Santander Consumer USA (SC) 10-Q 31 Jul 18 2018 Q2 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2018	Jul. 27, 2018
Document And Entity Information [Abstract]
Entity Registrant Name	Santander Consumer USA Holdings Inc.
Entity Central Index Key	1,580,608
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	Jun. 30, 2018
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	Q2
Amendment Flag	false
Entity Common Stock, Shares Outstanding		361,571,576

CONDENSED CONSOLIDATED BALANCE

CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Assets
Cash and cash equivalents - $10,255 and $106,295 held at affiliates, respectively	$ 319,688	$ 527,805
Finance receivables held for sale, net	1,246,732	2,210,421
Finance receivables held for investment, net	24,096,770	22,427,769
Restricted cash - $1,786 and $2,529 held at affiliates, respectively	2,125,410	2,553,902
Accrued interest receivable	286,164	326,640
Leased vehicles, net	11,729,482	10,160,327
Furniture and equipment, net of accumulated depreciation of $63,155 and $55,525, respectively	64,599	69,609
Federal, state and other income taxes receivable	100,517	95,060
Related party taxes receivable	467	467
Goodwill	74,056	74,056
Intangible assets, net of amortization of $47,558 and $36,616, respectively	31,613	29,734
Due from affiliates	35,398	33,270
Other assets	1,062,240	913,244
Total assets	41,173,136	39,422,304
Liabilities:
Notes payable — credit facilities	4,502,823	4,848,316
Notes payable — secured structured financings	24,300,820	22,557,895
Notes payable — related party	3,125,963	3,754,223
Accrued interest payable	43,882	38,529
Accounts payable and accrued expenses	470,439	429,531
Deferred tax liabilities, net	1,079,557	897,121
Due to affiliates	154,192	82,382
Other liabilities	449,726	333,806
Total liabilities	34,127,402	32,941,803
Commitments and contingencies (Notes 5 and 10)
Equity:
Common stock, $0.01 par value - 1,100,000,000 shares authorized; 361,260,828 and 360,779,465 shares issued and 361,008,826 and 360,527,463 shares outstanding, respectively	3,614	3,605
Additional paid-in capital	1,693,896	1,681,558
Accumulated other comprehensive income, net	62,449	44,262
Retained earnings	5,285,775	4,751,076
Total stockholders’ equity	7,045,734	6,480,501
Total liabilities and equity	41,173,136	39,422,304
Assets
Restricted cash	1,657,399	1,995,557
Finance receivables held for sale, net	63,941	1,106,393
Finance receivables held for investment, net	23,109,528	21,715,365
Leased vehicles, net	11,729,482	10,160,327
Various other assets	701,267	733,123
Total assets	37,261,617	35,710,765
Liabilities
Notes payable	29,514,923	28,467,942
Various other liabilities	221,065	197,969
Total liabilities	$ 29,735,988	$ 28,665,911

CONDENSED CONSOLIDATED BALANCE3

CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Statement of Financial Position [Abstract]
Cash and cash equivalents held for affiliates	$ 10,255	$ 106,295
Restricted cash held for affiliates	1,786	2,529
Accumulated depreciation	63,155	55,525
Accumulated amortization	$ 47,558	$ 36,616
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	361,660,985	360,779,465
Common stock, shares outstanding	361,408,983	360,527,463

CONDENSED CONSOLIDATED STATEMEN

CONDENSED CONSOLIDATED STATEMENTS OF INCOME AND COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Income Statement [Abstract]
Interest on finance receivables and loans	$ 1,156,536	$ 1,232,252	$ 2,270,673	$ 2,441,438
Leased vehicle income	537,897	429,264	1,042,175	847,497
Other finance and interest income	8,494	5,205	15,631	9,030
Total finance and other interest income	1,702,927	1,666,721	3,328,479	3,297,965
Interest expense — Including $43,640, $36,791, $85,673 and $74,515 to affiliates, respectively	273,953	233,371	514,981	460,460
Leased vehicle expense	360,335	298,224	719,018	588,395
Net finance and other interest income	1,068,639	1,135,126	2,094,480	2,249,110
Provision for credit losses	352,575	520,555	811,570	1,155,568
Net finance and other interest income after provision for credit losses	716,064	614,571	1,282,910	1,093,542
Profit sharing	12,853	8,443	17,230	16,388
Net finance and other interest income after provision for credit losses and profit sharing	703,211	606,128	1,265,680	1,077,154
Investment losses, net — Including $3,177, $3,461, $20,080 and $6,180 from affiliates, respectively	(82,634)	(99,522)	(169,154)	(175,921)
Servicing fee income — Including $11,375, $2,625, $21,447 and $5,888 from affiliates, respectively	27,538	31,953	53,720	63,637
Fees, commissions, and other — Including $398, $380 and $769 and $605 from affiliates, respectively	77,480	91,964	162,871	192,159
Total other income	22,384	24,395	47,437	79,875
Compensation expense	118,598	127,894	240,603	264,156
Repossession expense	63,660	67,269	135,741	138,568
Other operating costs — Including $3,111, $22,721, $4,273 and $44,365 to affiliates, respectively	94,692	87,252	188,518	184,769
Total operating expenses	276,950	282,415	564,862	587,493
Income before income taxes	448,645	348,108	748,255	569,536
Income tax expense	114,004	83,433	171,315	161,434
Net income	334,641	264,675	576,940	408,102
Other comprehensive income (loss):
Change in unrealized gains (losses) on cash flow hedges, net of tax of $79, $(4,231), $2,981 and $96, respectively	(762)	(7,644)	12,038	(399)
Comprehensive income	$ 333,879	$ 257,031	$ 588,978	$ 407,703
Net income per common share (basic) (in usd per share)	$ 0.93	$ 0.74	$ 1.60	$ 1.14
Net income per common share (diluted) (in usd per share)	0.92	0.74	1.59	1.13
Dividend declared per common share (in usd per share)	$ 0.05	$ 0	$ 0.10	$ 0
Weighted average common shares (basic) (in shares)	361,268,112	359,461,407	360,987,233	359,284,213
Weighted average common shares (diluted) (in shares)	362,057,614	359,828,690	361,829,283	359,928,003

CONDENSED CONSOLIDATED STATEME5

CONDENSED CONSOLIDATED STATEMENTS OF INCOME AND COMPREHENSIVE INCOME (Unaudited) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Income Statement [Abstract]
Interest expense to affiliates	$ 43,640	$ 36,791	$ 85,673	$ 74,515
Investment losses, net from affiliates	3,177	3,461	20,080	6,180
Servicing fee income from affiliates	11,375	2,625	21,447	5,888
Fees, commissions and other from affiliates	398	380	769	605
Other operating costs to affiliates	3,111	22,721	4,273	44,365
Change in unrealized gains (losses) on cash flow hedges, tax	$ 79	$ (4,231)	$ 2,981	$ 96

CONDENSED CONSOLIDATED STATEME6

CONDENSED CONSOLIDATED STATEMENTS OF EQUITY (Unaudited) - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Accumulated Other Comprehensive Income (Loss)	Retained Earnings
Beginning balance (in shares) at Dec. 31, 2016		358,908,000
Beginning balance at Dec. 31, 2016	$ 5,238,619	$ 3,589	$ 1,657,611	$ 28,259	$ 3,549,160
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative-effect adjustment upon adoption of ASU	26,552		1,439		25,113
Stock issued in connection with employee incentive compensation plans (in shares)		631,000
Stock issued in connection with employee incentive compensation plans	1,777	$ 6	1,771
Stock-based compensation expense	4,084		4,084
Tax sharing with affiliate	(2)		(2)
Net income	408,102				408,102
Other comprehensive income (loss), net of taxes	(399)			(399)
Ending balance (in shares) at Jun. 30, 2017		359,539,000
Ending balance at Jun. 30, 2017	5,678,733	$ 3,595	1,664,903	27,860	3,982,375
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	264,675
Ending balance (in shares) at Jun. 30, 2017		359,539,000
Ending balance at Jun. 30, 2017	$ 5,678,733	$ 3,595	1,664,903	27,860	3,982,375
Beginning balance (in shares) at Dec. 31, 2017	360,527,463	360,527,000
Beginning balance at Dec. 31, 2017	$ 6,480,501	$ 3,605	1,681,558	44,262	4,751,076
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative-effect adjustment upon adoption of ASU	0			6,149	(6,149)
Stock issued in connection with employee incentive compensation plans (in shares)		882,000
Stock issued in connection with employee incentive compensation plans	2,822	$ 9	2,813
Stock-based compensation expense	5,794		5,794
Dividends	(36,092)				(36,092)
Tax sharing with affiliate	3,731		3,731
Net income	576,940				576,940
Other comprehensive income (loss), net of taxes	$ 12,038			12,038
Ending balance (in shares) at Jun. 30, 2018	361,408,983	361,409,000
Ending balance at Jun. 30, 2018	$ 7,045,734	$ 3,614	1,693,896	62,449	5,285,775
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 334,641
Ending balance (in shares) at Jun. 30, 2018	361,408,983	361,409,000
Ending balance at Jun. 30, 2018	$ 7,045,734	$ 3,614	$ 1,693,896	$ 62,449	$ 5,285,775

CONDENSED CONSOLIDATED STATEME7

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Cash flows from operating activities:
Net income	$ 576,940	$ 408,102
Adjustments to reconcile net income to net cash provided by operating activities
Derivative mark to market	(10,199)	(615)
Provision for credit losses	811,570	1,155,568
Depreciation and amortization	775,849	643,365
Accretion of discount	(91,856)	(134,103)
Originations and purchases of receivables held for sale	(1,837,463)	(1,709,053)
Proceeds from sales of and collections on receivables held for sale	2,766,700	1,624,515
Change in revolving personal loans, net	(72,922)	(78,697)
Investment losses, net	169,154	175,921
Stock-based compensation	5,794	4,084
Deferred tax expense	177,046	168,407
Changes in assets and liabilities:
Accrued interest receivable	16,231	23,723
Accounts receivable	12,100	(8,904)
Federal income tax and other taxes	(5,465)	(9,312)
Other assets	(69,117)	(15,809)
Accrued interest payable	7,477	(2,954)
Other liabilities	115,943	(48,221)
Due to/from affiliates	65,265	19,787
Net cash provided by operating activities	3,413,047	2,215,804
Cash flows from investing activities:
Originations of and disbursements on finance receivables held for investment	(7,783,649)	(6,189,385)
Purchases of portfolios of finance receivables held for investment	(116,458)	(152,208)
Collections on finance receivables held for investment	5,437,414	5,167,574
Proceeds from sale of loans held for investment	0	412
Leased vehicles purchased	(4,764,841)	(3,042,480)
Manufacturer incentives received	445,266	556,860
Proceeds from sale of leased vehicles	1,959,866	1,282,533
Change in revolving personal loans, net	59,350	39,322
Purchases of furniture and equipment	(4,220)	(11,623)
Sales of furniture and equipment	74	230
Other investing activities	(6,578)	(4,160)
Net cash used in investing activities	(4,773,776)	(2,352,925)
Cash flows from financing activities:
Proceeds from notes payable related to secured structured financings — net of debt issuance costs	8,651,828	9,335,625
Payments on notes payable related to secured structured financings	(6,924,281)	(7,206,766)
Proceeds from unsecured notes payable	0	5,515,000
Payments on unsecured notes payable	0	(4,885,577)
Proceeds from notes payable	14,060,698	11,380,056
Payments on notes payable	(15,033,991)	(13,824,855)
Proceeds from stock option exercises, gross	5,958	4,450
Dividends paid		0
Net cash provided by financing activities	724,120	317,933
Net increase (decrease) in cash and cash equivalents and restricted cash	(636,609)	180,812
Cash and cash equivalent and restricted cash — Beginning of period	3,081,707	2,917,479
Cash and cash equivalents and restricted cash — End of period	2,445,098	3,098,291
Noncash investing and financing transactions:
Transfer of notes payable between secured and unsecured notes payable	$ 300,000	$ 495,991

CONDENSED CONSOLIDATED STATEME8

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017	Jun. 30, 2017	Dec. 31, 2016
Supplemental cash flow information:
Cash and cash equivalents	$ 319,688	$ 527,805	$ 341,412
Restricted cash	2,125,410	2,553,902	2,756,879
Total cash and cash equivalents and restricted cash	$ 2,445,098	$ 3,081,707	$ 3,098,291	$ 2,917,479

Description of Business, Basis

Description of Business, Basis of Presentation, and Significant Accounting Policies and Practices	6 Months Ended
	Jun. 30, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Description of Business, Basis of Presentation, and Significant Accounting Policies and Practices	Description of Business, Basis of Presentation, and Significant Accounting Policies and Practices Santander Consumer USA Holdings Inc., a Delaware corporation (together with its subsidiaries, SC or the Company), is the holding company for Santander Consumer USA Inc., an Illinois corporation (SC Illinois), and its subsidiaries, a specialized consumer finance company focused on vehicle finance and third-party servicing. The Company’s primary business is the indirect origination and securitization of retail installment contracts principally through manufacturer-franchised dealers in connection with their sale of new and used vehicles to retail consumers. Since May 1, 2013, under the terms of a ten -year private label financing agreement (the Chrysler Agreement) with FCA, the Company has been FCA's preferred provider for consumer loans and leases and Dealer Loans. Under the Chrysler Agreement, the Company offers a full spectrum of auto financing products and services to FCA 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. Retail installment contracts and vehicle leases entered into with FCA customers, as part of the Chrysler Agreement, represent a significant concentration of those portfolios and there is a risk that the Chrysler Agreement could be terminated prior to its expiration date. Termination of the Chrysler Agreement could result in a decrease in the amount of new retail installment contracts and vehicle leases entered into with FCA customers as well as Dealer Loans. On June 1, 2018, the Company announced that is in exploratory discussions with FCA regarding the future of FCA’s U.S. finance operations. FCA has announced its intention to establish a captive U.S. auto finance unit and indicated that acquiring Chrysler Capital is one option it will consider. Under the Chrysler Agreement, FCA has the option to acquire, for fair market value, an equity participation in the business offering and providing the financial services contemplated by the Chrysler Agreement. The likelihood, timing and structure of any such transaction, and the likelihood that the Chrysler Agreement will terminate, cannot be reasonably determined. On July 11, 2018, in order to facilitate discussions regarding the Chrysler Agreement, FCA and the Company entered into a tolling agreement pursuant to which the parties agreed to preserve their respective rights, claims and defenses under the Chrysler Agreement as they existed on April 30, 2018. 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 other relationships through which it provides personal loans, private-label revolving lines of credit and other consumer finance products. As of June 30, 2018 , the Company was owned approximately 68.0% by Santander Holdings USA, Inc. (SHUSA), a subsidiary of Banco Santander, S.A. (Santander), and approximately 32.0% by other shareholders. Basis of Presentation The accompanying condensed consolidated financial statements include the accounts of the Company and its subsidiaries, including certain Trusts, which are considered VIEs. The Company also consolidates other VIEs for which it was deemed to be the primary beneficiary. All intercompany balances and transactions have been eliminated in consolidation. The accompanying condensed consolidated financial statements as of June 30, 2018 and December 31, 2017 , and for the three and six months ended June 30, 2018 and 2017 , have been prepared in accordance with 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 U.S. GAAP for complete financial statements. In the opinion of management, these financial statements contain all adjustments, consisting of normal recurring adjustments, necessary for the fair statement of 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 2017 Annual Report on Form 10-K. The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that 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 credit loss allowance, discount accretion, impairment, fair value, 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 recreational vehicles, and marine vehicles. It also includes the Company’s personal loan and point-of-sale financing operations. Accounting Policies There have been no material changes in the Company's accounting policies from those disclosed in Part II, Item 8 - Financial Statements and Supplementary Data in the 2017 Annual Report on Form 10-K. Recently Adopted Accounting Standards Since January 1, 2018, the Company adopted the following Financial Accounting Standards Board (FASB) Accounting Standards Updates (ASUs): • ASU 2014-09, Revenue from Contracts with Customers (Topic 606) as amended . This ASU, requires an entity to recognize revenue for the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. It includes a five-step process to assist an entity in achieving the main principles of revenue recognition under ASC 606. Because the ASU does not apply to revenue associated with leases and financial instruments (including loans, securities, and derivatives), it did not have a material impact on the elements of the Company's Consolidated Statements of Operations most closely associated with leases and financial instruments (such as interest income, interest expense and investment gains and losses). All other revenue streams in the scope of the new standard were not material. The Company adopted this standard as of January 1, 2018 using a modified retrospective approach. The adoption of this standard did not require any adjustments to the opening balance of retained earnings as of January 1, 2018. • ASU 2016-18, Statement of Cash Flows (Topic 230) . Restricted Cash (A consensus of the FASB Emerging Issues Task Force) , which requires that the statement of cash flows include restricted cash in the beginning and end-of-period total amounts shown on the statement of cash flows and that the statement of cash flows explain changes in restricted cash during the period. The Company adopted this standard as of January 1, 2018 using retrospective approach. The impact of this adoption was disclosure only for periods presented on the Company's Statements of Cash Flows. • ASU 2017-12, Derivatives and Hedging: Targeted Improvements to Accounting for Hedging Activities . The new guidance amends the hedge accounting model to enable entities to more accurately reflect their risk management activities in the financial statements. The amendments expand an entity’s ability to hedge nonfinancial and financial risk components and reduce complexity in hedges of interest rate risk. The guidance eliminates the requirement to separately measure and report hedge ineffectiveness and generally requires the entire change in the fair value of a hedging instrument to be presented in the same income statement line in which the earnings effect of the hedged item is reported. The new guidance is effective for public business entities for fiscal years beginning after December 15, 2018, with early adoption, including adoption in an interim period, permitted. The Company elected to early adopt this standard as of January 1, 2018 using modified retrospective approach. The adoption of this standard did not require any adjustments to the opening balance of retained earnings for cumulative-effect adjustment related to eliminating the separate measurement of ineffectiveness. • ASU 2018-02, Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income. The amendments in this ASU allow a reclassification from accumulated other comprehensive income to retained earnings for stranded tax effects resulting from the Tax Cuts and Jobs Act. The new guidance is effective for public business entities for fiscal years beginning after December 15, 2018, with early adoption, including adoption in an interim period, permitted. The Company elected to early adopt this standard as of January 1, 2018 and reclassified $6,149 stranded income tax effects from accumulated other comprehensive income to retained earnings. The adoption of the following ASUs did not have an impact on the Company's business, financial position or results of operations. • ASU 2016-01, Financial Instruments - Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities, as amended • ASU 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments • ASU 2016-16, Income Taxes (Topic 740): Intra-Entity Transfers of Assets Other Than Inventory • ASU 2017-01, Business Combinations (Topic 805): Clarifying the Definition of a Business • ASU 2017-05, Other Income - Gains and Losses from the Derecognition of Nonfinancial Assets (Subtopic 610-20): Clarifying the Scope of Asset Derecognition Guidance and Accounting for Partial Sales of Nonfinancial Assets • ASU 2017-07, Compensation - Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost • ASU 2017-09 , Compensation-Stock Compensation (Topic 718): Scope of Modification Accounting • ASU 2018-05, Income Taxes (Topic 740): Amendments to SEC Paragraphs Pursuant to SEC Staff Accounting Bulletin No. 118 • ASU 2018-06 , Codification Improvements to Topic 942, Financial Services—Depository and Lending Recently Issued Accounting Pronouncements In February 2016, the FASB issued ASU 2016-02, Leases , which will, among other impacts, change the criteria under which leases are identified and accounted for as on- or off-balance sheet. The guidance will be effective for the fiscal year beginning after December 15, 2018, including interim periods within that year. Once effective, the new guidance must be applied for all periods presented. The Company is in the process of reviewing its existing property and equipment lease contracts as well as service contracts that may include embedded leases. Upon adoption, the Company will gross up its balance sheet by the present value of future minimum lease payments for these operating leases. The Company does not intend to early adopt this ASU. In June 2016, the FASB issued ASU 2016-13, Financial Instruments-Credit Losses , which changes the criteria under which credit losses are measured. The amendment introduces a new credit reserving model known as the Current Expected Credit Loss (CECL) model, which replaces the incurred loss impairment methodology in current U.S. GAAP with a methodology that reflects expected credit losses and requires consideration of a broader range of reasonable and supportable information to establish credit loss estimates. The guidance will be effective for the fiscal year beginning after December 15, 2019, including interim periods within that year. The Company does not intend to adopt the new standard early and is currently evaluating the impact the new guidance will have on its financial position, results of operations and cash flows; however, it is expected that the new CECL model will alter the assumptions used in calculating the Company's credit losses, given the change to estimated losses for the estimated life of the financial asset, and will likely result in material changes to the Company’s credit and capital reserves. In addition to those described in detail above, the Company is also in the process of evaluating the following ASUs and does not expect them to have a material impact on the Company's business, financial position, results of operations or disclosures: • ASU 2017-06, Plan Accounting: Defined Benefit Pension Plans (Topic 960), Defined Contribution Pension Plans (Topic 962), Health and Welfare Benefit Plans (Topic 965): Employee Benefit Plan Master Trust Reporting (a consensus of the Emerging Issues Task Force) • ASU 2017-08, Receivables - Nonrefundable Fees and Other Costs (Subtopic 310-20): Premium Amortization on Purchased Callable Debt Securities • ASU 2017-11, Earnings Per Share (Topic 260); Distinguishing Liabilities from Equity (Topic 480); Derivatives and Hedging (Topic 815): (Part I) Accounting for Certain Financial Instruments with Down Round Features, (Part II) Replacement of the Indefinite Deferral for Mandatorily Redeemable Financial Instruments of Certain Nonpublic Entities and Certain Mandatorily Redeemable Noncontrolling Interests with a Scope Exception • ASU 2018-07, Compensation - Stock Compensation (Topic 718): Improvements to Nonemployee Share-Based Payment Accounting

Finance Receivables

Finance Receivables	6 Months Ended
	Jun. 30, 2018
Receivables [Abstract]
Finance Receivables	Finance Receivables Held For Investment Finance receivables held for investment, net is comprised of the following at June 30, 2018 and December 31, 2017 : June 30, December 31, 2017 Retail installment contracts acquired individually (a) $ 24,039,237 $ 22,362,509 Purchased receivables 22,678 27,839 Receivables from dealers 15,042 15,623 Personal loans 3,038 4,459 Capital lease receivables (Note 3) 16,775 17,339 Finance receivables held for investment, net $ 24,096,770 $ 22,427,769 (a) The Company has elected the fair value option for certain retail installment contracts reported in finance receivables held for investment, net. As at June 30, 2018 and December 31, 2017 , $17,182 and $22,124 of loans were recorded at fair value (Note 13). The Company's held for investment portfolio of retail installment contracts acquired individually, receivables from dealers, and personal loans is comprised of the following at June 30, 2018 and December 31, 2017 : June 30, 2018 Retail Installment Contracts Receivables from Personal Loans Non-TDR TDR Unpaid principal balance $ 21,414,617 $ 5,958,564 $ 15,200 $ 4,016 Credit loss allowance - specific — (1,496,580 ) — — Credit loss allowance - collective (1,641,214 ) — (158 ) (1,116 ) Discount (212,484 ) (58,265 ) — — Capitalized origination costs and fees 69,151 5,448 — 138 Net carrying balance $ 19,630,070 $ 4,409,167 $ 15,042 $ 3,038 December 31, 2017 Retail Installment Contracts Receivables from Personal Loans Non-TDR TDR Unpaid principal balance $ 19,681,394 $ 6,261,894 $ 15,787 $ 6,887 Credit loss allowance - specific — (1,731,320 ) — — Credit loss allowance - collective (1,529,815 ) — (164 ) (2,565 ) Discount (309,191 ) (74,832 ) — (1 ) Capitalized origination costs and fees 58,638 5,741 — 138 Net carrying balance $ 17,901,026 $ 4,461,483 $ 15,623 $ 4,459 Retail installment contracts 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 lines or securitization bonds (Note 5). Most of the borrowers on the Company’s retail installment contracts held for investment are retail consumers; however, $527,763 and $641,003 of the unpaid principal balance represented fleet contracts with commercial borrowers as of June 30, 2018 and December 31, 2017 , respectively. During the six months ended June 30, 2018 and 2017 , the Company originated $4,689,784 and $3,389,700 , respectively, in Chrysler Capital loans which represented 49% and 43% , respectively, of the total retail installment contract originations (unpaid principal balance). As of June 30, 2018 and December 31, 2017 , the Company's carrying value of auto retail installment contract portfolio consisted of $7,987,546 and $8,234,653 , respectively, of Chrysler Capital loans which represents 33% and 37% , respectively, of the Company's carrying value of auto retail installment contract portfolio. As of June 30, 2018 , borrowers on the Company’s retail installment contracts held for investment are located in Texas ( 16% ), Florida ( 12% ), California ( 9% ), Georgia ( 6% ) and other states each individually representing less than 5% of the Company’s total portfolio. Purchased receivables Purchased receivables portfolios, which were acquired with deteriorated credit quality, is comprised of the following at June 30, 2018 and December 31, 2017 : June 30, December 31, 2017 Outstanding balance $ 35,750 $ 43,474 Outstanding recorded investment, net of impairment 22,845 28,069 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 2018 2017 2018 2017 Balance — beginning of period $ 18,446 $ 97,946 $ 19,464 $ 107,041 Accretion of accretable yield (2,245 ) (10,303 ) (5,085 ) (21,447 ) Reclassifications from (to) nonaccretable difference (a) 2,167 351 3,989 2,400 Balance — end of period $ 18,368 $ 87,994 $ 18,368 $ 87,994 (a) Reclassifications from (to) nonaccretable difference represents the increases (decreases) in accretable yield resulting from higher (lower) estimated undiscounted cash flows. During the three and six months ended June 30, 2018 and 2017 , 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. However, during the three months ended June 30, 2018 and 2017 , the Company recognized certain retail installment contracts with an unpaid principal balance of $72,963 and $74,405 , respectively, and for the six months ended June 30, 2018 and 2017 , the Company recognized certain retail installment contracts with an unpaid principal balance of $115,959 and $226,613 , respectively, held by non-consolidated securitization Trusts, under optional clean-up calls (Note 6). Following the initial recognition of these loans at fair value, the performing loans in the portfolio are carried at amortized cost, net of allowance for credit losses. The Company elected the fair value option for all non-performing loans acquired (more than 60 days delinquent as of re-recognition date), for which it was probable that not all contractually required payments would be collected (Note 13). Receivable from Dealers The receivables from dealers held for investment are all Chrysler Agreement-related. As of June 30, 2018 , borrowers on these dealer receivables are located in Virginia ( 63% ), New York ( 27% ) and Missouri ( 10% ). Held For Sale The carrying value of the Company's finance receivables held for sale, net is comprised of the following at June 30, 2018 and December 31, 2017 : June 30, December 31, 2017 Retail installment contracts acquired individually $ 290,277 $ 1,148,332 Personal loans 956,455 1,062,089 Finance receivables held for sale, net $ 1,246,732 $ 2,210,421 Sales of retail installment contracts and proceeds from sales of charged-off assets for the three and six months ended June 30, 2018 and 2017 were as follows: For the Three Months Ended For the Six Months Ended 2018 2017 2018 2017 Sales of retail installment contracts to third parties $ — $ 30,000 $ — $ 260,568 Sale of retail installment contracts to affiliates 1,156,060 536,309 2,631,313 1,236,331 Proceeds from sales of charged-off assets to third parties 16,638 27,449 34,875 48,792 The Company retains servicing of retail installment contracts and leases sold to third parties. Total contracts sold to unrelated third parties and/or serviced as of June 30, 2018 and December 31, 2017 were as follows: June 30, December 31, 2017 Serviced balance of retail installment contracts and leases $ 5,089,007 $ 5,771,085

Leases

Leases	6 Months Ended
	Jun. 30, 2018
Leases [Abstract]
Leases	Leases The Company originates operating and capital leases, which are separately accounted for and recorded on the Company's condensed consolidated balance sheets. Operating leases are reported as leased vehicles, net, while capital leases are included in finance receivables held for investment, net. Operating Leases Leased vehicles, net, which is comprised of leases originated under the Chrysler Agreement, consisted of the following as of June 30, 2018 and December 31, 2017 : June 30, December 31, Leased vehicles $ 15,874,839 $ 14,285,769 Less: accumulated depreciation (3,039,121 ) (3,110,167 ) Depreciated net capitalized cost 12,835,718 11,175,602 Manufacturer subvention payments, net of accretion (1,152,082 ) (1,042,477 ) Origination fees and other costs 45,846 27,202 Net book value $ 11,729,482 $ 10,160,327 The following summarizes the future minimum rental payments due to the Company as lessor under operating leases as of June 30, 2018 : Remainder of 2018 $ 1,054,424 2019 1,658,331 2020 978,411 2021 164,984 2022 3,664 Thereafter — Total $ 3,859,814 Capital Leases Certain leases originated by the Company are accounted for as capital leases, as the contractual residual values are nominal amounts. Capital lease receivables, net consisted of the following as of June 30, 2018 and December 31, 2017 : June 30, December 31, Gross investment in capital leases $ 24,273 $ 27,234 Origination fees and other 157 124 Less: unearned income (4,073 ) (4,377 ) Net investment in capital leases before allowance 20,357 22,981 Less: allowance for lease losses (3,582 ) (5,642 ) Net investment in capital leases $ 16,775 $ 17,339 The following summarizes the future minimum lease payments due to the Company as lessor under capital leases as of June 30, 2018 : Remainder of 2018 $ 4,705 2019 6,975 2020 5,392 2021 3,773 2022 2,941 Thereafter 487 Total $ 24,273

Credit Loss Allowance and Credi

Credit Loss Allowance and Credit Quality	6 Months Ended
	Jun. 30, 2018
Loans and Leases Receivable Disclosure [Abstract]
Credit Loss Allowance and Credit Quality	640 15.4% 15.1% (a) No FICO score is obtained on loans to commercial borrowers. (b) Percentages are based on unpaid principal balance. Commercial Lending — The Company's risk department performs a credit analysis and classifies certain loans over an internal threshold based on the commercial lending classifications described in Note 4 of the 2017 Annual Report on Form 10-K. Fleet loan credit quality indicators for retail installment contracts held for investment with commercial borrowers as of June 30, 2018 and December 31, 2017 were as follows: June 30, December 31, Pass $ 9,974 $ 12,276 Special Mention 4,265 5,324 Substandard 434 715 Doubtful — — Loss — — Total (Unpaid principal balance) $ 14,673 $ 18,315 Commercial loan credit quality indicators for receivables from dealers held for investment as of June 30, 2018 and December 31, 2017 were as follows: June 30, December 31, Pass $ 15,167 $ 14,130 Special Mention 33 1,657 Substandard — — Doubtful — — Loss — — Total (Unpaid principal balance) $ 15,200 $ 15,787 Troubled Debt Restructurings In certain circumstances, the Company modifies the terms of its finance receivables to troubled borrowers. Modifications may include a temporary reduction in monthly payment, reduction in interest rate, an extension of the maturity date, rescheduling of future cash flows, or a combination thereof. A modification of finance receivable terms is considered a TDR if the Company grants a concession to a borrower for economic or legal reasons related to the debtor’s financial difficulties that 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. Additionally, restructurings through bankruptcy proceedings are deemed to be TDRs. The purchased receivables portfolio, operating and capital leases, and loans held for sale, including personal loans, are excluded from the scope of the applicable guidance. The Company's TDR balance as of June 30, 2018 and December 31, 2017 primarily consisted of loans that had been deferred or modified to receive a temporary reduction in monthly payment. As of June 30, 2018 and December 31, 2017 , there were no receivables from dealers classified as a TDR. For loans not classified as TDRs, the Company generally estimates an appropriate allowance for credit losses 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, it is generally assessed for impairment based on the present value of expected future cash flows discounted at the loan's original effective interest rate considering all available evidence. For loans that are considered collateral-dependent, such as certain bankruptcy modifications, impairment is measured based on the fair value of the collateral, less its estimated cost to sell. The table below presents the Company’s TDRs as of June 30, 2018 and December 31, 2017 : June 30, December 31, 2017 Retail Installment Contracts Outstanding recorded investment (a) $ 5,932,209 $ 6,261,432 Impairment (1,496,580 ) (1,731,320 ) Outstanding recorded investment, net of impairment $ 4,435,629 $ 4,530,112 (a) As of June 30, 2018 , the outstanding recorded investment excludes $78.3 million of collateral-dependent bankruptcy TDRs that has been written down by $33.2 million to fair value less cost to sell. As of December 31, 2017 , the outstanding recorded investment excludes $64.7 million of collateral-dependent bankruptcy TDRs that has been written down by $29.2 million to fair value less cost to sell. A summary of the Company’s delinquent TDRs at June 30, 2018 and December 31, 2017 , is as follows: June 30, December 31, 2017 Retail Installment Contracts (a) Principal, 30-59 days past due $ 1,202,120 $ 1,332,239 Delinquent principal over 59 days 599,760 818,938 Total delinquent TDR principal $ 1,801,880 $ 2,151,177 (a) The balances in the above table reflects total unpaid principal balance rather than net recorded investment before allowance. A summary of the Company’s TDRs that were placed on nonaccrual status at June 30, 2018 and December 31, 2017 , is as follows: June 30, December 31, 2017 Retail Installment Contracts (a) TDRs on cost recovery method (b) $ 1,161,487 $ 790,461 TDRs on cash basis accounting 393,373 599,912 Total nonaccrual TDR principal $ 1,554,860 $ 1,390,373 (a) The balances in the above table reflects total unpaid principal balance rather than net recorded investment before allowance. (b) Out of the total TDRs on cost recovery method, $1,022,007 and $652,679 of TDRs were less than 60 days past due as of June 30, 2018 and December 31, 2017 , respectively. The Company applied $142,523 and $56,740 of interest received, on these loans, towards recorded investment (as compared to interest income), in accordance with cost recovery method as of June 30, 2018 and December 31, 2017 , respectively. Average recorded investment and income recognized on TDR loans are as follows: Three Months Ended June 30, 2018 June 30, 2017 Retail Installment Contracts Average outstanding recorded investment in TDRs $ 5,978,346 $ 5,860,748 Interest income recognized $ 202,788 $ 224,810 Six Months Ended June 30, 2018 June 30, 2017 Retail Installment Contracts Average outstanding recorded investment in TDRs $ 6,084,560 $ 5,786,429 Interest income recognized $ 443,999 $ 485,162 The following table summarizes the financial effects, excluding impacts related to credit loss allowance and impairment, of TDRs (including collateral-dependent bankruptcy TDRs) that occurred for the three and six months ended June 30, 2018 and 2017 : Three Months Ended June 30, 2018 June 30, 2017 Retail Installment Contracts Outstanding recorded investment before TDR $ 723,925 $ 773,629 Outstanding recorded investment after TDR $ 725,438 $ 787,278 Number of contracts (not in thousands) 43,265 44,598 Six Months Ended June 30, 2018 June 30, 2017 Retail Installment Contracts Outstanding recorded investment before TDR $ 1,308,373 $ 1,655,328 Outstanding recorded investment after TDR $ 1,308,102 $ 1,653,556 Number of contracts (not in thousands) 77,639 94,097 Loan restructurings accounted for as TDRs within the previous twelve months that subsequently defaulted during the three and six months ended June 30, 2018 and 2017 are summarized in the following table: Three Months Ended June 30, 2018 June 30, 2017 Retail Installment Contracts Recorded investment in TDRs that subsequently defaulted (a) $ 144,561 $ 190,467 Number of contracts (not in thousands) 8,707 10,622 Six Months Ended June 30, 2018 June 30, 2017 Retail Installment Contracts Recorded investment in TDRs that subsequently defaulted (a) $ 339,826 $ 402,164 Number of contracts (not in thousands) 20,247 22,516 (a) For TDR modifications and TDR modifications that subsequently defaults, the allowance methodology remains unchanged; however, the transition rates of the TDR loans are adjusted to reflect the respective risks." id="sjs-B4">Credit Loss Allowance and Credit Quality Credit Loss Allowance The Company estimates the allowance for credit losses on individually acquired retail installment contracts and personal loans held for investment not classified as TDRs based on delinquency status, historical loss experience, estimated values of underlying collateral, when applicable, and various economic factors. In developing the allowance, the Company utilizes a loss emergence period assumption, a loss given default assumption applied to recorded investment, and a probability of default assumption. The loss emergence period assumption represents the average length of time between when a loss event is first estimated to have occurred and when the account is charged-off. The recorded investment represents unpaid principal balance adjusted for unaccreted net discounts, subvention from manufacturers, and origination costs. Under this approach, the resulting allowance represents the expected net losses of recorded investment inherent in the portfolio. The Company uses a transition based Markov model for estimating the allowance for credit losses on individually acquired retail installment contracts. This model utilizes the recently observed loan transition rates from various loan statuses, including delinquency and accounting statuses from performing to charge off, to forecast future losses. For loans classified as TDRs, impairment is generally measured based on the present value of expected future cash flows discounted at the original effective interest rate. For loans that are considered collateral-dependent, such as certain bankruptcy modifications, impairment is measured based on the fair value of the collateral, less its estimated cost to sell. The amount of the allowance is equal to the difference between the loan’s impaired value and the recorded investment. The Company maintains a general credit loss allowance for receivables from dealers based on risk ratings and individually evaluates loans for specific impairment as necessary. As of June 30, 2018 and 2017 , the credit loss allowance for receivables from dealers is comprised entirely of general allowance as none of these receivables have been determined to be individually impaired. The activity in the credit loss allowance for individually acquired retail installment contracts and Dealer Loans for the three and six months ended June 30, 2018 and 2017 was as follows: Three Months Ended June 30, 2018 Three Months Ended June 30, 2017 Retail Installment Contracts Acquired Individually Receivables from Dealers Personal Loans Retail Installment Contracts Acquired Individually Receivables from Dealers Personal Loans Non-TDR TDR Non-TDR TDR Balance — beginning of period $ 1,586,557 $ 1,595,465 $ 161 $ 1,714 $ 1,836,730 $ 1,604,489 $ 734 $ 4,517 Provision for credit losses 242,286 112,144 (3 ) (83 ) 172,990 345,380 (21 ) 1,166 Charge-offs (a) (584,296 ) (427,079 ) — (695 ) (654,613 ) (457,102 ) — (1,586 ) Recoveries 396,667 216,050 — 180 405,702 193,392 — 265 Balance — end of period $ 1,641,214 $ 1,496,580 $ 158 $ 1,116 $ 1,760,809 $ 1,686,159 $ 713 $ 4,362 (a) For the three months ended June 30, 2018 and June 30, 2017 , charge-offs for retail installment contracts acquired individually includes approximately $7 million and $25 million , respectively, for the partial write-down of loans to the collateral value less estimated costs to sell, for which a bankruptcy notice was received. There is no additional credit loss allowance on these loans. Six Months Ended June 30, 2018 Six Months Ended June 30, 2017 Retail Installment Contracts Acquired Individually Receivables from Dealers Personal Loans Retail Installment Contracts Acquired Individually Receivables Personal Loans Non-TDR TDR Non-TDR TDR Balance — beginning of period $ 1,529,815 $ 1,731,320 $ 164 $ 2,565 $ 1,799,760 $ 1,611,295 $ 724 $ — Provision for credit losses 553,007 260,102 (6 ) (185 ) 515,082 632,385 (11 ) 9,141 Charge-offs (a) (1,263,735 ) (946,661 ) — (1,763 ) (1,388,767 ) (947,645 ) — (5,218 ) Recoveries 822,127 451,819 — 499 834,734 390,124 — 439 Balance — end of period $ 1,641,214 $ 1,496,580 $ 158 $ 1,116 $ 1,760,809 $ 1,686,159 $ 713 $ 4,362 (a) For the six months ended June 30, 2018 and June 30, 2017 , charge-offs for retail installment contracts acquired individually includes approximately $14 million and $48 million , respectively, for the partial write-down of loans to the collateral value less estimated costs to sell, for which a bankruptcy notice was received. There is no additional credit loss allowance on these loans. The Company estimates lease losses on the capital lease receivable portfolio based on delinquency status and loss experience to date, as well as various economic factors. The activity in the lease loss allowance for capital leases for the three and six months ended June 30, 2018 and 2017 was as follows: Three Months Ended Six Months Ended 2018 2017 2018 2017 Balance — beginning of period $ 5,757 $ 6,605 $ 5,642 $ 9,988 Provision for lease losses (1,769 ) 1,040 (1,348 ) (1,029 ) Charge-offs (1,760 ) (3,081 ) (3,141 ) (6,760 ) Recoveries 1,354 1,803 2,429 4,168 Balance — end of period $ 3,582 $ 6,367 $ 3,582 $ 6,367 There was no impairment activity noted for purchased receivable portfolio for the three and six months ended June 30, 2018 and June 30, 2017 . Delinquencies Retail installment contracts and personal amortizing term loans are classified as non-performing (or nonaccrual) when they are greater than 60 days past due as to contractual principal or interest payments. See discussion of TDR under the "Troubled Debt Restructurings" section below. Dealer receivables are classified as non-performing when they are greater than 90 days past due. At the time a loan is placed in non-performing (nonaccrual) status, previously accrued and uncollected interest is reversed against interest income. If an account is returned to a performing (accrual) status, the Company returns to accruing interest on the loan. The Company considers an account delinquent when an obligor fails to pay the required minimum portion of the scheduled payment by the due date. With respect to receivables originated by the Company through its “Chrysler Capital” channel, the required minimum payment is 90% of the scheduled payment. With respect to receivables originated by the Company or acquired by the Company from an unaffiliated third-party originator on or after January 1, 2017, the required minimum payment is 90% of the scheduled payment, whereas previous to January 1, 2017 the required minimum payment was 50% of the scheduled payment. In each case, the period of delinquency is based on the number of days payments are contractually past due. The accrual of interest on personal loans continues until the loan is charged off. The unpaid principal balance on personal loans (including revolving personal loans) 90 days or more past due and still accruing totaled $117,815 and $130,034 as of June 30, 2018 and December 31, 2017 , respectively. A summary of delinquencies as of June 30, 2018 and December 31, 2017 is as follows: June 30, 2018 Retail Installment Contracts Held for Investment Loans Acquired Individually Purchased Receivables Portfolios Total Principal, 30-59 days past due $ 2,532,058 $ 3,108 $ 2,535,166 Delinquent principal over 59 days (a) 1,149,429 1,981 1,151,410 Total delinquent principal $ 3,681,487 $ 5,089 $ 3,686,576 December 31, 2017 Retail Installment Contracts Held for Investment Loans Acquired Individually Purchased Receivables Portfolios Total Principal, 30-59 days past due $ 2,822,686 $ 4,992 $ 2,827,678 Delinquent principal over 59 days (a) 1,541,728 2,855 1,544,583 Total delinquent principal $ 4,364,414 $ 7,847 $ 4,372,261 (a) Interest is generally accrued until 60 days past due in accordance with the Company's accounting policy for retail installment contracts. In addition, retail installment contracts acquired individually held for investment that were placed on nonaccrual status, as of June 30, 2018 and December 31, 2017 : June 30, 2018 December 31, 2017 Amount Percent (a) Amount Percent (a) Non-TDR $ 505,399 1.8 % $ 666,926 2.6 % TDR 1,554,860 5.7 % 1,390,373 5.4 % Total nonaccrual principal $ 2,060,259 7.5 % $ 2,057,299 7.9 % (a) Percent of unpaid principal balance of retail installment contracts individually held for investment. The balances in the above tables reflect total unpaid principal balance rather than net recorded investment before allowance. As of June 30, 2018 and December 31, 2017 , there were no receivables from dealers that were 30 days or more delinquent. As of June 30, 2018 and December 31, 2017 , there were $482 and $1,701 , respectively, of retail installment contracts held for sale that were 30 days or more delinquent. Credit Quality Indicators FICO ® Distribution — A summary of the credit risk profile of the Company’s retail installment contracts held for investment by FICO ® distribution, determined at origination, as of June 30, 2018 and December 31, 2017 was as follows: FICO ® Band June 30, 2018 (b) December 31, 2017 (b) Commercial (a) 1.9% 2.5% No-FICOs 11.3% 11.2% <540 21.0% 21.8% 540-599 32.6% 32.0% 600-639 17.8% 17.4% >640 15.4% 15.1% (a) No FICO score is obtained on loans to commercial borrowers. (b) Percentages are based on unpaid principal balance. Commercial Lending — The Company's risk department performs a credit analysis and classifies certain loans over an internal threshold based on the commercial lending classifications described in Note 4 of the 2017 Annual Report on Form 10-K. Fleet loan credit quality indicators for retail installment contracts held for investment with commercial borrowers as of June 30, 2018 and December 31, 2017 were as follows: June 30, December 31, Pass $ 9,974 $ 12,276 Special Mention 4,265 5,324 Substandard 434 715 Doubtful — — Loss — — Total (Unpaid principal balance) $ 14,673 $ 18,315 Commercial loan credit quality indicators for receivables from dealers held for investment as of June 30, 2018 and December 31, 2017 were as follows: June 30, December 31, Pass $ 15,167 $ 14,130 Special Mention 33 1,657 Substandard — — Doubtful — — Loss — — Total (Unpaid principal balance) $ 15,200 $ 15,787 Troubled Debt Restructurings In certain circumstances, the Company modifies the terms of its finance receivables to troubled borrowers. Modifications may include a temporary reduction in monthly payment, reduction in interest rate, an extension of the maturity date, rescheduling of future cash flows, or a combination thereof. A modification of finance receivable terms is considered a TDR if the Company grants a concession to a borrower for economic or legal reasons related to the debtor’s financial difficulties that 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. Additionally, restructurings through bankruptcy proceedings are deemed to be TDRs. The purchased receivables portfolio, operating and capital leases, and loans held for sale, including personal loans, are excluded from the scope of the applicable guidance. The Company's TDR balance as of June 30, 2018 and December 31, 2017 primarily consisted of loans that had been deferred or modified to receive a temporary reduction in monthly payment. As of June 30, 2018 and December 31, 2017 , there were no receivables from dealers classified as a TDR. For loans not classified as TDRs, the Company generally estimates an appropriate allowance for credit losses 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, it is generally assessed for impairment based on the present value of expected future cash flows discounted at the loan's original effective interest rate considering all available evidence. For loans that are considered collateral-dependent, such as certain bankruptcy modifications, impairment is measured based on the fair value of the collateral, less its estimated cost to sell. The table below presents the Company’s TDRs as of June 30, 2018 and December 31, 2017 : June 30, December 31, 2017 Retail Installment Contracts Outstanding recorded investment (a) $ 5,932,209 $ 6,261,432 Impairment (1,496,580 ) (1,731,320 ) Outstanding recorded investment, net of impairment $ 4,435,629 $ 4,530,112 (a) As of June 30, 2018 , the outstanding recorded investment excludes $78.3 million of collateral-dependent bankruptcy TDRs that has been written down by $33.2 million to fair value less cost to sell. As of December 31, 2017 , the outstanding recorded investment excludes $64.7 million of collateral-dependent bankruptcy TDRs that has been written down by $29.2 million to fair value less cost to sell. A summary of the Company’s delinquent TDRs at June 30, 2018 and December 31, 2017 , is as follows: June 30, December 31, 2017 Retail Installment Contracts (a) Principal, 30-59 days past due $ 1,202,120 $ 1,332,239 Delinquent principal over 59 days 599,760 818,938 Total delinquent TDR principal $ 1,801,880 $ 2,151,177 (a) The balances in the above table reflects total unpaid principal balance rather than net recorded investment before allowance. A summary of the Company’s TDRs that were placed on nonaccrual status at June 30, 2018 and December 31, 2017 , is as follows: June 30, December 31, 2017 Retail Installment Contracts (a) TDRs on cost recovery method (b) $ 1,161,487 $ 790,461 TDRs on cash basis accounting 393,373 599,912 Total nonaccrual TDR principal $ 1,554,860 $ 1,390,373 (a) The balances in the above table reflects total unpaid principal balance rather than net recorded investment before allowance. (b) Out of the total TDRs on cost recovery method, $1,022,007 and $652,679 of TDRs were less than 60 days past due as of June 30, 2018 and December 31, 2017 , respectively. The Company applied $142,523 and $56,740 of interest received, on these loans, towards recorded investment (as compared to interest income), in accordance with cost recovery method as of June 30, 2018 and December 31, 2017 , respectively. Average recorded investment and income recognized on TDR loans are as follows: Three Months Ended June 30, 2018 June 30, 2017 Retail Installment Contracts Average outstanding recorded investment in TDRs $ 5,978,346 $ 5,860,748 Interest income recognized $ 202,788 $ 224,810 Six Months Ended June 30, 2018 June 30, 2017 Retail Installment Contracts Average outstanding recorded investment in TDRs $ 6,084,560 $ 5,786,429 Interest income recognized $ 443,999 $ 485,162 The following table summarizes the financial effects, excluding impacts related to credit loss allowance and impairment, of TDRs (including collateral-dependent bankruptcy TDRs) that occurred for the three and six months ended June 30, 2018 and 2017 : Three Months Ended June 30, 2018 June 30, 2017 Retail Installment Contracts Outstanding recorded investment before TDR $ 723,925 $ 773,629 Outstanding recorded investment after TDR $ 725,438 $ 787,278 Number of contracts (not in thousands) 43,265 44,598 Six Months Ended June 30, 2018 June 30, 2017 Retail Installment Contracts Outstanding recorded investment before TDR $ 1,308,373 $ 1,655,328 Outstanding recorded investment after TDR $ 1,308,102 $ 1,653,556 Number of contracts (not in thousands) 77,639 94,097 Loan restructurings accounted for as TDRs within the previous twelve months that subsequently defaulted during the three and six months ended June 30, 2018 and 2017 are summarized in the following table: Three Months Ended June 30, 2018 June 30, 2017 Retail Installment Contracts Recorded investment in TDRs that subsequently defaulted (a) $ 144,561 $ 190,467 Number of contracts (not in thousands) 8,707 10,622 Six Months Ended June 30, 2018 June 30, 2017 Retail Installment Contracts Recorded investment in TDRs that subsequently defaulted (a) $ 339,826 $ 402,164 Number of contracts (not in thousands) 20,247 22,516 (a) For TDR modifications and TDR modifications that subsequently defaults, the allowance methodology remains unchanged; however, the transition rates of the TDR loans are adjusted to reflect the respective risks.

Debt

Debt	6 Months Ended
	Jun. 30, 2018
Debt Disclosure [Abstract]
Debt	Debt Revolving Credit Facilities The following table presents information regarding credit facilities as of June 30, 2018 and December 31, 2017 : June 30, 2018 Maturity Date(s) Utilized Balance Committed Amount Effective Rate Assets Pledged Restricted Cash Pledged Facilities with third parties: Warehouse line August 2019 $ 287,484 $ 500,000 3.56% $ 410,567 $ 24,525 Warehouse line Various (a) 518,345 1,250,000 3.36% 780,594 5,068 Warehouse line (b) August 2019 1,832,943 3,900,000 3.86% 2,310,677 10,261 Warehouse line December 2018 115,100 300,000 4.01% 181,621 855 Warehouse line October 2019 364,777 1,800,000 4.44% 529,183 180 Repurchase facility (d) Various (c) 179,934 179,934 3.78% 259,860 17,818 Repurchase facility (d) July 2018 (e) 92,167 92,167 3.51% 129,440 — Repurchase facility (d) September 2018 68,682 68,682 3.56% 92,358 — Repurchase facility (d) December 2018 115,307 115,307 3.58% 156,202 — Warehouse line November 2019 417,499 1,000,000 3.17% 632,984 8 Warehouse line October 2019 217,465 400,000 3.45% 328,840 158 Warehouse line November 2019 78,620 500,000 5.06% 89,182 411 Warehouse line October 2018 214,500 300,000 3.66% 248,608 333 Total facilities with third parties 4,502,823 10,406,090 6,150,116 59,617 Facilities with Santander and related subsidiaries: Line of credit (f) December 2018 — 1,000,000 3.09% — — Promissory Note (g) December 2022 250,000 250,000 3.95% — — Promissory Note (g) December 2021 250,000 250,000 3.70% — — Promissory Note (g) March 2019 300,000 300,000 3.38% — — Promissory Note (g) October 2020 400,000 400,000 3.10% — — Promissory Note (g) May 2020 500,000 500,000 3.49% — — Promissory Note (g) (h) March 2022 650,000 650,000 4.20% — — Promissory Note (g) August 2021 650,000 650,000 3.44% — — Line of credit (f) December 2018 122,200 750,000 4.60% 129,268 538 Line of credit (f) March 2019 — 3,000,000 3.94% — — Total facilities with Santander and related subsidiaries 3,122,200 7,750,000 129,268 538 Total revolving credit facilities $ 7,625,023 $ 18,156,090 $ 6,279,384 $ 60,155 (a) One-half of the outstanding balance on this facility matures in March 2019 and remaining balance matures in March 2020. (b) This line is held exclusively for financing of Chrysler Capital leases. (c) The maturity of this repurchase facility ranges from July 2018 to September 2018. Approximately 38% of this was matured and settled in July 2018. (d) These repurchase facilities are collateralized by securitization notes payable retained by the Company. These facilities have rolling maturities of up to one year . As the borrower, we are exposed to liquidity risk due to changes in the market value of the retained securities pledged. In some instances, we place or receive cash collateral with counterparties under collateral arrangements associated with our repurchase agreements. (e) This repurchase facility was settled on maturity in July 2018. (f) These lines are also collateralized by securitization notes payable and residuals retained by the Company. (g) As of June 30, 2018 and December 31, 2017 , $3,000,000 and $3,000,000 , respectively, of the aggregate outstanding balances on these facilities were unsecured. (h) In 2017, the Company entered into an interest rate swap to hedge the interest rate risk on this fixed rate debt. This derivative was designated as fair value hedge at inception. This was later terminated and the unamortized fair value hedge adjustment as of June 30, 2018 and December 31, 2017 was $3,763 and $4,223 , respectively, the amortization of which will reduce interest expense over the remaining life of the fixed rate debt. December 31, 2017 Maturity Date(s) Utilized Balance Committed Amount Effective Rate Assets Pledged Restricted Cash Pledged Facilities with third parties: Warehouse line January 2018 $ 336,484 $ 500,000 2.87% $ 473,208 $ — Warehouse line Various 339,145 1,250,000 2.53% 461,353 12,645 Warehouse line August 2019 2,044,843 3,900,000 2.96% 2,929,890 53,639 Warehouse line December 2018 — 300,000 1.49% — — Warehouse line October 2019 226,577 1,800,000 4.95% 311,336 6,772 Repurchase facility Various 325,775 325,775 3.24% 474,188 13,842 Repurchase facility April 2018 202,311 202,311 2.67% 264,120 — Repurchase facility March 2018 147,500 147,500 3.91% 222,108 — Repurchase facility March 2018 68,897 68,897 3.04% 95,762 — Warehouse line November 2019 403,999 1,000,000 2.66% 546,782 14,729 Warehouse line October 2019 81,865 400,000 4.09% 114,021 3,057 Warehouse line November 2019 435,220 500,000 1.92% 521,365 16,866 Warehouse line October 2018 235,700 300,000 2.84% 289,634 10,474 Total facilities with third parties 4,848,316 10,694,483 6,703,767 132,024 Facilities with Santander and related subsidiaries: Line of credit December 2018 — 1,000,000 3.09% — — Promissory Note December 2021 250,000 250,000 3.70% — — Promissory Note December 2022 250,000 250,000 3.95% — — Promissory Note March 2019 300,000 300,000 2.67% — — Promissory Note October 2020 400,000 400,000 3.10% — — Promissory Note May 2020 500,000 500,000 3.49% — — Promissory Note March 2022 650,000 650,000 4.20% — — Promissory Note August 2021 650,000 650,000 3.44% — — Line of credit December 2018 750,000 750,000 1.33% — — Line of credit March 2019 — 3,000,000 3.94% — — Total facilities with Santander and related subsidiaries 3,750,000 7,750,000 — — Total revolving credit facilities $ 8,598,316 $ 18,444,483 $ 6,703,767 $ 132,024 Facilities with Third Parties The warehouse lines and repurchase facilities are fully collateralized by a designated portion of the Company’s retail installment contracts (Note 2), leased vehicles (Note 3), securitization notes payables and residuals retained by the Company. Facilities with Santander and Related Subsidiaries Lines of Credit Through SHUSA, Santander provides the Company with $3,000,000 of committed revolving credit that can be drawn on an unsecured basis. Through its New York branch, Santander provides the Company with $1,750,000 of long-term committed revolving credit facilities. The $1,750,000 of longer-term committed revolving credit facilities is composed of a $1,000,000 facility that permits unsecured borrowing but is generally collateralized by retained residuals and $750,000 facility that is securitized by Prime retail installment loans. The $1,000,000 line of credit was terminated in July 2018 and replaced with a $500,000 line of credit with SHUSA. Promissory Notes Through SHUSA, Santander provides the Company with $3,000,000 of promissory notes. Secured Structured Financings The following table presents information regarding secured structured financings as of June 30, 2018 and December 31, 2017 : June 30, 2018 Estimated Maturity Date(s) Balance Initial Note Amounts Issued Initial Weighted Average Interest Rate Collateral (b) Restricted Cash 2014 Securitizations February 2020 - April 2022 $ 830,449 $ 6,391,020 1.16% - 1.72% $ 995,784 $ 204,967 2015 Securitizations April 2021 - January 2023 2,075,021 9,054,732 1.33% - 2.29% 2,634,724 343,060 2016 Securitizations April 2022 - March 2024 2,694,694 7,462,790 1.63% - 2.80% 3,723,193 321,888 2017 Securitizations April 2023 - September 2024 5,646,607 9,296,570 1.35% - 2.52% 7,666,331 419,569 2018 Securitizations December 2022 - October 2025 7,349,419 7,677,570 2.41% - 3.53% 8,811,769 299,108 Public Securitizations (a) 18,596,190 39,882,682 23,831,801 1,588,592 2011 Private issuance September 2028 153,881 1,700,000 1.46% 277,894 102 2013 Private issuances August 2021-September 2024 1,391,968 2,044,054 1.28% - 1.38% 2,558,503 5,383 2014 Private issuance November 2021 52,955 1,239,271 1.10% - 1.40% 136,946 6,649 2015 Private issuances July 2019 - September 2021 1,413,139 2,305,062 0.88% - 2.80% 460,556 2,986 2016 Private issuances May 2020 - September 2024 892,712 3,050,000 1.55% - 2.86% 1,410,208 3,113 2017 Private issuances April 2021 - September 2021 991,766 1,600,000 1.85% - 2.44% 1,215,294 5,992 2018 Private issuance June 2022 - January 2023 808,209 1,000,002 2.42% - 2.89% 938,604 2,450 Privately issued amortizing notes 5,704,630 12,938,389 6,998,005 26,675 Total secured structured financings $ 24,300,820 $ 52,821,071 $ 30,829,806 $ 1,615,267 (a) Securitizations executed under Rule 144A of the Securities Act are included within this balance. (b) Secured structured financings may be collateralized by the Company's collateral overages of other issuances. December 31, 2017 Estimated Maturity Date(s) Balance Initial Note Amounts Issued Initial Weighted Average Interest Rate Collateral Restricted Cash 2013 Securitizations January 2019 - March 2021 $ 418,806 $ 4,239,700 0.89% - 1.59% $ 544,948 $ 125,696 2014 Securitizations February 2020 - April 2022 1,150,422 6,391,020 1.16% - 1.72% 1,362,814 210,937 2015 Securitizations September 2019 - January 2023 2,484,051 9,171,332 1.33% - 2.29% 3,465,671 366,062 2016 Securitizations April 2022 - March 2024 3,596,822 7,462,790 1.63% - 2.80% 4,798,807 344,899 2017 Securitizations April 2023 - September 2024 7,343,157 9,535,800 2.01% - 2.52% 9,701,381 422,865 Public Securitizations 14,993,258 36,800,642 19,873,621 1,470,459 2011 Private issuance September 2028 281,946 1,700,000 1.46% 398,051 20,356 2013 Private issuances August 2021 - September 2024 2,292,279 2,044,054 1.28% - 1.38% 3,719,148 155,066 2014 Private issuances March 2018 - November 2021 117,730 1,538,087 1.05% - 1.40% 231,997 9,552 2015 Private issuances November 2018 - September 2021 2,009,627 2,305,062 0.88% - 4.09% 988,247 55,451 2016 Private issuances May 2020 - September 2024 1,489,464 3,050,000 1.55% - 2.86% 2,147,988 89,460 2017 Private issuances April 2021 - September 2021 1,373,591 1,641,079 1.85% - 2.27% 1,747,227 47,415 Privately issued amortizing notes 7,564,637 12,278,282 9,232,658 377,300 Total secured structured financings $ 22,557,895 $ 49,078,924 $ 29,106,279 $ 1,847,759 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. The Company’s securitizations and private issuances are collateralized by vehicle retail installment contracts and loans or leases. As of June 30, 2018 and December 31, 2017 , the Company had private issuances of notes backed by vehicle leases totaling $6,016,507 and $3,710,377 , respectively. Unamortized debt issuance costs are amortized as interest expense over the terms of the related notes payable using the effective interest method and are classified as a discount to the related recorded debt balance. Amortized debt issuance costs were $8,580 and $8,377 for the three months ended June 30, 2018 and 2017 , respectively, and $16,500 and $17,106 for the six months ended June 30, 2018 and 2017 , respectively. For securitizations, the term takes into consideration the expected execution of the contractual call option, if applicable. Amortization of premium or accretion of discount on notes payable is also included in interest expense using the effective interest method over the estimated remaining life of the notes. Total interest expense on secured structured financings for the three months ended June 30, 2018 and 2017 was $172,916 and $132,953 , respectively. Total interest expense on secured structured financings for the six months ended June 30, 2018 and 2017 was $323,591 and $257,018 , respectively.

Variable Interest Entities

Variable Interest Entities	6 Months Ended
	Jun. 30, 2018
Variable Interest Entity Disclosure [Abstract]
Variable Interest Entities	Variable Interest Entities The Company transfers retail installment contracts and vehicle leases into newly formed Trusts that then issue one or more classes of notes payable backed by the collateral. The Company’s continuing involvement with these Trusts is in the form of servicing the assets and, generally, through holding residual interests in the Trusts. The Trusts are considered VIEs under U.S. GAAP and the Company may or may not consolidate these VIEs on the condensed consolidated balance sheets. For further description of the Company’s securitization activities, involvement with VIEs and accounting policies regarding consolidation of VIEs, see Note 7 of the 2017 Annual Report on Form 10-K. On-balance sheet variable interest entities The Company retains servicing rights 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, 2018 and December 31, 2017 , the Company was servicing $26,330,533 and $26,250,482 , respectively, of gross retail installment contracts that have been transferred to consolidated Trusts. The remainder of the Company’s retail installment contracts remain unpledged. A summary of the cash flows received from consolidated securitization trusts during the three and six months ended June 30, 2018 and 2017 , is as follows: Three Months Ended Six Months Ended June 30, 2018 June 30, 2017 June 30, 2018 June 30, 2017 Assets securitized $ 6,511,953 $ 4,750,103 $ 13,752,897 $ 12,396,728 Net proceeds from new securitizations (a) $ 4,581,874 $ 3,485,091 $ 8,058,196 $ 9,061,892 Net proceeds from sale of retained bonds 382,022 157,763 593,632 273,733 Cash received for servicing fees (b) 213,900 215,994 429,690 424,917 Net distributions from Trusts (b) 780,834 729,557 1,325,986 1,407,786 Total cash received from Trusts $ 5,958,630 $ 4,588,405 $ 10,407,504 $ 11,168,328 (a) Includes additional advances on existing securitizations. (b) These amounts are not reflected in the accompanying condensed consolidated statements of cash flows because these cash flows are intra-company and eliminated in consolidation. Off-balance sheet variable interest entities During the three and six months ended June 30, 2018 the Company sold $1,156,060 and $2,631,313 , respectively, of gross retail installment contracts to VIEs in off-balance sheet securitizations for a loss (excluding lower of cost or market adjustments, if any) of $3,177 and $20,080 , respectively. During the three and six months ended June 30, 2017 the Company sold $536,309 and $1,236,331 respectively, of gross retail installment contracts to VIEs in off-balance securitizations for a loss of $3,461 and $6,180 , respectively. The losses are recorded in investment losses, net in the accompanying condensed consolidated statements of income. These transactions were executed under securitization platforms with Santander. S antander, as a majority owned affiliate, holds eligible vertical interest in Notes and Certificates of not less than 5% to comply with the Dodd-Frank Act risk retention rules. As of June 30, 2018 and December 31, 2017 , the Company was servicing $4,927,722 and $3,428,248 , respectively, of gross retail installment contracts that have been sold in off-balance sheet securitizations and were subject to an optional clean-up call. The portfolio was comprised as follows: June 30, 2018 December 31, 2017 SPAIN $ 3,967,665 $ 2,024,016 Total serviced for related parties 3,967,665 2,024,016 Chrysler Capital securitizations 960,057 1,404,232 Total serviced for third parties 960,057 1,404,232 Total serviced for others portfolio $ 4,927,722 $ 3,428,248 Other than repurchases of sold assets due to standard representations and warranties, the Company has no exposure to loss as a result of its involvement with these VIEs. A summary of the cash flows received from off-balance sheet securitization trusts during the three and six months ended June 30, 2018 and 2017 is as follows: Three Months Ended Six Months Ended June 30, 2018 June 30, 2017 June 30, 2018 June 30, 2017 Receivables securitized (a) $ 1,156,060 $ 536,309 $ 2,631,313 $ 1,236,331 Net proceeds from new securitizations $ 1,160,119 $ 538,478 $ 2,634,939 $ 1,240,797 Cash received for servicing fees 12,616 11,970 20,694 13,368 Total cash received from securitization trusts $ 1,172,735 $ 550,448 $ 2,655,633 $ 1,254,165 (a) Represents the unpaid principal balance at the time of original securitization.

Derivative Financial Instrument

Derivative Financial Instruments	6 Months Ended
	Jun. 30, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Financial Instruments	Derivative Financial Instruments The Company uses derivatives financial instruments such as a) interest rate swaps; b) interest rate caps; and c) the corresponding options written in order to offset the interest rate caps to manage the Company's exposure to changing interest rates. The Company uses both derivatives that qualify for hedge accounting treatment and economic hedges. In addition, 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, 2018 and December 31, 2017 . The underlying notional amounts and aggregate fair values of these derivatives financial instruments at June 30, 2018 and December 31, 2017 , are as follows: June 30, 2018 Notional Fair Value Asset Liability Interest rate swap agreements designated as cash flow hedges $ 4,197,700 $ 74,110 $ 74,110 $ — Interest rate swap agreements not designated as hedges 2,613,800 19,596 19,596 — Interest rate cap agreements 9,207,853 198,933 198,933 — Options for interest rate cap agreements 9,207,853 (199,131 ) — (199,131 ) December 31, 2017 Notional Fair Value Asset Liability Interest rate swap agreements designated as cash flow hedges $ 4,926,900 $ 45,986 $ 45,986 $ — Interest rate swap agreements not designated as hedges 1,736,400 9,596 9,596 — Interest rate cap agreements 10,906,081 103,721 135,830 (32,109 ) Options for interest rate cap agreements 10,906,081 (103,659 ) 32,165 (135,824 ) See Note 13 for disclosure of fair value and balance sheet location of the Company's derivative financial instruments. The Company enters into legally enforceable master netting agreements that 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. The Company has elected to present derivative balances on a gross basis even if the derivative is subject to a legally enforceable master netting (ISDA) agreement. Collateral that is received or pledged for these transactions is disclosed within the “Gross amounts not offset in the Condensed Consolidated Balance Sheet” section of the tables below. Information on the offsetting of derivative assets and derivative liabilities due to the right of offset was as follows, as of June 30, 2018 and December 31, 2017 : Gross Amounts Not Offset in the Assets Presented Cash Net June 30, 2018 Interest rate swaps - third party (b) $ 93,706 $ (61,355 ) $ 32,351 Interest rate caps - Santander and affiliates 14,111 (12,240 ) 1,871 Interest rate caps - third party 184,822 (81,597 ) 103,225 Total derivatives subject to a master netting arrangement or similar arrangement 292,639 (155,192 ) 137,447 Total derivatives not subject to a master netting arrangement or similar arrangement — — — Total derivative assets $ 292,639 $ (155,192 ) $ 137,447 Total financial assets $ 292,639 $ (155,192 ) $ 137,447 December 31, 2017 Interest rate swaps - Santander and affiliates $ 8,621 $ (3,461 ) $ 5,160 Interest rate swaps - third party 46,961 (448 ) 46,513 Interest rate caps - Santander and affiliates 18,201 (12,240 ) 5,961 Interest rate caps - third party 149,794 (55,835 ) 93,959 Total derivatives subject to a master netting arrangement or similar arrangement 223,577 (71,984 ) 151,593 Total derivatives not subject to a master netting arrangement or similar arrangement — — — Total derivative assets $ 223,577 $ (71,984 ) $ 151,593 Total financial assets $ 223,577 $ (71,984 ) $ 151,593 (a) Cash collateral received is reported in Other liabilities or Due to affiliate, as applicable, in the consolidated balance sheet. (b) Includes derivative instruments originally transacted with Santander and affiliates and subsequently amended to reflect clearing with central clearing counterparties. Gross Amounts Not Offset in the Liabilities Presented Cash Net June 30, 2018 Back to back - Santander & affiliates $ 14,111 $ (14,111 ) $ — Back to back - third party 185,020 (185,020 ) — Total derivatives subject to a master netting arrangement or similar arrangement 199,131 (199,131 ) — Total derivatives not subject to a master netting arrangement or similar arrangement — — — Total derivative liabilities $ 199,131 $ (199,131 ) $ — Total financial liabilities $ 199,131 $ (199,131 ) $ — December 31, 2017 Back to back - Santander & affiliates 18,201 (18,201 ) — Back to back - third party 149,732 (133,540 ) 16,192 Total derivatives subject to a master netting arrangement or similar arrangement 167,933 (151,741 ) 16,192 Total derivatives not subject to a master netting arrangement or similar arrangement — — — Total derivative liabilities $ 167,933 $ (151,741 ) $ 16,192 Total financial liabilities $ 167,933 $ (151,741 ) $ 16,192 (a) Cash collateral pledged is reported in Other assets or Due from affiliate, as applicable, in the consolidated balance sheet. In certain instances, the Company is over-collateralized since the actual amount of cash pledged as collateral exceeds the associated financial liability. As a result, the actual amount of cash collateral pledged that is reported in Other assets or Due from affiliates may be greater than the amount shown in the table above. The gross gains (losses) reclassified from accumulated other comprehensive income (loss) to net income, are included as components of interest expense. The impacts on the condensed consolidated statements of income and comprehensive income for the three and six months ended June 30, 2018 and 2017 were as follows: Three Months Ended June 30, 2018 Recognized in Earnings Gross Gains Recognized in Accumulated Other Comprehensive Income (Loss) Gross amount Reclassified From Accumulated Other Comprehensive Interest rate swap agreements designated as cash flow hedges $ — $ 8,412 $ 9,095 Total $ — $ 8,412 $ 9,095 Derivative instruments not designated as hedges Losses (Gains) recognized in interest expenses (22 ) Three Months Ended June 30, 2017 Recognized in Earnings Gross Gains (Losses) Recognized in Accumulated Other Comprehensive Income (Loss) Gross Gains (Losses) Reclassified From Accumulated Other Comprehensive Interest rate swap agreements designated as cash flow hedges $ (9,895 ) $ (2,217 ) $ (8,859 ) Interest rate swap agreements designated as fair value hedges $ 1,232 $ — $ — Total $ (8,663 ) $ (2,217 ) $ (8,859 ) Derivative instruments not designated as hedges Losses (Gains) recognized in operating expenses $ (272 ) Six Months Ended June 30, 2018 Recognized in Earnings Gross Gains Recognized in Accumulated Other Comprehensive Income (Loss) Gross amount Reclassified From Accumulated Other Comprehensive Interest rate swap agreements designated as cash flow hedges $ — $ 34,841 $ 13,672 Total $ — $ 34,841 $ 13,672 Derivative instruments not designated as hedges: Losses (Gains) recognized in interest expenses $ (9,739 ) Six Months Ended June 30, 2017 Recognized in Earnings Gross Gains Recognized in Accumulated Other Comprehensive Income (Loss) Gross amount Reclassified From Accumulated Other Comprehensive Interest rate swap agreements designated as cash flow hedges $ (9,512 ) $ 5,115 $ (4,619 ) Interest rate swap agreements designated as fair value hedges $ 1,232 — — Total $ (8,280 ) $ 5,115 $ (4,619 ) Derivative instruments not designated as hedges: Losses (Gains) recognized in operating expenses $ 426 The Company estimates that approximately $41,548 of unrealized gains included in accumulated other comprehensive income (loss) will be reclassified to interest expense within the next twelve months.

Other Assets

Other Assets	6 Months Ended
	Jun. 30, 2018
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Other Assets	Other Assets Other assets were comprised as follows: June 30, December 31, Vehicles (a) $ 254,086 $ 293,546 Manufacturer subvention payments receivable (b) 163,775 83,910 Upfront fee (b) 72,500 80,000 Derivative assets at fair value (c) 278,528 196,755 Derivative - third party collateral 190,609 149,805 Prepaids 30,459 40,830 Accounts receivable 26,459 38,583 Other 45,824 29,815 Other assets $ 1,062,240 $ 913,244 (a) Includes vehicles recovered through repossession as well as vehicles recovered due to lease terminations. (b) These amounts relate to the Chrysler Agreement. The Company paid a $150,000 upfront fee upon the May 2013 inception of the Chrysler Agreement. The fee is being amortized into finance and other interest income over a ten -year term. As the preferred financing provider for FCA, the Company is entitled to subvention payments on loans and leases with below-market customer payments. Exercise of the equity option by FCA would be considered a triggering event requiring re-evaluation of whether or not the remaining unamortized balance of the upfront fee should be impaired. FCA has not yet delivered to the Company a notice of intent to exercise its option. (c) Derivative assets at fair value represent the gross amount of derivatives presented in the condensed consolidated financial statements. Refer to Note 7 to these Condensed Consolidated Financial Statements for the detail of these amounts.

Income Taxes

Income Taxes	6 Months Ended
	Jun. 30, 2018
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The Company recorded income tax expense of $114,004 ( 25.4% effective tax rate) and $83,433 ( 24.0% effective tax rate) during the three months ended June 30, 2018 and 2017 , respectively. The Company recorded income tax expense of $171,315 ( 22.9% effective tax rate) and $161,434 ( 28.3% effective tax rate) during the six months ended June 30, 2018 and 2017 , respectively. The Company is a party to a tax sharing agreement requiring that the unitary state tax liability among affiliates included in unitary state tax returns be allocated using the hypothetical separate company tax calculation method. The Company had a net receivable from affiliates under the tax sharing agreement of $467 and $467 at June 30, 2018 and December 31, 2017 , respectively, which was included in related party taxes receivable in the condensed consolidated balance sheet. The Company provides U.S. income taxes on earnings of foreign subsidiaries unless the subsidiaries' earnings are considered indefinitely reinvested outside of the United States. As of December 31, 2017 and June 30, 2018 , the Company has no earnings that are considered indefinitely reinvested. During the six months ended June 30, 2018 , the Company adopted ASU 2018-02, Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income. This standard requires entities to reclassify from accumulated other comprehensive income to retained earnings stranded tax effects resulting from the 2017 Tax Cuts and Jobs Act. The Company reclassified $6,149 related to stranded tax effects. The Company applies an aggregate portfolio approach whereby income tax effects from accumulated other comprehensive income are released only when an entire portfolio (i.e. all related units of account) of a particular type is liquidated, sold or extinguished. 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 Company's business, financial position or results of operations. The reserve for uncertain tax positions, as well as associated penalties and interest, is a component of the income tax provision.

Commitments and Contingencies

Commitments and Contingencies	6 Months Ended
	Jun. 30, 2018
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies The following table summarizes liabilities recorded for commitments and contingencies as of June 30, 2018 and December 31, 2017 , all of which are included in accounts payable and accrued expenses in the accompanying condensed consolidated balance sheets: Agreement or Legal Matter Commitment or Contingency June 30, 2018 December 31, 2017 Chrysler Agreement Revenue-sharing and gain-sharing payments $ 11,053 $ 6,580 Agreement with Bank of America Servicer performance fee 6,996 8,072 Agreement with CBP Loss-sharing payments 4,977 5,625 Other Contingencies Consumer arrangements 14,339 6,326 Legal and regulatory proceedings Aggregate legal and regulatory liabilities 112,500 108,800 Following is a description of the agreements and legal matters pursuant to which the liabilities in the preceding table were recorded. Chrysler Agreement Under terms of the Chrysler Agreement, the Company must make revenue sharing payments to FCA and also must make gain-sharing payments to FCA when residual gains on leased vehicles exceed a specified threshold. The Company had accrued $11,053 and $ 6,580 at June 30, 2018 and December 31, 2017 , respectively, related to these obligations. The Chrysler Agreement requires, among other things, that the Company bear the risk of loss on loans originated pursuant to the agreement, but also that FCA shares in any residual gains and losses from consumer leases. The agreement also requires that the Company maintain at least $5.0 billion in funding available for Floorplan Loans and $4.5 billion of financing dedicated to FCA retail financing. In turn, FCA must provide designated minimum threshold percentages of its subvention business to the Company. The Chrysler Agreement is subject to early termination in certain circumstances, including the failure by either party to comply with certain of their ongoing obligations under the Chrysler Agreement. These obligations include the Company's meeting specified escalating penetration rates for the first five years of the agreement. The Company did not meet these penetration rates. Also, FCA has the option to acquire, for fair market value, an equity participation in the business offering and providing the financial services contemplated by the Chrysler Agreement. If FCA exercises its purchase option, the Chrysler Agreement were to terminate, or the Company otherwise is unable to realize the expected benefits of its relationship with FCA, there could be a materially adverse impact to the Company’s business, financial condition, results of operations, profitability, loan and lease volume, the credit quality of its portfolio, liquidity, funding and growth, and the Company's ability to implement its business strategy could be materially adversely affected. Agreement with Bank of America Until January 2017, the Company had a flow agreement with Bank of America whereby the Company was committed to selling up to $300,000 of eligible loans to the bank each month. The Company retains servicing on all sold loans and may receive or pay a servicer performance payment based on an agreed-upon formula if performance on the sold loans is better or worse, respectively, than expected performance at time of sale. Servicer performance payments are due six years from the cut-off date of each loan sale. The Company had accrued $6,996 and $8,072 at June 30, 2018 and December 31, 2017 , respectively, related to this obligation. Agreement with CBP Until May 1, 2017, the Company sold loans to CBP under terms of a flow agreement and predecessor sale agreements. The Company retained 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. Loss-sharing payments are due the month in which net losses exceed the established threshold of each loan sale. The Company had accrued $4,977 and $5,625 at June 30, 2018 and December 31, 2017 , respectively, related to the loss-sharing obligation. Other Contingencies The Company is or may be subject to potential liability under various other contingent exposures. The Company had accrued $14,339 and $6,326 at June 30, 2018 and December 31, 2017 , respectively, for other miscellaneous contingencies. Legal and regulatory proceedings Periodically, the Company is party to, or otherwise involved in, various lawsuits and other legal proceedings that arise in the ordinary course of business. In view of the inherent difficulty of predicting the outcome of any such lawsuit, regulatory matter and legal proceeding, particularly where the claimants seek very large or indeterminate damages or where the matters present novel legal theories or involve a large number of parties, the Company generally cannot predict the eventual outcome of the pending matters, the timing of the ultimate resolution of the matters, or the eventual loss, fines or penalties related to the matter. Further, it is reasonably possible that actual outcomes or losses may differ materially from the Company's current assessments and estimates and any adverse resolution of any of these matters against it could materially and adversely affect the Company's business, financial condition and results of operation. In accordance with applicable accounting guidance, the Company establishes an accrued liability for litigation, regulatory matters and other legal proceedings when those matters present material loss contingencies that are both probable and estimable. In such cases, there may be an exposure to loss in excess of any amounts accrued. When a loss contingency is not both probable and estimable, the Company does not establish an accrued liability. As a litigation, regulatory matter or other legal proceeding develops, the Company, in conjunction with any outside counsel handling the matter, evaluates on an ongoing basis whether the matter presents a material loss contingency that is probable and estimable. If a determination is made during a given quarter that a material loss contingency is probable and estimable, an accrued liability is established during such quarter with respect to such loss contingency. The Company continues to monitor the matter for further developments that could affect the amount of the accrued liability previously established. As of June 30, 2018 , the Company has accrued aggregate legal and regulatory liabilities of $112,500 . Further, the Company believes that the estimate of the aggregate range of reasonably possible losses, in excess of reserves established, for legal and regulatory proceedings is up to $207,000 as of June 30, 2018 . Set forth below are descriptions of the material lawsuits, regulatory matters and other legal proceedings to which the Company is subject. Securities Class Action and Shareholder Derivative Lawsuits • Deka Lawsuit: The Company is a defendant in a purported securities class action lawsuit (the Deka Lawsuit) in the United States District Court, Northern District of Texas, captioned Deka Investment GmbH et al. v. Santander Consumer USA Holdings Inc. et al., No. 3:15-cv-2129-K. The Deka Lawsuit, which was filed in August 26, 2014, was brought against the Company, certain of its current and former directors and executive officers and certain institutions that served as underwriters in the Company’s IPO on behalf of a class consisting of those who purchased or otherwise acquired our securities between January 23, 2014 and June 12, 2014. The complaint alleges, among other things, that our IPO registration statement and prospectus and certain subsequent public disclosures violated federal securities laws by containing misleading statements concerning the Company’s ability to pay dividends and the adequacy of the Company’s compliance systems and oversight. On December 18, 2015, the Company and the individual defendants moved to dismiss the lawsuit, which was denied. On December 2, 2016, the plaintiffs moved to certify the proposed classes. On July 11, 2017, the court entered an order staying the Deka Lawsuit pending the resolution of the appeal of a class certification order in In re Cobalt Int’l Energy, Inc. Sec. Litig., No. H-14-3428, 2017 U.S. Dist. LEXIS 91938 (S.D. Tex. June 15, 2017). • Feldman Lawsuit: On October 15, 2015, a shareholder derivative complaint was filed in the Court of Chancery of the State of Delaware, captioned Feldman v. Jason A. Kulas, et al., C.A. No. 11614 (the Feldman Lawsuit). The Feldman Lawsuit names as defendants current and former members of the Board, and names the Company as a nominal defendant. The complaint alleges, among other things, that the current and former director defendants breached their fiduciary duties in connection with overseeing the Company’s nonprime vehicle lending practices, resulting in harm to the Company. The complaint seeks unspecified damages and equitable relief. On December 29, 2015, the Feldman Lawsuit was stayed pending the resolution of the Deka Lawsuit. • Parmelee Lawsuit: The Company is a defendant in two purported securities class actions lawsuits that were filed in March and April 2016 in the United States District Court, Northern District of Texas. The lawsuits were consolidated and are now captioned Parmelee v. Santander Consumer USA Holdings Inc. et al., No. 3:16-cv-783. The lawsuits were filed against the Company and certain of its current and former directors and executive officers on behalf of a class consisting of all those who purchased or otherwise acquired our securities between February 3, 2015 and March 15, 2016. The complaint alleges that the Company violated federal securities laws by making false or misleading statements, as well as failing to disclose material adverse facts, in its periodic reports filed under the Exchange Act and certain other public disclosures, in connection with, among other things, the Company’s change in its methodology for estimating its allowance for credit losses and correction of such allowance for prior periods. On March 14, 2017, the Company filed a motion to dismiss the lawsuit. On January 3, 2018, the court granted the Company’s motion as to defendant Ismail Dawood (the Company’s former Chief Financial Officer) and denied the motion as to all other defendants. In July 2018, the lead plaintiff filed an unopposed motion for preliminary approval of a class action settlement of the lawsuit for a cash payment of $9,500 . • Jackie888 Lawsuit: On September 27, 2016, a shareholder derivative complaint was filed in the Court of Chancery of the State of Delaware, captioned Jackie888, Inc. v. Jason Kulas, et al., C.A. # 12775 (the Jackie888 Lawsuit). The Jackie888 Lawsuit names as defendants current and former members of the Board, and names the Company as a nominal defendant. The complaint alleges, among other things, that the defendants breached their fiduciary duties in connection with the Company’s accounting practices and controls. The complaint seeks unspecified damages and equitable relief. On April 13, 2017, the Jackie888 Lawsuit was stayed pending the resolution of the Deka Lawsuit. Consumer Lending Cases The Company is also party to various lawsuits pending in federal and state courts alleging violations of state and federal consumer lending laws, including, without limitation, the Equal Credit Opportunity Act, the Fair Debt Collection Practices Act, Fair Credit Reporting Act, Section 5 of the Federal Trade Commission Act, the Telephone Consumer Protection Act, the Truth in Lending Act, wrongful repossession laws, usury laws and laws related to unfair and deceptive acts or practices. In general, these cases seek damages and equitable and/or other relief. Regulatory Investigations and Proceedings The Company is party to, or is periodically otherwise involved in, reviews, investigations, examinations and proceedings (both formal and informal), and information-gathering requests, by government and self-regulatory agencies, including the FRBB, the CFPB, the DOJ, the SEC, the FTC and various state regulatory and enforcement agencies. Currently, such matters include, but are not limited to, the following: • The Company received a civil subpoena from the DOJ, under FIRREA, requesting the production of documents and communications that, among other things, relate to the underwriting and securitization of nonprime vehicle loans, and also from the SEC requesting the production of documents and communications that, among other things, relate to the underwriting and securitization of nonprime vehicle loans. The Company has responded to these requests within the deadlines specified in the subpoenas and has otherwise cooperated with the DOJ and SEC with respect to these matters. • In October 2014, May 2015, July 2015 and February 2017, the Company received subpoenas and/or Civil Investigative Demands (CIDs) from the Attorneys General of California, Illinois, Oregon, New Jersey, Maryland and Washington under the authority of each state's consumer protection statutes. The Company has been informed that these states serve as an executive committee on behalf of a group of 32 state Attorneys General. The subpoenas and/or CIDs from the executive committee states contain broad requests for information and the production of documents related to the Company’s underwriting, securitization, servicing and collection of nonprime vehicle loans. The Company has responded to these requests within the deadlines specified in the CIDs and has otherwise cooperated with the Attorneys General with respect to this matter. • In February 2016, the CFPB issued a supervisory letter relating to its investigation of the Company’s compliance systems, Board and senior management oversight, consumer complaint handling, marketing of GAP coverage and loan deferral disclosure practices. The Company subsequently received a series of CIDs from the CFPB requesting information and testimony regarding the Company’s marketing of GAP coverage and loan deferral disclosure practices. The Company has responded to these requests within the deadlines specified in the CIDs and has otherwise cooperated with the CFPB with respect to this matter. • In August 2017, the Company received a CID from the CFPB. The stated purpose of the CID is to determine whether the Company has complied with the Fair Credit Reporting Act and related regulations. The Company has responded to these requests within the deadlines specified in the CIDs and has otherwise cooperated with the CFPB with respect to this matter. These matters are ongoing and could in the future result in the imposition of damages, fines or other penalties. No assurance can be given that the ultimate outcome of these matters or any resulting proceedings would not materially and adversely affect the Company’s business, financial condition and results of operations. • 2017 Written Agreement with the Federal Reserve On March 21, 2017, the Company and SHUSA entered into a written agreement with the FRBB. Under the terms of the agreement, the Company is required to enhance its compliance risk management program, Board oversight of risk management and senior management oversight of risk management, and SHUSA is required to enhance its oversight of the Company's management and operations. • Mississippi Attorney General Lawsuit On January 10, 2017, the Attorney General of Mississippi filed a lawsuit against the Company in the Chancery Court of the First Judicial District of Hinds County, Mississippi, captioned State of Mississippi ex rel. Jim Hood, Attorney General of the State of Mississippi v. Santander Consumer USA Inc., C.A. # G-2017-28. The complaint alleges that the Company engaged in unfair and deceptive business practices to induce Mississippi consumers to apply for loans that they could not afford. The complaint asserts claims under the Mississippi Consumer Protection Act (the MCPA) and seeks unspecified civil penalties, equitable relief and other relief. On March 31, 2017, the Company filed motions to dismiss the lawsuit and subsequently filed a motion to stay the lawsuit pending the resolution of an interlocutory appeal relating to the MCPA before the Mississippi Supreme Court in Purdue Pharma, L.P., et al. v. State, No. 2017-IA- 00300-SCT. On September 25, 2017, the court granted the motion to stay and ordered a stay of all proceedings, excluding discovery and final briefing on motions to dismiss. • SCRA Consent Order In February 2015, the Company entered into a consent order with the DOJ, approved by the United States District Court for the Northern District of Texas, that resolves the DOJ’s claims against the Company that certain of its repossession and collection activities during the period of time between January 2008 and February 2013 violated the Servicemembers Civil Relief Act (SCRA). T he consent order requires the Company to pay a civil fine in the amount of $55 , as well as at least $9,360 to affected servicemembers consisting of $10 per servicemember plus compensation for any lost equity (with interest) for each repossession by the Company, and $5 per servicemember for each instance where the Company sought to collect repossession-related fees on accounts where a repossession was conducted by a prior account holder. The consent order also provides for monitoring by the DOJ for the Company’s SCRA compliance for a period of five years and requires the Company to undertake certain additional remedial measures. Agreements • Bluestem ◦ The Company is party to agreements with Bluestem whereby the Company is committed to purchase certain new advances on personal revolving financings receivables, along with existing balances on accounts with new advances, originated by Bluestem for an initial term ending in April 2020 and renewable through April 2022 at Bluestem's option. As of June 30, 2018 and December 31, 2017, the total unused credit available to customers was $3.8 billion , and $3.9 billion , respectively. In 2017, the Company purchased $1.2 billion of receivables, out of the $4.0 billion unused credit available to customers as of December 31, 2016. In addition, the Company purchased $263,831 of receivables related to newly opened customer accounts in 2017. During the six months ended June 30, 2018 , the Company purchased $0.5 billion of receivables, out of the $3.9 billion unused credit available to customers as of December 31, 2017. In addition, the Company purchased $83,842 of receivables related to newly opened customer accounts during the six months ended June 30, 2018 . ◦ Each customer account generated under the agreements generally is approved with a credit limit higher than the amount of the initial purchase, with each subsequent purchase automatically approved as long as it does not cause the account to exceed its limit and the customer is in good standing. As of June 30, 2018 and December 31, 2017 , the Company was obligated to purchase $15,667 and $11,539 , respectively, in receivables that had been originated by Bluestem but not yet purchased by the Company. The Company also is required to make a profit-sharing payment to Bluestem each month if performance exceeds a specified return threshold. During the year ended December 31, 2015, the Company and Bluestem executed an amendment that, among other provisions, increases the profit-sharing percentage retained by the Company, gives Bluestem the right to repurchase up to 9.99% of the existing portfolio at any time during the term of the agreement, and, provided that repurchase right is exercised, gives Bluestem the right to retain up to 20% of new accounts subsequently originated. SBNA ◦ 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. There were zero adjustments for the three and six months ended June 30, 2018 and June 30, 2017 . ◦ The Company provided SBNA with the first right to review and approve consumer vehicle lease applications, subject to volume constraints, under terms of a flow agreement that was terminated in May 2015. 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 consolidated balance sheets. As of June 30, 2018 , the balance in the collateral account is zero . In January 2015, the Company additionally agreed to indemnify SBNA for residual losses, up to a cap, on certain leases originated under the flow agreement for which SBNA and the Company had differing residual value expectations at lease inception. As of June 30, 2018 and December 31, 2017 , the Company had a recorded liability of $1,481 and $2,206 , respectively, related to the residual losses covered under the agreement. • Others ◦ Under terms of an application transfer agreement with Nissan, the Company has the first opportunity to review for its own portfolio any credit applications turned down by the Nissan's captive finance company. The agreement does not require the Company to originate any loans, but for each loan originated the Company will pay Nissan a referral fee . ◦ 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, 2018 , there were no loans that were the subject of a demand to repurchase or replace for breach of representations and warranties for the Company's asset-backed securities or other sales. In the opinion of management, the potential exposure of other recourse obligations related to the Company’s retail installment contract sales agreements is not expected to have a material adverse effect on the Company’s business, financial position, results of operations, or cash flows. ◦ Santander has provided guarantees on the covenants, agreements, and obligations of the Company under the governing documents of its warehouse lines and privately issued amortizing notes. These guarantees are limited to the obligations of the Company as servicer. ◦ In November 2015, the Company executed a forward flow asset sale agreement with a third party under terms of which the Company committed to sell $350,000 in charged off loan receivables in bankruptcy status on a quarterly basis . However, any sale more than $275,000 is subject to a market price check. As of June 30, 2018 and December 31, 2017 , the remaining aggregate commitment was $78,466 and $98,858 , respectively. Leases The Company has entered into various operating leases, primarily for office space and computer equipment. Lease expense incurred totaled $2,531 and $5,090 for the three and six months ended June 30, 2018 , respectively and $2,728 and $5,467 for the three and six months ended June 30, 2017 respectively. The remaining obligations under lease commitments at June 30, 2018 are as follows: Years ended December 31, 2018 $ 6,260 2019 12,817 2020 13,080 2021 12,940 2022 12,282 Thereafter 44,663 Total $ 102,042

Related-Party Transactions

Related-Party Transactions	6 Months Ended
	Jun. 30, 2018
Related Party Transactions [Abstract]
Related-Party Transactions	Related-Party Transactions Related-party transactions not otherwise disclosed in these footnotes to the condensed consolidated financial statements include the following: Credit Facilities Interest expense, including unused fees, for affiliate lines/letters of credit for the three and six months ended June 30, 2018 and 2017 , was as follows: Three Months Ended Six Months Ended June 30, 2018 June 30, 2017 June 30, 2018 June 30, 2017 Line of credit agreement with Santander - New York Branch (Note 5) $ 5,741 $ 15,490 $ 10,108 $ 38,466 Debt facilities with SHUSA (Note 5) 36,561 20,261 72,407 32,894 Accrued interest for affiliate lines/letters of credit at June 30, 2018 and December 31, 2017 , was as follows: June 30, December 31, 2017 Line of credit agreement with Santander - New York Branch (Note 5) $ 1,787 $ 1,435 Debt facilities with SHUSA (Note 5) 18,225 18,670 In August 2015, under an agreement with Santander, the Company agreed to begin incurring a fee of 12.5 basis points (per annum) on certain warehouse lines, as they renew, for which Santander provides a guarantee of the Company's servicing obligations. The Company recognized guarantee fee expense of $1,569 and $3,617 for the three and six months ended June 30, 2018 , respectively, and $1,370 and $2,948 for the three and six months ended June 30, 2017 , respectively. As of June 30, 2018 and December 31, 2017 , the Company had $11,216 and $7,598 of related fees payable to Santander, respectively. Derivatives The Company has derivative financial instruments with Santander and affiliates with outstanding notional amounts of $1,311,693 and $3,734,400 at June 30, 2018 and December 31, 2017 , respectively (Note 7). The Company had a collateral overage on derivative liabilities with Santander and affiliates of $3,060 and $1,622 at June 30, 2018 and December 31, 2017 , respectively. Interest and mark-to-market adjustments on these agreements totaled $231 and $245 for the three months ended June 30, 2018 and 2017 , respectively, and $460 and $216 for the six months ended June 30, 2018 and 2017 , respectively. Lease origination and servicing agreement • In June 2014, the Company executed a bulk sale of Chrysler Capital automobile leases to SBNA. As part of the sale, the Company retained servicing rights on all of the leases sold to SBNA. • In addition, during 2014 and until May 2015, the Company was party to a flow agreement with SBNA whereby SBNA had the first right to review and approve Chrysler Capital consumer vehicle lease applications. The Company received an origination fee on all leases originated under this agreement and continues to service these vehicles leases. Pursuant to the Chrysler Agreement, the Company pays FCA on behalf of SBNA for residual gains and losses on the flowed leases. Servicing fee income recognized on leases serviced for SBNA totaled $567 and $1,656 for the three months ended June 30, 2018 and 2017 , respectively, and $1,348 and $3,049 for the six months ended June 30, 2018 and 2017 , respectively. Other information on the consumer vehicle lease portfolio serviced for SBNA as of June 30, 2018 and December 31, 2017 is as follows: June 30, December 31, Total serviced portfolio $ 7,042 $ 321,629 Origination and servicing fees receivable 113 2,067 Revenue share reimbursement receivable 1,042 1,548 • In June 2014, the Company entered into an indemnification agreement with SBNA whereby the Company 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. At the time of the agreement, the Company established a $48,226 collateral account with SBNA in restricted cash that will be released over time to SBNA, in the case of losses, and the Company, in the case of payments and sale proceeds. As of June 30, 2018 and December 31, 2017 , the balance in the collateral account is zero and $18 , respectively. The Company recognized zero indemnification expense for the three months ended June 30, 2018 and 2017 and $722 and zero for the six months ended June 30, 2018 and 2017 , respectively. • Also, in January 2015, the Company agreed to indemnify SBNA for residual losses, up to a cap, on certain leases originated under the flow agreement between September 24, 2014 and May 9, 2015 for which SBNA and the Company had differing residual value expectations at lease inception. At the time of the agreement, the Company established a collateral account held by SBNA to cover the expected losses, as of June 30, 2018 and December 31, 2017 , the balance in the collateral account was $1,483 and $2,210 , respectively. As of June 30, 2018 and December 31, 2017 , the Company had a recorded liability of $1,481 and $2,206 respectively, related to the residual losses covered under the agreement. Retail Installment Contracts and RV Marine The Company also has agreements with SBNA to service auto retail installment contracts and recreational and marine vehicle portfolios. In addition, during the three months ended September 30, 2017, the Company sold certain receivables previously acquired with deteriorated credit quality to SBNA. The Company will continue to perform the servicing of these assets. Servicing fee income recognized under these agreements totaled $756 and $845 for the three months ended June 30, 2018 and 2017 , respectively, and $1,795 and $1,770 for the six months ended June 30, 2018 and 2017 , respectively. Other information on the serviced auto loan and retail installment contract portfolios for SBNA as of June 30, 2018 and December 31, 2017 is as follows: June 30, December 31, Total serviced portfolio $ 447,228 $ 522,219 Cash collections due to owner 13,478 12,306 Servicing fees receivable 845 943 Dealer Lending • The Company is required to permit SBNA a first right to review and assess Chrysler Capital dealer lending opportunities, and SBNA is required to pay the Company origination fee and annual renewal fee for each loan. The agreement also transferred the servicing of all Chrysler Capital receivables from dealers, including receivables held by SBNA and by the Company, from the Company to SBNA. The Company may provide advance funding for dealer loans originated by SBNA, which is reimbursed to the Company by SBNA. The Company had no outstanding receivable from SBNA as of June 30, 2018 and December 31, 2017 for such advances. Other information related to the above transactions with SBNA as of June 30, 2018 and December 31, 2017 is as follows: Three Months Ended Six Months Ended June 30, 2018 June 30, 2017 June 30, 2018 June 30, 2017 Origination and renewal fee income from SBNA (a) $ 1,232 $ 640 $ 2,072 $ 1,546 Servicing fees expenses charged by SBNA (b) 20 26 39 56 (a) As of June 30, 2018 and December 31, 2017 , the Company had origination and renewal fees receivable from SBNA of $608 and $369 , respectively. (b) As of June 30, 2018 and December 31, 2017 , the Company had $9 and $9 , respectively, of servicing fees payable to SBNA, respectively . • Under the agreement with SBNA, the Company may originate retail consumer loans in connection with sales of vehicles that are collaterally held against floorplan loans by SBNA. Upon origination, the Company remits payment to SBNA, who settles the transaction with the dealer. The Company owed SBNA $6,866 and $4,481 related to such originations as of June 30, 2018 and December 31, 2017 , respectively. • The Company received a $9,000 referral fee in connection with sourcing and servicing arrangement and is amortizing the fee into income over the ten -year term of the agreement through July 1, 2022, the termination date of the agreement. As of June 30, 2018 and December 31, 2017 , the unamortized fee balance was $4,500 and $4,950 , respectively. The Company recognized $225 and $450 of income related to the referral fee for the three and six months ended June 30, 2018 and 2017 , respectively. Origination Support Services Beginning in 2018, the Company agreed to provide SBNA with origination support services in connection with the processing, underwriting and purchase of retail loans, primarily from Chrysler dealers. In addition, the Company agreed to perform the servicing for any loans originated on SBNA’s behalf. During the three and six months ended June 30, 2018 , the Company facilitated the purchase of $29 million and $53 million of retail installment contacts, respectively. The Company recognized referral fee and servicing fee income of $216 and $388 , respectively, for the three and six months ended June 30, 2018 of which $46 is receivable as of June 30, 2018 . In addition, beginning in 2016, the Company agreed to pay SBNA a market rate-based fee expense for payments made at SBNA retail branch locations for accounts originated/serviced by the Company and the costs associated with modifying the Advanced Teller platform to the payments. The Company incurred $154 and $76 for these services during the three months ended June 30, 2018 and 2017 , respectively, and $341 and $116 for the six months ended June 30, 2018 and 2017 , respectively. Securitizations • On March 29, 2017, the Company entered into a Master Securities Purchase Agreement (MSPA) with Santander, whereby the Company has the option to sell a contractually determined amount of eligible prime loans to Santander, through the SPAIN securitization platform, for a term ending in December 2018. The Company provides servicing on all loans originated under this arrangement. For the six months ended June 30, 2017 , the Company sold $1,236,331 of loans under this MSPA arrangement. The MSPA was amended in early 2018 and under this amended agreement, the Company sold $2,631,313 of prime loans at fair value to Santander for the six months ended June 30, 2018 . Other information on the relating to SPAIN securitization platform for the three and six months ended June 30, 2018 and June 30, 2017 is as follows: Three Months Ended Six Months Ended June 30, 2018 June 30, 2017 June 30, 2018 June 30, 2017 Servicing fee income $ 8,622 $ 890 $ 15,822 $ 890 Loss(Gain) on sale, excluding lower of cost or market adjustments (if any) 3,177 3,461 20,080 6,180 Servicing fee receivable as of June 30, 2018 and December 31, 2017 was $3,421 and $1,848 , respectively. The Company had $70,546 and $12,961 of collections due to Santander as of June 30, 2018 and December 31, 2017 respectively. • Santander Investment Securities Inc. (SIS), an affiliated entity, serves as co-manager on certain of the Company’s securitizations. Amounts paid to SIS as co-manager for the three months ended June 30, 2018 and 2017 , totaled $148 and $1,009 , respectively, and totaled $858 and $1,159 for the six months ended June 30, 2018 and 2017 , respectively, and are included in debt issuance costs in the accompanying condensed consolidated financial statements. CEO and other employee compensation • On August 28, 2017, the Board of the Company announced that Scott Powell would succeed Jason Kulas as President and CEO, effective immediately. During the six months ended June 30, 2018, the Company accrued $1,713 as its share of compensation expense based on time allocation between his services to the Company and SHUSA. • In addition, for the six months ended June 30, 2018, the Company owed approximately $ 193 to SHUSA as Chief Compliance Officer's share of compensation expense based on time allocation between his services to the Company and SHUSA. • Further, certain other employees of the Company provide services to SHUSA and certain other employees of SHUSA provide services to the Company. For the six months ended June 30, 2018, the Company owed SHUSA approximately $360 and SHUSA owed the Company approximately $340 for such services. Other related-party transactions • As of June 30, 2018 , Jason Kulas had an equity investment in a property in which the Company leases 373,000 square feet as its corporate headquarters. For the three months ended June 30, 2018 and 2017 , the Company recorded $1,208 and $1,285 , respectively, in lease expenses on this property. For the six months ended June 30, 2018 and 2017 , the Company recorded $2,402 and $2,560 , respectively, in lease expenses on this property. The Company subleases approximately 13,000 square feet of its corporate office space to SBNA. For the three months ended June 30, 2018 and 2017 , the Company recorded $41 and $41 respectively, in sublease revenue on this property. For the six months ended June 30, 2018 and 2017 , the Company recorded $82 and $82 respectively, in sublease revenue on this property. Future minimum lease payments over the remainder of the 9 -year term of the lease, which extends through 2026, total $58,983 . • The Company's wholly-owned subsidiary, Santander Consumer International Puerto Rico, LLC (SCI), opened deposit accounts with Banco Santander Puerto Rico, an affiliated entity. As of June 30, 2018 and December 31, 2017 , SCI had cash of $10,557 and $106,596 , respectively, on deposit with Banco Santander Puerto Rico. • 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 other operating costs in the accompanying consolidated statements of income, totaled zero and $21 for the three months ended June 30, 2018 and 2017 , respectively, and zero and $42 for the six months ended June 30, 2018 and 2017 , respectively. • Beginning in 2017, the Company and SBNA entered into a Credit Card Agreement (Card Agreement) whereby SBNA will provide credit card services for travel and related business expenses and for vendor payments. This service is at zero cost but generate rebates based on purchases made. As of June 30, 2018 , the activities associated with the program were insignificant. • Effective April 1, 2017, the Company contracted Aquanima, a Santander affiliate, to provide procurement services. Expenses incurred and paid for totaled $379 and $212 for the three months ended June 30, 2018 and 2017 , respectively and $758 and $212 for the six months ended June 30, 2018 and 2017 , respectively. • The Company partners with SHUSA to place Cyber Liability Insurance in which participating national entities share $150 million aggregate limits. The Company repays SHUSA for the Company’s equitably allocated portion of insurance premiums and fees. Expenses incurred totaled $93 and $78 for the three months ended June 30, 2018 and 2017 , respectively and $185 and $156 for the six months ended June 30, 2018 and 2017 , respectively. In addition the Company partners with SHUSA for various other insurance products. Expenses incurred totaled $163 and $141 for the three months ended June 30, 2018 and 2017 , respectively, and $325 and $281 for the six months ended June 30, 2018 and 2017 , respectively.

Computation of Basic and Dilute

Computation of Basic and Diluted Earnings per Common Share	6 Months Ended
	Jun. 30, 2018
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 (EPS) 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. The calculation of diluted EPS excludes 221,572 and 952,111 employee stock options for the three and six months ended June 30, 2018 and 2017 , respectively, as the effect of exercise or settlement of those securities would be anti-dilutive. RSUs of zero for the three and six months ended June 30, 2018 and 479 and 555 for the three and six months ended June 30, 2017, respectively, were excluded from the calculation of diluted EPS as the effect of exercise or settlement of those securities would be anti-dilutive. The following table represents EPS numbers for the three and six months ended June 30, 2018 and 2017 : Three Months Ended Six Months Ended 2018 2017 2018 2017 Earnings per common share Net income $ 334,641 $ 264,675 $ 576,940 $ 408,102 Weighted average number of common shares outstanding before restricted participating shares (in thousands) 361,268 359,311 360,987 359,134 Weighted average number of participating restricted common shares outstanding (in thousands) — 150 — 150 Weighted average number of common shares outstanding (in thousands) 361,268 359,461 360,987 359,284 Earnings per common share $ 0.93 $ 0.74 $ 1.60 $ 1.14 Earnings per common share - assuming dilution Net income $ 334,641 $ 264,675 $ 576,940 $ 408,102 Weighted average number of common shares outstanding (in thousands) 361,268 359,461 360,987 359,284 Effect of employee stock-based awards (in thousands) 790 368 842 644 Weighted average number of common shares outstanding - assuming dilution (in thousands) 362,058 359,829 361,829 359,928 Earnings per common share - assuming dilution $ 0.92 $ 0.74 $ 1.59 $ 1.13

Fair Value of Financial Instrum

Fair Value of Financial Instruments	6 Months Ended
	Jun. 30, 2018
Fair Value Disclosures [Abstract]
Fair Value of Financial Instruments	Fair Value of Financial Instruments Fair value measurement requires that valuation techniques maximize the use of observable inputs and minimize the use of unobservable inputs and also establishes a fair value hierarchy that categorizes the inputs to valuation techniques used to measure fair value into three levels as follows: Level 1 inputs are quoted prices in active markets for identical assets or liabilities that can be accessed as of the measurement date. Active markets are those in which transactions for the asset or liability occur in sufficient frequency and volume to provide pricing information on an ongoing basis. Level 2 inputs are those other than quoted prices included within Level 1 that are observable for the asset or liability, either directly or indirectly. These include quoted prices for similar assets or liabilities in active markets and quoted prices for identical or similar assets or liabilities in markets that are not active. Level 3 inputs are those that are unobservable for the asset or liability and are used to measure fair value to the extent relevant observable inputs are not available. Financial Instruments Disclosed, But Not Carried, At Fair Value The following tables present the carrying value and estimated fair value of the Company’s financial assets and liabilities disclosed, but not carried, at fair value at June 30, 2018 and December 31, 2017 , and the level within the fair value hierarchy: June 30, 2018 Carrying Estimated Level 1 Level 2 Level 3 Assets: Cash and cash equivalents (a) $ 319,688 $ 319,688 $ 319,688 $ — $ — Finance receivables held for investment, net (b) 23,917,404 25,331,074 — — 25,331,074 Restricted cash (a) 2,125,410 2,125,410 2,125,410 — — Total $ 26,362,502 $ 27,776,172 $ 2,445,098 $ — $ 25,331,074 Liabilities: Notes payable — credit facilities (c) $ 4,502,823 $ 4,502,823 $ — $ — $ 4,502,823 Notes payable — secured structured financings (d) 24,300,820 24,352,684 — 16,462,852 7,889,832 Notes payable — related party (e) 3,125,963 3,068,515 — — 3,068,515 Total $ 31,929,606 $ 31,924,022 $ — $ 16,462,852 $ 15,461,170 December 31, 2017 Carrying Estimated Level 1 Level 2 Level 3 Assets: Cash and cash equivalents (a) $ 527,805 $ 527,805 $ 527,805 $ — $ — Finance receivables held for investment, net (b) 22,284,068 24,340,739 — — 24,340,739 Restricted cash (a) 2,553,902 2,553,902 2,553,902 — — Total $ 25,365,775 $ 27,422,446 $ 3,081,707 $ — $ 24,340,739 Liabilities: Notes payable — credit facilities (c) $ 4,848,316 $ 4,848,316 $ — $ — $ 4,848,316 Notes payable — secured structured financings (d) 22,557,895 22,688,381 — 12,275,408 10,412,973 Notes payable — related party (e) 3,754,223 3,754,223 — — 3,754,223 Total $ 31,160,434 $ 31,290,920 $ — $ 12,275,408 $ 19,015,512 (a) Cash and cash equivalents and restricted cash — The carrying amount of cash and cash equivalents, including restricted cash, is at an approximated fair value as the instruments mature within 90 days or less and bear interest at market rates. (b) Finance receivables held for investment, net — Finance receivables held for investment, net are carried at amortized cost, net of an allowance. These receivables exclude retail installment contracts that are measured at fair value on a recurring and nonrecurring basis. The estimated fair value for the underlying financial instruments are determined as follows: • Retail installment contracts held for investment and purchased receivables — The estimated fair value is calculated based on a DCF in which the Company uses significant unobservable inputs on key assumptions, including historical default rates and adjustments to reflect prepayment rates, expected recovery rates, discount rates reflective of the cost of funding, and credit loss expectations. • Capital lease receivables — Capital lease receivables are carried at gross investments, net of unearned income and allowance for lease losses. Management believes that the terms of these credit agreements approximate market terms for similar credit agreements. • Receivables from dealers and personal loans held for investment — Receivables from dealers and personal loans held for investment are carried at amortized cost, net of credit loss allowance. Management believes that the terms of these credit agreements approximate market terms for similar credit agreements. (c) Notes payable — credit facilities — The carrying amount of notes payable related to revolving credit facilities is estimated to approximate fair value. Management believes that the terms of these credit agreements approximate market terms for similar credit agreements as the facilities are subject to short-term floating interest rates that approximate rates available to the Company. (d) Notes payable — secured structured financings — The estimated fair value of notes payable related to secured structured financings is calculated based on market observable prices and spreads for the Company's publicly traded debt and market observed prices of similar notes issued by the Company, or recent market transactions involving similar debt with similar credit risks, which are considered level 2 inputs. The estimated fair value of notes payable related to privately issued amortizing notes is calculated based on a combination of credit enhancement review, discounted cash flow analysis and review of market observable spreads for similar liabilities. In conducting this analysis, the Company uses significant unobservable inputs on key assumptions, including historical default rates, prepayment rates, discount rates reflective of the cost of funding, and credit loss expectations, which are considered level 3 inputs. (e) Notes payable — related party — The carrying amount of floating rate notes payable to a related party is estimated to approximate fair value as the facilities are subject to short-term floating interest rates that approximate rates available to the Company. The fair value premium/discount of the fixed rate promissory notes are derived from changes in the Company's unsecured cost of funds since the time of issuance and weighted average life of these notes. Financial Instruments Measured At Fair Value On A Recurring Basis The following tables present the Company’s assets and liabilities that are measured at fair value on a recurring basis at June 30, 2018 and December 31, 2017 , and the level within the fair value hierarchy: Fair Value Measurements at June 30, 2018 Total Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Other assets — trading interest rate caps (a) $ 184,822 $ — $ 184,822 $ — Due from affiliates — trading interest rate caps (a) 14,111 — 14,111 — Other assets — cash flow hedging interest rate swaps (a) 74,110 — 74,110 — Other assets — trading interest rate swaps (a) 19,596 — 19,596 — Other liabilities — trading options for interest rate caps (a) 185,020 — 185,020 — Due to affiliates — trading options for interest rate caps (a) 14,111 — 14,111 — Retail installment contracts acquired individually (b) 17,182 — — 17,182 Fair Value Measurements at December 31, 2017 Total Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Other assets — trading interest rate caps (a) $ 129,718 $ — $ 129,718 $ — Due from affiliates — trading interest rate caps (a) 6,112 — 6,112 — Other assets — cash flow hedging interest rate swaps (a) 39,036 — 39,036 — Due from affiliates — cash flow hedging interest rate swaps (a) 6,950 — 6,950 — Other assets — trading interest rate swaps (a) 7,925 — 7,925 — Due from affiliates — trading interest rate swaps (a) 1,671 — 1,671 — Other assets — trading options for interest rate caps (a) 20,075 — 20,075 — Due from affiliates — trading options for interest rate caps (a) 12,090 — 12,090 — Other liabilities — trading options for interest rate caps (a) 129,712 — 129,712 — Due to affiliates — trading options for interest rate caps (a) 6,112 — 6,112 — Other liabilities — trading interest rate caps (a) 20,019 — 20,019 — Due to affiliates — trading interest rate caps (a) 12,090 — 12,090 — Retail installment contracts acquired individually (b) 22,124 — — 22,124 (a) The valuation is determined using widely accepted valuation techniques including a DCF 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) For certain retail installment contracts reported in finance receivables held for investment, net, the Company has elected the fair value option. The fair values of the retail installment contracts are estimated using a DCF model. When estimating the fair value using this model, the Company uses significant unobservable inputs on key assumptions, which includes historical default rates and adjustments to reflect prepayment rates based on available data from a comparable market securitization of similar assets, discount rates reflective of the cost of funding of debt issuance and recent historical equity yields, and recovery rates based on the average severity utilizing reported severity rates and loss severity utilizing available market data from a comparable securitized pool. Accordingly, retail installment contracts held for investment are classified as Level 3. Changes in the fair value are recorded in investment gains (losses), net in the condensed consolidated statement of income. The following table presents the changes in retail installment contracts held for investment balances classified as Level 3 balances for the three and six months ended June 30, 2018 and 2017 : Three Months Ended June 30, Six Months Ended June 30, 2018 2017 2018 2017 Balance — beginning of period $ 18,850 $ 30,652 $ 22,124 $ 24,495 Additions / issuances 1,927 6,396 3,276 19,727 Net collection activities (3,936 ) (6,998 ) (9,530 ) (17,123 ) Gains recognized in earnings 341 439 1,312 3,390 Balance — end of period $ 17,182 $ 30,489 $ 17,182 $ 30,489 All total return settlement payments were made as of September 30, 2017, and the derivative instrument has been settled. The following table presents the changes in the total return settlement balance, which was classified as Level 3, for the three and six months ended June 30, 2017 : Three Months Ended Six Months Ended Balance — beginning of period $ 31,123 $ 30,618 (Gains)/losses recognized in earnings — 505 Balance — end of period $ 31,123 $ 31,123 The Company did not have any transfers between Levels 1 and 2 during the three and six months ended June 30, 2018 and 2017 . There were no amounts transferred into or out of Level 3 during the three and six months ended June 30, 2018 and 2017 . Financial Instruments Measured At Fair Value On A 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, 2018 and December 31, 2017 , and are categorized using the fair value hierarchy: Fair Value Measurements at June 30, 2018 Total Quoted Prices Significant Significant Lower of cost or fair value expense for the six months ended June 30, 2018 Other assets — vehicles (a) $ 254,086 $ — $ 254,086 $ — $ — Personal loans held for sale (b) 956,455 — — 956,455 134,688 Retail installment contracts held for sale (c) 290,277 — — 290,277 15,026 Auto loans impaired due to bankruptcy (d) 162,184 — 162,184 88,812 Fair Value Measurements at December 31, 2017 Total Quoted Prices Significant Significant Lower of cost or fair value expense for the year ended December 31, 2017 Other assets — vehicles (a) $ 293,546 $ — $ 293,546 $ — $ — Personal loans held for sale (b) 1,062,089 — — 1,062,089 374,374 Retail installment contracts held for sale (c) 1,148,332 — — 1,148,332 11,686 Auto loans impaired due to bankruptcy (d) 121,578 — 121,578 — 75,194 ( a) The Company estimates the fair value of its vehicles, which are obtained either through repossession or lease termination, using historical auction rates and current market levels of used car prices. (b) The estimated fair value for personal loans held for sale is calculated based on the lower of market participant view and a DCF analysis in which the Company uses significant unobservable inputs on key assumptions, including historical default rates and adjustments to reflect prepayment rates, discount rates reflective of the cost of funding, and credit loss expectations. The lower of cost or fair value adjustment for personal loans held for sale includes customer default activity and adjustments related to the net change in the portfolio balance during the reporting period. (c) Represents retail installment contract held for sale reserved for future SPAIN transactions. At June 30, 2018 , as the SPAIN ABS platform matures with several market executions over the last few quarters, the fair value of these installment contracts are estimated based on contractual pricing methodology used for previous SPAIN transactions. This pricing methodology includes consideration of significant unobservable inputs including investor return expectations (i.e., Yield), expected lifetime cumulative net loss and weighted average life of the retail installment contracts. At December 31, 2017 , the estimated fair value was calculated based on a DCF analysis in which the Company used significant unobservable inputs on key assumptions, including expected default rates, prepayment rates, recovery rates, and discount rates reflective of the cost of funds and appropriate rate of returns. The change in methodology did not have a material impact on the fair value mark of the retail installments contacts held for sale. (d) For loans that are considered collateral-dependent, such as certain bankruptcy loans, impairment is measured based on the fair value of the collateral, less its estimated cost to sell. For the underlying collateral, the estimated fair value is obtained using historical auction rates and current market levels of used car prices. Quantitative Information about Level 3 Fair Value Measurements The following table presents quantitative information about the significant unobservable inputs for assets and liabilities measured at fair value on a recurring and nonrecurring basis at June 30, 2018 and December 31, 2017 : Financial Instruments Fair Value at June 30, 2018 Valuation Technique Unobservable Inputs Range Financial Assets: Retail installment contracts held for investment $ 17,182 Discounted Cash Flow Discount Rate 8%-10% Default Rate 15%-20% Prepayment Rate 6%-8% Loss Severity Rate 50%-60% Personal loans held for sale $ 956,455 Lower of Market or Income Approach Market Approach Market Participant View 70%-80% Income Approach Discount Rate 15%-25% Default Rate 30%-40% Net Principal Payment Rate 50%-70% Loss Severity Rate 90%-95% Retail installment contracts held for sale $ 290,277 Income Approach Expected Yield 1%-2% Expected Lifetime Cumulative Net Loss 4%-6% Weighted Average Life 2 - 3 years Financial Instruments Fair Value at December 31, 2017 Valuation Technique Unobservable Inputs Range Financial Assets: Retail installment contracts held for investment $ 22,124 Discounted Cash Flow Discount Rate 8%-10% Default Rate 15%-20% Prepayment Rate 6%-8% Loss Severity Rate 50%-60% Personal loans held for sale $ 1,062,089 Lower of Market or Income Approach Market Approach Market Participant View 70%-80% Income Approach Discount Rate 15%-20% Default Rate 30%-40% Net Principal Payment Rate 50%-70% Loss Severity Rate 90%-95% Retail installment contracts held for sale $ 1,148,332 Discounted Cash Flow Discount Rate 3%-6% Default Rate 3%-4% Prepayment Rate 15%-20% Loss Severity Rate 50%-60%

Employee Benefit Plans

Employee Benefit Plans	6 Months Ended
	Jun. 30, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Employee Benefit Plans	Employee Benefit Plans The Company has granted stock options to certain executives, other employees, and independent directors under the Company's 2011 Management Equity Plan (the MEP), which enabled the Company to make stock awards up to a total of approximately 29 million common shares (net of shares canceled and forfeited). The MEP expired in January 2015 and the Company will not grant any further awards under the MEP. The Company has granted stock options, restricted stock awards and restricted stock units (RSUs) under the Omnibus Incentive Plan (the Plan), which was established in 2013 and enables the Company to grant awards of cash and of non-qualified and incentive stock options, stock appreciation rights, restricted stock awards, RSUs, and other awards that may be settled in or based upon the value of the Company's common stock up to a total of 5,192,641 common shares. The Plan was amended and restated as of June 16, 2016. Stock options granted under the MEP and the Plan 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 ten years after grant date and include both time vesting options and performance vesting options. The fair value of the stock options is amortized into expense over the vesting period as time and performance vesting conditions are met. Compensation expense related to the 583,890 shares of restricted stock that the Company has issued to certain executives is recognized over a five -year vesting period, with zero and $181 recorded for the three months ended June 30, 2018 and 2017 , and zero and $359 for the six months ended June 30, 2018 and 2017 , respectively. The Company recognized $5,794 and $4,084 related to stock options and restricted stock units within compensation expense for the six months ended June 30, 2018 and 2017 , respectively. In addition, the Company recognizes forfeitures of awards as they occur. A summary of the Company’s stock options and related activity as of and for the six months ended June 30, 2018 is as follows: Shares Weighted Average Exercise Price Weighted Average Remaining Contractual Term (Years) Aggregate Intrinsic Value Options outstanding at January 1, 2018 1,695,008 $ 12.39 4.7 $ 12,058 Granted — — — — Exercised (518,893 ) 9.46 — 4,431 Expired (67,579 ) 23.63 — — Forfeited (65,398 ) 23.57 — — Options outstanding at June 30, 2018 1,043,138 12.41 3.7 7,689 Options exercisable at June 30, 2018 911,072 $ 11.25 3.4 $ 7,536 In connection with compensation restrictions imposed on certain executive officers and other employees by the European Central Bank under the Capital Requirements Directive IV prudential rules, which require a portion of such officers' and employees' variable compensation to be paid in the form of equity, the Company periodically grants RSUs. Under the Plan, a portion of these RSUs vest immediately upon grant, and a portion vest annually over the following three or five years and subject to the achievement of certain performance conditions as applicable. After the shares subject to the RSUs vest and are settled, they are subject to transfer and sale restrictions for one year . In addition, the Company grants RSUs to certain officers and employees as part of variable compensation and these RSUs vest over three years . The Company also has granted certain directors RSUs that vest either upon the earlier of the first anniversary of grant date or the first stockholder meeting following the grant date. RSUs are valued based upon the fair market value on the date of the grant. A summary of the Company’s Restricted Stock Units and performance stock units and related activity as of and for the six months ended June 30, 2018 is as follows: Shares Weighted Average Grant Date Fair Value Weighted Average Remaining Contractual Term (Years) Aggregate Intrinsic Value Outstanding as of January 1, 2018 $ 650,252 $ 12.68 1.0 $ 12,108 Granted 591,215 16.35 — — Vested (491,374 ) 14.20 — 8,038 Forfeited/canceled (22,719 ) 12.74 — — Unvested as of June 30, 2018 727,374 14.58 1.5 13,886

Shareholders' Equity

Shareholders' Equity	6 Months Ended
	Jun. 30, 2018
Equity [Abstract]
Shareholders' Equity	Shareholders' Equity Treasury Stock The Company had 252,002 shares of treasury stock outstanding, with a cost of $5,370 as of June 30, 2018 , and as of December 31, 2017 . Prior to the IPO, the Company repurchased 3,154 shares as a result of an employee leaving the Company. Additionally, 248,848 shares were withheld to cover income taxes related to stock issued in connection with employee incentive compensation plans. The value of the treasury stock is immaterial and included within additional paid-in-capital. Accumulated Other Comprehensive Income (Loss) A summary of changes in accumulated other comprehensive income (loss), net of tax, for the three and six months ended June 30, 2018 and 2017 is as follows: Three Months Ended Six Months Ended June 30, 2018 June 30, 2017 June 30, 2018 June 30, 2017 Beginning balance, unrealized gains (losses) on cash flow hedges $ 63,211 $ 35,504 $ 44,262 $ 28,259 Other comprehensive income (loss) before reclassifications (gross) (a) 7,015 (14,022 ) 29,934 (4,123 ) Amounts (gross) reclassified out of accumulated other comprehensive income (loss) (7,777 ) 6,378 (11,747 ) 3,724 Ending balance, unrealized gains (losses) on cash flow hedges $ 62,449 $ 27,860 $ 62,449 $ 27,860 (a) Includes impact of accumulated other comprehensive income reclassified to Retained earnings, primarily comprised of $6,149 as a result of the adoption of ASU 2018-02. Refer to Note 1 for further discussion. Amounts (gross) reclassified out of accumulated other comprehensive income (loss) during the three and six months ended June 30, 2018 and 2017 consist of the following: Three Months Ended June 30, 2018 Three Months Ended June 30, 2017 Reclassification Amount reclassified Income statement line item Amount reclassified Income statement line item Cash flow hedges $ (9,095 ) Interest expense $ 8,859 Interest expense Tax expense (benefit) 1,318 (2,481 ) Net of tax $ (7,777 ) $ 6,378 Six Months Ended June 30, 2018 Six Months Ended June 30, 2017 Reclassification Amount reclassified Income statement line item Amount reclassified Income statement line item Cash flow hedges $ (13,672 ) Interest expense $ 4,619 Interest expense Tax expense (benefit) 1,925 (895 ) Net of tax $ (11,747 ) $ 3,724 Dividends The Company paid a cash dividend of $0.05 per share in May 2018 and has declared a cash dividend of $0.20 per share, to be paid on August 8, 2018, to shareholders of record as of the close of business on August 6, 2018.

Investment Losses, Net

Investment Losses, Net	6 Months Ended
	Jun. 30, 2018
Investments, Debt and Equity Securities [Abstract]
Investment Losses, Net	Investment Losses, Net When the Company sells retail installment contracts acquired individually, personal loans or leases to unrelated third parties or to VIEs and determines that such sale meets the applicable criteria for sale accounting, the Company recognizes a gain or loss for the difference between the cash proceeds and carrying value of the assets sold. The gain or loss is recorded in investment gains (losses), net. Lower of cost or market adjustments on the recorded investment of finance receivables held for sale are also recorded in investment gains (losses), net. Investment gains (losses), net was comprised of the following for the three and six months ended June 30, 2018 and 2017 : Three Months Ended Six Months Ended June 30, 2018 June 30, 2017 June 30, 2018 June 30, 2017 Gain (loss) on sale of loans and leases $ (2,096 ) $ (2,179 ) $ (18,792 ) $ (13,061 ) Lower of cost or market adjustments (79,215 ) (95,683 ) (149,714 ) (161,804 ) Other gains, (losses and impairments), net (1,323 ) (1,660 ) (648 ) (1,056 ) $ (82,634 ) $ (99,522 ) $ (169,154 ) $ (175,921 ) The lower of cost or market adjustments for the three and six months ended June 30, 2018 and 2017 included $89,513 , $195,287 , $107,717 , and $224,358 in customer default activity, respectively, and net favorable adjustments of $10,298 , $45,573 , $12,034 , and $62,554 respectively, primarily related to net changes in the unpaid principal balance on the personal lending portfolio, most of which has been classified as held for sale.

Description of Business, Basi25

Description of Business, Basis of Presentation, and Significant Accounting Policies and Practices (Policies)	6 Months Ended
	Jun. 30, 2018
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 Trusts, which are considered VIEs. The Company also consolidates other VIEs for which it was deemed to be the primary beneficiary. All intercompany balances and transactions have been eliminated in consolidation. The accompanying condensed consolidated financial statements as of June 30, 2018 and December 31, 2017 , and for the three and six months ended June 30, 2018 and 2017 , have been prepared in accordance with 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 U.S. GAAP for complete financial statements. In the opinion of management, these financial statements contain all adjustments, consisting of normal recurring adjustments, necessary for the fair statement of 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 2017 Annual Report on Form 10-K. The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that 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 credit loss allowance, discount accretion, impairment, fair value, 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 recreational vehicles, and marine vehicles. It also includes the Company’s personal loan and point-of-sale financing operations.
Recently Adopted Accounting Standards and Recently Issued Accounting Pronouncements	Recently Adopted Accounting Standards Since January 1, 2018, the Company adopted the following Financial Accounting Standards Board (FASB) Accounting Standards Updates (ASUs): • ASU 2014-09, Revenue from Contracts with Customers (Topic 606) as amended . This ASU, requires an entity to recognize revenue for the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. It includes a five-step process to assist an entity in achieving the main principles of revenue recognition under ASC 606. Because the ASU does not apply to revenue associated with leases and financial instruments (including loans, securities, and derivatives), it did not have a material impact on the elements of the Company's Consolidated Statements of Operations most closely associated with leases and financial instruments (such as interest income, interest expense and investment gains and losses). All other revenue streams in the scope of the new standard were not material. The Company adopted this standard as of January 1, 2018 using a modified retrospective approach. The adoption of this standard did not require any adjustments to the opening balance of retained earnings as of January 1, 2018. • ASU 2016-18, Statement of Cash Flows (Topic 230) . Restricted Cash (A consensus of the FASB Emerging Issues Task Force) , which requires that the statement of cash flows include restricted cash in the beginning and end-of-period total amounts shown on the statement of cash flows and that the statement of cash flows explain changes in restricted cash during the period. The Company adopted this standard as of January 1, 2018 using retrospective approach. The impact of this adoption was disclosure only for periods presented on the Company's Statements of Cash Flows. • ASU 2017-12, Derivatives and Hedging: Targeted Improvements to Accounting for Hedging Activities . The new guidance amends the hedge accounting model to enable entities to more accurately reflect their risk management activities in the financial statements. The amendments expand an entity’s ability to hedge nonfinancial and financial risk components and reduce complexity in hedges of interest rate risk. The guidance eliminates the requirement to separately measure and report hedge ineffectiveness and generally requires the entire change in the fair value of a hedging instrument to be presented in the same income statement line in which the earnings effect of the hedged item is reported. The new guidance is effective for public business entities for fiscal years beginning after December 15, 2018, with early adoption, including adoption in an interim period, permitted. The Company elected to early adopt this standard as of January 1, 2018 using modified retrospective approach. The adoption of this standard did not require any adjustments to the opening balance of retained earnings for cumulative-effect adjustment related to eliminating the separate measurement of ineffectiveness. • ASU 2018-02, Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income. The amendments in this ASU allow a reclassification from accumulated other comprehensive income to retained earnings for stranded tax effects resulting from the Tax Cuts and Jobs Act. The new guidance is effective for public business entities for fiscal years beginning after December 15, 2018, with early adoption, including adoption in an interim period, permitted. The Company elected to early adopt this standard as of January 1, 2018 and reclassified $6,149 stranded income tax effects from accumulated other comprehensive income to retained earnings. The adoption of the following ASUs did not have an impact on the Company's business, financial position or results of operations. • ASU 2016-01, Financial Instruments - Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities, as amended • ASU 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments • ASU 2016-16, Income Taxes (Topic 740): Intra-Entity Transfers of Assets Other Than Inventory • ASU 2017-01, Business Combinations (Topic 805): Clarifying the Definition of a Business • ASU 2017-05, Other Income - Gains and Losses from the Derecognition of Nonfinancial Assets (Subtopic 610-20): Clarifying the Scope of Asset Derecognition Guidance and Accounting for Partial Sales of Nonfinancial Assets • ASU 2017-07, Compensation - Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost • ASU 2017-09 , Compensation-Stock Compensation (Topic 718): Scope of Modification Accounting • ASU 2018-05, Income Taxes (Topic 740): Amendments to SEC Paragraphs Pursuant to SEC Staff Accounting Bulletin No. 118 • ASU 2018-06 , Codification Improvements to Topic 942, Financial Services—Depository and Lending Recently Issued Accounting Pronouncements In February 2016, the FASB issued ASU 2016-02, Leases , which will, among other impacts, change the criteria under which leases are identified and accounted for as on- or off-balance sheet. The guidance will be effective for the fiscal year beginning after December 15, 2018, including interim periods within that year. Once effective, the new guidance must be applied for all periods presented. The Company is in the process of reviewing its existing property and equipment lease contracts as well as service contracts that may include embedded leases. Upon adoption, the Company will gross up its balance sheet by the present value of future minimum lease payments for these operating leases. The Company does not intend to early adopt this ASU. In June 2016, the FASB issued ASU 2016-13, Financial Instruments-Credit Losses , which changes the criteria under which credit losses are measured. The amendment introduces a new credit reserving model known as the Current Expected Credit Loss (CECL) model, which replaces the incurred loss impairment methodology in current U.S. GAAP with a methodology that reflects expected credit losses and requires consideration of a broader range of reasonable and supportable information to establish credit loss estimates. The guidance will be effective for the fiscal year beginning after December 15, 2019, including interim periods within that year. The Company does not intend to adopt the new standard early and is currently evaluating the impact the new guidance will have on its financial position, results of operations and cash flows; however, it is expected that the new CECL model will alter the assumptions used in calculating the Company's credit losses, given the change to estimated losses for the estimated life of the financial asset, and will likely result in material changes to the Company’s credit and capital reserves. In addition to those described in detail above, the Company is also in the process of evaluating the following ASUs and does not expect them to have a material impact on the Company's business, financial position, results of operations or disclosures: • ASU 2017-06, Plan Accounting: Defined Benefit Pension Plans (Topic 960), Defined Contribution Pension Plans (Topic 962), Health and Welfare Benefit Plans (Topic 965): Employee Benefit Plan Master Trust Reporting (a consensus of the Emerging Issues Task Force) • ASU 2017-08, Receivables - Nonrefundable Fees and Other Costs (Subtopic 310-20): Premium Amortization on Purchased Callable Debt Securities • ASU 2017-11, Earnings Per Share (Topic 260); Distinguishing Liabilities from Equity (Topic 480); Derivatives and Hedging (Topic 815): (Part I) Accounting for Certain Financial Instruments with Down Round Features, (Part II) Replacement of the Indefinite Deferral for Mandatorily Redeemable Financial Instruments of Certain Nonpublic Entities and Certain Mandatorily Redeemable Noncontrolling Interests with a Scope Exception • ASU 2018-07, Compensation - Stock Compensation (Topic 718): Improvements to Nonemployee Share-Based Payment Accounting

Finance Receivables (Tables)

Finance Receivables (Tables)	6 Months Ended
	Jun. 30, 2018
Receivables [Abstract]
Summary of Financing Receivables Held for Investment	Finance receivables held for investment, net is comprised of the following at June 30, 2018 and December 31, 2017 : June 30, December 31, 2017 Retail installment contracts acquired individually (a) $ 24,039,237 $ 22,362,509 Purchased receivables 22,678 27,839 Receivables from dealers 15,042 15,623 Personal loans 3,038 4,459 Capital lease receivables (Note 3) 16,775 17,339 Finance receivables held for investment, net $ 24,096,770 $ 22,427,769 (a) The Company has elected the fair value option for certain retail installment contracts reported in finance receivables held for investment, net. As at June 30, 2018 and December 31, 2017 , $17,182 and $22,124 of loans were recorded at fair value (Note 13). The Company's held for investment portfolio of retail installment contracts acquired individually, receivables from dealers, and personal loans is comprised of the following at June 30, 2018 and December 31, 2017 : June 30, 2018 Retail Installment Contracts Receivables from Personal Loans Non-TDR TDR Unpaid principal balance $ 21,414,617 $ 5,958,564 $ 15,200 $ 4,016 Credit loss allowance - specific — (1,496,580 ) — — Credit loss allowance - collective (1,641,214 ) — (158 ) (1,116 ) Discount (212,484 ) (58,265 ) — — Capitalized origination costs and fees 69,151 5,448 — 138 Net carrying balance $ 19,630,070 $ 4,409,167 $ 15,042 $ 3,038 December 31, 2017 Retail Installment Contracts Receivables from Personal Loans Non-TDR TDR Unpaid principal balance $ 19,681,394 $ 6,261,894 $ 15,787 $ 6,887 Credit loss allowance - specific — (1,731,320 ) — — Credit loss allowance - collective (1,529,815 ) — (164 ) (2,565 ) Discount (309,191 ) (74,832 ) — (1 ) Capitalized origination costs and fees 58,638 5,741 — 138 Net carrying balance $ 17,901,026 $ 4,461,483 $ 15,623 $ 4,459 Purchased receivables portfolios, which were acquired with deteriorated credit quality, is comprised of the following at June 30, 2018 and December 31, 2017 : June 30, December 31, 2017 Outstanding balance $ 35,750 $ 43,474 Outstanding recorded investment, net of impairment 22,845 28,069
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 2018 2017 2018 2017 Balance — beginning of period $ 18,446 $ 97,946 $ 19,464 $ 107,041 Accretion of accretable yield (2,245 ) (10,303 ) (5,085 ) (21,447 ) Reclassifications from (to) nonaccretable difference (a) 2,167 351 3,989 2,400 Balance — end of period $ 18,368 $ 87,994 $ 18,368 $ 87,994 (a) Reclassifications from (to) nonaccretable difference represents the increases (decreases) in accretable yield resulting from higher (lower) estimated undiscounted cash flows.
Schedule of Carrying Values of Finance Receivables Held for Sale	The carrying value of the Company's finance receivables held for sale, net is comprised of the following at June 30, 2018 and December 31, 2017 : June 30, December 31, 2017 Retail installment contracts acquired individually $ 290,277 $ 1,148,332 Personal loans 956,455 1,062,089 Finance receivables held for sale, net $ 1,246,732 $ 2,210,421
Schedule of Sales of Retail Installment Contracts and Charged-off Assets	Sales of retail installment contracts and proceeds from sales of charged-off assets for the three and six months ended June 30, 2018 and 2017 were as follows: For the Three Months Ended For the Six Months Ended 2018 2017 2018 2017 Sales of retail installment contracts to third parties $ — $ 30,000 $ — $ 260,568 Sale of retail installment contracts to affiliates 1,156,060 536,309 2,631,313 1,236,331 Proceeds from sales of charged-off assets to third parties 16,638 27,449 34,875 48,792
Schedule of Servicing of Retail Installment Contracts	Total contracts sold to unrelated third parties and/or serviced as of June 30, 2018 and December 31, 2017 were as follows: June 30, December 31, 2017 Serviced balance of retail installment contracts and leases $ 5,089,007 $ 5,771,085

Leases (Tables)

Leases (Tables)	6 Months Ended
	Jun. 30, 2018
Leases [Abstract]
Summary of Leased Vehicles	Leased vehicles, net, which is comprised of leases originated under the Chrysler Agreement, consisted of the following as of June 30, 2018 and December 31, 2017 : June 30, December 31, Leased vehicles $ 15,874,839 $ 14,285,769 Less: accumulated depreciation (3,039,121 ) (3,110,167 ) Depreciated net capitalized cost 12,835,718 11,175,602 Manufacturer subvention payments, net of accretion (1,152,082 ) (1,042,477 ) Origination fees and other costs 45,846 27,202 Net book value $ 11,729,482 $ 10,160,327
Summary of Minimum Rental Payments under Operating Leases	The following summarizes the future minimum rental payments due to the Company as lessor under operating leases as of June 30, 2018 : Remainder of 2018 $ 1,054,424 2019 1,658,331 2020 978,411 2021 164,984 2022 3,664 Thereafter — Total $ 3,859,814
Schedule of Capital Lease Receivables	Capital lease receivables, net consisted of the following as of June 30, 2018 and December 31, 2017 : June 30, December 31, Gross investment in capital leases $ 24,273 $ 27,234 Origination fees and other 157 124 Less: unearned income (4,073 ) (4,377 ) Net investment in capital leases before allowance 20,357 22,981 Less: allowance for lease losses (3,582 ) (5,642 ) Net investment in capital leases $ 16,775 $ 17,339
Summary of Future Minimum Lease Payments for Capital Leases	The following summarizes the future minimum lease payments due to the Company as lessor under capital leases as of June 30, 2018 : Remainder of 2018 $ 4,705 2019 6,975 2020 5,392 2021 3,773 2022 2,941 Thereafter 487 Total $ 24,273

Credit Loss Allowance and Cre28

Credit Loss Allowance and Credit Quality (Tables)	6 Months Ended
	Jun. 30, 2018
Loans and Leases Receivable Disclosure [Abstract]
Summary of Activity in Loan Loss Allowance	The activity in the lease loss allowance for capital leases for the three and six months ended June 30, 2018 and 2017 was as follows: Three Months Ended Six Months Ended 2018 2017 2018 2017 Balance — beginning of period $ 5,757 $ 6,605 $ 5,642 $ 9,988 Provision for lease losses (1,769 ) 1,040 (1,348 ) (1,029 ) Charge-offs (1,760 ) (3,081 ) (3,141 ) (6,760 ) Recoveries 1,354 1,803 2,429 4,168 Balance — end of period $ 3,582 $ 6,367 $ 3,582 $ 6,367 The activity in the credit loss allowance for individually acquired retail installment contracts and Dealer Loans for the three and six months ended June 30, 2018 and 2017 was as follows: Three Months Ended June 30, 2018 Three Months Ended June 30, 2017 Retail Installment Contracts Acquired Individually Receivables from Dealers Personal Loans Retail Installment Contracts Acquired Individually Receivables from Dealers Personal Loans Non-TDR TDR Non-TDR TDR Balance — beginning of period $ 1,586,557 $ 1,595,465 $ 161 $ 1,714 $ 1,836,730 $ 1,604,489 $ 734 $ 4,517 Provision for credit losses 242,286 112,144 (3 ) (83 ) 172,990 345,380 (21 ) 1,166 Charge-offs (a) (584,296 ) (427,079 ) — (695 ) (654,613 ) (457,102 ) — (1,586 ) Recoveries 396,667 216,050 — 180 405,702 193,392 — 265 Balance — end of period $ 1,641,214 $ 1,496,580 $ 158 $ 1,116 $ 1,760,809 $ 1,686,159 $ 713 $ 4,362 (a) For the three months ended June 30, 2018 and June 30, 2017 , charge-offs for retail installment contracts acquired individually includes approximately $7 million and $25 million , respectively, for the partial write-down of loans to the collateral value less estimated costs to sell, for which a bankruptcy notice was received. There is no additional credit loss allowance on these loans. Six Months Ended June 30, 2018 Six Months Ended June 30, 2017 Retail Installment Contracts Acquired Individually Receivables from Dealers Personal Loans Retail Installment Contracts Acquired Individually Receivables Personal Loans Non-TDR TDR Non-TDR TDR Balance — beginning of period $ 1,529,815 $ 1,731,320 $ 164 $ 2,565 $ 1,799,760 $ 1,611,295 $ 724 $ — Provision for credit losses 553,007 260,102 (6 ) (185 ) 515,082 632,385 (11 ) 9,141 Charge-offs (a) (1,263,735 ) (946,661 ) — (1,763 ) (1,388,767 ) (947,645 ) — (5,218 ) Recoveries 822,127 451,819 — 499 834,734 390,124 — 439 Balance — end of period $ 1,641,214 $ 1,496,580 $ 158 $ 1,116 $ 1,760,809 $ 1,686,159 $ 713 $ 4,362 (a) For the six months ended June 30, 2018 and June 30, 2017 , charge-offs for retail installment contracts acquired individually includes approximately $14 million and $48 million , respectively, for the partial write-down of loans to the collateral value less estimated costs to sell, for which a bankruptcy notice was received. There is no additional credit loss allowance on these loans.
Summary of Delinquencies	A summary of delinquencies as of June 30, 2018 and December 31, 2017 is as follows: June 30, 2018 Retail Installment Contracts Held for Investment Loans Acquired Individually Purchased Receivables Portfolios Total Principal, 30-59 days past due $ 2,532,058 $ 3,108 $ 2,535,166 Delinquent principal over 59 days (a) 1,149,429 1,981 1,151,410 Total delinquent principal $ 3,681,487 $ 5,089 $ 3,686,576 December 31, 2017 Retail Installment Contracts Held for Investment Loans Acquired Individually Purchased Receivables Portfolios Total Principal, 30-59 days past due $ 2,822,686 $ 4,992 $ 2,827,678 Delinquent principal over 59 days (a) 1,541,728 2,855 1,544,583 Total delinquent principal $ 4,364,414 $ 7,847 $ 4,372,261 (a) Interest is generally accrued until 60 days past due in accordance with the Company's accounting policy for retail installment contracts.
Summary of Financing Receivables on Nonaccrual Status	In addition, retail installment contracts acquired individually held for investment that were placed on nonaccrual status, as of June 30, 2018 and December 31, 2017 : June 30, 2018 December 31, 2017 Amount Percent (a) Amount Percent (a) Non-TDR $ 505,399 1.8 % $ 666,926 2.6 % TDR 1,554,860 5.7 % 1,390,373 5.4 % Total nonaccrual principal $ 2,060,259 7.5 % $ 2,057,299 7.9 % (a) Percent of unpaid principal balance of retail installment contracts individually held for investment. A summary of the Company’s TDRs that were placed on nonaccrual status at June 30, 2018 and December 31, 2017 , is as follows: June 30, December 31, 2017 Retail Installment Contracts (a) TDRs on cost recovery method (b) $ 1,161,487 $ 790,461 TDRs on cash basis accounting 393,373 599,912 Total nonaccrual TDR principal $ 1,554,860 $ 1,390,373 (a) The balances in the above table reflects total unpaid principal balance rather than net recorded investment before allowance. (b) Out of the total TDRs on cost recovery method, $1,022,007 and $652,679 of TDRs were less than 60 days past due as of June 30, 2018 and December 31, 2017 , respectively. The Company applied $142,523 and $56,740 of interest received, on these loans, towards recorded investment (as compared to interest income), in accordance with cost recovery method as of June 30, 2018 and December 31, 2017 , respectively.
Summary of Credit Risk Profile	A summary of the credit risk profile of the Company’s retail installment contracts held for investment by FICO ® distribution, determined at origination, as of June 30, 2018 and December 31, 2017 was as follows: FICO ® Band June 30, 2018 (b) December 31, 2017 (b) Commercial (a) 1.9% 2.5% No-FICOs 11.3% 11.2% <540 21.0% 21.8% 540-599 32.6% 32.0% 600-639 17.8% 17.4% >640 15.4% 15.1% (a) No FICO score is obtained on loans to commercial borrowers. (b) Percentages are based on unpaid principal balance.
Summary Commercial Loan Credit Quality Indicators	Fleet loan credit quality indicators for retail installment contracts held for investment with commercial borrowers as of June 30, 2018 and December 31, 2017 were as follows: June 30, December 31, Pass $ 9,974 $ 12,276 Special Mention 4,265 5,324 Substandard 434 715 Doubtful — — Loss — — Total (Unpaid principal balance) $ 14,673 $ 18,315 Commercial loan credit quality indicators for receivables from dealers held for investment as of June 30, 2018 and December 31, 2017 were as follows: June 30, December 31, Pass $ 15,167 $ 14,130 Special Mention 33 1,657 Substandard — — Doubtful — — Loss — — Total (Unpaid principal balance) $ 15,200 $ 15,787
Summary of TDRs	The table below presents the Company’s TDRs as of June 30, 2018 and December 31, 2017 : June 30, December 31, 2017 Retail Installment Contracts Outstanding recorded investment (a) $ 5,932,209 $ 6,261,432 Impairment (1,496,580 ) (1,731,320 ) Outstanding recorded investment, net of impairment $ 4,435,629 $ 4,530,112 (a) As of June 30, 2018 , the outstanding recorded investment excludes $78.3 million of collateral-dependent bankruptcy TDRs that has been written down by $33.2 million to fair value less cost to sell. As of December 31, 2017 , the outstanding recorded investment excludes $64.7 million of collateral-dependent bankruptcy TDRs that has been written down by $29.2 million to fair value less cost to sell.
Summary of Delinquent TDRs	A summary of the Company’s delinquent TDRs at June 30, 2018 and December 31, 2017 , is as follows: June 30, December 31, 2017 Retail Installment Contracts (a) Principal, 30-59 days past due $ 1,202,120 $ 1,332,239 Delinquent principal over 59 days 599,760 818,938 Total delinquent TDR principal $ 1,801,880 $ 2,151,177 (a) The balances in the above table reflects total unpaid principal balance rather than net recorded investment before allowance.
Average Recorded Investment and Income Recognized on TDR Loans	Average recorded investment and income recognized on TDR loans are as follows: Three Months Ended June 30, 2018 June 30, 2017 Retail Installment Contracts Average outstanding recorded investment in TDRs $ 5,978,346 $ 5,860,748 Interest income recognized $ 202,788 $ 224,810 Six Months Ended June 30, 2018 June 30, 2017 Retail Installment Contracts Average outstanding recorded investment in TDRs $ 6,084,560 $ 5,786,429 Interest income recognized $ 443,999 $ 485,162
Summary of Financial Effects of TDRs	The following table summarizes the financial effects, excluding impacts related to credit loss allowance and impairment, of TDRs (including collateral-dependent bankruptcy TDRs) that occurred for the three and six months ended June 30, 2018 and 2017 : Three Months Ended June 30, 2018 June 30, 2017 Retail Installment Contracts Outstanding recorded investment before TDR $ 723,925 $ 773,629 Outstanding recorded investment after TDR $ 725,438 $ 787,278 Number of contracts (not in thousands) 43,265 44,598 Six Months Ended June 30, 2018 June 30, 2017 Retail Installment Contracts Outstanding recorded investment before TDR $ 1,308,373 $ 1,655,328 Outstanding recorded investment after TDR $ 1,308,102 $ 1,653,556 Number of contracts (not in thousands) 77,639 94,097
Summary of Loan Restructuring Accounted for as TDRs	Loan restructurings accounted for as TDRs within the previous twelve months that subsequently defaulted during the three and six months ended June 30, 2018 and 2017 are summarized in the following table: Three Months Ended June 30, 2018 June 30, 2017 Retail Installment Contracts Recorded investment in TDRs that subsequently defaulted (a) $ 144,561 $ 190,467 Number of contracts (not in thousands) 8,707 10,622 Six Months Ended June 30, 2018 June 30, 2017 Retail Installment Contracts Recorded investment in TDRs that subsequently defaulted (a) $ 339,826 $ 402,164 Number of contracts (not in thousands) 20,247 22,516 (a) For TDR modifications and TDR modifications that subsequently defaults, the allowance methodology remains unchanged; however, the transition rates of the TDR loans are adjusted to reflect the respective risks.

Debt (Tables)

Debt (Tables)	6 Months Ended
	Jun. 30, 2018
Debt Disclosure [Abstract]
Schedule of Credit Facilities	The following table presents information regarding credit facilities as of June 30, 2018 and December 31, 2017 : June 30, 2018 Maturity Date(s) Utilized Balance Committed Amount Effective Rate Assets Pledged Restricted Cash Pledged Facilities with third parties: Warehouse line August 2019 $ 287,484 $ 500,000 3.56% $ 410,567 $ 24,525 Warehouse line Various (a) 518,345 1,250,000 3.36% 780,594 5,068 Warehouse line (b) August 2019 1,832,943 3,900,000 3.86% 2,310,677 10,261 Warehouse line December 2018 115,100 300,000 4.01% 181,621 855 Warehouse line October 2019 364,777 1,800,000 4.44% 529,183 180 Repurchase facility (d) Various (c) 179,934 179,934 3.78% 259,860 17,818 Repurchase facility (d) July 2018 (e) 92,167 92,167 3.51% 129,440 — Repurchase facility (d) September 2018 68,682 68,682 3.56% 92,358 — Repurchase facility (d) December 2018 115,307 115,307 3.58% 156,202 — Warehouse line November 2019 417,499 1,000,000 3.17% 632,984 8 Warehouse line October 2019 217,465 400,000 3.45% 328,840 158 Warehouse line November 2019 78,620 500,000 5.06% 89,182 411 Warehouse line October 2018 214,500 300,000 3.66% 248,608 333 Total facilities with third parties 4,502,823 10,406,090 6,150,116 59,617 Facilities with Santander and related subsidiaries: Line of credit (f) December 2018 — 1,000,000 3.09% — — Promissory Note (g) December 2022 250,000 250,000 3.95% — — Promissory Note (g) December 2021 250,000 250,000 3.70% — — Promissory Note (g) March 2019 300,000 300,000 3.38% — — Promissory Note (g) October 2020 400,000 400,000 3.10% — — Promissory Note (g) May 2020 500,000 500,000 3.49% — — Promissory Note (g) (h) March 2022 650,000 650,000 4.20% — — Promissory Note (g) August 2021 650,000 650,000 3.44% — — Line of credit (f) December 2018 122,200 750,000 4.60% 129,268 538 Line of credit (f) March 2019 — 3,000,000 3.94% — — Total facilities with Santander and related subsidiaries 3,122,200 7,750,000 129,268 538 Total revolving credit facilities $ 7,625,023 $ 18,156,090 $ 6,279,384 $ 60,155 (a) One-half of the outstanding balance on this facility matures in March 2019 and remaining balance matures in March 2020. (b) This line is held exclusively for financing of Chrysler Capital leases. (c) The maturity of this repurchase facility ranges from July 2018 to September 2018. Approximately 38% of this was matured and settled in July 2018. (d) These repurchase facilities are collateralized by securitization notes payable retained by the Company. These facilities have rolling maturities of up to one year . As the borrower, we are exposed to liquidity risk due to changes in the market value of the retained securities pledged. In some instances, we place or receive cash collateral with counterparties under collateral arrangements associated with our repurchase agreements. (e) This repurchase facility was settled on maturity in July 2018. (f) These lines are also collateralized by securitization notes payable and residuals retained by the Company. (g) As of June 30, 2018 and December 31, 2017 , $3,000,000 and $3,000,000 , respectively, of the aggregate outstanding balances on these facilities were unsecured. (h) In 2017, the Company entered into an interest rate swap to hedge the interest rate risk on this fixed rate debt. This derivative was designated as fair value hedge at inception. This was later terminated and the unamortized fair value hedge adjustment as of June 30, 2018 and December 31, 2017 was $3,763 and $4,223 , respectively, the amortization of which will reduce interest expense over the remaining life of the fixed rate debt. December 31, 2017 Maturity Date(s) Utilized Balance Committed Amount Effective Rate Assets Pledged Restricted Cash Pledged Facilities with third parties: Warehouse line January 2018 $ 336,484 $ 500,000 2.87% $ 473,208 $ — Warehouse line Various 339,145 1,250,000 2.53% 461,353 12,645 Warehouse line August 2019 2,044,843 3,900,000 2.96% 2,929,890 53,639 Warehouse line December 2018 — 300,000 1.49% — — Warehouse line October 2019 226,577 1,800,000 4.95% 311,336 6,772 Repurchase facility Various 325,775 325,775 3.24% 474,188 13,842 Repurchase facility April 2018 202,311 202,311 2.67% 264,120 — Repurchase facility March 2018 147,500 147,500 3.91% 222,108 — Repurchase facility March 2018 68,897 68,897 3.04% 95,762 — Warehouse line November 2019 403,999 1,000,000 2.66% 546,782 14,729 Warehouse line October 2019 81,865 400,000 4.09% 114,021 3,057 Warehouse line November 2019 435,220 500,000 1.92% 521,365 16,866 Warehouse line October 2018 235,700 300,000 2.84% 289,634 10,474 Total facilities with third parties 4,848,316 10,694,483 6,703,767 132,024 Facilities with Santander and related subsidiaries: Line of credit December 2018 — 1,000,000 3.09% — — Promissory Note December 2021 250,000 250,000 3.70% — — Promissory Note December 2022 250,000 250,000 3.95% — — Promissory Note March 2019 300,000 300,000 2.67% — — Promissory Note October 2020 400,000 400,000 3.10% — — Promissory Note May 2020 500,000 500,000 3.49% — — Promissory Note March 2022 650,000 650,000 4.20% — — Promissory Note August 2021 650,000 650,000 3.44% — — Line of credit December 2018 750,000 750,000 1.33% — — Line of credit March 2019 — 3,000,000 3.94% — — Total facilities with Santander and related subsidiaries 3,750,000 7,750,000 — — Total revolving credit facilities $ 8,598,316 $ 18,444,483 $ 6,703,767 $ 132,024
Summary of Secured Structured Financings	The following table presents information regarding secured structured financings as of June 30, 2018 and December 31, 2017 : June 30, 2018 Estimated Maturity Date(s) Balance Initial Note Amounts Issued Initial Weighted Average Interest Rate Collateral (b) Restricted Cash 2014 Securitizations February 2020 - April 2022 $ 830,449 $ 6,391,020 1.16% - 1.72% $ 995,784 $ 204,967 2015 Securitizations April 2021 - January 2023 2,075,021 9,054,732 1.33% - 2.29% 2,634,724 343,060 2016 Securitizations April 2022 - March 2024 2,694,694 7,462,790 1.63% - 2.80% 3,723,193 321,888 2017 Securitizations April 2023 - September 2024 5,646,607 9,296,570 1.35% - 2.52% 7,666,331 419,569 2018 Securitizations December 2022 - October 2025 7,349,419 7,677,570 2.41% - 3.53% 8,811,769 299,108 Public Securitizations (a) 18,596,190 39,882,682 23,831,801 1,588,592 2011 Private issuance September 2028 153,881 1,700,000 1.46% 277,894 102 2013 Private issuances August 2021-September 2024 1,391,968 2,044,054 1.28% - 1.38% 2,558,503 5,383 2014 Private issuance November 2021 52,955 1,239,271 1.10% - 1.40% 136,946 6,649 2015 Private issuances July 2019 - September 2021 1,413,139 2,305,062 0.88% - 2.80% 460,556 2,986 2016 Private issuances May 2020 - September 2024 892,712 3,050,000 1.55% - 2.86% 1,410,208 3,113 2017 Private issuances April 2021 - September 2021 991,766 1,600,000 1.85% - 2.44% 1,215,294 5,992 2018 Private issuance June 2022 - January 2023 808,209 1,000,002 2.42% - 2.89% 938,604 2,450 Privately issued amortizing notes 5,704,630 12,938,389 6,998,005 26,675 Total secured structured financings $ 24,300,820 $ 52,821,071 $ 30,829,806 $ 1,615,267 (a) Securitizations executed under Rule 144A of the Securities Act are included within this balance. (b) Secured structured financings may be collateralized by the Company's collateral overages of other issuances. December 31, 2017 Estimated Maturity Date(s) Balance Initial Note Amounts Issued Initial Weighted Average Interest Rate Collateral Restricted Cash 2013 Securitizations January 2019 - March 2021 $ 418,806 $ 4,239,700 0.89% - 1.59% $ 544,948 $ 125,696 2014 Securitizations February 2020 - April 2022 1,150,422 6,391,020 1.16% - 1.72% 1,362,814 210,937 2015 Securitizations September 2019 - January 2023 2,484,051 9,171,332 1.33% - 2.29% 3,465,671 366,062 2016 Securitizations April 2022 - March 2024 3,596,822 7,462,790 1.63% - 2.80% 4,798,807 344,899 2017 Securitizations April 2023 - September 2024 7,343,157 9,535,800 2.01% - 2.52% 9,701,381 422,865 Public Securitizations 14,993,258 36,800,642 19,873,621 1,470,459 2011 Private issuance September 2028 281,946 1,700,000 1.46% 398,051 20,356 2013 Private issuances August 2021 - September 2024 2,292,279 2,044,054 1.28% - 1.38% 3,719,148 155,066 2014 Private issuances March 2018 - November 2021 117,730 1,538,087 1.05% - 1.40% 231,997 9,552 2015 Private issuances November 2018 - September 2021 2,009,627 2,305,062 0.88% - 4.09% 988,247 55,451 2016 Private issuances May 2020 - September 2024 1,489,464 3,050,000 1.55% - 2.86% 2,147,988 89,460 2017 Private issuances April 2021 - September 2021 1,373,591 1,641,079 1.85% - 2.27% 1,747,227 47,415 Privately issued amortizing notes 7,564,637 12,278,282 9,232,658 377,300 Total secured structured financings $ 22,557,895 $ 49,078,924 $ 29,106,279 $ 1,847,759

Variable Interest Entities (Tab

Variable Interest Entities (Tables)	6 Months Ended
	Jun. 30, 2018
Variable Interest Entity Disclosure [Abstract]
Summary of Cash Flows Received from Consolidated Securitization Trusts	A summary of the cash flows received from off-balance sheet securitization trusts during the three and six months ended June 30, 2018 and 2017 is as follows: Three Months Ended Six Months Ended June 30, 2018 June 30, 2017 June 30, 2018 June 30, 2017 Receivables securitized (a) $ 1,156,060 $ 536,309 $ 2,631,313 $ 1,236,331 Net proceeds from new securitizations $ 1,160,119 $ 538,478 $ 2,634,939 $ 1,240,797 Cash received for servicing fees 12,616 11,970 20,694 13,368 Total cash received from securitization trusts $ 1,172,735 $ 550,448 $ 2,655,633 $ 1,254,165 (a) Represents the unpaid principal balance at the time of original securitization. A summary of the cash flows received from consolidated securitization trusts during the three and six months ended June 30, 2018 and 2017 , is as follows: Three Months Ended Six Months Ended June 30, 2018 June 30, 2017 June 30, 2018 June 30, 2017 Assets securitized $ 6,511,953 $ 4,750,103 $ 13,752,897 $ 12,396,728 Net proceeds from new securitizations (a) $ 4,581,874 $ 3,485,091 $ 8,058,196 $ 9,061,892 Net proceeds from sale of retained bonds 382,022 157,763 593,632 273,733 Cash received for servicing fees (b) 213,900 215,994 429,690 424,917 Net distributions from Trusts (b) 780,834 729,557 1,325,986 1,407,786 Total cash received from Trusts $ 5,958,630 $ 4,588,405 $ 10,407,504 $ 11,168,328 (a) Includes additional advances on existing securitizations. (b) These amounts are not reflected in the accompanying condensed consolidated statements of cash flows because these cash flows are intra-company and eliminated in consolidation.
Off-balance Sheet Variable Interest Entities Portfolio	The portfolio was comprised as follows: June 30, 2018 December 31, 2017 SPAIN $ 3,967,665 $ 2,024,016 Total serviced for related parties 3,967,665 2,024,016 Chrysler Capital securitizations 960,057 1,404,232 Total serviced for third parties 960,057 1,404,232 Total serviced for others portfolio $ 4,927,722 $ 3,428,248

Derivative Financial Instrume31

Derivative Financial Instruments (Tables)	6 Months Ended
	Jun. 30, 2018
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 derivatives financial instruments at June 30, 2018 and December 31, 2017 , are as follows: June 30, 2018 Notional Fair Value Asset Liability Interest rate swap agreements designated as cash flow hedges $ 4,197,700 $ 74,110 $ 74,110 $ — Interest rate swap agreements not designated as hedges 2,613,800 19,596 19,596 — Interest rate cap agreements 9,207,853 198,933 198,933 — Options for interest rate cap agreements 9,207,853 (199,131 ) — (199,131 ) December 31, 2017 Notional Fair Value Asset Liability Interest rate swap agreements designated as cash flow hedges $ 4,926,900 $ 45,986 $ 45,986 $ — Interest rate swap agreements not designated as hedges 1,736,400 9,596 9,596 — Interest rate cap agreements 10,906,081 103,721 135,830 (32,109 ) Options for interest rate cap agreements 10,906,081 (103,659 ) 32,165 (135,824 )
Schedule of Offsetting Financial Assets	Gross Amounts Not Offset in the Assets Presented Cash Net June 30, 2018 Interest rate swaps - third party (b) $ 93,706 $ (61,355 ) $ 32,351 Interest rate caps - Santander and affiliates 14,111 (12,240 ) 1,871 Interest rate caps - third party 184,822 (81,597 ) 103,225 Total derivatives subject to a master netting arrangement or similar arrangement 292,639 (155,192 ) 137,447 Total derivatives not subject to a master netting arrangement or similar arrangement — — — Total derivative assets $ 292,639 $ (155,192 ) $ 137,447 Total financial assets $ 292,639 $ (155,192 ) $ 137,447 December 31, 2017 Interest rate swaps - Santander and affiliates $ 8,621 $ (3,461 ) $ 5,160 Interest rate swaps - third party 46,961 (448 ) 46,513 Interest rate caps - Santander and affiliates 18,201 (12,240 ) 5,961 Interest rate caps - third party 149,794 (55,835 ) 93,959 Total derivatives subject to a master netting arrangement or similar arrangement 223,577 (71,984 ) 151,593 Total derivatives not subject to a master netting arrangement or similar arrangement — — — Total derivative assets $ 223,577 $ (71,984 ) $ 151,593 Total financial assets $ 223,577 $ (71,984 ) $ 151,593 (a) Cash collateral received is reported in Other liabilities or Due to affiliate, as applicable, in the consolidated balance sheet. (b) Includes derivative instruments originally transacted with Santander and affiliates and subsequently amended to reflect clearing with central clearing counterparties.
Schedule of Offsetting Financial Liabilities	Gross Amounts Not Offset in the Liabilities Presented Cash Net June 30, 2018 Back to back - Santander & affiliates $ 14,111 $ (14,111 ) $ — Back to back - third party 185,020 (185,020 ) — Total derivatives subject to a master netting arrangement or similar arrangement 199,131 (199,131 ) — Total derivatives not subject to a master netting arrangement or similar arrangement — — — Total derivative liabilities $ 199,131 $ (199,131 ) $ — Total financial liabilities $ 199,131 $ (199,131 ) $ — December 31, 2017 Back to back - Santander & affiliates 18,201 (18,201 ) — Back to back - third party 149,732 (133,540 ) 16,192 Total derivatives subject to a master netting arrangement or similar arrangement 167,933 (151,741 ) 16,192 Total derivatives not subject to a master netting arrangement or similar arrangement — — — Total derivative liabilities $ 167,933 $ (151,741 ) $ 16,192 Total financial liabilities $ 167,933 $ (151,741 ) $ 16,192 (a) Cash collateral pledged is reported in Other assets or Due from affiliate, as applicable, in the consolidated balance sheet. In certain instances, the Company is over-collateralized since the actual amount of cash pledged as collateral exceeds the associated financial liability. As a result, the actual amount of cash collateral pledged that is reported in Other assets or Due from affiliates may be greater than the amount shown in the table above.
Gross Gains (Losses) Reclassified from Accumulated Other Comprehensive Income (Loss)	The impacts on the condensed consolidated statements of income and comprehensive income for the three and six months ended June 30, 2018 and 2017 were as follows: Three Months Ended June 30, 2018 Recognized in Earnings Gross Gains Recognized in Accumulated Other Comprehensive Income (Loss) Gross amount Reclassified From Accumulated Other Comprehensive Interest rate swap agreements designated as cash flow hedges $ — $ 8,412 $ 9,095 Total $ — $ 8,412 $ 9,095 Derivative instruments not designated as hedges Losses (Gains) recognized in interest expenses (22 ) Three Months Ended June 30, 2017 Recognized in Earnings Gross Gains (Losses) Recognized in Accumulated Other Comprehensive Income (Loss) Gross Gains (Losses) Reclassified From Accumulated Other Comprehensive Interest rate swap agreements designated as cash flow hedges $ (9,895 ) $ (2,217 ) $ (8,859 ) Interest rate swap agreements designated as fair value hedges $ 1,232 $ — $ — Total $ (8,663 ) $ (2,217 ) $ (8,859 ) Derivative instruments not designated as hedges Losses (Gains) recognized in operating expenses $ (272 ) Six Months Ended June 30, 2018 Recognized in Earnings Gross Gains Recognized in Accumulated Other Comprehensive Income (Loss) Gross amount Reclassified From Accumulated Other Comprehensive Interest rate swap agreements designated as cash flow hedges $ — $ 34,841 $ 13,672 Total $ — $ 34,841 $ 13,672 Derivative instruments not designated as hedges: Losses (Gains) recognized in interest expenses $ (9,739 ) Six Months Ended June 30, 2017 Recognized in Earnings Gross Gains Recognized in Accumulated Other Comprehensive Income (Loss) Gross amount Reclassified From Accumulated Other Comprehensive Interest rate swap agreements designated as cash flow hedges $ (9,512 ) $ 5,115 $ (4,619 ) Interest rate swap agreements designated as fair value hedges $ 1,232 — — Total $ (8,280 ) $ 5,115 $ (4,619 ) Derivative instruments not designated as hedges: Losses (Gains) recognized in operating expenses $ 426
Gross Gains (Losses) Reclassified from Accumulated Other Comprehensive Income (Loss)	The impacts on the condensed consolidated statements of income and comprehensive income for the three and six months ended June 30, 2018 and 2017 were as follows: Three Months Ended June 30, 2018 Recognized in Earnings Gross Gains Recognized in Accumulated Other Comprehensive Income (Loss) Gross amount Reclassified From Accumulated Other Comprehensive Interest rate swap agreements designated as cash flow hedges $ — $ 8,412 $ 9,095 Total $ — $ 8,412 $ 9,095 Derivative instruments not designated as hedges Losses (Gains) recognized in interest expenses (22 ) Three Months Ended June 30, 2017 Recognized in Earnings Gross Gains (Losses) Recognized in Accumulated Other Comprehensive Income (Loss) Gross Gains (Losses) Reclassified From Accumulated Other Comprehensive Interest rate swap agreements designated as cash flow hedges $ (9,895 ) $ (2,217 ) $ (8,859 ) Interest rate swap agreements designated as fair value hedges $ 1,232 $ — $ — Total $ (8,663 ) $ (2,217 ) $ (8,859 ) Derivative instruments not designated as hedges Losses (Gains) recognized in operating expenses $ (272 ) Six Months Ended June 30, 2018 Recognized in Earnings Gross Gains Recognized in Accumulated Other Comprehensive Income (Loss) Gross amount Reclassified From Accumulated Other Comprehensive Interest rate swap agreements designated as cash flow hedges $ — $ 34,841 $ 13,672 Total $ — $ 34,841 $ 13,672 Derivative instruments not designated as hedges: Losses (Gains) recognized in interest expenses $ (9,739 ) Six Months Ended June 30, 2017 Recognized in Earnings Gross Gains Recognized in Accumulated Other Comprehensive Income (Loss) Gross amount Reclassified From Accumulated Other Comprehensive Interest rate swap agreements designated as cash flow hedges $ (9,512 ) $ 5,115 $ (4,619 ) Interest rate swap agreements designated as fair value hedges $ 1,232 — — Total $ (8,280 ) $ 5,115 $ (4,619 ) Derivative instruments not designated as hedges: Losses (Gains) recognized in operating expenses $ 426

Other Assets (Tables)

Other Assets (Tables)	6 Months Ended
	Jun. 30, 2018
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Schedule of Other Assets	Other assets were comprised as follows: June 30, December 31, Vehicles (a) $ 254,086 $ 293,546 Manufacturer subvention payments receivable (b) 163,775 83,910 Upfront fee (b) 72,500 80,000 Derivative assets at fair value (c) 278,528 196,755 Derivative - third party collateral 190,609 149,805 Prepaids 30,459 40,830 Accounts receivable 26,459 38,583 Other 45,824 29,815 Other assets $ 1,062,240 $ 913,244 (a) Includes vehicles recovered through repossession as well as vehicles recovered due to lease terminations. (b) These amounts relate to the Chrysler Agreement. The Company paid a $150,000 upfront fee upon the May 2013 inception of the Chrysler Agreement. The fee is being amortized into finance and other interest income over a ten -year term. As the preferred financing provider for FCA, the Company is entitled to subvention payments on loans and leases with below-market customer payments. Exercise of the equity option by FCA would be considered a triggering event requiring re-evaluation of whether or not the remaining unamortized balance of the upfront fee should be impaired. FCA has not yet delivered to the Company a notice of intent to exercise its option. (c) Derivative assets at fair value represent the gross amount of derivatives presented in the condensed consolidated financial statements. Refer to Note 7 to these Condensed Consolidated Financial Statements for the detail of these amounts.

Commitments and Contingencies (

Commitments and Contingencies (Tables)	6 Months Ended
	Jun. 30, 2018
Commitments and Contingencies Disclosure [Abstract]
Summary of Liabilities for Commitments and Contingencies	The following table summarizes liabilities recorded for commitments and contingencies as of June 30, 2018 and December 31, 2017 , all of which are included in accounts payable and accrued expenses in the accompanying condensed consolidated balance sheets: Agreement or Legal Matter Commitment or Contingency June 30, 2018 December 31, 2017 Chrysler Agreement Revenue-sharing and gain-sharing payments $ 11,053 $ 6,580 Agreement with Bank of America Servicer performance fee 6,996 8,072 Agreement with CBP Loss-sharing payments 4,977 5,625 Other Contingencies Consumer arrangements 14,339 6,326 Legal and regulatory proceedings Aggregate legal and regulatory liabilities 112,500 108,800
Schedule of Future Minimum Rental Payments for Operating Leases	The remaining obligations under lease commitments at June 30, 2018 are as follows: Years ended December 31, 2018 $ 6,260 2019 12,817 2020 13,080 2021 12,940 2022 12,282 Thereafter 44,663 Total $ 102,042

Related-Party Transactions (Tab

Related-Party Transactions (Tables)	6 Months Ended
	Jun. 30, 2018
Related Party Transactions [Abstract]
Schedule of Related Party Transactions	Other information on the relating to SPAIN securitization platform for the three and six months ended June 30, 2018 and June 30, 2017 is as follows: Three Months Ended Six Months Ended June 30, 2018 June 30, 2017 June 30, 2018 June 30, 2017 Servicing fee income $ 8,622 $ 890 $ 15,822 $ 890 Loss(Gain) on sale, excluding lower of cost or market adjustments (if any) 3,177 3,461 20,080 6,180 Other information on the serviced auto loan and retail installment contract portfolios for SBNA as of June 30, 2018 and December 31, 2017 is as follows: June 30, December 31, Total serviced portfolio $ 447,228 $ 522,219 Cash collections due to owner 13,478 12,306 Servicing fees receivable 845 943 Other information related to the above transactions with SBNA as of June 30, 2018 and December 31, 2017 is as follows: Three Months Ended Six Months Ended June 30, 2018 June 30, 2017 June 30, 2018 June 30, 2017 Origination and renewal fee income from SBNA (a) $ 1,232 $ 640 $ 2,072 $ 1,546 Servicing fees expenses charged by SBNA (b) 20 26 39 56 (a) As of June 30, 2018 and December 31, 2017 , the Company had origination and renewal fees receivable from SBNA of $608 and $369 , respectively. (b) As of June 30, 2018 and December 31, 2017 , the Company had $9 and $9 , respectively, of servicing fees payable to SBNA, respectively . Interest expense, including unused fees, for affiliate lines/letters of credit for the three and six months ended June 30, 2018 and 2017 , was as follows: Three Months Ended Six Months Ended June 30, 2018 June 30, 2017 June 30, 2018 June 30, 2017 Line of credit agreement with Santander - New York Branch (Note 5) $ 5,741 $ 15,490 $ 10,108 $ 38,466 Debt facilities with SHUSA (Note 5) 36,561 20,261 72,407 32,894 Accrued interest for affiliate lines/letters of credit at June 30, 2018 and December 31, 2017 , was as follows: June 30, December 31, 2017 Line of credit agreement with Santander - New York Branch (Note 5) $ 1,787 $ 1,435 Debt facilities with SHUSA (Note 5) 18,225 18,670 Other information on the consumer vehicle lease portfolio serviced for SBNA as of June 30, 2018 and December 31, 2017 is as follows: June 30, December 31, Total serviced portfolio $ 7,042 $ 321,629 Origination and servicing fees receivable 113 2,067 Revenue share reimbursement receivable 1,042 1,548

Computation of Basic and Dilu35

Computation of Basic and Diluted Earnings per Common Share (Tables)	6 Months Ended
	Jun. 30, 2018
Earnings Per Share [Abstract]
Summary of Computation of Basic and Diluted Earnings per Common Share	The following table represents EPS numbers for the three and six months ended June 30, 2018 and 2017 : Three Months Ended Six Months Ended 2018 2017 2018 2017 Earnings per common share Net income $ 334,641 $ 264,675 $ 576,940 $ 408,102 Weighted average number of common shares outstanding before restricted participating shares (in thousands) 361,268 359,311 360,987 359,134 Weighted average number of participating restricted common shares outstanding (in thousands) — 150 — 150 Weighted average number of common shares outstanding (in thousands) 361,268 359,461 360,987 359,284 Earnings per common share $ 0.93 $ 0.74 $ 1.60 $ 1.14 Earnings per common share - assuming dilution Net income $ 334,641 $ 264,675 $ 576,940 $ 408,102 Weighted average number of common shares outstanding (in thousands) 361,268 359,461 360,987 359,284 Effect of employee stock-based awards (in thousands) 790 368 842 644 Weighted average number of common shares outstanding - assuming dilution (in thousands) 362,058 359,829 361,829 359,928 Earnings per common share - assuming dilution $ 0.92 $ 0.74 $ 1.59 $ 1.13

Fair Value of Financial Instr36

Fair Value of Financial Instruments (Tables)	6 Months Ended
	Jun. 30, 2018
Fair Value Disclosures [Abstract]
Summary of Fair Value Estimates, Methods and Assumptions	The following tables present the carrying value and estimated fair value of the Company’s financial assets and liabilities disclosed, but not carried, at fair value at June 30, 2018 and December 31, 2017 , and the level within the fair value hierarchy: June 30, 2018 Carrying Estimated Level 1 Level 2 Level 3 Assets: Cash and cash equivalents (a) $ 319,688 $ 319,688 $ 319,688 $ — $ — Finance receivables held for investment, net (b) 23,917,404 25,331,074 — — 25,331,074 Restricted cash (a) 2,125,410 2,125,410 2,125,410 — — Total $ 26,362,502 $ 27,776,172 $ 2,445,098 $ — $ 25,331,074 Liabilities: Notes payable — credit facilities (c) $ 4,502,823 $ 4,502,823 $ — $ — $ 4,502,823 Notes payable — secured structured financings (d) 24,300,820 24,352,684 — 16,462,852 7,889,832 Notes payable — related party (e) 3,125,963 3,068,515 — — 3,068,515 Total $ 31,929,606 $ 31,924,022 $ — $ 16,462,852 $ 15,461,170 December 31, 2017 Carrying Estimated Level 1 Level 2 Level 3 Assets: Cash and cash equivalents (a) $ 527,805 $ 527,805 $ 527,805 $ — $ — Finance receivables held for investment, net (b) 22,284,068 24,340,739 — — 24,340,739 Restricted cash (a) 2,553,902 2,553,902 2,553,902 — — Total $ 25,365,775 $ 27,422,446 $ 3,081,707 $ — $ 24,340,739 Liabilities: Notes payable — credit facilities (c) $ 4,848,316 $ 4,848,316 $ — $ — $ 4,848,316 Notes payable — secured structured financings (d) 22,557,895 22,688,381 — 12,275,408 10,412,973 Notes payable — related party (e) 3,754,223 3,754,223 — — 3,754,223 Total $ 31,160,434 $ 31,290,920 $ — $ 12,275,408 $ 19,015,512 (a) Cash and cash equivalents and restricted cash — The carrying amount of cash and cash equivalents, including restricted cash, is at an approximated fair value as the instruments mature within 90 days or less and bear interest at market rates. (b) Finance receivables held for investment, net — Finance receivables held for investment, net are carried at amortized cost, net of an allowance. These receivables exclude retail installment contracts that are measured at fair value on a recurring and nonrecurring basis. The estimated fair value for the underlying financial instruments are determined as follows: • Retail installment contracts held for investment and purchased receivables — The estimated fair value is calculated based on a DCF in which the Company uses significant unobservable inputs on key assumptions, including historical default rates and adjustments to reflect prepayment rates, expected recovery rates, discount rates reflective of the cost of funding, and credit loss expectations. • Capital lease receivables — Capital lease receivables are carried at gross investments, net of unearned income and allowance for lease losses. Management believes that the terms of these credit agreements approximate market terms for similar credit agreements. • Receivables from dealers and personal loans held for investment — Receivables from dealers and personal loans held for investment are carried at amortized cost, net of credit loss allowance. Management believes that the terms of these credit agreements approximate market terms for similar credit agreements. (c) Notes payable — credit facilities — The carrying amount of notes payable related to revolving credit facilities is estimated to approximate fair value. Management believes that the terms of these credit agreements approximate market terms for similar credit agreements as the facilities are subject to short-term floating interest rates that approximate rates available to the Company. (d) Notes payable — secured structured financings — The estimated fair value of notes payable related to secured structured financings is calculated based on market observable prices and spreads for the Company's publicly traded debt and market observed prices of similar notes issued by the Company, or recent market transactions involving similar debt with similar credit risks, which are considered level 2 inputs. The estimated fair value of notes payable related to privately issued amortizing notes is calculated based on a combination of credit enhancement review, discounted cash flow analysis and review of market observable spreads for similar liabilities. In conducting this analysis, the Company uses significant unobservable inputs on key assumptions, including historical default rates, prepayment rates, discount rates reflective of the cost of funding, and credit loss expectations, which are considered level 3 inputs. (e) Notes payable — related party — The carrying amount of floating rate notes payable to a related party is estimated to approximate fair value as the facilities are subject to short-term floating interest rates that approximate rates available to the Company. The fair value premium/discount of the fixed rate promissory notes are derived from changes in the Company's unsecured cost of funds since the time of issuance and weighted average life of these notes.
Assets and Liabilities Measured at Fair Value on a Recurring Basis	The following tables present the Company’s assets and liabilities that are measured at fair value on a recurring basis at June 30, 2018 and December 31, 2017 , and the level within the fair value hierarchy: Fair Value Measurements at June 30, 2018 Total Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Other assets — trading interest rate caps (a) $ 184,822 $ — $ 184,822 $ — Due from affiliates — trading interest rate caps (a) 14,111 — 14,111 — Other assets — cash flow hedging interest rate swaps (a) 74,110 — 74,110 — Other assets — trading interest rate swaps (a) 19,596 — 19,596 — Other liabilities — trading options for interest rate caps (a) 185,020 — 185,020 — Due to affiliates — trading options for interest rate caps (a) 14,111 — 14,111 — Retail installment contracts acquired individually (b) 17,182 — — 17,182 Fair Value Measurements at December 31, 2017 Total Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Other assets — trading interest rate caps (a) $ 129,718 $ — $ 129,718 $ — Due from affiliates — trading interest rate caps (a) 6,112 — 6,112 — Other assets — cash flow hedging interest rate swaps (a) 39,036 — 39,036 — Due from affiliates — cash flow hedging interest rate swaps (a) 6,950 — 6,950 — Other assets — trading interest rate swaps (a) 7,925 — 7,925 — Due from affiliates — trading interest rate swaps (a) 1,671 — 1,671 — Other assets — trading options for interest rate caps (a) 20,075 — 20,075 — Due from affiliates — trading options for interest rate caps (a) 12,090 — 12,090 — Other liabilities — trading options for interest rate caps (a) 129,712 — 129,712 — Due to affiliates — trading options for interest rate caps (a) 6,112 — 6,112 — Other liabilities — trading interest rate caps (a) 20,019 — 20,019 — Due to affiliates — trading interest rate caps (a) 12,090 — 12,090 — Retail installment contracts acquired individually (b) 22,124 — — 22,124 (a) The valuation is determined using widely accepted valuation techniques including a DCF 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) For certain retail installment contracts reported in finance receivables held for investment, net, the Company has elected the fair value option. The fair values of the retail installment contracts are estimated using a DCF model. When estimating the fair value using this model, the Company uses significant unobservable inputs on key assumptions, which includes historical default rates and adjustments to reflect prepayment rates based on available data from a comparable market securitization of similar assets, discount rates reflective of the cost of funding of debt issuance and recent historical equity yields, and recovery rates based on the average severity utilizing reported severity rates and loss severity utilizing available market data from a comparable securitized pool. Accordingly, retail installment contracts held for investment are classified as Level 3. Changes in the fair value are recorded in investment gains (losses), net in the condensed consolidated statement of income.
Changes in Level 3 Balances, Assets	The following table presents the changes in retail installment contracts held for investment balances classified as Level 3 balances for the three and six months ended June 30, 2018 and 2017 : Three Months Ended June 30, Six Months Ended June 30, 2018 2017 2018 2017 Balance — beginning of period $ 18,850 $ 30,652 $ 22,124 $ 24,495 Additions / issuances 1,927 6,396 3,276 19,727 Net collection activities (3,936 ) (6,998 ) (9,530 ) (17,123 ) Gains recognized in earnings 341 439 1,312 3,390 Balance — end of period $ 17,182 $ 30,489 $ 17,182 $ 30,489
Change in Level 3 Balances, Liabilities	The following table presents the changes in the total return settlement balance, which was classified as Level 3, for the three and six months ended June 30, 2017 : Three Months Ended Six Months Ended Balance — beginning of period $ 31,123 $ 30,618 (Gains)/losses recognized in earnings — 505 Balance — end of period $ 31,123 $ 31,123
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, 2018 and December 31, 2017 , and are categorized using the fair value hierarchy: Fair Value Measurements at June 30, 2018 Total Quoted Prices Significant Significant Lower of cost or fair value expense for the six months ended June 30, 2018 Other assets — vehicles (a) $ 254,086 $ — $ 254,086 $ — $ — Personal loans held for sale (b) 956,455 — — 956,455 134,688 Retail installment contracts held for sale (c) 290,277 — — 290,277 15,026 Auto loans impaired due to bankruptcy (d) 162,184 — 162,184 88,812 Fair Value Measurements at December 31, 2017 Total Quoted Prices Significant Significant Lower of cost or fair value expense for the year ended December 31, 2017 Other assets — vehicles (a) $ 293,546 $ — $ 293,546 $ — $ — Personal loans held for sale (b) 1,062,089 — — 1,062,089 374,374 Retail installment contracts held for sale (c) 1,148,332 — — 1,148,332 11,686 Auto loans impaired due to bankruptcy (d) 121,578 — 121,578 — 75,194 ( a) The Company estimates the fair value of its vehicles, which are obtained either through repossession or lease termination, using historical auction rates and current market levels of used car prices. (b) The estimated fair value for personal loans held for sale is calculated based on the lower of market participant view and a DCF analysis in which the Company uses significant unobservable inputs on key assumptions, including historical default rates and adjustments to reflect prepayment rates, discount rates reflective of the cost of funding, and credit loss expectations. The lower of cost or fair value adjustment for personal loans held for sale includes customer default activity and adjustments related to the net change in the portfolio balance during the reporting period. (c) Represents retail installment contract held for sale reserved for future SPAIN transactions. At June 30, 2018 , as the SPAIN ABS platform matures with several market executions over the last few quarters, the fair value of these installment contracts are estimated based on contractual pricing methodology used for previous SPAIN transactions. This pricing methodology includes consideration of significant unobservable inputs including investor return expectations (i.e., Yield), expected lifetime cumulative net loss and weighted average life of the retail installment contracts. At December 31, 2017 , the estimated fair value was calculated based on a DCF analysis in which the Company used significant unobservable inputs on key assumptions, including expected default rates, prepayment rates, recovery rates, and discount rates reflective of the cost of funds and appropriate rate of returns. The change in methodology did not have a material impact on the fair value mark of the retail installments contacts held for sale. (d) For loans that are considered collateral-dependent, such as certain bankruptcy loans, impairment is measured based on the fair value of the collateral, less its estimated cost to sell. For the underlying collateral, the estimated fair value is obtained using historical auction rates and current market levels of used car prices.
Quantitative Information About Significant Unobservable Inputs for Liabilities Measured at Fair Value	The following table presents quantitative information about the significant unobservable inputs for assets and liabilities measured at fair value on a recurring and nonrecurring basis at June 30, 2018 and December 31, 2017 : Financial Instruments Fair Value at June 30, 2018 Valuation Technique Unobservable Inputs Range Financial Assets: Retail installment contracts held for investment $ 17,182 Discounted Cash Flow Discount Rate 8%-10% Default Rate 15%-20% Prepayment Rate 6%-8% Loss Severity Rate 50%-60% Personal loans held for sale $ 956,455 Lower of Market or Income Approach Market Approach Market Participant View 70%-80% Income Approach Discount Rate 15%-25% Default Rate 30%-40% Net Principal Payment Rate 50%-70% Loss Severity Rate 90%-95% Retail installment contracts held for sale $ 290,277 Income Approach Expected Yield 1%-2% Expected Lifetime Cumulative Net Loss 4%-6% Weighted Average Life 2 - 3 years Financial Instruments Fair Value at December 31, 2017 Valuation Technique Unobservable Inputs Range Financial Assets: Retail installment contracts held for investment $ 22,124 Discounted Cash Flow Discount Rate 8%-10% Default Rate 15%-20% Prepayment Rate 6%-8% Loss Severity Rate 50%-60% Personal loans held for sale $ 1,062,089 Lower of Market or Income Approach Market Approach Market Participant View 70%-80% Income Approach Discount Rate 15%-20% Default Rate 30%-40% Net Principal Payment Rate 50%-70% Loss Severity Rate 90%-95% Retail installment contracts held for sale $ 1,148,332 Discounted Cash Flow Discount Rate 3%-6% Default Rate 3%-4% Prepayment Rate 15%-20% Loss Severity Rate 50%-60% The following table presents quantitative information about the significant unobservable inputs for assets and liabilities measured at fair value on a recurring and nonrecurring basis at June 30, 2018 and December 31, 2017 : Financial Instruments Fair Value at June 30, 2018 Valuation Technique Unobservable Inputs Range Financial Assets: Retail installment contracts held for investment $ 17,182 Discounted Cash Flow Discount Rate 8%-10% Default Rate 15%-20% Prepayment Rate 6%-8% Loss Severity Rate 50%-60% Personal loans held for sale $ 956,455 Lower of Market or Income Approach Market Approach Market Participant View 70%-80% Income Approach Discount Rate 15%-25% Default Rate 30%-40% Net Principal Payment Rate 50%-70% Loss Severity Rate 90%-95% Retail installment contracts held for sale $ 290,277 Income Approach Expected Yield 1%-2% Expected Lifetime Cumulative Net Loss 4%-6% Weighted Average Life 2 - 3 years Financial Instruments Fair Value at December 31, 2017 Valuation Technique Unobservable Inputs Range Financial Assets: Retail installment contracts held for investment $ 22,124 Discounted Cash Flow Discount Rate 8%-10% Default Rate 15%-20% Prepayment Rate 6%-8% Loss Severity Rate 50%-60% Personal loans held for sale $ 1,062,089 Lower of Market or Income Approach Market Approach Market Participant View 70%-80% Income Approach Discount Rate 15%-20% Default Rate 30%-40% Net Principal Payment Rate 50%-70% Loss Severity Rate 90%-95% Retail installment contracts held for sale $ 1,148,332 Discounted Cash Flow Discount Rate 3%-6% Default Rate 3%-4% Prepayment Rate 15%-20% Loss Severity Rate 50%-60%

Employee Benefit Plans (Tables)

Employee Benefit Plans (Tables)	6 Months Ended
	Jun. 30, 2018
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, 2018 is as follows: Shares Weighted Average Exercise Price Weighted Average Remaining Contractual Term (Years) Aggregate Intrinsic Value Options outstanding at January 1, 2018 1,695,008 $ 12.39 4.7 $ 12,058 Granted — — — — Exercised (518,893 ) 9.46 — 4,431 Expired (67,579 ) 23.63 — — Forfeited (65,398 ) 23.57 — — Options outstanding at June 30, 2018 1,043,138 12.41 3.7 7,689 Options exercisable at June 30, 2018 911,072 $ 11.25 3.4 $ 7,536
Schedule of Nonvested Restricted Stock Units and Performance Stock Units Activity	A summary of the Company’s Restricted Stock Units and performance stock units and related activity as of and for the six months ended June 30, 2018 is as follows: Shares Weighted Average Grant Date Fair Value Weighted Average Remaining Contractual Term (Years) Aggregate Intrinsic Value Outstanding as of January 1, 2018 $ 650,252 $ 12.68 1.0 $ 12,108 Granted 591,215 16.35 — — Vested (491,374 ) 14.20 — 8,038 Forfeited/canceled (22,719 ) 12.74 — — Unvested as of June 30, 2018 727,374 14.58 1.5 13,886

Shareholders' Equity (Tables)

Shareholders' Equity (Tables)	6 Months Ended
	Jun. 30, 2018
Equity [Abstract]
Summary of Changes in Accumulated Other Comprehensive Income (Loss)	A summary of changes in accumulated other comprehensive income (loss), net of tax, for the three and six months ended June 30, 2018 and 2017 is as follows: Three Months Ended Six Months Ended June 30, 2018 June 30, 2017 June 30, 2018 June 30, 2017 Beginning balance, unrealized gains (losses) on cash flow hedges $ 63,211 $ 35,504 $ 44,262 $ 28,259 Other comprehensive income (loss) before reclassifications (gross) (a) 7,015 (14,022 ) 29,934 (4,123 ) Amounts (gross) reclassified out of accumulated other comprehensive income (loss) (7,777 ) 6,378 (11,747 ) 3,724 Ending balance, unrealized gains (losses) on cash flow hedges $ 62,449 $ 27,860 $ 62,449 $ 27,860 (a) Includes impact of accumulated other comprehensive income reclassified to Retained earnings, primarily comprised of $6,149 as a result of the adoption of ASU 2018-02. Refer to Note 1 for further discussion.
Reclassification of Amounts Out of Accumulated Other Comprehensive Income (Loss)	Amounts (gross) reclassified out of accumulated other comprehensive income (loss) during the three and six months ended June 30, 2018 and 2017 consist of the following: Three Months Ended June 30, 2018 Three Months Ended June 30, 2017 Reclassification Amount reclassified Income statement line item Amount reclassified Income statement line item Cash flow hedges $ (9,095 ) Interest expense $ 8,859 Interest expense Tax expense (benefit) 1,318 (2,481 ) Net of tax $ (7,777 ) $ 6,378 Six Months Ended June 30, 2018 Six Months Ended June 30, 2017 Reclassification Amount reclassified Income statement line item Amount reclassified Income statement line item Cash flow hedges $ (13,672 ) Interest expense $ 4,619 Interest expense Tax expense (benefit) 1,925 (895 ) Net of tax $ (11,747 ) $ 3,724

Investment Losses, Net (Tables)

Investment Losses, Net (Tables)	6 Months Ended
	Jun. 30, 2018
Investments, Debt and Equity Securities [Abstract]
Schedule of Investment Losses, Net	Investment gains (losses), net was comprised of the following for the three and six months ended June 30, 2018 and 2017 : Three Months Ended Six Months Ended June 30, 2018 June 30, 2017 June 30, 2018 June 30, 2017 Gain (loss) on sale of loans and leases $ (2,096 ) $ (2,179 ) $ (18,792 ) $ (13,061 ) Lower of cost or market adjustments (79,215 ) (95,683 ) (149,714 ) (161,804 ) Other gains, (losses and impairments), net (1,323 ) (1,660 ) (648 ) (1,056 ) $ (82,634 ) $ (99,522 ) $ (169,154 ) $ (175,921 )

Description of Business, Basi40

Description of Business, Basis of Presentation, and Significant Accounting Policies and Practices (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2018USD ($)segment	Jun. 30, 2017USD ($)
Basis Of Presentation And Significant Accounting Policies [Line Items]
Number of reportable segments | segment	1
Stranded income tax effects reclassified from AOCI to retained earnings	$ 0	$ 26,552
Retained Earnings
Basis Of Presentation And Significant Accounting Policies [Line Items]
Stranded income tax effects reclassified from AOCI to retained earnings	(6,149)	$ 25,113
Accumulated Other Comprehensive Income
Basis Of Presentation And Significant Accounting Policies [Line Items]
Stranded income tax effects reclassified from AOCI to retained earnings	$ 6,149
SHUSA
Basis Of Presentation And Significant Accounting Policies [Line Items]
Ownership percentage held in the Company	68.00%
Public Shareholders
Basis Of Presentation And Significant Accounting Policies [Line Items]
Ownership percentage held in the Company	32.00%
FCA
Basis Of Presentation And Significant Accounting Policies [Line Items]
Financing contract term	10 years

Finance Receivables - Summary o

Finance Receivables - Summary of Financing Receivables Held for Investment (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]
Purchased receivables	$ 22,678	$ 27,839
Capital lease receivables	16,775	17,339
Finance receivables held for investment, net	24,096,770	22,427,769
Purchased receivables portfolios acquired with deteriorated credit quality:
Outstanding balance	35,750	43,474
Outstanding recorded investment, net of impairment	22,845	28,069
Recurring
Accounts, Notes, Loans and Financing Receivable [Line Items]
Retail installment contracts acquired individually	17,182	22,124
Retail Installment Contracts Acquired Individually
Accounts, Notes, Loans and Financing Receivable [Line Items]
Finance receivables held for investment, net	24,039,237	22,362,509
Retail Installment Contracts Acquired Individually | Non-TDR
Accounts, Notes, Loans and Financing Receivable [Line Items]
Finance receivables held for investment, net	19,630,070	17,901,026
Retail Installment Contracts Acquired Individually | Non-TDR | Unpaid principal balance
Accounts, Notes, Loans and Financing Receivable [Line Items]
Finance receivables held for investment, net	21,414,617	19,681,394
Retail Installment Contracts Acquired Individually | Non-TDR | Credit loss allowance - specific
Accounts, Notes, Loans and Financing Receivable [Line Items]
Finance receivables held for investment, net	0	0
Retail Installment Contracts Acquired Individually | Non-TDR | Credit loss allowance - collective
Accounts, Notes, Loans and Financing Receivable [Line Items]
Finance receivables held for investment, net	(1,641,214)	(1,529,815)
Retail Installment Contracts Acquired Individually | Non-TDR | Discount
Accounts, Notes, Loans and Financing Receivable [Line Items]
Finance receivables held for investment, net	(212,484)	(309,191)
Retail Installment Contracts Acquired Individually | Non-TDR | Capitalized origination costs and fees
Accounts, Notes, Loans and Financing Receivable [Line Items]
Finance receivables held for investment, net	69,151	58,638
Retail Installment Contracts Acquired Individually | TDR
Accounts, Notes, Loans and Financing Receivable [Line Items]
Finance receivables held for investment, net	4,409,167	4,461,483
Retail Installment Contracts Acquired Individually | TDR | Unpaid principal balance
Accounts, Notes, Loans and Financing Receivable [Line Items]
Finance receivables held for investment, net	5,958,564	6,261,894
Retail Installment Contracts Acquired Individually | TDR | Credit loss allowance - specific
Accounts, Notes, Loans and Financing Receivable [Line Items]
Finance receivables held for investment, net	(1,496,580)	(1,731,320)
Retail Installment Contracts Acquired Individually | TDR | Credit loss allowance - collective
Accounts, Notes, Loans and Financing Receivable [Line Items]
Finance receivables held for investment, net	0	0
Retail Installment Contracts Acquired Individually | TDR | Discount
Accounts, Notes, Loans and Financing Receivable [Line Items]
Finance receivables held for investment, net	(58,265)	(74,832)
Retail Installment Contracts Acquired Individually | TDR | Capitalized origination costs and fees
Accounts, Notes, Loans and Financing Receivable [Line Items]
Finance receivables held for investment, net	5,448	5,741
Receivables from Dealers
Accounts, Notes, Loans and Financing Receivable [Line Items]
Finance receivables held for investment, net	15,042	15,623
Receivables from Dealers | Unpaid principal balance
Accounts, Notes, Loans and Financing Receivable [Line Items]
Finance receivables held for investment, net	15,200	15,787
Receivables from Dealers | Credit loss allowance - specific
Accounts, Notes, Loans and Financing Receivable [Line Items]
Finance receivables held for investment, net	0	0
Receivables from Dealers | Credit loss allowance - collective
Accounts, Notes, Loans and Financing Receivable [Line Items]
Finance receivables held for investment, net	(158)	(164)
Receivables from Dealers | Discount
Accounts, Notes, Loans and Financing Receivable [Line Items]
Finance receivables held for investment, net	0	0
Receivables from Dealers | Capitalized origination costs and fees
Accounts, Notes, Loans and Financing Receivable [Line Items]
Finance receivables held for investment, net	0	0
Personal Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Finance receivables held for investment, net	3,038	4,459
Personal Loans | Unpaid principal balance
Accounts, Notes, Loans and Financing Receivable [Line Items]
Finance receivables held for investment, net	4,016	6,887
Personal Loans | Credit loss allowance - specific
Accounts, Notes, Loans and Financing Receivable [Line Items]
Finance receivables held for investment, net	0	0
Personal Loans | Credit loss allowance - collective
Accounts, Notes, Loans and Financing Receivable [Line Items]
Finance receivables held for investment, net	(1,116)	(2,565)
Personal Loans | Discount
Accounts, Notes, Loans and Financing Receivable [Line Items]
Finance receivables held for investment, net	0	(1)
Personal Loans | Capitalized origination costs and fees
Accounts, Notes, Loans and Financing Receivable [Line Items]
Finance receivables held for investment, net	$ 138	$ 138

Finance Receivables - Additiona

Finance Receivables - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Schedule Of Financing Receivables [Line Items]
Purchases of portfolios of finance receivables held for investment			$ 116,458	$ 152,208
Loans classified as non-performing, period for classification			60 days
Texas
Schedule Of Financing Receivables [Line Items]
Retail installment contracts held for investment (as a percent)	16.00%		16.00%
Florida
Schedule Of Financing Receivables [Line Items]
Retail installment contracts held for investment (as a percent)	12.00%		12.00%
California
Schedule Of Financing Receivables [Line Items]
Retail installment contracts held for investment (as a percent)	9.00%		9.00%
Georgia
Schedule Of Financing Receivables [Line Items]
Retail installment contracts held for investment (as a percent)	6.00%		6.00%
Other States (less than 5%)
Schedule Of Financing Receivables [Line Items]
Retail installment contracts held for investment (as a percent)	5.00%		5.00%
Virginia
Schedule Of Financing Receivables [Line Items]
Percentage of remaining receivable from dealers held for investment	63.00%		63.00%
New York
Schedule Of Financing Receivables [Line Items]
Percentage of remaining receivable from dealers held for investment	27.00%		27.00%
Missouri
Schedule Of Financing Receivables [Line Items]
Percentage of remaining receivable from dealers held for investment	10.00%		10.00%
Retail Installment Contracts
Schedule Of Financing Receivables [Line Items]
Loans classified as non-performing, period for classification			60 days
Retail Installment Contracts | Unpaid Principal Balance
Schedule Of Financing Receivables [Line Items]
Financing receivables recognized in period	$ 72,963	$ 74,405	$ 115,959	226,613
Chrysler Capital Loans
Schedule Of Financing Receivables [Line Items]
Purchases of portfolios of finance receivables held for investment			4,689,784	$ 3,389,700
Chrysler Capital Loans | Retail Installment Contracts | Automobile Loan
Schedule Of Financing Receivables [Line Items]
Financing receivable, net	7,987,546		$ 7,987,546		$ 8,234,653
Chrysler Capital Loans | Credit Concentration Risk | Accounts Receivable
Schedule Of Financing Receivables [Line Items]
Concentration risk percentage			49.00%	43.00%
Chrysler Capital Loans | Credit Concentration Risk | Accounts Receivable | Automobile Loan
Schedule Of Financing Receivables [Line Items]
Concentration risk percentage			33.00%	37.00%
Fleet Contracts
Schedule Of Financing Receivables [Line Items]
Financing receivable, net	$ 527,763		$ 527,763		$ 641,003

Finance Receivables - Changes i

Finance Receivables - Changes in Accretable Yield on Purchased Receivables Portfolios (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward]
Balance — beginning of period	$ 18,446	$ 97,946	$ 19,464	$ 107,041
Accretion of accretable yield	(2,245)	(10,303)	(5,085)	(21,447)
Reclassifications from (to) nonaccretable difference	2,167	351	3,989	2,400
Balance — end of period	$ 18,368	$ 87,994	$ 18,368	$ 87,994

Finance Receivables - Schedule

Finance Receivables - Schedule of Carrying Values of Finance Receivables Held for Sale (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]
Finance receivables held for sale, net	$ 1,246,732	$ 2,210,421
Retail installment contracts acquired individually
Accounts, Notes, Loans and Financing Receivable [Line Items]
Finance receivables held for sale, net	290,277	1,148,332
Personal loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Finance receivables held for sale, net	$ 956,455	$ 1,062,089

Finance Receivables - Schedul45

Finance Receivables - Schedule of Sales of Retail Installment Contracts and Charged-off Assets (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Receivables [Abstract]
Sales of retail installment contracts to third parties	$ 0	$ 30,000	$ 0	$ 260,568
Sale of retail installment contracts to affiliates	1,156,060	536,309	2,631,313	1,236,331
Proceeds from sales of charged-off assets to third parties	$ 16,638	$ 27,449	$ 34,875	$ 48,792

Finance Receivables - Schedul46

Finance Receivables - Schedule of Servicing of Retail Installment Contracts (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Receivables [Abstract]
Serviced balance of retail installment contracts and leases	$ 5,089,007	$ 5,771,085

Leases - Summary of Leased Vehi

Leases - Summary of Leased Vehicles (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Leases [Abstract]
Leased vehicles	$ 15,874,839	$ 14,285,769
Less: accumulated depreciation	(3,039,121)	(3,110,167)
Depreciated net capitalized cost	12,835,718	11,175,602
Manufacturer subvention payments, net of accretion	(1,152,082)	(1,042,477)
Origination fees and other costs	45,846	27,202
Net book value	$ 11,729,482	$ 10,160,327

Leases - Future Minimum Rental

Leases - Future Minimum Rental Payments Due to Lessor under Operating Leases (Details) $ in Thousands	Jun. 30, 2018USD ($)
Leases [Abstract]
Remainder of 2018	$ 1,054,424
2,019	1,658,331
2,020	978,411
2,021	164,984
2,022	3,664
Thereafter	0
Total	$ 3,859,814

Leases - Summary of Capital Lea

Leases - Summary of Capital Lease Receivables (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Leases [Abstract]
Gross investment in capital leases	$ 24,273	$ 27,234
Origination fees and other	157	124
Less unearned income	(4,073)	(4,377)
Net investment in capital leases before allowance	20,357	22,981
Less: allowance for lease losses	(3,582)	(5,642)
Net investment in capital leases	$ 16,775	$ 17,339

Leases - Future Minimum Renta50

Leases - Future Minimum Rental Receivable under Capital Leases (Details) $ in Thousands	Jun. 30, 2018USD ($)
Leases [Abstract]
Remainder of 2018	$ 4,705
2,019	6,975
2,020	5,392
2,021	3,773
2,022	2,941
Thereafter	487
Total	$ 24,273

Credit Loss Allowance and Cre51

Credit Loss Allowance and Credit Quality - Activity in Loan Loss Allowance (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Retail Installment Contracts Acquired Individually
Allowance for Loan and Lease Losses [Roll Forward]
Write-down of loans for which a bankruptcy notice was received	$ 7,000	$ 25,000	$ 14,000	$ 48,000
Retail Installment Contracts Acquired Individually | Non-TDR
Allowance for Loan and Lease Losses [Roll Forward]
Balance — beginning of period	1,586,557	1,836,730	1,529,815	1,799,760
Provision for credit losses	242,286	172,990	553,007	515,082
Charge-offs	(584,296)	(654,613)	(1,263,735)	(1,388,767)
Recoveries	396,667	405,702	822,127	834,734
Balance — end of period	1,641,214	1,760,809	1,641,214	1,760,809
Retail Installment Contracts Acquired Individually | TDR
Allowance for Loan and Lease Losses [Roll Forward]
Balance — beginning of period	1,595,465	1,604,489	1,731,320	1,611,295
Provision for credit losses	112,144	345,380	260,102	632,385
Charge-offs	(427,079)	(457,102)	(946,661)	(947,645)
Recoveries	216,050	193,392	451,819	390,124
Balance — end of period	1,496,580	1,686,159	1,496,580	1,686,159
Receivables from Dealers
Allowance for Loan and Lease Losses [Roll Forward]
Balance — beginning of period	161	734	164	724
Provision for credit losses	(3)	(21)	(6)	(11)
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Balance — end of period	158	713	158	713
Personal Loans
Allowance for Loan and Lease Losses [Roll Forward]
Balance — beginning of period	1,714	4,517	2,565	0
Provision for credit losses	(83)	1,166	(185)	9,141
Charge-offs	(695)	(1,586)	(1,763)	(5,218)
Recoveries	180	265	499	439
Balance — end of period	1,116	4,362	1,116	4,362
Finance Leases Portfolio Segment
Allowance for Loan and Lease Losses [Roll Forward]
Balance — beginning of period	5,757	6,605	5,642	9,988
Provision for credit losses	(1,769)	1,040	(1,348)	(1,029)
Charge-offs	(1,760)	(3,081)	(3,141)	(6,760)
Recoveries	1,354	1,803	2,429	4,168
Balance — end of period	$ 3,582	$ 6,367	$ 3,582	$ 6,367

Credit Loss Allowance and Cre52

Credit Loss Allowance and Credit Quality - Delinquencies, Narrative (Details) - USD ($)	6 Months Ended	12 Months Ended
	Jun. 30, 2018	Dec. 31, 2016	Dec. 31, 2017
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, nonperforming loans, period for classification	60 days
Chrysler Capital Securitization
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loan origination, required minimum payment, percentage of scheduled payment		90.00%
Third Party
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loan origination, required minimum payment, percentage of scheduled payment	90.00%	50.00%
Receivables from dealers
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, nonperforming loans, period for classification	90 days
Financing receivable, recorded investment, past due	$ 0		$ 0
Personal loans | Consumer Portfolio Segment | Unfunded Loan Commitment | Unpaid Principal Balance
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, recorded investment, 90 days past due and still accruing	117,815,000		130,034,000
Retail installment contracts held for sale
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, recorded investment, past due	$ 482,000		$ 1,701,000

Credit Loss Allowance and Cre53

Credit Loss Allowance and Credit Quality - Summary of Delinquencies (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Financing Receivable, Recorded Investment, Past Due [Line Items]
Principal, 30-59 days past due	$ 2,535,166	$ 2,827,678
Delinquent principal over 59 days	1,151,410	1,544,583
Total delinquent principal	3,686,576	4,372,261
Loans Acquired Individually
Financing Receivable, Recorded Investment, Past Due [Line Items]
Principal, 30-59 days past due	2,532,058	2,822,686
Delinquent principal over 59 days	1,149,429	1,541,728
Total delinquent principal	3,681,487	4,364,414
Purchased Receivables Portfolios
Financing Receivable, Recorded Investment, Past Due [Line Items]
Principal, 30-59 days past due	3,108	4,992
Delinquent principal over 59 days	1,981	2,855
Total delinquent principal	$ 5,089	$ 7,847

Credit Loss Allowance and Cre54

Credit Loss Allowance and Credit Quality - Retail Installment Contracts Held for Investment on Nonaccrual Status (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
TDR
Financing Receivable, Modifications [Line Items]
Total nonaccrual principal	$ 1,554,860
Retail Installment Contracts Acquired Individually, Held for Investment
Financing Receivable, Modifications [Line Items]
Total nonaccrual principal	$ 2,060,259	$ 2,057,299
Percent	7.50%	7.90%
Retail Installment Contracts Acquired Individually, Held for Investment | Non-TDR
Financing Receivable, Modifications [Line Items]
Total nonaccrual principal	$ 505,399	$ 666,926
Percent	1.80%	2.60%
Retail Installment Contracts Acquired Individually, Held for Investment | TDR
Financing Receivable, Modifications [Line Items]
Total nonaccrual principal		$ 1,390,373
Percent	5.70%	5.40%

Credit Loss Allowance and Cre55

Credit Loss Allowance and Credit Quality - Credit Risk Profile (Details) - Retail Installment Contracts Held for Investment	Jun. 30, 2018	Dec. 31, 2017
Commercial Portfolio Segment
Financing Receivable Recorded Investment [Line Items]
Financing receivable, net, percentage	1.90%	2.50%
Consumer Portfolio Segment | No-FICOs
Financing Receivable Recorded Investment [Line Items]
Financing receivable, net, percentage	11.30%	11.20%
Consumer Portfolio Segment | FICO Band Less Than 540
Financing Receivable Recorded Investment [Line Items]
Financing receivable, net, percentage	21.00%	21.80%
Consumer Portfolio Segment | FICO Band 540-599
Financing Receivable Recorded Investment [Line Items]
Financing receivable, net, percentage	32.60%	32.00%
Consumer Portfolio Segment | FICO Band 600-639
Financing Receivable Recorded Investment [Line Items]
Financing receivable, net, percentage	17.80%	17.40%
Consumer Portfolio Segment | FICO Band Greater Than 640
Financing Receivable Recorded Investment [Line Items]
Financing receivable, net, percentage	15.40%	15.10%

Credit Loss Allowance and Cre56

Credit Loss Allowance and Credit Quality - Commercial Loan Credit Quality Indicators (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Fleet Contracts
Financing Receivable Recorded Investment [Line Items]
Financing receivable, net	$ 527,763	$ 641,003
Fleet Contracts | Total (Unpaid principal balance)
Financing Receivable Recorded Investment [Line Items]
Financing receivable, net	14,673	18,315
Fleet Contracts | Pass
Financing Receivable Recorded Investment [Line Items]
Financing receivable, net	9,974	12,276
Fleet Contracts | Special Mention
Financing Receivable Recorded Investment [Line Items]
Financing receivable, net	4,265	5,324
Fleet Contracts | Substandard
Financing Receivable Recorded Investment [Line Items]
Financing receivable, net	434	715
Fleet Contracts | Doubtful
Financing Receivable Recorded Investment [Line Items]
Financing receivable, net	0	0
Fleet Contracts | Loss
Financing Receivable Recorded Investment [Line Items]
Financing receivable, net	0	0
Receivables From Dealers | Total (Unpaid principal balance)
Financing Receivable Recorded Investment [Line Items]
Financing receivable, net	15,200	15,787
Receivables From Dealers | Pass
Financing Receivable Recorded Investment [Line Items]
Financing receivable, net	15,167	14,130
Receivables From Dealers | Special Mention
Financing Receivable Recorded Investment [Line Items]
Financing receivable, net	33	1,657
Receivables From Dealers | Substandard
Financing Receivable Recorded Investment [Line Items]
Financing receivable, net	0	0
Receivables From Dealers | Doubtful
Financing Receivable Recorded Investment [Line Items]
Financing receivable, net	0	0
Receivables From Dealers | Loss
Financing Receivable Recorded Investment [Line Items]
Financing receivable, net	$ 0	$ 0

Credit Loss Allowance and Cre57

Credit Loss Allowance and Credit Quality - Troubled Debt Restructurings, Narrative (Details) - USD ($)	6 Months Ended
	Jun. 30, 2018	Dec. 31, 2017
Retail Installment Contracts Acquired Individually
Financing Receivable, Modifications [Line Items]
TDRs, deferral period (or more)	90 days
Receivables From Dealers
Financing Receivable, Modifications [Line Items]
Total TDR principal	$ 0	$ 0

Credit Loss Allowance and Cre58

Credit Loss Allowance and Credit Quality - Summary of TDRs (Details) - Retail Installment Contracts - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2018	Dec. 31, 2017
Financing Receivable, Modifications [Line Items]
Outstanding recorded investment	$ 5,932,209	$ 6,261,432
Impairment	(1,496,580)	(1,731,320)
Outstanding recorded investment, net of impairment	4,435,629	4,530,112
Collateral Dependent
Financing Receivable, Modifications [Line Items]
Outstanding recorded investment	78,300	64,700
TDR write down	$ 33,200	$ 29,200

Credit Loss Allowance and Cre59

Credit Loss Allowance and Credit Quality - Delinquent TDRs (Details) - Retail Installment Contracts - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Troubled Debt Restructuring Debtor Current Period [Line Items]
Principal, 30-59 days past due	$ 1,202,120	$ 1,332,239
Delinquent principal over 59 days	599,760	818,938
Total delinquent TDR principal	$ 1,801,880	$ 2,151,177

Credit Loss Allowance and Cre60

Credit Loss Allowance and Credit Quality - Summary of TDRs on Nonaccrual Status (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2018	Dec. 31, 2017
Financing Receivable, Modifications [Line Items]
Interest received applied on TDRs on nonaccrual status	$ 142,523	$ 56,740
TDR
Financing Receivable, Modifications [Line Items]
Total nonaccrual principal	1,554,860
TDR | TDRs Less Than 60 Days Past Due
Financing Receivable, Modifications [Line Items]
TDRs on cost recovery method	1,022,007	652,679
Retail Installment Contracts | TDR
Financing Receivable, Modifications [Line Items]
TDRs on cost recovery method	1,161,487	790,461
TDRs on cash basis accounting	393,373	599,912
Total nonaccrual principal	$ 1,554,860	$ 1,390,373

Credit Loss Allowance and Cre61

Credit Loss Allowance and Credit Quality - Average Recorded Investment and Income Recognized on TDR Loans (Details) - Retail Installment Contracts - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Financing Receivable, Modifications [Line Items]
Average outstanding recorded investment in TDRs	$ 5,978,346	$ 5,860,748	$ 6,084,560	$ 5,786,429
Interest income recognized	$ 202,788	$ 224,810	$ 443,999	$ 485,162

Credit Loss Allowance and Cre62

Credit Loss Allowance and Credit Quality - Financial Effects of TDRs (Details) - Retail Installment Contracts $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018USD ($)contract	Jun. 30, 2017USD ($)contract	Jun. 30, 2018USD ($)contract	Jun. 30, 2017USD ($)contract
Financing Receivable, Modifications [Line Items]
Outstanding recorded investment before TDR	$ 723,925	$ 773,629	$ 1,308,373	$ 1,655,328
Outstanding recorded investment after TDR	$ 725,438	$ 787,278	$ 1,308,102	$ 1,653,556
Number of contracts | contract	43,265	44,598	77,639	94,097

Credit Loss Allowance and Cre63

Credit Loss Allowance and Credit Quality - Defaults in Loan Modifications Accounted for as TDRs (Details) - Retail Installment Contracts $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018USD ($)contract	Jun. 30, 2017USD ($)contract	Jun. 30, 2018USD ($)contract	Jun. 30, 2017USD ($)contract
Financing Receivable, Modifications [Line Items]
Recorded investment in TDRs that subsequently defaulted | $	$ 144,561	$ 190,467	$ 339,826	$ 402,164
Number of contracts | contract	8,707	10,622	20,247	22,516

Debt - Schedule of Credit Facil

Debt - Schedule of Credit Facilities (Details) - USD ($)	1 Months Ended	6 Months Ended
	Jul. 31, 2018	Jun. 30, 2018	Dec. 31, 2017
Line of Credit Facility [Line Items]
Utilized Balance		$ 4,502,823,000	$ 4,848,316,000
Unsecured Debt
Line of Credit Facility [Line Items]
Utilized Balance		3,000,000,000	3,000,000,000
Total revolving credit facilities
Line of Credit Facility [Line Items]
Utilized Balance		7,625,023,000	8,598,316,000
Committed Amount		18,156,090,000	18,444,483,000
Assets Pledged		6,279,384,000	6,703,767,000
Restricted Cash Pledged		60,155,000	132,024,000
Total facilities with third parties
Line of Credit Facility [Line Items]
Utilized Balance		4,502,823,000	4,848,316,000
Committed Amount		10,406,090,000	10,694,483,000
Assets Pledged		6,150,116,000	6,703,767,000
Restricted Cash Pledged		$ 59,617,000	132,024,000
Total facilities with third parties | Securitized Notes Payable Retained by the Company
Line of Credit Facility [Line Items]
Debt term		1 year
Warehouse line, due August 2019
Line of Credit Facility [Line Items]
Utilized Balance		$ 287,484,000	2,044,843,000
Committed Amount		$ 500,000,000	$ 3,900,000,000
Effective Rate		3.56%	2.96%
Assets Pledged		$ 410,567,000	$ 2,929,890,000
Restricted Cash Pledged		24,525,000	53,639,000
Warehouse line, due Various
Line of Credit Facility [Line Items]
Utilized Balance		518,345,000	339,145,000
Committed Amount		$ 1,250,000,000	$ 1,250,000,000
Effective Rate		3.36%	2.53%
Assets Pledged		$ 780,594,000	$ 461,353,000
Restricted Cash Pledged		5,068,000	12,645,000
Warehouse line, due August 2019
Line of Credit Facility [Line Items]
Utilized Balance		1,832,943,000
Committed Amount		$ 3,900,000,000
Effective Rate		3.86%
Assets Pledged		$ 2,310,677,000
Restricted Cash Pledged		10,261,000
Warehouse line due December 2018
Line of Credit Facility [Line Items]
Utilized Balance		115,100,000	0
Committed Amount		$ 300,000,000	$ 300,000,000
Effective Rate		4.01%	1.49%
Assets Pledged		$ 181,621,000	$ 0
Restricted Cash Pledged		855,000	0
Warehouse line due October 2019
Line of Credit Facility [Line Items]
Utilized Balance		364,777,000	226,577,000
Committed Amount		$ 1,800,000,000	$ 1,800,000,000
Effective Rate		4.44%	4.95%
Assets Pledged		$ 529,183,000	$ 311,336,000
Restricted Cash Pledged		180,000	6,772,000
Repurchase facility, due on Various
Line of Credit Facility [Line Items]
Utilized Balance		179,934,000	325,775,000
Committed Amount		$ 179,934,000	$ 325,775,000
Effective Rate		3.78%	3.24%
Assets Pledged		$ 259,860,000	$ 474,188,000
Restricted Cash Pledged		17,818,000	13,842,000
Repurchase facility, due on Various | Subsequent Event
Line of Credit Facility [Line Items]
Percentage of line of credit that matured and settled	38.00%
Repurchase facility, due July 2018
Line of Credit Facility [Line Items]
Utilized Balance		92,167,000
Committed Amount		$ 92,167,000
Effective Rate		3.51%
Assets Pledged		$ 129,440,000
Restricted Cash Pledged		0
Repurchase facility, due September 2018
Line of Credit Facility [Line Items]
Utilized Balance		68,682,000
Committed Amount		$ 68,682,000
Effective Rate		3.56%
Assets Pledged		$ 92,358,000
Restricted Cash Pledged		0
Repurchase facility, due December 2018
Line of Credit Facility [Line Items]
Utilized Balance		115,307,000
Committed Amount		$ 115,307,000
Effective Rate		3.58%
Assets Pledged		$ 156,202,000
Restricted Cash Pledged		0
Warehouse line, due November 2019
Line of Credit Facility [Line Items]
Utilized Balance		417,499,000	403,999,000
Committed Amount		$ 1,000,000,000	$ 1,000,000,000
Effective Rate		3.17%	2.66%
Assets Pledged		$ 632,984,000	$ 546,782,000
Restricted Cash Pledged		8,000	14,729,000
Warehouse line, due October 2019
Line of Credit Facility [Line Items]
Utilized Balance		217,465,000	81,865,000
Committed Amount		$ 400,000,000	$ 400,000,000
Effective Rate		3.45%	4.09%
Assets Pledged		$ 328,840,000	$ 114,021,000
Restricted Cash Pledged		158,000	3,057,000
Warehouse line, due November 2019
Line of Credit Facility [Line Items]
Utilized Balance		78,620,000	435,220,000
Committed Amount		$ 500,000,000	$ 500,000,000
Effective Rate		5.06%	1.92%
Assets Pledged		$ 89,182,000	$ 521,365,000
Restricted Cash Pledged		411,000	16,866,000
Warehouse line, due October 2018
Line of Credit Facility [Line Items]
Utilized Balance		214,500,000	235,700,000
Committed Amount		$ 300,000,000	$ 300,000,000
Effective Rate		3.66%	2.84%
Assets Pledged		$ 248,608,000	$ 289,634,000
Restricted Cash Pledged		333,000	10,474,000
Warehouse line, due January 2018
Line of Credit Facility [Line Items]
Utilized Balance			336,484,000
Committed Amount			$ 500,000,000
Effective Rate			2.87%
Assets Pledged			$ 473,208,000
Restricted Cash Pledged			0
Repurchase facility due April 2018
Line of Credit Facility [Line Items]
Utilized Balance			202,311,000
Committed Amount			$ 202,311,000
Effective Rate			2.67%
Assets Pledged			$ 264,120,000
Restricted Cash Pledged			0
Repurchase facility, due March 2018
Line of Credit Facility [Line Items]
Utilized Balance			147,500,000
Committed Amount			$ 147,500,000
Effective Rate			3.91%
Assets Pledged			$ 222,108,000
Restricted Cash Pledged			0
Repurchase facility, due March 2018
Line of Credit Facility [Line Items]
Utilized Balance			68,897,000
Committed Amount			$ 68,897,000
Effective Rate			3.04%
Assets Pledged			$ 95,762,000
Restricted Cash Pledged			0
Total facilities with Santander and related subsidiaries
Line of Credit Facility [Line Items]
Utilized Balance		3,122,200,000	3,750,000,000
Committed Amount		7,750,000,000	7,750,000,000
Assets Pledged		129,268,000	0
Restricted Cash Pledged		538,000	0
Line of credit, due December 2018
Line of Credit Facility [Line Items]
Utilized Balance		0	0
Committed Amount		$ 1,000,000,000	$ 1,000,000,000
Effective Rate		3.09%	3.09%
Assets Pledged		$ 0	$ 0
Restricted Cash Pledged		0	0
Promissory Note, due December 2022
Line of Credit Facility [Line Items]
Utilized Balance		250,000,000	250,000,000
Committed Amount		$ 250,000,000	$ 250,000,000
Effective Rate		3.95%	3.95%
Assets Pledged		$ 0	$ 0
Restricted Cash Pledged		0	0
Promissory Note, due December 2021
Line of Credit Facility [Line Items]
Utilized Balance		250,000,000	250,000,000
Committed Amount		$ 250,000,000	$ 250,000,000
Effective Rate		3.70%	3.70%
Assets Pledged		$ 0	$ 0
Restricted Cash Pledged		0	0
Promissory Note, due March 2019
Line of Credit Facility [Line Items]
Utilized Balance		300,000,000	300,000,000
Committed Amount		$ 300,000,000	$ 300,000,000
Effective Rate		3.38%	2.67%
Assets Pledged		$ 0	$ 0
Restricted Cash Pledged		0	0
Promissory Note, due October 2020
Line of Credit Facility [Line Items]
Utilized Balance		400,000,000	400,000,000
Committed Amount		$ 400,000,000	$ 400,000,000
Effective Rate		3.10%	3.10%
Assets Pledged		$ 0	$ 0
Restricted Cash Pledged		0	0
Promissory Note, due May 2020
Line of Credit Facility [Line Items]
Utilized Balance		500,000,000	500,000,000
Committed Amount		$ 500,000,000	$ 500,000,000
Effective Rate		3.49%	3.49%
Assets Pledged		$ 0	$ 0
Restricted Cash Pledged		0	0
Promissory Note, due March 2022
Line of Credit Facility [Line Items]
Utilized Balance		650,000,000	650,000,000
Committed Amount		$ 650,000,000	$ 650,000,000
Effective Rate		4.20%	4.20%
Assets Pledged		$ 0	$ 0
Restricted Cash Pledged		0	0
Fair value hedge adjustment		3,763,000	4,223,000
Promissory Note, due August 2021
Line of Credit Facility [Line Items]
Utilized Balance		650,000,000	650,000,000
Committed Amount		$ 650,000,000	$ 650,000,000
Effective Rate		3.44%	3.44%
Assets Pledged		$ 0	$ 0
Restricted Cash Pledged		0	0
Line of credit, due December 2018
Line of Credit Facility [Line Items]
Utilized Balance		122,200,000	750,000,000
Committed Amount		$ 750,000,000	$ 750,000,000
Effective Rate		4.60%	1.33%
Assets Pledged		$ 129,268,000	$ 0
Restricted Cash Pledged		538,000	0
Line of credit, due March 2019
Line of Credit Facility [Line Items]
Utilized Balance		0	0
Committed Amount		$ 3,000,000,000	$ 3,000,000,000
Effective Rate		3.94%	3.94%
Assets Pledged		$ 0	$ 0
Restricted Cash Pledged		$ 0	$ 0

Debt - Lines of Credit (Details

Debt - Lines of Credit (Details) - USD ($)	Jul. 31, 2018	Jun. 30, 2018	Dec. 31, 2017
Line of Credit Facility [Line Items]
Line of credit		$ 4,502,823,000	$ 4,848,316,000
Total facilities with Santander and related subsidiaries
Line of Credit Facility [Line Items]
Committed amount		1,750,000,000
Total facilities with Santander and related subsidiaries | Retained residuals
Line of Credit Facility [Line Items]
Committed amount		1,000,000,000
Total facilities with Santander and related subsidiaries | Retained residuals | Subsequent Event
Line of Credit Facility [Line Items]
Committed amount	$ 500,000,000
Total facilities with Santander and related subsidiaries | Prime retail installment loans
Line of Credit Facility [Line Items]
Committed amount		750,000,000
Unsecured Debt
Line of Credit Facility [Line Items]
Line of credit		$ 3,000,000,000	$ 3,000,000,000

Debt - Promissory Notes (Detail

Debt - Promissory Notes (Details) - USD ($)	Jun. 30, 2018	Dec. 31, 2017
Total facilities with Santander and related subsidiaries
Debt Instrument [Line Items]
Committed amount	$ 1,750,000,000
Revolving credit facilities
Debt Instrument [Line Items]
Committed amount	18,156,090,000	$ 18,444,483,000
Secured debt | Revolving credit facilities | Total facilities with Santander and related subsidiaries
Debt Instrument [Line Items]
Committed amount	$ 3,000,000,000

Debt - Summary of Secured Struc

Debt - Summary of Secured Structured Financings (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Balance	$ 24,300,820	$ 22,557,895
Secured Structured Financings
Debt Instrument [Line Items]
Balance	24,300,820	22,557,895
Initial Note Amounts Issued	52,821,071	49,078,924
Collateral	30,829,806	29,106,279
Restricted Cash	1,615,267	1,847,759
Secured Structured Financings | Public securitizations
Debt Instrument [Line Items]
Balance	18,596,190	14,993,258
Initial Note Amounts Issued	39,882,682	36,800,642
Collateral	23,831,801	19,873,621
Restricted Cash	1,588,592	1,470,459
Secured Structured Financings | 2013 Securitization
Debt Instrument [Line Items]
Balance		418,806
Initial Note Amounts Issued		4,239,700
Collateral		544,948
Restricted Cash		$ 125,696
Secured Structured Financings | 2013 Securitization | Minimum
Debt Instrument [Line Items]
Initial Weighted Average Interest Rate		0.89%
Secured Structured Financings | 2013 Securitization | Maximum
Debt Instrument [Line Items]
Initial Weighted Average Interest Rate		1.59%
Secured Structured Financings | 2014 Securitizations
Debt Instrument [Line Items]
Balance	830,449	$ 1,150,422
Initial Note Amounts Issued	6,391,020	6,391,020
Collateral	995,784	1,362,814
Restricted Cash	$ 204,967	$ 210,937
Secured Structured Financings | 2014 Securitizations | Minimum
Debt Instrument [Line Items]
Initial Weighted Average Interest Rate	1.16%	1.16%
Secured Structured Financings | 2014 Securitizations | Maximum
Debt Instrument [Line Items]
Initial Weighted Average Interest Rate	1.72%	1.72%
Secured Structured Financings | 2015 Securitizations
Debt Instrument [Line Items]
Balance	$ 2,075,021	$ 2,484,051
Initial Note Amounts Issued	9,054,732	9,171,332
Collateral	2,634,724	3,465,671
Restricted Cash	$ 343,060	$ 366,062
Secured Structured Financings | 2015 Securitizations | Minimum
Debt Instrument [Line Items]
Initial Weighted Average Interest Rate	1.33%	1.33%
Secured Structured Financings | 2015 Securitizations | Maximum
Debt Instrument [Line Items]
Initial Weighted Average Interest Rate	2.29%	2.29%
Secured Structured Financings | 2016 Securitizations
Debt Instrument [Line Items]
Balance	$ 2,694,694	$ 3,596,822
Initial Note Amounts Issued	7,462,790	7,462,790
Collateral	3,723,193	4,798,807
Restricted Cash	$ 321,888	$ 344,899
Secured Structured Financings | 2016 Securitizations | Minimum
Debt Instrument [Line Items]
Initial Weighted Average Interest Rate	1.63%	1.63%
Secured Structured Financings | 2016 Securitizations | Maximum
Debt Instrument [Line Items]
Initial Weighted Average Interest Rate	2.80%	2.80%
Secured Structured Financings | 2017 Securitizations
Debt Instrument [Line Items]
Balance	$ 5,646,607	$ 7,343,157
Initial Note Amounts Issued	9,296,570	9,535,800
Collateral	7,666,331	9,701,381
Restricted Cash	$ 419,569	$ 422,865
Secured Structured Financings | 2017 Securitizations | Minimum
Debt Instrument [Line Items]
Initial Weighted Average Interest Rate	1.35%	2.01%
Secured Structured Financings | 2017 Securitizations | Maximum
Debt Instrument [Line Items]
Initial Weighted Average Interest Rate	2.52%	2.52%
Secured Structured Financings | 2018 Securitizations
Debt Instrument [Line Items]
Balance	$ 7,349,419
Initial Note Amounts Issued	7,677,570
Collateral	8,811,769
Restricted Cash	$ 299,108
Secured Structured Financings | 2018 Securitizations | Minimum
Debt Instrument [Line Items]
Initial Weighted Average Interest Rate	2.41%
Secured Structured Financings | 2018 Securitizations | Maximum
Debt Instrument [Line Items]
Initial Weighted Average Interest Rate	3.53%
Secured Structured Financings | Privately issued amortizing notes
Debt Instrument [Line Items]
Balance	$ 5,704,630	$ 7,564,637
Initial Note Amounts Issued	12,938,389	12,278,282
Collateral	6,998,005	9,232,658
Restricted Cash	26,675	377,300
Secured Structured Financings | 2011 Private issuance
Debt Instrument [Line Items]
Balance	153,881	281,946
Initial Note Amounts Issued	$ 1,700,000	$ 1,700,000
Initial Weighted Average Interest Rate	1.46%	1.46%
Collateral	$ 277,894	$ 398,051
Restricted Cash	102	20,356
Secured Structured Financings | 2013 Private issuances
Debt Instrument [Line Items]
Balance	1,391,968	2,292,279
Initial Note Amounts Issued	2,044,054	2,044,054
Collateral	2,558,503	3,719,148
Restricted Cash	$ 5,383	$ 155,066
Secured Structured Financings | 2013 Private issuances | Minimum
Debt Instrument [Line Items]
Initial Weighted Average Interest Rate	1.28%	1.28%
Secured Structured Financings | 2013 Private issuances | Maximum
Debt Instrument [Line Items]
Initial Weighted Average Interest Rate	1.38%	1.38%
Secured Structured Financings | 2014 Private issuances
Debt Instrument [Line Items]
Balance	$ 52,955	$ 117,730
Initial Note Amounts Issued	1,239,271	1,538,087
Collateral	136,946	231,997
Restricted Cash	$ 6,649	$ 9,552
Secured Structured Financings | 2014 Private issuances | Minimum
Debt Instrument [Line Items]
Initial Weighted Average Interest Rate	1.10%	1.05%
Secured Structured Financings | 2014 Private issuances | Maximum
Debt Instrument [Line Items]
Initial Weighted Average Interest Rate	1.40%	1.40%
Secured Structured Financings | 2015 Private issuances
Debt Instrument [Line Items]
Balance	$ 1,413,139	$ 2,009,627
Initial Note Amounts Issued	2,305,062	2,305,062
Collateral	460,556	988,247
Restricted Cash	$ 2,986	$ 55,451
Secured Structured Financings | 2015 Private issuances | Minimum
Debt Instrument [Line Items]
Initial Weighted Average Interest Rate	0.88%	0.88%
Secured Structured Financings | 2015 Private issuances | Maximum
Debt Instrument [Line Items]
Initial Weighted Average Interest Rate	2.80%	4.09%
Secured Structured Financings | 2016 Private issuances
Debt Instrument [Line Items]
Balance	$ 892,712	$ 1,489,464
Initial Note Amounts Issued	3,050,000	3,050,000
Collateral	1,410,208	2,147,988
Restricted Cash	$ 3,113	$ 89,460
Secured Structured Financings | 2016 Private issuances | Minimum
Debt Instrument [Line Items]
Initial Weighted Average Interest Rate	1.55%	1.55%
Secured Structured Financings | 2016 Private issuances | Maximum
Debt Instrument [Line Items]
Initial Weighted Average Interest Rate	2.86%	2.86%
Secured Structured Financings | 2017 Private issuances
Debt Instrument [Line Items]
Balance	$ 991,766	$ 1,373,591
Initial Note Amounts Issued	1,600,000	1,641,079
Collateral	1,215,294	1,747,227
Restricted Cash	$ 5,992	$ 47,415
Secured Structured Financings | 2017 Private issuances | Minimum
Debt Instrument [Line Items]
Initial Weighted Average Interest Rate	1.85%	1.85%
Secured Structured Financings | 2017 Private issuances | Maximum
Debt Instrument [Line Items]
Initial Weighted Average Interest Rate	2.44%	2.27%
Secured Structured Financings | 2018 Private issuance
Debt Instrument [Line Items]
Balance	$ 808,209
Initial Note Amounts Issued	1,000,002
Collateral	938,604
Restricted Cash	$ 2,450
Secured Structured Financings | 2018 Private issuance | Minimum
Debt Instrument [Line Items]
Initial Weighted Average Interest Rate	2.42%
Secured Structured Financings | 2018 Private issuance | Maximum
Debt Instrument [Line Items]
Initial Weighted Average Interest Rate	2.89%

Debt - Secured Structured Finan

Debt - Secured Structured Financings, Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Debt Disclosure [Abstract]
Private issuance notes secured with vehicle lease	$ 6,016,507		$ 6,016,507		$ 3,710,377
Amortized debt issuance costs	8,580	$ 8,377	16,500	$ 17,106
Interest expense on secured structured financing	$ 172,916	$ 132,953	$ 323,591	$ 257,018

Variable Interest Entities - Ad

Variable Interest Entities - Additional Information (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Securitization Financial Asset For Which Transfer Is Accounted As Sale [Line Items]
Gross retail installment contracts transferred and serviced	$ 26,330,533,000		$ 26,330,533,000		$ 26,250,482,000
Receivables securitized	6,511,953,000	$ 4,750,103,000	13,752,897,000	$ 12,396,728,000
VIE, Not Primary Beneficiary
Securitization Financial Asset For Which Transfer Is Accounted As Sale [Line Items]
Gross retail installment contracts transferred and serviced	4,927,722,000		4,927,722,000		$ 3,428,248,000
Receivables securitized	1,156,060,000	536,309,000	2,631,313,000	1,236,331,000
Loss on retail installment contracts	(3,177,000)	$ (3,461,000)	(20,080,000)	$ (6,180,000)
Maximum exposure to loss, involvement with the VIE	$ 0		$ 0

Variable Interest Entities - Su

Variable Interest Entities - Summary of Cash Flows Received from Securitization Trusts (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Variable Interest Entity [Line Items]
Assets securitized	$ 6,511,953	$ 4,750,103	$ 13,752,897	$ 12,396,728
Net proceeds from new securitizations	4,581,874	3,485,091	8,058,196	9,061,892
Net proceeds from sale of retained bonds	382,022	157,763	593,632	273,733
Cash received for servicing fees	213,900	215,994	429,690	424,917
Net distributions from Trusts	780,834	729,557	1,325,986	1,407,786
Total cash received from Trusts	5,958,630	4,588,405	10,407,504	11,168,328
VIE, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Assets securitized	1,156,060	536,309	2,631,313	1,236,331
Net proceeds from new securitizations	1,160,119	538,478	2,634,939	1,240,797
Cash received for servicing fees	12,616	11,970	20,694	13,368
Total cash received from Trusts	$ 1,172,735	$ 550,448	$ 2,655,633	$ 1,254,165

Variable Interest Entities - Of

Variable Interest Entities - Off-balance Sheet Variable Interest Entities Portfolio (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Variable Interest Entity [Line Items]
Total serviced for others portfolio	$ 26,330,533	$ 26,250,482
VIE, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Total serviced for others portfolio	4,927,722	3,428,248
VIE, Not Primary Beneficiary | Chrysler Capital securitizations
Variable Interest Entity [Line Items]
Total serviced for others portfolio	960,057	1,404,232
VIE, Not Primary Beneficiary | Third parties
Variable Interest Entity [Line Items]
Total serviced for others portfolio	960,057	1,404,232
VIE, Not Primary Beneficiary | Santander
Variable Interest Entity [Line Items]
Total serviced for others portfolio	$ 3,967,665	$ 2,024,016

Derivative Financial Instrume72

Derivative Financial Instruments - Additional Information (Details) - USD ($)	Jun. 30, 2018	Dec. 31, 2017
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Estimated unrealized gains to be reclassified from AOCI to interest expense in next 12 months	$ 41,548,000
Warrant
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Estimated fair value of warrant	$ 0	$ 0

Derivative Financial Instrume73

Derivative Financial Instruments - Summary of Underlying Notional Amounts and Aggregate Fair Values (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Derivative [Line Items]
Asset	$ 292,639	$ 223,577
Liability	(199,131)	(167,933)
Interest rate swaps | Not Designated As Hedges
Derivative [Line Items]
Notional	2,613,800	1,736,400
Fair Value	19,596	9,596
Asset	19,596	9,596
Liability	0	0
Interest rate swaps | Cash Flow Hedging | Designated as Hedges
Derivative [Line Items]
Notional	4,197,700	4,926,900
Fair Value	74,110	45,986
Asset	74,110	45,986
Liability	0	0
Interest rate cap agreements
Derivative [Line Items]
Notional	9,207,853	10,906,081
Fair Value	198,933	103,721
Asset	198,933	135,830
Liability	0	(32,109)
Options for interest rate cap agreements
Derivative [Line Items]
Notional	9,207,853	10,906,081
Fair Value	(199,131)	(103,659)
Asset	0	32,165
Liability	$ (199,131)	$ (135,824)

Derivative Financial Instrume74

Derivative Financial Instruments - Offsetting of Derivative Assets and Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Offsetting of Financial Assets
Assets Presented in the Condensed Consolidated Balance Sheet, Total derivatives subject to a master netting arrangement or similar arrangement	$ 292,639	$ 223,577
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheet, Cash Collateral Received, Total derivative assets	(155,192)	(71,984)
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheet, Net Amount, Total derivatives subject to a master netting arrangement or similar arrangement	137,447	151,593
Total derivatives not subject to a master netting arrangement or similar arrangement	0	0
Assets Presented in the Condensed Consolidated Balance Sheet, Total derivative assets	292,639	223,577
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheet, Net Amount, Total derivative assets	137,447	151,593
Assets Presented in the Condensed Consolidated Balance Sheet, Total financial assets	292,639	223,577
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheet, Cash Collateral Received, Total financial assets	(155,192)	(71,984)
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheet, Net Amount, Total financial assets	137,447	151,593
Offsetting of Financial Liabilities
Liabilities Presented in the Condensed Consolidated Balance Sheet, Total derivatives subject to a master netting arrangement or similar arrangement	199,131	167,933
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheet, Cash Collateral Received, Total derivative liabilities	(199,131)	(151,741)
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheet, Net Amount, Total derivatives subject to a master netting arrangement or similar arrangement	0	16,192
Total derivatives not subject to a master netting arrangement or similar arrangement	0	0
Liabilities Presented in the Condensed Consolidated Balance Sheet, Total derivative liabilities	199,131	167,933
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheet, Net Amount, Total derivative liabilities	0	16,192
Liabilities Presented in the Condensed Consolidated Balance Sheet, Total financial liabilities	199,131	167,933
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheet, Cash Collateral Pledged, Total financial liabilities	(199,131)	(151,741)
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheet, Net Amount, Total financial liabilities	0	16,192
Interest rate swaps | Santander and Affiliates
Offsetting of Financial Assets
Assets Presented in the Condensed Consolidated Balance Sheet, Total derivatives subject to a master netting arrangement or similar arrangement		8,621
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheet, Cash Collateral Received, Total derivative assets		(3,461)
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheet, Net Amount, Total derivatives subject to a master netting arrangement or similar arrangement		5,160
Interest rate swaps | Third Party
Offsetting of Financial Assets
Assets Presented in the Condensed Consolidated Balance Sheet, Total derivatives subject to a master netting arrangement or similar arrangement	93,706	46,961
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheet, Cash Collateral Received, Total derivative assets	(61,355)	(448)
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheet, Net Amount, Total derivatives subject to a master netting arrangement or similar arrangement	32,351	46,513
Interest rate caps
Offsetting of Financial Assets
Assets Presented in the Condensed Consolidated Balance Sheet, Total derivative assets	198,933	135,830
Offsetting of Financial Liabilities
Liabilities Presented in the Condensed Consolidated Balance Sheet, Total derivative liabilities	0	32,109
Interest rate caps | Santander and Affiliates
Offsetting of Financial Assets
Assets Presented in the Condensed Consolidated Balance Sheet, Total derivatives subject to a master netting arrangement or similar arrangement	14,111	18,201
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheet, Cash Collateral Received, Total derivative assets	(12,240)	(12,240)
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheet, Net Amount, Total derivatives subject to a master netting arrangement or similar arrangement	1,871	5,961
Interest rate caps | Third Party
Offsetting of Financial Assets
Assets Presented in the Condensed Consolidated Balance Sheet, Total derivatives subject to a master netting arrangement or similar arrangement	184,822	149,794
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheet, Cash Collateral Received, Total derivative assets	(81,597)	(55,835)
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheet, Net Amount, Total derivatives subject to a master netting arrangement or similar arrangement	103,225	93,959
Back to back | Santander and Affiliates
Offsetting of Financial Liabilities
Liabilities Presented in the Condensed Consolidated Balance Sheet, Total derivatives subject to a master netting arrangement or similar arrangement	14,111	18,201
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheet, Cash Collateral Received, Total derivative liabilities	(14,111)	(18,201)
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheet, Net Amount, Total derivatives subject to a master netting arrangement or similar arrangement	0	0
Back to back | Third Party
Offsetting of Financial Liabilities
Liabilities Presented in the Condensed Consolidated Balance Sheet, Total derivatives subject to a master netting arrangement or similar arrangement	185,020	149,732
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheet, Cash Collateral Received, Total derivative liabilities	(185,020)	(133,540)
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheet, Net Amount, Total derivatives subject to a master netting arrangement or similar arrangement	$ 0	$ 16,192

Derivative Financial Instrume75

Derivative Financial Instruments - Gross Gains (Losses) Reclassified from Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Designated as Hedges | Interest Rate Swaps
Derivative Instruments Gain Loss [Line Items]
Recognized in Earnings	$ 0	$ 8,663	$ 0	$ 8,280
Gross Gains Recognized in Accumulated Other Comprehensive Income (Loss)	8,412	(2,217)	34,841	5,115
Gross Gains (Losses) Reclassified From Accumulated Other Comprehensive Income to Interest Expense	9,095	(8,859)	13,672	(4,619)
Designated as Hedges | Interest Rate Swaps | Cash Flow Hedging
Derivative Instruments Gain Loss [Line Items]
Recognized in Earnings	0	9,895	0	9,512
Gross Gains Recognized in Accumulated Other Comprehensive Income (Loss)	8,412	(2,217)	34,841	5,115
Gross Gains (Losses) Reclassified From Accumulated Other Comprehensive Income to Interest Expense	9,095	(8,859)	13,672	(4,619)
Designated as Hedges | Interest Rate Swaps | Fair Value Hedging
Derivative Instruments Gain Loss [Line Items]
Recognized in Earnings		(1,232)		(1,232)
Gross Gains Recognized in Accumulated Other Comprehensive Income (Loss)		0		0
Gross Gains (Losses) Reclassified From Accumulated Other Comprehensive Income to Interest Expense		0		0
Not Designated As Hedges | Interest Expense
Derivative Instruments Gain Loss [Line Items]
Recognized in Earnings	$ (22)		$ (9,739)
Not Designated As Hedges | Operating Expense
Derivative Instruments Gain Loss [Line Items]
Recognized in Earnings		$ (272)		$ 426

Other Assets (Details)

Other Assets (Details) - USD ($) $ in Thousands	1 Months Ended
	May 31, 2013	Jun. 30, 2018	Dec. 31, 2017
Other Assets [Line Items]
Other assets		$ 1,062,240	$ 913,244
Upfront fee	$ 150,000
Finance and other interest income amortization period	10 years
Vehicles
Other Assets [Line Items]
Other assets		254,086	293,546
Manufacturer subvention payments receivable
Other Assets [Line Items]
Other assets		163,775	83,910
Upfront fee
Other Assets [Line Items]
Other assets		72,500	80,000
Derivative assets at fair value
Other Assets [Line Items]
Other assets		278,528	196,755
Derivative - third party collateral
Other Assets [Line Items]
Other assets		190,609	149,805
Prepaids
Other Assets [Line Items]
Other assets		30,459	40,830
Accounts receivable
Other Assets [Line Items]
Other assets		26,459	38,583
Other
Other Assets [Line Items]
Other assets		$ 45,824	$ 29,815

Income Taxes (Details)

Income Taxes (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Income tax expense	$ 114,004,000	$ 83,433,000	$ 171,315,000	$ 161,434,000
Effective tax rate	25.40%	24.00%	22.90%	28.30%
Earnings that are considered indefinitely reinvested	$ 0		$ 0		$ 0
Operating Loss Carryforwards [Line Items]
Stranded income tax effects reclassified from AOCI to retained earnings			0	$ 26,552,000
Related party taxes receivable	467,000		467,000		467,000
Retained Earnings
Operating Loss Carryforwards [Line Items]
Stranded income tax effects reclassified from AOCI to retained earnings			(6,149,000)	$ 25,113,000
Accumulated Other Comprehensive Income
Operating Loss Carryforwards [Line Items]
Stranded income tax effects reclassified from AOCI to retained earnings			6,149,000
Tax Sharing Agreement
Operating Loss Carryforwards [Line Items]
Related party taxes receivable	$ 467,000		$ 467,000		$ 467,000

Commitments and Contingencies -

Commitments and Contingencies - Liabilities for Commitments and Contingencies (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Consumer arrangements
Loss Contingencies [Line Items]
Contingencies	$ 14,339	$ 6,326
Legal and regulatory proceedings
Loss Contingencies [Line Items]
Contingencies	112,500	108,800
Revenue-sharing and gain-sharing payments | Chrysler
Loss Contingencies [Line Items]
Commitments	11,053	6,580
Servicer performance fee | Bank of America
Loss Contingencies [Line Items]
Commitments	6,996	8,072
Loss-sharing payments | CBP
Loss Contingencies [Line Items]
Commitments	$ 4,977	$ 5,625

Commitments and Contingencies79

Commitments and Contingencies - Chrysler Agreement (Details) - Chrysler - USD ($)	6 Months Ended
	Jun. 30, 2018	Dec. 31, 2017
Other Commitments [Line Items]
Funding available for FCA retail financing	$ 4,500,000,000
Meeting specified escalating penetration rates, period	5 years
Minimum
Other Commitments [Line Items]
Funding available for dealer inventory financing	$ 5,000,000,000
Revenue-sharing and gain-sharing payments
Other Commitments [Line Items]
Amount accrued for the payments	$ 11,053,000	$ 6,580,000

Commitments and Contingencies80

Commitments and Contingencies - Agreement with Bank of America (Details) - Bank of America - USD ($)	Jan. 31, 2017	Jun. 30, 2018	Dec. 31, 2017
Other Commitments [Line Items]
Commitment to sell loans	$ 300,000,000
Servicer performance payments due, period	6 years
Servicer performance fee
Other Commitments [Line Items]
Commitments		$ 6,996,000	$ 8,072,000

Commitments and Contingencies81

Commitments and Contingencies - Agreement with CBP (Details) - CBP - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Dec. 31, 2017
Other Commitments [Line Items]
Loans servicing, loss-sharing payment percentage	0.50%
Loss-sharing payments
Other Commitments [Line Items]
Commitments	$ 4,977	$ 5,625

Commitments and Contingencies82

Commitments and Contingencies - Other Contingencies (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Consumer arrangements
Other Commitments [Line Items]
Accrual for miscellaneous contingencies	$ 14,339	$ 6,326

Commitments and Contingencies83

Commitments and Contingencies - Legal and Regulatory Proceedings (Details) $ in Thousands	Jan. 03, 2018claim	Feb. 28, 2015USD ($)	Jul. 31, 2018USD ($)	Jun. 30, 2018USD ($)	Dec. 31, 2017USD ($)
Parmelee Lawsuit
Loss Contingencies [Line Items]
Number of claims dismissed | claim	2
Parmelee Lawsuit | Subsequent Event
Loss Contingencies [Line Items]
Maximum possible loss			$ 9,500
Violation of SCRA
Loss Contingencies [Line Items]
SCRA compliance monitoring period		5 years
Aggregate Legal and Regulatory Liabilities
Loss Contingencies [Line Items]
Contingencies				$ 112,500	$ 108,800
Maximum possible loss				$ 207,000
Civil Fine | Violation of SCRA
Loss Contingencies [Line Items]
Civil fine, amount		$ 55
Civil Fine to Affected Service Members | Violation of SCRA | Minimum
Loss Contingencies [Line Items]
Civil fine, amount		9,360
Lost Equity for Each Repossession by SCUSA | Violation of SCRA
Loss Contingencies [Line Items]
Civil fine, amount		10
SCUSA Sought to Collect Repossession-related Fees | Violation of SCRA
Loss Contingencies [Line Items]
Civil fine, amount		$ 5

Commitments and Contingencies84

Commitments and Contingencies - Agreements (Details) - USD ($)	1 Months Ended	3 Months Ended		6 Months Ended		12 Months Ended
	Nov. 30, 2015	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017	Dec. 31, 2015	Dec. 31, 2016	May 31, 2015	Jun. 30, 2014
Other Commitments [Line Items]
Purchase obligation		$ 15,667,000		$ 15,667,000		$ 11,539,000
Purchase commitment, repurchase rate (up to)							9.99%
Retainer rate (up to) upon exercise of repurchase right							20.00%
Servicing fees adjustment		0	$ 0	0	$ 0
Repurchase requests outstanding		0		0
Commitment to sell charged off loan receivables in bankruptcy sale	$ 350,000
Sales subject to market price check	$ 275,000
Remaining aggregate commitment to sell charged off loan receivables		78,466,000		78,466,000		98,858,000
SBNA
Other Commitments [Line Items]
Indemnification of leases									$ 48,226,000
Credit loss indemnification of leases		0		0		18,000				$ 48,226,000
Indemnification liability		1,481,000		1,481,000		2,206,000
Bluestem | Purchase New Advances on Personal Revolving Finance Receivable
Other Commitments [Line Items]
Commitments		$ 3,800,000,000		3,800,000,000		3,900,000,000		$ 4,000,000,000
Purchases of receivables				500,000,000		1,200,000,000
Bluestem | Purchase of Receivables Related to New Opened Customer Accounts
Other Commitments [Line Items]
Purchases of receivables				$ 83,842,000		$ 263,831,000

Commitments and Contingencies85

Commitments and Contingencies - Leases (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Commitments and Contingencies Disclosure [Abstract]
Lease expense	$ 2,531	$ 2,728	$ 5,090	$ 5,467

Commitments and Contingencies86

Commitments and Contingencies - Future Minimum Lease Commitments (Details) $ in Thousands	Jun. 30, 2018USD ($)
Years ended December 31,
2,018	$ 6,260
2,019	12,817
2,020	13,080
2,021	12,940
2,022	12,282
Thereafter	44,663
Total	$ 102,042

Related-Party Transactions - In

Related-Party Transactions - Interest Expense and Accrued Interest (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Santander
Related Party Transaction [Line Items]
Interest expense for affiliate lines/letters of credit	$ 5,741	$ 15,490	$ 10,108	$ 38,466
Accrued interest for affiliate lines/letters of credit	1,787		1,787		$ 1,435
SHUSA
Related Party Transaction [Line Items]
Interest expense for affiliate lines/letters of credit	36,561	$ 20,261	72,407	$ 32,894
Accrued interest for affiliate lines/letters of credit	$ 18,225		$ 18,225		$ 18,670

Related-Party Transactions - Cr

Related-Party Transactions - Credit Facilities (Details) - Santander - USD ($) $ in Thousands	1 Months Ended	3 Months Ended		6 Months Ended
	Aug. 31, 2015	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Related Party Transaction [Line Items]
Guarantee fee, basis spread (as a percent)	12.50%
Guarantee fee expense		$ 1,569	$ 1,370	$ 3,617	$ 2,948
Guarantee fee payable		$ 11,216		$ 11,216		$ 7,598

Related-Party Transactions - De

Related-Party Transactions - Derivatives (Details) - Santander and Affiliates - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Related Party Transaction [Line Items]
Outstanding notional amount	$ 1,311,693		$ 1,311,693		$ 3,734,400
Collateral coverage on derivative liabilities	3,060		3,060		$ 1,622
Interest and mark-to-market adjustments	$ (231)	$ 245	$ (460)	$ 216

Related-Party Transactions - Le

Related-Party Transactions - Lease Origination and Servicing Agreement (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017	Jun. 30, 2014
Related Party Transaction [Line Items]
Servicing fee income	$ 27,538,000	$ 31,953,000	$ 53,720,000	$ 63,637,000
SBNA
Related Party Transaction [Line Items]
Servicing fee income	567,000	1,656,000	1,348,000	3,049,000
Credit loss indemnification of leases	0		0		$ 18,000	$ 48,226,000
Indemnification expense	0	$ 0	(722,000)	$ 0
Balance of collateral on lease origination	1,483,000		1,483,000		2,210,000
Indemnification liability	$ 1,481,000		$ 1,481,000		$ 2,206,000

Related-Party Transactions - 91

Related-Party Transactions - Information on Consumer Vehicle Lease Portfolio (Details) - SBNA - Consumer Vehicle Lease - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Related Party Transaction [Line Items]
Total serviced portfolio	$ 7,042	$ 321,629
Origination and servicing fees receivable	113	2,067
Revenue share reimbursement receivable	$ 1,042	$ 1,548

Related-Party Transactions - Re

Related-Party Transactions - Retail Installment Contracts and RV Marine (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Related Party Transaction [Line Items]
Servicing fee income	$ 27,538	$ 31,953	$ 53,720	$ 63,637
SBNA
Related Party Transaction [Line Items]
Servicing fee income	567	1,656	1,348	3,049
SBNA | Serviced Auto Loan and Retail Installment
Related Party Transaction [Line Items]
Servicing fee income	$ 756	$ 845	$ 1,795	$ 1,770

Related-Party Transactions - 93

Related-Party Transactions - Information on Serviced Auto Loan and Retail Installment Contract Portfolio (Details) - SBNA - Serviced Auto Loan and Retail Installment - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Related Party Transaction [Line Items]
Total serviced portfolio	$ 447,228	$ 522,219
Cash collections due to owner	13,478	12,306
Servicing fees receivable	$ 845	$ 943

Related-Party Transactions - 94

Related-Party Transactions - Dealer Lending (Details) - SBNA - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Related Party Transaction [Line Items]
Referral fee			$ 9,000,000
Referral fee, amortization period			10 years
Unamortized fee balance	$ 4,500,000		$ 4,500,000		$ 4,950,000
Income related to referral fee	225,000	$ 450,000	225,000	$ 450,000
Dealer Loan Portfolio
Related Party Transaction [Line Items]
Due from related parties	0		0		0
Loan Origination on Sales of Floorplan Inventory
Related Party Transaction [Line Items]
Due to related parties	$ 6,866,000		$ 6,866,000		$ 4,481,000

Related-Party Transactions - 95

Related-Party Transactions - Information on Transactions with SBNA (Details) - SBNA - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Related Party Transaction [Line Items]
Servicing fees payable	$ 9		$ 9		$ 9
Origination and Renewal Fees
Related Party Transaction [Line Items]
Revenue from related parties	1,232	$ 640	2,072	$ 1,546
Due from related parties	608		608		$ 369
Servicing Fees Expenses
Related Party Transaction [Line Items]
Expenses from transaction with related party	$ 20	$ 26	$ 39	$ 56

Related-Party Transactions - Or

Related-Party Transactions - Origination Support Services (Details) - Affiliates - SBNA - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Purchase of Retail Installment Contracts
Related Party Transaction [Line Items]
Additions to servicing asset	$ 29,000		$ 53,000
Referral and Servicing Fee
Related Party Transaction [Line Items]
Revenue from related parties	216		388
Due from related parties	46		46
Fee for Payments Made at Retail Branch Locations
Related Party Transaction [Line Items]
Expenses from transaction with related party	$ 154	$ 76	$ 341	$ 116

Related-Party Transactions - Se

Related-Party Transactions - Securitizations (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Santander
Related Party Transaction [Line Items]
Sale of loans securitized			$ 2,631,313	$ 1,236,331
Due from related parties	$ 3,421		3,421		$ 1,848
Due to related parties	70,546		70,546		$ 12,961
Affiliates | SIS | Fees Paid for Co-Management of Certain Securitizations
Related Party Transaction [Line Items]
Expenses from transaction with related party	$ 148	$ 1,009	$ 858	$ 1,159

Related-Party Transactions - Ot

Related-Party Transactions - Other Information on SPAIN Securitization (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Related Party Transaction [Line Items]
Servicing fee income	$ 11,375	$ 2,625	$ 21,447	$ 5,888
Santander
Related Party Transaction [Line Items]
Servicing fee income	8,622	890	15,822	890
Loss(Gain) on sale, excluding lower of cost or market adjustments (if any)	$ 3,177	$ 3,461	$ 20,080	$ 6,180

Related-Party Transactions - CE

Related-Party Transactions - CEO and Other Employee Compensation (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2018USD ($)
SHUSA | Administrative Services | Affiliates
Related Party Transaction [Line Items]
Due to related parties	$ 360
Due from related parties	340
Chairman and CEO
Related Party Transaction [Line Items]
Compensation expense paid	1,713
Chief Compliance Officer
Related Party Transaction [Line Items]
Compensation expense paid	$ 193

Related-Party Transactions -100

Related-Party Transactions - Other Related Party Transactions (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018USD ($)ft²	Jun. 30, 2017USD ($)	Jun. 30, 2018USD ($)ft²	Jun. 30, 2017USD ($)	Dec. 31, 2017USD ($)
Related Party Transaction [Line Items]
Lease expense	$ 2,531	$ 2,728	$ 5,090	$ 5,467
Future minimum payment of lease	102,042		102,042
Restricted cash	$ 2,125,410	2,756,879	$ 2,125,410	2,756,879	$ 2,553,902
Chairman and CEO, President and CFO and Board Member
Related Party Transaction [Line Items]
Area of leased property (in square foot) | ft²	373,000		373,000
Lease expense	$ 1,208	1,285	$ 2,402	2,560
Lease term	9 years		9 years
Future minimum payment of lease	$ 58,983		$ 58,983
Affiliates | SHUSA
Related Party Transaction [Line Items]
Cyber liability insurance, coverage limit			$ 150,000
Affiliates | Sublease of Corporate Office Space | SBNA
Related Party Transaction [Line Items]
Area of property (in square foot) | ft²	13,000		13,000
Sublease revenue	$ 41	41	$ 82	82
Affiliates | Allocated Portion of Insurance Premiums and Fees | SHUSA
Related Party Transaction [Line Items]
Expenses from transaction with related party	93	78	185	156
Affiliates | Various Other Insurance Products | SHUSA
Related Party Transaction [Line Items]
Expenses from transaction with related party	163	141	325	281
Subsidiaries | Banco Santander Puerto Rico | Demand Deposits
Related Party Transaction [Line Items]
Restricted cash	10,557		10,557		$ 106,596
Produban Servicios Informaticos Generales S.L
Related Party Transaction [Line Items]
Expenses incurred	0	21	0	42
Santander | Procurement Services
Related Party Transaction [Line Items]
Expenses from transaction with related party	$ 379	$ 212	$ 758	$ 212

Computation of Basic and Dil101

Computation of Basic and Diluted Earnings per Common Share - Additional Information (Details) - shares	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Employee Stock Option
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Awards excluded from computation of earnings per share (in shares)	221,572	952,111	221,572	952,111
Restricted Stock Units (RSUs)
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Awards excluded from computation of earnings per share (in shares)	0	479,000	0	555,000

Computation of Basic and Dil102

Computation of Basic and Diluted Earnings per Common Share - Summary of Computation of Basic and Diluted Earnings per Common Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Earnings per common share
Net income	$ 334,641	$ 264,675	$ 576,940	$ 408,102
Weighted average number of common shares outstanding before restricted participating shares (in shares)	361,268,000	359,311,000	360,987,000	359,134,000
Weighted average number of participating restricted common shares outstanding (in shares)	0	150,000	0	150,000
Weighted average number of common shares outstanding (in shares)	361,268,112	359,461,407	360,987,233	359,284,213
Earnings per common share (in usd per share)	$ 0.93	$ 0.74	$ 1.60	$ 1.14
Earnings per common share - assuming dilution
Net income	$ 334,641	$ 264,675	$ 576,940	$ 408,102
Weighted average number of common shares outstanding (in shares)	361,268,112	359,461,407	360,987,233	359,284,213
Effect of employee stock-based awards (in shares)	790,000	368,000	842,000	644,000
Weighted average number of common shares outstanding - assuming dilution (in shares)	362,057,614	359,828,690	361,829,283	359,928,003
Earnings per common share - assuming dilution (in usd per share)	$ 0.92	$ 0.74	$ 1.59	$ 1.13

Fair Value of Financial Inst103

Fair Value of Financial Instruments - Summary of Fair Value Estimates, Methods and Assumptions (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Level 1
Assets:
Cash and cash equivalents	$ 319,688	$ 527,805
Finance receivables held for investment, net	0	0
Restricted cash	2,125,410	2,553,902
Total	2,445,098	3,081,707
Liabilities:
Notes payable — credit facilities	0	0
Notes payable — secured structured financings	0	0
Notes payable — related party	0	0
Total	0	0
Level 2
Assets:
Cash and cash equivalents	0	0
Finance receivables held for investment, net	0	0
Restricted cash	0	0
Total	0	0
Liabilities:
Notes payable — credit facilities	0	0
Notes payable — secured structured financings	16,462,852	12,275,408
Notes payable — related party	0	0
Total	16,462,852	12,275,408
Level 3
Assets:
Cash and cash equivalents	0	0
Finance receivables held for investment, net	25,331,074	24,340,739
Restricted cash	0	0
Total	25,331,074	24,340,739
Liabilities:
Notes payable — credit facilities	4,502,823	4,848,316
Notes payable — secured structured financings	7,889,832	10,412,973
Notes payable — related party	3,068,515	3,754,223
Total	15,461,170	19,015,512
Carrying Value
Assets:
Cash and cash equivalents	319,688	527,805
Finance receivables held for investment, net	23,917,404	22,284,068
Restricted cash	2,125,410	2,553,902
Total	26,362,502	25,365,775
Liabilities:
Notes payable — credit facilities	4,502,823	4,848,316
Notes payable — secured structured financings	24,300,820	22,557,895
Notes payable — related party	3,125,963	3,754,223
Total	31,929,606	31,160,434
Estimated Fair Value
Assets:
Cash and cash equivalents	319,688	527,805
Finance receivables held for investment, net	25,331,074	24,340,739
Restricted cash	2,125,410	2,553,902
Total	27,776,172	27,422,446
Liabilities:
Notes payable — credit facilities	4,502,823	4,848,316
Notes payable — secured structured financings	24,352,684	22,688,381
Notes payable — related party	3,068,515	3,754,223
Total	$ 31,924,022	$ 31,290,920

Fair Value of Financial Inst104

Fair Value of Financial Instruments - Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - Recurring - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Retail installment contracts acquired individually	$ 17,182	$ 22,124
Interest Rate Caps
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other assets	184,822	129,718
Due from affiliates	14,111	6,112
Other liabilities		20,019
Due to affiliates		12,090
Interest Rate Swaps
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other assets	19,596	7,925
Due from affiliates		1,671
Interest Rate Swaps | Cash Flow Hedging
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other assets	74,110	39,036
Due from affiliates		6,950
Trading Options for Interest Rate Caps
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other assets		20,075
Due from affiliates		12,090
Other liabilities	185,020	129,712
Due to affiliates	14,111	6,112
Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Retail installment contracts acquired individually	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Interest Rate Caps
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other assets	0	0
Due from affiliates	0	0
Other liabilities		0
Due to affiliates		0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Interest Rate Swaps
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other assets	0	0
Due from affiliates		0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Interest Rate Swaps | Cash Flow Hedging
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other assets	0	0
Due from affiliates		0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Trading Options for Interest Rate Caps
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other assets		0
Due from affiliates		0
Other liabilities	0	0
Due to affiliates	0	0
Significant Other Observable Inputs (Level 2)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Retail installment contracts acquired individually	0	0
Significant Other Observable Inputs (Level 2) | Interest Rate Caps
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other assets	184,822	129,718
Due from affiliates	14,111	6,112
Other liabilities		20,019
Due to affiliates		12,090
Significant Other Observable Inputs (Level 2) | Interest Rate Swaps
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other assets	19,596	7,925
Due from affiliates		1,671
Significant Other Observable Inputs (Level 2) | Interest Rate Swaps | Cash Flow Hedging
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other assets	74,110	39,036
Due from affiliates		6,950
Significant Other Observable Inputs (Level 2) | Trading Options for Interest Rate Caps
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other assets		20,075
Due from affiliates		12,090
Other liabilities	185,020	129,712
Due to affiliates	14,111	6,112
Significant Unobservable Inputs (Level 3)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Retail installment contracts acquired individually	17,182	22,124
Significant Unobservable Inputs (Level 3) | Interest Rate Caps
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other assets	0	0
Due from affiliates	0	0
Other liabilities		0
Due to affiliates		0
Significant Unobservable Inputs (Level 3) | Interest Rate Swaps
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other assets	0	0
Due from affiliates		0
Significant Unobservable Inputs (Level 3) | Interest Rate Swaps | Cash Flow Hedging
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other assets	0	0
Due from affiliates		0
Significant Unobservable Inputs (Level 3) | Trading Options for Interest Rate Caps
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other assets		0
Due from affiliates		0
Other liabilities	0	0
Due to affiliates	$ 0	$ 0

Fair Value of Financial Inst105

Fair Value of Financial Instruments - Change in Level 3 Balances (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Derivative Financial Instruments, Liabilities | Total Return Settlement
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance — beginning of period		$ 31,123		$ 30,618
(Gains)/losses recognized in earnings		0		505
Balance — end of period		31,123		31,123
Retail Installment Contracts
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance — beginning of period	$ 18,850	30,652	$ 22,124	24,495
Additions / issuances	1,927	6,396	3,276	19,727
Net collection activities	(3,936)	(6,998)	(9,530)	(17,123)
Gains recognized in earnings	341	439	1,312	3,390
Balance — end of period	$ 17,182	$ 30,489	$ 17,182	$ 30,489

Fair Value of Financial Inst106

Fair Value of Financial Instruments - Assets and Liabilities Measured at Fair Value on Nonrecurring Basis (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2018	Dec. 31, 2017
Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Assets, fair value	$ 2,445,098	$ 3,081,707
Significant Other Observable Inputs (Level 2)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Assets, fair value	0	0
Significant Unobservable Inputs (Level 3)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Assets, fair value	25,331,074	24,340,739
Nonrecurring | Vehicles
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Assets, fair value	254,086	293,546
Lower of cost or fair value expense	0	0
Nonrecurring | Vehicles | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Assets, fair value	0	0
Nonrecurring | Vehicles | Significant Other Observable Inputs (Level 2)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Assets, fair value	254,086	293,546
Nonrecurring | Vehicles | Significant Unobservable Inputs (Level 3)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Assets, fair value	0	0
Nonrecurring | Personal loans held for sale
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Assets, fair value	956,455	1,062,089
Lower of cost or fair value expense	134,688	374,374
Nonrecurring | Personal loans held for sale | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Assets, fair value	0	0
Nonrecurring | Personal loans held for sale | Significant Other Observable Inputs (Level 2)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Assets, fair value	0	0
Nonrecurring | Personal loans held for sale | Significant Unobservable Inputs (Level 3)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Assets, fair value	956,455	1,062,089
Nonrecurring | Retail installment contracts held for sale
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Assets, fair value	290,277	1,148,332
Lower of cost or fair value expense	15,026	11,686
Nonrecurring | Retail installment contracts held for sale | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Assets, fair value	0	0
Nonrecurring | Retail installment contracts held for sale | Significant Other Observable Inputs (Level 2)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Assets, fair value	0	0
Nonrecurring | Retail installment contracts held for sale | Significant Unobservable Inputs (Level 3)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Assets, fair value	290,277	1,148,332
Nonrecurring | Auto loans impaired due to bankruptcy
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Assets, fair value	162,184	121,578
Lower of cost or fair value expense	88,812	75,194
Nonrecurring | Auto loans impaired due to bankruptcy | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Assets, fair value	0	0
Nonrecurring | Auto loans impaired due to bankruptcy | Significant Other Observable Inputs (Level 2)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Assets, fair value	162,184	121,578
Nonrecurring | Auto loans impaired due to bankruptcy | Significant Unobservable Inputs (Level 3)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Assets, fair value		$ 0

Fair Value of Financial Inst107

Fair Value of Financial Instruments - Quantitative Information for Assets and Liabilities (Details) - Level 3 $ in Thousands	Jun. 30, 2018USD ($)	Dec. 31, 2017USD ($)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 25,331,074	$ 24,340,739
Retail installment contracts held for investment
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 17,182	$ 22,124
Retail installment contracts held for investment | Discount Rate | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Unobservable Inputs	0.08	0.08
Retail installment contracts held for investment | Discount Rate | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Unobservable Inputs	0.10	0.10
Retail installment contracts held for investment | Default Rate | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Unobservable Inputs	0.15	0.15
Retail installment contracts held for investment | Default Rate | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Unobservable Inputs	0.20	0.20
Retail installment contracts held for investment | Prepayment Rate | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Unobservable Inputs	0.06	0.06
Retail installment contracts held for investment | Prepayment Rate | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Unobservable Inputs	0.08	0.08
Retail installment contracts held for investment | Loss Severity Rate | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Unobservable Inputs	0.50	0.50
Retail installment contracts held for investment | Loss Severity Rate | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Unobservable Inputs	0.60	0.60
Personal loans held for sale
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 956,455	$ 1,062,089
Personal loans held for sale | Market Approach | Market Participant View | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Unobservable Inputs	0.70	0.70
Personal loans held for sale | Market Approach | Market Participant View | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Unobservable Inputs	0.80	0.80
Personal loans held for sale | Income Approach | Discount Rate | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Unobservable Inputs	0.15	0.15
Personal loans held for sale | Income Approach | Discount Rate | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Unobservable Inputs	0.25	0.20
Personal loans held for sale | Income Approach | Default Rate | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Unobservable Inputs	0.30	0.30
Personal loans held for sale | Income Approach | Default Rate | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Unobservable Inputs	0.40	0.40
Personal loans held for sale | Income Approach | Loss Severity Rate | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Unobservable Inputs	0.90	0.90
Personal loans held for sale | Income Approach | Loss Severity Rate | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Unobservable Inputs	0.95	0.95
Personal loans held for sale | Income Approach | Net Principal Payment Rate | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Unobservable Inputs	0.50	0.50
Personal loans held for sale | Income Approach | Net Principal Payment Rate | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Unobservable Inputs	0.70	0.70
Retail installment contracts held for sale
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 290,277	$ 1,148,332
Retail installment contracts held for sale | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Weighted Average Life	2 years
Retail installment contracts held for sale | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Weighted Average Life	3 years
Retail installment contracts held for sale | Discount Rate | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Unobservable Inputs		0.03
Retail installment contracts held for sale | Discount Rate | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Unobservable Inputs		0.06
Retail installment contracts held for sale | Default Rate | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Unobservable Inputs		0.03
Retail installment contracts held for sale | Default Rate | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Unobservable Inputs		0.04
Retail installment contracts held for sale | Prepayment Rate | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Unobservable Inputs		0.15
Retail installment contracts held for sale | Prepayment Rate | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Unobservable Inputs		0.20
Retail installment contracts held for sale | Loss Severity Rate | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Unobservable Inputs		0.50
Retail installment contracts held for sale | Loss Severity Rate | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Unobservable Inputs		0.60
Retail installment contracts held for sale | Expected Yield | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Unobservable Inputs	0.01
Retail installment contracts held for sale | Expected Yield | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Unobservable Inputs	0.02
Retail installment contracts held for sale | Expected Lifetime Cumulative Net Loss | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Unobservable Inputs	0.04
Retail installment contracts held for sale | Expected Lifetime Cumulative Net Loss | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Unobservable Inputs	0.06

Employee Benefit Plans - Additi

Employee Benefit Plans - Additional Information (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017	Dec. 31, 2013	Dec. 31, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock, shares issued	361,660,985		361,660,985		360,779,465
Expiration period			10 years
MEP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common shares stock awards available for grant							29,000,000
Omnibus Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock, shares issued						5,192,641
Omnibus Incentive Plan | Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common shares stock awards available for grant	583,890		583,890
Stock vesting period			5 years
Compensation expense	$ 0	$ 181,000	$ 0	$ 359,000
Omnibus Incentive Plan | Stock Options and Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense			$ 5,794,000	$ 4,084,000
Omnibus Incentive Plan | RSUs | Certain Officers
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Transfer and sale restrictions period			1 year
Omnibus Incentive Plan | RSUs | Certain Officers and Employees
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock vesting period			3 years
Omnibus Incentive Plan | RSUs | Vesting One
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock vesting period			3 years
Omnibus Incentive Plan | RSUs | Vesting Two
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock vesting period			5 years

Employee Benefit Plans - Summar

Employee Benefit Plans - Summary of Stock Options and Related Activity (Details) - USD ($) $ / shares in Units, $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2018	Dec. 31, 2017
Shares
Options outstanding as of beginning of period (in shares)	1,695,008,000
Granted (in shares)	0
Exercised (in shares)	(518,893,000)
Expired (in shares)	(67,579,000)
Forfeited (in shares)	(65,398,000)
Options outstanding as of end of period (in shares)	1,043,138,000	1,695,008,000
Options exercisable as of end of period (in shares)	911,072,000
Weighted Average Exercise Price
Options outstanding as of beginning of period (in usd per share)	$ 12.39
Granted (in usd per share)	0
Exercised (in usd per share)	9.46
Expired (in usd per share)	23.63
Forfeited (in usd per share)	23.57
Options outstanding as of end of period (in usd per share)	12.41	$ 12.39
Options exercisable, Weighted average exercise price as of end of period (in usd per share)	$ 11.25
Weighted Average Remaining Contractual Term (Years)
Options outstanding, Weighted average remaining contractual term (Years)	3 years 8 months 12 days	4 years 8 months 12 days
Options exercisable, Weighted average remaining contractual term (Years)	3 years 4 months 24 days
Aggregate Intrinsic Value
Options outstanding, Aggregate intrinsic value	$ 7,689	$ 12,058
Exercised, Aggregate intrinsic value	4,431
Options exercisable, Aggregate intrinsic value	$ 7,536

Employee Benefit Plans - Schedu

Employee Benefit Plans - Schedule of Restricted Stock and Performance Stock Units (Details) - Restricted Stock and Performance Stock Units - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2018	Dec. 31, 2017
Shares
Outstanding as of beginning of period (in shares)	650,252
Granted (in shares)	591,215
Vested (in shares)	(491,374)
Forfeited/canceled (in shares)	(22,719)
Unvested as of end of period (in shares)	727,374	650,252
Weighted Average Grant Date Fair Value
Outstanding as of beginning of period (in usd per share)	$ 12.68
Granted (in usd per share)	16.35
Vested (in usd per share)	14.20
Forfeited/canceled (in usd per share)	12.74
Unvested as of end of period (in usd per share)	$ 14.58	$ 12.68
Weighted Average Remaining Contractual Term (Years)	1 year 6 months	1 year
Aggregate Intrinsic Value
Outstanding as of beginning of period		$ 12,108
Vested	$ 8,038
Unvested as of end of period	$ 13,886

Shareholders' Equity - Treasury

Shareholders' Equity - Treasury Stock (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2018	Dec. 31, 2013	Dec. 31, 2017
Equity [Abstract]
Number of shares withheld to cover income taxes related to vesting of RSUs	252,002		252,002
Treasury stock value	$ 5,370		$ 5,370
Number of shares repurchased prior to the IPO		3,154
Number of shares withheld for income tax	248,848

Shareholders' Equity - Summary

Shareholders' Equity - Summary of Changes in Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Accumulated Other Comprehensive Income Loss [Line Items]
Cumulative-effect adjustment upon adoption of ASU			$ 0	$ 26,552
Increase (Decrease) in Accumulated Other Comprehensive Loss [Roll Forward]
Beginning balance			6,480,501	5,238,619
Ending balance	$ 7,045,734	$ 5,678,733	7,045,734	5,678,733
Unrealized Gains (Losses) on Cash Flow Hedges
Increase (Decrease) in Accumulated Other Comprehensive Loss [Roll Forward]
Beginning balance	63,211	35,504	44,262	28,259
Other comprehensive income (loss) before reclassifications (gross) (a)	7,015	(14,022)	29,934	(4,123)
Amounts (gross) reclassified out of accumulated other comprehensive income (loss)	(7,777)	6,378	(11,747)	3,724
Ending balance	62,449	27,860	62,449	27,860
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income Loss [Line Items]
Cumulative-effect adjustment upon adoption of ASU			6,149
Increase (Decrease) in Accumulated Other Comprehensive Loss [Roll Forward]
Beginning balance			44,262	28,259
Ending balance	$ 62,449	$ 27,860	$ 62,449	$ 27,860

Shareholders' Equity - Reclassi

Shareholders' Equity - Reclassification of Amounts Out of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income On Derivatives [Line Items]
Cash flow hedges	$ 273,953	$ 233,371	$ 514,981	$ 460,460
Tax expense (benefit)	114,004	83,433	171,315	161,434
Net of tax	(334,641)	(264,675)	(576,940)	(408,102)
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]
Cash flow hedges	(9,095)	8,859	(13,672)	4,619
Tax expense (benefit)	1,318	(2,481)	1,925	(895)
Net of tax	$ (7,777)	$ 6,378	$ (11,747)	$ 3,724

Shareholders' Equity - Dividend

Shareholders' Equity - Dividends (Details) - $ / shares	Aug. 08, 2018	May 31, 2018	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Dividends Payable [Line Items]
Dividend paid per common share (in usd per share)		$ 0.05
Dividends declared, per share (in usd per share)		$ 0.20	$ 0.05	$ 0	$ 0.10	$ 0
Scenario, Forecast
Dividends Payable [Line Items]
Dividend paid per common share (in usd per share)	$ 0.20

Investment Losses, Net - Schedu

Investment Losses, Net - Schedule of Investment Gains (Losses), Net (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Investments, Debt and Equity Securities [Abstract]
Gain (loss) on sale of loans and leases	$ (2,096)	$ (2,179)	$ (18,792)	$ (13,061)
Lower of cost or market adjustments	(79,215)	(95,683)	(149,714)	(161,804)
Other gains, (losses and impairments), net	(1,323)	(1,660)	(648)	(1,056)
Investment losses, net	$ (82,634)	$ (99,522)	$ (169,154)	$ (175,921)

Investment Losses, Net - Additi

Investment Losses, Net - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Investments, Debt and Equity Securities [Abstract]
Lower of cost or market adjustment, customer default activity	$ 89,513	$ 107,717	$ 195,287	$ 224,358
Lower of cost or market adjustment	$ 10,298	$ 12,034	$ 45,573	$ 62,554