicable credit enhancements, such as collateral postings and guarantees. The Company utilizes the exception in ASC 820-10-35-18D (commonly referred to as the “portfolio exception”) with respect to measuring counterparty credit risk for instruments (Note 7).

Fair_Value_of_Financial_Instru4

Fair Value of Financial Instruments - Assets and Liabilities Measured at Fair Value on Nonrecurring Basis (Details) (Inventory of Repossessed Vehicles, USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]	'	'
Assets — repossessed vehicle inventory	$140,792	$129,323
Quoted Prices in Active Markets for Identical Assets (Level 1)	'	'
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]	'	'
Assets — repossessed vehicle inventory	0	0
Significant Other Observable Inputs (Level 2)	'	'
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]	'	'
Assets — repossessed vehicle inventory	140,792	129,323
Significant Unobservable Inputs (Level 3)	'	'
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]	'	'
Assets — repossessed vehicle inventory	$0	$0

Employee_Benefit_Plans_Additio

Employee Benefit Plans - Additional Information (Details) (USD $)	0 Months Ended	6 Months Ended	12 Months Ended			0 Months Ended		6 Months Ended
In Thousands, except Share data, unless otherwise specified	Jan. 23, 2014	Jun. 30, 2014	Dec. 31, 2011	Jan. 23, 2014	Dec. 31, 2013	Jan. 23, 2014	Jan. 23, 2014	Jun. 30, 2014	Dec. 28, 2013
						Employees	Director	Omnibus Incentive Plan	Omnibus Incentive Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]	'	'	'	'	'	'	'	'	'
Common shares stock awards available for grant	'	'	29,000,000	'	'	'	'	583,890	'
Percentage of equity invested in the Company for the stock awards available for grant	'	'	8.50%	'	'	'	'	'	'
Expiration period	'	'10 years	'	'	'	'	'	'	'
Common stock , shares issued	'	348,931,490	'	85,242,042	346,763,261	'	'	'	5,192,640
Stock vesting period	'	'	'	'	'	'5 years	'3 years	'5 years	'
Employee benefits and share-based compensation	'	'	'	'	'	'	'	$1,216	'
Common stock , par value (in usd per share)	'	$0.01	'	$24	$0.01	'	'	'	'
Stock compensation expense	117,770	'	'	'	'	'	'	'	'
Share-based compensation to executives	33,845	'	'	'	'	'	'	'	'
Fair value of options granted in period	$10,216	'	'	'	'	'	'	'	'

Employee_Benefit_Plans_Summary

Employee Benefit Plans - Summary of Stock Options and Related Activity (Details) (USD $)	6 Months Ended	12 Months Ended
	Jun. 30, 2014	Dec. 31, 2013
Options outstanding, shares	'	'
Options outstanding, Beginning balance (in shares)	23,910,062	'
Granted (in shares)	1,539,861	'
Exercised (in shares)	-2,977,250	'
Expired (in shares)	0	'
Forfeited (in shares)	-722,634	'
Options outstanding, Ending balance (in shares)	21,750,039	23,910,062
Options exercisable, Ending balance (in shares)	15,620,920	'
Options Outstanding, Weighted Average Exercise Price	'	'
Options outstanding, weighted average exercise price, Beginning balance (in usd per share)	$9.81	'
Granted (in usd per share)	$23.94	'
Exercised (in usd per share)	$9.55	'
Expired (in usd per share)	$0	'
Forfeited (in usd per share)	($12.36)	'
Options outstanding, Weighted average exercise price, Ending balance (in usd per share)	$10.76	$9.81
Options exercisable, Weighted average exercise price, Ending balance (in usd per share)	$9.87	'
Weighted-Average Remaining Contractual Term (Years)	'	'
Options outstanding, weighted average remaining contractual term (Years)	'7 years 8 months	'8 years
Options exercisable, weighted average remaining contractual term (Years)	'7 years 6 months	'
Aggregate Intrinsic Value	'	'
Aggregate intrinsic value, Exercised	($43,836)	'
Options outstanding, aggregate intrinsic value	188,766	'
Options exercisable, aggregate intrinsic value	$149,421	'

Shareholders_Equity_Treasury_S

Shareholders' Equity - Treasury Stock (Details)	Jun. 30, 2014	Dec. 31, 2013
Equity [Abstract]	'	'
Treasury stock shares	3,154	3,154

Shareholders_Equity_Summary_of

Shareholders' Equity - Summary of Changes in Accumulated Other Comprehensive Loss (Details) (USD $)	3 Months Ended				6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2014		Jun. 30, 2013
Increase (Decrease) in Accumulated Other Comprehensive Loss [Roll Forward]	'		'		'		'
Beginning balance	($765)		($7,786)		($2,853)		($9,164)
Other comprehensive income (loss) before reclassifications	-4,579		-1,691		-4,167		-3,145
Amounts reclassified out of accumulated other comprehensive income (loss)	1,215	[1]	2,525	[1]	2,891	[1]	5,357	[1]
Ending balance	-4,129		-6,952		-4,129		-6,952
Unrealized Gains (Losses) on Cash Flow Hedges	'		'		'		'
Increase (Decrease) in Accumulated Other Comprehensive Loss [Roll Forward]	'		'		'		'
Beginning balance	-765	[2]	-9,582	[2]	-2,853	[2]	-12,416	[2]
Other comprehensive income (loss) before reclassifications	-4,579	[2]	-804	[2]	-4,167	[2]	-1,123	[2]
Amounts reclassified out of accumulated other comprehensive income (loss)	1,215	[1],[2]	2,804	[1],[2]	2,891	[1],[2]	5,957	[1],[2]
Ending balance	-4,129	[2]	-7,582	[2]	-4,129	[2]	-7,582	[2]
Unrealized Gains (Losses) on Investments Available for Sale	'		'		'		'
Increase (Decrease) in Accumulated Other Comprehensive Loss [Roll Forward]	'		'		'		'
Beginning balance	0	[2]	1,796	[2]	0	[2]	3,252	[2]
Other comprehensive income (loss) before reclassifications	0	[2]	-887	[2]	0	[2]	-2,022	[2]
Amounts reclassified out of accumulated other comprehensive income (loss)	0	[1],[2]	-279	[1],[2]	0	[1],[2]	-600	[1],[2]
Ending balance	$0	[2]	$630	[2]	$0	[2]	$630	[2]
[1]	Amounts reclassified out of accumulated other comprehensive income (loss) consist of the following:
[2]	Amounts in this table are net of tax

Shareholders_Equity_Reclassifi

Shareholders' Equity - Reclassification of Amounts Out of Accumulated Other Comprehensive Income (Loss) (Details) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income On Derivatives [Line Items]	'	'	'	'
Tax expense (benefit)	$143,643	$104,129	$191,684	$256,927
Reclassification out of Accumulated Other Comprehensive Income | Unrealized Gains (Losses) on Cash Flow Hedges	'	'	'	'
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income On Derivatives [Line Items]	'	'	'	'
Tax expense (benefit)	-716	-1,640	-1,704	-3,482
Net of tax	1,215	2,804	2,891	5,957
Reclassification out of Accumulated Other Comprehensive Income | Unrealized Gains (Losses) on Cash Flow Hedges | Interest Expense	'	'	'	'
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income On Derivatives [Line Items]	'	'	'	'
Settlements of derivatives	1,931	4,444	4,595	9,439
Reclassification out of Accumulated Other Comprehensive Income | Unrealized Gains (Losses) on Investments Available for Sale	'	'	'	'
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income On Derivatives [Line Items]	'	'	'	'
Discount accretion	0	'	0	'
Tax expense (benefit)	0	164	0	351
Net of tax	0	-279	0	-600
Reclassification out of Accumulated Other Comprehensive Income | Unrealized Gains (Losses) on Investments Available for Sale | Interest Expense	'	'	'	'
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income On Derivatives [Line Items]	'	'	'	'
Discount accretion	'	($443)	'	($951)