Santander Holdings USA (SOV) 10-Q 11 May 17 2017 Q1 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2017	Apr. 30, 2017
Document and Entity Information [Abstract]
Entity Registrant Name	Santander Holdings USA, Inc.
Entity Central Index Key	811,830
Document Type	10-Q
Document Period End Date	Mar. 31, 2017
Amendment Flag	false
Document Fiscal Year Focus	2,017
Document Fiscal Period Focus	Q1
Current Fiscal Year End	--12-31
Entity Filer Category	Non-accelerated Filer
Entity Common Stock, Shares Outstanding		530,391,043

CONDENSED CONSOLIDATED BALANCE

CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands		Mar. 31, 2017	Dec. 31, 2016
ASSETS
Cash and cash equivalents		$ 8,570,489	$ 10,035,859
Investment securities:
Available-for-sale at fair value		18,366,328	17,024,225
Held-to-maturity (fair value of $1,594,256 and $1,635,413 as of March 31, 2017 and December 31, 2016, respectively)		1,621,221	1,658,644
Trading securities		19,386	1,630
Other investments		683,397	730,831
Loans held-for-investment	[1],[2]	83,714,900	85,819,785
Allowance for loan and lease losses	[2]	(3,922,863)	(3,814,464)
Net loans held-for-investment		79,792,037	82,005,321
Loans held-for-sale	[3]	2,102,959	2,586,308
Premises and equipment, net	[4]	959,674	996,498
Operating leases, net	[2],[5]	9,799,941	9,747,223
Accrued interest receivable	[2]	516,539	599,321
Equity method investments		235,876	255,344
Goodwill		4,454,925	4,454,925
Intangible assets, net		581,753	597,244
Bank-owned life insurance		1,771,109	1,767,101
Restricted cash	[2]	3,283,356	3,016,948
Other assets	[2],[6]	2,350,486	1,893,101
TOTAL ASSETS		135,109,476	137,370,523
LIABILITIES
Accrued expenses and payables		2,931,616	2,821,712
Deposits and other customer accounts		66,601,234	67,240,690
Borrowings and other debt obligations	[2]	41,475,698	43,524,445
Advance payments by borrowers for taxes and insurance		211,391	163,498
Deferred tax liabilities, net		492,645	430,548
Other liabilities	[2]	797,142	810,872
TOTAL LIABILITIES		112,509,726	114,991,765
STOCKHOLDER'S EQUITY
Preferred stock (no par value; $25,000 liquidation preference; 7,500,000 shares authorized; 8,000 shares outstanding at both March 31, 2017 and December 31, 2016)		195,445	195,445
Common stock and paid-in capital (no par value; 800,000,000 shares authorized; 530,391,043 shares outstanding at both March 31, 2017 and December 31, 2016)		16,581,877	16,599,497
Accumulated other comprehensive loss		(174,241)	(193,208)
Retained earnings		3,144,344	3,020,149
TOTAL SHUSA STOCKHOLDER'S EQUITY		19,747,425	19,621,883
Noncontrolling interest		2,852,325	2,756,875
TOTAL STOCKHOLDER'S EQUITY		22,599,750	22,378,758
TOTAL LIABILITIES AND STOCKHOLDER'S EQUITY		$ 135,109,476	$ 137,370,523
[1]	Loans held-for-investment ("LHFI") includes $202.5 million and $217.2 million of loans recorded at fair value at March 31, 2017 and December 31, 2016, respectively.
[2]	The Company has interests in certain securitization trusts ("Trusts") that are considered variable interest entities ("VIEs") for accounting purposes. The Company consolidates VIEs where it is deemed the primary beneficiary. See Note 6 to these Condensed Consolidated Financial Statements for additional information.
[3]	Recorded at the fair value option ("FVO") or lower of cost or fair value.
[4]	Net of accumulated depreciation of $1.3 billion and $1.2 billion at March 31, 2017 and December 31, 2016, respectively.
[5]	Net of accumulated depreciation of $2.8 billion and $2.8 billion at March 31, 2017 and December 31, 2016, respectively.
[6]	Includes mortgage servicing rights ("MSRs") of $149.5 million and $146.6 million at March 31, 2017 and December 31, 2016, respectively, for which the Company has elected the FVO. See Note 8 to these Condensed Consolidated Financial Statements for additional information.

CONDENSED CONSOLIDATED BALANCE3

CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) (Parenthetical) - USD ($)	Mar. 31, 2017	Dec. 31, 2016
ASSETS
Held to maturity investment securities	$ 1,594,256,000	$ 1,635,413,000
Loans held for investment, fair value	202,500,000	217,200,000
Accumulated depreciation	$ 1,300,000,000	$ 1,200,000,000
STOCKHOLDER'S EQUITY
Preferred stock, no par value (in usd per share)
Preferred stock, liquidation preference	$ 25,000	$ 25,000
Preferred stock, shares authorized (in shares)	7,500,000	7,500,000
Preferred stock, shares outstanding (in shares)	8,000	8,000
Common stock, no par value (in usd per share)
Common stock, shares authorized (in shares)	800,000,000	800,000,000
Common stock, shares outstanding (in shares)	530,391,043	530,391,043
Vehicles
ASSETS
Leased vehicles, accumulated depreciation	$ 2,752,676,000	$ 2,811,855,000
Residential mortgages
ASSETS
Mortgage servicing rights	$ 149,455,000	$ 146,589,000

CONDENSED CONSOLIDATED STATEMEN

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
INTEREST INCOME:
Loans	$ 1,838,938	$ 1,940,847
Interest-earning deposits	18,433	14,034
Investment securities:
Available-for-sale	81,427	93,705
Held-to-maturity	10,632	0
Other investments	6,163	9,184
TOTAL INTEREST INCOME	1,955,593	2,057,770
INTEREST EXPENSE:
Deposits and other customer accounts	61,993	75,494
Borrowings and other debt obligations	291,035	286,473
TOTAL INTEREST EXPENSE	353,028	361,967
NET INTEREST INCOME	1,602,565	1,695,803
Provision for credit losses	735,445	898,462
NET INTEREST INCOME AFTER PROVISION FOR CREDIT LOSSES	867,120	797,341
NON-INTEREST INCOME:
Consumer fees	112,066	133,469
Commercial fees	42,283	47,208
Mortgage banking income, net	13,174	16,351
Bank-owned life insurance	17,299	13,728
Lease income	496,045	420,856
Miscellaneous income, net	47,032	38,315
TOTAL FEES AND OTHER INCOME	727,899	669,927
Other-than-temporary impairment recognized in earnings	0	(10)
Net gain on sale of investment securities	519	27,260
Net gain recognized in earnings	519	27,250
TOTAL NON-INTEREST INCOME	728,418	697,177
GENERAL AND ADMINISTRATIVE EXPENSES:
Compensation and benefits	452,241	435,632
Occupancy and equipment expenses	162,712	145,831
Technology expense	55,772	55,219
Outside services	48,274	76,393
Marketing expense	31,463	20,478
Loan expense	98,324	102,629
Lease expense	358,792	292,835
Other administrative expenses	102,238	96,365
TOTAL GENERAL AND ADMINISTRATIVE EXPENSES	1,309,816	1,225,382
OTHER EXPENSES:
Amortization of intangibles	15,491	17,932
Deposit insurance premiums and other expenses	17,830	25,512
Equity investment expense, net	2,368	4,192
Loss on debt extinguishment	6,749	32,872
Investment expense on qualified affordable housing projects	638	85
TOTAL OTHER EXPENSES	43,076	80,593
INCOME BEFORE INCOME TAX PROVISION	242,646	188,543
Income tax provision	78,937	78,860
NET INCOME INCLUDING NONCONTROLLING INTEREST	163,709	109,683
LESS: NET INCOME ATTRIBUTABLE TO NONCONTROLLING INTEREST	50,628	71,275
NET INCOME ATTRIBUTABLE TO SANTANDER HOLDINGS USA, INC.	$ 113,081	$ 38,408

CONDENSED CONSOLIDATED STATEME5

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2017	Mar. 31, 2016
Statement of Comprehensive Income [Abstract]
NET INCOME INCLUDING NONCONTROLLING INTEREST		$ 163,709	$ 109,683
OTHER COMPREHENSIVE INCOME, NET OF TAX
Net unrealized losses on cash flow hedge derivative financial instruments, net of tax	[1]	(2,487)	(32,528)
Net unrealized gains on available-for-sale investment securities, net of tax		20,969	145,529
Pension and post-retirement actuarial gains, net of tax		485	565
TOTAL OTHER COMPREHENSIVE INCOME, NET OF TAX		18,967	113,566
COMPREHENSIVE INCOME		182,676	223,249
NET INCOME ATTRIBUTABLE TO NONCONTROLLING INTEREST		50,628	71,275
COMPREHENSIVE INCOME ATTRIBUTABLE TO SHUSA		$ 132,048	$ 151,974
[1]	Excludes $3.0 million and $(15.7) million of other comprehensive income/(loss) attributable to non-controlling interest ("NCI") for the three-month periods ended March 31, 2017 and 2016, respectively.

CONDENSED CONSOLIDATED STATEME6

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Parenthetical) (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Statement of Comprehensive Income [Abstract]
Other comprehensive income (loss) attributable to noncontrolling interest	$ 3	$ (15.7)

CONDENSED CONSOLIDATED STATEME7

CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDER’S EQUITY (Unaudited) - USD ($) $ in Thousands	Total	SC	Common Shares Outstanding	Preferred Stock	Common Stock and Paid-in Capital	Accumulated Other Comprehensive (Loss)/Income	Retained Earnings	Noncontrolling Interest	Noncontrolling InterestSC
Beginning balance (in shares) at Dec. 31, 2015			530,391,000
Equity, Beginning balance at Dec. 31, 2015	$ 21,847,100			$ 270,445	$ 16,629,822	$ (170,530)	$ 2,672,393	$ 2,444,970
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income attributable to Santander Holdings USA, Inc.	151,974					113,566	38,408
Other comprehensive income (loss) attributable to noncontrolling interest	(15,680)							(15,680)
Net income attributable to noncontrolling interest	71,275							71,275
Impact of Santander Consumer USA Holdings Inc. stock option activity		$ 5,254			(13,111)				$ 18,365
Redemption of Preferred Stock	(75,000)			(75,000)
Stock issued in connection with employee benefit and incentive compensation plans	396				396
Dividends paid on preferred stock	(4,178)						(4,178)
Ending balance (in shares) at Mar. 31, 2016			530,391,000
Equity, Ending balance at Mar. 31, 2016	21,981,141			195,445	16,617,107	(56,964)	2,706,623	2,518,930
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative-effect adjustment upon adoption of ASU 2016-09 (Note 1)	$ 25,709				(26,456)		14,764	37,401
Beginning balance (in shares) at Dec. 31, 2016	530,391,043		530,391,000
Equity, Beginning balance at Dec. 31, 2016	$ 22,378,758			195,445	16,599,497	(193,208)	3,020,149	2,756,875
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income attributable to Santander Holdings USA, Inc.	132,048					18,967	113,081
Other comprehensive income (loss) attributable to noncontrolling interest	2,990							2,990
Net income attributable to noncontrolling interest	50,628							50,628
Impact of Santander Consumer USA Holdings Inc. stock option activity		$ 4,431							$ 4,431
Capital contribution from Shareholder	9,000				9,000
Stock issued in connection with employee benefit and incentive compensation plans	(164)				(164)
Dividends paid on preferred stock	$ (3,650)						(3,650)
Ending balance (in shares) at Mar. 31, 2017	530,391,043		530,391,000
Equity, Ending balance at Mar. 31, 2017	$ 22,599,750			$ 195,445	$ 16,581,877	$ (174,241)	$ 3,144,344	$ 2,852,325

CONDENSED CONSOLIDATED STATEME8

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income including noncontrolling interest	$ 163,709	$ 109,683
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for credit losses	735,445	898,462
Deferred tax expense/(benefit)	75,276	51,947
Depreciation, amortization and accretion	199,892	219,221
Net loss on sale of loans	77,753	69,769
Net gain on sale of investment securities	(519)	(27,260)
Net (gain)/loss on sale of operating leases	(319)	63
Other-than-temporary impairment (OTTI) recognized in earnings	0	10
Loss on debt extinguishment	6,749	32,872
Net loss on real estate owned and premises and equipment	2,285	2,832
Stock-based compensation	(1,406)	18,607
Equity earnings from equity method investments	2,368	4,192
Originations of loans held-for-sale, net of repayments	(1,209,200)	(1,612,854)
Purchases of loans held-for-sale	(1,450)	(1,365)
Proceeds from sales of loans held-for-sale	1,559,128	1,269,217
Purchases of trading securities	(17,756)	(172,058)
Proceeds from sales of trading securities	9,145	178,492
Net change in:
Revolving personal loans	(5,064)	(129,330)
Other assets and bank-owned life insurance	(390,846)	(240,616)
Other liabilities	272,436	138,910
NET CASH PROVIDED BY OPERATING ACTIVITIES	1,477,626	810,794
CASH FLOWS FROM INVESTING ACTIVITIES:
Proceeds from sales of available-for-sale investment securities	0	3,435,844
Proceeds from prepayments and maturities of available-for-sale investment securities	1,311,490	1,291,750
Purchases of available-for-sale investment securities	(2,841,388)	(4,263,591)
Proceeds from repayments and maturities of held to maturity investment securities	35,121	0
Proceeds from sales of other investments	64,469	120,198
Purchases of other investments	(13,199)	(74,916)
Net change in restricted cash	(277,535)	(507,405)
Proceeds from sales of LHFI	257,943	934,227
Proceeds from the sales of equity method investments	17,717	0
Distributions from equity method investments	1,144	1,799
Contributions to equity method and other investments	(11,660)	(1,686)
Purchases of LHFI	(64,046)	(39,652)
Net change in loans other than purchases and sales	1,410,582	(1,985,057)
Purchases and originations of operating leases	(1,615,629)	(1,622,199)
Proceeds from the sale and termination of operating leases	1,090,734	480,604
Manufacturer incentives	326,946	335,008
Proceeds from sales of real estate owned and premises and equipment	14,187	18,791
Purchases of premises and equipment	(16,159)	(107,972)
NET CASH USED IN INVESTING ACTIVITIES	(309,283)	(1,984,257)
CASH FLOWS FROM FINANCING ACTIVITIES:
Net change in deposits and other customer accounts	(639,456)	1,886,800
Net change in short-term borrowings	(59,595)	585,622
Net proceeds from long-term borrowings	15,124,445	13,373,270
Repayments of long-term borrowings	(15,514,823)	(10,751,400)
Proceeds from FHLB advances (with terms greater than 3 months)	0	2,100,000
Repayments of FHLB advances (with terms greater than 3 months)	(1,600,000)	(3,582,872)
Net change in advance payments by borrowers for taxes and insurance	47,893	59,970
Cash dividends paid to preferred stockholders	(3,650)	(4,178)
Proceeds from the issuance of common stock	2,473	257
Capital contribution from shareholder	9,000	0
Redemption of preferred stock	0	(75,000)
NET CASH (USED IN) / PROVIDED BY FINANCING ACTIVITIES	(2,633,713)	3,592,469
NET (DECREASE)/INCREASE IN CASH AND CASH EQUIVALENTS	(1,465,370)	2,419,006
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	10,035,859	9,447,007
CASH AND CASH EQUIVALENTS, END OF PERIOD	8,570,489	11,866,013
NON-CASH TRANSACTIONS
Loans transferred to/(from) other real estate owned	(3,717)	32,815
Loans transferred from/(to) held-for-investment (from)/to held-for-sale, net	(18,992)	417,549
Unsettled purchases of investment securities	19,284	0
Unsettled sales of investment securities	0	176,862
Residential loan securitizations	$ 9,272	$ 6,282

BASIS OF PRESENTATION AND ACCOU

BASIS OF PRESENTATION AND ACCOUNTING POLICIES	3 Months Ended
	Mar. 31, 2017
Accounting Policies [Abstract]
BASIS OF PRESENTATION AND ACCOUNTING POLICIES	BASIS OF PRESENTATION AND ACCOUNTING POLICIES Introduction Santander Holdings USA, Inc. ("SHUSA") is the parent company (the "Parent Company") of Santander Bank, National Association, (the "Bank" or "SBNA"), a national banking association; Santander Consumer USA Holdings Inc. (together with its subsidiaries, "SC"), a consumer finance company focused on vehicle finance; Santander BanCorp (together with its subsidiaries, "Santander BanCorp"), a financial holding company headquartered in Puerto Rico that offers a full range of financial services through its wholly-owned banking subsidiary, Banco Santander Puerto Rico; Santander Securities, LLC ("SSLLC"), a Puerto Rico broker-dealer; Banco Santander International ("BSI"), an Edge Act corporation located in Miami, Florida, that offers a full range of banking services to foreign individuals and corporations based primarily in Latin America; Santander Investment Securities Inc. ("SIS"), a registered broker-dealer located in New York providing services in investment banking, institutional sales, trading and offering research reports of Latin American and European equity and fixed income securities; as well as several other subsidiaries. SHUSA is headquartered in Boston, Massachusetts and the Bank's main office is in Wilmington, Delaware. SHUSA is a wholly-owned subsidiary of Banco Santander, S.A. ("Santander"). The Parent Company's two largest subsidiaries are the Bank and SC. The Bank’s primary business consists of attracting deposits and providing other retail banking services through its network of retail branches, and originating small business loans, middle market, large and global commercial loans, multifamily loans, residential mortgage loans, home equity loans and lines of credit, and auto and other consumer loans throughout the Mid-Atlantic and Northeastern areas of the United States, focused throughout Pennsylvania, New Jersey, New York, New Hampshire, Massachusetts, Connecticut, Rhode Island, and Delaware. The Bank uses its deposits, as well as other financing sources, to fund its loan and investment portfolios. SC is a specialized consumer finance company focused on vehicle finance and third-party servicing. SC's primary business is the indirect origination and securitization of retail installment contracts ("RICs") principally through manufacturer-franchised dealers in connection with their sale of new and used vehicles to retail consumers. In conjunction with a ten -year private label financing agreement with Fiat Chrysler Automobiles US LLC ("FCA") that became effective May 1, 2013 (the "Chrysler Agreement"), SC 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 RICs and leases, as well as dealer loans for inventory, construction, real estate, working capital and revolving lines of credit. Refer to Note 14 for additional details. As of March 31, 2017 , SC was owned approximately 58.7% by SHUSA and 41.3% by noncontrolling shareholders. Common shares of SC ("SC Common Stock") are listed for trading on the New York Stock Exchange (the "NYSE") under the trading symbol "SC." Intermediate Holding Company ("IHC") On February 18, 2014, the Board of Governors of the Federal Reserve System (the "Federal Reserve") issued the final rule implementing certain of the enhanced prudential standards mandated by Section 165 of the Dodd-Frank Wall Street Reform and Consumer Protection Act (the "DFA")(the “Final Rule") to strengthen regulatory oversight of foreign banking organizations ("FBOs"). Under the Final Rule, FBOs with over $50 billion of U.S. non-branch assets, including Santander, were required to consolidate U.S. subsidiary activities under an IHC. Due to its U.S. non-branch total consolidated asset size, Santander is subject to the Final Rule. As a result of this rule, Santander transferred substantially all of its equity interests in U.S. bank and non-bank subsidiaries previously outside the Company to the Company, which became an IHC effective July 1, 2016. These subsidiaries included Santander BanCorp, BSI, SIS and SSLLC, as well as several other subsidiaries. Refer to Note 18 for additional details of this transfer. NOTE 1. BASIS OF PRESENTATION AND ACCOUNTING POLICIES (continued) Basis of Presentation These Condensed Consolidated Financial Statements include the accounts of the Company and its subsidiaries, including the Bank, SC, and certain special purpose financing trusts utilized in financing transactions that are considered variable interest entities ("VIEs"). The Company generally consolidates VIEs for which it is deemed to be the primary beneficiary and generally consolidates voting interest entities ("VOEs") in which the Company has a controlling financial interest. The Condensed Consolidated Financial Statements have been prepared by the Company pursuant to Securities and Exchange Commission ("SEC") regulations. All significant intercompany balances and transactions have been eliminated in consolidation. Additionally, where applicable, the Company's accounting policies conform to the accounting and reporting guidelines prescribed by bank regulatory authorities. However, in the opinion of management, the accompanying Condensed Consolidated Financial Statements reflect all adjustments of a normal and recurring nature necessary for a fair statement of the Condensed Consolidated Balance Sheets, Statements of Operations, Statements of Comprehensive Income, Statements of Stockholder's Equity and Statements of Cash Flows ("SCF") for the periods indicated, and contain adequate disclosure for the fair statement of this interim financial information. Significant Accounting Policies Management has identified (i) accounting for consolidation, (ii) business combinations, (iii) the allowance for loan losses for originated and purchased loans and the reserve for unfunded lending commitments, (iv) loan modifications and troubled debt restructurings (“TDRs”), (v) goodwill, (vi) derivatives and hedging activities, and (vii) income taxes as the Company's significant accounting policies and estimates, in that they are important to the portrayal of the Company's financial condition, results of operations and cash flows and the accounting estimates related thereto require management's most difficult, subjective and complex judgments as a result of the need to make estimates about the effect of matters that are inherently uncertain. These Condensed Consolidated Financial Statements should be read in conjunction with the Company's December 31, 2016 Annual Report on Form 10-K. As of March 31, 2017, with the exception of the items noted in the section captioned "Recently Adopted Accounting Policies" below, there have been no significant changes to the Company's accounting policies as disclosed in the Annual Report on Form 10-K for the year ended December 31, 2016. Recently Adopted Accounting Policies Since January 1, 2017, the Company adopted the following Financial Accounting Standards Board ("FASB") Accounting Standards Updates ("ASUs"): • ASU 2016-05, Derivatives and Hedging (Topic 815): Effect of Derivative Contract Novations on Existing Hedge Accounting Relationships. This new guidance clarifies that a change in the counterparties to a derivative contract (i.e. a novation), in and of itself does not require the de-designation of a hedging relationship. An entity will, however, still need to evaluate whether it is probable that the counterparty will perform under the contract as part of its ongoing effectiveness assessment for hedge accounting. The adoption of this ASU did not have an impact on the Company's financial position or results of operations. • ASU 2016-06, Derivatives and Hedging (Topic 815): Contingent Put and Call Options in Debt Instruments. The Company adopted this ASU on a modified retrospective basis. This new guidance clarifies that an exercise contingency does not need to be evaluated to determine whether it relates to interest rates and credit risk in an embedded derivative analysis of hybrid financial instruments. In other words, a contingent put or call option embedded in a debt instrument would be evaluated for possible separate accounting as a derivative instrument without regard to the nature of the exercise contingency. However, as required under existing guidance, companies will still need to evaluate other relevant embedded derivative guidance, such as whether the payoff from the contingent put or call option is adjusted based on changes in an index other than interest rates or credit risk, and whether the debt involves a substantial premium or discount. The adoption of this ASU did not have an impact on the Company's financial position or results of operations. NOTE 1. BASIS OF PRESENTATION AND ACCOUNTING POLICIES (continued) • ASU 2016-07, Investments-Equity Method and Joint Ventures (Topic 323) . This new guidance eliminates the requirement to apply the equity method of accounting retrospectively when a reporting entity obtains significant influence over a previously held investment. Instead, the equity method of accounting should be applied prospectively from the date significant influence is obtained. Investors should add the cost of acquiring the additional interest in the investee (if any) to the current basis of their previously held interest. The new standard also provides specific guidance for available-for-sale securities that become eligible for the equity method of accounting. In those cases, any unrealized gain or loss recorded within accumulated other comprehensive income should be recognized in earnings at the date the investment initially qualifies for the use of the equity method of accounting. The adoption of this ASU did not have an impact on the Company’s financial position or results of operations. • ASU 2016-09, Compensation - Stock Compensation (Topic 718) . This new guidance simplifies certain aspects related to income taxes, the Statement of Cash Flows, and forfeitures when accounting for share-based payment transactions. ASU 2016-09 eliminates the requirement to recognize excess tax benefits in Accumulated Paid In Capital pools, and instead requires companies to record all excess tax benefits and deficiencies at settlement, vesting or expiration in the income statement as provision for income taxes. At adoption of ASU 2016-09 on January 1, 2017, the cumulative-effect for previously unrecognized excess tax benefits totaled $27.1 million net of tax, and was recognized through an increase of $14.8 million to beginning retained earnings and $37.4 million to non-controlling interest, offset by a decrease of $26.5 million to common stock and paid in capital. The Company recorded excess tax benefits, net of tax of $47 thousand in the provision for income taxes rather than as an increase to additional paid in capital for the three-months ended March 31, 2017, on a prospective basis. Therefore, the prior period presented has not been adjusted. All excess tax benefits along with other income tax cash flows will now be classified as an operating activity rather than financing activities in the Statement of Cash Flows on a prospective basis. In addition, the Company changed its accounting policy on forfeitures from previously recognizing forfeitures based on estimating the number of awards expected to be forfeited to electing to recognize forfeiture of awards as they occur to simplify the accounting for forfeitures. This resulted in a cumulative adjustment, as a decrease to, beginning retained earnings of $1.4 million . • ASU 2016-17, Consolidation (Topic 810), Interest Held Through Related Parties That Are Under Common Control. This ASU amends the guidance in GAAP on related parties that are under common control. Specifically, the new ASU requires that a single decision maker consider indirect interests held by related parties under common control on a proportionate basis in a manner consistent with its evaluation of indirect interests held through other related parties. The adoption of this ASU did not have an impact on the Company's financial position or results of operations. Subsequent Events The Company evaluated events from the date of the Condensed Consolidated Financial Statements on March 31, 2017 through the issuance of these Condensed Consolidated Financial Statements , and has determined that there have been no material events that would require recognition in its Condensed Consolidated Financial Statements or disclosure in the Notes to the Condensed Consolidated Financial Statements for the Three-Month Period Ended March 31, 2017 other than the transactions disclosed in Notes 10 and 15.

RECENT ACCOUNTING DEVELOPMENTS

RECENT ACCOUNTING DEVELOPMENTS	3 Months Ended
	Mar. 31, 2017
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
RECENT ACCOUNTING DEVELOPMENTS	RECENT ACCOUNTING DEVELOPMENTS In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers (Topic 606) , superseding the revenue recognition requirements in ASC 605. 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. The amendment includes a five-step process to assist an entity in achieving the main principle(s) of revenue recognition under ASC 605. In August 2015, the FASB issued ASU 2015-14, which formalized the deferral of the effective date of the amendment for a period of one year from the original effective date. Following the issuance of ASU 2015-14, the amendment will be effective for the Company for the first annual period ending beginning after December 15, 2017. In March 2016, the FASB also issued ASU 2016-08, an amendment to the guidance in ASU 2014-09, which revises the structure of the indicators to determine whether the entity is the principal or agent in a revenue transaction, and eliminated two of the indicators (“the entity’s consideration is in the form of a commission” and “the entity is not exposed to credit risk”) in making that determination. This amendment also clarifies that each indicator may be more or less relevant to the assessment depending on the terms and conditions of the contract. In April 2016, the FASB also issued ASU 2016-10, which clarifies the implementation guidance on identifying promised goods or services and on determining whether an entity's promise to grant a license with either a right to use the entity's intellectual property (which is satisfied at a point in time) or a right to access the entity's intellectual property (which is satisfied over time). In May 2016, the FASB issued ASU 2016-12, an amendment to ASU 2014-09, which provided practical expedients related to disclosures of remaining performance obligations, as well as other amendments to guidance on transition, collectability, non-cash consideration and the presentation of sales and other similar taxes. The amendments, collectively, should be applied retrospectively to each prior reporting period presented or as a cumulative effect adjustment as of the date of adoption. Because the ASU does not apply to revenue associated with leases and financial instruments (including loans and securities), the Company does not expect the new guidance to have a material impact on the elements of its Consolidated Statements of Operations most closely associated with leases and financial instruments (such as interest income, interest expense and securities gain). The Company expects to adopt this ASU in the first quarter of 2018 with a cumulative-effect adjustment to opening retained earnings. The Company’s ongoing implementation efforts include the identification of other revenue streams that are within the scope of the new guidance and reviewing related contracts with customers to determine the effect on certain non-interest income items presented in the Consolidated Statements of Operations and on the presentation and disclosures. In January 2016, the FASB issued ASU 2016-01, Financial Instruments - Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities. This amendment requires that equity investments, except those accounted for under the equity method of accounting or which result in consolidation of the investee, be measured at fair value with changes in the fair value being recorded in net income. However, equity investments that do not have readily determinable fair values will be measured at cost less impairment, if any, plus the effect of changes resulting from observable price transactions in orderly transactions or for the identical or similar investment of the same issuer. This amendment also simplifies the impairment assessment of equity instruments that do not have readily determinable fair values, eliminates the requirement to disclose methods and assumptions used to estimate the fair value of instruments measured at their amortized cost on the balance sheet, requires that the disclosed fair values of financial instruments represent the "exit price," requires entities to separately present in other comprehensive income the portion of the total change in fair value of a liability resulting from instrument-specific credit risk when the FVO has been elected for that liability, requires separate presentation of financial assets and financial liabilities by measurement category and form of financial asset on the balance sheet or in the accompanying notes, and clarifies that an entity should evaluate the need for a valuation allowance on its deferred tax asset related to its available-for-sale securities in combination with its other deferred tax assets. This amendment will be effective for the Company for the first reporting period beginning after December 15, 2017, with earlier adoption permitted by public entities on a limited basis. Adoption of this amendment must be applied by means of a cumulative-effect adjustment to the balance sheet as of the beginning of the fiscal year of adoption, except for amendments related to equity instruments that do not have readily determinable fair values for which it should be applied prospectively. While the Company is in the process of evaluating the impacts of the adoption of this ASU, we do not expect the impact to be significant to our financial position or results of operations given the immaterial amount of our investment in equity securities. NOTE 2. RECENT ACCOUNTING DEVELOPMENTS (continued) In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842). The guidance in this update supersedes the current lease accounting guidance for both lessees and lessors under ASC 840, Leases. The new guidance requires lessees to evaluate whether a lease is a finance lease using criteria similar to what lessees use today to determine whether they have a capital lease. Leases not classified as finance leases are classified as operating leases. This classification will determine whether the lease expense is recognized based on an effective interest method or on a straight-line basis over the term of the lease. The lessee is also required to record a right-of-use asset and a lease liability for all leases with a term of greater than 12 months regardless of their classification. Leases with a term of 12 months or less will be accounted for similarly to today’s guidance for operating leases. The new guidance will require lessors to account for leases using an approach that is substantially similar to the existing guidance for sales-type, direct financing leases and operating leases. This new guidance will be effective for the Company for the first reporting period beginning after December 15, 2018, with earlier adoption permitted. The Company does not intend to early adopt this ASU. Adoption of this amendment must be applied on a modified retrospective approach. The Company is in the process of reviewing our existing property and equipment lease contracts as well as service contracts that may include embedded leases. Upon adoption, the Company expects to report higher assets and liabilities from recording the present value of the future minimum lease payments of the leases. In June 2016, the FASB issued ASU 2016-13, Financial Instruments - Credit Losses (Topic 326), Measurement of Credit Losses on Financial Instruments . This new guidance significantly changes how entities will measure credit losses for most financial assets and certain other instruments that are not measured at fair value through net income. The standard will replace today’s “incurred loss” approach with an “expected loss” model for instruments measured at amortized cost. For available-for-sale debt securities, entities will be required to record allowances rather than reduce the carrying amount, as they do today under the other-than-temporary impairment ("OTTI") model. It also simplifies the accounting model for purchased credit-impaired debt securities and loans. The new guidance will be effective for the Company for the first reporting period beginning after December 15, 2019, with earlier adoption permitted. Adoption of this new guidance can be applied only on a prospective basis as a cumulative-effect adjustment to retained earnings. The Company is currently evaluating the impact of the new guidance on its Consolidated Financial Statements. It is expected that the new model will include different assumptions used in calculating credit losses, such as estimating losses over the estimated life of a financial asset, and will consider expected future changes in macroeconomic conditions. The adoption of this ASU may result in an increase to the Company’s allowance for credit losses (“ACL”), which will depend upon the nature and characteristics of the Company's portfolio at the adoption date, as well as the macroeconomic conditions and forecasts at that date. The Company currently does not intend to early adopt this new guidance. In August 2016, the FASB issued ASU 2016-15, Statement of Cash Flows (Topic 230), Classification of Certain Cash Receipts and Cash Payments. This update amends the guidance in ASC 230 on the classification of certain cash receipts and payments in the SCF. The ASU’s amendments add or clarify guidance on eight cash flow issues including debt extinguishment costs, contingent consideration payments made after a business combination, proceeds from the settlement of insurance claims, proceeds from the settlement of corporate-owned life insurance policies, distributions received from equity method investees, beneficial interests in securitization transactions, and separately identifiable cash flows and application of the predominance principle. The guidance will be effective for the fiscal year beginning after December 15, 2017, including interim periods within that year. Early adoption is permitted, including adoption in an interim period; however, any adjustments should be reflected as of the beginning of the fiscal year that includes the period of adoption. All of the amended guidance must be adopted in the same period. The Company does not expect the adoption of this ASU to have an impact on its financial position or results of operations and expects the impact to be to disclosure only. In October 2016, the FASB issued ASU 2016-16, Income Taxes (Topic 740), Intra-Entity Transfers of Assets Other Than Inventory, which will require an entity to recognize the income tax consequences of an intra-entity transfer of an asset, other than inventory, when the transfer occurs. This eliminates the current exception for all intra-entity transfers of an asset other than inventory that requires deferral of the tax effects until the asset is sold to a third party or otherwise recovered through use. The guidance will be effective for the Company for annual reporting periods beginning after December 15, 2017, including interim reporting periods. Early adoption is permitted at the beginning of an annual reporting period for which annual or interim financial statements have not been issued or made available for issuance. The Company is in the process of evaluating the impacts of the adoption of this ASU. NOTE 2. RECENT ACCOUNTING DEVELOPMENTS (continued) In November 2016, the FASB issued ASU 2016-18, Statement of Cash Flows (Topic 230): Restricted Cash (A consensus of the FASB Emerging Issues Task Force), which requires that the SCF include restricted cash in the beginning and end-of-period total amounts shown on the SCF, and that the SCF explain changes in restricted cash during the period. This guidance will be effective for the Company for annual periods beginning after December 15, 2017, including interim periods within those fiscal years. Early adoption is permitted; however, adjustments should be reflected as of the beginning of the fiscal year that includes that interim period. The Company does not expect the adoption of this ASU to have an impact on its financial position or result of operations and expects the impact to be disclosure only. In January 2017, the FASB issued ASU 2017-01, Business Combinations (Topic 805): Clarifying the Definition of a Business. This new guidance revises the definition of a business, potentially affecting areas of accounting such as acquisitions, disposals, goodwill impairment, and consolidation. Under the new guidance, when substantially all of the fair value of gross assets acquired (or disposed of) is concentrated in a single identifiable asset or a group of similar identifiable assets, the assets acquired (or disposed of) would not represent a business. If this initial screen is met, no further analysis would be required. To be considered a business, an acquisition would have to include an input and a substantive process that together significantly contribute to the ability to create an output. In addition, the amendments narrow the definition of the term “output” so that it is consistent with how outputs are defined in ASC Topic 606, Revenue from Contracts with Customers . This new guidance will be effective for the Company for the first reporting period beginning after December 15, 2017, with earlier adoption permitted. Adoption of these amendments must be applied on a prospective basis. The Company is in the process of evaluating the impacts of the adoption of this ASU. In January 2017, the FASB also issued ASU 2017-04, Intangibles - Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment. It removes Step 2 of the goodwill impairment test, which requires a hypothetical purchase price allocation. The new rules provide that a goodwill impairment will be the amount by which a reporting unit’s carrying value exceeds its fair value, not to exceed the carrying amount of goodwill. All other goodwill impairment guidance will remain largely unchanged. The same one-step impairment test will be applied to goodwill at all reporting units, even those with zero or negative carrying amounts. Entities will be required to disclose the amount of goodwill at reporting units with zero or negative carrying amounts. The revised guidance will be applied prospectively, and is effective for calendar year-end SEC filers in 2020. Early adoption is permitted for impairment tests performed after January 1, 2017. The Company is in the process of evaluating the impacts of the adoption of this ASU. In February 2017, the FASB issued 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. It defines an in-substance nonfinancial asset, unifies guidance related to partial sales of nonfinancial assets, eliminates rules specifically addressing the sales of real estate, removes exceptions to the financial asset derecognition model, and clarifies the accounting for contributions of nonfinancial assets to joint ventures. The revised guidance is effective January 1, 2018 and will be applied under either a full retrospective approach or a modified retrospective approach. The Company is in the process of evaluating the impacts of the adoption of this ASU. In March 2017, the FASB issued ASU 2017-07, Compensation - Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost. This new guidance changes how employers that sponsor defined benefit pension plans and other postretirement plans present the net periodic benefit cost in the income statement. An employer is required to report the service cost component in the same line item or items as other compensation costs arising from services rendered by the pertinent employees during the period. Other components of net benefit cost are required to be presented in the income statement separately from the service cost component and outside a subtotal of income from operations, if one is presented. The amendment also allows only the service cost component to be eligible for capitalization, when applicable. This new guidance will be effective for the Company for the first reporting period beginning after December 15, 2017, with earlier adoption permitted. The amendment will be applied retrospectively for the presentation requirements and prospectively for the capitalization of the service cost component requirements. The Company does not expect that the adoption of this ASU will have a material impact on the Company’s financial position or results of operations. NOTE 2. RECENT ACCOUNTING DEVELOPMENTS (continued) In March 2017, the FASB also issued ASU 2017-08, Receivables - Nonrefundable Fees and Other Costs (Subtopic 310-20): Premium Amortization on Purchased Callable Debt Securities. This new guidance requires certain premiums on callable debt securities to be amortized to the earliest call date. Under existing rules, entities generally amortize the premium as an adjustment of yield over the contractual life of the security. The amortization period for callable debt securities purchased at a discount is not affected. This new guidance will be effective for the Company for the first reporting period beginning after December 15, 2018, with earlier adoption permitted. The amendment will be applied on a modified retrospective basis through a cumulative-effect adjustment as of the date of the adoption. The Company is currently evaluating the impact of this ASU.

INVESTMENT SECURITIES

INVESTMENT SECURITIES	3 Months Ended
	Mar. 31, 2017
Investments, Debt and Equity Securities [Abstract]
INVESTMENT SECURITIES	INVESTMENT SECURITIES Investment Securities Summary - Available-for-sale and Held-to-maturity The following tables present the amortized cost, gross unrealized gains and losses and approximate fair values of securities available-for-sale at the dates indicated: March 31, 2017 Amortized Cost Gross Unrealized Gains Gross Unrealized Loss Fair Value (in thousands) U.S. Treasury securities $ 2,303,126 $ 2,554 $ (2,435 ) $ 2,303,245 Corporate debt securities 210,906 — — 210,906 Asset-backed securities (“ABS”) 740,136 15,791 (2,452 ) 753,475 Equity securities 11,800 — (583 ) 11,217 State and municipal securities 28 — — 28 Mortgage-backed securities (“MBS”): U.S. government agencies - Residential 5,280,127 4,491 (57,579 ) 5,227,039 U.S. government agencies - Commercial 916,197 2,410 (9,198 ) 909,409 Federal Home Loan Mortgage Corporation (“FHLMC”) 9,057,713 15,092 (144,618 ) 8,928,187 FHLMC and FNMA - Commercial debt securities 23,475 — (660 ) 22,815 Non-agency securities 7 — — 7 Total investment securities available-for-sale $ 18,543,515 $ 40,338 $ (217,525 ) $ 18,366,328 December 31, 2016 Amortized Cost Gross Unrealized Gains Gross Unrealized Loss Fair Value (in thousands) U.S. Treasury securities $ 1,857,357 $ 1,826 $ (2,326 ) $ 1,856,857 ABS 1,196,702 16,410 (2,388 ) 1,210,724 Equity securities 11,716 — (565 ) 11,151 State and municipal securities 30 — — 30 MBS: U.S. government agencies - Residential 5,424,412 3,253 (64,537 ) 5,363,128 U.S. government agencies - Commercial 948,696 1,998 (8,196 ) 942,498 FHLMC and FNMA - Residential debt securities 7,765,003 6,712 (154,858 ) 7,616,857 FHLMC and FNMA - Commercial debt securities 23,636 — (670 ) 22,966 Non-agency securities 14 — — 14 Total investment securities available-for-sale $ 17,227,566 $ 30,199 $ (233,540 ) $ 17,024,225 NOTE 3. INVESTMENT SECURITIES (continued) The following tables present the amortized cost, gross unrealized gains and losses and approximate fair values of securities held-to-maturity at the dates indicated: March 31, 2017 Amortized Cost Gross Unrealized Gains Gross Unrealized Loss Fair Value (in thousands) MBS: U.S. government agencies - Residential $ 1,621,221 $ 1,477 $ (28,442 ) $ 1,594,256 Total investment securities held-to-maturity $ 1,621,221 $ 1,477 $ (28,442 ) $ 1,594,256 December 31, 2016 Amortized Cost Gross Unrealized Gains Gross Unrealized Loss Fair Value (in thousands) MBS: U.S. government agencies - Residential $ 1,658,644 $ 2,195 $ (25,426 ) $ 1,635,413 Total investment securities held-to-maturity $ 1,658,644 $ 2,195 $ (25,426 ) $ 1,635,413 The Company continuously evaluates its investment strategies in light of changes in the regulatory and market environments that could have an impact on capital and liquidity. Based on this evaluation, it is reasonably possible that the Company may elect to pursue other strategies relative to its investment securities portfolio. As of March 31, 2017 and December 31, 2016 , the Company had investment securities available-for-sale with an estimated fair value of $7.1 billion and $7.2 billion , respectively, pledged as collateral, which was comprised of the following: $3.2 billion and $3.2 billion , respectively, were pledged as collateral for the Company's borrowing capacity with the Federal Reserve Bank ("FRB"); $2.9 billion and $3.0 billion , respectively, were pledged to secure public fund deposits; $106.0 million and $109.7 million , respectively, were pledged to various independent parties to secure repurchase agreements, support hedging relationships, and for recourse on loan sales; $622.3 million and $622.0 million , respectively, were pledged to deposits with clearing organizations; and $372.9 million and $271.2 million , respectively, were pledged to secure the Company's customer overnight sweep product. At March 31, 2017 and December 31, 2016 , the Company had $49.9 million and $44.8 million , respectively, of accrued interest related to investment securities which is included in the Accrued interest receivable line of the Company's Condensed Consolidated Balance Sheet . Contractual Maturity of Debt Securities Contractual maturities of the Company’s debt securities available-for-sale at March 31, 2017 were as follows: Amortized Cost Fair Value (in thousands) Due within one year $ 1,172,284 $ 1,172,700 Due after 1 year but within 5 years 1,924,934 1,940,276 Due after 5 years but within 10 years 222,527 221,086 Due after 10 years 15,211,970 15,021,049 Total $ 18,531,715 $ 18,355,111 NOTE 3. INVESTMENT SECURITIES (continued) Contractual maturities of the Company’s debt securities held-to-maturity at March 31, 2017 were as follows: Amortized Cost Fair Value (in thousands) Due after 10 years $ 1,621,221 $ 1,594,256 Total $ 1,621,221 $ 1,594,256 Actual maturities may differ from contractual maturities when there is a right to call or prepay obligations with or without call or prepayment penalties. Gross Unrealized Loss and Fair Value of Securities Available-for-Sale and Held-to-maturity The following tables present the aggregate amount of unrealized losses as of March 31, 2017 and December 31, 2016 on securities in the Company’s available-for-sale investment portfolios classified according to the amount of time those securities have been in a continuous loss position: March 31, 2017 Less than 12 months 12 months or longer Total Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses (in thousands) U.S. Treasury securities $ 1,280,641 $ (2,435 ) $ — $ — $ 1,280,641 $ (2,435 ) ABS 60,499 (868 ) 119,558 (1,584 ) 180,057 (2,452 ) Equity securities 820 (18 ) 9,785 (565 ) 10,605 (583 ) MBS: U.S. government agencies - Residential 3,349,662 (43,591 ) 993,213 (13,988 ) 4,342,875 (57,579 ) U.S. government agencies - Commercial 550,972 (5,148 ) 95,294 (4,050 ) 646,266 (9,198 ) FHLMC and FNMA - Residential debt securities 4,715,186 (50,045 ) 1,897,958 (94,573 ) 6,613,144 (144,618 ) FHLMC and FNMA - Commercial debt securities 22,354 (651 ) 461 (9 ) 22,815 (660 ) Total investment securities available-for-sale $ 9,980,134 $ (102,756 ) $ 3,116,269 $ (114,769 ) $ 13,096,403 $ (217,525 ) December 31, 2016 Less than 12 months 12 months or longer Total Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses (in thousands) U.S. Treasury securities $ 1,016,654 $ (2,326 ) $ — $ — $ 1,016,654 $ (2,326 ) Corporate debt securities — — — — — — ABS 76,552 (1,021 ) 111,758 (1,367 ) 188,310 (2,388 ) Equity securities 770 (16 ) 9,800 (549 ) 10,570 (565 ) State and municipal securities — — — — — — MBS: U.S. government agencies - Residential 3,831,354 (46,846 ) 1,027,609 (17,691 ) 4,858,963 (64,537 ) U.S. government agencies - Commercial 532,334 (4,451 ) 98,918 (3,745 ) 631,252 (8,196 ) FHLMC and FNMA - Residential debt securities 4,740,824 (58,514 ) 1,981,886 (96,344 ) 6,722,710 (154,858 ) FHLMC and FNMA - Commercial debt securities 22,504 (659 ) 462 (11 ) 22,966 (670 ) Total investment securities available-for-sale $ 10,220,992 $ (113,833 ) $ 3,230,433 $ (119,707 ) $ 13,451,425 $ (233,540 ) NOTE 3. INVESTMENT SECURITIES (continued) The following tables present the aggregate amount of unrealized losses as of March 31, 2017 and December 31, 2016 on securities in the Company’s held-to-maturity investment portfolios classified according to the amount of time those securities have been in a continuous loss position: March 31, 2017 Less than 12 months 12 months or longer Total Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses (in thousands) MBS: U.S. government agencies - Residential $ 1,310,387 $ (28,442 ) $ — $ — $ 1,310,387 $ (28,442 ) Total investment securities held-to-maturity $ 1,310,387 $ (28,442 ) $ — $ — $ 1,310,387 $ (28,442 ) December 31, 2016 Less than 12 months 12 months or longer Total Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses (in thousands) MBS: U.S. government agencies - Residential $ 1,311,390 $ (25,426 ) $ — $ — $ 1,311,390 $ (25,426 ) Total investment securities held-to-maturity $ 1,311,390 $ (25,426 ) $ — $ — $ 1,311,390 $ (25,426 ) OTTI Management evaluates all investment securities in an unrealized loss position for OTTI on at least a quarterly basis. An unrealized loss exists when the current fair value of an individual security is less than its amortized cost basis. The OTTI assessment is a subjective process requiring the use of judgments and assumptions. During the securities-level assessments, consideration is given to (1) the intent not to sell and probability that the Company will not be required to sell the security before recovery of its cost basis to allow for any anticipated recovery in fair value, (2) the financial condition and near-term prospects of the issuer, as well as company news and current events, and (3) the ability to collect the future expected cash flows. Key assumptions utilized to forecast expected cash flows may include loss severity, expected cumulative loss percentage, cumulative loss percentage to date, weighted average Fair Isaac Corporation ("FICO ® ") scores and weighted average LTV ratio, rating or scoring, credit ratings and market spreads, as applicable. The Company assesses and recognizes OTTI in accordance with applicable accounting standards. Under these standards, if the Company determines that impairment on its debt securities exists and it has made the decision to sell the security or it is more likely than not that the Company will be required to sell the security prior to recovery of its amortized cost basis, it recognizes the entire portion of the unrealized loss in earnings. If the Company has not made a decision to sell the security and it does not expect that it will be required to sell the security prior to the recovery of the amortized cost basis but the Company has determined that OTTI exists, it recognizes the credit-related portion of the decline in value of the security in earnings. The Company did not record any material OTTI in earnings related to its investment securities in the three-month periods ended March 31, 2017 or March 31, 2016 . Management has concluded that the unrealized losses on its debt and equity securities for which it has not recognized OTTI (which were comprised of 552 individual securities at March 31, 2017 ) are temporary in nature since (1) they are not related to the underlying credit quality of the issuers, (2) the entire contractual principal and interest due on these securities is currently expected to be recoverable, (3) the Company does not intend to sell these investments at a loss and (4) it is more likely than not that the Company will not be required to sell the investments before recovery of the amortized cost basis, which for the Company's debt securities, may be at maturity. Accordingly, the Company has concluded that the impairment on these securities is not other-than-temporary. NOTE 3. INVESTMENT SECURITIES (continued) Gains (Losses) and Proceeds on Sales of Securities Proceeds from sales of investment securities and the realized gross gains and losses from those sales are as follows: Three-Month Period Ended March 31, 2017 2016 (in thousands) Proceeds from the sales of available-for-sale securities $ — $ 3,435,844 Gross realized gains $ — $ 26,707 Gross realized losses — (276 ) OTTI — (10 ) Net realized gains (1) $ — $ 26,421 (1) Excludes the net realized gains/(losses) related to Trading Securities. The Company uses the specific identification method to determine the cost of the securities sold and the gain or loss recognized. The Company recognized $26.4 million for the three-month period ended March 31, 2016 , in net gains on sale of investment securities as a result of overall balance sheet and interest rate risk management. The net gain realized for the three-month period ended March 31, 2016 was primarily comprised of the sale of state and municipal securities with a book value of $726.8 million for a gain of $19.5 million , and the sale of U.S. Treasury securities with a book value of $2.8 billion for a gain of $6.7 million . The Company did not sell any available for sale investment securities during the three-month period ended March 31, 2017 . Trading Securities The Company held $19.4 million of trading securities as of March 31, 2017 , compared to $1.6 million held at December 31, 2016 . Gains and losses on trading securities are recorded within Net gain on sale of investment securities on the Company's Condensed Consolidated Statement of Operations . Other Investments Other investments primarily include the Company's investment in the stock of the FHLB of Pittsburgh and the FRB with aggregate carrying amounts of $630.1 million and $680.5 million as of March 31, 2017 and December 31, 2016 , respectively. These stocks do not have readily determinable fair values because their ownership is restricted and they lack a market. The stocks can be sold back only at their par value of $100 per share, and FHLB stock can be sold back only to FHLB or to another member institution. Accordingly, these stocks are carried at cost. During the three-month period ended March 31, 2017 , the Company purchased $13.2 million of FHLB stock at par, and redeemed $64.5 million of FHLB stock at par. There was no gain or loss associated with these redemptions. During the three-month period ended March 31, 2017 , the Company did not purchase any FRB stock. Other investments also include $53.3 million and $50.4 million of low-income housing tax credit ("LIHTC") investments as of March 31, 2017 and December 31, 2016 , respectively. The Company evaluates these investments for impairment based on the ultimate recoverability of the carrying value, rather than by recognizing temporary declines in value.

LOANS AND ALLOWANCE FOR CREDIT

LOANS AND ALLOWANCE FOR CREDIT LOSSES	3 Months Ended
	Mar. 31, 2017
Loans and Leases Receivable Disclosure [Abstract]
LOANS AND ALLOWANCE FOR CREDIT LOSSES	=640 3,540,719 13.4 % 3,646,485 13.7 % Total $ 26,479,539 100.0 % $ 26,498,469 100.0 % (1) Consists primarily of loans for which credit scores are not considered in the ALLL model. (2) Credit scores updated quarterly. (3) RICs and auto loans include $773.1 million and $924.7 million of LHFS at March 31, 2017 and December 31, 2016 that do not have an allowance. Consumer Lending Asset Quality Indicators-FICO ® and Loan-to-Value (“LTV”) Ratio For both residential and home equity loans, loss severity assumptions are incorporated in the loan and lease loss reserve models to estimate loan balances that will ultimately charge-off. These assumptions are based on recent loss experience within various current LTV bands within these portfolios. LTVs are refreshed quarterly by applying Federal Housing Finance Agency Home price index changes at a state-by-state level to the last known appraised value of the property to estimate the current LTV. The Company's ALLL incorporates the refreshed LTV information to update the distribution of defaulted loans by LTV as well as the associated loss given default for each LTV band. Reappraisals on a recurring basis at the individual property level are not considered cost-effective or necessary; however, reappraisals are performed on certain higher risk accounts to support line management activities, default servicing decisions, or when other situations arise for which the Company believes the additional expense is warranted. Residential mortgage and home equity financing receivables by LTV and FICO ® range are summarized as follows: Residential Mortgages (1)(3) March 31, 2017 N/A (2) LTV<=70% 70.01-80% 80.01-90% 90.01-100% 100.01-110% LTV>110% Grand Total FICO ® Score (dollars in thousands) N/A (2) $ 299,444 $ 22,518 $ 15,738 $ 4,435 $ 3,630 $ — $ — $ 345,765 <600 74 249,791 67,644 47,400 29,611 3,899 4,297 402,716 600-639 49 155,608 48,930 39,284 34,524 4,928 5,547 288,870 640-679 153 315,898 99,914 84,830 95,600 5,320 8,635 610,350 680-719 49 529,557 211,825 134,939 141,692 5,622 11,651 1,035,335 720-759 16 842,347 397,595 160,548 152,397 8,308 13,715 1,574,926 >=760 516 2,491,175 857,462 229,408 184,825 10,184 16,583 3,790,153 Grand Total $ 300,301 $ 4,606,894 $ 1,699,108 $ 700,844 $ 642,279 $ 38,261 $ 60,428 $ 8,048,115 (1) Includes LHFS. (2) Residential mortgages and home equity loans and lines of credit in the "N/A" range for LTV or FICO ® score primarily represent the balance on loans serviced by others, in run-off portfolios or for which a current LTV or FICO ® score is unavailable. (3) Allowance model considers LTV for financing receivables in first lien position for the Company and combined LTV ("CLTV") for financing receivables in second lien position for the Company. NOTE 4. LOANS AND ALLOWANCE FOR CREDIT LOSSES (continued) Home Equity Loans and Lines of Credit (2) March 31, 2017 N/A (1) LTV<=70% 70.01-90% 90.01-110% LTV>110% Grand Total FICO ® Score (dollars in thousands) N/A (1) $ 166,218 $ 338 $ 12 $ — $ — $ 166,568 <600 9,696 165,358 66,917 16,409 13,164 271,544 600-639 7,033 148,208 71,034 11,296 9,047 246,618 640-679 7,464 266,495 145,082 25,999 15,754 460,794 680-719 8,942 461,925 272,541 38,428 20,930 802,766 720-759 10,061 647,477 384,010 43,253 25,126 1,109,927 >=760 19,283 1,784,699 933,309 94,962 50,870 2,883,123 Grand Total $ 228,697 $ 3,474,500 $ 1,872,905 $ 230,347 $ 134,891 $ 5,941,340 (1) Residential mortgages and home equity loans and lines of credit in the "N/A" range for LTV or FICO ® score primarily represent the balance on loans serviced by others, in run-off portfolios or for which a current LTV or FICO ® score is unavailable. (2) Allowance model considers LTV for financing receivables in first lien position for the Company and CLTV for financing receivables in second lien position for the Company. Residential Mortgages (1)(3) December 31, 2016 N/A (2) LTV<=70% 70.01-80% 80.01-90% 90.01-100% 100.01-110% LTV>110% Grand Total FICO ® Score (dollars in thousands) N/A (2) $ 696,730 $ 102,911 $ 4,635 $ 2,327 $ 196 $ 150 $ — $ 806,949 <600 80 228,794 70,793 49,253 30,720 6,622 5,885 392,147 600-639 147 152,728 48,006 42,443 42,356 4,538 6,675 296,893 640-679 98 283,054 101,495 81,669 93,552 5,287 4,189 569,344 680-719 112 487,257 193,351 136,937 146,090 6,766 11,795 982,308 720-759 56 767,192 348,524 163,163 178,264 8,473 16,504 1,482,176 >=760 495 2,415,542 860,582 219,014 180,841 11,134 20,740 3,708,348 Grand Total $ 697,718 $ 4,437,478 $ 1,627,386 $ 694,806 $ 672,019 $ 42,970 $ 65,788 $ 8,238,165 (1) Includes LHFS. (2) Residential mortgages and home equity loans and lines of credit in the "N/A" range for LTV or FICO ® score primarily represent the balance on loans serviced by others, in run-off portfolios or for which a current LTV or FICO ® score is unavailable. (3) Allowance model considers LTV for financing receivables in first lien position for the Company and CLTV for fina" id="sjs-B4" xml:space="preserve"> LOANS AND ALLOWANCE FOR CREDIT LOSSES Overall The Company's loans are reported at their outstanding principal balances net of any unearned income, cumulative charge-offs, unamortized deferred fees and costs and unamortized premiums or discounts. The Company maintains an ACL to provide for losses inherent in its portfolios. Certain loans are pledged as collateral for borrowings, securitizations, or special purpose entities ("SPEs"). These loans totaled $52.4 billion at March 31, 2017 and $53.5 billion at December 31, 2016 . Loans that the Company intends to sell are classified as loans-held-for-sale (“LHFS”). The LHFS portfolio balance at March 31, 2017 was $2.1 billion , compared to $2.6 billion at December 31, 2016 . LHFS in the residential mortgage portfolio are either reported at fair value or at the lower of cost or fair value. For a discussion on the valuation of LHFS at fair value, see Note 16 to the Condensed Consolidated Financial Statements . During the third quarter of 2015, the Company determined that it no longer intended to hold certain personal lending assets at SC for investment. The Company adjusted the ACL associated with SC's personal loan portfolio through the provision for credit losses to value the portfolio at the lower of cost or market. Upon transferring the loans to LHFS at fair value, the adjusted credit loss allowance was released as a charge-off. Loan originations and purchases under SC’s personal lending platform during 2016 have been classified as held for sale and subsequent adjustments to lower of cost or market are recorded through Miscellaneous Income (Expense), net on the Condensed Consolidated Statements of Operations . As of March 31, 2017 , the carrying value of the personal unsecured held-for-sale portfolio was $979.1 million . Interest income on loans is accrued based on the contractual interest rate and the principal amount outstanding, except for those loans classified as non-accrual. At March 31, 2017 and December 31, 2016 , accrued interest receivable on the Company's loans was $466.6 million and $554.5 million , respectively. NOTE 4. LOANS AND ALLOWANCE FOR CREDIT LOSSES (continued) Loan and Lease Portfolio Composition The following presents the composition of the gross loans and leases held-for-investment by portfolio and by rate type: March 31, 2017 December 31, 2016 Amount Percent Amount Percent (dollars in thousands) Commercial loans held-for-investment (“LHFI”): Commercial real estate loans $ 9,883,926 11.8 % $ 10,112,043 11.8 % Commercial and industrial loans 17,218,865 20.6 % 18,812,002 21.9 % Multifamily loans 8,462,464 10.1 % 8,683,680 10.1 % Other commercial (2) 6,746,717 8.0 % 6,832,403 8.0 % Total commercial LHFI 42,311,972 50.5 % 44,440,128 51.8 % Consumer loans secured by real estate: Residential mortgages 7,801,175 9.3 % 7,775,272 9.1 % Home equity loans and lines of credit 5,941,340 7.1 % 6,001,192 7.0 % Total consumer loans secured by real estate 13,742,515 16.4 % 13,776,464 16.1 % Consumer loans not secured by real estate: RICs and auto loans - originated 22,729,892 27.2 % 22,104,918 25.8 % RICs and auto loans - purchased 2,976,567 3.6 % 3,468,803 4.0 % Personal unsecured loans 1,211,922 1.4 % 1,234,094 1.4 % Other consumer (3) 742,032 0.9 % 795,378 0.9 % Total consumer loans 41,402,928 49.5 % 41,379,657 48.2 % Total LHFI (1) $ 83,714,900 100.0 % $ 85,819,785 100.0 % Total LHFI: Fixed rate $ 50,822,537 60.7 % $ 51,752,761 60.3 % Variable rate 32,892,363 39.3 % 34,067,024 39.7 % Total LHFI (1) $ 83,714,900 100.0 % $ 85,819,785 100.0 % (1) Total LHFI includes deferred loan fees, net of deferred origination costs and unamortized purchase premiums, net of discounts as well as purchase accounting adjustments. These items resulted in a net increase in the loan balances of $968.3 million and $845.8 million as of March 31, 2017 and December 31, 2016 , respectively. (2) Other commercial includes $3.6 billion and $3.7 billion at March 31, 2017 and December 31, 2016 , respectively, of loans not defined as commercial or consumer for regulatory purposes, but which are defined as "Other." The remainder of the balance primarily includes commercial equipment vehicle financing ("CEVF") leveraged leases and loans. (3) Other consumer primarily includes recreational vehicle ("RV") and marine loans. Portfolio segments and classes GAAP requires that entities disclose information about the credit quality of their financing receivables at disaggregated levels, specifically defined as “portfolio segments” and “classes,” based on management’s systematic methodology for determining the ACL. The Company utilizes an alternate categorization compared to the financial statement categorization of loans, to model and calculate the ACL and track the credit quality, delinquency and impairment status of the underlying loan populations. In disaggregating its financing receivables portfolio, the Company’s methodology begins with the commercial and consumer segments. The commercial segmentation reflects line of business distinctions. The three commercial real estate lines of business distinctions include “Corporate banking,” which includes commercial and industrial owner-occupied real estate, “Middle market real estate,” which represents the portfolio of specialized lending for investment real estate, including financing for continuing care retirement communities and “Santander real estate capital”, which is the commercial real estate portfolio of the specialized lending group. "Commercial and industrial" includes non-real estate-related commercial and industrial loans. "Multifamily" represents loans for multifamily residential housing units. “Other commercial” includes loans to global customer relationships in Latin America which are not defined as commercial or consumer for regulatory purposes. The remainder of the portfolio primarily represents the CEVF business. NOTE 4. LOANS AND ALLOWANCE FOR CREDIT LOSSES (continued) The following table reconciles the Company's recorded investment classified by its major portfolio classifications to its commercial loan classifications utilized in its determination of the allowance for loan and lease losses (“ALLL”) and other credit quality disclosures at March 31, 2017 and December 31, 2016 , respectively: Commercial Portfolio Segment (2) Major Loan Classifications (1) March 31, 2017 December 31, 2016 (in thousands) Commercial LHFI: Commercial real estate: Corporate Banking $ 3,505,092 $ 3,693,109 Middle Market Real Estate 5,205,976 5,180,572 Santander Real Estate Capital 1,172,858 1,238,362 Total commercial real estate 9,883,926 10,112,043 Commercial and industrial (3) 17,218,865 18,812,002 Multifamily 8,462,464 8,683,680 Other commercial 6,746,717 6,832,403 Total commercial LHFI $ 42,311,972 $ 44,440,128 (1) These represent the Company's loan categories based on SEC Regulation S-X, Article 9. (2) These represent the Company's loan classes used to determine its ALLL. (3) Commercial and industrial loans excluded $103.8 million of LHFS at March 31, 2017 and excluded $121.1 million of LHFS at December 31, 2016 . The Company's portfolio classes are substantially the same as its financial statement categorization of loans for the consumer loan populations. “Residential mortgages” includes mortgages on residential property including single family and 1-4 family units. "Home equity loans and lines of credit" include all organic home equity contracts and purchased home equity portfolios. "RIC and auto loans" includes the Company's direct automobile loan portfolios, but excludes RV and marine RICs. "Personal unsecured loans" includes personal revolving loans and credit cards. “Other consumer” includes an acquired portfolio of marine RICs and RV contracts as well as indirect auto loans. In accordance with the Company's accounting policy when establishing the collective ACL for originated loans, the Company's estimate of losses on recorded investment includes the estimate of the related net unaccreted discount balance that is expected at the time of charge-off, while it considers the entire unaccreted discount for loan portfolios purchased at a discount as available to absorb the credit losses when determining the ACL specific to these portfolios. This accounting policy is not applicable for the purchased loan portfolios acquired with evidence of credit deterioration, on which we elected to apply the FVO. Consumer Portfolio Segment (2) Major Loan Classifications (1) March 31, 2017 December 31, 2016 (in thousands) Consumer loans secured by real estate: Residential mortgages (3) $ 7,801,175 $ 7,775,272 Home equity loans and lines of credit 5,941,340 6,001,192 Total consumer loans secured by real estate 13,742,515 13,776,464 Consumer loans not secured by real estate: RICs and auto loans - originated (4) 22,729,892 22,104,918 RICs and auto loans - purchased (4) 2,976,567 3,468,803 Personal unsecured loans (5) 1,211,922 1,234,094 Other consumer 742,032 795,378 Total consumer LHFI $ 41,402,928 $ 41,379,657 (1) These represent the Company's loan categories based on the SEC's Regulation S-X, Article 9. (2) These represent the Company's loan classes used to determine its ALLL. (3) Residential mortgages exclude $246.9 million and $462.9 million of LHFS at March 31, 2017 and December 31, 2016 , respectively. (4) RIC and auto loans exclude $773.1 million and $924.7 million of LHFS at March 31, 2017 and December 31, 2016 , respectively. (5) Personal unsecured loans exclude $1.0 billion and $1.1 billion of LHFS at March 31, 2017 and December 31, 2016 , respectively. NOTE 4. LOANS AND ALLOWANCE FOR CREDIT LOSSES (continued) The RIC and auto loan portfolio is comprised of: (1) RICs originated by SC prior to the first quarter 2014 change in control and consolidation of SC (the “Change in Control"), (2) RICs originated by SC after the Change in Control, and (3) auto loans originated by SBNA. The composition of the portfolio segment is as follows: March 31, 2017 December 31, 2016 (in thousands) RICs - Purchased: Unpaid principal balance ("UPB") (1) $ 3,216,330 $ 3,765,714 UPB - FVO (2) 17,321 29,481 Total UPB 3,233,651 3,795,195 Purchase Marks (3) (257,084 ) (326,392 ) Total RICs - Purchased 2,976,567 3,468,803 RICs - Originated: UPB (1) 23,112,453 22,527,753 Net discount (400,495 ) (441,131 ) Total RICs - Originated 22,711,958 22,086,622 SBNA auto loans 17,934 18,296 Total RICs - originated post change in control $ 22,729,892 $ 22,104,918 Total RICs and auto loans $ 25,706,459 $ 25,573,721 (1) UPB does not include amounts related to the loan receivables - unsecured and loan receivables from dealers due to the short-term and revolving nature of these receivables. (2) The Company elected to account for these loans, which were acquired with evidence of credit deterioration, under the FVO. (3) Includes purchase marks of $3.7 million and $6.7 million related to purchased loan portfolios on which we elected to apply the FVO at March 31, 2017 and December 31, 2016 , respectively. During the three months ended March 31, 2017 and 2016, the Company originated $1.6 billion and $2.5 billion , respectively, in Chrysler Capital loans, which represented 42% and 49% , respectively, of total RIC originations. As of March 31, 2017 and December 31, 2016, SC's auto RIC portfolio consisted of $7.1 billion and $7.4 billion , respectively, of Chrysler Capital loans which represented 31% and 32% , respectively, of SC's auto RIC portfolio. NOTE 4. LOANS AND ALLOWANCE FOR CREDIT LOSSES (continued) ACL Rollforward by Portfolio Segment The activity in the ACL by portfolio segment for the three-month period ended March 31, 2017 and 2016 was as follows: Three-Month Period Ended March 31, 2017 Commercial Consumer Unallocated Total (in thousands) ALLL, beginning of period $ 449,835 $ 3,317,606 $ 47,023 $ 3,814,464 Provision for loan and lease losses 18,777 718,558 — 737,335 Charge-offs (26,173 ) (1,237,280 ) — (1,263,453 ) Recoveries 10,580 623,937 — 634,517 Charge-offs, net of recoveries (15,593 ) (613,343 ) — (628,936 ) ALLL, end of period $ 453,019 $ 3,422,821 $ 47,023 $ 3,922,863 Reserve for unfunded lending commitments, beginning of period $ 121,613 $ 806 $ — $ 122,419 Provision for unfunded lending commitments (1,860 ) (30 ) — (1,890 ) Loss on unfunded lending commitments (133 ) — — (133 ) Reserve for unfunded lending commitments, end of period 119,620 776 — 120,396 Total ACL, end of period $ 572,639 $ 3,423,597 $ 47,023 $ 4,043,259 Ending balance, individually evaluated for impairment (1) $ 99,914 $ 1,518,545 $ — $ 1,618,459 Ending balance, collectively evaluated for impairment 353,105 1,904,276 47,023 2,304,404 Financing receivables: Ending balance $ 42,415,806 $ 43,402,053 $ — $ 85,817,859 Ending balance, evaluated under the FVO or lower of cost or fair value 103,834 2,008,152 — 2,111,986 Ending balance, individually evaluated for impairment (1) 675,116 6,040,694 — 6,715,810 Ending balance, collectively evaluated for impairment 41,636,856 35,353,207 — 76,990,063 (1) Consists of loans in TDR status. NOTE 4. LOANS AND ALLOWANCE FOR CREDIT LOSSES (continued) Three-Month Period Ended March 31, 2016 Commercial Consumer Unallocated Total (in thousands) ALLL, beginning of period $ 456,812 $ 2,742,088 $ 47,245 $ 3,246,145 Provision for loan and lease losses 117,933 755,982 — 873,915 Charge-offs (43,009 ) (1,142,160 ) — (1,185,169 ) Recoveries 25,907 607,065 — 632,972 Charge-offs, net of recoveries (17,102 ) (535,095 ) — (552,197 ) ALLL, end of period $ 557,643 $ 2,962,975 $ 47,245 $ 3,567,863 Reserve for unfunded lending commitments, beginning of period $ 148,207 $ 814 $ — $ 149,021 Provision for unfunded lending commitments 24,621 (74 ) — 24,547 Reserve for unfunded lending commitments, end of period 172,828 740 — 173,568 Total ACL, end of period $ 730,471 $ 2,963,715 $ 47,245 $ 3,741,431 Ending balance, individually evaluated for impairment (2) $ 140,463 $ 1,024,070 $ — $ 1,164,533 Ending balance, collectively evaluated for impairment 417,180 1,938,905 47,245 2,403,330 Financing receivables: Ending balance $ 47,432,421 $ 43,712,054 $ — $ 91,144,475 Ending balance, evaluated under the fair value option or lower of cost or fair value (1) — 2,834,770 — 2,834,770 Ending balance, individually evaluated for impairment (2) 745,842 4,703,087 — 5,448,929 Ending balance, collectively evaluated for impairment 46,686,579 36,174,197 — 82,860,776 (1) Consists of loans in TDR status. NOTE 4. LOANS AND ALLOWANCE FOR CREDIT LOSSES (continued) The following table presents the activity in the allowance for loan losses for the RICs acquired in the Change in Control and those originated by SC subsequent to the Change in Control. Three-Month Period Ended March 31, 2017 Purchased Originated Total (in thousands) ALLL, beginning of period $ 559,092 $ 2,538,127 $ 3,097,219 Provision for / (release of) loan and lease losses 26,125 660,524 686,649 Charge-offs (188,686 ) (1,008,053 ) (1,196,739 ) Recoveries 98,690 517,286 615,976 Charge-offs, net of recoveries (89,996 ) (490,767 ) (580,763 ) ALLL, end of period $ 495,221 $ 2,707,884 $ 3,203,105 Three-Month Period Ended March 31, 2016 Purchased Originated Total (in thousands) ALLL, beginning of period $ 590,807 $ 1,891,989 $ 2,482,796 Provision for / (release of) loan and lease losses 73,635 674,420 748,055 Charge-offs (264,792 ) (825,080 ) (1,089,872 ) Recoveries 189,457 395,941 585,398 Charge-offs, net of recoveries (75,335 ) (429,139 ) (504,474 ) ALLL, end of period $ 589,107 $ 2,137,270 $ 2,726,377 NOTE 4. LOANS AND ALLOWANCE FOR CREDIT LOSSES (continued) Non-accrual loans by Class of Financing Receivable The recorded investment in non-accrual loans disaggregated by class of financing receivables and other non-performing assets is summarized as follows: March 31, 2017 December 31, 2016 (in thousands) Non-accrual loans: Commercial: Commercial real estate: Corporate banking $ 90,858 $ 104,879 Middle market commercial real estate 65,395 71,264 Santander real estate capital 1,620 3,077 Commercial and industrial 211,507 182,368 Multifamily 5,034 8,196 Other commercial 6,081 11,097 Total commercial loans 380,495 380,881 Consumer: Residential mortgages 278,627 287,140 Home equity loans and lines of credit 113,395 120,065 RICs and auto loans - originated 1,471,741 1,045,587 RICs - purchased 350,367 284,486 Personal unsecured loans 5,249 5,201 Other consumer 11,400 12,694 Total consumer loans 2,230,779 1,755,173 Total non-accrual loans 2,611,274 2,136,054 Other real estate owned ("OREO") 117,845 116,705 Repossessed vehicles 178,747 173,754 Foreclosed and other repossessed assets 1,541 3,838 Total OREO and other repossessed assets 298,133 294,297 Total non-performing assets $ 2,909,407 $ 2,430,351 Age Analysis of Past Due Loans For reporting of past due loans, a payment of 90% or more of the amount due is considered to meet the contractual requirements. For certain RICs originated prior to January 1, 2017, the Company considers 50% of a single payment due sufficient to qualify as a payment for past due classification purposes. For RICs originated after January 1, 2017, the required minimum payment is 90% of the scheduled payment, regardless of which origination channel the receivable was originated through. The Company aggregates partial payments in determining whether a full payment has been missed in computing past due status. NOTE 4. LOANS AND ALLOWANCE FOR CREDIT LOSSES (continued) The age of recorded investments in past due loans and accruing loans greater than 90 days past due disaggregated by class of financing receivables is summarized as follows: As of: March 31, 2017 30-89 Greater Total Current Total (1) Recorded Investment (in thousands) Commercial: Commercial real estate: Corporate banking $ 28,982 $ 37,630 $ 66,612 $ 3,438,480 $ 3,505,092 $ — Middle market commercial real estate 6,856 48,559 55,415 5,150,561 5,205,976 — Santander real estate capital — — — 1,172,858 1,172,858 — Commercial and industrial 112,319 37,295 149,614 17,173,085 17,322,699 — Multifamily 1,064 762 1,826 8,460,638 8,462,464 — Other commercial 31,996 2,948 34,944 6,711,773 6,746,717 — Consumer: Residential mortgages 192,400 216,636 409,036 7,639,079 8,048,115 — Home equity loans and lines of credit 35,718 71,770 107,488 5,833,852 5,941,340 — RICs and auto loans - originated 3,089,483 230,331 3,319,814 20,183,159 23,502,973 — RICs and auto loans - purchased 728,397 45,630 774,027 2,202,539 2,976,566 — Personal unsecured loans 97,675 92,484 190,159 2,000,868 2,191,027 82,641 Other consumer 25,271 17,019 42,290 699,742 742,032 — Total $ 4,350,161 $ 801,064 $ 5,151,225 $ 80,666,634 $ 85,817,859 $ 82,641 (1) Financing receivables include LHFS. NOTE 4. LOANS AND ALLOWANCE FOR CREDIT LOSSES (continued) As of December 31, 2016 30-89 Greater Total Current Total (1) Recorded (in thousands) Commercial: Commercial real estate: Corporate banking $ 14,973 $ 40,170 $ 55,143 $ 3,637,966 $ 3,693,109 $ — Middle market commercial real estate 6,967 57,520 64,487 5,116,085 5,180,572 — Santander real estate capital 177 — 177 1,238,185 1,238,362 — Commercial and industrial 46,104 33,800 79,904 18,853,163 18,933,067 — Multifamily 7,133 2,339 9,472 8,674,208 8,683,680 — Other commercial 45,379 2,590 47,969 6,784,434 6,832,403 1 Consumer: Residential mortgages 230,850 224,790 455,640 7,782,525 8,238,165 — Home equity loans and lines of credit 37,209 75,668 112,877 5,888,315 6,001,192 — RICs and auto loans - originated 3,092,841 296,085 3,388,926 19,640,740 23,029,666 — RICs and auto loans - purchased 800,993 71,273 872,266 2,596,537 3,468,803 — Personal unsecured loans 89,524 103,698 193,222 2,118,474 2,311,696 93,845 Other consumer 31,980 20,386 52,366 743,012 795,378 — Total $ 4,404,130 $ 928,319 $ 5,332,449 $ 83,073,644 $ 88,406,093 $ 93,846 (1) Financing receivables include LHFS. NOTE 4. LOANS AND ALLOWANCE FOR CREDIT LOSSES (continued) Impaired Loans by Class of Financing Receivable Impaired loans are generally defined as all TDRs plus commercial non-accrual loans in excess of $1.0 million . Impaired loans disaggregated by class of financing receivables are summarized as follows: March 31, 2017 Recorded Investment (1) Unpaid Related Average (in thousands) With no related allowance recorded: Commercial: Commercial real estate: Corporate banking $ 82,140 $ 91,678 $ — $ 85,577 Middle market commercial real estate 52,105 75,192 — 56,096 Santander real estate capital 1,182 1,182 — 1,900 Commercial and industrial 72,633 76,705 — 70,384 Multifamily 2,196 3,172 — 6,283 Other commercial 735 735 — 887 Consumer: Residential mortgages 171,106 218,414 — 173,088 Home equity loans and lines of credit 46,872 46,872 — 47,872 RICs and auto loans - originated — — — — RICs and auto loans - purchased 28,138 36,061 — 31,256 Personal unsecured loans (2) 24,382 24,382 — 25,195 Other consumer 20,386 24,702 — 19,861 With an allowance recorded: Commercial: Commercial real estate: Corporate banking 77,692 81,845 22,305 79,066 Middle market commercial real estate 41,805 60,761 9,255 46,038 Santander real estate capital 8,528 8,528 1,240 8,560 Commercial and industrial 251,976 265,864 64,723 234,277 Multifamily 6,973 6,973 1,115 4,952 Other commercial 7,472 7,472 1,276 7,345 Consumer: Residential mortgages 285,786 324,894 38,708 285,208 Home equity loans and lines of credit 50,948 64,228 3,069 50,405 RICs and auto loans - originated 3,723,717 3,800,829 1,048,383 3,497,517 RICs and auto loans - purchased 1,660,016 1,876,086 418,907 1,757,982 Personal unsecured loans 16,961 17,173 7,162 16,910 Other consumer 12,391 16,443 2,316 12,742 Total: Commercial $ 605,437 $ 680,107 $ 99,914 $ 601,365 Consumer 6,040,703 6,450,084 1,518,545 5,918,036 Total $ 6,646,140 $ 7,130,191 $ 1,618,459 $ 6,519,401 (1) Recorded investment includes deferred loan fees, net of deferred origination costs and unamortized purchase premiums, net of discounts as well as purchase accounting adjustments. (2) Includes LHFS. NOTE 4. LOANS AND ALLOWANCE FOR CREDIT LOSSES (continued) The Company recognized interest income, not including the impact of purchase accounting adjustments, of $240.9 million for the three-month period ended March 31, 2017 on approximately $4.7 billion of TDRs that were returned to performing status as of March 31, 2017 . December 31, 2016 Recorded Investment (1) Unpaid Related Average (in thousands) With no related allowance recorded: Commercial: Commercial real estate: Corporate banking $ 89,014 $ 106,212 $ — $ 93,495 Middle market commercial real estate 60,086 83,173 — 69,206 Santander real estate capital 2,618 2,618 — 2,717 Commercial and industrial 68,135 74,034 — 40,163 Multifamily 10,370 11,127 — 9,919 Other commercial 1,038 1,038 — 639 Consumer: Residential mortgages 175,070 222,142 — 160,373 Home equity loans and lines of credit 48,872 48,872 — 39,976 RICs and auto loans - originated — — — 8 RICs and auto loans - purchased 34,373 44,296 — 55,036 Personal unsecured loans (2) 26,008 26,008 — 19,437 Other consumer 19,335 23,864 — 15,915 With an allowance recorded: Commercial: Corporate banking 80,440 85,309 21,202 71,667 Middle market commercial real estate 50,270 66,059 12,575 44,158 Santander real estate capital 8,591 8,591 890 4,623 Commercial and industrial 216,578 232,204 57,855 166,999 Multifamily 2,930 2,930 876 4,292 Other commercial 7,218 7,218 5,198 5,217 Consumer: Residential mortgages 284,630 324,188 38,764 303,845 Home equity loans and lines of credit 49,862 63,775 3,467 60,855 RICs and auto loans - originated 3,271,316 3,332,297 997,169 2,298,646 RICs and auto loans - purchased 1,855,948 2,097,520 471,687 2,155,028 Personal unsecured loans 16,858 17,126 6,846 9,349 Other consumer 13,093 17,253 2,442 15,878 Total: Commercial $ 597,288 $ 680,513 $ 98,596 $ 513,095 Consumer 5,795,365 6,217,341 1,520,375 5,134,346 Total $ 6,392,653 $ 6,897,854 $ 1,618,971 $ 5,647,441 (1) Recorded investment includes deferred loan fees, net of deferred origination costs and unamortized purchase premiums, net of discounts as well as purchase accounting adjustments. (2) Includes LHFS. The Company recognized interest income of $657.5 million for the year ended December 31, 2016 on approximately $5.2 billion of TDRs that were returned to performing status as of December 31, 2016 . NOTE 4. LOANS AND ALLOWANCE FOR CREDIT LOSSES (continued) Commercial Lending Asset Quality Indicators Commercial credit quality disaggregated by class of financing receivables is summarized according to standard regulatory classifications as follows: PASS. Asset is well-protected by the current net worth and paying capacity of the obligor or guarantors, if any, or by the fair value less costs to acquire and sell any underlying collateral in a timely manner. SPECIAL MENTION. Asset has potential weaknesses that deserve management’s close attention, which, if left uncorrected, may result in deterioration of the repayment prospects for an asset at some future date. Special mention assets are not adversely classified. SUBSTANDARD. Asset is inadequately protected by the current net worth and paying capacity of the obligor or by the collateral pledged, if any. A well-defined weakness or weaknesses exist that jeopardize the liquidation of the debt. The loans are characterized by the distinct possibility that the Company will sustain some loss if deficiencies are not corrected. DOUBTFUL. Exhibits the inherent weaknesses of a substandard credit. Additional characteristics exist that make collection or liquidation in full highly questionable and improbable, on the basis of currently known facts, conditions and values. Possibility of loss is extremely high, but because of certain important and reasonable specific pending factors which may work to the advantage and strengthening of the credit, an estimated loss cannot yet be determined. LOSS. Credit is considered uncollectible and of such little value that it does not warrant consideration as an active asset. There may be some recovery or salvage value, but there is doubt as to whether, how much or when the recovery would occur. Commercial loan credit quality indicators by class of financing receivables are summarized as follows: March 31, 2017 Corporate Middle Santander Commercial and industrial Multifamily Remaining Total (1) (in thousands) Rating: Pass $ 3,093,468 $ 4,900,103 $ 1,128,619 $ 16,108,106 $ 8,291,861 $ 6,692,843 $ 40,215,000 Special Mention 174,765 138,376 24,719 691,575 130,534 24,145 1,184,114 Substandard 212,428 137,221 19,520 479,397 40,069 29,647 918,282 Doubtful 24,431 30,276 — 43,621 — 82 98,410 Total commercial loans $ 3,505,092 $ 5,205,976 $ 1,172,858 $ 17,322,699 $ 8,462,464 $ 6,746,717 $ 42,415,806 (1) Financing receivables include LHFS. December 31, 2016 Corporate Middle Santander Commercial and industrial Multifamily Remaining Total (1) (in thousands) Rating: Pass $ 3,303,428 $ 4,843,468 $ 1,170,259 $ 17,865,871 $ 8,515,866 $ 6,804,184 $ 42,503,076 Special Mention 144,125 136,989 44,281 541,828 120,731 10,651 998,605 Substandard 226,206 161,962 23,822 503,185 47,083 11,932 974,190 Doubtful 19,350 38,153 — 22,183 — 5,636 85,322 Total commercial loans $ 3,693,109 $ 5,180,572 $ 1,238,362 $ 18,933,067 $ 8,683,680 $ 6,832,403 $ 44,561,193 (1) Financing receivables include LHFS. NOTE 4. LOANS AND ALLOWANCE FOR CREDIT LOSSES (continued) Consumer Lending Asset Quality Indicators-Credit Score Consumer financing receivables for which either an internal or external credit score is a core component of the allowance model are summarized by credit score as follows: March 31, 2017 December 31, 2016 Credit Score Range (2) RICs and auto loans (3) Percent RICs and auto loans (3) Percent (dollars in thousands) No FICO ®(1) $ 4,594,478 17.4 % $ 4,154,228 15.7 % <600 13,870,322 52.3 % 14,100,215 53.2 % 600-639 4,474,020 16.9 % 4,597,541 17.4 % >=640 3,540,719 13.4 % 3,646,485 13.7 % Total $ 26,479,539 100.0 % $ 26,498,469 100.0 % (1) Consists primarily of loans for which credit scores are not considered in the ALLL model. (2) Credit scores updated quarterly. (3) RICs and auto loans include $773.1 million and $924.7 million of LHFS at March 31, 2017 and December 31, 2016 that do not have an allowance. Consumer Lending Asset Quality Indicators-FICO ® and Loan-to-Value (“LTV”) Ratio For both residential and home equity loans, loss severity assumptions are incorporated in the loan and lease loss reserve models to estimate loan balances that will ultimately charge-off. These assumptions are based on recent loss experience within various current LTV bands within these portfolios. LTVs are refreshed quarterly by applying Federal Housing Finance Agency Home price index changes at a state-by-state level to the last known appraised value of the property to estimate the current LTV. The Company's ALLL incorporates the refreshed LTV information to update the distribution of defaulted loans by LTV as well as the associated loss given default for each LTV band. Reappraisals on a recurring basis at the individual property level are not considered cost-effective or necessary; however, reappraisals are performed on certain higher risk accounts to support line management activities, default servicing decisions, or when other situations arise for which the Company believes the additional expense is warranted. Residential mortgage and home equity financing receivables by LTV and FICO ® range are summarized as follows: Residential Mortgages (1)(3) March 31, 2017 N/A (2) LTV<=70% 70.01-80% 80.01-90% 90.01-100% 100.01-110% LTV>110% Grand Total FICO ® Score (dollars in thousands) N/A (2) $ 299,444 $ 22,518 $ 15,738 $ 4,435 $ 3,630 $ — $ — $ 345,765 <600 74 249,791 67,644 47,400 29,611 3,899 4,297 402,716 600-639 49 155,608 48,930 39,284 34,524 4,928 5,547 288,870 640-679 153 315,898 99,914 84,830 95,600 5,320 8,635 610,350 680-719 49 529,557 211,825 134,939 141,692 5,622 11,651 1,035,335 720-759 16 842,347 397,595 160,548 152,397 8,308 13,715 1,574,926 >=760 516 2,491,175 857,462 229,408 184,825 10,184 16,583 3,790,153 Grand Total $ 300,301 $ 4,606,894 $ 1,699,108 $ 700,844 $ 642,279 $ 38,261 $ 60,428 $ 8,048,115 (1) Includes LHFS. (2) Residential mortgages and home equity loans and lines of credit in the "N/A" range for LTV or FICO ® score primarily represent the balance on loans serviced by others, in run-off portfolios or for which a current LTV or FICO ® score is unavailable. (3) Allowance model considers LTV for financing receivables in first lien position for the Company and combined LTV ("CLTV") for financing receivables in second lien position for the Company. NOTE 4. LOANS AND ALLOWANCE FOR CREDIT LOSSES (continued) Home Equity Loans and Lines of Credit (2) March 31, 2017 N/A (1) LTV<=70% 70.01-90% 90.01-110% LTV>110% Grand Total FICO ® Score (dollars in thousands) N/A (1) $ 166,218 $ 338 $ 12 $ — $ — $ 166,568 <600 9,696 165,358 66,917 16,409 13,164 271,544 600-639 7,033 148,208 71,034 11,296 9,047 246,618 640-679 7,464 266,495 145,082 25,999 15,754 460,794 680-719 8,942 461,925 272,541 38,428 20,930 802,766 720-759 10,061 647,477 384,010 43,253 25,126 1,109,927 >=760 19,283 1,784,699 933,309 94,962 50,870 2,883,123 Grand Total $ 228,697 $ 3,474,500 $ 1,872,905 $ 230,347 $ 134,891 $ 5,941,340 (1) Residential mortgages and home equity loans and lines of credit in the "N/A" range for LTV or FICO ® score primarily represent the balance on loans serviced by others, in run-off portfolios or for which a current LTV or FICO ® score is unavailable. (2) Allowance model considers LTV for financing receivables in first lien position for the Company and CLTV for financing receivables in second lien position for the Company. Residential Mortgages (1)(3) December 31, 2016 N/A (2) LTV<=70% 70.01-80% 80.01-90% 90.01-100% 100.01-110% LTV>110% Grand Total FICO ® Score (dollars in thousands) N/A (2) $ 696,730 $ 102,911 $ 4,635 $ 2,327 $ 196 $ 150 $ — $ 806,949 <600 80 228,794 70,793 49,253 30,720 6,622 5,885 392,147 600-639 147 152,728 48,006 42,443 42,356 4,538 6,675 296,893 640-679 98 283,054 101,495 81,669 93,552 5,287 4,189 569,344 680-719 112 487,257 193,351 136,937 146,090 6,766 11,795 982,308 720-759 56 767,192 348,524 163,163 178,264 8,473 16,504 1,482,176 >=760 495 2,415,542 860,582 219,014 180,841 11,134 20,740 3,708,348 Grand Total $ 697,718 $ 4,437,478 $ 1,627,386 $ 694,806 $ 672,019 $ 42,970 $ 65,788 $ 8,238,165 (1) Includes LHFS. (2) Residential mortgages and home equity loans and lines of credit in the "N/A" range for LTV or FICO ® score primarily represent the balance on loans serviced by others, in run-off portfolios or for which a current LTV or FICO ® score is unavailable. (3) Allowance model considers LTV for financing receivables in first lien position for the Company and CLTV for fina

OPERATING LEASE ASSETS, NET

OPERATING LEASE ASSETS, NET	3 Months Ended
	Mar. 31, 2017
Leases [Abstract]
OPERATING LEASE ASSETS, NET	OPERATING LEASE ASSETS, NET The Company has operating leases which are included in the Company's Condensed Consolidated Balance Sheets as Operating leases, net. The leased vehicle portfolio consists primarily of leases originated under the Chrysler Agreement. Operating lease assets, net consisted of the following as of March 31, 2017 and December 31, 2016 : March 31, 2017 December 31, 2016 (in thousands) Leased vehicles $ 13,641,234 $ 13,603,494 Origination fees and other costs 24,156 23,141 Manufacturer subvention payments (1,176,686 ) (1,126,323 ) Leased vehicles, gross 12,488,704 12,500,312 Less: accumulated depreciation (2,752,676 ) (2,811,855 ) Leased vehicles, net $ 9,736,028 $ 9,688,457 Commercial equipment vehicles and aircraft, gross $ 73,041 $ 65,401 Less: accumulated depreciation (9,128 ) (6,635 ) Commercial equipment vehicles and aircraft, net $ 63,913 $ 58,766 Total operating lease assets, net $ 9,799,941 $ 9,747,223 Periodically, the Company executes bulk sales of leases originated under the Chrysler Capital program. During the three-month periods ended March 31, 2017 and March 31, 2016 , the Company did not execute any bulk sales of leases originated under the Chrysler Capital program. The following summarizes the future minimum rental payments due to the Company as lessor under operating leases as of March 31, 2017 (in thousands): 2017 $ 1,288,754 2018 1,113,314 2019 445,105 2020 28,504 2021 79 Thereafter — Total $ 2,875,756 Lease income was $496.0 million and $420.9 million for the three-month periods ended March 31, 2017 and 2016 , respectively. Lease expense was $358.8 million and $292.8 million for the three-month periods ended March 31, 2017 and 2016 , respectively.

VARIABLE INTEREST ENTITIES

VARIABLE INTEREST ENTITIES	3 Months Ended
	Mar. 31, 2017
Variable Interest Entity and Securitizations [Abstract]
VARIABLE INTEREST ENTITIES	VARIABLE INTEREST ENTITIES Variable Interest Entities ("VIEs") The Company transfers RICs and leased vehicles into newly formed securitization trusts ("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 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 2016 Annual Report on Form 10-K. On-balance sheet VIEs The assets of consolidated VIEs that are included in the Company's Condensed Consolidated Financial Statements , presented based upon the legal transfer of the underlying assets in order to reflect legal ownership, that can be used to settle obligations of the consolidated VIE and the liabilities of these consolidated entities for which creditors (or beneficial interest holders) do not have recourse to our general credit were as follows: March 31, 2017 December 31, 2016 (in thousands) Assets Restricted cash $ 2,437,776 $ 2,087,177 Loans (1) 23,538,934 23,568,066 Operating lease assets, net 8,927,536 8,564,628 Various other assets 705,569 686,253 Total Assets $ 35,609,815 $ 34,906,124 Liabilities Notes payable $ 30,847,859 $ 31,667,976 Various other liabilities 111,075 91,234 Total Liabilities $ 30,958,934 $ 31,759,210 (1) Includes $859.4 million and $1.0 billion of RICs held for sale at March 31, 2017 and December 31, 2016 , respectively. Certain amounts shown above are greater than the amounts shown in the corresponding line items in the accompanying Condensed Consolidated Balance Sheets due to intercompany eliminations between the VIEs and other entities consolidated by the Company. The amounts shown above are also impacted by purchase accounting marks from the Change in Control. For example, for most of its securitizations, the Company retains one or more of the lowest tranches of bonds. Rather than showing investment in bonds as an asset and the associated debt as a liability, these amounts are eliminated in consolidation as required by GAAP. The Company retains servicing responsibility for receivables transferred to the Trusts and receives a monthly servicing fee on the outstanding principal balance. Supplemental fees, such as late charges, for servicing the receivables are reflected in miscellaneous income. As of March 31, 2017 and December 31, 2016 , the Company was servicing $27.4 billion and $ 27.4 billion , respectively, of RICs that have been transferred to consolidated Trusts. The remainder of the Company’s RICs remains unpledged. NOTE 6. VARIABLE INTEREST ENTITIES (continued) Below is a summary of the cash flows received from the on-balance sheet Trusts for the periods indicated: Three-Month Period Ended March 31, 2017 Three-Month Period Ended March 31, 2016 (in thousands) Assets securitized $ 7,646,625 $ 3,657,955 Net proceeds from new securitizations (1) $ 5,576,801 $ 2,702,004 Net proceeds from sale of retained bonds 115,970 — Cash received for servicing fees (2) 208,923 194,365 Net distributions from Trusts (2) 678,229 629,726 Total cash received from Trusts $ 6,579,923 $ 3,526,095 (1) Includes additional advances on existing securitizations. (2) These amounts are not reflected in the accompanying Condensed Consolidated Statements of Cash Flows because the cash flows are between the VIEs and other entities included in the consolidation. Off-balance sheet VIEs During the three-month period ended March 31, 2017 , the Company sold $700.0 million of gross RICs to VIEs in off-balance sheet securitizations for a loss of $2.7 million . The transaction was executed under the new securitization platform-SPAIN, with Santander. Santander will hold eligible vertical interest in notes and certificates of not less than 5% to comply with the DFA risk retention rules. For the three-month period ended March 31, 2016 , the Company executed no off-balance sheet securitization with VIEs in which it has continuing involvement. As of March 31, 2017 and December 31, 2016 , the Company was servicing $2.9 billion and $2.7 billion , respectively, of gross RICs that have been sold in off-balance sheet securitizations and were subject to an optional clean-up call. The portfolio was comprised as follows: March 31, 2017 December 31, 2016 (in thousands) SPAIN $ 666,346 $ — Total serviced for related parties 666,346 — Chrysler Capital securitizations 2,188,452 2,741,101 Other third parties 89,107 — Total serviced for third parties 2,277,559 2,741,101 Total serviced for other portfolio $ 2,943,905 $ 2,741,101 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 the off-balance sheet Trusts for the periods indicated is as follows: Three-Month Period Ended March 31, 2017 Three-Month Period Ended March 31, 2016 (in thousands) Assets securitized (a) $ 700,022 $ — Net proceeds from new securitizations $ 702,319 $ — Cash received for servicing fees 1,398 15,701 Total cash received from Trusts $ 703,717 $ 15,701 (a) Represents the UPB at the time of original securitization.

GOODWILL AND OTHER INTANGIBLES

GOODWILL AND OTHER INTANGIBLES	3 Months Ended
	Mar. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
GOODWILL AND OTHER INTANGIBLES	GOODWILL AND OTHER INTANGIBLES Goodwill The following table presents activity in the Company's goodwill by its reportable segments for the three-month period ended March 31, 2017 : Consumer and Business Banking Commercial Real Estate Commercial Banking Global Corporate Banking SC Santander BanCorp Total (in thousands) Goodwill at December 31, 2016 $ 1,880,303 $ 870,411 $ 542,584 $ 131,130 $ 1,019,960 $ 10,537 $ 4,454,925 Disposals during the period — — — — — — — Additions during the period — — — — — — — Re-allocations during the period — — — — — — — Impairment during the period — — — — — — — Goodwill at March 31, 2017 $ 1,880,303 $ 870,411 $ 542,584 $ 131,130 $ 1,019,960 $ 10,537 $ 4,454,925 The Company, including its Santander BanCorp subsidiary, conducted its annual goodwill impairment tests as of October 1, 2016 using generally accepted valuation methods. After conducting an analysis of the fair value of each reporting unit as of October 1, 2016 , the Company determined that no impairment of goodwill was identified as a result of the annual impairment analyses. Other Intangible Assets The following table details amounts related to the Company's intangible assets subject to amortization for the dates indicated. March 31, 2017 December 31, 2016 Net Carrying Amount Accumulated Amortization Net Carrying Amount Accumulated Amortization (in thousands) Intangibles subject to amortization: Dealer networks $ 455,821 $ (124,179 ) $ 465,625 $ (114,375 ) Chrysler relationship 91,250 (47,500 ) 95,000 (43,750 ) Core deposit intangibles — — — (295,842 ) Trade name 16,800 (1,200 ) 17,100 (900 ) Other intangibles 17,882 (51,649 ) 19,519 (98,492 ) Total intangibles subject to amortization $ 581,753 $ (224,528 ) $ 597,244 $ (553,359 ) At March 31, 2017 and December 31, 2016 , the Company did not have any intangibles not subject to amortization. Amortization expense on intangible assets was $15.5 million and $17.9 million for the three-month periods ended March 31, 2017 and March 31, 2016 , respectively. During 2016, the Company's core deposit intangibles and purchased credit card relationship intangibles associated with its 2006 acquisitions, which were amortized straight-line over a period of ten years , became fully amortized. During 2016, $48.5 million of the Company's customer relationships associated with BSI became fully amortized. NOTE 7. GOODWILL AND OTHER INTANGIBLES (continued) The estimated aggregate amortization expense related to intangibles, excluding any impairment charges, for each of the five succeeding calendar years ending December 31 is: Year Calendar Year Amount Recorded To Date Remaining Amount To Record (in thousands) 2017 $ 61,491 $ 15,491 $ 46,000 2018 60,644 — 60,644 2019 58,975 — 58,975 2020 58,642 — 58,642 2021 55,603 — 55,603 Thereafter 301,889 — 301,889

OTHER ASSETS

OTHER ASSETS	3 Months Ended
	Mar. 31, 2017
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
OTHER ASSETS	OTHER ASSETS The following is a detail of items that comprise other assets at March 31, 2017 and December 31, 2016 : March 31, 2017 December 31, 2016 (in thousands) Income tax receivables $ 296,305 $ 294,796 Derivative assets at fair value 407,568 413,779 Other repossessed assets 180,288 177,592 MSRs 153,114 150,343 Prepaid expenses 171,836 172,559 OREO 117,845 116,705 Miscellaneous assets and receivables 1,023,530 567,327 Total other assets $ 2,350,486 $ 1,893,101 Income tax receivables Income tax receivables consists primarily of accrued federal tax receivables. Derivative assets at fair value Derivative assets at fair value represent the net amount of derivatives presented in the Condensed Consolidated Financial Statements , including the impact of amounts offsetting recognized assets. Refer to the offsetting of financial assets table in Note 11 to these Condensed Consolidated Financial Statements for the detail of these amounts. MSRs Residential real estate The Company maintains an MSR asset for sold residential real estate loans serviced for others. At March 31, 2017 and December 31, 2016 the balance of these loans serviced for others accounted for at fair value was $15.5 billion and $15.4 billion , respectively. The Company accounts for a majority of its residential MSRs using the FVO. Changes in fair value are recorded through the Mortgage banking income, net line of the Condensed Consolidated Statements of Operations . The fair value of the MSRs at March 31, 2017 and December 31, 2016 was $149.5 million and $146.6 million , respectively. See further discussion on the valuation of the MSRs in Note 16 . As deemed appropriate, the Company economically hedges MSRs using interest rate swaps and forward contracts to purchase MBS. See further discussion on these derivative activities in Note 11 to these Condensed Consolidated Financial Statements . The remainder of MSRs not accounted for using the FVO are accounted for at lower of cost or market. NOTE 8. OTHER ASSETS (continued) For the three-month periods ended March 31, 2017 and March 31, 2016 the Company recorded net changes in the fair value of MSRs due to valuation totaling $1.5 million and $(14.4) million , respectively. The following table presents a summary of activity for the Company's residential MSRs that are included in the Condensed Consolidated Balance Sheets . Three-Month Period Ended March 31, 2017 March 31, 2016 (in thousands) Fair value at beginning of period (1) $ 146,589 $ 147,233 Mortgage servicing assets recognized 5,730 3,592 Principal reductions (4,321 ) (5,726 ) Change in fair value due to valuation assumptions 1,457 (14,356 ) Fair value at end of period (1) $ 149,455 $ 130,743 (1) The Company has total MSRs of $153.1 million and $150.3 million as of March 31, 2017 , and December 31, 2016 , respectively. The Company has elected to account for the majority of its MSR balance using the fair value option, while the remainder of the MSRs are accounted for using the lower of cost or market and are not presented within this table. Fee income and gain on sale of mortgage loans Included in Mortgage banking income, net on the Condensed Consolidated Statements of Operations was mortgage servicing fee income of $10.6 million and $10.8 million for the three-month periods ended March 31, 2017 and March 31, 2016 , respectively. The Company had gains on sales of mortgage loans included in Mortgage banking income, net on the Condensed Consolidated Statements of Operations of $4.4 million and $3.5 million the three-month periods ended March 31, 2017 and March 31, 2016 , respectively. Other repossessed assets and OREO Other repossessed assets primarily consist of SC's vehicle inventory, which is obtained through repossession. OREO consists primarily of the Bank's foreclosed properties. Miscellaneous assets and receivables Miscellaneous assets and receivables includes subvention receivables in connection with the Chrysler Agreement, investment and capital market receivables, and unapplied payments. The first quarter increase is due to a receivable for unsettled trades of Brazilian government bonds of $434.1 million in SIS at March 31, 2017.

DEPOSITS AND OTHER CUSTOMER ACC

DEPOSITS AND OTHER CUSTOMER ACCOUNTS	3 Months Ended
	Mar. 31, 2017
Deposits [Abstract]
DEPOSITS AND OTHER CUSTOMER ACCOUNTS	DEPOSITS AND OTHER CUSTOMER ACCOUNTS Deposits and other customer accounts are summarized as follows: March 31, 2017 December 31, 2016 Balance Percent of total deposits Balance Percent of total deposits (in thousands) Interest-bearing demand deposits $ 11,474,772 17.3 % $ 11,284,881 16.8 % Non-interest-bearing demand deposits 15,608,348 23.4 % 15,413,609 22.9 % Savings 6,090,884 9.1 % 5,988,852 8.9 % Customer repurchase accounts 819,783 1.2 % 868,544 1.3 % Money market 24,977,919 37.5 % 24,511,906 36.5 % Certificates of deposit ("CDs") 7,629,528 11.5 % 9,172,898 13.6 % Total Deposits (1) $ 66,601,234 100.0 % $ 67,240,690 100.0 % (1) Includes foreign deposits, as defined by the FRB, of $10.3 billion and $10.7 billion at March 31, 2017 and December 31, 2016 , respectively. Deposits collateralized by investment securities, loans, and other financial instruments totaled $2.9 billion and $3.0 billion at March 31, 2017 and December 31, 2016 , respectively. Demand deposit overdrafts that have been reclassified as loan balances were $55.8 million and $61.1 million at March 31, 2017 and December 31, 2016 , respectively.

BORROWINGS

BORROWINGS	3 Months Ended
	Mar. 31, 2017
Debt Disclosure [Abstract]
BORROWINGS	BORROWINGS Total borrowings and other debt obligations at March 31, 2017 were $41.5 billion , compared to $43.5 billion at December 31, 2016 . The Company's debt agreements impose certain limitations on dividends other payments and transactions. The Company is currently in compliance with these limitations. Periodically, as part of the Company's wholesale funding management, it opportunistically repurchases outstanding borrowings in the open market and subsequently retires the obligations. During the three-month period ended March 31, 2017 , the Company repurchased $881.0 million of the Bank's 2.00% senior notes due 2018 and senior floating rate notes due 2018. The repurchases resulted in a loss on debt extinguishment of $6.7 million . The Company did no t repurchase any outstanding borrowings in the open market during the three-month period ended and March 31, 2016 . On March 27, 2017, the Company issued $1.0 billion in aggregate principal amount of its 3.70% senior notes due March 2022. The proceeds of this note will be used for general corporate purposes. Additionally, on April 13, 2017, the Company issued $388.7 million in aggregate principal amount of its senior floating rate notes. These senior floating rate notes have a floating rate equal to the three-month LIBOR plus 100 basis points with a maturity of July 2019. The proceeds of this note will be used for general corporate purposes. NOTE 10. BORROWINGS (continued) Parent Company & other IHC Entities Borrowings and Debt Obligations The following table presents information regarding the Parent Company & other IHC entities' borrowings and other debt obligations at the dates indicated: March 31, 2017 December 31, 2016 Balance Effective Rate Balance Effective Rate (dollars in thousands) Senior notes, due November 2017 (1) $ 599,392 2.59 % $ 599,206 2.67 % 3.45% senior notes, due August 2018 498,809 3.62 % 498,604 3.62 % 2.70% senior notes, due May 2019 997,489 2.82 % 997,207 2.82 % 2.65% senior notes, due April 2020 995,060 2.82 % 994,672 2.82 % 3.70% senior notes, due March 2022 994,651 3.82 % — — % 4.50% senior notes, due July 2025 1,095,077 4.57 % 1,094,955 4.56 % Junior subordinated debentures - Capital Trust VI, due June 2036 69,804 7.91 % 69,798 7.91 % Common securities - Capital Trust VI 10,000 7.91 % 10,000 7.91 % Junior subordinated debentures - Capital Trust IX, due July 2036 149,440 2.84 % 149,434 2.49 % Common securities - Capital Trust IX 4,640 2.84 % 4,640 2.49 % Overnight funds purchase, due April 2017 (2,3) 770 0.81 % 830 0.50 % 2.00% subordinated debt, maturing through 2042 (2) 40,498 2.00 % 40,457 2.00 % Short-term borrowings, due April 2017 (2,3) 91,000 0.88 % 54,000 0.63 % Overnight borrowings, maturing April 2017 (2) 31,000 0.88 % 17,000 0.63 % Short-term borrowings, maturing in less than one year (2) 93,378 0.25 % 207,173 0.25 % Short-term borrowings, maturing in less than one year (2) 3,260 0.35 % — — % Total Parent Company & other subsidiaries` borrowings and other debt obligations $ 5,674,268 3.36 % $ 4,737,976 3.21 % (1) These notes bear interest at a rate equal to three-month LIBOR plus 145 basis points per annum. (2) These debt instruments have been entered into by certain of the SHUSA`s subsidiaries. (3) At December 31, 2016, these amounts were due in January 2017. In January 2017, they were refinanced with a new maturity of April 2017. NOTE 10. BORROWINGS (continued) Bank Borrowings and Debt Obligations The following table presents information regarding the Bank's borrowings and other debt obligations at the dates indicated: March 31, 2017 December 31, 2016 Balance Effective Rate Balance Effective Rate (dollars in thousands) 2.00% senior notes, due January 2018 $ 76,908 2.24 % $ 748,143 2.24 % Senior notes, due January 2018 (1)(2) 41,877 1.95 % 249,705 1.99 % 8.750% subordinated debentures, due May 2018 499,069 8.92 % 498,882 8.92 % Subordinated term loan, due February 2019 116,326 7.01 % 122,313 6.78 % FHLB advances, maturing through July 2019 4,350,000 1.15 % 5,950,000 0.85 % Real estate investment trust preferred, due May 2020 156,842 13.36 % 156,457 13.46 % Subordinated term loan, due August 2022 29,296 8.77 % 29,202 8.35 % Total Bank borrowings and other debt obligations $ 5,270,318 2.44 % $ 7,754,702 1.92 % (1) These notes will bear interest at a rate equal to three-month LIBOR plus 93 basis points per annum. (2) Effective rate of this debt is a proxy to account for the portion of this debt that was repurchased following a tender offer which settled on March 29, 2017. The Bank had outstanding irrevocable letters of credit totaling $0.7 billion from the FHLB of Pittsburgh at March 31, 2017 , used to secure uninsured deposits placed with the Bank by state and local governments and their political subdivisions. NOTE 10. BORROWINGS (continued) Revolving Credit Facilities The following tables present information regarding SC's credit facilities as of March 31, 2017 and December 31, 2016 : March 31, 2017 Balance Committed Amount (6) Effective Rate Assets Pledged Restricted Cash Pledged (dollars in thousands) Warehouse line, maturing on various dates (1) $ 232,045 $ 1,250,000 3.73 % $ 326,912 $ 11,207 Warehouse line, due August 2018 (2) 216,520 780,000 3.30 % 281,270 6,946 Warehouse line, due August 2018 (3) 2,018,143 3,120,000 2.29 % 3,067,595 64,912 Warehouse line, due October 2018 (5) 435,477 1,800,000 3.31 % 620,916 10,000 Warehouse line, due October 2018 132,365 400,000 2.91 % 189,416 2,671 Warehouse line, due January 2018 168,084 500,000 2.84 % 213,200 — Warehouse line, due November 2018 301,199 1,000,000 2.51 % 451,750 7,902 Warehouse line, due November 2018 174,720 500,000 2.16 % 186,481 4,722 Warehouse line, due October 2017 273,800 300,000 2.44 % 322,183 10,803 Warehouse line, due July 2018 235,784 250,000 3.25 % 500,095 44,377 Repurchase facility, due December 2017 (4) 328,608 328,608 3.32 % — 14,012 Repurchase facility, due April 2017 (4) 235,509 235,509 2.04 % — — Repurchase facility, due March 2018 (4) 147,182 147,182 3.31 % — — Repurchase facility, due April 2017 (4) 59,202 59,202 2.09 % — — Line of credit with related party, due December 2017 (5) 500,000 500,000 3.24 % — — Line of credit with related party, due December 2017 (5) 1,000,000 1,000,000 2.83 % — — Line of credit with related party, due December 2018 (5) — 500,000 3.89 % — — Line of credit with related party, due December 2018 (5) 400,000 1,000,000 3.36 % — — Total SC revolving credit facilities $ 6,858,638 $ 13,670,501 2.78 % $ 6,159,818 $ 177,552 (1) As of March 31, 2017 , half of the outstanding balance on this facility matures in April 2017 and half matures in March 2018. In April 2017, the facilities that matured were extended to March 2019. (2) This line is held exclusively for financing of Chrysler Capital loans. (3) This line is held exclusively for financing of Chrysler Capital leases. (4) These repurchase facilities are collateralized by securitization notes payable retained by SC. No portion of these facilities are unsecured. These facilities have rolling maturities of up to one year . In April 2017, the repurchase facilities that matured were extended to May 2017. (5) These lines are also collateralized by securitization notes payable and residuals retained by SC. As of March 31, 2017 , $1.6 billion of the aggregate outstanding balances on these credit facilities was unsecured. (6) SPAIN Revolving Funding LLC (a subsidiary) established a committed facility of $750 million with the New York branch of Santander ("Santander NY") on April 3, 2017. Borrowings under this facility bear interest at a rate equal to one-month London Interbank Offered Rate ("LIBOR") plus a spread (based on the quality of the collateral for the facility) ranging from 0.60% to 0.90% . The current maturity date of the facility is December 31, 2018. The committed amounts related to this facility are not included within the table above. NOTE 10. BORROWINGS (continued) December 31, 2016 Balance Committed Amount Effective Assets Pledged Restricted Cash Pledged (dollars in thousands) Warehouse line, maturing on various dates (1) $ 462,085 $ 1,250,000 2.52 % $ 653,014 $ 14,916 Warehouse line, due August 2018 (2) 534,220 780,000 1.98 % 608,025 24,520 Warehouse line, due August 2018 (3) 3,119,943 3,120,000 1.91 % 4,700,774 70,991 Warehouse line, due October 2018 (5) 702,377 1,800,000 2.51 % 994,684 23,378 Warehouse line, due October 2018 202,000 400,000 2.22 % 290,867 5,435 Warehouse line, due January 2018 153,784 500,000 3.17 % 213,578 — Warehouse line, due November 2018 578,999 1,000,000 1.56 % 850,758 17,642 Warehouse line, due October 2017 243,100 300,000 2.38 % 295,045 9,235 Warehouse line, due November 2018 — 500,000 2.07 % — — Repurchase facility, due December 2017 (4) 507,800 507,800 2.83 % — 22,613 Repurchase facility, due April 2017 (4) 235,509 235,509 2.04 % — — Line of credit with related party, due December 2017 (5) 1,000,000 1,000,000 2.86 % — — Line of credit with related party, due December 2017 (5) 500,000 500,000 3.04 % — — Line of credit with related party, due December 2018 (5) 175,000 500,000 3.87 % — — Line of credit with related party, due December 2018 (5) 1,000,000 1,000,000 2.88 % — — Total SC revolving credit facilities $ 9,414,817 $ 13,393,309 2.36 % $ 8,606,745 $ 188,730 (1) As of December 31, 2016 , half of the outstanding balance on this facility matures in March 2017 and half matures in March 2018. (2) This line is held exclusively for financing of Chrysler Capital loans. (3) This line is held exclusively for financing of Chrysler Capital leases. (4) These repurchase facilities are collateralized by securitization notes payable retained by SC. No portion of these facilities are unsecured. These facilities have rolling maturities of up to one year . (5) These lines are also collateralized by securitization notes payable and residuals retained by SC. As of December 31, 2016 , $1.3 billion of the aggregate outstanding balances on these credit facilities was unsecured. Secured Structured Financings The following tables present information regarding SC's secured structured financings as of March 31, 2017 and December 31, 2016 : March 31, 2017 Balance Initial Note Amounts Issued Initial Weighted Average Interest Rate Range Collateral Restricted Cash (dollars in thousands) SC public securitizations, maturing on various dates (1,2) $ 14,797,166 $ 33,958,912 0.89% - 2.80% $ 19,098,090 $ 1,641,484 SC privately issued amortizing notes, maturing on various dates (1) 8,875,308 12,445,241 0.88% - 2.86% 12,881,108 632,753 Total SC secured structured financings $ 23,672,474 $ 46,404,153 0.88% - 2.86% $ 31,979,198 $ 2,274,237 (1) SC has entered into various securitization transactions involving its retail automobile installment loans and leases. These transactions are accounted for as secured financings and therefore both the securitized RICs, and the related securitization debt issued by SPEs, remain on the Condensed Consolidated Balance Sheets . The maturity of this debt is based on the timing of repayments from the securitized assets. (2) Securitizations executed under Rule 144A of the Securities Act are included within this balance. NOTE 10. BORROWINGS (continued) December 31, 2016 Balance Initial Note Amounts Issued Initial Weighted Average Interest Rate Range Collateral Restricted Cash (dollars in thousands) SC public securitizations, maturing on various dates (1,2) $ 13,444,543 $ 32,386,082 0.89% - 2.46% $ 17,474,524 $ 1,423,599 SC privately issued amortizing notes, maturing on various dates (1) 8,172,407 14,085,991 0.88% - 2.86% 12,021,887 500,868 Total SC secured structured financings $ 21,616,950 $ 46,472,073 0.88% - 2.86% $ 29,496,411 $ 1,924,467 (1) SC has entered into various securitization transactions involving its retail automobile installment loans and leases. These transactions are accounted for as secured financings and therefore both the securitized RICs, and the related securitization debt issued by SPEs, remain on the Condensed Consolidated Balance Sheets . The maturity of this debt is based on the timing of repayments from the securitized assets. (2) Securitizations executed under Rule 144A of the Securities Act are included within this balance. Most of SC'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 of 1933, as amended (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 RICs or vehicle leases.

DERIVATIVES

DERIVATIVES	3 Months Ended
	Mar. 31, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract]
DERIVATIVES	DERIVATIVES General The Company uses derivative financial instruments primarily to help manage exposure to interest rate, foreign exchange, equity and credit risk, as well as to reduce the effects that changes in interest rates may have on net income, the fair value of assets and liabilities, and cash flows. The Company also enters into derivatives with customers to facilitate their risk management activities. The Company uses derivative financial instruments as risk management tools and not for speculative trading purposes. The fair value of all derivative balances is recorded within Other assets and Other liabilities on the Condensed Consolidated Balance Sheet . See Note 16 for discussion of the valuation methodology for derivative instruments. Derivatives represent contracts between parties that usually require little or no initial net investment and result in one party delivering cash or another type of asset to the other party based on a notional amount and an underlying as specified in the contract. Derivative transactions are often measured in terms of notional amount, but this amount is generally not exchanged, is not recorded on the balance sheet, and does not represent the Company`s exposure to credit loss. The notional amount is the basis to which the underlying is applied to determine required payments under the derivative contract. The Company controls the credit risk of its derivative contracts through credit approvals, limits and monitoring procedures. The underlying is a referenced interest rate (commonly the Overnight Indexed Swap ("OIS") rate or LIBOR), security price, credit spread or other index. The Company’s capital markets and mortgage banking activities are subject to price risk. The Company employs various tools to measure and manage price risk in its portfolios. In addition, the Board of Directors has established certain limits relative to positions and activities. The level of price risk exposure at any given time depends on the market environment and expectations of future price and market movements and will vary from period to period. NOTE 11. DERIVATIVES (continued) Credit Risk Contingent Features The Company has entered into certain derivative contracts that require the posting of collateral to counterparties when those contracts are in a net liability position. The amount of collateral to be posted is based on the amount of the net liability and thresholds generally related to the Company's long-term senior unsecured credit ratings. In a limited number of instances, counterparties also have the right to terminate their International Swaps and Derivatives Association, Inc. ("ISDA") master agreements if the Company's ratings fall below investment grade. As of March 31, 2017 , derivatives in this category had a fair value of $4.6 million . The credit ratings of the Company and Bank are currently considered investment grade. During the first quarter of 2017 , no additional collateral would be required if there were a further 1 - or 2 - notch downgrade by either Standard & Poor's ("S&P") or Moody's. As of March 31, 2017 and December 31, 2016 , the aggregate fair value of all derivative contracts with credit risk contingent features (i.e. those containing collateral posting or termination provisions based on the Company's ratings) that were in a net liability position totaled $21.5 million and $27.0 million , respectively. The Company had $24.0 million and $28.3 million in cash and securities collateral posted to cover those positions as of March 31, 2017 and December 31, 2016 , respectively. Hedge Accounting Management uses derivative instruments, designated as hedges to mitigate the impact of interest rate movements on the fair value of certain assets and liabilities, and on highly probable forecasted cash flows. These instruments primarily include interest rate swaps that have underlying interest rates based on key benchmark indices and forward sale or purchase commitments. The nature and volume of the derivative instruments used to manage interest rate risk depend on the level and type of assets and liabilities on the balance sheet and the risk management strategies for the current and anticipated interest rate environment. Interest rate swaps are generally used to convert fixed-rate assets and liabilities to variable rate assets and liabilities and vice versa. The Company utilizes interest rate swaps that have a high degree of correlation to the related financial instrument. Cash Flow Hedges The Company has outstanding interest rate swap agreements designed to hedge a portion of the Company’s floating rate assets, and liabilities (including its borrowed funds). All of these swaps have been deemed as highly effective cash flow hedges. The effective portion of the hedging gains and losses associated with these hedges is recorded in AOCI; the ineffective portion of the hedging gains and losses is recorded in earnings. The last of the hedges is scheduled to expire in December 2030 . The Company includes all components of each derivative's gain or loss in the assessment of hedge effectiveness. The earnings impact of the ineffective portion of these hedges was not material for the three-month periods ended March 31, 2017 and 2016 . As of March 31, 2017 , the Company expects $0.7 million of gross losses recorded in accumulated other comprehensive loss to be reclassified to earnings during the subsequent twelve months as the future cash flows occur. Fair Value Hedges During the quarter ended March 31, 2017 , the Company entered into interest rate swaps to hedge the interest rate risk on certain fixed rate loans. These derivatives were designated as fair value hedges at inception. The Company included all components of each derivative's gain or loss in the assessment of hedge effectiveness. The earnings impact of the ineffective portion of these hedges was not material for the three-month period ended March 31, 2017 . Prior to 2017, the Company entered into cross-currency swaps to hedge its foreign currency exchange risk on certain Euro-denominated investments, which were sold during 2016. NOTE 11. DERIVATIVES (continued) Derivatives Designated in Hedge Relationships – Notional and Fair Values Derivatives designated as accounting hedges at March 31, 2017 and December 31, 2016 included: Notional Amount Asset Liability Weighted Average Receive Rate Weighted Average Pay Rate Weighted Average Life (Years) (dollars in thousands) March 31, 2017 Cash flow hedges: Pay fixed — receive floating interest rate swaps $ 7,309,091 $ 57,063 $ 4,593 1.04 % 1.17 % 2.45 Pay variable receive — fixed floating interest rate swaps 3,550,000 739 61,902 1.38 % 0.74 % 3.80 Total $ 10,859,091 $ 57,802 $ 66,495 1.15 % 1.03 % 2.89 December 31, 2016 Cash flow hedges: Pay fixed — receive floating interest rate swaps $ 10,124,172 $ 45,681 $ 59,812 0.91 % 1.03 % 3.01 Total $ 10,124,172 $ 45,681 $ 59,812 0.91 % 1.03 % 3.01 See Note 13 for detail of the amounts included in accumulated other comprehensive income related to derivatives activity. Other Derivative Activities The Company also enters into derivatives that are not designated as accounting hedges under GAAP. The majority of these derivatives are customer-related derivatives relating to foreign exchange and lending arrangements, as well as derivatives to hedge interest rate risk on SC secured structured financings and the borrowings under its revolving credit facilities. SC uses both interest rate swaps and interest rate caps to satisfy these requirements and to hedge the variability of cash flows on securities issued by Trusts and borrowings under its warehouse facilities. In addition, derivatives are used to manage risks related to residential and commercial mortgage banking and investing activities. Although these derivatives are used to hedge risk and are considered economic hedges, they are not designated as accounting hedges because the contracts they are hedging are typically also carried at fair value on the balance sheet, resulting in generally symmetrical accounting treatment for the hedging instrument and the hedged item. Mortgage Banking Derivatives The Company's derivatives portfolio includes mortgage banking interest rate lock commitments, forward sale commitments and interest rate swaps. As part of its overall business strategy, the Company originates fixed-rate residential mortgages. It sells a portion of this production to the FHLMC, the FNMA, and private investors. The Company uses forward sales as a means of hedging against the economic impact of changes in interest rates on the mortgages that are originated for sale and on interest rate lock commitments. The Company typically retains the servicing rights related to residential mortgage loans that are sold. Most of the Company`s residential MSRs are accounted for at fair value. As deemed appropriate, the Company economically hedges MSRs using interest rate swaps and forward contracts to purchase MBS. Customer-related derivatives The Company offers derivatives to its customers in connection with their risk management needs. These financial derivative transactions primarily consist of interest rate swaps, caps, floors and foreign exchange contracts. Risk exposure from customer positions is managed through transactions with other dealers, including Santander. NOTE 11. DERIVATIVES (continued) Other derivative activities The Company uses foreign exchange contracts to manage the foreign exchange risk associated with certain foreign currency-denominated assets and liabilities. Foreign exchange contracts, which include spot and forward contracts as well as cross-currency swaps, represent agreements to exchange the currency of one country for the currency of another country at an agreed-upon price on an agreed-upon settlement date. Exposure to gains and losses on these contracts will increase or decrease over their respective lives as currency exchange and interest rates fluctuate. Other derivative instruments primarily include forward contracts related to certain investment securities sales, an OIS, a total return swap on Visa, Inc. Class B common shares, and equity options, which manage the Company's market risk associated with certain investments and customer deposit products. Derivatives Not Designated in Hedge Relationships – Notional and Fair Values Other derivative activities at March 31, 2017 and December 31, 2016 included: Notional Asset derivatives Fair value Liability derivatives Fair value March 31, 2017 December 31, 2016 March 31, 2017 December 31, 2016 March 31, 2017 December 31, 2016 (in thousands) Mortgage banking derivatives: Forward commitments to sell loans $ 422,087 $ 693,137 $ 2 $ 8,577 $ 2,365 $ — Interest rate lock commitments 205,221 253,568 4,310 2,316 — — Mortgage servicing 295,000 295,000 1,288 838 1,587 1,635 Total mortgage banking risk management 922,308 1,241,705 5,600 11,731 3,952 1,635 Customer related derivatives: Swaps receive fixed 9,430,945 9,646,151 101,579 127,123 56,929 49,642 Swaps pay fixed 9,609,742 9,785,170 95,293 85,877 76,232 97,759 Other 1,551,171 1,611,342 3,834 3,421 2,380 1,989 Total customer related derivatives 20,591,858 21,042,663 200,706 216,421 135,541 149,390 Other derivative activities: Foreign exchange contracts 3,425,931 3,366,483 29,157 56,742 29,967 46,430 Interest rate swap agreements 841,952 1,064,289 3,285 2,075 2,235 2,647 Interest rate cap agreements 10,718,110 9,491,468 104,748 76,387 — — Options for interest rate cap agreements 10,690,797 9,463,935 — — 104,692 76,281 Total return settlement 658,471 658,471 — — 31,123 30,618 Other 1,303,915 1,265,583 13,520 12,293 18,956 16,325 Total $ 49,153,342 $ 47,594,597 $ 357,016 $ 375,649 $ 326,466 $ 323,326 NOTE 11. DERIVATIVES (continued) Gains (Losses) on All Derivatives The following Condensed Consolidated Statement of Operations line items were impacted by the Company’s derivative activities for the three-month periods ended March 31, 2017 and 2016 : Three-Month Period Ended March 31, Derivative Activity (1) Line Item 2017 2016 (in thousands) Fair value hedges: Cross-currency swaps (2) Miscellaneous income $ — $ 174 Interest rate swaps (2) Miscellaneous income — (4,484 ) Cash flow hedges: Pay fixed-receive variable interest rate swaps Net interest income (2,387 ) (2,663 ) Pay variable receive-fixed interest rate swap Net interest income (2,781 ) — Other derivative activities: Forward commitments to sell loans Mortgage banking income (10,940 ) (3,895 ) Interest rate lock commitments Mortgage banking income 1,994 4,452 Mortgage servicing Mortgage banking income 497 15,070 Customer related derivatives Miscellaneous income (1,887 ) 1,594 Foreign exchange Miscellaneous income 2,260 2,063 Interest rate swaps, caps, and options Miscellaneous income 1,204 (5,499 ) Net interest income 4,730 15,139 Total return settlement Other administrative expenses (505 ) (1,316 ) Other Miscellaneous income (1,501 ) (1,131 ) (1) Gains are disclosed as positive numbers while losses are shown as a negative number regardless of the line item being affected. (2) Cross currency swaps designated as hedges matured in the first quarter of 2016 . The Company terminated its fair value interest rate swaps in the third quarter of 2016 . Disclosures about Offsetting Assets and Liabilities The Company enters into legally enforceable master netting agreements, which reduce risk by permitting netting of transactions 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 and in a single currency. The right to offset and certain terms regarding the collateral process, such as valuation, credit events and settlement, are contained in the ISDA master agreement. The Company's financial instruments, including resell and repurchase agreements, securities lending arrangements, derivatives and cash collateral, may be eligible for offset on its Condensed Consolidated Balance Sheet . 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 agreements for all trades executed after April 1, 2013. 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. Prior to April 1, 2013, the Company had elected to net all caps, floors, and interest rate swaps when it had an ISDA agreement with the counterparty. The collateral received or pledged in connection with these transactions is disclosed within the “Gross amounts offset in the Condensed Consolidated Balance Sheet " section of the tables below. NOTE 11. DERIVATIVES (continued) Information about financial assets and liabilities that are eligible for offset on the Condensed Consolidated Balance Sheet as of March 31, 2017 and December 31, 2016 , respectively, is presented in the following tables: Offsetting of Financial Assets Gross Amounts Not Offset in the Condensed Consolidated Balance Sheet Gross Amounts of Recognized Assets Gross Amounts Offset in the Condensed Consolidated Balance Sheet Net Amounts of Assets Presented in the Condensed Consolidated Balance Sheet Financial Instruments Cash Collateral Received Net Amount (in thousands) March 31, 2017 Cash flow hedges $ 57,802 $ — $ 57,802 $ — $ 9,515 $ 48,287 Other derivative activities (1) 352,706 7,250 345,456 5,005 31,262 309,189 Total derivatives subject to a master netting arrangement or similar arrangement 410,508 7,250 403,258 5,005 40,777 357,476 Total derivatives not subject to a master netting arrangement or similar arrangement (2) 4,310 — 4,310 — — 4,310 Total Derivative Assets $ 414,818 $ 7,250 $ 407,568 $ 5,005 $ 40,777 $ 361,786 December 31, 2016 Cash flow hedges $ 45,681 $ — $ 45,681 $ — $ 21,690 $ 23,991 Other derivative activities (1) 374,052 7,551 366,501 4,484 39,474 322,543 Total derivatives subject to a master netting arrangement or similar arrangement 419,733 7,551 412,182 4,484 61,164 346,534 Total derivatives not subject to a master netting arrangement or similar arrangement (2) 1,597 — 1,597 — — 1,597 Total Derivative Assets $ 421,330 $ 7,551 $ 413,779 $ 4,484 $ 61,164 $ 348,131 (1) Includes customer-related and other derivatives. (2) Includes mortgage banking derivatives. NOTE 11. DERIVATIVES (continued) Offsetting of Financial Liabilities Gross Amounts Not Offset in the Condensed Consolidated Balance Sheet Gross Amounts of Recognized Liabilities Gross Amounts Offset in the Condensed Consolidated Balance Sheet Net Amounts of Liabilities Presented in the Condensed Consolidated Balance Sheet Cash Collateral Pledged Net Amount (in thousands) March 31, 2017 Cash flow hedges $ 66,495 $ — $ 66,495 $ 120,105 $ (53,610 ) Other derivative activities (1) 295,343 33,399 261,944 105,553 156,391 Total derivatives subject to a master netting arrangement or similar arrangement 361,838 33,399 328,439 225,658 102,781 Total derivatives not subject to a master netting arrangement or similar arrangement (2) 31,123 — 31,123 — 31,123 Total Derivative Liabilities $ 392,961 $ 33,399 $ 359,562 $ 225,658 $ 133,904 December 31, 2016 Cash flow hedges $ 59,812 $ — $ 59,812 $ 110,856 $ (51,044 ) Other derivative activities (1) 292,708 34,197 258,511 95,138 163,373 Total derivatives subject to a master netting arrangement or similar arrangement 352,520 34,197 318,323 205,994 112,329 Total derivatives not subject to a master netting arrangement or similar arrangement (2) 30,618 — 30,618 — 30,618 Total Derivative Liabilities $ 383,138 $ 34,197 $ 348,941 $ 205,994 $ 142,947 (1) Includes customer-related and other derivatives. (2) Includes mortgage banking derivatives.

INCOME TAXES

INCOME TAXES	3 Months Ended
	Mar. 31, 2017
Income Tax Disclosure [Abstract]
INCOME TAXES	INCOME TAXES An income tax provision of $78.9 million was recorded for the three-month period ended March 31, 2017 , and was also $78.9 million for the corresponding period in 2016 . This resulted in an effective tax rate ("ETR") of 32.5% for the three-month period ended March 31, 2017 , compared to 41.8% for the corresponding period in 2016 . The Company recognized a discrete income tax benefit of $7.4 million for the three-month period ended March 31, 2017 and a discrete income tax provision of $5.7 million for the three-month period ended March 31, 2016 , which resulted in the lower ETR for the three-month period ended March 31, 2017 . NOTE 12. INCOME TAXES (continued) The Company is subject to the income tax laws of the U.S., its states and municipalities and certain foreign countries. These tax laws are complex and are potentially subject to different interpretations by the taxpayer and the relevant governmental taxing authorities. In establishing a provision for income tax expense, the Company must make judgments and interpretations about the application of these inherently complex tax laws. Actual income taxes paid may vary from estimates depending upon changes in income tax laws, actual results of operations, and the final audit of tax returns by taxing authorities. Tax assessments may arise several years after tax returns have been filed. The Company reviews its tax balances quarterly and, as new information becomes available, the balances are adjusted as appropriate. The Company is subject to ongoing tax examinations and assessments in various jurisdictions. The Company filed a lawsuit against the United States in 2009 in Federal District Court in Massachusetts relating to the proper tax consequences of two financing transactions with an international bank through which the Company borrowed $1.2 billion . As a result of these financing transactions, the Company paid foreign taxes of $264.0 million during the years 2003 through 2007 and claimed a corresponding foreign tax credit for foreign taxes paid during those years, which the Internal Revenue Service ("IRS") disallowed. The IRS also disallowed the Company's deductions for interest expense and transaction costs, totaling $74.6 million in tax liability, and assessed penalties and interest totaling approximately $92.5 million . The Company has paid the taxes, penalties and interest associated with the IRS adjustments for all tax years, and the lawsuit will determine whether the Company is entitled to a refund of the amounts paid. On November 13, 2015, the Federal District Court issued a written opinion in favor of the Company on all contested issues, and in a judgment issued on January 13, 2016, ordered amounts assessed by the IRS for the years 2003 through 2005 to be refunded to the Company. The IRS appealed that judgment. On December 15, 2016, the U.S. Court of Appeals for the First Circuit partially reversed the judgment of the Federal District Court. Pursuant to the First Circuit's decision, the Company is not entitled to claim the foreign tax credits it claimed but will be allowed to exclude from income $132.0 million (representing half of the U.K. taxes the Company paid) and will be allowed to claim the interest expense deductions. The First Circuit ordered the case to be remanded to the Federal District Court for further proceedings to determine, among other issues, whether penalties should be sustained. On March 16, 2017, the Company filed a petition requesting the U.S. Supreme Court to hear its appeal of the First Circuit Court's decision. The Supreme Court has yet to decide whether to grant that petition. In response to the First Circuit's decision, the Company, at December 31, 2016, used its previously established $230.1 million tax reserve to write off deferred tax assets and a portion of the receivable that would not be realized under the Court's decision. Additionally, the Company established a $36.0 million tax reserve in relation to items that have not yet been determined by the courts, including potential penalties. Over the next 12 months, it is reasonably possible that changes in the reserve for uncertain tax positions could range from a decrease of $36 million to an increase of $0 million . In 2013, two different federal courts decided cases involving similar financing structures entered into by the Bank of New York Mellon Corp. ("BNY Mellon") and BB&T Corp. ("BB&T") in favor of the IRS. BNY Mellon and BB&T appealed their respective cases. The Court of Appeals in each of the respective cases disallowed the foreign tax credit and allowed the claim for interest deduction. BNY Mellon and BB&T appealed their decisions to the U.S. Supreme Court. On March 7, 2016, the U.S. Supreme Court denied BB&T's and BNY Mellon's petitions. With few exceptions, the Company is no longer subject to federal, state and non-U.S. income tax examinations by tax authorities for years prior to 2003.

ACCUMULATED OTHER COMPREHENSIVE

ACCUMULATED OTHER COMPREHENSIVE INCOME / (LOSS)	3 Months Ended
	Mar. 31, 2017
Equity [Abstract]
ACCUMULATED OTHER COMPREHENSIVE INCOME / (LOSS)	ACCUMULATED OTHER COMPREHENSIVE INCOME / (LOSS) The following table presents the components of accumulated other comprehensive income/(loss), net of related tax, for the three-month period ended March 31, 2017 and 2016 respectively. Total Other Total Accumulated Three-Month Period Ended March 31, 2017 December 31, 2016 March 31, 2017 Pretax Tax Net Activity Beginning Net Ending (in thousands) Change in accumulated losses on cash flow hedge derivative financial instruments $ (2,828 ) $ (1,269 ) $ (4,097 ) Reclassification adjustment for net gains/(losses) on cash flow hedge derivative financial instruments (1) 2,387 (777 ) 1,610 Net unrealized losses on cash flow hedge derivative financial instruments (441 ) (2,046 ) (2,487 ) $ (6,725 ) $ (2,487 ) $ (9,212 ) Change in unrealized gains/(losses) on investment securities available-for-sale 31,479 (10,510 ) 20,969 Reclassification adjustment for net (gains)/losses included in net income/(expense) on non-OTTI securities (2) — — — Reclassification adjustment for net losses/(gains) included in net income/(expense) on OTTI securities (3) — — — Net unrealized gains/(losses) on investment securities available-for-sale 31,479 (10,510 ) 20,969 (130,754 ) 20,969 (109,785 ) Pension and post-retirement actuarial gains/(losses) (4) 913 (428 ) 485 (55,729 ) 485 (55,244 ) As of March 31, 2017 $ 31,951 $ (12,984 ) $ 18,967 $ (193,208 ) $ 18,967 $ (174,241 ) (1) Net gains/(losses) reclassified into Interest on borrowings and other debt obligations in the Condensed Consolidated Statement of Operations for settlements of interest rate swap contracts designated as cash flow hedges. (2) Net (gains)/losses reclassified into Net gain on sale of investment securities sales in the Condensed Consolidated Statement of Operations for the sale of available-for-sale securities. (3) Unrealized gains/(losses) previously recognized in accumulated other comprehensive income on securities for which OTTI was recognized during the period. See further discussion in Note 3 to the Condensed Consolidated Financial Statements . (4) Included in the computation of net periodic pension costs. NOTE 13. ACCUMULATED OTHER COMPREHENSIVE INCOME / (LOSS) (continued) Total Other Total Accumulated Three-Month Period Ended March 31, 2016 December 31, 2015 March 31, 2016 Pretax Tax Net Activity Beginning Net Ending (in thousands) Change in accumulated (losses)/gains on cash flow hedge derivative financial instruments $ (64,196 ) $ 30,260 $ (33,936 ) Reclassification adjustment for net gains/(losses) on cash flow hedge derivative financial instruments (1) 2,663 (1,255 ) 1,408 Net unrealized (losses)/gains on cash flow hedge derivative financial instruments (61,533 ) 29,005 (32,528 ) $ (16,581 ) $ (32,528 ) $ (49,109 ) Change in unrealized gains/(losses) on investment securities available-for-sale 265,939 (104,372 ) 161,567 Reclassification adjustment for net (losses)/gains included in net income/(expense) on non-OTTI securities (2) (26,431 ) 10,387 (16,044 ) Reclassification adjustment for net losses/(gains) included in net income/(expense) on OTTI securities (3) 10 (4 ) 6 Reclassification adjustment for net (gains)/losses included in net income (26,421 ) 10,383 (16,038 ) Net unrealized gains/(losses) on investment securities available-for-sale 239,518 (93,989 ) 145,529 (95,942 ) 145,529 49,587 Pension and post-retirement actuarial gains/(losses) (4) 929 (364 ) 565 (58,007 ) 565 (57,442 ) As of March 31, 2016 $ 178,914 $ (65,348 ) $ 113,566 $ (170,530 ) $ 113,566 $ (56,964 ) (1) Net gains/(losses) reclassified into Interest on borrowings and other debt obligations in the Condensed Consolidated Statement of Operations for settlements of interest rate swap contracts designated as cash flow hedges. (2) Net (gains)/losses reclassified into Net gain on sale of investment securities sales in the Condensed Consolidated Statement of Operations for the sale of available-for-sale securities. (3) Unrealized losses/(gains) previously recognized in accumulated other comprehensive income on securities for which OTTI was recognized during the period. See further discussion in Note 3 to the Condensed Consolidated Financial Statements . (4) Included in the computation of net periodic pension costs.

COMMITMENTS, CONTINGENCIES AND

COMMITMENTS, CONTINGENCIES AND GUARANTEES	3 Months Ended
	Mar. 31, 2017
Commitments and Contingencies Disclosure [Abstract]
COMMITMENTS, CONTINGENCIES AND GUARANTEES	COMMITMENTS, CONTINGENCIES AND GUARANTEES Off-Balance Sheet Risk - Financial Instruments In the normal course of business, the Company utilizes a variety of financial instruments with off-balance sheet risk to meet the financing needs of its customers and manage its exposure to fluctuations in interest rates. These financial instruments include commitments to extend credit, letters of credit, loans sold with recourse, forward contracts, and interest rate and cross currency swaps, caps and floors. These financial instruments may involve, to varying degrees, elements of credit, liquidity, and interest rate risk in excess of the amount recognized on the Condensed Consolidated Balance Sheet . The contractual or notional amounts of these financial instruments reflect the extent of involvement the Company has in particular classes of financial instruments. The Company’s exposure to credit loss in the event of non-performance by the other party to the financial instrument for commitments to extend credit, letters of credit and loans sold with recourse is represented by the contractual amount of those instruments. The Company uses the same credit policies in making commitments and conditional obligations as it does for on-balance sheet instruments. For forward contracts and interest rate swaps, caps and floors, the contract or notional amounts do not represent exposure to credit loss. The Company controls the credit risk of its forward contracts and interest rate swaps, caps and floors through credit approvals, limits and monitoring procedures. See Note 11 to these Condensed Consolidated Financial Statements for discussion of all derivative contract commitments. The following table details the amount of commitments at the dates indicated: Other Commitments March 31, 2017 December 31, 2016 (in thousands) Commitments to extend credit $ 28,240,161 $ 28,889,904 Unsecured revolving lines of credit 30,116 30,547 Letters of credit 1,849,205 2,071,089 Recourse exposure on sold loans 68,564 69,877 Commitments to sell loans 55,627 49,121 Total commitments $ 30,243,673 $ 31,110,538 Commitments to Extend Credit Commitments to extend credit generally have fixed expiration dates, are variable rate, and contain provisions that permit the Company to terminate or otherwise renegotiate the contracts in the event of a significant deterioration in the customer’s credit quality. These arrangements normally require payment of a fee by the customer, the pricing of which is based on prevailing market conditions, credit quality, probability of funding, and other relevant factors. Since many of these commitments are expected to expire without being drawn upon, the contract amounts are not necessarily indicative of future cash requirements. Included within the reported balances for Commitments to extend credit at March 31, 2017 and December 31, 2016 are $6.0 billion and $6.3 billion , respectively, of commitments that can be canceled by the Company without notice. The following table details the amount of commitments to extend credit expiring per period as of the dates indicated: March 31, 2017 December 31, 2016 (in thousands) 1 year or less $ 5,867,806 $ 5,656,552 Over 1 year to 3 years 5,191,572 5,265,685 Over 3 years to 5 years 4,053,421 4,680,057 Over 5 years (1) 13,127,362 13,287,610 Total $ 28,240,161 $ 28,889,904 (1) Includes certain commitments to extend credit that do not have a contractual maturity date, but are expected to be outstanding greater than 5 years . NOTE 14. COMMITMENTS, CONTINGENCIES AND GUARANTEES (continued) Unsecured Revolving Lines of Credit Such commitments, included in the Commitments to extend credit table above, arise primarily from agreements with customers for unused lines of credit on unsecured revolving accounts and credit cards, provided there is no violation of conditions in the underlying agreement. These commitments, substantially all of which the Company can terminate at any time and which do not necessarily represent future cash requirements, are periodically reviewed based on account usage, customer creditworthiness and loan qualifications. Letters of Credit The Company’s letters of credit meet the definition of a guarantee. Letters of credit commit the Company to make payments on behalf of its customers if specified future events occur. The guarantees are primarily issued to support public and private borrowing arrangements. The weighted average term of these commitments at March 31, 2017 is 14.7 months. The credit risk involved in issuing letters of credit is essentially the same as that involved in extending loan facilities to customers. In the event of a requested draw by the beneficiary that complies with the terms of the letter of credit, the Company would be required to honor the commitment. The Company has various forms of collateral for these letters of credit, including real estate assets and other customer business assets. The maximum undiscounted exposure related to these commitments at March 31, 2017 was $1.8 billion . The fees related to letters of credit are deferred and amortized over the life of the respective commitments and were immaterial to the Company’s financial statements at March 31, 2017 . Management believes that the utilization rate of these letters of credit will continue to be substantially less than the amount of the commitments, as has been the Company’s experience to date. As of March 31, 2017 and December 31, 2016 , the liability related to these letters of credit was $8.1 million and $8.1 million , respectively, which is recorded within the reserve for unfunded lending commitments in Other liabilities on the Condensed Consolidated Balance Sheet . The credit risk associated with letters of credit is monitored using the same risk rating system utilized within the loan and financing lease portfolio. Also included within the reserve for unfunded lending commitments at March 31, 2017 and December 31, 2016 were lines of credit outstanding of $112.3 million and $114.4 million , respectively. The following table details the amount of letters of credit expiring per period as of the dates indicated: March 31, 2017 December 31, 2016 (in thousands) 1 year or less $ 1,158,238 $ 1,360,495 Over 1 year to 3 years 595,918 399,866 Over 3 years to 5 years 67,439 283,975 Over 5 years 27,610 26,753 Total $ 1,849,205 $ 2,071,089 Loans Sold with Recourse The Company has loans sold with recourse that meet the definition of a guarantee. For loans sold with recourse under the terms of its multifamily sales program with FNMA, the Company retained a portion of the associated credit risk. The unpaid principal balance outstanding of loans sold in these programs was $288.2 million as of March 31, 2017 and $341.7 million as of December 31, 2016 . As a result of its agreement with FNMA, the Company retained a 100% first loss position on each multifamily loan sold to FNMA until the earlier to occur of (i) the aggregate approved losses on multifamily loans sold to FNMA reaching the maximum loss exposure for the portfolio as a whole of $34.4 million as of March 31, 2017 and $34.4 million as of December 31, 2016 , or (ii) the time when such loans sold to FNMA under this program are fully paid off. Any losses sustained as a result of impediments in standard representations and warranties would be in addition to the maximum loss exposure. NOTE 14. COMMITMENTS, CONTINGENCIES AND GUARANTEES (continued) At the time of the sale, the Company established a liability which represented the fair value of the retained credit exposure and the amount the Company estimates it would have to pay a third party to assume the retained recourse obligation. The estimated liability is calculated as the present value of losses that the portfolio is projected to incur based upon internal specific information and an industry-based default curve with a range of estimated losses. At March 31, 2017 and 2016 , the Company had $3.5 million and $3.8 million , respectively, of reserves classified in Accrued expenses and payables on the Condensed Consolidated Balance Sheets related to the retained credit exposure for loans sold to the FNMA under this program. The Company's commitment will expire in March 2039 based on the maturity of the loans sold with recourse. Losses sustained by the Company may be offset, or partially offset, by proceeds resulting from the disposition of the underlying mortgaged properties. Approval from the FNMA is required for all transactions related to the liquidation of properties underlying the mortgages. Commitments to Sell Loans The Company enters into forward contracts relating to its mortgage banking business to hedge the exposures from commitments to make new residential mortgage loans with existing customers and from mortgage loans classified as LHFS. These contracts mature in less than one year . SC Commitments SC is obligated to make purchase price holdback payments to a third-party originator of auto loans it has purchased, when losses are lower than originally expected. SC also is obligated to make total return settlement payments to this third-party originator in 2017 if returns on the purchased loans are greater than originally expected. These obligations are accounted for as derivatives ( Note 11 ). SC has extended revolving lines of credit to certain auto dealers. Under this arrangement, SC is committed to lend up to each dealer’s established credit limit. At March 31, 2017 and December 31, 2016 , there was an outstanding balance of $3.7 million and $2.5 million , respectively, and a committed amount under these lines of credit of $3.7 million and $2.9 million , respectively. SC is committed to purchase certain new advances on personal revolving financings originated by a third-party retailer, along with existing balances on accounts with new advances, for an initial term ending in April 2020 and renewing through April 2022 at the retailer's option. 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 March 31, 2017 and December 31, 2016 , SC was obligated to purchase $11.3 million and $12.6 million , respectively, in receivables that had been originated by the retailer but not yet purchased by SC. SC also is required to make a profit-sharing payment to the retailer each month if performance exceeds a specified return threshold. During the year ended December 31, 2015, SC and the third-party retailer executed an amendment that, among other provisions, increases the profit-sharing percentage retained by SC, gives the retailer the right to repurchase up to 9.99% of the existing portfolio at any time during the term of the agreement, and, provided that the repurchase right is exercised, gives the retailer the right to retain up to 20% of new accounts subsequently originated. Under terms of an application transfer agreement with an original equipment manufacturer (“OEM") other than FCA, SC has the first opportunity to review for its own portfolio any credit applications turned down by the OEM's captive finance company. The agreement does not require SC to originate any loans, but for each loan originated SC will pay the OEM a referral fee, comprised of a volume bonus fee and a loss betterment bonus fee. The loss betterment bonus fee will be calculated annually and is based on the amount by which losses on loans originated under the agreement are lower than an established percentage threshold. In connection with the sale of RICs through securitizations and other sales, SC has made standard representations and warranties customary to the consumer finance industry. Violations of these representations and warranties may require SC to repurchase loans previously sold to on- or off-balance sheet Trusts or other third parties. As of March 31, 2017 , there were no loans that were the subject of a demand to repurchase or replace for breach of representations and warranties for SC's ABS or other sales. In the opinion of management, the potential exposure of other recourse obligations related to SC’s RIC sales agreements will not have a material adverse effect on SC’s consolidated financial position, results of operations, or cash flows. NOTE 14. COMMITMENTS, CONTINGENCIES AND GUARANTEES (continued) Santander has provided guarantees on the covenants, agreements, and obligations of SC under the governing documents of its warehouse facilities and privately issued amortizing notes. These guarantees are limited to the obligations of SC as servicer. Under terms of the Chrysler Agreement, SC 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. SC had accrued $9.2 million and $10.1 million at March 31, 2017 and December 31, 2016 , respectively, related to these obligations. The Chrysler Agreement requires, among other things, that SC bears 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 SC maintains at least $5.0 billion in funding available for dealer inventory financing 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 SC. The Chrysler Agreement is subject to early termination in certain circumstances, including the failure by either party to comply with certain of its ongoing obligations under the agreement. These obligations include SC's meeting specified escalating penetration rates for the first five years of the agreement. SC has not met these penetration rates at March 31, 2017 . If the Chrysler Agreement were to terminate, there could be a materially adverse impact to our and SC's business financial condition and results of operations. Until January 31, 2017, SC had a flow agreement with Bank of America whereby SC is committed to sell up to a specified amount of eligible loans to the bank each month. On July 27, 2016, SC and Bank of America amended the flow agreement to reduce the maximum commitment to sell eligible loans each month to $300.0 million . On October 27, 2016, Bank of America notified SC that it was terminating the flow agreement effective January 31, 2017 and, accordingly, the flow agreement has terminated. SC 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 the time of sale. Servicer payments are due six years from the cut-off date of each loan sale. SC had accrued $10.8 million and $9.8 million at March 31, 2017 and December 31, 2016 , respectively. SC has sold loans to Citizens Bank of Pennsylvania ("CBP") under terms of a flow agreement and predecessor sale agreements. SC retains servicing on the sold loans and will owe CBP a loss-sharing payment capped at 0.5% of the original pool balance if losses exceed a specified threshold, established on a pool-by-pool basis. On June 25, 2015 , SC executed an amendment to the servicing agreement with CBP, which increased the servicing fee SC receives. SC and CBP also amended the flow agreement which reduced, effective from and after August 1, 2015 , CBP's committed purchases of Chrysler Capital prime loans from a maximum of $600.0 million and a minimum of $250.0 million per quarter to a maximum of $200.0 million and a minimum of $50.0 million per quarter, as may be adjusted according to the agreement. In January 2016, SC executed a further amendment to the servicing agreement with CBP which decreased the servicing fee SC receives on loans sold to CBP by SC under the flow agreement. On February 13, 2017, SC and CBP entered into a mutual agreement to terminate the flow agreement effective May 1, 2017. As of March 31, 2017 , SC is party to a forward flow asset sale agreement with a third party under terms of which SC is committed to sell charged-off loan receivables in bankruptcy status on a quarterly basis until sales total at least $200.0 million in proceeds. On June 29, 2015, SC and the third party executed an amendment to the forward flow asset sale agreement which increased the committed sales of charged off loan receivables in bankruptcy status to $275.0 million . On September 30, 2015, SC and the third party executed a second amendment to the forward flow asset sale agreement, which required sales to occur quarterly. On November 13, 2015, SC and the third party executed a third amendment to the forward flow asset sale agreement which increased the committed sales of charged off loan receivables in bankruptcy status to $350.0 million . However, any sale more than $275.0 million is subject to a market price check. As of March 31, 2017 and December 31, 2016 , the remaining aggregate commitment was $152.1 million and $166.2 million , respectively. Pursuant to the terms of a separation agreement among SC`s former Chief Executive Officer ("CEO") Thomas G. Dundon, SC, DDFS LLC, the Company and Santander, upon satisfaction of applicable conditions, including receipt of required regulatory approvals, SC will owe Mr. Dundon a cash payment of up to $115.1 million . NOTE 14. COMMITMENTS, CONTINGENCIES AND GUARANTEES (continued) Other Off-Balance Sheet Risk Other off-balance sheet risk stems from financial instruments that do not meet the definition of guarantees under applicable accounting guidance, and from other relationships that include items such as indemnifications provided in the ordinary course of business and intercompany guarantees. Legal and Regulatory Proceedings Periodically, the Company is party to, or otherwise involved in, various lawsuits, investigations, regulatory matters 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, investigation, regulatory matter and/or 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. Accordingly, except as provided below, the Company is unable to reasonably estimate its potential exposure, if any, to these lawsuits, investigations, regulatory matters and other legal proceedings at this time. However, 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 have a material adverse effect on the Company's financial position, liquidity, and results of operations. In accordance with applicable accounting guidance, the Company establishes an accrued liability for litigation, investigation, 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, investigation or regulatory matter 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 March 31, 2017 and December 31, 2016 , the Company has accrued aggregate legal and regulatory liabilities of $87.8 million and $98.8 million , respectively. Other Regulatory and Governmental Proceedings OCC Identity Theft Protection Product ("SIP") Matter In 2014, the Bank commenced discussions with the OCC to address concerns that some customers may have paid for but did not receive certain benefits of SIP, an identity theft protection product from the Bank's third-party vendor. In response to those concerns, as of December 31, 2016, the Bank made $37.3 million in total remediation payments to customers. Notwithstanding those payments, on March 26, 2015, the Bank entered into a Consent Cease and Desist Order ("SIP Consent Order") with the OCC regarding identified deficiencies in SBNA's billing practices with regard to SIP. Pursuant to the SIP Consent Order, the Bank paid a civil monetary penalty ("CMP") of $6.0 million and agreed to remediate customers who paid for but may not have received certain benefits of SIP. As indicated above, as of the end of 2014, all customers had been mailed a refund representing the amount paid for product enrollment. Subsequently, the Bank commenced a further review in order to remediate checking account customers who may have been charged an overdraft fee and credit card customers who may have been charged an over limit fee and/or finance charge related to SIP product fees. The approximate amount of the expected additional remediation was $5.2 million . On June 26, 2015, the Bank sent its formal response to the SIP Consent Order and, on October 15, 2015, the OCC responded objecting to the Bank's response and proposed reimbursement and action plans. On December 14, 2015, the Bank re-submitted a revised response and enhanced reimbursement and action plans and, on December 21, 2015, received a notice of non-objection from the OCC. Since that time, the actions and remediation set forth in the action plans are underway as is ongoing quarterly reporting to the OCC. NOTE 14. COMMITMENTS, CONTINGENCIES AND GUARANTEES (continued) CFPB Overdraft Coverage Consent Order On April 1, 2014 , the Bank received a civil investigative demand ("CID") from the CFPB requesting information and documents in connection with the Bank’s marketing to consumers of overdraft coverage for ATM and/or onetime debit card transactions through a third-party vendor. On July 14, 2016, the Bank entered into a consent order with the CFPB regarding the Bank’s overdraft coverage practices for ATM and onetime debit card transactions. Pursuant to the terms of the consent order, the Bank paid a CMP of $10.0 million and agreed to validate the overdraft coverage elections made by customers who opted in to overdraft coverage for automated teller machine ("ATM") and onetime debit card transactions as a result of telemarketing by the third party vendor. The Bank is also required to make certain changes to its third party vendor oversight policy and its customer complaint policy. The Bank is working to meet the consent order requirements. However, it is possible that additional regulatory action could be taken and/or litigation filed as a result of these issues. FIRREA Subpoena On May 22, 2013, the Bank received a subpoena from the U.S. Attorney's Office for the Southern District of New York seeking information regarding claims for foreclosure expenses incurred in connection with the foreclosure of loans insured or guaranteed by the Federal Housing Agency, the FNMA or the FHLMC. The Bank continues to cooperate with the investigation; however, there can be no assurance that claims or litigation will not arise from this matter. There is insufficient information/status to assess a likelihood of fines/penalties or other loss and/or estimates at this time. SC Matters Periodically, SC is party to, or otherwise involved in, various lawsuits and other legal proceedings that arise in the ordinary course of business. On August 26, 2014 , a purported securities class action lawsuit was filed in the United States District Court, Southern District of New York, captioned Steck v. Santander Consumer USA Holdings Inc. et al., No. 1:14-cv-06942 (the "Deka Lawsuit"). On October 6, 2014 , another purported securities class action lawsuit was filed in the District Court of Dallas County, State of Texas, captioned Kumar v. Santander Consumer USA Holdings, et al., No. DC-14-11783, which was subsequently removed to the United States District Court, Northern District of Texas and re-captioned Kumar v. Santander Consumer USA Holdings, et al., No. 3:14-CV-3746 (the "Kumar Lawsuit"). Both the Deka Lawsuit and the Kumar Lawsuit were brought against SC, certain of its current and former directors and executive officers and certain institutions that served as underwriters in SC's initial public offering ("IPO") on behalf of a class consisting of those who purchased or otherwise acquired SC's securities between January 23, 2014 and June 12, 2014. In February 2015, the Kumar Lawsuit was voluntarily dismissed with prejudice. In June 2015, the venue of the Deka Lawsuit was transferred to the United States District Court, Northern District of Texas. In September 2015, the court granted a motion to appoint lead plaintiffs and lead counsel, and the Deka Lawsuit is now captioned Deka Investment GmbH et al. v. Santander Consumer USA Holdings Inc. et al., No. 3:15-cv-2129-K. The amended class action complaint in the Deka Lawsuit alleges that that SC's registration statement and prospectus and certain subsequent public disclosures contained misleading statements concerning SC’s ability to pay dividends and the adequacy of SC’s compliance systems and oversight. The amended complaint asserts claims under Sections 11, 12(a) and 15 of the Securities Act of 1933 and Sections 10(b) and 20(a) of the Exchange Act and Rule 10b-5 promulgated thereunder, and seeks damages and other relief. On December 18, 2015, SC and the individual defendants moved to dismiss the amended class action complaint and on June 13, 2016, the motion to dismiss was denied. On December 2, 2016, the plaintiffs moved to certify the proposed classes and, on February 17, 2017, SC filed an opposition to the plaintiffs' motion to certify the proposed classes, and on March 31, 2017, the plaintiffs filed their reply brief. NOTE 14. COMMITMENTS, CONTINGENCIES AND GUARANTEES (continued) 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 SC’s Board, and names SC 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 SC’s subprime auto lending practices, resulting in harm to SC. The complaint seeks unspecified damages and equitable relief. On December 29, 2015, the Feldman Lawsuit was stayed pending the resolution of the Deka Lawsuit. On March 18, 2016, a purported securities class action lawsuit was filed in the United States District Court, Northern District of Texas, captioned Parmelee v. Santander Consumer USA Holdings Inc. et al., No. 3:16-cv-783 (the Parmelee Lawsuit). On April 4, 2016, another purported securities class action lawsuit was filed in the United States District Court, Northern District of Texas, captioned Benson v. Santander Consumer USA Holdings Inc. et al., No. 3:16-cv-919 (the Benson Lawsuit). Both the Parmelee Lawsuit and the Benson Lawsuit were filed against SC 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 SC's securities between February 3, 2015 and March 15, 2016. On May 25, 2016, the Benson Lawsuit was consolidated into the Parmelee Lawsuit, with the consolidated case captioned as Parmelee v. Santander Consumer USA Holdings Inc. et al., No. 3:16-cv-783. On December 20, 2016, the plaintiffs filed an amended class action complaint. The amended class action complaint in the Parmelee Lawsuit alleges that SC made false or misleading statements, as well as failed to disclose material adverse facts, in prior Annual and Quarterly Reports filed under the Exchange Act and certain other public disclosures, in connection with, among other things, SC’s change in its methodology for estimating its ACL and correction of such allowance for prior periods in, among other public disclosures, SC’s Annual Report on Form 10-K for the year ended December 31, 2015, SC’s Quarterly Report on Form 10-Q for the quarter ended June 30, 2016, and SC’s amended filings for prior reporting periods. The amended class action complaint asserts claims under Sections 10(b) and 20(a) of the Exchange Act, and Rule 10b-5 promulgated thereunder, and seeks damages and other relief. On March 14, 2017, the Company filed a motion to dismiss the Parmelee 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 SC’s Board, and names SC as a nominal defendant. The complaint alleges, among other things, that the defendants breached their fiduciary duties in connection with SC’s accounting practices and controls. The complaint seeks unspecified damages and equitable relief. SC 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 “ECOA”), the Fair Debt Collection Practices Act, the 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. SC 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 Federal Reserve, the CFPB, the Department of Justice ("DOJ"), the Securities and Exchange Commission ("SEC"), the Federal Trade Commission and various state regulatory and enforcement agencies. Currently, such proceedings include, but are not limited to, a civil subpoena from the DOJ, under the Financial Institutions Reform, Recovery and Enforcement Act ("FIRREA"), requesting the production of documents and communications that, among other things, relate to the underwriting and securitization of nonprime auto loans since 2007, and from the SEC requesting the production of documents and communications that, among other things, relate to the underwriting and securitization of nonprime auto loans since 2013. On March 21, 2017, SC and SHUSA entered into a written agreement (the “2017 Written Agreement”) with the FRBB. Under the terms of the 2017 Written Agreement, SC 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 SC’s management and operations. NOTE 14. COMMITMENTS, CONTINGENCIES AND GUARANTEES (continued) In August and September 2014, the Company received civil subpoenas and/or CIDs from the Attorney General of Massachusetts ("the Massachusetts AG") and Delaware Department of Justice ("the Delaware DOJ") under the authority of each state’s consumer protection statutes requesting information and the production of documents related to our underwriting and securitizations of nonprime auto loans. On March 29, 2017, SC entered into an Assurance of Discontinuance ("AOD") with the Massachusetts AG and a Cease and Desist by Agreement ("C&D") with the Delaware DOJ to settle allegations that it facilitated the origination of certain Massachusetts and Delaware loans that it knew - or should have known - were in violation of applicable state consumer protection laws. In the AOD, filed in the Superior Court of Suffolk County, State of Massachusetts, captioned In the Matter of Santander Consumer USA Holdings Inc., C.A. # 17-946E, SC agreed to pay $16.3 million to an independent trust

RELATED PARTY TRANSACTIONS

RELATED PARTY TRANSACTIONS	3 Months Ended
	Mar. 31, 2017
Related Party Transactions [Abstract]
RELATED PARTY TRANSACTIONS	RELATED PARTY TRANSACTIONS The Company has various debt agreements with Santander. For a listing of these debt agreements, see Note 11 to the Condensed Consolidated Financial Statements of the Company's Annual Report on Form 10-K for the year ended December 31, 2016 . The Company and its affiliates also entered into or were subject to various service agreements with Santander and its affiliates. Each of these agreements was made in the ordinary course of business and on market terms. On March 28, 2017, SHUSA received a $9.0 million capital contribution from Santander. On March 29, 2017, SC entered into a Master Securities Purchase Agreement (“MSPA”) with Santander, whereby it 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. SC will provide servicing on all loans originated under this arrangement. For the three months ended March 31, 2017 , SC sold $700.0 million of loans under this agreement and recognized a loss of $2.7 million . The Company had $37.5 million of collections due to Santander as of March 31, 2017 . On July 2, 2015, SC announced the departure of Thomas G. Dundon from his roles as Chairman of the Board and Chief Executive Officer of SC, effective as of the close of business on July 2, 2015. In connection with Mr. Dundon's departure, and subject to the terms and conditions of his employment agreement, including Mr. Dundon's execution of a release of claims against SC, he became entitled to receive certain payments and benefits under his employment agreement. The separation agreement also provided for the modification of terms for certain other equity-based awards. Certain of the payments, agreements to make payments and benefits may be effective only upon receipt of certain required regulatory approvals. NOTE 15. RELATED PARTY TRANSACTIONS (continued) As of March 31, 2017, SC has not made any payments to Mr. Dundon, nor recorded any liability or obligation arising from or pursuant to the terms of the separation agreement. If all applicable conditions are satisfied, including receipt of required regulatory approvals and satisfaction of any conditions thereto, SC will be obligated to make a cash payment to Mr. Dundon of up to $115.1 million . This amount would be recorded as compensation expense in its Consolidated Statement of Income and Comprehensive Income. The Company entered into an agreement with Mr. Dundon, Dundon DFS LLC ("DDFS"), and Santander related to Mr. Dundon's departure from SC. Pursuant to the separation agreement, the Company was deemed to have delivered an irrevocable notice to exercise its option to acquire all of the 34,598,506 shares of SC Common Stock owned by DDFS and consummate the transactions contemplated by the call option notice, subject to the receipt of all required regulatory approvals (the "Call Transaction"). At that date, the SC Common Stock held by DDFS (the "DDFS Shares") represented approximately 9.7% of SC Common Stock. The separation agreement did not affect Santander’s option to assume the Company’s obligation under the Call Transaction as provided in the Shareholders Agreement that was entered into by the same parties on January 28, 2014. Under the separation agreement, because the Call Transaction was not consummated prior to October 15, 2015 (the “Call End Date”), DDFS is free to transfer any or all of the DDFS shares, subject to the terms and conditions of the Amended and Restated Loan Agreement dated as of July 16, 2014 between DDFS and Santander. In the event the Call Transaction were to be completed after the Call End Date, interest would accrue on the price paid per share in the Call Transaction at the overnight LIBOR rate on the third business day preceding the consummation of the Call Transaction plus 100 basis points with respect to the shares of SC Common Stock that were ultimately sold in the Call Transaction. The Amended and Restated Loan Agreement provides for a $300.0 million revolving loan from Santander to DDFS which, as of March 31, 2017 and December 31, 2016, had an unpaid principal balance of approximately $290.0 million . On April 17, 2017, the loan agreement matured and became due and payable. Pursuant to the Loan Agreement, 29,598,506 shares of the SC’s Common Stock owned by DDFS are pledged as collateral under a related pledge agreement. The Shareholders Agreement further provides that Santander may, at its option, become the direct beneficiary of the Call Option, and Santander has exercised this option. If consummated in full, DDFS LLC would receive $905.4 million plus interest that has accrued since the Call End Date. To date, the Call Transaction has not been consummated. Pursuant to the loan agreement, if at any time the value of SC Common Stock pledged under the Pledge Agreement is less than 150% of the aggregate principal amount outstanding under the loan agreement, DDFS has an obligation to either (a) repay a portion of the outstanding principal amount such that the value of the pledged collateral is equal to at least 200% of the outstanding principal amount, or (b) pledge additional shares of SC Common Stock such that the value of the additional shares of SC Common Stock, together with the 29,598,506 shares already pledged under the Pledge Agreement, is equal to at least 200% of the outstanding principal amount. The value of the pledged collateral is less than 150% of aggregate principal amount outstanding under the loan agreement, and DDFS has not taken any of the collateral posting actions described in clauses (a) or (b) above. Moreover, as noted above, on April 17, 2017, the loan agreement matured and became due and payable on that date. If Santander declares the borrower’s obligations under the loan agreement due and payable as a result of an event of default (including with respect to the collateral posting obligations described above), under the terms of the loan agreement and the Pledge Agreement, Santander’s ability to rely upon the shares of SC Common Stock subject to the Pledge Agreement is, subject to certain exceptions, limited to the right to consummate the Call Transaction at the price specified in the Shareholders Agreement. Because the borrower failed to pay obligations under the loan agreement on April 17, 2017, the borrower is in default and is currently being charged the default rate of interest provided for in the loan agreement. The loan agreement generally defines the default interest rate as the base rate plus 2% . The base rate as defined in the loan agreement is the higher of (1) the federal funds rate plus ½ of 1% or (2) the prime rate, which is the annual rate of interest publicly announced by Santander NY from time to time. As of April 21, 2017, the prime rate as announced by Santander NY was 4% . In connection with, and pursuant to, the separation agreement, on July 2, 2015, DDFS LLC and Santander entered into amendments to the Loan Agreement and the Pledge Agreement that provide, among other things, the outstanding balance under the Loan Agreement will become due and payable upon the consummation of the Call Transaction and that the amount otherwise payable to DDFS under the Call Transaction will be reduced by the amount outstanding under the Loan Agreement, including principal, interest and fees, and further that any net cash proceeds received by DDFS on account of sales of SC Common Stock after the Call End Date are applied to the outstanding balance under the Loan Agreement. NOTE 15. RELATED PARTY TRANSACTIONS (continued) On August 31, 2016, Mr. Dundon, DDFS LLC, SC, Santander and SHUSA entered into a Second Amendment to the Separation Agreement, and Mr. Dundon, DDFS LLC, Santander and SHUSA entered into a Third Amendment to the Shareholders Agreement, whereby the price per share to be paid to DDFS LLC in connection with the Call Transaction was reduced from $26.83 to $26.17 , the arithmetic mean of the daily volume-weighted average price for a share of SC common stock for each of the ten consecutive complete trading days immediately prior to July 2, 2015, the date on which the call option was exercised.

FAIR VALUE

FAIR VALUE	3 Months Ended
	Mar. 31, 2017
Fair Value Disclosures [Abstract]
FAIR VALUE	FAIR VALUE General A portion of the Company’s assets and liabilities are carried at fair value, including available-for-sale ("AFS") investment securities and derivative instruments. In addition, the Company elects to account for its residential mortgages held for sale and a portion of its MSRs at fair value. Fair value is also used on a nonrecurring basis to evaluate certain assets for impairment or for disclosure purposes. Examples of nonrecurring uses of fair value include impairments for certain loans and foreclosed assets. As of March 31, 2017 , $19.4 billion of the Company’s total assets consisted of financial instruments measured at fair value on a recurring basis, including financial instruments for which the Company elected the FVO. Approximately $172.1 million of these financial assets were measured using quoted market prices for identical instruments or Level 1 inputs. Approximately $18.3 billion of these financial assets were measured using valuation methodologies involving market-based and market-derived information, or Level 2 inputs. Approximately $929.7 million of these financial assets were measured using model-based techniques, or Level 3 inputs, and represented approximately 4.8% of total assets measured at fair value and approximately 0.7% of total consolidated assets. Fair value is defined in GAAP as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. The standard focuses on the exit price in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants. GAAP establishes a fair value reporting hierarchy to maximize the use of observable inputs when measuring fair value and defines the three levels of inputs as noted below: • Level 1 - Assets or liabilities for which the identical item is traded on an active exchange, such as publicly-traded instruments. • Level 2 - Assets and liabilities valued based on observable market data for similar instruments. Fair value is estimated using inputs other than quoted prices included within Level 1 that are observable for assets or liabilities, either directly or indirectly. • Level 3 - Assets or liabilities for which significant valuation assumptions are not readily observable in the market, and instruments valued based on the best available data, some of which is internally developed and considers risk premiums that a market participant would require. Fair value is estimated using unobservable inputs that are significant to the fair value of the assets or liabilities. Level 3 assets and liabilities may include financial instruments whose value is determined using pricing services, pricing models with internally developed assumptions, discounted cash flow ("DCF") methodologies, or similar techniques, as well as instruments for which the determination of fair value requires significant management judgment or estimation. Assets and liabilities measured at fair value, by their nature, result in a higher degree of financial statement volatility. When available, the Company uses quoted market prices or matrix pricing in active markets to determine fair value and classifies such items as Level 1 or Level 2 assets or liabilities. If quoted market prices in active markets are not available, fair value is determined using third-party broker quotes and/or DCF models incorporating various assumptions including interest rates, prepayment speeds and credit losses. Assets and liabilities valued using broker quotes and/or DCF models are classified as either Level 2 or Level 3, depending on the lowest level classification of an input that is considered significant to the overall valuation. NOTE 16. FAIR VALUE (continued) The Company values assets and liabilities based on the principal market in which each would be sold (in the case of assets) or transferred (in the case of liabilities). The principal market is the forum with the greatest volume and level of activity. In the absence of a principal market, the valuation is based on the most advantageous market. In the absence of observable market transactions, the Company considers liquidity valuation adjustments to reflect the uncertainty in pricing the instruments. The fair value of a financial asset is measured on a stand-alone basis and cannot be measured as a group, with the exception of certain financial instruments held and managed on a net portfolio basis. In measuring the fair value of a nonfinancial asset, the Company assumes the highest and best use of the asset by a market participant, not just the intended use, to maximize the value of the asset. The Company also considers whether any credit valuation adjustments are necessary based on the counterparty's credit quality. Any models used to determine fair values or validate dealer quotes based on the descriptions below are subject to review and testing as part of the Company's model validation and internal control testing processes. The Bank's Market Risk Department is responsible for determining and approving the fair values of all assets and liabilities valued at fair value, including the Company's Level 3 assets and liabilities. Price validation procedures are performed and the results are reviewed for Level 3 assets and liabilities by the Market Risk Department. Price validation procedures performed for these assets and liabilities can include comparing current prices to historical pricing trends by collateral type and vintage, comparing prices by product type to indicative pricing grids published by market makers, and obtaining corroborating dealer prices for significant securities. The Company reviews the assumptions utilized to determine fair value on a quarterly basis. Any changes in methodologies or significant inputs used in determining fair values are further reviewed to determine if a change in fair value level hierarchy has occurred. Transfers in and out of Levels 1, 2 and 3 are considered to be effective as of the end of the quarter in which they occur. There were no transfers between Levels 1, 2 or 3 during the three-month periods ended March 31, 2017 and 2016 for any assets or liabilities valued at fair value on a recurring basis. NOTE 16. FAIR VALUE (continued) Assets and Liabilities Measured at Fair Value on a Recurring Basis The following tables present the assets and liabilities that are measured at fair value on a recurring basis by major product category and fair value hierarchy as of March 31, 2017 and December 31, 2016 . Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Significant Balance at (in thousands) Financial assets: U.S. Treasury securities $ 169,603 $ 2,133,642 $ — $ 2,303,245 Corporate debt — 210,906 — 210,906 ABS — 180,021 573,454 753,475 Equity securities (1) 563 — — 563 State and municipal securities — 28 — 28 MBS — 15,087,457 — 15,087,457 Total investment securities available-for-sale (1) 170,166 17,612,054 573,454 18,355,674 Trading securities 1,976 17,410 — 19,386 RICs held-for-investment — — 202,473 202,473 LHFS (2) — 242,079 — 242,079 MSRs (3) — — 149,455 149,455 Derivatives: Cash flow — 57,802 — 57,802 Mortgage banking interest rate lock commitments — — 4,310 4,310 Mortgage banking forward sell commitments — — 2 2 Customer related — 200,706 — 200,706 Foreign exchange — 29,157 — 29,157 Mortgage servicing — 1,288 — 1,288 Interest rate swap agreements — 3,285 — 3,285 Interest rate cap agreements — 104,748 — 104,748 Other — 13,520 — 13,520 Total financial assets $ 172,142 $ 18,282,049 $ 929,694 $ 19,383,885 Financial liabilities: Derivatives: Cash flow $ — $ 66,495 $ — $ 66,495 Mortgage banking forward sell commitments — 2,365 — 2,365 Customer related — 135,541 — 135,541 Foreign exchange — 29,967 — 29,967 Mortgage servicing — 1,587 — 1,587 Interest rate swaps — 2,235 — 2,235 Option for interest rate cap — 104,692 — 104,692 Total return settlement — — 31,123 31,123 Other — 18,058 898 18,956 Total financial liabilities $ — $ 360,940 $ 32,021 $ 392,961 (1) Investment securities available-for-sale disclosed on the Condensed Consolidated Balance Sheet at March 31, 2017 includes $10.7 million of equity securities valued using net asset value as a practical expedient that are not presented within this table. (2) LHFS disclosed on the Condensed Consolidated Balance Sheet also includes LHFS that are held at the lower of cost or fair value and are not presented within this table. (3) The Company has total MSRs of $153.1 million as of March 31, 2017 . The Company has elected to account for the majority of its MSR balance using the FVO, while the remainder of the MSRs are accounted for using the lower of cost or fair value and are not presented within this table. NOTE 16. FAIR VALUE (continued) Quoted Prices in Active Significant Other Significant Balance at (in thousands) Financial assets: U.S. Treasury securities $ 224,506 $ 1,632,351 $ — $ 1,856,857 ABS — 396,157 814,567 1,210,724 Equity securities (1) 544 — — 544 State and municipal securities — 30 — 30 MBS — 13,945,463 — 13,945,463 Total investment securities available-for-sale (1) 225,050 15,974,001 814,567 17,013,618 Trading securities 214 1,416 — 1,630 RICs held-for-investment — — 217,170 217,170 LHFS (2) — 453,293 — 453,293 MSRs (3) — — 146,589 146,589 Derivatives: Cash flow — 45,681 — 45,681 Mortgage banking interest rate lock commitments — — 2,316 2,316 Mortgage banking forward sell commitments — 8,575 2 8,577 Customer related — 216,421 — 216,421 Foreign exchange — 56,742 — 56,742 Mortgage servicing — 838 — 838 Interest rate swap agreements — 2,075 — 2,075 Interest rate cap agreements — 76,387 — 76,387 Other — 12,293 — 12,293 Total financial assets $ 225,264 $ 16,847,722 $ 1,180,644 $ 18,253,630 Financial liabilities: Derivatives: Cash flow $ — $ 59,812 $ — $ 59,812 Customer related — 149,390 — 149,390 Foreign exchange — 46,430 — 46,430 Mortgage servicing — 1,635 — 1,635 Interest rate swaps — 2,647 — 2,647 Option for interest rate cap — 76,281 — 76,281 Total return settlement — — 30,618 30,618 Other — 15,625 700 16,325 Total financial liabilities $ — $ 351,820 $ 31,318 $ 383,138 (1) Investment securities available-for-sale disclosed on the Condensed Consolidated Balance Sheet at December 31, 2016 includes $10.6 million of equity securities valued using net asset value as a practical expedient that are not presented within this table. (2) LHFS disclosed on the Condensed Consolidated Balance Sheet also includes LHFS that are held at the lower of cost or fair value and are not presented within this table. (3) The Company had total MSRs of $150.3 million as of December 31, 2016 . The Company has elected to account for the majority of its MSR balance using the FVO, while the remainder of the MSRs are accounted for using the lower of cost or fair value and are not presented within this table. NOTE 16. FAIR VALUE (continued) Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis The Company may be required to measure certain assets and liabilities at fair value on a nonrecurring basis in accordance with GAAP from time to time. These adjustments to fair value usually result from application of lower-of-cost-or-fair value accounting or certain impairment measures. Assets measured at fair value on a nonrecurring basis that were still held on the balance sheet were as follows: Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Fair Value (in thousands) March 31, 2017 Impaired LHFI $ 11,436 $ 140,279 $ 286,183 $ 437,898 Foreclosed assets — 9,055 81,398 90,453 Vehicle inventory — 315,035 — 315,035 LHFS — — 1,861,021 1,861,021 Auto loans impaired due to bankruptcy — 54,929 — 54,929 MSRs — — 8,918 8,918 December 31, 2016 Impaired LHFI $ 13,147 $ 244,986 $ 265,664 $ 523,797 Foreclosed assets — 30,792 79,721 110,513 Vehicle inventory — 257,659 — 257,659 LHFS — — 2,133,040 2,133,040 MSRs — — 10,287 10,287 Valuation Processes and Techniques Impaired LHFI in the table above represents the recorded investment of impaired commercial loans for which the Company measures impairment during the period based on the fair value of the underlying collateral supporting the loan. Written offers to purchase a specific impaired loan are considered observable market inputs, which are considered Level 1 inputs. Appraisals are obtained to support the fair value of the collateral and incorporate measures such as recent sales prices for comparable properties and are considered Level 2 inputs. Loans for which the value of the underlying collateral is determined using a combination of real estate appraisals, field examinations and internal calculations are classified as Level 3. The inputs in the internal calculations may include the loan balance, estimation of the collectability of the underlying receivables held by the customer used as collateral, sale and liquidation value of the inventory held by the customer used as collateral and historical loss-given-default parameters. In cases in which the carrying value exceeds the fair value of the collateral less cost to sell, an impairment charge is recognized. The net carrying value of these loans was $395.6 million and $449.5 million at March 31, 2017 and December 31, 2016 , respectively. Loans previously impaired which were not marked to fair value during the periods presented are excluded from this table. Foreclosed assets represent the recorded investment in assets taken during the period presented in foreclosure of defaulted loans, and are primarily comprised of commercial and residential real properties and generally measured at fair value less costs to sell. The fair value of the real property is generally determined using appraisals or other indications of market value based on recent comparable sales of similar properties or assumptions generally observable in the marketplace. 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 values of used cars. The Company's LHFS portfolios that are measured at fair value on a nonrecurring basis primarily consist of personal, commercial, and RIC LHFS. The estimated fair value for these LHFS is calculated based on a combination of estimated market rates for similar loans with similar credit risks and a DCF analysis in which the Company uses significant unobservable inputs on key assumptions, including historical default rates and adjustments to reflect voluntary prepayments, prepayment rates, discount rates reflective of the cost of funding, and credit loss expectations. NOTE 16. FAIR VALUE (continued) 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. A portion of the Company's MSRs are measured at fair value on a nonrecurring basis. These MSRs are priced internally using a DCF model. The DCF model incorporates assumptions that market participants would use in estimating future net servicing income, including portfolio characteristics, prepayments assumptions, discount rates, delinquency and foreclosure rates, late charges, other ancillary revenues, cost to service and other economic factors. Due to the unobservable nature of certain valuation inputs, these MSRs are classified as Level 3. Fair Value Adjustments The following table presents the increases and decreases in value of certain assets that are measured at fair value on a nonrecurring basis for which a fair value adjustment has been included in the Condensed Consolidated Statements of Operations relating to assets held at period-end: Statement of Operations Three-Month Period Ended March 31, 2017 2016 (in thousands) Impaired loans held-for-investment Provision for credit losses $ (45,772 ) $ (91,860 ) Foreclosed assets Miscellaneous income (1) (1,742 ) (2,994 ) Loans held for sale Miscellaneous income (1) (66,121 ) (64,213 ) Auto loans impaired due to bankruptcy Provision for credit losses (23,600 ) — Mortgage servicing rights Mortgage banking income, net 95 181 $ (137,140 ) $ (158,886 ) (1) These amounts reduce Miscellaneous income. Level 3 Rollforward for Assets and Liabilities Measured at Fair Value on a Recurring Basis The tables below present the changes in Level 3 balances for the three-month periods ended March 31, 2017 and 2016 , respectively, for those assets and liabilities measured at fair value on a recurring basis. Three-Month Period Ended March 31, 2017 Investments RICs Held for Investment MSRs Derivatives Total (in thousands) Balance, December 31, 2016 $ 814,567 $ 217,170 $ 146,589 $ (29,000 ) $ 1,149,326 Losses in other comprehensive income (619 ) — — — (619 ) Gains in earnings — 16,891 1,457 1,194 19,542 Additions/Issuances — 13,331 5,730 — 19,061 Settlements (1) (240,494 ) (44,919 ) (4,321 ) 97 (289,637 ) Balance, March 31, 2017 $ 573,454 $ 202,473 $ 149,455 $ (27,709 ) $ 897,673 Changes in unrealized gains (losses) included in earnings related to balances still held at March 31, 2017 $ — $ 16,891 $ 1,457 $ (800 ) $ 17,548 (1) Settlements include charge-offs, prepayments, pay downs and maturities. NOTE 16. FAIR VALUE (continued) Three-Month Period Ended March 31, 2016 Investments RICs Held for Investment MSRs Derivatives Total (in thousands) Balance, December 31, 2015 $ 1,360,240 $ 335,425 $ 147,233 $ (51,278 ) $ 1,791,620 Gains in other comprehensive income 1,585 — — — 1,585 Gains/(losses) in earnings — 28,042 (14,356 ) 3,027 16,713 Additions/Issuances 278,686 — 3,591 — 282,277 Settlements (1) (88 ) (73,517 ) (5,726 ) 1,053 (78,278 ) Balance, March 31, 2016 $ 1,640,423 $ 289,950 $ 130,742 $ (47,198 ) $ 2,013,917 Changes in unrealized gains (losses) included in earnings related to balances still held at March 31, 2016 $ — $ 28,042 $ (14,356 ) $ (1,425 ) $ 12,261 (1) Settlements include charge-offs, prepayments, pay downs and maturities. The gains in earnings reported in the table above related to the RICs held for investment for which the Company elected the FVO are driven by three primary factors: 1) the recognition of interest income 2) recoveries of previously charged-off RICs and 3) actual performance of the portfolio since the Change in Control. Recoveries from RICs that were charged-off at the Change in Control date are a direct increase to the gain recognized within the portfolio. In accordance with ASC 805, Business Combinations , the Company did not ascribe a fair value to the portfolio of sub-prime charged-off RICs at the Change in Control date. Recoveries of previously charged off loans are usually recorded as a reduction to charge-offs in the period in which the recovery is made, however, in instances where the FVO is elected, it will flow through the fair value mark. At the Change in Control date, the unpaid principal balance of the previously charged-off RIC portfolio was approximately $3.0 billion . Valuation Processes and Techniques - Recurring Fair Value Assets and Liabilities The following is a description of the valuation techniques used for instruments measured at fair value on a recurring basis: Securities Available-for-Sale and Trading Securities Securities accounted for at fair value include both available-for-sale and trading securities portfolios. The Company utilizes a third-party pricing service to value its investment securities portfolios. Its primary pricing service has consistently proved to be a high quality third-party pricing provider. For those investments not valued by pricing vendors, other trusted market sources are utilized. The vendors the Company uses provide pricing services on a global basis. The Company monitors and validates the reliability of vendor pricing on an ongoing basis, which can include pricing methodology reviews, performing detailed reviews of the assumptions and inputs used by the vendor to price individual securities, and price validation testing. Price validation testing is performed independently of the risk-taking function and can include corroborating the prices received from third-party vendors with prices from another third-party source, reviewing valuations of comparable instruments, comparison to internal valuations, or by reference to recent sales of similar securities. The classification of securities within the fair value hierarchy is based upon the activity level in the market for the security type and the observability of the inputs used to determine their fair values. Trading securities and certain of the Company's U.S. Treasury securities are valued utilizing observable market quotes. The Company obtains vendor trading platform data (actual prices) from a number of live data sources, including active market makers and interdealer brokers. These certain investment securities are, therefore, classified as Level 1. NOTE 16. FAIR VALUE (continued) Actively traded quoted market prices for the majority of the investment securities available-for-sale, such as U.S. Treasury and government agency securities, corporate debt, state and municipal securities, and MBS, are not readily available. The Company's principal markets for its investment securities are the secondary institutional markets with an exit price that is predominantly reflective of bid-level pricing in these markets. These investment securities are priced by third-party pricing vendors. The third-party vendors use a variety of methods when pricing these securities that incorporate relevant observable market data to arrive at an estimate of what a buyer in the marketplace would pay for a security under current market conditions. These investment securities are, therefore, considered Level 2. Certain ABS are valued using DCF models. The DCF models are obtained from a third-party pricing vendor who uses observable market data and therefore are classified as Level 2. Other ABS that could not be valued using a third-party pricing service are valued using an internally-developed DCF model. When estimating the fair value using this model, the Company uses its best estimate of the key assumptions which include the discount rates and forward yield curves. The Company uses comparable bond indices based on industry, term, and rating to discount the expected future cash flows. Determining the comparability of assets involves significant subjectivity related to asset type differences, cash flows, performance and other inputs. The inability of the Company to corroborate the fair value of the ABS due to the limited available observable data on these ABS resulted in a fair value classification of Level 3. Equity securities of $10.7 million , which are comprised primarily of shares of registered mutual funds, are priced using net asset value per share practical expedient, which is validated with a sufficient level of observable activity. In accordance with GAAP, these equity securities are not presented within the fair value hierarchy. The remainder of the Company's equity securities are valued at quoted market prices and are, therefore, classified as Level 1. Gains and losses on investments are recognized in the Condensed Consolidated Statements of Operations through Net gain on sale of investment securities . RICs held-for-investment For certain RICs held-for-investment, the Company has elected the FVO. The fair values of RICs are estimated using the DCF model. In 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 voluntary prepayments, prepayment rates based on available data from a comparable market securitization of similar assets, discount rates reflective of the cost of funding debt issuance and recent historical equity yields, recovery rates based on the average severity utilizing reported severity rates and loss severity utilizing available market data from a comparable securitized pool. Accordingly, RICs held-for-investment for which the Company has elected FVO are classified as Level 3. LHFS The Company's LHFS portfolios that are measured at fair value on a recurring basis consists primarily of residential mortgage LHFS. The fair values of LHFS are estimated using published forward agency prices to agency buyers such as FNMA and FHLMC. The majority of the residential mortgage LHFS portfolio is sold to these two agencies. The fair value is determined using current secondary market prices for portfolios with similar characteristics, adjusted for servicing values and market conditions. These loans are regularly traded in active markets, and observable pricing information is available from market participants. The prices are adjusted as necessary to include the embedded servicing value in the loans as well as the specific characteristics of certain loans that are priced based on the pricing of similar loans. These adjustments represent unobservable inputs to the valuation, and are not significant given the relative insensitivity of the value to changes in these inputs to the fair value of the loans. Accordingly, residential mortgage LHFS are classified as Level 2. Gains and losses on residential mortgage LHFS are recognized in the Condensed Consolidated Statements of Operations through Miscellaneous income. See further discussion below in the section captioned "FVO for Financial Assets and Financial Liabilities." NOTE 16. FAIR VALUE (continued) MSRs The model to value MSRs estimates the present value of the future net cash flows from mortgage servicing activities based on various assumptions. These cash flows include servicing and ancillary revenue, offset by the estimated costs of performing servicing activities. Significant assumptions used in the valuation of residential MSRs include changes in anticipated loan prepayment rates ("CPRs") and the discount rate, reflective of a market participant's required return on an investment for similar assets. Other important valuation assumptions include market-based servicing costs and the anticipated earnings on escrow and similar balances held by the Company in the normal course of mortgage servicing activities. All of these assumptions are considered to be unobservable inputs. Historically, servicing costs and discount rates have been less volatile than CPR and earnings rates, both of which are directly correlated with changes in market interest rates. Increases in prepayment speeds, discount rates and servicing costs result in lower valuations of MSRs. Decreases in the anticipated earnings rate on escrow and similar balances result in lower valuations of MSRs. For each of these items, the Company makes assumptions based on current market information and future expectations. All of the assumptions are based on standards that the Company believes would be utilized by market participants in valuing MSRs and are derived and/or benchmarked against independent public sources. Accordingly, MSRs are classified as Level 3. Gains and losses on MSRs are recognized on the Condensed Consolidated Statements of Operations through Mortgage banking income, net . See further discussion on MSRs in Note 8 . Listed below are the most significant inputs that are utilized by the Company in the evaluation of residential MSRs: • A 10% and 20% increase in the CPR speed would decrease the fair value of the residential servicing asset by $5.1 million and $9.8 million , respectively, at March 31, 2017 . • A 10% and 20% increase in the discount rate would decrease the fair value of the residential servicing asset by $5.1 million and $9.8 million , respectively, at March 31, 2017 . Significant increases (decreases) in any of those inputs in isolation would result in significantly (lower) higher fair value measurements. These sensitivity calculations are hypothetical and should not be considered to be predictive of future performance. Changes in fair value based on adverse changes in assumptions generally cannot be extrapolated because the relationship of the change in assumption to the change in fair value may not be linear. Also, the effect of an adverse variation in a particular assumption on the fair value of the MSRs is calculated without changing any other assumption, while in reality changes in one factor may result in changes in another, which may either magnify or counteract the effect of the change. Prepayment estimates generally increase when market interest rates decline and decrease when market interest rates rise. Discount rates typically increase when market interest rates increase and/or credit and liquidity risks increase, and decrease when market interest rates decline and/or credit and liquidity conditions improve. Derivatives The valuation of these instruments is determined using widely accepted valuation techniques, including DCF analysis on the expected cash flows of each derivative. This analysis reflects the contractual terms of the derivatives, including the period to maturity, and uses observable and unobservable market-based inputs. The fair value represents the estimated amount the Company would receive or pay to terminate the contract or agreement, taking into account current interest rates, foreign exchange rates, equity prices and, when appropriate, the current creditworthiness of the counterparties. The Company incorporates credit valuation adjustments in the fair value measurement of its derivatives to reflect the counterparty's nonperformance risk in the fair value measurement of its derivatives, except for those derivative contracts with associated credit support annexes which provide credit enhancements, such as collateral postings and guarantees. The Company has determined that the majority of the inputs used to value its derivatives fall within Level 2 of the fair value hierarchy. Certain of the Company's derivatives utilize Level 3 inputs, which are primarily related to mortgage banking derivatives-interest rate lock commitments and total return settlement derivative contracts. NOTE 16. FAIR VALUE (continued) The DCF model is utilized to determine the fair value of the mortgage banking derivatives-interest rate lock commitments and the total return settlement derivative contracts. The significant unobservable inputs for mortgage banking derivatives used in the fair value measurement of the Company's loan commitments are "pull through" percentage and the MSR value that is inherent in the underlying loan value. The pull through percentage is an estimate of loan commitments that will result in closed loans. The significant unobservable inputs for total return settlement derivative contracts used in the fair value measurement of the Company's liabilities are discount percentages, which are based on comparable financial instruments. Significant increases (decreases) in any of these inputs in isolation would result in significantly higher (lower) fair value measurements. Significant increases (decreases) in the fair value of a mortgage banking derivative asset (liability) results when the probability of funding increases (decreases). Significant increases (decreases) in the fair value of a mortgage loan commitment result when the embedded servicing value increases (decreases). Gains and losses related to derivatives affect various line items in the Condensed Consolidated Statements of Operations . See Note 11 for a discussion of derivatives activity. Level 3 Inputs - Significant Recurring Fair Value Assets and Liabilities The following table presents quantitative information about the significant unobservable inputs within significant Level 3 recurring assets and liabilities. Fair Value at March 31, 2017 Valuation Technique Unobservable Inputs Range (in thousands) Financial Assets: ABS Financing bonds $ 524,096 Discounted Cash Flow Discount Rate (1) 1.44% - 2.60% (1.92%) Sale-leaseback securities $ 49,358 Consensus Pricing (2) Offered quotes (3) 125.69 % RICs held-for-investment $ 202,473 Discounted Cash Flow Prepayment rate (CPR) (4) 6.66 % Discount Rate (5) 9.50% - 14.50% (9.91%) Recovery Rate (6) 25.00% - 43.00% (28.83%) MSRs $ 149,455 Discounted Cash Flow Prepayment rate (CPR) (7) 0.03% - 53.47% (9.48%) Discount Rate (8) 9.90 % Mortgage banking interest rate lock commitments $ 4,310 Discounted Cash Flow Pull through percentage (9) 79.92 % MSR value (10) 0.73% - 1.03% (0.96%) Financial Liabilities: Total return settlement $ 31,123 Discounted Cash Flow Discount Rate

BUSINESS SEGMENT INFORMATION

BUSINESS SEGMENT INFORMATION	3 Months Ended
	Mar. 31, 2017
Segment Reporting [Abstract]
BUSINESS SEGMENT INFORMATION	BUSINESS SEGMENT INFORMATION Business Segment Products and Services The Company’s reportable segments are focused principally around the customers the Company serves. The Company has identified the following reportable segments: • The Consumer and Business Banking segment (formerly known as the Retail Banking segment) primarily comprises the Bank's branch locations, residential mortgage business and business banking customers. The branch locations offer a wide range of products and services to both consumers and business banking customers, which attract deposits by offering a variety of deposit instruments including demand and interest-bearing demand deposit accounts, money market and savings accounts, CDs and retirement savings products. The branch locations also offer consumer loans such as credit cards, home equity loans and lines of credit, and business loans such as commercial lines of credit and business credit cards. In addition, investment services provide annuities, mutual funds, managed monies, and insurance products and this business line provides investment services to the customers of the Consumer and Business Banking segment. Santander Universities, which provides grants and scholarships to universities and colleges as a way to foster education through research, innovation and entrepreneurship, is the last component of this segment. • The Commercial Banking segment currently provides commercial lines, loans, and deposits to medium and large business banking customers as well as financing and deposits for government entities, commercial loans to dealers and financing for commercial vehicles and municipal equipment. This segment also provides financing and deposits for government entities and niche product financing for specific industries, including oil and gas and mortgage warehousing, among others. • The Commercial Real Estate segment offers commercial real estate loans and multifamily loans to customers. • The Global Corporate Banking ("GCB") segment serves the needs of global commercial and institutional customers by leveraging the international footprint of the Santander Group to provide financing and banking services to corporations with over $500 million in annual revenues. GCB's offerings and strategy are based on Santander's local and global capabilities in wholesale banking. • SC is a specialized consumer finance company focused on vehicle finance and third-party servicing. SC’s primary business is the indirect origination of RICs, principally through manufacturer-franchised dealers in connection with their sale of new and used vehicles to retail consumers. In conjunction with a ten -year private label financing agreement with FCA that became effective May 1, 2013, SC 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 RICs and leases, as well as dealer loans for inventory, construction, real estate, working capital and revolving lines of credit. SC also originates vehicle loans through a web-based direct lending program, purchases vehicle RICs from other lenders, and services automobile, recreational and marine vehicle portfolios for other lenders. Additionally, SC has several relationships through which it provides personal loans, private label credit cards and other consumer finance products. During 2015, SC announced its intention to exit the personal lending business. SC has entered into a number of intercompany agreements with the Bank as described above as part of the Other segment. All intercompany revenue and fees between the Bank and SC are eliminated in the consolidated results of the Company. The Other category includes certain immaterial subsidiaries such as BSI, Banco Santander Puerto Rico, SIS, and SSLLC, interest expense on the Company's borrowings and other debt obligations and certain unallocated corporate income and indirect expenses. The Company’s segment results, excluding SC and the entities that have become part of the IHC, are derived from the Company’s business unit profitability reporting system by specifically attributing managed balance sheet assets, deposits and other liabilities and their related interest income or expense to each of the segments. Funds Transfer Pricing ("FTP") methodologies are utilized to allocate a cost for funds used or a credit for funds provided to business line deposits, loans and selected other assets using a matched funding concept. The methodology includes a liquidity premium adjustment, which considers an appropriate market participant spread for commercial loans and deposits by analyzing the mix of borrowings available to the Company with comparable maturity periods. NOTE 17. BUSINESS SEGMENT INFORMATION (continued) Other income and expenses are managed directly by each reportable segment, including fees, service charges, salaries and benefits, and other direct expenses, as well as certain allocated corporate expenses, and are accounted for within each segment’s financial results. Accounting policies for the lines of business are the same as those used in preparation of the Condensed Consolidated Financial Statements with respect to activities specifically attributable to each business line. However, the preparation of business line results requires management to establish methodologies to allocate funding costs and benefits, expenses and other financial elements to each line of business. Where practical, the results are adjusted to present consistent methodologies for the segments. The application and development of management reporting methodologies is a dynamic process and is subject to periodic enhancements. The implementation of these enhancements to the internal management reporting methodology may materially affect the results disclosed for each segment with no impact on consolidated results. Whenever significant changes to management reporting methodologies take place, prior period information is reclassified wherever practicable. The Chief Operating Decision Maker ("CODM"), as described by ASC 280, Segment Reporting, manages SC on a historical basis by reviewing the results of SC on a pre-Change in Control basis. The Results of Segments table discloses SC's operating information on the same basis that it is reviewed by SHUSA's CODM. The adjustments column includes adjustments to reconcile SC's GAAP results to the SHUSA consolidated view. There were no changes to the Company's reportable segments during the quarter ended March 31, 2017. The results of segments for the quarter ended March 31, 2016 have been recast to the current composition of the Company's reportable segments. Results of Segments The following tables present certain information regarding the Company’s segments. For the Three-Month Period Ended SHUSA Reportable Segments March 31, 2017 Consumer & Business Banking Commercial Banking Commercial Real Estate GCB Other (2) SC (3) SC Purchase Price Adjustments (4) Eliminations (4) Total (in thousands) Net interest income $ 303,448 $ 85,320 $ 69,496 $ 42,906 $ 12,824 $ 1,042,925 $ 37,305 $ 8,341 $ 1,602,565 Total non-interest income 84,998 13,366 2,245 11,670 187,621 434,848 5,454 (11,784 ) 728,418 Provision for credit losses 22,451 6,003 (617 ) (1,364 ) 15,610 635,013 58,349 — 735,445 Total expenses 385,309 54,247 21,995 23,468 240,983 621,334 11,872 (6,316 ) 1,352,892 Income/(loss) before income taxes (19,314 ) 38,436 50,363 32,472 (56,148 ) 221,426 (27,462 ) 2,873 242,646 Intersegment revenue/(expense) (1) 3,349 1,172 817 (2,175 ) (3,163 ) — — — — Total assets 19,279,101 11,457,211 14,397,413 8,077,848 42,835,963 39,061,940 — — 135,109,476 (1) Intersegment revenue/(expense) represents charges or credits for funds used or provided by each of the segments and is included in net interest income. (2) Other includes the results of the entities transferred to the IHC, earnings from non-strategic assets, the investment portfolio, interest expense on the Bank’s and the Parent Company's borrowings and other debt obligations, amortization of intangible assets and certain unallocated corporate income and indirect expenses. (3) Management of SHUSA manages SC by analyzing the pre-Change in Control results of SC as disclosed in this column. (4) Purchase Price Adjustments represents the impact that SC purchase marks had on the results of SC included within the consolidated operations of SHUSA, while eliminations eliminate intercompany transactions. NOTE 17. BUSINESS SEGMENT INFORMATION (continued) For the Three-Month Period Ended SHUSA Reportable Segments March 31, 2016 Consumer & Business Banking Commercial Banking Commercial Real Estate GCB Other (2) SC (3) SC Purchase Price Adjustments (4) Eliminations (4) Total (in thousands) Net interest income $ 222,561 $ 77,144 $ 64,757 $ 60,317 $ 54,212 $ 1,163,578 $ 51,773 $ 1,461 $ 1,695,803 Total non-interest income 97,986 16,554 4,940 20,982 200,979 353,191 13,782 (11,237 ) 697,177 Provision for credit losses 501 61,656 12,680 47,795 13,497 660,170 102,163 — 898,462 Total expenses 380,488 52,124 22,323 38,200 283,387 527,657 14,733 (12,937 ) 1,305,975 Income/(loss) before income taxes (60,442 ) (20,082 ) 34,694 (4,696 ) (41,693 ) 328,942 (51,341 ) 3,161 188,543 Intersegment revenue/(expense) (1) 12,702 4,604 3,378 (16 ) (20,668 ) — — — — Total assets 19,791,765 11,729,869 15,552,072 12,555,445 47,822,778 37,768,959 — — 145,220,888 (1) Intersegment revenue/(expense) represents charges or credits for funds used or provided by each of the segments and is included in net interest income. (2) Other includes the results of the entities transferred to the IHC, earnings from non-strategic assets, the investment portfolio, interest expense on the Bank’s and the Parent Company's borrowings and other debt obligations, amortization of intangible assets and certain unallocated corporate income and indirect expenses. (3) Management of SHUSA manages SC by analyzing the pre-Change in Control results of SC as disclosed in this column. (4) Purchase Price Adjustments represents the impact that SC purchase marks had on the results of SC included within the consolidated operations of SHUSA, while eliminations eliminate intercompany transactions.

INTERMEDIATE HOLDING COMPANY

INTERMEDIATE HOLDING COMPANY	3 Months Ended
	Mar. 31, 2017
Accounting Changes and Error Corrections [Abstract]
INTERMEDIATE HOLDING COMPANY	INTERMEDIATE HOLDING COMPANY On February 18, 2014, the Federal Reserve issued the Final Rule to strengthen regulatory oversight of FBOs. Under the Final Rule, FBOs with over $50 billion of U.S. non-branch assets, including Santander, were required to consolidate U.S. subsidiary activities under an IHC. Due to its U.S. non-branch total consolidated asset size, Santander is subject to the Final Rule. As a result of this rule, Santander transferred substantially all of its equity interests in U.S. bank and non-bank subsidiaries previously outside the Company to the Company, which became an IHC effective July 1, 2016. These subsidiaries included Santander BanCorp, BSI, SIS and SSLLC, as well as other subsidiaries. As these entities were and are solely owned and controlled by Santander prior to and after July 1, 2016, in accordance with ASC 805, the transaction has been accounted for under the common control guidance, which requires the Company to recognize the assets and liabilities transferred at their historical cost of the transferring entity at the date of the transfer. Additionally, as this transaction represented a change in reporting entity, the guidance requires retrospective combination of the entities for all periods presented in these financial statements as if the combination had been in effect since inception of common control. NOTE 18. INTERMEDIATE HOLDING COMPANY (continued) The following table summarizes the impact of the transfer to certain items within the Company's Condensed Consolidated Statement of Operations for the three months ended March 31, 2016: Income Statement As Previously Reported Retrospective Adjustments As Retrospectively Adjusted (in thousands) Three-months Ended March 31, 2016 Total interest income $ 1,969,504 $ 88,266 $ 2,057,770 Total interest expense 353,452 8,515 361,967 Provision for credit losses 882,278 16,184 898,462 Total fees and other income 571,280 98,647 669,927 Total general and administrative expenses 1,109,274 116,108 1,225,382 Income tax provision/(benefit) 65,396 13,464 78,860 Net Income 13,777 24,631 38,408 Additionally, the Consolidated Statement of Comprehensive Income, Shareholder's Equity and Cash Flows along with Footnotes 3, 4, 8, 11, 12, 13, 16, and 17 have been adjusted to reflect these retrospective adjustments.

BASIS OF PRESENTATION AND ACC27

BASIS OF PRESENTATION AND ACCOUNTING POLICIES (Policies)	3 Months Ended
	Mar. 31, 2017
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation These Condensed Consolidated Financial Statements include the accounts of the Company and its subsidiaries, including the Bank, SC, and certain special purpose financing trusts utilized in financing transactions that are considered variable interest entities ("VIEs"). The Company generally consolidates VIEs for which it is deemed to be the primary beneficiary and generally consolidates voting interest entities ("VOEs") in which the Company has a controlling financial interest. The Condensed Consolidated Financial Statements have been prepared by the Company pursuant to Securities and Exchange Commission ("SEC") regulations. All significant intercompany balances and transactions have been eliminated in consolidation. Additionally, where applicable, the Company's accounting policies conform to the accounting and reporting guidelines prescribed by bank regulatory authorities. However, in the opinion of management, the accompanying Condensed Consolidated Financial Statements reflect all adjustments of a normal and recurring nature necessary for a fair statement of the Condensed Consolidated Balance Sheets, Statements of Operations, Statements of Comprehensive Income, Statements of Stockholder's Equity and Statements of Cash Flows ("SCF") for the periods indicated, and contain adequate disclosure for the fair statement of this interim financial information.
Recently Adopted Accounting Policies and Recent Accounting Developments	Recently Adopted Accounting Policies Since January 1, 2017, the Company adopted the following Financial Accounting Standards Board ("FASB") Accounting Standards Updates ("ASUs"): • ASU 2016-05, Derivatives and Hedging (Topic 815): Effect of Derivative Contract Novations on Existing Hedge Accounting Relationships. This new guidance clarifies that a change in the counterparties to a derivative contract (i.e. a novation), in and of itself does not require the de-designation of a hedging relationship. An entity will, however, still need to evaluate whether it is probable that the counterparty will perform under the contract as part of its ongoing effectiveness assessment for hedge accounting. The adoption of this ASU did not have an impact on the Company's financial position or results of operations. • ASU 2016-06, Derivatives and Hedging (Topic 815): Contingent Put and Call Options in Debt Instruments. The Company adopted this ASU on a modified retrospective basis. This new guidance clarifies that an exercise contingency does not need to be evaluated to determine whether it relates to interest rates and credit risk in an embedded derivative analysis of hybrid financial instruments. In other words, a contingent put or call option embedded in a debt instrument would be evaluated for possible separate accounting as a derivative instrument without regard to the nature of the exercise contingency. However, as required under existing guidance, companies will still need to evaluate other relevant embedded derivative guidance, such as whether the payoff from the contingent put or call option is adjusted based on changes in an index other than interest rates or credit risk, and whether the debt involves a substantial premium or discount. The adoption of this ASU did not have an impact on the Company's financial position or results of operations. NOTE 1. BASIS OF PRESENTATION AND ACCOUNTING POLICIES (continued) • ASU 2016-07, Investments-Equity Method and Joint Ventures (Topic 323) . This new guidance eliminates the requirement to apply the equity method of accounting retrospectively when a reporting entity obtains significant influence over a previously held investment. Instead, the equity method of accounting should be applied prospectively from the date significant influence is obtained. Investors should add the cost of acquiring the additional interest in the investee (if any) to the current basis of their previously held interest. The new standard also provides specific guidance for available-for-sale securities that become eligible for the equity method of accounting. In those cases, any unrealized gain or loss recorded within accumulated other comprehensive income should be recognized in earnings at the date the investment initially qualifies for the use of the equity method of accounting. The adoption of this ASU did not have an impact on the Company’s financial position or results of operations. • ASU 2016-09, Compensation - Stock Compensation (Topic 718) . This new guidance simplifies certain aspects related to income taxes, the Statement of Cash Flows, and forfeitures when accounting for share-based payment transactions. ASU 2016-09 eliminates the requirement to recognize excess tax benefits in Accumulated Paid In Capital pools, and instead requires companies to record all excess tax benefits and deficiencies at settlement, vesting or expiration in the income statement as provision for income taxes. At adoption of ASU 2016-09 on January 1, 2017, the cumulative-effect for previously unrecognized excess tax benefits totaled $27.1 million net of tax, and was recognized through an increase of $14.8 million to beginning retained earnings and $37.4 million to non-controlling interest, offset by a decrease of $26.5 million to common stock and paid in capital. The Company recorded excess tax benefits, net of tax of $47 thousand in the provision for income taxes rather than as an increase to additional paid in capital for the three-months ended March 31, 2017, on a prospective basis. Therefore, the prior period presented has not been adjusted. All excess tax benefits along with other income tax cash flows will now be classified as an operating activity rather than financing activities in the Statement of Cash Flows on a prospective basis. In addition, the Company changed its accounting policy on forfeitures from previously recognizing forfeitures based on estimating the number of awards expected to be forfeited to electing to recognize forfeiture of awards as they occur to simplify the accounting for forfeitures. This resulted in a cumulative adjustment, as a decrease to, beginning retained earnings of $1.4 million . • ASU 2016-17, Consolidation (Topic 810), Interest Held Through Related Parties That Are Under Common Control. This ASU amends the guidance in GAAP on related parties that are under common control. Specifically, the new ASU requires that a single decision maker consider indirect interests held by related parties under common control on a proportionate basis in a manner consistent with its evaluation of indirect interests held through other related parties. The adoption of this ASU did not have an impact on the Company's financial position or results of operations. In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers (Topic 606) , superseding the revenue recognition requirements in ASC 605. 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. The amendment includes a five-step process to assist an entity in achieving the main principle(s) of revenue recognition under ASC 605. In August 2015, the FASB issued ASU 2015-14, which formalized the deferral of the effective date of the amendment for a period of one year from the original effective date. Following the issuance of ASU 2015-14, the amendment will be effective for the Company for the first annual period ending beginning after December 15, 2017. In March 2016, the FASB also issued ASU 2016-08, an amendment to the guidance in ASU 2014-09, which revises the structure of the indicators to determine whether the entity is the principal or agent in a revenue transaction, and eliminated two of the indicators (“the entity’s consideration is in the form of a commission” and “the entity is not exposed to credit risk”) in making that determination. This amendment also clarifies that each indicator may be more or less relevant to the assessment depending on the terms and conditions of the contract. In April 2016, the FASB also issued ASU 2016-10, which clarifies the implementation guidance on identifying promised goods or services and on determining whether an entity's promise to grant a license with either a right to use the entity's intellectual property (which is satisfied at a point in time) or a right to access the entity's intellectual property (which is satisfied over time). In May 2016, the FASB issued ASU 2016-12, an amendment to ASU 2014-09, which provided practical expedients related to disclosures of remaining performance obligations, as well as other amendments to guidance on transition, collectability, non-cash consideration and the presentation of sales and other similar taxes. The amendments, collectively, should be applied retrospectively to each prior reporting period presented or as a cumulative effect adjustment as of the date of adoption. Because the ASU does not apply to revenue associated with leases and financial instruments (including loans and securities), the Company does not expect the new guidance to have a material impact on the elements of its Consolidated Statements of Operations most closely associated with leases and financial instruments (such as interest income, interest expense and securities gain). The Company expects to adopt this ASU in the first quarter of 2018 with a cumulative-effect adjustment to opening retained earnings. The Company’s ongoing implementation efforts include the identification of other revenue streams that are within the scope of the new guidance and reviewing related contracts with customers to determine the effect on certain non-interest income items presented in the Consolidated Statements of Operations and on the presentation and disclosures. In January 2016, the FASB issued ASU 2016-01, Financial Instruments - Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities. This amendment requires that equity investments, except those accounted for under the equity method of accounting or which result in consolidation of the investee, be measured at fair value with changes in the fair value being recorded in net income. However, equity investments that do not have readily determinable fair values will be measured at cost less impairment, if any, plus the effect of changes resulting from observable price transactions in orderly transactions or for the identical or similar investment of the same issuer. This amendment also simplifies the impairment assessment of equity instruments that do not have readily determinable fair values, eliminates the requirement to disclose methods and assumptions used to estimate the fair value of instruments measured at their amortized cost on the balance sheet, requires that the disclosed fair values of financial instruments represent the "exit price," requires entities to separately present in other comprehensive income the portion of the total change in fair value of a liability resulting from instrument-specific credit risk when the FVO has been elected for that liability, requires separate presentation of financial assets and financial liabilities by measurement category and form of financial asset on the balance sheet or in the accompanying notes, and clarifies that an entity should evaluate the need for a valuation allowance on its deferred tax asset related to its available-for-sale securities in combination with its other deferred tax assets. This amendment will be effective for the Company for the first reporting period beginning after December 15, 2017, with earlier adoption permitted by public entities on a limited basis. Adoption of this amendment must be applied by means of a cumulative-effect adjustment to the balance sheet as of the beginning of the fiscal year of adoption, except for amendments related to equity instruments that do not have readily determinable fair values for which it should be applied prospectively. While the Company is in the process of evaluating the impacts of the adoption of this ASU, we do not expect the impact to be significant to our financial position or results of operations given the immaterial amount of our investment in equity securities. NOTE 2. RECENT ACCOUNTING DEVELOPMENTS (continued) In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842). The guidance in this update supersedes the current lease accounting guidance for both lessees and lessors under ASC 840, Leases. The new guidance requires lessees to evaluate whether a lease is a finance lease using criteria similar to what lessees use today to determine whether they have a capital lease. Leases not classified as finance leases are classified as operating leases. This classification will determine whether the lease expense is recognized based on an effective interest method or on a straight-line basis over the term of the lease. The lessee is also required to record a right-of-use asset and a lease liability for all leases with a term of greater than 12 months regardless of their classification. Leases with a term of 12 months or less will be accounted for similarly to today’s guidance for operating leases. The new guidance will require lessors to account for leases using an approach that is substantially similar to the existing guidance for sales-type, direct financing leases and operating leases. This new guidance will be effective for the Company for the first reporting period beginning after December 15, 2018, with earlier adoption permitted. The Company does not intend to early adopt this ASU. Adoption of this amendment must be applied on a modified retrospective approach. The Company is in the process of reviewing our existing property and equipment lease contracts as well as service contracts that may include embedded leases. Upon adoption, the Company expects to report higher assets and liabilities from recording the present value of the future minimum lease payments of the leases. In June 2016, the FASB issued ASU 2016-13, Financial Instruments - Credit Losses (Topic 326), Measurement of Credit Losses on Financial Instruments . This new guidance significantly changes how entities will measure credit losses for most financial assets and certain other instruments that are not measured at fair value through net income. The standard will replace today’s “incurred loss” approach with an “expected loss” model for instruments measured at amortized cost. For available-for-sale debt securities, entities will be required to record allowances rather than reduce the carrying amount, as they do today under the other-than-temporary impairment ("OTTI") model. It also simplifies the accounting model for purchased credit-impaired debt securities and loans. The new guidance will be effective for the Company for the first reporting period beginning after December 15, 2019, with earlier adoption permitted. Adoption of this new guidance can be applied only on a prospective basis as a cumulative-effect adjustment to retained earnings. The Company is currently evaluating the impact of the new guidance on its Consolidated Financial Statements. It is expected that the new model will include different assumptions used in calculating credit losses, such as estimating losses over the estimated life of a financial asset, and will consider expected future changes in macroeconomic conditions. The adoption of this ASU may result in an increase to the Company’s allowance for credit losses (“ACL”), which will depend upon the nature and characteristics of the Company's portfolio at the adoption date, as well as the macroeconomic conditions and forecasts at that date. The Company currently does not intend to early adopt this new guidance. In August 2016, the FASB issued ASU 2016-15, Statement of Cash Flows (Topic 230), Classification of Certain Cash Receipts and Cash Payments. This update amends the guidance in ASC 230 on the classification of certain cash receipts and payments in the SCF. The ASU’s amendments add or clarify guidance on eight cash flow issues including debt extinguishment costs, contingent consideration payments made after a business combination, proceeds from the settlement of insurance claims, proceeds from the settlement of corporate-owned life insurance policies, distributions received from equity method investees, beneficial interests in securitization transactions, and separately identifiable cash flows and application of the predominance principle. The guidance will be effective for the fiscal year beginning after December 15, 2017, including interim periods within that year. Early adoption is permitted, including adoption in an interim period; however, any adjustments should be reflected as of the beginning of the fiscal year that includes the period of adoption. All of the amended guidance must be adopted in the same period. The Company does not expect the adoption of this ASU to have an impact on its financial position or results of operations and expects the impact to be to disclosure only. In October 2016, the FASB issued ASU 2016-16, Income Taxes (Topic 740), Intra-Entity Transfers of Assets Other Than Inventory, which will require an entity to recognize the income tax consequences of an intra-entity transfer of an asset, other than inventory, when the transfer occurs. This eliminates the current exception for all intra-entity transfers of an asset other than inventory that requires deferral of the tax effects until the asset is sold to a third party or otherwise recovered through use. The guidance will be effective for the Company for annual reporting periods beginning after December 15, 2017, including interim reporting periods. Early adoption is permitted at the beginning of an annual reporting period for which annual or interim financial statements have not been issued or made available for issuance. The Company is in the process of evaluating the impacts of the adoption of this ASU. NOTE 2. RECENT ACCOUNTING DEVELOPMENTS (continued) In November 2016, the FASB issued ASU 2016-18, Statement of Cash Flows (Topic 230): Restricted Cash (A consensus of the FASB Emerging Issues Task Force), which requires that the SCF include restricted cash in the beginning and end-of-period total amounts shown on the SCF, and that the SCF explain changes in restricted cash during the period. This guidance will be effective for the Company for annual periods beginning after December 15, 2017, including interim periods within those fiscal years. Early adoption is permitted; however, adjustments should be reflected as of the beginning of the fiscal year that includes that interim period. The Company does not expect the adoption of this ASU to have an impact on its financial position or result of operations and expects the impact to be disclosure only. In January 2017, the FASB issued ASU 2017-01, Business Combinations (Topic 805): Clarifying the Definition of a Business. This new guidance revises the definition of a business, potentially affecting areas of accounting such as acquisitions, disposals, goodwill impairment, and consolidation. Under the new guidance, when substantially all of the fair value of gross assets acquired (or disposed of) is concentrated in a single identifiable asset or a group of similar identifiable assets, the assets acquired (or disposed of) would not represent a business. If this initial screen is met, no further analysis would be required. To be considered a business, an acquisition would have to include an input and a substantive process that together significantly contribute to the ability to create an output. In addition, the amendments narrow the definition of the term “output” so that it is consistent with how outputs are defined in ASC Topic 606, Revenue from Contracts with Customers . This new guidance will be effective for the Company for the first reporting period beginning after December 15, 2017, with earlier adoption permitted. Adoption of these amendments must be applied on a prospective basis. The Company is in the process of evaluating the impacts of the adoption of this ASU. In January 2017, the FASB also issued ASU 2017-04, Intangibles - Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment. It removes Step 2 of the goodwill impairment test, which requires a hypothetical purchase price allocation. The new rules provide that a goodwill impairment will be the amount by which a reporting unit’s carrying value exceeds its fair value, not to exceed the carrying amount of goodwill. All other goodwill impairment guidance will remain largely unchanged. The same one-step impairment test will be applied to goodwill at all reporting units, even those with zero or negative carrying amounts. Entities will be required to disclose the amount of goodwill at reporting units with zero or negative carrying amounts. The revised guidance will be applied prospectively, and is effective for calendar year-end SEC filers in 2020. Early adoption is permitted for impairment tests performed after January 1, 2017. The Company is in the process of evaluating the impacts of the adoption of this ASU. In February 2017, the FASB issued 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. It defines an in-substance nonfinancial asset, unifies guidance related to partial sales of nonfinancial assets, eliminates rules specifically addressing the sales of real estate, removes exceptions to the financial asset derecognition model, and clarifies the accounting for contributions of nonfinancial assets to joint ventures. The revised guidance is effective January 1, 2018 and will be applied under either a full retrospective approach or a modified retrospective approach. The Company is in the process of evaluating the impacts of the adoption of this ASU. In March 2017, the FASB issued ASU 2017-07, Compensation - Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost. This new guidance changes how employers that sponsor defined benefit pension plans and other postretirement plans present the net periodic benefit cost in the income statement. An employer is required to report the service cost component in the same line item or items as other compensation costs arising from services rendered by the pertinent employees during the period. Other components of net benefit cost are required to be presented in the income statement separately from the service cost component and outside a subtotal of income from operations, if one is presented. The amendment also allows only the service cost component to be eligible for capitalization, when applicable. This new guidance will be effective for the Company for the first reporting period beginning after December 15, 2017, with earlier adoption permitted. The amendment will be applied retrospectively for the presentation requirements and prospectively for the capitalization of the service cost component requirements. The Company does not expect that the adoption of this ASU will have a material impact on the Company’s financial position or results of operations. NOTE 2. RECENT ACCOUNTING DEVELOPMENTS (continued) In March 2017, the FASB also issued ASU 2017-08, Receivables - Nonrefundable Fees and Other Costs (Subtopic 310-20): Premium Amortization on Purchased Callable Debt Securities. This new guidance requires certain premiums on callable debt securities to be amortized to the earliest call date. Under existing rules, entities generally amortize the premium as an adjustment of yield over the contractual life of the security. The amortization period for callable debt securities purchased at a discount is not affected. This new guidance will be effective for the Company for the first reporting period beginning after December 15, 2018, with earlier adoption permitted. The amendment will be applied on a modified retrospective basis through a cumulative-effect adjustment as of the date of the adoption. The Company is currently evaluating the impact of this ASU. In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers (Topic 606) , superseding the revenue recognition requirements in ASC 605. 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. The amendment includes a five-step process to assist an entity in achieving the main principle(s) of revenue recognition under ASC 605. In August 2015, the FASB issued ASU 2015-14, which formalized the deferral of the effective date of the amendment for a period of one year from the original effective date. Following the issuance of ASU 2015-14, the amendment will be effective for the Company for the first annual period ending beginning after December 15, 2017. In March 2016, the FASB also issued ASU 2016-08, an amendment to the guidance in ASU 2014-09, which revises the structure of the indicators to determine whether the entity is the principal or agent in a revenue transaction, and eliminated two of the indicators (“the entity’s consideration is in the form of a commission” and “the entity is not exposed to credit risk”) in making that determination. This amendment also clarifies that each indicator may be more or less relevant to the assessment depending on the terms and conditions of the contract. In April 2016, the FASB also issued ASU 2016-10, which clarifies the implementation guidance on identifying promised goods or services and on determining whether an entity's promise to grant a license with either a right to use the entity's intellectual property (which is satisfied at a point in time) or a right to access the entity's intellectual property (which is satisfied over time). In May 2016, the FASB issued ASU 2016-12, an amendment to ASU 2014-09, which provided practical expedients related to disclosures of remaining performance obligations, as well as other amendments to guidance on transition, collectability, non-cash consideration and the presentation of sales and other similar taxes. The amendments, collectively, should be applied retrospectively to each prior reporting period presented or as a cumulative effect adjustment as of the date of adoption. Because the ASU does not apply to revenue associated with leases and financial instruments (including loans and securities), the Company does not expect the new guidance to have a material impact on the elements of its Consolidated Statements of Operations most closely associated with leases and financial instruments (such as interest income, interest expense and securities gain). The Company expects to adopt this ASU in the first quarter of 2018 with a cumulative-effect adjustment to opening retained earnings. The Company’s ongoing implementation efforts include the identification of other revenue streams that are within the scope of the new guidance and reviewing related contracts with customers to determine the effect on certain non-interest income items presented in the Consolidated Statements of Operations and on the presentation and disclosures. In January 2016, the FASB issued ASU 2016-01, Financial Instruments - Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities. This amendment requires that equity investments, except those accounted for under the equity method of accounting or which result in consolidation of the investee, be measured at fair value with changes in the fair value being recorded in net income. However, equity investments that do not have readily determinable fair values will be measured at cost less impairment, if any, plus the effect of changes resulting from observable price transactions in orderly transactions or for the identical or similar investment of the same issuer. This amendment also simplifies the impairment assessment of equity instruments that do not have readily determinable fair values, eliminates the requirement to disclose methods and assumptions used to estimate the fair value of instruments measured at their amortized cost on the balance sheet, requires that the disclosed fair values of financial instruments represent the "exit price," requires entities to separately present in other comprehensive income the portion of the total change in fair value of a liability resulting from instrument-specific credit risk when the FVO has been elected for that liability, requires separate presentation of financial assets and financial liabilities by measurement category and form of financial asset on the balance sheet or in the accompanying notes, and clarifies that an entity should evaluate the need for a valuation allowance on its deferred tax asset related to its available-for-sale securities in combination with its other deferred tax assets. This amendment will be effective for the Company for the first reporting period beginning after December 15, 2017, with earlier adoption permitted by public entities on a limited basis. Adoption of this amendment must be applied by means of a cumulative-effect adjustment to the balance sheet as of the beginning of the fiscal year of adoption, except for amendments related to equity instruments that do not have readily determinable fair values for which it should be applied prospectively. While the Company is in the process of evaluating the impacts of the adoption of this ASU, we do not expect the impact to be significant to our financial position or results of operations given the immaterial amount of our investment in equity securities. NOTE 2. RECENT ACCOUNTING DEVELOPMENTS (continued) In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842). The guidance in this update supersedes the current lease accounting guidance for both lessees and lessors under ASC 840, Leases. The new guidance requires lessees to evaluate whether a lease is a finance lease using criteria similar to what lessees use today to determine whether they have a capital lease. Leases not classified as finance leases are classified as operating leases. This classification will determine whether the lease expense is recognized based on an effective interest method or on a straight-line basis over the term of the lease. The lessee is also required to record a right-of-use asset and a lease liability for all leases with a term of greater than 12 months regardless of their classification. Leases with a term of 12 months or less will be accounted for similarly to today’s guidance for operating leases. The new guidance will require lessors to account for leases using an approach that is substantially similar to the existing guidance for sales-type, direct financing leases and operating leases. This new guidance will be effective for the Company for the first reporting period beginning after December 15, 2018, with earlier adoption permitted. The Company does not intend to early adopt this ASU. Adoption of this amendment must be applied on a modified retrospective approach. The Company is in the process of reviewing our existing property and equipment lease contracts as well as service contracts that may include embedded leases. Upon adoption, the Company expects to report higher assets and liabilities from recording the present value of the future minimum lease payments of the leases. In June 2016, the FASB issued ASU 2016-13, Financial Instruments - Credit Losses (Topic 326), Measurement of Credit Losses on Financial Instruments . This new guidance significantly changes how entities will measure credit losses for most financial assets and certain other instruments that are not measured at fair value through net income. The standard will replace today’s “incurred loss” approach with an “expected loss” model for instruments measured at amortized cost. For available-for-sale debt securities, entities will be required to record allowances rather than reduce the carrying amount, as they do today under the other-than-temporary impairment ("OTTI") model. It also simplifies the accounting model for purchased credit-impaired debt securities and loans. The new guidance will be effective for the Company for the first reporting period beginning after December 15, 2019, with earlier adoption permitted. Adoption of this new guidance can be applied only on a prospective basis as a cumulative-effect adjustment to retained earnings. The Company is currently evaluating the impact of the new guidance on its Consolidated Financial Statements. It is expected that the new model will include different assumptions used in calculating credit losses, such as estimating losses over the estimated life of a financial asset, and will consider expected future changes in macroeconomic conditions. The adoption of this ASU may result in an increase to the Company’s allowance for credit losses (“ACL”), which will depend upon the nature and characteristics of the Company's portfolio at the adoption date, as well as the macroeconomic conditions and forecasts at that date. The Company currently does not intend to early adopt this new guidance. In August 2016, the FASB issued ASU 2016-15, Statement of Cash Flows (Topic 230), Classification of Certain Cash Receipts and Cash Payments. This update amends the guidance in ASC 230 on the classification of certain cash receipts and payments in the SCF. The ASU’s amendments add or clarify guidance on eight cash flow issues including debt extinguishment costs, contingent consideration payments made after a business combination, proceeds from the settlement of insurance claims, proceeds from the settlement of corporate-owned life insurance policies, distributions received from equity method investees, beneficial interests in securitization transactions, and separately identifiable cash flows and application of the predominance principle. The guidance will be
Subsequent Events	Subsequent Events The Company evaluated events from the date of the Condensed Consolidated Financial Statements on March 31, 2017 through the issuance of these Condensed Consolidated Financial Statements , and has determined that there have been no material events that would require recognition in its Condensed Consolidated Financial Statements or disclosure in the Notes to the Condensed Consolidated Financial Statements for the Three-Month Period Ended March 31, 2017 other than the transactions disclosed in Notes 10 and 15.
Commercial Lending Asset Quality Indicators	Commercial Lending Asset Quality Indicators Commercial credit quality disaggregated by class of financing receivables is summarized according to standard regulatory classifications as follows: PASS. Asset is well-protected by the current net worth and paying capacity of the obligor or guarantors, if any, or by the fair value less costs to acquire and sell any underlying collateral in a timely manner. SPECIAL MENTION. Asset has potential weaknesses that deserve management’s close attention, which, if left uncorrected, may result in deterioration of the repayment prospects for an asset at some future date. Special mention assets are not adversely classified. SUBSTANDARD. Asset is inadequately protected by the current net worth and paying capacity of the obligor or by the collateral pledged, if any. A well-defined weakness or weaknesses exist that jeopardize the liquidation of the debt. The loans are characterized by the distinct possibility that the Company will sustain some loss if deficiencies are not corrected. DOUBTFUL. Exhibits the inherent weaknesses of a substandard credit. Additional characteristics exist that make collection or liquidation in full highly questionable and improbable, on the basis of currently known facts, conditions and values. Possibility of loss is extremely high, but because of certain important and reasonable specific pending factors which may work to the advantage and strengthening of the credit, an estimated loss cannot yet be determined. LOSS. Credit is considered uncollectible and of such little value that it does not warrant consideration as an active asset. There may be some recovery or salvage value, but there is doubt as to whether, how much or when the recovery would occur.
Troubled Debt Restructurings	Commercial Loan TDRs All of the Company’s commercial loan modifications are based on the circumstances of the individual customer, including specific customers' complete relationships with the Company. Loan terms are modified to meet each borrower’s specific circumstances at a point in time and may allow for modifications such as term extensions, interest rate reductions, etc. Modifications for commercial loan TDRs generally, although not always, result in bifurcation of the original loan into A and B notes. The A note is restructured to allow for upgraded risk rating and return to accrual status after a sustained period of payment performance has been achieved (typically six months for monthly payment schedules). The B note, if any, is structured as a deficiency note; the balance is charged off but the debt is usually not forgiven. Commercial TDRs are generally placed on non-accrual status until the Company believes repayment under the revised terms is reasonably assured and a sustained period of repayment performance has been achieved (typically six months for a monthly amortizing loan). TDRs are subject to analysis for specific reserves by either calculating the present value of expected future cash flows or, if collateral-dependent, calculating the fair value of the collateral less its estimated cost to sell. The TDR classification will remain on the loan until it is paid in full or liquidated. Consumer Loan TDRs The primary modification program for the Company’s residential mortgage and home equity portfolios is a proprietary program designed to keep customers in their homes and, when appropriate, prevent them from entering into foreclosure. The program is available to all customers facing a financial hardship regardless of their delinquency status. The main goal of the modification program is to review the customer’s entire financial condition to ensure that the proposed modified payment solution is affordable according to a specific debt-to-income ("DTI") ratio range. The main modification benefits of the program allow for term extensions, interest rate reductions, and/or deferment of principal. The Company reviews each customer on a case-by-case basis to determine which benefit or combination of benefits will be offered to achieve the target DTI range. For the Company’s other consumer portfolios, including RICs and auto loans, the terms of the modifications generally include one or a combination of: a reduction of the stated interest rate of the loan to a rate of interest lower than the current market rate for new debt with similar risk, an extension of the maturity date or principal forgiveness. Consumer TDRs excluding RICs are generally placed on non-accrual status until the Company believes repayment under the revised terms is reasonably assured and a sustained period of repayment performance has been achieved (typically six months for a monthly amortizing loan). Any loan that has remained current for the six months immediately prior to modification will remain on accrual status after the modification is implemented. RIC TDRs are placed on nonaccrual status when the Company believes repayment under the revised terms is not reasonably assured, and considered for return to accrual when a sustained period of repayment performance has been achieved. The TDR classification will remain on the loan until it is paid in full or liquidated. In addition to loans identified as TDRs above, the guidance also requires loans discharged under Chapter 7 bankruptcy proceedings to be considered TDRs and collateral-dependent, regardless of delinquency status. TDRs that are collateral-dependent loans must be written down to fair market value and classified as non-accrual/non-performing loans for the remaining life of the loan. NOTE 4. LOANS AND ALLOWANCE FOR CREDIT LOSSES (continued) TDR Impact to ALLL The ALLL is established to recognize losses inherent in funded loans intended to be held-for-investment that are probable and can be reasonably estimated. Prior to loans being placed in TDR status, the Company generally measures its allowance under a loss contingency methodology in which consumer loans with similar risk characteristics are pooled and loss experience information is monitored for credit risk and deterioration with statistical tools considering factors such as delinquency, LTV and credit scores. Upon TDR modification, the Company generally measures impairment based on a present value of expected future cash flows methodology considering all available evidence using the original effective interest rate or fair value of collateral, less costs to sell. The amount of the required ALLL is equal to the difference between the loan’s impaired value and the recorded investment. When a consumer TDR subsequently defaults, the Company generally measures impairment based on the fair value of the collateral, if applicable, less its estimated cost to sell. Typically, commercial loans whose terms are modified in a TDR will have been identified as impaired prior to modification and accounted for generally using a present value of expected future cash flows methodology, unless the loan is considered collateral-dependent. Loans considered collateral-dependent are measured for impairment based on their fair values of collateral less estimated cost to sell. Accordingly, upon TDR modification or if a TDR modification subsequently defaults, the allowance methodology remains unchanged.

INVESTMENT SECURITIES (Tables)

INVESTMENT SECURITIES (Tables)	3 Months Ended
	Mar. 31, 2017
Investments, Debt and Equity Securities [Abstract]
Summary of Available-for-sale Securities	The following tables present the amortized cost, gross unrealized gains and losses and approximate fair values of securities available-for-sale at the dates indicated: March 31, 2017 Amortized Cost Gross Unrealized Gains Gross Unrealized Loss Fair Value (in thousands) U.S. Treasury securities $ 2,303,126 $ 2,554 $ (2,435 ) $ 2,303,245 Corporate debt securities 210,906 — — 210,906 Asset-backed securities (“ABS”) 740,136 15,791 (2,452 ) 753,475 Equity securities 11,800 — (583 ) 11,217 State and municipal securities 28 — — 28 Mortgage-backed securities (“MBS”): U.S. government agencies - Residential 5,280,127 4,491 (57,579 ) 5,227,039 U.S. government agencies - Commercial 916,197 2,410 (9,198 ) 909,409 Federal Home Loan Mortgage Corporation (“FHLMC”) 9,057,713 15,092 (144,618 ) 8,928,187 FHLMC and FNMA - Commercial debt securities 23,475 — (660 ) 22,815 Non-agency securities 7 — — 7 Total investment securities available-for-sale $ 18,543,515 $ 40,338 $ (217,525 ) $ 18,366,328 December 31, 2016 Amortized Cost Gross Unrealized Gains Gross Unrealized Loss Fair Value (in thousands) U.S. Treasury securities $ 1,857,357 $ 1,826 $ (2,326 ) $ 1,856,857 ABS 1,196,702 16,410 (2,388 ) 1,210,724 Equity securities 11,716 — (565 ) 11,151 State and municipal securities 30 — — 30 MBS: U.S. government agencies - Residential 5,424,412 3,253 (64,537 ) 5,363,128 U.S. government agencies - Commercial 948,696 1,998 (8,196 ) 942,498 FHLMC and FNMA - Residential debt securities 7,765,003 6,712 (154,858 ) 7,616,857 FHLMC and FNMA - Commercial debt securities 23,636 — (670 ) 22,966 Non-agency securities 14 — — 14 Total investment securities available-for-sale $ 17,227,566 $ 30,199 $ (233,540 ) $ 17,024,225
Summary of Held-to-maturity Securities	The following tables present the amortized cost, gross unrealized gains and losses and approximate fair values of securities held-to-maturity at the dates indicated: March 31, 2017 Amortized Cost Gross Unrealized Gains Gross Unrealized Loss Fair Value (in thousands) MBS: U.S. government agencies - Residential $ 1,621,221 $ 1,477 $ (28,442 ) $ 1,594,256 Total investment securities held-to-maturity $ 1,621,221 $ 1,477 $ (28,442 ) $ 1,594,256 December 31, 2016 Amortized Cost Gross Unrealized Gains Gross Unrealized Loss Fair Value (in thousands) MBS: U.S. government agencies - Residential $ 1,658,644 $ 2,195 $ (25,426 ) $ 1,635,413 Total investment securities held-to-maturity $ 1,658,644 $ 2,195 $ (25,426 ) $ 1,635,413
Investments Classified by Contractual Maturity Date	Contractual maturities of the Company’s debt securities available-for-sale at March 31, 2017 were as follows: Amortized Cost Fair Value (in thousands) Due within one year $ 1,172,284 $ 1,172,700 Due after 1 year but within 5 years 1,924,934 1,940,276 Due after 5 years but within 10 years 222,527 221,086 Due after 10 years 15,211,970 15,021,049 Total $ 18,531,715 $ 18,355,111 NOTE 3. INVESTMENT SECURITIES (continued) Contractual maturities of the Company’s debt securities held-to-maturity at March 31, 2017 were as follows: Amortized Cost Fair Value (in thousands) Due after 10 years $ 1,621,221 $ 1,594,256 Total $ 1,621,221 $ 1,594,256
Gross Unrealized Loss and Fair Value of Securities Available-for-Sale	The following tables present the aggregate amount of unrealized losses as of March 31, 2017 and December 31, 2016 on securities in the Company’s available-for-sale investment portfolios classified according to the amount of time those securities have been in a continuous loss position: March 31, 2017 Less than 12 months 12 months or longer Total Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses (in thousands) U.S. Treasury securities $ 1,280,641 $ (2,435 ) $ — $ — $ 1,280,641 $ (2,435 ) ABS 60,499 (868 ) 119,558 (1,584 ) 180,057 (2,452 ) Equity securities 820 (18 ) 9,785 (565 ) 10,605 (583 ) MBS: U.S. government agencies - Residential 3,349,662 (43,591 ) 993,213 (13,988 ) 4,342,875 (57,579 ) U.S. government agencies - Commercial 550,972 (5,148 ) 95,294 (4,050 ) 646,266 (9,198 ) FHLMC and FNMA - Residential debt securities 4,715,186 (50,045 ) 1,897,958 (94,573 ) 6,613,144 (144,618 ) FHLMC and FNMA - Commercial debt securities 22,354 (651 ) 461 (9 ) 22,815 (660 ) Total investment securities available-for-sale $ 9,980,134 $ (102,756 ) $ 3,116,269 $ (114,769 ) $ 13,096,403 $ (217,525 ) December 31, 2016 Less than 12 months 12 months or longer Total Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses (in thousands) U.S. Treasury securities $ 1,016,654 $ (2,326 ) $ — $ — $ 1,016,654 $ (2,326 ) Corporate debt securities — — — — — — ABS 76,552 (1,021 ) 111,758 (1,367 ) 188,310 (2,388 ) Equity securities 770 (16 ) 9,800 (549 ) 10,570 (565 ) State and municipal securities — — — — — — MBS: U.S. government agencies - Residential 3,831,354 (46,846 ) 1,027,609 (17,691 ) 4,858,963 (64,537 ) U.S. government agencies - Commercial 532,334 (4,451 ) 98,918 (3,745 ) 631,252 (8,196 ) FHLMC and FNMA - Residential debt securities 4,740,824 (58,514 ) 1,981,886 (96,344 ) 6,722,710 (154,858 ) FHLMC and FNMA - Commercial debt securities 22,504 (659 ) 462 (11 ) 22,966 (670 ) Total investment securities available-for-sale $ 10,220,992 $ (113,833 ) $ 3,230,433 $ (119,707 ) $ 13,451,425 $ (233,540 )
Gross Unrealized Loss and Fair Value of Securities Held-to-maturity	The following tables present the aggregate amount of unrealized losses as of March 31, 2017 and December 31, 2016 on securities in the Company’s held-to-maturity investment portfolios classified according to the amount of time those securities have been in a continuous loss position: March 31, 2017 Less than 12 months 12 months or longer Total Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses (in thousands) MBS: U.S. government agencies - Residential $ 1,310,387 $ (28,442 ) $ — $ — $ 1,310,387 $ (28,442 ) Total investment securities held-to-maturity $ 1,310,387 $ (28,442 ) $ — $ — $ 1,310,387 $ (28,442 ) December 31, 2016 Less than 12 months 12 months or longer Total Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses (in thousands) MBS: U.S. government agencies - Residential $ 1,311,390 $ (25,426 ) $ — $ — $ 1,311,390 $ (25,426 ) Total investment securities held-to-maturity $ 1,311,390 $ (25,426 ) $ — $ — $ 1,311,390 $ (25,426 )
Gains (Losses) and Proceeds on Sales of Securities	Proceeds from sales of investment securities and the realized gross gains and losses from those sales are as follows: Three-Month Period Ended March 31, 2017 2016 (in thousands) Proceeds from the sales of available-for-sale securities $ — $ 3,435,844 Gross realized gains $ — $ 26,707 Gross realized losses — (276 ) OTTI — (10 ) Net realized gains (1) $ — $ 26,421 (1) Excludes the net realized gains/(losses) related to Trading Securities.

LOANS AND ALLOWANCE FOR CREDI29

LOANS AND ALLOWANCE FOR CREDIT LOSSES (Tables)	3 Months Ended
	Mar. 31, 2017
Loans and Leases Receivable Disclosure [Abstract]
Schedule of Loans Receivable	The following presents the composition of the gross loans and leases held-for-investment by portfolio and by rate type: March 31, 2017 December 31, 2016 Amount Percent Amount Percent (dollars in thousands) Commercial loans held-for-investment (“LHFI”): Commercial real estate loans $ 9,883,926 11.8 % $ 10,112,043 11.8 % Commercial and industrial loans 17,218,865 20.6 % 18,812,002 21.9 % Multifamily loans 8,462,464 10.1 % 8,683,680 10.1 % Other commercial (2) 6,746,717 8.0 % 6,832,403 8.0 % Total commercial LHFI 42,311,972 50.5 % 44,440,128 51.8 % Consumer loans secured by real estate: Residential mortgages 7,801,175 9.3 % 7,775,272 9.1 % Home equity loans and lines of credit 5,941,340 7.1 % 6,001,192 7.0 % Total consumer loans secured by real estate 13,742,515 16.4 % 13,776,464 16.1 % Consumer loans not secured by real estate: RICs and auto loans - originated 22,729,892 27.2 % 22,104,918 25.8 % RICs and auto loans - purchased 2,976,567 3.6 % 3,468,803 4.0 % Personal unsecured loans 1,211,922 1.4 % 1,234,094 1.4 % Other consumer (3) 742,032 0.9 % 795,378 0.9 % Total consumer loans 41,402,928 49.5 % 41,379,657 48.2 % Total LHFI (1) $ 83,714,900 100.0 % $ 85,819,785 100.0 % Total LHFI: Fixed rate $ 50,822,537 60.7 % $ 51,752,761 60.3 % Variable rate 32,892,363 39.3 % 34,067,024 39.7 % Total LHFI (1) $ 83,714,900 100.0 % $ 85,819,785 100.0 % (1) Total LHFI includes deferred loan fees, net of deferred origination costs and unamortized purchase premiums, net of discounts as well as purchase accounting adjustments. These items resulted in a net increase in the loan balances of $968.3 million and $845.8 million as of March 31, 2017 and December 31, 2016 , respectively. (2) Other commercial includes $3.6 billion and $3.7 billion at March 31, 2017 and December 31, 2016 , respectively, of loans not defined as commercial or consumer for regulatory purposes, but which are defined as "Other." The remainder of the balance primarily includes commercial equipment vehicle financing ("CEVF") leveraged leases and loans. (3) Other consumer primarily includes recreational vehicle ("RV") and marine loans.
Financing Receivable, Recorded Investment [Line Items]
Schedule of Loans by Credit Quality Indicators	Consumer financing receivables for which either an internal or external credit score is a core component of the allowance model are summarized by credit score as follows: March 31, 2017 December 31, 2016 Credit Score Range (2) RICs and auto loans (3) Percent RICs and auto loans (3) Percent (dollars in thousands) No FICO ®(1) $ 4,594,478 17.4 % $ 4,154,228 15.7 % <600 13,870,322 52.3 % 14,100,215 53.2 % 600-639 4,474,020 16.9 % 4,597,541 17.4 % >=640 3,540,719 13.4 % 3,646,485 13.7 % Total $ 26,479,539 100.0 % $ 26,498,469 100.0 % (1) Consists primarily of loans for which credit scores are not considered in the ALLL model. (2) Credit scores updated quarterly. (3) RICs and auto loans include $773.1 million and $924.7 million of LHFS at March 31, 2017 and December 31, 2016 that do not have an allowance.
Allowance for Credit Losses by Portfolio Segment	The activity in the ACL by portfolio segment for the three-month period ended March 31, 2017 and 2016 was as follows: Three-Month Period Ended March 31, 2017 Commercial Consumer Unallocated Total (in thousands) ALLL, beginning of period $ 449,835 $ 3,317,606 $ 47,023 $ 3,814,464 Provision for loan and lease losses 18,777 718,558 — 737,335 Charge-offs (26,173 ) (1,237,280 ) — (1,263,453 ) Recoveries 10,580 623,937 — 634,517 Charge-offs, net of recoveries (15,593 ) (613,343 ) — (628,936 ) ALLL, end of period $ 453,019 $ 3,422,821 $ 47,023 $ 3,922,863 Reserve for unfunded lending commitments, beginning of period $ 121,613 $ 806 $ — $ 122,419 Provision for unfunded lending commitments (1,860 ) (30 ) — (1,890 ) Loss on unfunded lending commitments (133 ) — — (133 ) Reserve for unfunded lending commitments, end of period 119,620 776 — 120,396 Total ACL, end of period $ 572,639 $ 3,423,597 $ 47,023 $ 4,043,259 Ending balance, individually evaluated for impairment (1) $ 99,914 $ 1,518,545 $ — $ 1,618,459 Ending balance, collectively evaluated for impairment 353,105 1,904,276 47,023 2,304,404 Financing receivables: Ending balance $ 42,415,806 $ 43,402,053 $ — $ 85,817,859 Ending balance, evaluated under the FVO or lower of cost or fair value 103,834 2,008,152 — 2,111,986 Ending balance, individually evaluated for impairment (1) 675,116 6,040,694 — 6,715,810 Ending balance, collectively evaluated for impairment 41,636,856 35,353,207 — 76,990,063 (1) Consists of loans in TDR status. NOTE 4. LOANS AND ALLOWANCE FOR CREDIT LOSSES (continued) Three-Month Period Ended March 31, 2016 Commercial Consumer Unallocated Total (in thousands) ALLL, beginning of period $ 456,812 $ 2,742,088 $ 47,245 $ 3,246,145 Provision for loan and lease losses 117,933 755,982 — 873,915 Charge-offs (43,009 ) (1,142,160 ) — (1,185,169 ) Recoveries 25,907 607,065 — 632,972 Charge-offs, net of recoveries (17,102 ) (535,095 ) — (552,197 ) ALLL, end of period $ 557,643 $ 2,962,975 $ 47,245 $ 3,567,863 Reserve for unfunded lending commitments, beginning of period $ 148,207 $ 814 $ — $ 149,021 Provision for unfunded lending commitments 24,621 (74 ) — 24,547 Reserve for unfunded lending commitments, end of period 172,828 740 — 173,568 Total ACL, end of period $ 730,471 $ 2,963,715 $ 47,245 $ 3,741,431 Ending balance, individually evaluated for impairment (2) $ 140,463 $ 1,024,070 $ — $ 1,164,533 Ending balance, collectively evaluated for impairment 417,180 1,938,905 47,245 2,403,330 Financing receivables: Ending balance $ 47,432,421 $ 43,712,054 $ — $ 91,144,475 Ending balance, evaluated under the fair value option or lower of cost or fair value (1) — 2,834,770 — 2,834,770 Ending balance, individually evaluated for impairment (2) 745,842 4,703,087 — 5,448,929 Ending balance, collectively evaluated for impairment 46,686,579 36,174,197 — 82,860,776 (1) Consists of loans in TDR status. NOTE 4. LOANS AND ALLOWANCE FOR CREDIT LOSSES (continued) The following table presents the activity in the allowance for loan losses for the RICs acquired in the Change in Control and those originated by SC subsequent to the Change in Control. Three-Month Period Ended March 31, 2017 Purchased Originated Total (in thousands) ALLL, beginning of period $ 559,092 $ 2,538,127 $ 3,097,219 Provision for / (release of) loan and lease losses 26,125 660,524 686,649 Charge-offs (188,686 ) (1,008,053 ) (1,196,739 ) Recoveries 98,690 517,286 615,976 Charge-offs, net of recoveries (89,996 ) (490,767 ) (580,763 ) ALLL, end of period $ 495,221 $ 2,707,884 $ 3,203,105 Three-Month Period Ended March 31, 2016 Purchased Originated Total (in thousands) ALLL, beginning of period $ 590,807 $ 1,891,989 $ 2,482,796 Provision for / (release of) loan and lease losses 73,635 674,420 748,055 Charge-offs (264,792 ) (825,080 ) (1,089,872 ) Recoveries 189,457 395,941 585,398 Charge-offs, net of recoveries (75,335 ) (429,139 ) (504,474 ) ALLL, end of period $ 589,107 $ 2,137,270 $ 2,726,377
Schedule of Non-accrual Loans	The recorded investment in non-accrual loans disaggregated by class of financing receivables and other non-performing assets is summarized as follows: March 31, 2017 December 31, 2016 (in thousands) Non-accrual loans: Commercial: Commercial real estate: Corporate banking $ 90,858 $ 104,879 Middle market commercial real estate 65,395 71,264 Santander real estate capital 1,620 3,077 Commercial and industrial 211,507 182,368 Multifamily 5,034 8,196 Other commercial 6,081 11,097 Total commercial loans 380,495 380,881 Consumer: Residential mortgages 278,627 287,140 Home equity loans and lines of credit 113,395 120,065 RICs and auto loans - originated 1,471,741 1,045,587 RICs - purchased 350,367 284,486 Personal unsecured loans 5,249 5,201 Other consumer 11,400 12,694 Total consumer loans 2,230,779 1,755,173 Total non-accrual loans 2,611,274 2,136,054 Other real estate owned ("OREO") 117,845 116,705 Repossessed vehicles 178,747 173,754 Foreclosed and other repossessed assets 1,541 3,838 Total OREO and other repossessed assets 298,133 294,297 Total non-performing assets $ 2,909,407 $ 2,430,351
Aging Analysis of Loan Portfolio	The age of recorded investments in past due loans and accruing loans greater than 90 days past due disaggregated by class of financing receivables is summarized as follows: As of: March 31, 2017 30-89 Greater Total Current Total (1) Recorded Investment (in thousands) Commercial: Commercial real estate: Corporate banking $ 28,982 $ 37,630 $ 66,612 $ 3,438,480 $ 3,505,092 $ — Middle market commercial real estate 6,856 48,559 55,415 5,150,561 5,205,976 — Santander real estate capital — — — 1,172,858 1,172,858 — Commercial and industrial 112,319 37,295 149,614 17,173,085 17,322,699 — Multifamily 1,064 762 1,826 8,460,638 8,462,464 — Other commercial 31,996 2,948 34,944 6,711,773 6,746,717 — Consumer: Residential mortgages 192,400 216,636 409,036 7,639,079 8,048,115 — Home equity loans and lines of credit 35,718 71,770 107,488 5,833,852 5,941,340 — RICs and auto loans - originated 3,089,483 230,331 3,319,814 20,183,159 23,502,973 — RICs and auto loans - purchased 728,397 45,630 774,027 2,202,539 2,976,566 — Personal unsecured loans 97,675 92,484 190,159 2,000,868 2,191,027 82,641 Other consumer 25,271 17,019 42,290 699,742 742,032 — Total $ 4,350,161 $ 801,064 $ 5,151,225 $ 80,666,634 $ 85,817,859 $ 82,641 (1) Financing receivables include LHFS. NOTE 4. LOANS AND ALLOWANCE FOR CREDIT LOSSES (continued) As of December 31, 2016 30-89 Greater Total Current Total (1) Recorded (in thousands) Commercial: Commercial real estate: Corporate banking $ 14,973 $ 40,170 $ 55,143 $ 3,637,966 $ 3,693,109 $ — Middle market commercial real estate 6,967 57,520 64,487 5,116,085 5,180,572 — Santander real estate capital 177 — 177 1,238,185 1,238,362 — Commercial and industrial 46,104 33,800 79,904 18,853,163 18,933,067 — Multifamily 7,133 2,339 9,472 8,674,208 8,683,680 — Other commercial 45,379 2,590 47,969 6,784,434 6,832,403 1 Consumer: Residential mortgages 230,850 224,790 455,640 7,782,525 8,238,165 — Home equity loans and lines of credit 37,209 75,668 112,877 5,888,315 6,001,192 — RICs and auto loans - originated 3,092,841 296,085 3,388,926 19,640,740 23,029,666 — RICs and auto loans - purchased 800,993 71,273 872,266 2,596,537 3,468,803 — Personal unsecured loans 89,524 103,698 193,222 2,118,474 2,311,696 93,845 Other consumer 31,980 20,386 52,366 743,012 795,378 — Total $ 4,404,130 $ 928,319 $ 5,332,449 $ 83,073,644 $ 88,406,093 $ 93,846 (1) Financing receivables include LHFS.
Schedule of Impaired Loans by Class	Impaired loans disaggregated by class of financing receivables are summarized as follows: March 31, 2017 Recorded Investment (1) Unpaid Related Average (in thousands) With no related allowance recorded: Commercial: Commercial real estate: Corporate banking $ 82,140 $ 91,678 $ — $ 85,577 Middle market commercial real estate 52,105 75,192 — 56,096 Santander real estate capital 1,182 1,182 — 1,900 Commercial and industrial 72,633 76,705 — 70,384 Multifamily 2,196 3,172 — 6,283 Other commercial 735 735 — 887 Consumer: Residential mortgages 171,106 218,414 — 173,088 Home equity loans and lines of credit 46,872 46,872 — 47,872 RICs and auto loans - originated — — — — RICs and auto loans - purchased 28,138 36,061 — 31,256 Personal unsecured loans (2) 24,382 24,382 — 25,195 Other consumer 20,386 24,702 — 19,861 With an allowance recorded: Commercial: Commercial real estate: Corporate banking 77,692 81,845 22,305 79,066 Middle market commercial real estate 41,805 60,761 9,255 46,038 Santander real estate capital 8,528 8,528 1,240 8,560 Commercial and industrial 251,976 265,864 64,723 234,277 Multifamily 6,973 6,973 1,115 4,952 Other commercial 7,472 7,472 1,276 7,345 Consumer: Residential mortgages 285,786 324,894 38,708 285,208 Home equity loans and lines of credit 50,948 64,228 3,069 50,405 RICs and auto loans - originated 3,723,717 3,800,829 1,048,383 3,497,517 RICs and auto loans - purchased 1,660,016 1,876,086 418,907 1,757,982 Personal unsecured loans 16,961 17,173 7,162 16,910 Other consumer 12,391 16,443 2,316 12,742 Total: Commercial $ 605,437 $ 680,107 $ 99,914 $ 601,365 Consumer 6,040,703 6,450,084 1,518,545 5,918,036 Total $ 6,646,140 $ 7,130,191 $ 1,618,459 $ 6,519,401 (1) Recorded investment includes deferred loan fees, net of deferred origination costs and unamortized purchase premiums, net of discounts as well as purchase accounting adjustments. (2) Includes LHFS. NOTE 4. LOANS AND ALLOWANCE FOR CREDIT LOSSES (continued) The Company recognized interest income, not including the impact of purchase accounting adjustments, of $240.9 million for the three-month period ended March 31, 2017 on approximately $4.7 billion of TDRs that were returned to performing status as of March 31, 2017 . December 31, 2016 Recorded Investment (1) Unpaid Related Average (in thousands) With no related allowance recorded: Commercial: Commercial real estate: Corporate banking $ 89,014 $ 106,212 $ — $ 93,495 Middle market commercial real estate 60,086 83,173 — 69,206 Santander real estate capital 2,618 2,618 — 2,717 Commercial and industrial 68,135 74,034 — 40,163 Multifamily 10,370 11,127 — 9,919 Other commercial 1,038 1,038 — 639 Consumer: Residential mortgages 175,070 222,142 — 160,373 Home equity loans and lines of credit 48,872 48,872 — 39,976 RICs and auto loans - originated — — — 8 RICs and auto loans - purchased 34,373 44,296 — 55,036 Personal unsecured loans (2) 26,008 26,008 — 19,437 Other consumer 19,335 23,864 — 15,915 With an allowance recorded: Commercial: Corporate banking 80,440 85,309 21,202 71,667 Middle market commercial real estate 50,270 66,059 12,575 44,158 Santander real estate capital 8,591 8,591 890 4,623 Commercial and industrial 216,578 232,204 57,855 166,999 Multifamily 2,930 2,930 876 4,292 Other commercial 7,218 7,218 5,198 5,217 Consumer: Residential mortgages 284,630 324,188 38,764 303,845 Home equity loans and lines of credit 49,862 63,775 3,467 60,855 RICs and auto loans - originated 3,271,316 3,332,297 997,169 2,298,646 RICs and auto loans - purchased 1,855,948 2,097,520 471,687 2,155,028 Personal unsecured loans 16,858 17,126 6,846 9,349 Other consumer 13,093 17,253 2,442 15,878 Total: Commercial $ 597,288 $ 680,513 $ 98,596 $ 513,095 Consumer 5,795,365 6,217,341 1,520,375 5,134,346 Total $ 6,392,653 $ 6,897,854 $ 1,618,971 $ 5,647,441 (1) Recorded investment includes deferred loan fees, net of deferred origination costs and unamortized purchase premiums, net of discounts as well as purchase accounting adjustments. (2) Includes LHFS.
Schedule of Financing Receivable by LTV	110% Grand Total FICO ® Score (dollars in thousands) N/A (1) $ 166,218 $ 338 $ 12 $ — $ — $ 166,568 <600 9,696 165,358 66,917 16,409 13,164 271,544 600-639 7,033 148,208 71,034 11,296 9,047 246,618 640-679 7,464 266,495 145,082 25,999 15,754 460,794 680-719 8,942 461,925 272,541 38,428 20,930 802,766 720-759 10,061 647,477 384,010 43,253 25,126 1,109,927 >=760 19,283 1,784,699 933,309 94,962 50,870 2,883,123 Grand Total $ 228,697 $ 3,474,500 $ 1,872,905 $ 230,347 $ 134,891 $ 5,941,340 (1) Residential mortgages and home equity loans and lines of credit in the "N/A" range for LTV or FICO ® score primarily represent the balance on loans serviced by others, in run-off portfolios or for which a current LTV or FICO ® score is unavailable. (2) Allowance model considers LTV for financing receivables in first lien position for the Company and CLTV for financing receivables in second lien position for the Company. Residential Mortgages (1)(3) December 31, 2016 N/A (2) LTV<=70% 70.01-80% 80.01-90% 90.01-100% 100.01-110% LTV>110% Grand Total FICO ® Score (dollars in thousands) N/A (2) $ 696,730 $ 102,911 $ 4,635 $ 2,327 $ 196 $ 150 $ — $ 806,949 <600 80 228,794 70,793 49,253 30,720 6,622 5,885 392,147 600-639 147 152,728 48,006 42,443 42,356 4,538 6,675 296,893 640-679 98 283,054 101,495 81,669 93,552 5,287 4,189 569,344 680-719 112 487,257 193,351 136,937 146,090 6,766 11,795 982,308 720-759 56 767,192 348,524 163,163 178,264 8,473 16,504 1,482,176 >=760 495 2,415,542 860,582 219,014 180,841 11,134 20,740 3,708,348 Grand Total $ 697,718 $ 4,437,478 $ 1,627,386 $ 694,806 $ 672,019 $ 42,970 $ 65,788 $ 8,238,165 (1) Includes LHFS. (2) Residential mortgages and home equity loans and lines of credit in the "N/A" range for LTV or FICO ® score primarily represent the balance on loans serviced by others, in run-off portfolios or for which a current LTV or FICO ® score is unavailable. (3) Allowance model considers LTV for financing receivables in first lien position for the Company and CLTV for financing receivables in second lien position for the Company. Home Equity Loans and Lines of Credit (2) December 31, 2016 N/A (1) LTV<=70% 70.01-90% 90.01-110% LTV>110% Grand Total FICO ® Score (dollars in thousands) N/A (1) $ 172,836 $ 530 $ 157 $ — $ — $ 173,523 <600 10,198 166,702 64,446 14,474 12,684 268,504 600-639 7,323 143,666 68,415 16,680 8,873 244,957 640-679 10,225 278,913 139,940 27,823 14,127 471,028 680-719 11,507 461,285 271,264 39,668 25,158 808,882 720-759 12,640 662,217 383,186 45,496 28,608 1,132,147 >=760 25,425 1,814,060 919,295 94,522 48,849 2,902,151 Grand Total $ 250,154 $ 3,527,373 $ 1,846,703 $ 238,663 $ 138,299 $ 6,001,192 (1) Residential mortgages and home equity loans and lines of credit in the "N/A" range for LTV or FICO ® score primarily represent the balance on loans serviced by others, in run-off portfolios or for which a current LTV or FICO ® score is unavailable. (2) Allowance model considers LTV for financing receivables in first lien position for the Company and CLTV for financing receivables in second lien position for the Company." id="sjs-B11">Residential mortgage and home equity financing receivables by LTV and FICO ® range are summarized as follows: Residential Mortgages (1)(3) March 31, 2017 N/A (2) LTV<=70% 70.01-80% 80.01-90% 90.01-100% 100.01-110% LTV>110% Grand Total FICO ® Score (dollars in thousands) N/A (2) $ 299,444 $ 22,518 $ 15,738 $ 4,435 $ 3,630 $ — $ — $ 345,765 <600 74 249,791 67,644 47,400 29,611 3,899 4,297 402,716 600-639 49 155,608 48,930 39,284 34,524 4,928 5,547 288,870 640-679 153 315,898 99,914 84,830 95,600 5,320 8,635 610,350 680-719 49 529,557 211,825 134,939 141,692 5,622 11,651 1,035,335 720-759 16 842,347 397,595 160,548 152,397 8,308 13,715 1,574,926 >=760 516 2,491,175 857,462 229,408 184,825 10,184 16,583 3,790,153 Grand Total $ 300,301 $ 4,606,894 $ 1,699,108 $ 700,844 $ 642,279 $ 38,261 $ 60,428 $ 8,048,115 (1) Includes LHFS. (2) Residential mortgages and home equity loans and lines of credit in the "N/A" range for LTV or FICO ® score primarily represent the balance on loans serviced by others, in run-off portfolios or for which a current LTV or FICO ® score is unavailable. (3) Allowance model considers LTV for financing receivables in first lien position for the Company and combined LTV ("CLTV") for financing receivables in second lien position for the Company. NOTE 4. LOANS AND ALLOWANCE FOR CREDIT LOSSES (continued) Home Equity Loans and Lines of Credit (2) March 31, 2017 N/A (1) LTV<=70% 70.01-90% 90.01-110% LTV>110% Grand Total FICO ® Score (dollars in thousands) N/A (1) $ 166,218 $ 338 $ 12 $ — $ — $ 166,568 <600 9,696 165,358 66,917 16,409 13,164 271,544 600-639 7,033 148,208 71,034 11,296 9,047 246,618 640-679 7,464 266,495 145,082 25,999 15,754 460,794 680-719 8,942 461,925 272,541 38,428 20,930 802,766 720-759 10,061 647,477 384,010 43,253 25,126 1,109,927 >=760 19,283 1,784,699 933,309 94,962 50,870 2,883,123 Grand Total $ 228,697 $ 3,474,500 $ 1,872,905 $ 230,347 $ 134,891 $ 5,941,340 (1) Residential mortgages and home equity loans and lines of credit in the "N/A" range for LTV or FICO ® score primarily represent the balance on loans serviced by others, in run-off portfolios or for which a current LTV or FICO ® score is unavailable. (2) Allowance model considers LTV for financing receivables in first lien position for the Company and CLTV for financing receivables in second lien position for the Company. Residential Mortgages (1)(3) December 31, 2016 N/A (2) LTV<=70% 70.01-80% 80.01-90% 90.01-100% 100.01-110% LTV>110% Grand Total FICO ® Score (dollars in thousands) N/A (2) $ 696,730 $ 102,911 $ 4,635 $ 2,327 $ 196 $ 150 $ — $ 806,949 <600 80 228,794 70,793 49,253 30,720 6,622 5,885 392,147 600-639 147 152,728 48,006 42,443 42,356 4,538 6,675 296,893 640-679 98 283,054 101,495 81,669 93,552 5,287 4,189 569,344 680-719 112 487,257 193,351 136,937 146,090 6,766 11,795 982,308 720-759 56 767,192 348,524 163,163 178,264 8,473 16,504 1,482,176 >=760 495 2,415,542 860,582 219,014 180,841 11,134 20,740 3,708,348 Grand Total $ 697,718 $ 4,437,478 $ 1,627,386 $ 694,806 $ 672,019 $ 42,970 $ 65,788 $ 8,238,165 (1) Includes LHFS. (2) Residential mortgages and home equity loans and lines of credit in the "N/A" range for LTV or FICO ® score primarily represent the balance on loans serviced by others, in run-off portfolios or for which a current LTV or FICO ® score is unavailable. (3) Allowance model considers LTV for financing receivables in first lien position for the Company and CLTV for financing receivables in second lien position for the Company. Home Equity Loans and Lines of Credit (2) December 31, 2016 N/A (1) LTV<=70% 70.01-90% 90.01-110% LTV>110% Grand Total FICO ® Score (dollars in thousands) N/A (1) $ 172,836 $ 530 $ 157 $ — $ — $ 173,523 <600 10,198 166,702 64,446 14,474 12,684 268,504 600-639 7,323 143,666 68,415 16,680 8,873 244,957 640-679 10,225 278,913 139,940 27,823 14,127 471,028 680-719 11,507 461,285 271,264 39,668 25,158 808,882 720-759 12,640 662,217 383,186 45,496 28,608 1,132,147 >=760 25,425 1,814,060 919,295 94,522 48,849 2,902,151 Grand Total $ 250,154 $ 3,527,373 $ 1,846,703 $ 238,663 $ 138,299 $ 6,001,192 (1) Residential mortgages and home equity loans and lines of credit in the "N/A" range for LTV or FICO ® score primarily represent the balance on loans serviced by others, in run-off portfolios or for which a current LTV or FICO ® score is unavailable. (2) Allowance model considers LTV for financing receivables in first lien position for the Company and CLTV for financing receivables in second lien position for the Company.
Summary of Performing and Non-performing TDRs	The following table summarizes the Company’s performing and non-performing TDRs at the dates indicated: March 31, 2017 December 31, 2016 (in thousands) Performing $ 4,734,246 $ 5,169,788 Non-performing 1,644,947 937,127 Total $ 6,379,193 $ 6,106,915
Schedule of Troubled Debt Restructurings	The following tables detail the activity of TDRs for the three-month period ended March 31, 2017 and March 31, 2016 , respectively: Three-Month Period Ended March 31, 2017 Number of Pre-TDR Recorded (1) Term Extension Principal Forbearance Other (4) Post-TDR Recorded Investment (2) (dollars in thousands) Commercial: Commercial real estate: Corporate Banking 24 $ 30,001 $ (2 ) $ 1 $ 340 $ 30,340 Commercial and industrial 242 8,034 (4 ) — — 8,030 Consumer: Residential mortgages (3) 89 15,993 — — (183 ) 15,810 Home equity loans and lines of credit 19 1,432 — — 121 1,553 RICs and auto loans - originated 50,910 906,599 (934 ) — (107 ) 905,558 RICs - purchased 55 289 (5 ) — (2 ) 282 Personal unsecured loans 17,757 24,855 — — (109 ) 24,746 Other consumer 59 2,118 — — (1 ) 2,117 Total 69,155 $ 989,321 $ (945 ) $ 1 $ 59 $ 988,436 (1) Pre-TDR modification outstanding recorded investment amount is the month-end balance prior to the month in which the modification occurred. (2) Post-TDR modification outstanding recorded investment amount is the month-end balance for the month in which the modification occurred. (3) The post-TDR modification outstanding recorded investment amounts for residential mortgages exclude interest reserves. (4) Other modifications may include modifications such as interest rate reductions, fee waivers, or capitalization of fees. NOTE 4. LOANS AND ALLOWANCE FOR CREDIT LOSSES (continued) Three-Month Period Ended March 31, 2016 Number of Pre-TDR Recorded (1) Term Extension Principal Forbearance Other (4) Post-TDR Recorded Investment (2) (dollars in thousands) Commercial: Commercial real estate: Corporate Banking 9 $ 47,776 $ (16 ) $ (10,583 ) $ (11 ) $ 37,166 Middle market commercial real estate 3 10,454 — — (69 ) 10,385 Commercial and industrial 223 7,230 (1 ) — — 7,229 Consumer: Residential mortgages (3) 49 6,648 (1 ) — 205 6,852 Home equity loans and lines of credit 67 4,539 132 — (237 ) 4,434 RICs and auto loans - originated 27,695 514,066 (83 ) — (61 ) 513,922 RICs - purchased 14,344 175,968 (598 ) — (59 ) 175,311 Personal unsecured loans 17,055 21,345 — — (129 ) 21,216 Other consumer 26 923 — — (178 ) 745 Total 59,471 $ 788,949 $ (567 ) $ (10,583 ) $ (539 ) $ 777,260 (1) Pre-TDR modification outstanding recorded investment amount is the month-end balance prior to the month in which the modification occurred. (2) Post-TDR modification outstanding recorded investment amount is the month-end balance for the month in which the modification occurred. (3) The post-TDR modification outstanding recorded investment amounts for residential mortgages exclude interest reserves. (4) Other modifications may include modifications such as interest rate reductions, fee waivers, or capitalization of fees.
Schedule of Troubled Debt Restructurings Subsequently Defaulted	The following table details period-end recorded investment balances of TDRs that became TDRs during the past twelve-month period and have subsequently defaulted during the three-month period ended March 31, 2017 and March 31, 2016 , respectively. Three-Month Period Ended March 31, 2017 2016 Number of Recorded Investment (1) Number of Recorded Investment (1) (dollars in thousands) Commercial Corporate Banking 3 $ 1,278 2 $ 1,238 Middle Market Commercial Real Estate 32 6,443 20 3,746 Commercial and industrial 66 2,887 63 4,009 Consumer: Residential mortgages 29 4,161 31 4,838 Home equity loans and lines of credit 2 173 5 341 RICs and auto loans 12,281 214,002 13,124 214,702 Unsecured loans 874 1,707 1,599 1,827 Other consumer 9 105 6 73 Total 13,296 $ 230,756 14,850 $ 230,774 (1) The recorded investment represents the period-end balance at March 31, 2017 and 2016 . Does not include Chapter 7 bankruptcy TDRs.
Commercial
Financing Receivable, Recorded Investment [Line Items]
Schedule of Loans by Credit Quality Indicators	The following table reconciles the Company's recorded investment classified by its major portfolio classifications to its commercial loan classifications utilized in its determination of the allowance for loan and lease losses (“ALLL”) and other credit quality disclosures at March 31, 2017 and December 31, 2016 , respectively: Commercial Portfolio Segment (2) Major Loan Classifications (1) March 31, 2017 December 31, 2016 (in thousands) Commercial LHFI: Commercial real estate: Corporate Banking $ 3,505,092 $ 3,693,109 Middle Market Real Estate 5,205,976 5,180,572 Santander Real Estate Capital 1,172,858 1,238,362 Total commercial real estate 9,883,926 10,112,043 Commercial and industrial (3) 17,218,865 18,812,002 Multifamily 8,462,464 8,683,680 Other commercial 6,746,717 6,832,403 Total commercial LHFI $ 42,311,972 $ 44,440,128 (1) These represent the Company's loan categories based on SEC Regulation S-X, Article 9. (2) These represent the Company's loan classes used to determine its ALLL. (3) Commercial and industrial loans excluded $103.8 million of LHFS at March 31, 2017 and excluded $121.1 million of LHFS at December 31, 2016 . Commercial loan credit quality indicators by class of financing receivables are summarized as follows: March 31, 2017 Corporate Middle Santander Commercial and industrial Multifamily Remaining Total (1) (in thousands) Rating: Pass $ 3,093,468 $ 4,900,103 $ 1,128,619 $ 16,108,106 $ 8,291,861 $ 6,692,843 $ 40,215,000 Special Mention 174,765 138,376 24,719 691,575 130,534 24,145 1,184,114 Substandard 212,428 137,221 19,520 479,397 40,069 29,647 918,282 Doubtful 24,431 30,276 — 43,621 — 82 98,410 Total commercial loans $ 3,505,092 $ 5,205,976 $ 1,172,858 $ 17,322,699 $ 8,462,464 $ 6,746,717 $ 42,415,806 (1) Financing receivables include LHFS. December 31, 2016 Corporate Middle Santander Commercial and industrial Multifamily Remaining Total (1) (in thousands) Rating: Pass $ 3,303,428 $ 4,843,468 $ 1,170,259 $ 17,865,871 $ 8,515,866 $ 6,804,184 $ 42,503,076 Special Mention 144,125 136,989 44,281 541,828 120,731 10,651 998,605 Substandard 226,206 161,962 23,822 503,185 47,083 11,932 974,190 Doubtful 19,350 38,153 — 22,183 — 5,636 85,322 Total commercial loans $ 3,693,109 $ 5,180,572 $ 1,238,362 $ 18,933,067 $ 8,683,680 $ 6,832,403 $ 44,561,193 (1) Financing receivables include LHFS.
Consumer
Financing Receivable, Recorded Investment [Line Items]
Schedule of Loans by Credit Quality Indicators	Consumer Portfolio Segment (2) Major Loan Classifications (1) March 31, 2017 December 31, 2016 (in thousands) Consumer loans secured by real estate: Residential mortgages (3) $ 7,801,175 $ 7,775,272 Home equity loans and lines of credit 5,941,340 6,001,192 Total consumer loans secured by real estate 13,742,515 13,776,464 Consumer loans not secured by real estate: RICs and auto loans - originated (4) 22,729,892 22,104,918 RICs and auto loans - purchased (4) 2,976,567 3,468,803 Personal unsecured loans (5) 1,211,922 1,234,094 Other consumer 742,032 795,378 Total consumer LHFI $ 41,402,928 $ 41,379,657 (1) These represent the Company's loan categories based on the SEC's Regulation S-X, Article 9. (2) These represent the Company's loan classes used to determine its ALLL. (3) Residential mortgages exclude $246.9 million and $462.9 million of LHFS at March 31, 2017 and December 31, 2016 , respectively. (4) RIC and auto loans exclude $773.1 million and $924.7 million of LHFS at March 31, 2017 and December 31, 2016 , respectively. (5) Personal unsecured loans exclude $1.0 billion and $1.1 billion of LHFS at March 31, 2017 and December 31, 2016 , respectively. The composition of the portfolio segment is as follows: March 31, 2017 December 31, 2016 (in thousands) RICs - Purchased: Unpaid principal balance ("UPB") (1) $ 3,216,330 $ 3,765,714 UPB - FVO (2) 17,321 29,481 Total UPB 3,233,651 3,795,195 Purchase Marks (3) (257,084 ) (326,392 ) Total RICs - Purchased 2,976,567 3,468,803 RICs - Originated: UPB (1) 23,112,453 22,527,753 Net discount (400,495 ) (441,131 ) Total RICs - Originated 22,711,958 22,086,622 SBNA auto loans 17,934 18,296 Total RICs - originated post change in control $ 22,729,892 $ 22,104,918 Total RICs and auto loans $ 25,706,459 $ 25,573,721 (1) UPB does not include amounts related to the loan receivables - unsecured and loan receivables from dealers due to the short-term and revolving nature of these receivables. (2) The Company elected to account for these loans, which were acquired with evidence of credit deterioration, under the FVO. (3) Includes purchase marks of $3.7 million and $6.7 million related to purchased loan portfolios on which we elected to apply the FVO at March 31, 2017 and December 31, 2016 , respectively.

OPERATING LEASE ASSETS, NET (Ta

OPERATING LEASE ASSETS, NET (Tables)	3 Months Ended
	Mar. 31, 2017
Leases [Abstract]
Schedule of Leased Vehicles, Net	Operating lease assets, net consisted of the following as of March 31, 2017 and December 31, 2016 : March 31, 2017 December 31, 2016 (in thousands) Leased vehicles $ 13,641,234 $ 13,603,494 Origination fees and other costs 24,156 23,141 Manufacturer subvention payments (1,176,686 ) (1,126,323 ) Leased vehicles, gross 12,488,704 12,500,312 Less: accumulated depreciation (2,752,676 ) (2,811,855 ) Leased vehicles, net $ 9,736,028 $ 9,688,457 Commercial equipment vehicles and aircraft, gross $ 73,041 $ 65,401 Less: accumulated depreciation (9,128 ) (6,635 ) Commercial equipment vehicles and aircraft, net $ 63,913 $ 58,766 Total operating lease assets, net $ 9,799,941 $ 9,747,223
Schedule of Future Minimum Rental Payments Due to the Company Under Operating Leases	The following summarizes the future minimum rental payments due to the Company as lessor under operating leases as of March 31, 2017 (in thousands): 2017 $ 1,288,754 2018 1,113,314 2019 445,105 2020 28,504 2021 79 Thereafter — Total $ 2,875,756

VARIABLE INTEREST ENTITIES (Tab

VARIABLE INTEREST ENTITIES (Tables)	3 Months Ended
	Mar. 31, 2017
Variable Interest Entity and Securitizations [Abstract]
Schedule of Variable Interest Entities	The assets of consolidated VIEs that are included in the Company's Condensed Consolidated Financial Statements , presented based upon the legal transfer of the underlying assets in order to reflect legal ownership, that can be used to settle obligations of the consolidated VIE and the liabilities of these consolidated entities for which creditors (or beneficial interest holders) do not have recourse to our general credit were as follows: March 31, 2017 December 31, 2016 (in thousands) Assets Restricted cash $ 2,437,776 $ 2,087,177 Loans (1) 23,538,934 23,568,066 Operating lease assets, net 8,927,536 8,564,628 Various other assets 705,569 686,253 Total Assets $ 35,609,815 $ 34,906,124 Liabilities Notes payable $ 30,847,859 $ 31,667,976 Various other liabilities 111,075 91,234 Total Liabilities $ 30,958,934 $ 31,759,210 (1) Includes $859.4 million and $1.0 billion of RICs held for sale at March 31, 2017 and December 31, 2016 , respectively.
Summary of Cash Flows Received	Below is a summary of the cash flows received from the on-balance sheet Trusts for the periods indicated: Three-Month Period Ended March 31, 2017 Three-Month Period Ended March 31, 2016 (in thousands) Assets securitized $ 7,646,625 $ 3,657,955 Net proceeds from new securitizations (1) $ 5,576,801 $ 2,702,004 Net proceeds from sale of retained bonds 115,970 — Cash received for servicing fees (2) 208,923 194,365 Net distributions from Trusts (2) 678,229 629,726 Total cash received from Trusts $ 6,579,923 $ 3,526,095 (1) Includes additional advances on existing securitizations. (2) These amounts are not reflected in the accompanying Condensed Consolidated Statements of Cash Flows because the cash flows are between the VIEs and other entities included in the consolidation A summary of the cash flows received from the off-balance sheet Trusts for the periods indicated is as follows: Three-Month Period Ended March 31, 2017 Three-Month Period Ended March 31, 2016 (in thousands) Assets securitized (a) $ 700,022 $ — Net proceeds from new securitizations $ 702,319 $ — Cash received for servicing fees 1,398 15,701 Total cash received from Trusts $ 703,717 $ 15,701 (a) Represents the UPB at the time of original securitization.
Schedule of Off-balance Sheet Variable Interest Entities Portfolio	The portfolio was comprised as follows: March 31, 2017 December 31, 2016 (in thousands) SPAIN $ 666,346 $ — Total serviced for related parties 666,346 — Chrysler Capital securitizations 2,188,452 2,741,101 Other third parties 89,107 — Total serviced for third parties 2,277,559 2,741,101 Total serviced for other portfolio $ 2,943,905 $ 2,741,101

GOODWILL AND OTHER INTANGIBLES

GOODWILL AND OTHER INTANGIBLES (Tables)	3 Months Ended
	Mar. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Goodwill	The following table presents activity in the Company's goodwill by its reportable segments for the three-month period ended March 31, 2017 : Consumer and Business Banking Commercial Real Estate Commercial Banking Global Corporate Banking SC Santander BanCorp Total (in thousands) Goodwill at December 31, 2016 $ 1,880,303 $ 870,411 $ 542,584 $ 131,130 $ 1,019,960 $ 10,537 $ 4,454,925 Disposals during the period — — — — — — — Additions during the period — — — — — — — Re-allocations during the period — — — — — — — Impairment during the period — — — — — — — Goodwill at March 31, 2017 $ 1,880,303 $ 870,411 $ 542,584 $ 131,130 $ 1,019,960 $ 10,537 $ 4,454,925
Schedule of Finite-Lived Intangible Assets	The following table details amounts related to the Company's intangible assets subject to amortization for the dates indicated. March 31, 2017 December 31, 2016 Net Carrying Amount Accumulated Amortization Net Carrying Amount Accumulated Amortization (in thousands) Intangibles subject to amortization: Dealer networks $ 455,821 $ (124,179 ) $ 465,625 $ (114,375 ) Chrysler relationship 91,250 (47,500 ) 95,000 (43,750 ) Core deposit intangibles — — — (295,842 ) Trade name 16,800 (1,200 ) 17,100 (900 ) Other intangibles 17,882 (51,649 ) 19,519 (98,492 ) Total intangibles subject to amortization $ 581,753 $ (224,528 ) $ 597,244 $ (553,359 )
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense	The estimated aggregate amortization expense related to intangibles, excluding any impairment charges, for each of the five succeeding calendar years ending December 31 is: Year Calendar Year Amount Recorded To Date Remaining Amount To Record (in thousands) 2017 $ 61,491 $ 15,491 $ 46,000 2018 60,644 — 60,644 2019 58,975 — 58,975 2020 58,642 — 58,642 2021 55,603 — 55,603 Thereafter 301,889 — 301,889

OTHER ASSETS (Tables)

OTHER ASSETS (Tables)	3 Months Ended
	Mar. 31, 2017
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Schedule of Other Assets	The following is a detail of items that comprise other assets at March 31, 2017 and December 31, 2016 : March 31, 2017 December 31, 2016 (in thousands) Income tax receivables $ 296,305 $ 294,796 Derivative assets at fair value 407,568 413,779 Other repossessed assets 180,288 177,592 MSRs 153,114 150,343 Prepaid expenses 171,836 172,559 OREO 117,845 116,705 Miscellaneous assets and receivables 1,023,530 567,327 Total other assets $ 2,350,486 $ 1,893,101
Schedule of Servicing Assets at Fair Value	The following table presents a summary of activity for the Company's residential MSRs that are included in the Condensed Consolidated Balance Sheets . Three-Month Period Ended March 31, 2017 March 31, 2016 (in thousands) Fair value at beginning of period (1) $ 146,589 $ 147,233 Mortgage servicing assets recognized 5,730 3,592 Principal reductions (4,321 ) (5,726 ) Change in fair value due to valuation assumptions 1,457 (14,356 ) Fair value at end of period (1) $ 149,455 $ 130,743 (1) The Company has total MSRs of $153.1 million and $150.3 million as of March 31, 2017 , and December 31, 2016 , respectively. The Company has elected to account for the majority of its MSR balance using the fair value option, while the remainder of the MSRs are accounted for using the lower of cost or market and are not presented within this table.

DEPOSITS AND OTHER CUSTOMER A34

DEPOSITS AND OTHER CUSTOMER ACCOUNTS (Tables)	3 Months Ended
	Mar. 31, 2017
Deposits [Abstract]
Summary of Deposits and Other Customer Accounts	Deposits and other customer accounts are summarized as follows: March 31, 2017 December 31, 2016 Balance Percent of total deposits Balance Percent of total deposits (in thousands) Interest-bearing demand deposits $ 11,474,772 17.3 % $ 11,284,881 16.8 % Non-interest-bearing demand deposits 15,608,348 23.4 % 15,413,609 22.9 % Savings 6,090,884 9.1 % 5,988,852 8.9 % Customer repurchase accounts 819,783 1.2 % 868,544 1.3 % Money market 24,977,919 37.5 % 24,511,906 36.5 % Certificates of deposit ("CDs") 7,629,528 11.5 % 9,172,898 13.6 % Total Deposits (1) $ 66,601,234 100.0 % $ 67,240,690 100.0 % (1) Includes foreign deposits, as defined by the FRB, of $10.3 billion and $10.7 billion at March 31, 2017 and December 31, 2016 , respectively.

BORROWINGS (Tables)

BORROWINGS (Tables)	3 Months Ended
	Mar. 31, 2017
Santander
Debt Instrument [Line Items]
Schedule of Borrowings and Other Debt Obligation	The following table presents information regarding the Parent Company & other IHC entities' borrowings and other debt obligations at the dates indicated: March 31, 2017 December 31, 2016 Balance Effective Rate Balance Effective Rate (dollars in thousands) Senior notes, due November 2017 (1) $ 599,392 2.59 % $ 599,206 2.67 % 3.45% senior notes, due August 2018 498,809 3.62 % 498,604 3.62 % 2.70% senior notes, due May 2019 997,489 2.82 % 997,207 2.82 % 2.65% senior notes, due April 2020 995,060 2.82 % 994,672 2.82 % 3.70% senior notes, due March 2022 994,651 3.82 % — — % 4.50% senior notes, due July 2025 1,095,077 4.57 % 1,094,955 4.56 % Junior subordinated debentures - Capital Trust VI, due June 2036 69,804 7.91 % 69,798 7.91 % Common securities - Capital Trust VI 10,000 7.91 % 10,000 7.91 % Junior subordinated debentures - Capital Trust IX, due July 2036 149,440 2.84 % 149,434 2.49 % Common securities - Capital Trust IX 4,640 2.84 % 4,640 2.49 % Overnight funds purchase, due April 2017 (2,3) 770 0.81 % 830 0.50 % 2.00% subordinated debt, maturing through 2042 (2) 40,498 2.00 % 40,457 2.00 % Short-term borrowings, due April 2017 (2,3) 91,000 0.88 % 54,000 0.63 % Overnight borrowings, maturing April 2017 (2) 31,000 0.88 % 17,000 0.63 % Short-term borrowings, maturing in less than one year (2) 93,378 0.25 % 207,173 0.25 % Short-term borrowings, maturing in less than one year (2) 3,260 0.35 % — — % Total Parent Company & other subsidiaries` borrowings and other debt obligations $ 5,674,268 3.36 % $ 4,737,976 3.21 % (1) These notes bear interest at a rate equal to three-month LIBOR plus 145 basis points per annum. (2) These debt instruments have been entered into by certain of the SHUSA`s subsidiaries. (3) At December 31, 2016, these amounts were due in January 2017. In January 2017, they were refinanced with a new maturity of April 2017.
Santander Bank
Debt Instrument [Line Items]
Schedule of Borrowings and Other Debt Obligation	The following table presents information regarding the Bank's borrowings and other debt obligations at the dates indicated: March 31, 2017 December 31, 2016 Balance Effective Rate Balance Effective Rate (dollars in thousands) 2.00% senior notes, due January 2018 $ 76,908 2.24 % $ 748,143 2.24 % Senior notes, due January 2018 (1)(2) 41,877 1.95 % 249,705 1.99 % 8.750% subordinated debentures, due May 2018 499,069 8.92 % 498,882 8.92 % Subordinated term loan, due February 2019 116,326 7.01 % 122,313 6.78 % FHLB advances, maturing through July 2019 4,350,000 1.15 % 5,950,000 0.85 % Real estate investment trust preferred, due May 2020 156,842 13.36 % 156,457 13.46 % Subordinated term loan, due August 2022 29,296 8.77 % 29,202 8.35 % Total Bank borrowings and other debt obligations $ 5,270,318 2.44 % $ 7,754,702 1.92 % (1) These notes will bear interest at a rate equal to three-month LIBOR plus 93 basis points per annum. (2) Effective rate of this debt is a proxy to account for the portion of this debt that was repurchased following a tender offer which settled on March 29, 2017.
SC
Debt Instrument [Line Items]
Schedule of Borrowings and Other Debt Obligation	The following tables present information regarding SC's secured structured financings as of March 31, 2017 and December 31, 2016 : March 31, 2017 Balance Initial Note Amounts Issued Initial Weighted Average Interest Rate Range Collateral Restricted Cash (dollars in thousands) SC public securitizations, maturing on various dates (1,2) $ 14,797,166 $ 33,958,912 0.89% - 2.80% $ 19,098,090 $ 1,641,484 SC privately issued amortizing notes, maturing on various dates (1) 8,875,308 12,445,241 0.88% - 2.86% 12,881,108 632,753 Total SC secured structured financings $ 23,672,474 $ 46,404,153 0.88% - 2.86% $ 31,979,198 $ 2,274,237 (1) SC has entered into various securitization transactions involving its retail automobile installment loans and leases. These transactions are accounted for as secured financings and therefore both the securitized RICs, and the related securitization debt issued by SPEs, remain on the Condensed Consolidated Balance Sheets . The maturity of this debt is based on the timing of repayments from the securitized assets. (2) Securitizations executed under Rule 144A of the Securities Act are included within this balance. NOTE 10. BORROWINGS (continued) December 31, 2016 Balance Initial Note Amounts Issued Initial Weighted Average Interest Rate Range Collateral Restricted Cash (dollars in thousands) SC public securitizations, maturing on various dates (1,2) $ 13,444,543 $ 32,386,082 0.89% - 2.46% $ 17,474,524 $ 1,423,599 SC privately issued amortizing notes, maturing on various dates (1) 8,172,407 14,085,991 0.88% - 2.86% 12,021,887 500,868 Total SC secured structured financings $ 21,616,950 $ 46,472,073 0.88% - 2.86% $ 29,496,411 $ 1,924,467 (1) SC has entered into various securitization transactions involving its retail automobile installment loans and leases. These transactions are accounted for as secured financings and therefore both the securitized RICs, and the related securitization debt issued by SPEs, remain on the Condensed Consolidated Balance Sheets . The maturity of this debt is based on the timing of repayments from the securitized assets. (2) Securitizations executed under Rule 144A of the Securities Act are included within this balance. The following tables present information regarding SC's credit facilities as of March 31, 2017 and December 31, 2016 : March 31, 2017 Balance Committed Amount (6) Effective Rate Assets Pledged Restricted Cash Pledged (dollars in thousands) Warehouse line, maturing on various dates (1) $ 232,045 $ 1,250,000 3.73 % $ 326,912 $ 11,207 Warehouse line, due August 2018 (2) 216,520 780,000 3.30 % 281,270 6,946 Warehouse line, due August 2018 (3) 2,018,143 3,120,000 2.29 % 3,067,595 64,912 Warehouse line, due October 2018 (5) 435,477 1,800,000 3.31 % 620,916 10,000 Warehouse line, due October 2018 132,365 400,000 2.91 % 189,416 2,671 Warehouse line, due January 2018 168,084 500,000 2.84 % 213,200 — Warehouse line, due November 2018 301,199 1,000,000 2.51 % 451,750 7,902 Warehouse line, due November 2018 174,720 500,000 2.16 % 186,481 4,722 Warehouse line, due October 2017 273,800 300,000 2.44 % 322,183 10,803 Warehouse line, due July 2018 235,784 250,000 3.25 % 500,095 44,377 Repurchase facility, due December 2017 (4) 328,608 328,608 3.32 % — 14,012 Repurchase facility, due April 2017 (4) 235,509 235,509 2.04 % — — Repurchase facility, due March 2018 (4) 147,182 147,182 3.31 % — — Repurchase facility, due April 2017 (4) 59,202 59,202 2.09 % — — Line of credit with related party, due December 2017 (5) 500,000 500,000 3.24 % — — Line of credit with related party, due December 2017 (5) 1,000,000 1,000,000 2.83 % — — Line of credit with related party, due December 2018 (5) — 500,000 3.89 % — — Line of credit with related party, due December 2018 (5) 400,000 1,000,000 3.36 % — — Total SC revolving credit facilities $ 6,858,638 $ 13,670,501 2.78 % $ 6,159,818 $ 177,552 (1) As of March 31, 2017 , half of the outstanding balance on this facility matures in April 2017 and half matures in March 2018. In April 2017, the facilities that matured were extended to March 2019. (2) This line is held exclusively for financing of Chrysler Capital loans. (3) This line is held exclusively for financing of Chrysler Capital leases. (4) These repurchase facilities are collateralized by securitization notes payable retained by SC. No portion of these facilities are unsecured. These facilities have rolling maturities of up to one year . In April 2017, the repurchase facilities that matured were extended to May 2017. (5) These lines are also collateralized by securitization notes payable and residuals retained by SC. As of March 31, 2017 , $1.6 billion of the aggregate outstanding balances on these credit facilities was unsecured. (6) SPAIN Revolving Funding LLC (a subsidiary) established a committed facility of $750 million with the New York branch of Santander ("Santander NY") on April 3, 2017. Borrowings under this facility bear interest at a rate equal to one-month London Interbank Offered Rate ("LIBOR") plus a spread (based on the quality of the collateral for the facility) ranging from 0.60% to 0.90% . The current maturity date of the facility is December 31, 2018. The committed amounts related to this facility are not included within the table above. NOTE 10. BORROWINGS (continued) December 31, 2016 Balance Committed Amount Effective Assets Pledged Restricted Cash Pledged (dollars in thousands) Warehouse line, maturing on various dates (1) $ 462,085 $ 1,250,000 2.52 % $ 653,014 $ 14,916 Warehouse line, due August 2018 (2) 534,220 780,000 1.98 % 608,025 24,520 Warehouse line, due August 2018 (3) 3,119,943 3,120,000 1.91 % 4,700,774 70,991 Warehouse line, due October 2018 (5) 702,377 1,800,000 2.51 % 994,684 23,378 Warehouse line, due October 2018 202,000 400,000 2.22 % 290,867 5,435 Warehouse line, due January 2018 153,784 500,000 3.17 % 213,578 — Warehouse line, due November 2018 578,999 1,000,000 1.56 % 850,758 17,642 Warehouse line, due October 2017 243,100 300,000 2.38 % 295,045 9,235 Warehouse line, due November 2018 — 500,000 2.07 % — — Repurchase facility, due December 2017 (4) 507,800 507,800 2.83 % — 22,613 Repurchase facility, due April 2017 (4) 235,509 235,509 2.04 % — — Line of credit with related party, due December 2017 (5) 1,000,000 1,000,000 2.86 % — — Line of credit with related party, due December 2017 (5) 500,000 500,000 3.04 % — — Line of credit with related party, due December 2018 (5) 175,000 500,000 3.87 % — — Line of credit with related party, due December 2018 (5) 1,000,000 1,000,000 2.88 % — — Total SC revolving credit facilities $ 9,414,817 $ 13,393,309 2.36 % $ 8,606,745 $ 188,730 (1) As of December 31, 2016 , half of the outstanding balance on this facility matures in March 2017 and half matures in March 2018. (2) This line is held exclusively for financing of Chrysler Capital loans. (3) This line is held exclusively for financing of Chrysler Capital leases. (4) These repurchase facilities are collateralized by securitization notes payable retained by SC. No portion of these facilities are unsecured. These facilities have rolling maturities of up to one year . (5) These lines are also collateralized by securitization notes payable and residuals retained by SC. As of December 31, 2016 , $1.3 billion of the aggregate outstanding balances on these credit facilities was unsecured.

DERIVATIVES (Tables)

DERIVATIVES (Tables)	3 Months Ended
	Mar. 31, 2017
Derivative [Line Items]
Impact of Derivative Activities in the Condensed Consolidated Statement of Operations	The following Condensed Consolidated Statement of Operations line items were impacted by the Company’s derivative activities for the three-month periods ended March 31, 2017 and 2016 : Three-Month Period Ended March 31, Derivative Activity (1) Line Item 2017 2016 (in thousands) Fair value hedges: Cross-currency swaps (2) Miscellaneous income $ — $ 174 Interest rate swaps (2) Miscellaneous income — (4,484 ) Cash flow hedges: Pay fixed-receive variable interest rate swaps Net interest income (2,387 ) (2,663 ) Pay variable receive-fixed interest rate swap Net interest income (2,781 ) — Other derivative activities: Forward commitments to sell loans Mortgage banking income (10,940 ) (3,895 ) Interest rate lock commitments Mortgage banking income 1,994 4,452 Mortgage servicing Mortgage banking income 497 15,070 Customer related derivatives Miscellaneous income (1,887 ) 1,594 Foreign exchange Miscellaneous income 2,260 2,063 Interest rate swaps, caps, and options Miscellaneous income 1,204 (5,499 ) Net interest income 4,730 15,139 Total return settlement Other administrative expenses (505 ) (1,316 ) Other Miscellaneous income (1,501 ) (1,131 ) (1) Gains are disclosed as positive numbers while losses are shown as a negative number regardless of the line item being affected. (2) Cross currency swaps designated as hedges matured in the first quarter of 2016 . The Company terminated its fair value interest rate swaps in the third quarter of 2016 .
Offsetting Assets	Offsetting of Financial Assets Gross Amounts Not Offset in the Condensed Consolidated Balance Sheet Gross Amounts of Recognized Assets Gross Amounts Offset in the Condensed Consolidated Balance Sheet Net Amounts of Assets Presented in the Condensed Consolidated Balance Sheet Financial Instruments Cash Collateral Received Net Amount (in thousands) March 31, 2017 Cash flow hedges $ 57,802 $ — $ 57,802 $ — $ 9,515 $ 48,287 Other derivative activities (1) 352,706 7,250 345,456 5,005 31,262 309,189 Total derivatives subject to a master netting arrangement or similar arrangement 410,508 7,250 403,258 5,005 40,777 357,476 Total derivatives not subject to a master netting arrangement or similar arrangement (2) 4,310 — 4,310 — — 4,310 Total Derivative Assets $ 414,818 $ 7,250 $ 407,568 $ 5,005 $ 40,777 $ 361,786 December 31, 2016 Cash flow hedges $ 45,681 $ — $ 45,681 $ — $ 21,690 $ 23,991 Other derivative activities (1) 374,052 7,551 366,501 4,484 39,474 322,543 Total derivatives subject to a master netting arrangement or similar arrangement 419,733 7,551 412,182 4,484 61,164 346,534 Total derivatives not subject to a master netting arrangement or similar arrangement (2) 1,597 — 1,597 — — 1,597 Total Derivative Assets $ 421,330 $ 7,551 $ 413,779 $ 4,484 $ 61,164 $ 348,131 (1) Includes customer-related and other derivatives. (2) Includes mortgage banking derivatives.
Offsetting Liabilities	Offsetting of Financial Liabilities Gross Amounts Not Offset in the Condensed Consolidated Balance Sheet Gross Amounts of Recognized Liabilities Gross Amounts Offset in the Condensed Consolidated Balance Sheet Net Amounts of Liabilities Presented in the Condensed Consolidated Balance Sheet Cash Collateral Pledged Net Amount (in thousands) March 31, 2017 Cash flow hedges $ 66,495 $ — $ 66,495 $ 120,105 $ (53,610 ) Other derivative activities (1) 295,343 33,399 261,944 105,553 156,391 Total derivatives subject to a master netting arrangement or similar arrangement 361,838 33,399 328,439 225,658 102,781 Total derivatives not subject to a master netting arrangement or similar arrangement (2) 31,123 — 31,123 — 31,123 Total Derivative Liabilities $ 392,961 $ 33,399 $ 359,562 $ 225,658 $ 133,904 December 31, 2016 Cash flow hedges $ 59,812 $ — $ 59,812 $ 110,856 $ (51,044 ) Other derivative activities (1) 292,708 34,197 258,511 95,138 163,373 Total derivatives subject to a master netting arrangement or similar arrangement 352,520 34,197 318,323 205,994 112,329 Total derivatives not subject to a master netting arrangement or similar arrangement (2) 30,618 — 30,618 — 30,618 Total Derivative Liabilities $ 383,138 $ 34,197 $ 348,941 $ 205,994 $ 142,947 (1) Includes customer-related and other derivatives. (2) Includes mortgage banking derivatives
Designated as hedging instrument
Derivative [Line Items]
Schedule of Derivative Instruments	Derivatives designated as accounting hedges at March 31, 2017 and December 31, 2016 included: Notional Amount Asset Liability Weighted Average Receive Rate Weighted Average Pay Rate Weighted Average Life (Years) (dollars in thousands) March 31, 2017 Cash flow hedges: Pay fixed — receive floating interest rate swaps $ 7,309,091 $ 57,063 $ 4,593 1.04 % 1.17 % 2.45 Pay variable receive — fixed floating interest rate swaps 3,550,000 739 61,902 1.38 % 0.74 % 3.80 Total $ 10,859,091 $ 57,802 $ 66,495 1.15 % 1.03 % 2.89 December 31, 2016 Cash flow hedges: Pay fixed — receive floating interest rate swaps $ 10,124,172 $ 45,681 $ 59,812 0.91 % 1.03 % 3.01 Total $ 10,124,172 $ 45,681 $ 59,812 0.91 % 1.03 % 3.01
Not designated as hedging instrument
Derivative [Line Items]
Schedule of Other Derivative Activities	Other derivative activities at March 31, 2017 and December 31, 2016 included: Notional Asset derivatives Fair value Liability derivatives Fair value March 31, 2017 December 31, 2016 March 31, 2017 December 31, 2016 March 31, 2017 December 31, 2016 (in thousands) Mortgage banking derivatives: Forward commitments to sell loans $ 422,087 $ 693,137 $ 2 $ 8,577 $ 2,365 $ — Interest rate lock commitments 205,221 253,568 4,310 2,316 — — Mortgage servicing 295,000 295,000 1,288 838 1,587 1,635 Total mortgage banking risk management 922,308 1,241,705 5,600 11,731 3,952 1,635 Customer related derivatives: Swaps receive fixed 9,430,945 9,646,151 101,579 127,123 56,929 49,642 Swaps pay fixed 9,609,742 9,785,170 95,293 85,877 76,232 97,759 Other 1,551,171 1,611,342 3,834 3,421 2,380 1,989 Total customer related derivatives 20,591,858 21,042,663 200,706 216,421 135,541 149,390 Other derivative activities: Foreign exchange contracts 3,425,931 3,366,483 29,157 56,742 29,967 46,430 Interest rate swap agreements 841,952 1,064,289 3,285 2,075 2,235 2,647 Interest rate cap agreements 10,718,110 9,491,468 104,748 76,387 — — Options for interest rate cap agreements 10,690,797 9,463,935 — — 104,692 76,281 Total return settlement 658,471 658,471 — — 31,123 30,618 Other 1,303,915 1,265,583 13,520 12,293 18,956 16,325 Total $ 49,153,342 $ 47,594,597 $ 357,016 $ 375,649 $ 326,466 $ 323,326

ACCUMULATED OTHER COMPREHENSI37

ACCUMULATED OTHER COMPREHENSIVE INCOME / (LOSS) (Tables)	3 Months Ended
	Mar. 31, 2017
Equity [Abstract]
Schedule of Accumulated Other Comprehensive Income / (Loss)	The following table presents the components of accumulated other comprehensive income/(loss), net of related tax, for the three-month period ended March 31, 2017 and 2016 respectively. Total Other Total Accumulated Three-Month Period Ended March 31, 2017 December 31, 2016 March 31, 2017 Pretax Tax Net Activity Beginning Net Ending (in thousands) Change in accumulated losses on cash flow hedge derivative financial instruments $ (2,828 ) $ (1,269 ) $ (4,097 ) Reclassification adjustment for net gains/(losses) on cash flow hedge derivative financial instruments (1) 2,387 (777 ) 1,610 Net unrealized losses on cash flow hedge derivative financial instruments (441 ) (2,046 ) (2,487 ) $ (6,725 ) $ (2,487 ) $ (9,212 ) Change in unrealized gains/(losses) on investment securities available-for-sale 31,479 (10,510 ) 20,969 Reclassification adjustment for net (gains)/losses included in net income/(expense) on non-OTTI securities (2) — — — Reclassification adjustment for net losses/(gains) included in net income/(expense) on OTTI securities (3) — — — Net unrealized gains/(losses) on investment securities available-for-sale 31,479 (10,510 ) 20,969 (130,754 ) 20,969 (109,785 ) Pension and post-retirement actuarial gains/(losses) (4) 913 (428 ) 485 (55,729 ) 485 (55,244 ) As of March 31, 2017 $ 31,951 $ (12,984 ) $ 18,967 $ (193,208 ) $ 18,967 $ (174,241 ) (1) Net gains/(losses) reclassified into Interest on borrowings and other debt obligations in the Condensed Consolidated Statement of Operations for settlements of interest rate swap contracts designated as cash flow hedges. (2) Net (gains)/losses reclassified into Net gain on sale of investment securities sales in the Condensed Consolidated Statement of Operations for the sale of available-for-sale securities. (3) Unrealized gains/(losses) previously recognized in accumulated other comprehensive income on securities for which OTTI was recognized during the period. See further discussion in Note 3 to the Condensed Consolidated Financial Statements . (4) Included in the computation of net periodic pension costs. NOTE 13. ACCUMULATED OTHER COMPREHENSIVE INCOME / (LOSS) (continued) Total Other Total Accumulated Three-Month Period Ended March 31, 2016 December 31, 2015 March 31, 2016 Pretax Tax Net Activity Beginning Net Ending (in thousands) Change in accumulated (losses)/gains on cash flow hedge derivative financial instruments $ (64,196 ) $ 30,260 $ (33,936 ) Reclassification adjustment for net gains/(losses) on cash flow hedge derivative financial instruments (1) 2,663 (1,255 ) 1,408 Net unrealized (losses)/gains on cash flow hedge derivative financial instruments (61,533 ) 29,005 (32,528 ) $ (16,581 ) $ (32,528 ) $ (49,109 ) Change in unrealized gains/(losses) on investment securities available-for-sale 265,939 (104,372 ) 161,567 Reclassification adjustment for net (losses)/gains included in net income/(expense) on non-OTTI securities (2) (26,431 ) 10,387 (16,044 ) Reclassification adjustment for net losses/(gains) included in net income/(expense) on OTTI securities (3) 10 (4 ) 6 Reclassification adjustment for net (gains)/losses included in net income (26,421 ) 10,383 (16,038 ) Net unrealized gains/(losses) on investment securities available-for-sale 239,518 (93,989 ) 145,529 (95,942 ) 145,529 49,587 Pension and post-retirement actuarial gains/(losses) (4) 929 (364 ) 565 (58,007 ) 565 (57,442 ) As of March 31, 2016 $ 178,914 $ (65,348 ) $ 113,566 $ (170,530 ) $ 113,566 $ (56,964 ) (1) Net gains/(losses) reclassified into Interest on borrowings and other debt obligations in the Condensed Consolidated Statement of Operations for settlements of interest rate swap contracts designated as cash flow hedges. (2) Net (gains)/losses reclassified into Net gain on sale of investment securities sales in the Condensed Consolidated Statement of Operations for the sale of available-for-sale securities. (3) Unrealized losses/(gains) previously recognized in accumulated other comprehensive income on securities for which OTTI was recognized during the period. See further discussion in Note 3 to the Condensed Consolidated Financial Statements . (4) Included in the computation of net periodic pension costs.

COMMITMENTS, CONTINGENCIES AN38

COMMITMENTS, CONTINGENCIES AND GUARANTEES (Tables)	3 Months Ended
	Mar. 31, 2017
Commitments and Contingencies Disclosure [Abstract]
Schedule of Commitments Amount	The following table details the amount of commitments at the dates indicated: Other Commitments March 31, 2017 December 31, 2016 (in thousands) Commitments to extend credit $ 28,240,161 $ 28,889,904 Unsecured revolving lines of credit 30,116 30,547 Letters of credit 1,849,205 2,071,089 Recourse exposure on sold loans 68,564 69,877 Commitments to sell loans 55,627 49,121 Total commitments $ 30,243,673 $ 31,110,538
Schedule of Commitments to Extend Credit, Expiration Periods	The following table details the amount of commitments to extend credit expiring per period as of the dates indicated: March 31, 2017 December 31, 2016 (in thousands) 1 year or less $ 5,867,806 $ 5,656,552 Over 1 year to 3 years 5,191,572 5,265,685 Over 3 years to 5 years 4,053,421 4,680,057 Over 5 years (1) 13,127,362 13,287,610 Total $ 28,240,161 $ 28,889,904 (1) Includes certain commitments to extend credit that do not have a contractual maturity date, but are expected to be outstanding greater than 5 years .
Schedule of Letters of Credit, Expiration Periods	The following table details the amount of letters of credit expiring per period as of the dates indicated: March 31, 2017 December 31, 2016 (in thousands) 1 year or less $ 1,158,238 $ 1,360,495 Over 1 year to 3 years 595,918 399,866 Over 3 years to 5 years 67,439 283,975 Over 5 years 27,610 26,753 Total $ 1,849,205 $ 2,071,089

FAIR VALUE (Tables)

FAIR VALUE (Tables)	3 Months Ended
	Mar. 31, 2017
Fair Value Disclosures [Abstract]
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis	The following tables present the assets and liabilities that are measured at fair value on a recurring basis by major product category and fair value hierarchy as of March 31, 2017 and December 31, 2016 . Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Significant Balance at (in thousands) Financial assets: U.S. Treasury securities $ 169,603 $ 2,133,642 $ — $ 2,303,245 Corporate debt — 210,906 — 210,906 ABS — 180,021 573,454 753,475 Equity securities (1) 563 — — 563 State and municipal securities — 28 — 28 MBS — 15,087,457 — 15,087,457 Total investment securities available-for-sale (1) 170,166 17,612,054 573,454 18,355,674 Trading securities 1,976 17,410 — 19,386 RICs held-for-investment — — 202,473 202,473 LHFS (2) — 242,079 — 242,079 MSRs (3) — — 149,455 149,455 Derivatives: Cash flow — 57,802 — 57,802 Mortgage banking interest rate lock commitments — — 4,310 4,310 Mortgage banking forward sell commitments — — 2 2 Customer related — 200,706 — 200,706 Foreign exchange — 29,157 — 29,157 Mortgage servicing — 1,288 — 1,288 Interest rate swap agreements — 3,285 — 3,285 Interest rate cap agreements — 104,748 — 104,748 Other — 13,520 — 13,520 Total financial assets $ 172,142 $ 18,282,049 $ 929,694 $ 19,383,885 Financial liabilities: Derivatives: Cash flow $ — $ 66,495 $ — $ 66,495 Mortgage banking forward sell commitments — 2,365 — 2,365 Customer related — 135,541 — 135,541 Foreign exchange — 29,967 — 29,967 Mortgage servicing — 1,587 — 1,587 Interest rate swaps — 2,235 — 2,235 Option for interest rate cap — 104,692 — 104,692 Total return settlement — — 31,123 31,123 Other — 18,058 898 18,956 Total financial liabilities $ — $ 360,940 $ 32,021 $ 392,961 (1) Investment securities available-for-sale disclosed on the Condensed Consolidated Balance Sheet at March 31, 2017 includes $10.7 million of equity securities valued using net asset value as a practical expedient that are not presented within this table. (2) LHFS disclosed on the Condensed Consolidated Balance Sheet also includes LHFS that are held at the lower of cost or fair value and are not presented within this table. (3) The Company has total MSRs of $153.1 million as of March 31, 2017 . The Company has elected to account for the majority of its MSR balance using the FVO, while the remainder of the MSRs are accounted for using the lower of cost or fair value and are not presented within this table. NOTE 16. FAIR VALUE (continued) Quoted Prices in Active Significant Other Significant Balance at (in thousands) Financial assets: U.S. Treasury securities $ 224,506 $ 1,632,351 $ — $ 1,856,857 ABS — 396,157 814,567 1,210,724 Equity securities (1) 544 — — 544 State and municipal securities — 30 — 30 MBS — 13,945,463 — 13,945,463 Total investment securities available-for-sale (1) 225,050 15,974,001 814,567 17,013,618 Trading securities 214 1,416 — 1,630 RICs held-for-investment — — 217,170 217,170 LHFS (2) — 453,293 — 453,293 MSRs (3) — — 146,589 146,589 Derivatives: Cash flow — 45,681 — 45,681 Mortgage banking interest rate lock commitments — — 2,316 2,316 Mortgage banking forward sell commitments — 8,575 2 8,577 Customer related — 216,421 — 216,421 Foreign exchange — 56,742 — 56,742 Mortgage servicing — 838 — 838 Interest rate swap agreements — 2,075 — 2,075 Interest rate cap agreements — 76,387 — 76,387 Other — 12,293 — 12,293 Total financial assets $ 225,264 $ 16,847,722 $ 1,180,644 $ 18,253,630 Financial liabilities: Derivatives: Cash flow $ — $ 59,812 $ — $ 59,812 Customer related — 149,390 — 149,390 Foreign exchange — 46,430 — 46,430 Mortgage servicing — 1,635 — 1,635 Interest rate swaps — 2,647 — 2,647 Option for interest rate cap — 76,281 — 76,281 Total return settlement — — 30,618 30,618 Other — 15,625 700 16,325 Total financial liabilities $ — $ 351,820 $ 31,318 $ 383,138 (1) Investment securities available-for-sale disclosed on the Condensed Consolidated Balance Sheet at December 31, 2016 includes $10.6 million of equity securities valued using net asset value as a practical expedient that are not presented within this table. (2) LHFS disclosed on the Condensed Consolidated Balance Sheet also includes LHFS that are held at the lower of cost or fair value and are not presented within this table. (3) The Company had total MSRs of $150.3 million as of December 31, 2016 . The Company has elected to account for the majority of its MSR balance using the FVO, while the remainder of the MSRs are accounted for using the lower of cost or fair value and are not presented within this table.
Fair Value Measurements, Nonrecurring	Assets measured at fair value on a nonrecurring basis that were still held on the balance sheet were as follows: Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Fair Value (in thousands) March 31, 2017 Impaired LHFI $ 11,436 $ 140,279 $ 286,183 $ 437,898 Foreclosed assets — 9,055 81,398 90,453 Vehicle inventory — 315,035 — 315,035 LHFS — — 1,861,021 1,861,021 Auto loans impaired due to bankruptcy — 54,929 — 54,929 MSRs — — 8,918 8,918 December 31, 2016 Impaired LHFI $ 13,147 $ 244,986 $ 265,664 $ 523,797 Foreclosed assets — 30,792 79,721 110,513 Vehicle inventory — 257,659 — 257,659 LHFS — — 2,133,040 2,133,040 MSRs — — 10,287 10,287
Increases and Decreases in Value of Certain Assets Measured at Fair Value on Nonrecurring Basis	The following table presents the increases and decreases in value of certain assets that are measured at fair value on a nonrecurring basis for which a fair value adjustment has been included in the Condensed Consolidated Statements of Operations relating to assets held at period-end: Statement of Operations Three-Month Period Ended March 31, 2017 2016 (in thousands) Impaired loans held-for-investment Provision for credit losses $ (45,772 ) $ (91,860 ) Foreclosed assets Miscellaneous income (1) (1,742 ) (2,994 ) Loans held for sale Miscellaneous income (1) (66,121 ) (64,213 ) Auto loans impaired due to bankruptcy Provision for credit losses (23,600 ) — Mortgage servicing rights Mortgage banking income, net 95 181 $ (137,140 ) $ (158,886 ) (1) These amounts reduce Miscellaneous income.
Rollforward for Recurring Assets and Liabilities	The tables below present the changes in Level 3 balances for the three-month periods ended March 31, 2017 and 2016 , respectively, for those assets and liabilities measured at fair value on a recurring basis. Three-Month Period Ended March 31, 2017 Investments RICs Held for Investment MSRs Derivatives Total (in thousands) Balance, December 31, 2016 $ 814,567 $ 217,170 $ 146,589 $ (29,000 ) $ 1,149,326 Losses in other comprehensive income (619 ) — — — (619 ) Gains in earnings — 16,891 1,457 1,194 19,542 Additions/Issuances — 13,331 5,730 — 19,061 Settlements (1) (240,494 ) (44,919 ) (4,321 ) 97 (289,637 ) Balance, March 31, 2017 $ 573,454 $ 202,473 $ 149,455 $ (27,709 ) $ 897,673 Changes in unrealized gains (losses) included in earnings related to balances still held at March 31, 2017 $ — $ 16,891 $ 1,457 $ (800 ) $ 17,548 (1) Settlements include charge-offs, prepayments, pay downs and maturities. NOTE 16. FAIR VALUE (continued) Three-Month Period Ended March 31, 2016 Investments RICs Held for Investment MSRs Derivatives Total (in thousands) Balance, December 31, 2015 $ 1,360,240 $ 335,425 $ 147,233 $ (51,278 ) $ 1,791,620 Gains in other comprehensive income 1,585 — — — 1,585 Gains/(losses) in earnings — 28,042 (14,356 ) 3,027 16,713 Additions/Issuances 278,686 — 3,591 — 282,277 Settlements (1) (88 ) (73,517 ) (5,726 ) 1,053 (78,278 ) Balance, March 31, 2016 $ 1,640,423 $ 289,950 $ 130,742 $ (47,198 ) $ 2,013,917 Changes in unrealized gains (losses) included in earnings related to balances still held at March 31, 2016 $ — $ 28,042 $ (14,356 ) $ (1,425 ) $ 12,261 (1) Settlements include charge-offs, prepayments, pay downs and maturities.
Quantitative Information on Level 3 Recurring Assets and Liabilities	The following table presents quantitative information about the significant unobservable inputs within significant Level 3 recurring assets and liabilities. Fair Value at March 31, 2017 Valuation Technique Unobservable Inputs Range (in thousands) Financial Assets: ABS Financing bonds $ 524,096 Discounted Cash Flow Discount Rate (1) 1.44% - 2.60% (1.92%) Sale-leaseback securities $ 49,358 Consensus Pricing (2) Offered quotes (3) 125.69 % RICs held-for-investment $ 202,473 Discounted Cash Flow Prepayment rate (CPR) (4) 6.66 % Discount Rate (5) 9.50% - 14.50% (9.91%) Recovery Rate (6) 25.00% - 43.00% (28.83%) MSRs $ 149,455 Discounted Cash Flow Prepayment rate (CPR) (7) 0.03% - 53.47% (9.48%) Discount Rate (8) 9.90 % Mortgage banking interest rate lock commitments $ 4,310 Discounted Cash Flow Pull through percentage (9) 79.92 % MSR value (10) 0.73% - 1.03% (0.96%) Financial Liabilities: Total return settlement $ 31,123 Discounted Cash Flow Discount Rate (4) 6.40 % (1) Based on the applicable term and discount index. (2) Consensus pricing refers to fair value estimates that are generally developed using information such as dealer quotes or other third-party valuations or comparable asset prices. (3) Based on the nature of the input, a range or weighted average does not exist. For sale-leaseback securities, the Company owns one security. (4) Based on the analysis of available data from a comparable market securitization of similar assets. (5) Based on the cost of funding of debt issuance and recent historical equity yields. (6) Based on the average severity utilizing reported severity rates and loss severity utilizing available market data from a comparable securitized pool. (7) Average CPR projected from collateral stratified by loan type, note rate and maturity. (8) Based on the nature of the input, a range or weighted average does not exist. (9) Historical weighted average based on principal balance calculated as the percentage of loans originated for sale divided by total commitments less outstanding commitments. (10) MSR value is the estimated value of the servicing right embedded in the underlying loan, expressed in basis points of outstanding unpaid principal balance.
Schedule of Fair Value of Financial Instruments	The carrying amounts and estimated fair values, as well as the level within the fair value hierarchy, of the Company's financial instruments are as follows: March 31, 2017 Carrying Value Fair Value Level 1 Level 2 Level 3 (in thousands) Financial assets: Cash and amounts due from depository institutions $ 8,570,489 $ 8,570,489 $ 8,570,489 $ — $ — Available-for-sale investment securities (1) 18,355,674 18,355,674 170,166 17,612,054 573,454 Held to maturity investment securities 1,621,221 1,594,256 — 1,594,256 — Trading securities 19,386 19,386 1,976 17,410 — LHFI, net 79,792,037 80,584,109 11,436 140,279 80,432,394 LHFS 2,102,959 2,103,100 — 242,079 1,861,021 Restricted cash 3,283,356 3,283,356 3,283,356 — — MSRs (2) 153,114 158,373 — — 158,373 Derivatives 414,818 414,818 — 410,506 4,312 Financial liabilities: Deposits 66,601,234 66,501,812 58,971,706 7,530,106 — Borrowings and other debt obligations 41,475,698 41,811,036 770 26,023,543 15,786,723 Derivatives 392,961 392,961 — 360,940 32,021 December 31, 2016 Carrying Value Fair Value Level 1 Level 2 Level 3 (in thousands) Financial assets: Cash and amounts due from depository institutions $ 10,035,859 $ 10,035,859 $ 10,035,859 $ — $ — Available-for-sale investment securities (1) 17,013,618 17,013,618 225,050 15,974,001 814,567 Held to maturity investment securities 1,658,644 1,635,413 — 1,635,413 — Trading securities 1,630 1,630 214 1,416 — LHFI, net 82,005,321 81,955,122 13,147 244,986 81,696,989 LHFS 2,586,308 2,586,333 — 453,293 2,133,040 Restricted cash 3,016,948 3,016,948 3,016,948 — — MSRs (2) 150,343 156,876 — — 156,876 Derivatives 421,330 421,330 — 419,012 2,318 Financial liabilities: Deposits 67,240,690 67,141,041 58,067,792 9,073,249 — Borrowings and other debt obligations 43,524,445 43,770,267 830 26,132,197 17,637,240 Derivatives 383,138 383,138 — 351,820 31,318 (1) Investment securities available-for-sale disclosed on the Condensed Consolidated Balance Sheet at March 31, 2017 and December 31, 2016 includes $10.7 million and $10.6 million , respectively, of equity securities valued using net asset value as a practical expedient that are not presented within these tables. (2) The Company has elected to account for the majority of its MSR balance using the FVO, while the remainder of the MSRs are accounted for using the lower of cost or fair value.
Summary of Difference Between Fair Value and Principal Balance of LHFS	The following table summarizes the differences between the fair value and the principal balance of LHFS and RICs measured at fair value on a recurring basis as of March 31, 2017 . Fair Value Aggregate Unpaid Principal Balance Difference (in thousands) March 31, 2017 LHFS (1) $ 242,079 $ 238,014 $ 4,065 RICs held-for-investment $ 202,473 $ 255,463 $ (52,990 ) Nonaccrual loans 20,075 28,426 (8,351 ) (1) LHFS disclosed on the Condensed Consolidated Balance Sheet also includes LHFS that are held at the lower of cost or fair value that are not presented within this table. There were no nonaccrual loans related to the LHFS measured using the FVO.

BUSINESS SEGMENT INFORMATION (T

BUSINESS SEGMENT INFORMATION (Tables)	3 Months Ended
	Mar. 31, 2017
Segment Reporting [Abstract]
Schedule of Segment Reporting Information	The following tables present certain information regarding the Company’s segments. For the Three-Month Period Ended SHUSA Reportable Segments March 31, 2017 Consumer & Business Banking Commercial Banking Commercial Real Estate GCB Other (2) SC (3) SC Purchase Price Adjustments (4) Eliminations (4) Total (in thousands) Net interest income $ 303,448 $ 85,320 $ 69,496 $ 42,906 $ 12,824 $ 1,042,925 $ 37,305 $ 8,341 $ 1,602,565 Total non-interest income 84,998 13,366 2,245 11,670 187,621 434,848 5,454 (11,784 ) 728,418 Provision for credit losses 22,451 6,003 (617 ) (1,364 ) 15,610 635,013 58,349 — 735,445 Total expenses 385,309 54,247 21,995 23,468 240,983 621,334 11,872 (6,316 ) 1,352,892 Income/(loss) before income taxes (19,314 ) 38,436 50,363 32,472 (56,148 ) 221,426 (27,462 ) 2,873 242,646 Intersegment revenue/(expense) (1) 3,349 1,172 817 (2,175 ) (3,163 ) — — — — Total assets 19,279,101 11,457,211 14,397,413 8,077,848 42,835,963 39,061,940 — — 135,109,476 (1) Intersegment revenue/(expense) represents charges or credits for funds used or provided by each of the segments and is included in net interest income. (2) Other includes the results of the entities transferred to the IHC, earnings from non-strategic assets, the investment portfolio, interest expense on the Bank’s and the Parent Company's borrowings and other debt obligations, amortization of intangible assets and certain unallocated corporate income and indirect expenses. (3) Management of SHUSA manages SC by analyzing the pre-Change in Control results of SC as disclosed in this column. (4) Purchase Price Adjustments represents the impact that SC purchase marks had on the results of SC included within the consolidated operations of SHUSA, while eliminations eliminate intercompany transactions. NOTE 17. BUSINESS SEGMENT INFORMATION (continued) For the Three-Month Period Ended SHUSA Reportable Segments March 31, 2016 Consumer & Business Banking Commercial Banking Commercial Real Estate GCB Other (2) SC (3) SC Purchase Price Adjustments (4) Eliminations (4) Total (in thousands) Net interest income $ 222,561 $ 77,144 $ 64,757 $ 60,317 $ 54,212 $ 1,163,578 $ 51,773 $ 1,461 $ 1,695,803 Total non-interest income 97,986 16,554 4,940 20,982 200,979 353,191 13,782 (11,237 ) 697,177 Provision for credit losses 501 61,656 12,680 47,795 13,497 660,170 102,163 — 898,462 Total expenses 380,488 52,124 22,323 38,200 283,387 527,657 14,733 (12,937 ) 1,305,975 Income/(loss) before income taxes (60,442 ) (20,082 ) 34,694 (4,696 ) (41,693 ) 328,942 (51,341 ) 3,161 188,543 Intersegment revenue/(expense) (1) 12,702 4,604 3,378 (16 ) (20,668 ) — — — — Total assets 19,791,765 11,729,869 15,552,072 12,555,445 47,822,778 37,768,959 — — 145,220,888 (1) Intersegment revenue/(expense) represents charges or credits for funds used or provided by each of the segments and is included in net interest income. (2) Other includes the results of the entities transferred to the IHC, earnings from non-strategic assets, the investment portfolio, interest expense on the Bank’s and the Parent Company's borrowings and other debt obligations, amortization of intangible assets and certain unallocated corporate income and indirect expenses. (3) Management of SHUSA manages SC by analyzing the pre-Change in Control results of SC as disclosed in this column. (4) Purchase Price Adjustments represents the impact that SC purchase marks had on the results of SC included within the consolidated operations of SHUSA, while eliminations eliminate intercompany transactions.

INTERMEDIATE HOLDING COMPANY (T

INTERMEDIATE HOLDING COMPANY (Tables)	3 Months Ended
	Mar. 31, 2017
Accounting Changes and Error Corrections [Abstract]
Impact of the Transfer in the Financial Statements	The following table summarizes the impact of the transfer to certain items within the Company's Condensed Consolidated Statement of Operations for the three months ended March 31, 2016: Income Statement As Previously Reported Retrospective Adjustments As Retrospectively Adjusted (in thousands) Three-months Ended March 31, 2016 Total interest income $ 1,969,504 $ 88,266 $ 2,057,770 Total interest expense 353,452 8,515 361,967 Provision for credit losses 882,278 16,184 898,462 Total fees and other income 571,280 98,647 669,927 Total general and administrative expenses 1,109,274 116,108 1,225,382 Income tax provision/(benefit) 65,396 13,464 78,860 Net Income 13,777 24,631 38,408

BASIS OF PRESENTATION AND ACC42

BASIS OF PRESENTATION AND ACCOUNTING POLICIES (General) (Details) - SC	3 Months Ended
	Mar. 31, 2017
Basis of Presentation and Accounting Policies [Line Items]
Financing contract term	10 years
Ownership percentage by parent	58.70%
Percentage owned by noncontrolling shareholders	41.30%

BASIS OF PRESENTATION AND ACC43

BASIS OF PRESENTATION AND ACCOUNTING POLICIES (Recently Adopted Accounting Policies) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Dec. 31, 2016
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative-effect adjustment upon adoption		$ 25,709
Excess tax benefits, net of tax	$ 47
Retained Earnings
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative-effect adjustment upon adoption		14,764
Noncontrolling Interest
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative-effect adjustment upon adoption		37,401
Common Stock and Paid-in Capital
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative-effect adjustment upon adoption		(26,456)
Accounting Standards Update 2016-09, Excess Tax Benefit Component
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative-effect adjustment upon adoption		27,100
Accounting Standards Update 2016-09, Excess Tax Benefit Component | Retained Earnings
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative-effect adjustment upon adoption		14,800
Accounting Standards Update 2016-09, Excess Tax Benefit Component | Noncontrolling Interest
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative-effect adjustment upon adoption		37,400
Accounting Standards Update 2016-09, Excess Tax Benefit Component | Common Stock and Paid-in Capital
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative-effect adjustment upon adoption		(26,500)
Accounting Standards Update 2016-09, Forfeiture Rate Component [Member] | Retained Earnings
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative-effect adjustment upon adoption		$ (1,400)

INVESTMENT SECURITIES (Availabl

INVESTMENT SECURITIES (Available-for-sale Securities) (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 18,543,515	$ 17,227,566
Gross Unrealized Gains	40,338	30,199
Gross Unrealized Loss	(217,525)	(233,540)
Fair Value	18,366,328	17,024,225
U.S. Treasury securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	2,303,126	1,857,357
Gross Unrealized Gains	2,554	1,826
Gross Unrealized Loss	(2,435)	(2,326)
Fair Value	2,303,245	1,856,857
Corporate debt securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	210,906
Gross Unrealized Gains	0
Gross Unrealized Loss	0
Fair Value	210,906
Asset-backed securities (“ABS”)
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	740,136	1,196,702
Gross Unrealized Gains	15,791	16,410
Gross Unrealized Loss	(2,452)	(2,388)
Fair Value	753,475	1,210,724
Equity securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	11,800	11,716
Gross Unrealized Gains	0	0
Gross Unrealized Loss	(583)	(565)
Fair Value	11,217	11,151
State and municipal securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	28	30
Gross Unrealized Gains	0	0
Gross Unrealized Loss	0	0
Fair Value	28	30
U.S. government agencies - Residential
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	5,280,127	5,424,412
Gross Unrealized Gains	4,491	3,253
Gross Unrealized Loss	(57,579)	(64,537)
Fair Value	5,227,039	5,363,128
U.S. government agencies - Commercial
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	916,197	948,696
Gross Unrealized Gains	2,410	1,998
Gross Unrealized Loss	(9,198)	(8,196)
Fair Value	909,409	942,498
Federal Home Loan Mortgage Corporation (“FHLMC”) and FNMA - Residential debt securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	9,057,713	7,765,003
Gross Unrealized Gains	15,092	6,712
Gross Unrealized Loss	(144,618)	(154,858)
Fair Value	8,928,187	7,616,857
FHLMC and FNMA - Commercial debt securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	23,475	23,636
Gross Unrealized Gains	0	0
Gross Unrealized Loss	(660)	(670)
Fair Value	22,815	22,966
Non-agency securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	7	14
Gross Unrealized Gains	0	0
Gross Unrealized Loss	0	0
Fair Value	$ 7	$ 14

INVESTMENT SECURITIES (Held-to-

INVESTMENT SECURITIES (Held-to-maturity Securities) (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	$ 1,621,221	$ 1,658,644
Gross Unrealized Gains	1,477	2,195
Gross Unrealized Loss	(28,442)	(25,426)
Fair Value	1,594,256	1,635,413
U.S. government agencies - Residential
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	1,621,221	1,658,644
Gross Unrealized Gains	1,477	2,195
Gross Unrealized Loss	(28,442)	(25,426)
Fair Value	$ 1,594,256	$ 1,635,413

INVESTMENT SECURITIES (Securiti

INVESTMENT SECURITIES (Securities Pledged as Collateral) (Details) - USD ($) $ in Millions	Mar. 31, 2017	Dec. 31, 2016
Financial Instruments Owned and Pledged as Collateral [Line Items]
Securities pledged as collateral, fair value	$ 7,100	$ 7,200
Collateral with Federal Reserve Bank
Financial Instruments Owned and Pledged as Collateral [Line Items]
Securities pledged as collateral, fair value	3,200	3,200
Public fund deposits
Financial Instruments Owned and Pledged as Collateral [Line Items]
Securities pledged as collateral, fair value	2,900	3,000
Repurchase agreements, hedging activities and recourse on loan sales
Financial Instruments Owned and Pledged as Collateral [Line Items]
Securities pledged as collateral, fair value	106	109.7
Deposits with Clearing Organizations
Financial Instruments Owned and Pledged as Collateral [Line Items]
Securities pledged as collateral, fair value	622.3	622
Overnight customer deposits
Financial Instruments Owned and Pledged as Collateral [Line Items]
Securities pledged as collateral, fair value	$ 372.9	$ 271.2

INVESTMENT SECURITIES (Contract

INVESTMENT SECURITIES (Contractual Maturity of Available-for-sale Securities) (Details) $ in Thousands	Mar. 31, 2017USD ($)
Total amortized cost
Due within one year	$ 1,172,284
Due after 1 year but within 5 years	1,924,934
Due after 5 years but within 10 years	222,527
Due after 10 years	15,211,970
Total	18,531,715
Total fair value
Due within one year	1,172,700
Due after 1 year but within 5 years	1,940,276
Due after 5 years but within 10 years	221,086
Due after 10 years	15,021,049
Total	$ 18,355,111

INVESTMENT SECURITIES (Contra48

INVESTMENT SECURITIES (Contractual Maturity of Held-to-maturity Securities) (Details) $ in Thousands	Mar. 31, 2017USD ($)
Amortized Cost
Due after 10 years	$ 1,621,221
Total	1,621,221
Fair Value
Due after 10 years	1,594,256
Total	$ 1,594,256

INVESTMENT SECURITIES (Gross Un

INVESTMENT SECURITIES (Gross Unrealized Loss and Fair Value of Available-for-sale Securities) (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Fair Value
Less than 12 months	$ 9,980,134	$ 10,220,992
12 months or longer	3,116,269	3,230,433
Total	13,096,403	13,451,425
Unrealized Losses
Less than 12 months	(102,756)	(113,833)
12 months or longer	(114,769)	(119,707)
Total	(217,525)	(233,540)
U.S. Treasury securities
Fair Value
Less than 12 months	1,280,641	1,016,654
12 months or longer	0	0
Total	1,280,641	1,016,654
Unrealized Losses
Less than 12 months	(2,435)	(2,326)
12 months or longer	0	0
Total	(2,435)	(2,326)
Corporate debt securities
Fair Value
Less than 12 months		0
12 months or longer		0
Total		0
Unrealized Losses
Less than 12 months		0
12 months or longer		0
Total		0
ABS
Fair Value
Less than 12 months	60,499	76,552
12 months or longer	119,558	111,758
Total	180,057	188,310
Unrealized Losses
Less than 12 months	(868)	(1,021)
12 months or longer	(1,584)	(1,367)
Total	(2,452)	(2,388)
Equity securities
Fair Value
Less than 12 months	820	770
12 months or longer	9,785	9,800
Total	10,605	10,570
Unrealized Losses
Less than 12 months	(18)	(16)
12 months or longer	(565)	(549)
Total	(583)	(565)
State and municipal securities
Fair Value
Less than 12 months		0
12 months or longer		0
Total		0
Unrealized Losses
Less than 12 months		0
12 months or longer		0
Total		0
U.S. government agencies - Residential
Fair Value
Less than 12 months	3,349,662	3,831,354
12 months or longer	993,213	1,027,609
Total	4,342,875	4,858,963
Unrealized Losses
Less than 12 months	(43,591)	(46,846)
12 months or longer	(13,988)	(17,691)
Total	(57,579)	(64,537)
U.S. government agencies - Commercial
Fair Value
Less than 12 months	550,972	532,334
12 months or longer	95,294	98,918
Total	646,266	631,252
Unrealized Losses
Less than 12 months	(5,148)	(4,451)
12 months or longer	(4,050)	(3,745)
Total	(9,198)	(8,196)
FHLMC and FNMA - Residential debt securities
Fair Value
Less than 12 months	4,715,186	4,740,824
12 months or longer	1,897,958	1,981,886
Total	6,613,144	6,722,710
Unrealized Losses
Less than 12 months	(50,045)	(58,514)
12 months or longer	(94,573)	(96,344)
Total	(144,618)	(154,858)
FHLMC and FNMA - Commercial debt securities
Fair Value
Less than 12 months	22,354	22,504
12 months or longer	461	462
Total	22,815	22,966
Unrealized Losses
Less than 12 months	(651)	(659)
12 months or longer	(9)	(11)
Total	$ (660)	$ (670)

INVESTMENT SECURITIES (Gross 50

INVESTMENT SECURITIES (Gross Unrealized Loss and Fair Value of Held-to-maturity Securities) (Details) (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Fair Value
Less than 12 months	$ 1,310,387	$ 1,311,390
12 months or longer	0	0
Total	1,310,387	1,311,390
Unrealized Losses
Less than 12 months	(28,442)	(25,426)
12 months or longer	0	0
Total	(28,442)	(25,426)
U.S. government agencies - Residential
Fair Value
Less than 12 months	1,310,387	1,311,390
12 months or longer	0	0
Total	1,310,387	1,311,390
Unrealized Losses
Less than 12 months	(28,442)	(25,426)
12 months or longer	0	0
Total	$ (28,442)	$ (25,426)

INVESTMENT SECURITIES (Other-Th

INVESTMENT SECURITIES (Other-Than-Temporary Impairment) (Details)	Mar. 31, 2017security
Investments, Debt and Equity Securities [Abstract]
Number of securities in unrealized loss position	552

INVESTMENT SECURITIES (Gains (L

INVESTMENT SECURITIES (Gains (Losses) and Proceeds on Sale of Securities) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Schedule of Available-for-sale Securities [Line Items]
Proceeds from the sales of available-for-sale securities	$ 0	$ 3,435,844
Gross realized gains	0	26,707
Gross realized losses	0	(276)
OTTI	0	(10)
Net realized gains	$ 0	26,421
Realized investment gain (loss)		26,400
State and municipal securities
Schedule of Available-for-sale Securities [Line Items]
Realized investment gain (loss)		19,500
Investment securities sold during the period		726,800
U.S. Treasury securities
Schedule of Available-for-sale Securities [Line Items]
Realized investment gain (loss)		6,700
Investment securities sold during the period		$ 2,800,000

INVESTMENT SECURITIES (Trading

INVESTMENT SECURITIES (Trading Securities) (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Investments, Debt and Equity Securities [Abstract]
Trading securities	$ 19,386	$ 1,630

INVESTMENT SECURITIES (Other In

INVESTMENT SECURITIES (Other Investments) (Details) - USD ($)	3 Months Ended
	Mar. 31, 2017	Dec. 31, 2016
Investments, Debt and Equity Securities [Abstract]
Accrued investment income receivable	$ 49,900,000	$ 44,800,000
Stock of FHLB of Pittsburgh and the Federal Reserve Bank	$ 630,100,000	680,500,000
FHLB Stock, par value (in usd per share)	$ 100
Purchases of FHLB stock	$ 13,200,000
FHLB stock redeemed	64,500,000
Gain (loss) on redemption of FHLB stock	0
Low income housing tax credit investment	$ 53,300,000	$ 50,400,000

LOANS AND ALLOWANCE FOR CREDI55

LOANS AND ALLOWANCE FOR CREDIT LOSSES (Narrative) (Details) $ in Thousands		3 Months Ended		12 Months Ended
		Mar. 31, 2017USD ($)business_line	Mar. 31, 2016USD ($)	Dec. 31, 2016USD ($)
Loans Receivable [Line Items]
Loans pledged as collateral		$ 52,400,000		$ 53,500,000
Loans held-for-sale	[1]	2,102,959		2,586,308
Accrued interest receivable	[2]	516,539		599,321
Financing receivable		$ 85,817,859		88,406,093
Percentage of payment needed on past due loans for qualification		90.00%
Troubled debt restructurings		$ 6,379,193		6,106,915
TDR, threshold period of sustained repayment performance		6 months
TDR, threshold period loan needed to remain current prior to modification to remain on accrual status		6 months
TDRs, number of days past due after modification considered to have subsequently defaulted		90 days
Performing
Loans Receivable [Line Items]
Interest income		$ 240,900		657,500
Troubled debt restructurings		4,734,246		5,169,788
SC | Chrysler Capital Loans
Loans Receivable [Line Items]
Loan originations		$ 1,600,000	$ 2,500,000
SC | Chrysler Capital Loans | Accounts Receivable | Credit Concentration Risk
Loans Receivable [Line Items]
Percentage of loan origination		42.00%	49.00%
Loans receivable
Loans Receivable [Line Items]
Accrued interest receivable		$ 466,600		$ 554,500
Retail installment contracts and auto loans
Loans Receivable [Line Items]
Percentage of payment needed on past due loans for qualification		90.00%		50.00%
Retail installment contracts and auto loans | SC | Chrysler Capital Leases
Loans Receivable [Line Items]
Financing receivable		$ 7,100,000		$ 7,400,000
Retail installment contracts and auto loans | SC | Chrysler Capital Leases | Accounts Receivable | Credit Concentration Risk
Loans Receivable [Line Items]
Percentage of loan origination		31.00%		32.00%
Retail installment contracts
Loans Receivable [Line Items]
TDRs, number of days past due after modification considered to have subsequently defaulted		120 days
Consumer | Personal unsecured loans
Loans Receivable [Line Items]
LHFS		$ 979,100		$ 1,100,000
Financing receivable		$ 2,191,027		$ 2,311,696
Commercial | Commercial real estate loans
Loans Receivable [Line Items]
Number of business lines | business_line		3
[1]	Recorded at the fair value option ("FVO") or lower of cost or fair value.
[2]	The Company has interests in certain securitization trusts ("Trusts") that are considered variable interest entities ("VIEs") for accounting purposes. The Company consolidates VIEs where it is deemed the primary beneficiary. See Note 6 to these Condensed Consolidated Financial Statements for additional information.

LOANS AND ALLOWANCE FOR CREDI56

LOANS AND ALLOWANCE FOR CREDIT LOSSES (Loan and Lease Portfolio Composition) (Details) - USD ($) $ in Thousands		Mar. 31, 2017	Dec. 31, 2016	Mar. 31, 2016
Loans Receivable [Line Items]
Total loans held for investment	[1],[2]	$ 83,714,900	$ 85,819,785
Loans held for investment with fixed rate of interest		50,822,537	51,752,761
Loans held for investment with variable rate of interest		$ 32,892,363	$ 34,067,024
Loans held for investment, percent of total loans		100.00%	100.00%
Loans held for investment with fixed rate of interest, percent of total loans		60.70%	60.30%
Loans held for investment with variable rate of interest, percent of total loans		39.30%	39.70%
Net increase in loan balances		$ 968,300	$ 845,800
Ending balance, collectively evaluated for impairment		76,990,063		$ 82,860,776
Commercial
Loans Receivable [Line Items]
Total loans held for investment		$ 42,311,972	$ 44,440,128
Loans held for investment, percent of total loans		50.50%	51.80%
Ending balance, collectively evaluated for impairment		$ 41,636,856		46,686,579
Commercial | Commercial real estate loans
Loans Receivable [Line Items]
Total loans held for investment		$ 9,883,926	$ 10,112,043
Loans held for investment, percent of total loans		11.80%	11.80%
Commercial | Commercial and industrial loans
Loans Receivable [Line Items]
Total loans held for investment		$ 17,218,865	$ 18,812,002
Loans held for investment, percent of total loans		20.60%	21.90%
Commercial | Multifamily loans
Loans Receivable [Line Items]
Total loans held for investment		$ 8,462,464	$ 8,683,680
Loans held for investment, percent of total loans		10.10%	10.10%
Commercial | Other commercial
Loans Receivable [Line Items]
Total loans held for investment		$ 6,746,717	$ 6,832,403
Loans held for investment, percent of total loans		8.00%	8.00%
Consumer
Loans Receivable [Line Items]
Total loans held for investment		$ 41,402,928	$ 41,379,657
Loans held for investment, percent of total loans		49.50%	48.20%
Ending balance, collectively evaluated for impairment		$ 35,353,207		36,174,197
Consumer | RICs and auto loans - originated
Loans Receivable [Line Items]
Total loans held for investment		22,729,892	$ 22,104,918
Consumer loans secured by real estate
Loans Receivable [Line Items]
Total loans held for investment		$ 13,742,515	$ 13,776,464
Loans held for investment, percent of total loans		16.40%	16.10%
Consumer loans secured by real estate | Residential mortgages
Loans Receivable [Line Items]
Total loans held for investment		$ 7,801,175	$ 7,775,272
Loans held for investment, percent of total loans		9.30%	9.10%
Consumer loans secured by real estate | Home equity loans and lines of credit
Loans Receivable [Line Items]
Total loans held for investment		$ 5,941,340	$ 6,001,192
Loans held for investment, percent of total loans		7.10%	7.00%
Consumer loans not secured by real estate | RICs and auto loans - originated
Loans Receivable [Line Items]
Total loans held for investment		$ 22,729,892	$ 22,104,918
Loans held for investment, percent of total loans		27.20%	25.80%
Consumer loans not secured by real estate | RICs and auto loans - purchased
Loans Receivable [Line Items]
Total loans held for investment		$ 2,976,567	$ 3,468,803
Loans held for investment, percent of total loans		3.60%	4.00%
Consumer loans not secured by real estate | Personal unsecured loans
Loans Receivable [Line Items]
Total loans held for investment		$ 1,211,922	$ 1,234,094
Loans held for investment, percent of total loans		1.40%	1.40%
Consumer loans not secured by real estate | Other consumer
Loans Receivable [Line Items]
Total loans held for investment		$ 742,032	$ 795,378
Loans held for investment, percent of total loans		0.90%	0.90%
Unallocated
Loans Receivable [Line Items]
Ending balance, collectively evaluated for impairment		$ 0		$ 0
Unallocated | Other commercial
Loans Receivable [Line Items]
Ending balance, collectively evaluated for impairment		$ 3,600,000	$ 3,700,000
[1]	Loans held-for-investment ("LHFI") includes $202.5 million and $217.2 million of loans recorded at fair value at March 31, 2017 and December 31, 2016, respectively.
[2]	The Company has interests in certain securitization trusts ("Trusts") that are considered variable interest entities ("VIEs") for accounting purposes. The Company consolidates VIEs where it is deemed the primary beneficiary. See Note 6 to these Condensed Consolidated Financial Statements for additional information.

LOANS AND ALLOWANCE FOR CREDI57

LOANS AND ALLOWANCE FOR CREDIT LOSSES (Portfolio Segments and Classes) (Details) - USD ($) $ in Thousands		Mar. 31, 2017	Dec. 31, 2016
Loans Receivable [Line Items]
Loans held-for-investment	[1],[2]	$ 83,714,900	$ 85,819,785
Commercial
Loans Receivable [Line Items]
Loans held-for-investment		42,311,972	44,440,128
Commercial | Corporate banking
Loans Receivable [Line Items]
Loans held-for-investment		3,505,092	3,693,109
Commercial | Middle market commercial real estate
Loans Receivable [Line Items]
Loans held-for-investment		5,205,976	5,180,572
Commercial | Santander real estate capital
Loans Receivable [Line Items]
Loans held-for-investment		1,172,858	1,238,362
Commercial | Commercial real estate loans
Loans Receivable [Line Items]
Loans held-for-investment		9,883,926	10,112,043
Commercial | Commercial and industrial loans
Loans Receivable [Line Items]
Loans held-for-investment		17,218,865	18,812,002
LHFS		103,800	121,100
Commercial | Multifamily loans
Loans Receivable [Line Items]
Loans held-for-investment		8,462,464	8,683,680
Commercial | Other commercial
Loans Receivable [Line Items]
Loans held-for-investment		6,746,717	6,832,403
Consumer
Loans Receivable [Line Items]
Loans held-for-investment		41,402,928	41,379,657
Consumer | Residential mortgages
Loans Receivable [Line Items]
LHFS		246,900	462,900
Consumer | Retail installment contracts and auto loans
Loans Receivable [Line Items]
Loans held-for-investment		25,706,459	25,573,721
LHFS		773,100	924,700
Consumer | Retail installment contracts and auto loans, originated
Loans Receivable [Line Items]
Loans held-for-investment		22,729,892	22,104,918
Consumer | Personal unsecured loans
Loans Receivable [Line Items]
LHFS		979,100	1,100,000
Consumer loans secured by real estate
Loans Receivable [Line Items]
Loans held-for-investment		13,742,515	13,776,464
Consumer loans secured by real estate | Residential mortgages
Loans Receivable [Line Items]
Loans held-for-investment		7,801,175	7,775,272
Consumer loans secured by real estate | Home equity loans and lines of credit
Loans Receivable [Line Items]
Loans held-for-investment		5,941,340	6,001,192
Consumer loans not secured by real estate | Retail installment contracts and auto loans, originated
Loans Receivable [Line Items]
Loans held-for-investment		22,729,892	22,104,918
Consumer loans not secured by real estate | Retail installment contracts and auto loans, purchased
Loans Receivable [Line Items]
Loans held-for-investment		2,976,567	3,468,803
Consumer loans not secured by real estate | Personal unsecured loans
Loans Receivable [Line Items]
Loans held-for-investment		1,211,922	1,234,094
Consumer loans not secured by real estate | Other consumer
Loans Receivable [Line Items]
Loans held-for-investment		$ 742,032	$ 795,378
[1]	Loans held-for-investment ("LHFI") includes $202.5 million and $217.2 million of loans recorded at fair value at March 31, 2017 and December 31, 2016, respectively.
[2]	The Company has interests in certain securitization trusts ("Trusts") that are considered variable interest entities ("VIEs") for accounting purposes. The Company consolidates VIEs where it is deemed the primary beneficiary. See Note 6 to these Condensed Consolidated Financial Statements for additional information.

LOANS AND ALLOWANCE FOR CREDI58

LOANS AND ALLOWANCE FOR CREDIT LOSSES (Retail Installment Contracts and Auto Loans) (Details) - USD ($) $ in Thousands		Mar. 31, 2017	Dec. 31, 2016
Loans Receivable [Line Items]
Total loans held for investment	[1],[2]	$ 83,714,900	$ 85,819,785
Consumer
Loans Receivable [Line Items]
Total loans held for investment		41,402,928	41,379,657
Consumer | Retail installment contracts and auto loans
Loans Receivable [Line Items]
Total loans held for investment		25,706,459	25,573,721
Consumer | Retail installment contracts, purchased
Loans Receivable [Line Items]
UPB		3,216,330	3,765,714
UPB, FVO		17,321	29,481
Total UPB		3,233,651	3,795,195
Purchase Marks		(257,084)	(326,392)
Total loans held for investment		2,976,567	3,468,803
Purchase marks, FVO		(3,700)	(6,700)
Consumer | Retail installment contracts, originated
Loans Receivable [Line Items]
Total UPB		23,112,453	22,527,753
Net discount		(400,495)	(441,131)
Total loans held for investment		22,711,958	22,086,622
Consumer | Auto loans
Loans Receivable [Line Items]
Total loans held for investment		17,934	18,296
Consumer | Retail installment contracts and auto loans, originated
Loans Receivable [Line Items]
Total loans held for investment		$ 22,729,892	$ 22,104,918
[1]	Loans held-for-investment ("LHFI") includes $202.5 million and $217.2 million of loans recorded at fair value at March 31, 2017 and December 31, 2016, respectively.
[2]	The Company has interests in certain securitization trusts ("Trusts") that are considered variable interest entities ("VIEs") for accounting purposes. The Company consolidates VIEs where it is deemed the primary beneficiary. See Note 6 to these Condensed Consolidated Financial Statements for additional information.

LOANS AND ALLOWANCE FOR CREDI59

LOANS AND ALLOWANCE FOR CREDIT LOSSES (Rollforward of Allowance for Credit Losses) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Allowance for Loan Losses [Roll Forward]
ALLL, beginning of period	$ 3,814,464	$ 3,246,145
Provision for / (release of) loan and lease losses	737,335	873,915
Charge-offs	(1,263,453)	(1,185,169)
Recoveries	634,517	632,972
Charge-offs, net of recoveries	(628,936)	(552,197)
ALLL, end of period	3,922,863	3,567,863
Reserve for Unfunded Lending Commitments Roll Forward [Roll Forward]
Reserve for unfunded lending commitments, beginning of period	122,419	149,021
Provision for unfunded lending commitments	(1,890)	24,547
Loss on unfunded lending commitments	(133)
Reserve for unfunded lending commitments, end of period	120,396	173,568
Total ACL, end of period	4,043,259	3,741,431
Ending balance, individually evaluated for impairment	1,618,459	1,164,533
Ending balance, collectively evaluated for impairment	2,304,404	2,403,330
Financing receivables:
Ending balance	85,817,859	91,144,475
Ending balance, evaluated under the FVO or lower of cost or fair value	2,111,986	2,834,770
Ending balance, individually evaluated for impairment	6,715,810	5,448,929
Ending balance, collectively evaluated for impairment	76,990,063	82,860,776
Commercial
Allowance for Loan Losses [Roll Forward]
ALLL, beginning of period	449,835	456,812
Provision for / (release of) loan and lease losses	18,777	117,933
Charge-offs	(26,173)	(43,009)
Recoveries	10,580	25,907
Charge-offs, net of recoveries	(15,593)	(17,102)
ALLL, end of period	453,019	557,643
Reserve for Unfunded Lending Commitments Roll Forward [Roll Forward]
Reserve for unfunded lending commitments, beginning of period	121,613	148,207
Provision for unfunded lending commitments	(1,860)	24,621
Loss on unfunded lending commitments	(133)
Reserve for unfunded lending commitments, end of period	119,620	172,828
Total ACL, end of period	572,639	730,471
Ending balance, individually evaluated for impairment	99,914	140,463
Ending balance, collectively evaluated for impairment	353,105	417,180
Financing receivables:
Ending balance	42,415,806	47,432,421
Ending balance, evaluated under the FVO or lower of cost or fair value	103,834	0
Ending balance, individually evaluated for impairment	675,116	745,842
Ending balance, collectively evaluated for impairment	41,636,856	46,686,579
Consumer
Allowance for Loan Losses [Roll Forward]
ALLL, beginning of period	3,317,606	2,742,088
Provision for / (release of) loan and lease losses	718,558	755,982
Charge-offs	(1,237,280)	(1,142,160)
Recoveries	623,937	607,065
Charge-offs, net of recoveries	(613,343)	(535,095)
ALLL, end of period	3,422,821	2,962,975
Reserve for Unfunded Lending Commitments Roll Forward [Roll Forward]
Reserve for unfunded lending commitments, beginning of period	806	814
Provision for unfunded lending commitments	(30)	(74)
Loss on unfunded lending commitments	0
Reserve for unfunded lending commitments, end of period	776	740
Total ACL, end of period	3,423,597	2,963,715
Ending balance, individually evaluated for impairment	1,518,545	1,024,070
Ending balance, collectively evaluated for impairment	1,904,276	1,938,905
Financing receivables:
Ending balance	43,402,053	43,712,054
Ending balance, evaluated under the FVO or lower of cost or fair value	2,008,152	2,834,770
Ending balance, individually evaluated for impairment	6,040,694	4,703,087
Ending balance, collectively evaluated for impairment	35,353,207	36,174,197
Consumer | RICs and auto loans - Total
Allowance for Loan Losses [Roll Forward]
ALLL, beginning of period	3,097,219	2,482,796
Provision for / (release of) loan and lease losses	686,649	748,055
Charge-offs	(1,196,739)	(1,089,872)
Recoveries	615,976	585,398
Charge-offs, net of recoveries	(580,763)	(504,474)
ALLL, end of period	3,203,105	2,726,377
Consumer | RICs and auto loans - Purchased
Allowance for Loan Losses [Roll Forward]
ALLL, beginning of period	559,092	590,807
Provision for / (release of) loan and lease losses	26,125	73,635
Charge-offs	(188,686)	(264,792)
Recoveries	98,690	189,457
Charge-offs, net of recoveries	(89,996)	(75,335)
ALLL, end of period	495,221	589,107
Consumer | RICs and auto loans - Originated
Allowance for Loan Losses [Roll Forward]
ALLL, beginning of period	2,538,127	1,891,989
Provision for / (release of) loan and lease losses	660,524	674,420
Charge-offs	(1,008,053)	(825,080)
Recoveries	517,286	395,941
Charge-offs, net of recoveries	(490,767)	(429,139)
ALLL, end of period	2,707,884	2,137,270
Unallocated
Allowance for Loan Losses [Roll Forward]
ALLL, beginning of period	47,023	47,245
Provision for / (release of) loan and lease losses	0	0
Charge-offs	0	0
Recoveries	0	0
Charge-offs, net of recoveries	0	0
ALLL, end of period	47,023	47,245
Reserve for Unfunded Lending Commitments Roll Forward [Roll Forward]
Reserve for unfunded lending commitments, beginning of period	0	0
Provision for unfunded lending commitments	0	0
Loss on unfunded lending commitments	0
Reserve for unfunded lending commitments, end of period	0	0
Total ACL, end of period	47,023	47,245
Ending balance, individually evaluated for impairment	0	0
Ending balance, collectively evaluated for impairment	47,023	47,245
Financing receivables:
Ending balance	0	0
Ending balance, evaluated under the FVO or lower of cost or fair value	0	0
Ending balance, individually evaluated for impairment	0	0
Ending balance, collectively evaluated for impairment	$ 0	$ 0

LOANS AND ALLOWANCE FOR CREDI60

LOANS AND ALLOWANCE FOR CREDIT LOSSES (Non-accrual Loans) (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual loans	$ 2,611,274	$ 2,136,054
Foreclosed and other repossessed assets	180,288	177,592
Nonperforming
Financing Receivable, Recorded Investment, Past Due [Line Items]
Other real estate owned (OREO)	117,845	116,705
Repossessed vehicles	178,747	173,754
Foreclosed and other repossessed assets	1,541	3,838
Total OREO and other repossessed assets	298,133	294,297
Total non-performing assets	2,909,407	2,430,351
Commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual loans	380,495	380,881
Commercial | Corporate banking
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual loans	90,858	104,879
Commercial | Middle market commercial real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual loans	65,395	71,264
Commercial | Santander real estate capital
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual loans	1,620	3,077
Commercial | Commercial and industrial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual loans	211,507	182,368
Commercial | Multifamily
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual loans	5,034	8,196
Commercial | Other commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual loans	6,081	11,097
Consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual loans	2,230,779	1,755,173
Consumer | Residential mortgages
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual loans	278,627	287,140
Consumer | Home equity loans and lines of credit
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual loans	113,395	120,065
Consumer | RICs and auto loans - originated
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual loans	1,471,741	1,045,587
Consumer | RICs and auto loans - purchased
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual loans	350,367	284,486
Consumer | Personal unsecured loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual loans	5,249	5,201
Consumer | Other consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual loans	$ 11,400	$ 12,694

LOANS AND ALLOWANCE FOR CREDI61

LOANS AND ALLOWANCE FOR CREDIT LOSSES (Age Analysis of Past Due Loans) (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	$ 5,151,225	$ 5,332,449
Current	80,666,634	83,073,644
Total Financing Receivables	85,817,859	88,406,093
Recorded Investment Greater than 90 Days and Accruing	82,641	93,846
30-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	4,350,161	4,404,130
Greater Than 90 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	801,064	928,319
Commercial | Corporate banking
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	66,612	55,143
Current	3,438,480	3,637,966
Total Financing Receivables	3,505,092	3,693,109
Recorded Investment Greater than 90 Days and Accruing	0	0
Commercial | Corporate banking | 30-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	28,982	14,973
Commercial | Corporate banking | Greater Than 90 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	37,630	40,170
Commercial | Middle market commercial real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	55,415	64,487
Current	5,150,561	5,116,085
Total Financing Receivables	5,205,976	5,180,572
Recorded Investment Greater than 90 Days and Accruing	0	0
Commercial | Middle market commercial real estate | 30-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	6,856	6,967
Commercial | Middle market commercial real estate | Greater Than 90 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	48,559	57,520
Commercial | Santander real estate capital
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	177
Current	1,172,858	1,238,185
Total Financing Receivables	1,172,858	1,238,362
Recorded Investment Greater than 90 Days and Accruing	0	0
Commercial | Santander real estate capital | 30-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	177
Commercial | Santander real estate capital | Greater Than 90 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
Commercial | Commercial and industrial loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	149,614	79,904
Current	17,173,085	18,853,163
Total Financing Receivables	17,322,699	18,933,067
Recorded Investment Greater than 90 Days and Accruing	0	0
Commercial | Commercial and industrial loans | 30-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	112,319	46,104
Commercial | Commercial and industrial loans | Greater Than 90 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	37,295	33,800
Commercial | Multifamily
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,826	9,472
Current	8,460,638	8,674,208
Total Financing Receivables	8,462,464	8,683,680
Recorded Investment Greater than 90 Days and Accruing	0	0
Commercial | Multifamily | 30-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,064	7,133
Commercial | Multifamily | Greater Than 90 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	762	2,339
Commercial | Other commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	34,944	47,969
Current	6,711,773	6,784,434
Total Financing Receivables	6,746,717	6,832,403
Recorded Investment Greater than 90 Days and Accruing	0	1
Commercial | Other commercial | 30-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	31,996	45,379
Commercial | Other commercial | Greater Than 90 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	2,948	2,590
Consumer | Residential mortgages
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	409,036	455,640
Current	7,639,079	7,782,525
Total Financing Receivables	8,048,115	8,238,165
Recorded Investment Greater than 90 Days and Accruing	0	0
Consumer | Residential mortgages | 30-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	192,400	230,850
Consumer | Residential mortgages | Greater Than 90 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	216,636	224,790
Consumer | Home equity loans and lines of credit
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	107,488	112,877
Current	5,833,852	5,888,315
Total Financing Receivables	5,941,340	6,001,192
Recorded Investment Greater than 90 Days and Accruing	0	0
Consumer | Home equity loans and lines of credit | 30-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	35,718	37,209
Consumer | Home equity loans and lines of credit | Greater Than 90 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	71,770	75,668
Consumer | RICs and auto loans - originated
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	3,319,814	3,388,926
Current	20,183,159	19,640,740
Total Financing Receivables	23,502,973	23,029,666
Recorded Investment Greater than 90 Days and Accruing	0	0
Consumer | RICs and auto loans - originated | 30-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	3,089,483	3,092,841
Consumer | RICs and auto loans - originated | Greater Than 90 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	230,331	296,085
Consumer | RICs and auto loans - purchased
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	774,027	872,266
Current	2,202,539	2,596,537
Total Financing Receivables	2,976,566	3,468,803
Recorded Investment Greater than 90 Days and Accruing	0	0
Consumer | RICs and auto loans - purchased | 30-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	728,397	800,993
Consumer | RICs and auto loans - purchased | Greater Than 90 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	45,630	71,273
Consumer | Personal unsecured loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	190,159	193,222
Current	2,000,868	2,118,474
Total Financing Receivables	2,191,027	2,311,696
Recorded Investment Greater than 90 Days and Accruing	82,641	93,845
Consumer | Personal unsecured loans | 30-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	97,675	89,524
Consumer | Personal unsecured loans | Greater Than 90 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	92,484	103,698
Consumer | Other consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	42,290	52,366
Current	699,742	743,012
Total Financing Receivables	742,032	795,378
Recorded Investment Greater than 90 Days and Accruing	0	0
Consumer | Other consumer | 30-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	25,271	31,980
Consumer | Other consumer | Greater Than 90 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	$ 17,019	$ 20,386

LOANS AND ALLOWANCE FOR CREDI62

LOANS AND ALLOWANCE FOR CREDIT LOSSES (Impaired Loans) (Details) - USD ($)	3 Months Ended	12 Months Ended
	Mar. 31, 2017	Dec. 31, 2016
Loans and Leases Receivable Disclosure [Abstract]
Minimum amount for commercial non-accrual loans (in excess of)	$ 1,000,000
Financing Receivable, Impaired [Line Items]
Impaired financing receivable, recorded investment	6,646,140,000	$ 6,392,653,000
Impaired financing receivable, unpaid principal balance	7,130,191,000	6,897,854,000
Impaired financing receivable, related specific reserves	1,618,459,000	1,618,971,000
Impaired financing receivables, average recorded investment	6,519,401,000	5,647,441,000
Commercial
Financing Receivable, Impaired [Line Items]
Impaired financing receivable, recorded investment	605,437,000	597,288,000
Impaired financing receivable, unpaid principal balance	680,107,000	680,513,000
Impaired financing receivable, related specific reserves	99,914,000	98,596,000
Impaired financing receivables, average recorded investment	601,365,000	513,095,000
Commercial | Corporate banking
Financing Receivable, Impaired [Line Items]
Impaired financing receivable with no related allowance recorded, recorded investment	82,140,000	89,014,000
Impaired financing receivable with related allowance recorded, recorded investment	77,692,000	80,440,000
Impaired financing receivable with no related allowance recorded, unpaid principal balance	91,678,000	106,212,000
Impaired financing receivable with related allowance recorded, unpaid principal balance	81,845,000	85,309,000
Impaired financing receivable, related specific reserves	22,305,000	21,202,000
Impaired financing receivable with no related allowance recorded, average recorded investment	85,577,000	93,495,000
Impaired financing receivable with related allowance recorded, average recorded investment	79,066,000	71,667,000
Commercial | Middle market commercial real estate
Financing Receivable, Impaired [Line Items]
Impaired financing receivable with no related allowance recorded, recorded investment	52,105,000	60,086,000
Impaired financing receivable with related allowance recorded, recorded investment	41,805,000	50,270,000
Impaired financing receivable with no related allowance recorded, unpaid principal balance	75,192,000	83,173,000
Impaired financing receivable with related allowance recorded, unpaid principal balance	60,761,000	66,059,000
Impaired financing receivable, related specific reserves	9,255,000	12,575,000
Impaired financing receivable with no related allowance recorded, average recorded investment	56,096,000	69,206,000
Impaired financing receivable with related allowance recorded, average recorded investment	46,038,000	44,158,000
Commercial | Santander real estate capital
Financing Receivable, Impaired [Line Items]
Impaired financing receivable with no related allowance recorded, recorded investment	1,182,000	2,618,000
Impaired financing receivable with related allowance recorded, recorded investment	8,528,000	8,591,000
Impaired financing receivable with no related allowance recorded, unpaid principal balance	1,182,000	2,618,000
Impaired financing receivable with related allowance recorded, unpaid principal balance	8,528,000	8,591,000
Impaired financing receivable, related specific reserves	1,240,000	890,000
Impaired financing receivable with no related allowance recorded, average recorded investment	1,900,000	2,717,000
Impaired financing receivable with related allowance recorded, average recorded investment	8,560,000	4,623,000
Commercial | Commercial and industrial loans
Financing Receivable, Impaired [Line Items]
Impaired financing receivable with no related allowance recorded, recorded investment	72,633,000	68,135,000
Impaired financing receivable with related allowance recorded, recorded investment	251,976,000	216,578,000
Impaired financing receivable with no related allowance recorded, unpaid principal balance	76,705,000	74,034,000
Impaired financing receivable with related allowance recorded, unpaid principal balance	265,864,000	232,204,000
Impaired financing receivable, related specific reserves	64,723,000	57,855,000
Impaired financing receivable with no related allowance recorded, average recorded investment	70,384,000	40,163,000
Impaired financing receivable with related allowance recorded, average recorded investment	234,277,000	166,999,000
Commercial | Multifamily loans
Financing Receivable, Impaired [Line Items]
Impaired financing receivable with no related allowance recorded, recorded investment	2,196,000	10,370,000
Impaired financing receivable with related allowance recorded, recorded investment	6,973,000	2,930,000
Impaired financing receivable with no related allowance recorded, unpaid principal balance	3,172,000	11,127,000
Impaired financing receivable with related allowance recorded, unpaid principal balance	6,973,000	2,930,000
Impaired financing receivable, related specific reserves	1,115,000	876,000
Impaired financing receivable with no related allowance recorded, average recorded investment	6,283,000	9,919,000
Impaired financing receivable with related allowance recorded, average recorded investment	4,952,000	4,292,000
Commercial | Other commercial
Financing Receivable, Impaired [Line Items]
Impaired financing receivable with no related allowance recorded, recorded investment	735,000	1,038,000
Impaired financing receivable with related allowance recorded, recorded investment	7,472,000	7,218,000
Impaired financing receivable with no related allowance recorded, unpaid principal balance	735,000	1,038,000
Impaired financing receivable with related allowance recorded, unpaid principal balance	7,472,000	7,218,000
Impaired financing receivable, related specific reserves	1,276,000	5,198,000
Impaired financing receivable with no related allowance recorded, average recorded investment	887,000	639,000
Impaired financing receivable with related allowance recorded, average recorded investment	7,345,000	5,217,000
Consumer
Financing Receivable, Impaired [Line Items]
Impaired financing receivable, recorded investment	6,040,703,000	5,795,365,000
Impaired financing receivable, unpaid principal balance	6,450,084,000	6,217,341,000
Impaired financing receivable, related specific reserves	1,518,545,000	1,520,375,000
Impaired financing receivables, average recorded investment	5,918,036,000	5,134,346,000
Consumer | Residential mortgages
Financing Receivable, Impaired [Line Items]
Impaired financing receivable with no related allowance recorded, recorded investment	171,106,000	175,070,000
Impaired financing receivable with related allowance recorded, recorded investment	285,786,000	284,630,000
Impaired financing receivable with no related allowance recorded, unpaid principal balance	218,414,000	222,142,000
Impaired financing receivable with related allowance recorded, unpaid principal balance	324,894,000	324,188,000
Impaired financing receivable, related specific reserves	38,708,000	38,764,000
Impaired financing receivable with no related allowance recorded, average recorded investment	173,088,000	160,373,000
Impaired financing receivable with related allowance recorded, average recorded investment	285,208,000	303,845,000
Consumer | Home equity loans and lines of credit
Financing Receivable, Impaired [Line Items]
Impaired financing receivable with no related allowance recorded, recorded investment	46,872,000	48,872,000
Impaired financing receivable with related allowance recorded, recorded investment	50,948,000	49,862,000
Impaired financing receivable with no related allowance recorded, unpaid principal balance	46,872,000	48,872,000
Impaired financing receivable with related allowance recorded, unpaid principal balance	64,228,000	63,775,000
Impaired financing receivable, related specific reserves	3,069,000	3,467,000
Impaired financing receivable with no related allowance recorded, average recorded investment	47,872,000	39,976,000
Impaired financing receivable with related allowance recorded, average recorded investment	50,405,000	60,855,000
Consumer | RICs and auto loans - originated
Financing Receivable, Impaired [Line Items]
Impaired financing receivable with no related allowance recorded, recorded investment	0	0
Impaired financing receivable with related allowance recorded, recorded investment	3,723,717,000	3,271,316,000
Impaired financing receivable with no related allowance recorded, unpaid principal balance	0	0
Impaired financing receivable with related allowance recorded, unpaid principal balance	3,800,829,000	3,332,297,000
Impaired financing receivable, related specific reserves	1,048,383,000	997,169,000
Impaired financing receivable with no related allowance recorded, average recorded investment	0	8,000
Impaired financing receivable with related allowance recorded, average recorded investment	3,497,517,000	2,298,646,000
Consumer | RICs and auto loans - purchased
Financing Receivable, Impaired [Line Items]
Impaired financing receivable with no related allowance recorded, recorded investment	28,138,000	34,373,000
Impaired financing receivable with related allowance recorded, recorded investment	1,660,016,000	1,855,948,000
Impaired financing receivable with no related allowance recorded, unpaid principal balance	36,061,000	44,296,000
Impaired financing receivable with related allowance recorded, unpaid principal balance	1,876,086,000	2,097,520,000
Impaired financing receivable, related specific reserves	418,907,000	471,687,000
Impaired financing receivable with no related allowance recorded, average recorded investment	31,256,000	55,036,000
Impaired financing receivable with related allowance recorded, average recorded investment	1,757,982,000	2,155,028,000
Consumer | Personal unsecured loans
Financing Receivable, Impaired [Line Items]
Impaired financing receivable with no related allowance recorded, recorded investment	24,382,000	26,008,000
Impaired financing receivable with related allowance recorded, recorded investment	16,961,000	16,858,000
Impaired financing receivable with no related allowance recorded, unpaid principal balance	24,382,000	26,008,000
Impaired financing receivable with related allowance recorded, unpaid principal balance	17,173,000	17,126,000
Impaired financing receivable, related specific reserves	7,162,000	6,846,000
Impaired financing receivable with no related allowance recorded, average recorded investment	25,195,000	19,437,000
Impaired financing receivable with related allowance recorded, average recorded investment	16,910,000	9,349,000
Consumer | Other consumer
Financing Receivable, Impaired [Line Items]
Impaired financing receivable with no related allowance recorded, recorded investment	20,386,000	19,335,000
Impaired financing receivable with related allowance recorded, recorded investment	12,391,000	13,093,000
Impaired financing receivable with no related allowance recorded, unpaid principal balance	24,702,000	23,864,000
Impaired financing receivable with related allowance recorded, unpaid principal balance	16,443,000	17,253,000
Impaired financing receivable, related specific reserves	2,316,000	2,442,000
Impaired financing receivable with no related allowance recorded, average recorded investment	19,861,000	15,915,000
Impaired financing receivable with related allowance recorded, average recorded investment	$ 12,742,000	$ 15,878,000

LOANS AND ALLOWANCE FOR CREDI63

LOANS AND ALLOWANCE FOR CREDIT LOSSES (Lending Asset Quality Indicators) (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Financing Receivable, Recorded Investment [Line Items]
Commercial loans	$ 42,415,806	$ 44,561,193
Pass
Financing Receivable, Recorded Investment [Line Items]
Commercial loans	40,215,000	42,503,076
Special Mention
Financing Receivable, Recorded Investment [Line Items]
Commercial loans	1,184,114	998,605
Substandard
Financing Receivable, Recorded Investment [Line Items]
Commercial loans	918,282	974,190
Doubtful
Financing Receivable, Recorded Investment [Line Items]
Commercial loans	98,410	85,322
Commercial and industrial loans
Financing Receivable, Recorded Investment [Line Items]
Commercial loans	17,322,699	18,933,067
Commercial and industrial loans | Pass
Financing Receivable, Recorded Investment [Line Items]
Commercial loans	16,108,106	17,865,871
Commercial and industrial loans | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Commercial loans	691,575	541,828
Commercial and industrial loans | Substandard
Financing Receivable, Recorded Investment [Line Items]
Commercial loans	479,397	503,185
Commercial and industrial loans | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Commercial loans	43,621	22,183
Multifamily
Financing Receivable, Recorded Investment [Line Items]
Commercial loans	8,462,464	8,683,680
Multifamily | Pass
Financing Receivable, Recorded Investment [Line Items]
Commercial loans	8,291,861	8,515,866
Multifamily | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Commercial loans	130,534	120,731
Multifamily | Substandard
Financing Receivable, Recorded Investment [Line Items]
Commercial loans	40,069	47,083
Multifamily | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Commercial loans	0	0
Remaining commercial
Financing Receivable, Recorded Investment [Line Items]
Commercial loans	6,746,717	6,832,403
Remaining commercial | Pass
Financing Receivable, Recorded Investment [Line Items]
Commercial loans	6,692,843	6,804,184
Remaining commercial | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Commercial loans	24,145	10,651
Remaining commercial | Substandard
Financing Receivable, Recorded Investment [Line Items]
Commercial loans	29,647	11,932
Remaining commercial | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Commercial loans	82	5,636
Commercial | Corporate banking
Financing Receivable, Recorded Investment [Line Items]
Commercial loans	3,505,092	3,693,109
Commercial | Corporate banking | Pass
Financing Receivable, Recorded Investment [Line Items]
Commercial loans	3,093,468	3,303,428
Commercial | Corporate banking | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Commercial loans	174,765	144,125
Commercial | Corporate banking | Substandard
Financing Receivable, Recorded Investment [Line Items]
Commercial loans	212,428	226,206
Commercial | Corporate banking | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Commercial loans	24,431	19,350
Commercial | Middle market commercial real estate
Financing Receivable, Recorded Investment [Line Items]
Commercial loans	5,205,976	5,180,572
Commercial | Middle market commercial real estate | Pass
Financing Receivable, Recorded Investment [Line Items]
Commercial loans	4,900,103	4,843,468
Commercial | Middle market commercial real estate | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Commercial loans	138,376	136,989
Commercial | Middle market commercial real estate | Substandard
Financing Receivable, Recorded Investment [Line Items]
Commercial loans	137,221	161,962
Commercial | Middle market commercial real estate | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Commercial loans	30,276	38,153
Commercial | Santander real estate capital
Financing Receivable, Recorded Investment [Line Items]
Commercial loans	1,172,858	1,238,362
Commercial | Santander real estate capital | Pass
Financing Receivable, Recorded Investment [Line Items]
Commercial loans	1,128,619	1,170,259
Commercial | Santander real estate capital | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Commercial loans	24,719	44,281
Commercial | Santander real estate capital | Substandard
Financing Receivable, Recorded Investment [Line Items]
Commercial loans	19,520	23,822
Commercial | Santander real estate capital | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Commercial loans	$ 0	$ 0

LOANS AND ALLOWANCE FOR CREDI64

LOANS AND ALLOWANCE FOR CREDIT LOSSES (Consumer Lending Asset Quality Indicators - Credit Score) (Details) - Consumer - Retail installment contracts and auto loans - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Loans Receivable [Line Items]
Financing receivable	$ 26,479,539	$ 26,498,469
Percentage of total loans, Retail installment contracts and auto loans	100.00%	100.00%
LHFS	$ 773,100	$ 924,700
FICO score not applicable
Loans Receivable [Line Items]
Financing receivable	$ 4,594,478	$ 4,154,228
Percentage of total loans, Retail installment contracts and auto loans	17.40%	15.70%
FICO score less than 600
Loans Receivable [Line Items]
Financing receivable	$ 13,870,322	$ 14,100,215
Percentage of total loans, Retail installment contracts and auto loans	52.30%	53.20%
FICO score of 600 to 639
Loans Receivable [Line Items]
Financing receivable	$ 4,474,020	$ 4,597,541
Percentage of total loans, Retail installment contracts and auto loans	16.90%	17.40%
FICO score of 640 or greater
Loans Receivable [Line Items]
Financing receivable	$ 3,540,719	$ 3,646,485
Percentage of total loans, Retail installment contracts and auto loans	13.40%	13.70%

LOANS AND ALLOWANCE FOR CREDI65

LOANS AND ALLOWANCE FOR CREDIT LOSSES (Consumer Lending Asset Quality Indicators - FICO and CLTV Range) (Details) - Consumer - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Residential Mortgages
Loans Receivable [Line Items]
Financing receivables	$ 8,048,115	$ 8,238,165
Home Equity Loans and Lines of Credit
Loans Receivable [Line Items]
Financing receivables	5,941,340	6,001,192
LTV not applicable | Residential Mortgages
Loans Receivable [Line Items]
Financing receivables	300,301	697,718
LTV not applicable | Home Equity Loans and Lines of Credit
Loans Receivable [Line Items]
Financing receivables	228,697	250,154
LTV less than or equal to 70% | Residential Mortgages
Loans Receivable [Line Items]
Financing receivables	4,606,894	4,437,478
LTV less than or equal to 70% | Home Equity Loans and Lines of Credit
Loans Receivable [Line Items]
Financing receivables	3,474,500	3,527,373
LTV of 70.01% to 80% | Residential Mortgages
Loans Receivable [Line Items]
Financing receivables	1,699,108	1,627,386
LTV of 70.01% to 90% | Home Equity Loans and Lines of Credit
Loans Receivable [Line Items]
Financing receivables	1,872,905	1,846,703
LTV of 80.01% to 90% | Residential Mortgages
Loans Receivable [Line Items]
Financing receivables	700,844	694,806
LTV of 90.01% to 100% | Residential Mortgages
Loans Receivable [Line Items]
Financing receivables	642,279	672,019
LTV of 90.01% to 110% | Home Equity Loans and Lines of Credit
Loans Receivable [Line Items]
Financing receivables	230,347	238,663
LTV of 100.01% to 110% | Residential Mortgages
Loans Receivable [Line Items]
Financing receivables	38,261	42,970
LTV greater than 110% | Residential Mortgages
Loans Receivable [Line Items]
Financing receivables	60,428	65,788
LTV greater than 110% | Home Equity Loans and Lines of Credit
Loans Receivable [Line Items]
Financing receivables	134,891	138,299
FICO score not applicable | Residential Mortgages
Loans Receivable [Line Items]
Financing receivables	345,765	806,949
FICO score not applicable | Home Equity Loans and Lines of Credit
Loans Receivable [Line Items]
Financing receivables	166,568	173,523
FICO score not applicable | LTV not applicable | Residential Mortgages
Loans Receivable [Line Items]
Financing receivables	299,444	696,730
FICO score not applicable | LTV not applicable | Home Equity Loans and Lines of Credit
Loans Receivable [Line Items]
Financing receivables	166,218	172,836
FICO score not applicable | LTV less than or equal to 70% | Residential Mortgages
Loans Receivable [Line Items]
Financing receivables	22,518	102,911
FICO score not applicable | LTV less than or equal to 70% | Home Equity Loans and Lines of Credit
Loans Receivable [Line Items]
Financing receivables	338	530
FICO score not applicable | LTV of 70.01% to 80% | Residential Mortgages
Loans Receivable [Line Items]
Financing receivables	15,738	4,635
FICO score not applicable | LTV of 70.01% to 90% | Home Equity Loans and Lines of Credit
Loans Receivable [Line Items]
Financing receivables	12	157
FICO score not applicable | LTV of 80.01% to 90% | Residential Mortgages
Loans Receivable [Line Items]
Financing receivables	4,435	2,327
FICO score not applicable | LTV of 90.01% to 100% | Residential Mortgages
Loans Receivable [Line Items]
Financing receivables	3,630	196
FICO score not applicable | LTV of 90.01% to 110% | Home Equity Loans and Lines of Credit
Loans Receivable [Line Items]
Financing receivables	0	0
FICO score not applicable | LTV of 100.01% to 110% | Residential Mortgages
Loans Receivable [Line Items]
Financing receivables	0	150
FICO score not applicable | LTV greater than 110% | Residential Mortgages
Loans Receivable [Line Items]
Financing receivables	0	0
FICO score not applicable | LTV greater than 110% | Home Equity Loans and Lines of Credit
Loans Receivable [Line Items]
Financing receivables	0	0
FICO score less than 600 | Residential Mortgages
Loans Receivable [Line Items]
Financing receivables	402,716	392,147
FICO score less than 600 | Home Equity Loans and Lines of Credit
Loans Receivable [Line Items]
Financing receivables	271,544	268,504
FICO score less than 600 | LTV not applicable | Residential Mortgages
Loans Receivable [Line Items]
Financing receivables	74	80
FICO score less than 600 | LTV not applicable | Home Equity Loans and Lines of Credit
Loans Receivable [Line Items]
Financing receivables	9,696	10,198
FICO score less than 600 | LTV less than or equal to 70% | Residential Mortgages
Loans Receivable [Line Items]
Financing receivables	249,791	228,794
FICO score less than 600 | LTV less than or equal to 70% | Home Equity Loans and Lines of Credit
Loans Receivable [Line Items]
Financing receivables	165,358	166,702
FICO score less than 600 | LTV of 70.01% to 80% | Residential Mortgages
Loans Receivable [Line Items]
Financing receivables	67,644	70,793
FICO score less than 600 | LTV of 70.01% to 90% | Home Equity Loans and Lines of Credit
Loans Receivable [Line Items]
Financing receivables	66,917	64,446
FICO score less than 600 | LTV of 80.01% to 90% | Residential Mortgages
Loans Receivable [Line Items]
Financing receivables	47,400	49,253
FICO score less than 600 | LTV of 90.01% to 100% | Residential Mortgages
Loans Receivable [Line Items]
Financing receivables	29,611	30,720
FICO score less than 600 | LTV of 90.01% to 110% | Home Equity Loans and Lines of Credit
Loans Receivable [Line Items]
Financing receivables	16,409	14,474
FICO score less than 600 | LTV of 100.01% to 110% | Residential Mortgages
Loans Receivable [Line Items]
Financing receivables	3,899	6,622
FICO score less than 600 | LTV greater than 110% | Residential Mortgages
Loans Receivable [Line Items]
Financing receivables	4,297	5,885
FICO score less than 600 | LTV greater than 110% | Home Equity Loans and Lines of Credit
Loans Receivable [Line Items]
Financing receivables	13,164	12,684
FICO score of 600 to 639 | Residential Mortgages
Loans Receivable [Line Items]
Financing receivables	288,870	296,893
FICO score of 600 to 639 | Home Equity Loans and Lines of Credit
Loans Receivable [Line Items]
Financing receivables	246,618	244,957
FICO score of 600 to 639 | LTV not applicable | Residential Mortgages
Loans Receivable [Line Items]
Financing receivables	49	147
FICO score of 600 to 639 | LTV not applicable | Home Equity Loans and Lines of Credit
Loans Receivable [Line Items]
Financing receivables	7,033	7,323
FICO score of 600 to 639 | LTV less than or equal to 70% | Residential Mortgages
Loans Receivable [Line Items]
Financing receivables	155,608	152,728
FICO score of 600 to 639 | LTV less than or equal to 70% | Home Equity Loans and Lines of Credit
Loans Receivable [Line Items]
Financing receivables	148,208	143,666
FICO score of 600 to 639 | LTV of 70.01% to 80% | Residential Mortgages
Loans Receivable [Line Items]
Financing receivables	48,930	48,006
FICO score of 600 to 639 | LTV of 70.01% to 90% | Home Equity Loans and Lines of Credit
Loans Receivable [Line Items]
Financing receivables	71,034	68,415
FICO score of 600 to 639 | LTV of 80.01% to 90% | Residential Mortgages
Loans Receivable [Line Items]
Financing receivables	39,284	42,443
FICO score of 600 to 639 | LTV of 90.01% to 100% | Residential Mortgages
Loans Receivable [Line Items]
Financing receivables	34,524	42,356
FICO score of 600 to 639 | LTV of 90.01% to 110% | Home Equity Loans and Lines of Credit
Loans Receivable [Line Items]
Financing receivables	11,296	16,680
FICO score of 600 to 639 | LTV of 100.01% to 110% | Residential Mortgages
Loans Receivable [Line Items]
Financing receivables	4,928	4,538
FICO score of 600 to 639 | LTV greater than 110% | Residential Mortgages
Loans Receivable [Line Items]
Financing receivables	5,547	6,675
FICO score of 600 to 639 | LTV greater than 110% | Home Equity Loans and Lines of Credit
Loans Receivable [Line Items]
Financing receivables	9,047	8,873
FICO Score of 640 to 679 | Residential Mortgages
Loans Receivable [Line Items]
Financing receivables	610,350	569,344
FICO Score of 640 to 679 | Home Equity Loans and Lines of Credit
Loans Receivable [Line Items]
Financing receivables	460,794	471,028
FICO Score of 640 to 679 | LTV not applicable | Residential Mortgages
Loans Receivable [Line Items]
Financing receivables	153	98
FICO Score of 640 to 679 | LTV not applicable | Home Equity Loans and Lines of Credit
Loans Receivable [Line Items]
Financing receivables	7,464	10,225
FICO Score of 640 to 679 | LTV less than or equal to 70% | Residential Mortgages
Loans Receivable [Line Items]
Financing receivables	315,898	283,054
FICO Score of 640 to 679 | LTV less than or equal to 70% | Home Equity Loans and Lines of Credit
Loans Receivable [Line Items]
Financing receivables	266,495	278,913
FICO Score of 640 to 679 | LTV of 70.01% to 80% | Residential Mortgages
Loans Receivable [Line Items]
Financing receivables	99,914	101,495
FICO Score of 640 to 679 | LTV of 70.01% to 90% | Home Equity Loans and Lines of Credit
Loans Receivable [Line Items]
Financing receivables	145,082	139,940
FICO Score of 640 to 679 | LTV of 80.01% to 90% | Residential Mortgages
Loans Receivable [Line Items]
Financing receivables	84,830	81,669
FICO Score of 640 to 679 | LTV of 90.01% to 100% | Residential Mortgages
Loans Receivable [Line Items]
Financing receivables	95,600	93,552
FICO Score of 640 to 679 | LTV of 90.01% to 110% | Home Equity Loans and Lines of Credit
Loans Receivable [Line Items]
Financing receivables	25,999	27,823
FICO Score of 640 to 679 | LTV of 100.01% to 110% | Residential Mortgages
Loans Receivable [Line Items]
Financing receivables	5,320	5,287
FICO Score of 640 to 679 | LTV greater than 110% | Residential Mortgages
Loans Receivable [Line Items]
Financing receivables	8,635	4,189
FICO Score of 640 to 679 | LTV greater than 110% | Home Equity Loans and Lines of Credit
Loans Receivable [Line Items]
Financing receivables	15,754	14,127
FICO Score of 680 to 719 | Residential Mortgages
Loans Receivable [Line Items]
Financing receivables	1,035,335	982,308
FICO Score of 680 to 719 | Home Equity Loans and Lines of Credit
Loans Receivable [Line Items]
Financing receivables	802,766	808,882
FICO Score of 680 to 719 | LTV not applicable | Residential Mortgages
Loans Receivable [Line Items]
Financing receivables	49	112
FICO Score of 680 to 719 | LTV not applicable | Home Equity Loans and Lines of Credit
Loans Receivable [Line Items]
Financing receivables	8,942	11,507
FICO Score of 680 to 719 | LTV less than or equal to 70% | Residential Mortgages
Loans Receivable [Line Items]
Financing receivables	529,557	487,257
FICO Score of 680 to 719 | LTV less than or equal to 70% | Home Equity Loans and Lines of Credit
Loans Receivable [Line Items]
Financing receivables	461,925	461,285
FICO Score of 680 to 719 | LTV of 70.01% to 80% | Residential Mortgages
Loans Receivable [Line Items]
Financing receivables	211,825	193,351
FICO Score of 680 to 719 | LTV of 70.01% to 90% | Home Equity Loans and Lines of Credit
Loans Receivable [Line Items]
Financing receivables	272,541	271,264
FICO Score of 680 to 719 | LTV of 80.01% to 90% | Residential Mortgages
Loans Receivable [Line Items]
Financing receivables	134,939	136,937
FICO Score of 680 to 719 | LTV of 90.01% to 100% | Residential Mortgages
Loans Receivable [Line Items]
Financing receivables	141,692	146,090
FICO Score of 680 to 719 | LTV of 90.01% to 110% | Home Equity Loans and Lines of Credit
Loans Receivable [Line Items]
Financing receivables	38,428	39,668
FICO Score of 680 to 719 | LTV of 100.01% to 110% | Residential Mortgages
Loans Receivable [Line Items]
Financing receivables	5,622	6,766
FICO Score of 680 to 719 | LTV greater than 110% | Residential Mortgages
Loans Receivable [Line Items]
Financing receivables	11,651	11,795
FICO Score of 680 to 719 | LTV greater than 110% | Home Equity Loans and Lines of Credit
Loans Receivable [Line Items]
Financing receivables	20,930	25,158
FICO Score of 720 to 759 | Residential Mortgages
Loans Receivable [Line Items]
Financing receivables	1,574,926	1,482,176
FICO Score of 720 to 759 | Home Equity Loans and Lines of Credit
Loans Receivable [Line Items]
Financing receivables	1,109,927	1,132,147
FICO Score of 720 to 759 | LTV not applicable | Residential Mortgages
Loans Receivable [Line Items]
Financing receivables	16	56
FICO Score of 720 to 759 | LTV not applicable | Home Equity Loans and Lines of Credit
Loans Receivable [Line Items]
Financing receivables	10,061	12,640
FICO Score of 720 to 759 | LTV less than or equal to 70% | Residential Mortgages
Loans Receivable [Line Items]
Financing receivables	842,347	767,192
FICO Score of 720 to 759 | LTV less than or equal to 70% | Home Equity Loans and Lines of Credit
Loans Receivable [Line Items]
Financing receivables	647,477	662,217
FICO Score of 720 to 759 | LTV of 70.01% to 80% | Residential Mortgages
Loans Receivable [Line Items]
Financing receivables	397,595	348,524
FICO Score of 720 to 759 | LTV of 70.01% to 90% | Home Equity Loans and Lines of Credit
Loans Receivable [Line Items]
Financing receivables	384,010	383,186
FICO Score of 720 to 759 | LTV of 80.01% to 90% | Residential Mortgages
Loans Receivable [Line Items]
Financing receivables	160,548	163,163
FICO Score of 720 to 759 | LTV of 90.01% to 100% | Residential Mortgages
Loans Receivable [Line Items]
Financing receivables	152,397	178,264
FICO Score of 720 to 759 | LTV of 90.01% to 110% | Home Equity Loans and Lines of Credit
Loans Receivable [Line Items]
Financing receivables	43,253	45,496
FICO Score of 720 to 759 | LTV of 100.01% to 110% | Residential Mortgages
Loans Receivable [Line Items]
Financing receivables	8,308	8,473
FICO Score of 720 to 759 | LTV greater than 110% | Residential Mortgages
Loans Receivable [Line Items]
Financing receivables	13,715	16,504
FICO Score of 720 to 759 | LTV greater than 110% | Home Equity Loans and Lines of Credit
Loans Receivable [Line Items]
Financing receivables	25,126	28,608
FICO Score Equal to or Greater than 760 | Residential Mortgages
Loans Receivable [Line Items]
Financing receivables	3,790,153	3,708,348
FICO Score Equal to or Greater than 760 | Home Equity Loans and Lines of Credit
Loans Receivable [Line Items]
Financing receivables	2,883,123	2,902,151
FICO Score Equal to or Greater than 760 | LTV not applicable | Residential Mortgages
Loans Receivable [Line Items]
Financing receivables	516	495
FICO Score Equal to or Greater than 760 | LTV not applicable | Home Equity Loans and Lines of Credit
Loans Receivable [Line Items]
Financing receivables	19,283	25,425
FICO Score Equal to or Greater than 760 | LTV less than or equal to 70% | Residential Mortgages
Loans Receivable [Line Items]
Financing receivables	2,491,175	2,415,542
FICO Score Equal to or Greater than 760 | LTV less than or equal to 70% | Home Equity Loans and Lines of Credit
Loans Receivable [Line Items]
Financing receivables	1,784,699	1,814,060
FICO Score Equal to or Greater than 760 | LTV of 70.01% to 80% | Residential Mortgages
Loans Receivable [Line Items]
Financing receivables	857,462	860,582
FICO Score Equal to or Greater than 760 | LTV of 70.01% to 90% | Home Equity Loans and Lines of Credit
Loans Receivable [Line Items]
Financing receivables	933,309	919,295
FICO Score Equal to or Greater than 760 | LTV of 80.01% to 90% | Residential Mortgages
Loans Receivable [Line Items]
Financing receivables	229,408	219,014
FICO Score Equal to or Greater than 760 | LTV of 90.01% to 100% | Residential Mortgages
Loans Receivable [Line Items]
Financing receivables	184,825	180,841
FICO Score Equal to or Greater than 760 | LTV of 90.01% to 110% | Home Equity Loans and Lines of Credit
Loans Receivable [Line Items]
Financing receivables	94,962	94,522
FICO Score Equal to or Greater than 760 | LTV of 100.01% to 110% | Residential Mortgages
Loans Receivable [Line Items]
Financing receivables	10,184	11,134
FICO Score Equal to or Greater than 760 | LTV greater than 110% | Residential Mortgages
Loans Receivable [Line Items]
Financing receivables	16,583	20,740
FICO Score Equal to or Greater than 760 | LTV greater than 110% | Home Equity Loans and Lines of Credit
Loans Receivable [Line Items]
Financing receivables	$ 50,870	$ 48,849

LOANS AND ALLOWANCE FOR CREDI66

LOANS AND ALLOWANCE FOR CREDIT LOSSES (Troubled Debt Restructuring Activity) (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2017USD ($)contract	Mar. 31, 2016USD ($)contract	Dec. 31, 2016USD ($)
Financing Receivable, Modifications [Line Items]
Troubled debt restructurings	$ 6,379,193		$ 6,106,915
Number of Contracts | contract	69,155	59,471
Pre-TDR Recorded Investment	$ 989,321	$ 788,949
Post-TDR Recorded Investment	$ 988,436	$ 777,260
TDRs which Subsequently Defaulted
Number of Contracts | contract	13,296	14,850
Recorded Investment	$ 230,756	$ 230,774
Term Extension
Financing Receivable, Modifications [Line Items]
Post-TDR Recorded Investment	(945)	(567)
Principal Forbearance
Financing Receivable, Modifications [Line Items]
Post-TDR Recorded Investment	1	(10,583)
Other
Financing Receivable, Modifications [Line Items]
Post-TDR Recorded Investment	$ 59	$ (539)
Commercial | Corporate banking
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	24	9
Pre-TDR Recorded Investment	$ 30,001	$ 47,776
Post-TDR Recorded Investment	$ 30,340	$ 37,166
TDRs which Subsequently Defaulted
Number of Contracts | contract	3	2
Recorded Investment	$ 1,278	$ 1,238
Commercial | Corporate banking | Term Extension
Financing Receivable, Modifications [Line Items]
Post-TDR Recorded Investment	(2)	(16)
Commercial | Corporate banking | Principal Forbearance
Financing Receivable, Modifications [Line Items]
Post-TDR Recorded Investment	1	(10,583)
Commercial | Corporate banking | Other
Financing Receivable, Modifications [Line Items]
Post-TDR Recorded Investment	$ 340	$ (11)
Commercial | Middle market commercial real estate
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract		3
Pre-TDR Recorded Investment		$ 10,454
Post-TDR Recorded Investment		$ 10,385
TDRs which Subsequently Defaulted
Number of Contracts | contract	32	20
Recorded Investment	$ 6,443	$ 3,746
Commercial | Middle market commercial real estate | Term Extension
Financing Receivable, Modifications [Line Items]
Post-TDR Recorded Investment		0
Commercial | Middle market commercial real estate | Principal Forbearance
Financing Receivable, Modifications [Line Items]
Post-TDR Recorded Investment		0
Commercial | Middle market commercial real estate | Other
Financing Receivable, Modifications [Line Items]
Post-TDR Recorded Investment		$ (69)
Commercial | Commercial and industrial
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	242	223
Pre-TDR Recorded Investment	$ 8,034	$ 7,230
Post-TDR Recorded Investment	$ 8,030	$ 7,229
TDRs which Subsequently Defaulted
Number of Contracts | contract	66	63
Recorded Investment	$ 2,887	$ 4,009
Commercial | Commercial and industrial | Term Extension
Financing Receivable, Modifications [Line Items]
Post-TDR Recorded Investment	(4)	(1)
Commercial | Commercial and industrial | Principal Forbearance
Financing Receivable, Modifications [Line Items]
Post-TDR Recorded Investment	0	0
Commercial | Commercial and industrial | Other
Financing Receivable, Modifications [Line Items]
Post-TDR Recorded Investment	$ 0	$ 0
Consumer | Residential mortgages
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	89	49
Pre-TDR Recorded Investment	$ 15,993	$ 6,648
Post-TDR Recorded Investment	$ 15,810	$ 6,852
TDRs which Subsequently Defaulted
Number of Contracts | contract	29	31
Recorded Investment	$ 4,161	$ 4,838
Consumer | Residential mortgages | Term Extension
Financing Receivable, Modifications [Line Items]
Post-TDR Recorded Investment	0	(1)
Consumer | Residential mortgages | Principal Forbearance
Financing Receivable, Modifications [Line Items]
Post-TDR Recorded Investment	0	0
Consumer | Residential mortgages | Other
Financing Receivable, Modifications [Line Items]
Post-TDR Recorded Investment	$ (183)	$ 205
Consumer | Home equity loans and lines of credit
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	19	67
Pre-TDR Recorded Investment	$ 1,432	$ 4,539
Post-TDR Recorded Investment	$ 1,553	$ 4,434
TDRs which Subsequently Defaulted
Number of Contracts | contract	2	5
Recorded Investment	$ 173	$ 341
Consumer | Home equity loans and lines of credit | Term Extension
Financing Receivable, Modifications [Line Items]
Post-TDR Recorded Investment	0	132
Consumer | Home equity loans and lines of credit | Principal Forbearance
Financing Receivable, Modifications [Line Items]
Post-TDR Recorded Investment	0	0
Consumer | Home equity loans and lines of credit | Other
Financing Receivable, Modifications [Line Items]
Post-TDR Recorded Investment	$ 121	$ (237)
Consumer | Retail installment contracts and auto loans
TDRs which Subsequently Defaulted
Number of Contracts | contract	12,281	13,124
Recorded Investment	$ 214,002	$ 214,702
Consumer | Retail installment contracts and auto loans, originated
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	50,910	27,695
Pre-TDR Recorded Investment	$ 906,599	$ 514,066
Post-TDR Recorded Investment	905,558	513,922
Consumer | Retail installment contracts and auto loans, originated | Term Extension
Financing Receivable, Modifications [Line Items]
Post-TDR Recorded Investment	(934)	(83)
Consumer | Retail installment contracts and auto loans, originated | Principal Forbearance
Financing Receivable, Modifications [Line Items]
Post-TDR Recorded Investment	0	0
Consumer | Retail installment contracts and auto loans, originated | Other
Financing Receivable, Modifications [Line Items]
Post-TDR Recorded Investment	$ (107)	$ (61)
Consumer | Retail installment contracts and auto loans, purchased
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	55	14,344
Pre-TDR Recorded Investment	$ 289	$ 175,968
Post-TDR Recorded Investment	282	175,311
Consumer | Retail installment contracts and auto loans, purchased | Term Extension
Financing Receivable, Modifications [Line Items]
Post-TDR Recorded Investment	(5)	(598)
Consumer | Retail installment contracts and auto loans, purchased | Principal Forbearance
Financing Receivable, Modifications [Line Items]
Post-TDR Recorded Investment	0	0
Consumer | Retail installment contracts and auto loans, purchased | Other
Financing Receivable, Modifications [Line Items]
Post-TDR Recorded Investment	$ (2)	$ (59)
Consumer | Personal unsecured loans
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	17,757	17,055
Pre-TDR Recorded Investment	$ 24,855	$ 21,345
Post-TDR Recorded Investment	$ 24,746	$ 21,216
TDRs which Subsequently Defaulted
Number of Contracts | contract	874	1,599
Recorded Investment	$ 1,707	$ 1,827
Consumer | Personal unsecured loans | Term Extension
Financing Receivable, Modifications [Line Items]
Post-TDR Recorded Investment	0	0
Consumer | Personal unsecured loans | Principal Forbearance
Financing Receivable, Modifications [Line Items]
Post-TDR Recorded Investment	0	0
Consumer | Personal unsecured loans | Other
Financing Receivable, Modifications [Line Items]
Post-TDR Recorded Investment	$ (109)	$ (129)
Consumer | Other consumer
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	59	26
Pre-TDR Recorded Investment	$ 2,118	$ 923
Post-TDR Recorded Investment	$ 2,117	$ 745
TDRs which Subsequently Defaulted
Number of Contracts | contract	9	6
Recorded Investment	$ 105	$ 73
Consumer | Other consumer | Term Extension
Financing Receivable, Modifications [Line Items]
Post-TDR Recorded Investment	0	0
Consumer | Other consumer | Principal Forbearance
Financing Receivable, Modifications [Line Items]
Post-TDR Recorded Investment	0	0
Consumer | Other consumer | Other
Financing Receivable, Modifications [Line Items]
Post-TDR Recorded Investment	(1)	$ (178)
Performing
Financing Receivable, Modifications [Line Items]
Troubled debt restructurings	4,734,246		5,169,788
Non-performing
Financing Receivable, Modifications [Line Items]
Troubled debt restructurings	$ 1,644,947		$ 937,127

OPERATING LEASE ASSETS, NET (Co

OPERATING LEASE ASSETS, NET (Components of Leased Vehicles, Net) (Details) - USD ($) $ in Thousands		Mar. 31, 2017	Dec. 31, 2016
Operating Leased Assets [Line Items]
Total operating lease assets, net	[1],[2]	$ 9,799,941	$ 9,747,223
Vehicles
Operating Leased Assets [Line Items]
Operating leases		13,641,234	13,603,494
Origination fees and other costs		24,156	23,141
Manufacturer subvention payments		(1,176,686)	(1,126,323)
Leased vehicles, gross		12,488,704	12,500,312
Less: accumulated depreciation		(2,752,676)	(2,811,855)
Total operating lease assets, net		9,736,028	9,688,457
Commercial Equipment Vehicles and Aircraft
Operating Leased Assets [Line Items]
Operating leases		73,041	65,401
Less: accumulated depreciation		(9,128)	(6,635)
Total operating lease assets, net		$ 63,913	$ 58,766
[1]	Net of accumulated depreciation of $2.8 billion and $2.8 billion at March 31, 2017 and December 31, 2016, respectively.
[2]	The Company has interests in certain securitization trusts ("Trusts") that are considered variable interest entities ("VIEs") for accounting purposes. The Company consolidates VIEs where it is deemed the primary beneficiary. See Note 6 to these Condensed Consolidated Financial Statements for additional information.

OPERATING LEASE ASSETS, NET (Fu

OPERATING LEASE ASSETS, NET (Future Minimum Rental Receivables) (Details) $ in Thousands	Mar. 31, 2017USD ($)
Leases [Abstract]
2,017	$ 1,288,754
2,018	1,113,314
2,019	445,105
2,020	28,504
2,021	79
Thereafter	0
Total	$ 2,875,756

OPERATING LEASE ASSETS, NET (Na

OPERATING LEASE ASSETS, NET (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Leases [Abstract]
Lease income	$ 496,045	$ 420,856
Lease expense	$ 358,792	$ 292,835

VARIABLE INTEREST ENTITIES (Ass

VARIABLE INTEREST ENTITIES (Assets and Liabilities of VIEs) (Details) - USD ($) $ in Thousands		Mar. 31, 2017	Dec. 31, 2016	Mar. 31, 2016
Assets
Restricted cash	[1]	$ 3,283,356	$ 3,016,948
Loans	[2]	2,102,959	2,586,308
Operating lease assets, net	[1],[3]	9,799,941	9,747,223
Various other assets	[1],[4]	2,350,486	1,893,101
TOTAL ASSETS		135,109,476	137,370,523	$ 145,220,888
Liabilities
Various other liabilities	[1]	797,142	810,872
TOTAL LIABILITIES		112,509,726	114,991,765
VIEs, Primary Beneficiary
Assets
Restricted cash		2,437,776	2,087,177
Loans		23,538,934	23,568,066
Operating lease assets, net		8,927,536	8,564,628
Various other assets		705,569	686,253
TOTAL ASSETS		35,609,815	34,906,124
Liabilities
Notes payable		30,847,859	31,667,976
Various other liabilities		111,075	91,234
TOTAL LIABILITIES		30,958,934	31,759,210
VIEs, Primary Beneficiary | Retail installment contracts held for sale
Assets
RICs held for sale		$ 859,400	$ 1,000,000
[1]	The Company has interests in certain securitization trusts ("Trusts") that are considered variable interest entities ("VIEs") for accounting purposes. The Company consolidates VIEs where it is deemed the primary beneficiary. See Note 6 to these Condensed Consolidated Financial Statements for additional information.
[2]	Recorded at the fair value option ("FVO") or lower of cost or fair value.
[3]	Net of accumulated depreciation of $2.8 billion and $2.8 billion at March 31, 2017 and December 31, 2016, respectively.
[4]	Includes mortgage servicing rights ("MSRs") of $149.5 million and $146.6 million at March 31, 2017 and December 31, 2016, respectively, for which the Company has elected the FVO. See Note 8 to these Condensed Consolidated Financial Statements for additional information.

VARIABLE INTEREST ENTITIES (Nar

VARIABLE INTEREST ENTITIES (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2017	Dec. 31, 2016
VIE, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Sales of receivables securitization	$ 700
Loss on retail installment contracts	2.7
Trusts | VIE, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Gross retail installment contracts transferred to consolidated Trusts	27,400	$ 27,400
Off-balance Securitization Trusts
Variable Interest Entity [Line Items]
Proceeds from securitization of retail installment contracts	$ 2,900	$ 2,700

VARIABLE INTEREST ENTITIES (Cas

VARIABLE INTEREST ENTITIES (Cash Flow Summary) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
VIE, Primary Beneficiary | Trusts
Variable Interest Entity [Line Items]
Assets securitized	$ 7,646,625	$ 3,657,955
Net proceeds from new securitizations	5,576,801	2,702,004
Net proceeds from sale of retained bonds	115,970	0
Cash received for servicing fees	208,923	194,365
Net distributions from Trusts	678,229	629,726
Total cash received from Trusts	6,579,923	3,526,095
VIE, Not Primary Beneficiary | Off-balance Securitization Trusts
Variable Interest Entity [Line Items]
Assets securitized	700,022	0
Net proceeds from new securitizations	702,319	0
Cash received for servicing fees	1,398	15,701
Total cash received from Trusts	$ 703,717	$ 15,701

VARIABLE INTEREST ENTITIES (Off

VARIABLE INTEREST ENTITIES (Off-balance Sheet Portfolio) (Details) - VIE, Not Primary Beneficiary - USD ($)	Mar. 31, 2017	Dec. 31, 2016
Variable Interest Entity [Line Items]
Total serviced for other portfolio	$ 2,943,905,000	$ 2,741,101,000
VIE, maximum exposure to loss	0
Chrysler Capital securitizations
Variable Interest Entity [Line Items]
Total serviced for other portfolio	2,188,452,000	2,741,101,000
Other third parties
Variable Interest Entity [Line Items]
Total serviced for other portfolio	89,107,000	0
Third parties
Variable Interest Entity [Line Items]
Total serviced for other portfolio	2,277,559,000	2,741,101,000
SC
Variable Interest Entity [Line Items]
Total serviced for other portfolio	$ 666,346,000	$ 0

GOODWILL AND OTHER INTANGIBLE74

GOODWILL AND OTHER INTANGIBLES (Goodwill) (Details) - USD ($)	Oct. 01, 2016	Mar. 31, 2017
Goodwill [Roll Forward]
Goodwill, Beginning balance		$ 4,454,925,000
Disposals during the period		0
Additions during the period		0
Re-allocations during the period		0
Impairment during the period	$ 0	0
Goodwill, Ending balance		4,454,925,000
Consumer and Business Banking
Goodwill [Roll Forward]
Goodwill, Beginning balance		1,880,303,000
Disposals during the period		0
Additions during the period		0
Re-allocations during the period		0
Impairment during the period		0
Goodwill, Ending balance		1,880,303,000
Commercial Real Estate
Goodwill [Roll Forward]
Goodwill, Beginning balance		870,411,000
Disposals during the period		0
Additions during the period		0
Re-allocations during the period		0
Impairment during the period		0
Goodwill, Ending balance		870,411,000
Commercial Banking
Goodwill [Roll Forward]
Goodwill, Beginning balance		542,584,000
Disposals during the period		0
Additions during the period		0
Re-allocations during the period		0
Impairment during the period		0
Goodwill, Ending balance		542,584,000
Global Corporate Banking
Goodwill [Roll Forward]
Goodwill, Beginning balance		131,130,000
Disposals during the period		0
Additions during the period		0
Re-allocations during the period		0
Impairment during the period		0
Goodwill, Ending balance		131,130,000
SC
Goodwill [Roll Forward]
Goodwill, Beginning balance		1,019,960,000
Disposals during the period		0
Additions during the period		0
Re-allocations during the period		0
Impairment during the period		0
Goodwill, Ending balance		1,019,960,000
Santander BanCorp
Goodwill [Roll Forward]
Goodwill, Beginning balance		10,537,000
Disposals during the period		0
Additions during the period		0
Re-allocations during the period		0
Impairment during the period		0
Goodwill, Ending balance		$ 10,537,000

GOODWILL AND OTHER INTANGIBLE75

GOODWILL AND OTHER INTANGIBLES (Narrative) (Details) - USD ($)	Oct. 01, 2016	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Finite-Lived Intangible Assets [Line Items]
Impairment during the period	$ 0	$ 0
Amortization of intangibles		$ 15,491,000	$ 17,932,000
Core deposit intangibles
Finite-Lived Intangible Assets [Line Items]
Intangible asset useful life				10 years
Customer relationships | BSI
Finite-Lived Intangible Assets [Line Items]
Amortization of intangibles				$ 48,500,000

GOODWILL AND OTHER INTANGIBLE76

GOODWILL AND OTHER INTANGIBLES (Finite-lived Intangibles) (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Finite-Lived Intangible Assets [Line Items]
Net Carrying Amount	$ 581,753	$ 597,244
Accumulated Amortization	(224,528)	(553,359)
Dealer networks
Finite-Lived Intangible Assets [Line Items]
Net Carrying Amount	455,821	465,625
Accumulated Amortization	(124,179)	(114,375)
Chrysler relationship
Finite-Lived Intangible Assets [Line Items]
Net Carrying Amount	91,250	95,000
Accumulated Amortization	(47,500)	(43,750)
Core deposit intangibles
Finite-Lived Intangible Assets [Line Items]
Net Carrying Amount	0	0
Accumulated Amortization	0	(295,842)
Trade name
Finite-Lived Intangible Assets [Line Items]
Net Carrying Amount	16,800	17,100
Accumulated Amortization	(1,200)	(900)
Other intangibles
Finite-Lived Intangible Assets [Line Items]
Net Carrying Amount	17,882	19,519
Accumulated Amortization	$ (51,649)	$ (98,492)

GOODWILL AND OTHER INTANGIBLE77

GOODWILL AND OTHER INTANGIBLES (Future Amortization Expense) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Goodwill and Intangible Assets Disclosure [Abstract]
2017, Calendar Year Amount	$ 61,491
2017, Recorded To Date	15,491	$ 17,932
2017, Remaining Amount To Record	46,000
2,018	60,644
2,019	58,975
2,020	58,642
2,021	55,603
Thereafter	$ 301,889

OTHER ASSETS (Other Assets Sche

OTHER ASSETS (Other Assets Schedule) (Details) - USD ($) $ in Thousands		Mar. 31, 2017	Dec. 31, 2016
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Income tax receivables		$ 296,305	$ 294,796
Derivative assets at fair value		407,568	413,779
Other repossessed assets		180,288	177,592
MSRs		153,114	150,343
Prepaid expenses		171,836	172,559
OREO		117,845	116,705
Miscellaneous assets and receivables		1,023,530	567,327
Total other assets	[1],[2]	$ 2,350,486	$ 1,893,101
[1]	Includes mortgage servicing rights ("MSRs") of $149.5 million and $146.6 million at March 31, 2017 and December 31, 2016, respectively, for which the Company has elected the FVO. See Note 8 to these Condensed Consolidated Financial Statements for additional information.
[2]	The Company has interests in certain securitization trusts ("Trusts") that are considered variable interest entities ("VIEs") for accounting purposes. The Company consolidates VIEs where it is deemed the primary beneficiary. See Note 6 to these Condensed Consolidated Financial Statements for additional information.

OTHER ASSETS (Narrative) (Detai

OTHER ASSETS (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016	Dec. 31, 2015
Servicing Assets [Line Items]
Mortgage servicing fee income	$ 10,600	$ 10,800
Gains (losses) on sale of mortgage loans	4,400	3,500
Miscellaneous assets and receivables	1,023,530		$ 567,327
SIS | Brazilian government bonds
Servicing Assets [Line Items]
Miscellaneous assets and receivables	434,100
Residential mortgages
Servicing Assets [Line Items]
Principal balance of loans serviced for others	15,500,000		15,400,000
MSRs	149,455	130,743	$ 146,589	$ 147,233
Net changes in the fair value of MSRs	$ 1,500	$ (14,400)

OTHER ASSETS (Servicing Assets

OTHER ASSETS (Servicing Assets Rollforward) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Servicing Asset at Amortized Value, Balance [Roll Forward]
MSRs	$ 153,114		$ 150,343
Residential MSRs
Servicing Asset at Amortized Value, Balance [Roll Forward]
Fair value at beginning of period	146,589	$ 147,233
Mortgage servicing assets recognized	5,730	3,592
Principal reductions	(4,321)	(5,726)
Change in fair value due to valuation assumptions	1,457	(14,356)
Fair value at end of period	149,455	$ 130,743
MSRs	$ 153,100		$ 150,300

DEPOSITS AND OTHER CUSTOMER A81

DEPOSITS AND OTHER CUSTOMER ACCOUNTS (Summary of Deposits and Other Customer Accounts) (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Balance
Interest-bearing demand deposits	$ 11,474,772	$ 11,284,881
Non-interest-bearing demand deposits	15,608,348	15,413,609
Savings	6,090,884	5,988,852
Customer repurchase accounts	819,783	868,544
Money market	24,977,919	24,511,906
Certificates of deposit (CDs)	7,629,528	9,172,898
Total Deposits	66,601,234	67,240,690
Foreign deposits	$ 10,300,000	$ 10,700,000
Percent of total deposits
Interest-bearing demand deposits (as a percent)	17.30%	16.80%
Non-interest-bearing demand deposits (as a percent)	23.40%	22.90%
Savings (as a percent)	9.10%	8.90%
Customer repurchase accounts (as a percent)	1.20%	1.30%
Money market (as a percent)	37.50%	36.50%
Certificates of deposit (CDs) (as a percent)	11.50%	13.60%
Total Deposits (as a percent)	100.00%	100.00%

DEPOSITS AND OTHER CUSTOMER A82

DEPOSITS AND OTHER CUSTOMER ACCOUNTS (Narrative) (Details) - USD ($) $ in Millions	Mar. 31, 2017	Dec. 31, 2016
Financial Instruments Owned and Pledged as Collateral [Line Items]
Securities pledged as collateral, fair value	$ 7,100	$ 7,200
Demand deposit overdrafts that have been reclassified as loan balances	55.8	61.1
Public fund deposits
Financial Instruments Owned and Pledged as Collateral [Line Items]
Securities pledged as collateral, fair value	$ 2,900	$ 3,000

BORROWINGS (Narrative) (Details

BORROWINGS (Narrative) (Details) - USD ($)		Apr. 13, 2017	Mar. 31, 2017	Mar. 31, 2016	Mar. 27, 2017	Dec. 31, 2016
Debt Instrument [Line Items]
Total borrowings and other debt obligations	[1]		$ 41,475,698,000			$ 43,524,445,000
Loss on debt extinguishment			6,749,000	$ 32,872,000
FHLB convertible rate | Santander Bank
Debt Instrument [Line Items]
Outstanding letters of credit			700,000,000
Senior Notes
Debt Instrument [Line Items]
Debt repurchased				$ 0
Senior Notes | 2.00% Senior Notes due 2018
Debt Instrument [Line Items]
Debt repurchased			$ 881,000,000
Stated interest rate			2.00%
Loss on debt extinguishment			$ 6,700,000
Senior Notes | 3.70% Senior Notes due May 2022
Debt Instrument [Line Items]
Stated interest rate					3.70%
Aggregate principal amount					$ 1,000,000,000
Senior Notes | Senior floating rates due July 2019 | Subsequent Event
Debt Instrument [Line Items]
Aggregate principal amount		$ 388,700,000
Basis spread on LIBOR (as a percent)		1.00%
[1]	The Company has interests in certain securitization trusts ("Trusts") that are considered variable interest entities ("VIEs") for accounting purposes. The Company consolidates VIEs where it is deemed the primary beneficiary. See Note 6 to these Condensed Consolidated Financial Statements for additional information.

BORROWINGS (Parent Company and

BORROWINGS (Parent Company and Other IHC Entities) (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2017	Dec. 31, 2016
Debt Instrument [Line Items]
Total borrowings and other debt obligations	[1]	$ 41,475,698	$ 43,524,445
Parent Company and Other IHC Entities
Debt Instrument [Line Items]
Total borrowings and other debt obligations		$ 5,674,268	$ 4,737,976
Effective Rate		3.36%	3.21%
Parent Company and Other IHC Entities | Senior notes, due November 2017
Debt Instrument [Line Items]
Senior notes, Balance		$ 599,392	$ 599,206
Effective Rate		2.59%	2.67%
Parent Company and Other IHC Entities | Senior notes, due November 2017 | 3-month LIBOR
Debt Instrument [Line Items]
Basis spread on LIBOR (as a percent)		1.45%
Parent Company and Other IHC Entities | 3.45% senior notes, due August 2018
Debt Instrument [Line Items]
Senior notes, Balance		$ 498,809	$ 498,604
Effective Rate		3.62%	3.62%
Stated interest rate		3.45%
Parent Company and Other IHC Entities | 2.70% senior notes, due May 2019
Debt Instrument [Line Items]
Senior notes, Balance		$ 997,489	$ 997,207
Effective Rate		2.82%	2.82%
Stated interest rate		2.70%
Parent Company and Other IHC Entities | 2.65% senior notes, due April 2020
Debt Instrument [Line Items]
Senior notes, Balance		$ 995,060	$ 994,672
Effective Rate		2.82%	2.82%
Stated interest rate		2.65%
Parent Company and Other IHC Entities | 3.70% senior notes, due March 2022
Debt Instrument [Line Items]
Senior notes, Balance		$ 994,651	$ 0
Effective Rate		3.82%	0.00%
Stated interest rate		3.70%
Parent Company and Other IHC Entities | 4.50% senior notes, due July 2025
Debt Instrument [Line Items]
Senior notes, Balance		$ 1,095,077	$ 1,094,955
Effective Rate		4.57%	4.56%
Stated interest rate		4.50%
Parent Company and Other IHC Entities | Junior subordinated debentures - Capital Trust VI, due June 2036
Debt Instrument [Line Items]
Subordinated debentures, Balance		$ 69,804	$ 69,798
Effective Rate		7.91%	7.91%
Parent Company and Other IHC Entities | Common securities - Capital Trust VI
Debt Instrument [Line Items]
Common securities, Balance		$ 10,000	$ 10,000
Effective Rate		7.91%	7.91%
Parent Company and Other IHC Entities | Junior subordinated debentures - Capital Trust IX, due July 2036
Debt Instrument [Line Items]
Subordinated debentures, Balance		$ 149,440	$ 149,434
Effective Rate		2.84%	2.49%
Parent Company and Other IHC Entities | Common securities - Capital Trust IX
Debt Instrument [Line Items]
Common securities, Balance		$ 4,640	$ 4,640
Effective Rate		2.84%	2.49%
Parent Company and Other IHC Entities | Overnight funds purchase, due April 2017
Debt Instrument [Line Items]
Short-term borrowings, Balance		$ 770	$ 830
Effective Rate		0.81%	0.50%
Parent Company and Other IHC Entities | 2.00% subordinated debt, maturing through 2042
Debt Instrument [Line Items]
Subordinated debentures, Balance		$ 40,498	$ 40,457
Effective Rate		2.00%	2.00%
Stated interest rate		2.00%
Parent Company and Other IHC Entities | Short-term borrowings, due April 2017
Debt Instrument [Line Items]
Short-term borrowings, Balance		$ 91,000	$ 54,000
Effective Rate		0.88%	0.63%
Parent Company and Other IHC Entities | Overnight borrowings, maturing April 2017
Debt Instrument [Line Items]
Short-term borrowings, Balance		$ 31,000	$ 17,000
Effective Rate		0.88%	0.63%
Parent Company and Other IHC Entities | Short-term borrowings, maturing in less than one year
Debt Instrument [Line Items]
Short-term borrowings, Balance		$ 93,378	$ 207,173
Effective Rate		0.25%	0.25%
Parent Company and Other IHC Entities | Short-term borrowings, maturing in less than one year | Subsidiaries
Debt Instrument [Line Items]
Short-term borrowings, Balance		$ 3,260	$ 0
Effective Rate		0.35%	0.00%
[1]	The Company has interests in certain securitization trusts ("Trusts") that are considered variable interest entities ("VIEs") for accounting purposes. The Company consolidates VIEs where it is deemed the primary beneficiary. See Note 6 to these Condensed Consolidated Financial Statements for additional information.

BORROWINGS (Santander Bank) (De

BORROWINGS (Santander Bank) (Details) - Santander Bank - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Dec. 31, 2016
Debt Instrument [Line Items]
Total borrowings and other debt obligations	$ 5,270,318	$ 7,754,702
Effective Rate	2.44%	1.92%
2.00% senior notes, due January 2018
Debt Instrument [Line Items]
Senior notes, Balance	$ 76,908	$ 748,143
Effective Rate	2.24%	2.24%
Stated interest rate	2.00%
Senior Notes, due January 2018
Debt Instrument [Line Items]
Senior notes, Balance	$ 41,877	$ 249,705
Effective Rate	1.95%	1.99%
Senior Notes, due January 2018 | 3-month LIBOR
Debt Instrument [Line Items]
Basis spread on LIBOR (as a percent)	0.93%
8.750% subordinated debentures, due May 2018
Debt Instrument [Line Items]
Subordinated debentures, Balance	$ 499,069	$ 498,882
Effective Rate	8.92%	8.92%
Stated interest rate	8.75%
Subordinated term loan, due February 2019
Debt Instrument [Line Items]
Subordinated term loan, Balance	$ 116,326	$ 122,313
Effective Rate	7.01%	6.78%
FHLB advances, maturing through July 2019
Debt Instrument [Line Items]
FHLB advances, Balance	$ 4,350,000	$ 5,950,000
Effective Rate	1.15%	0.85%
Real estate investment trust preferred, due May 2020
Debt Instrument [Line Items]
Real estate investment trust preferred, due May 2020, Balance	$ 156,842	$ 156,457
Effective Rate	13.36%	13.46%
Subordinated term loan, due August 2022
Debt Instrument [Line Items]
Subordinated term loan, Balance	$ 29,296	$ 29,202
Effective Rate	8.77%	8.35%

BORROWINGS (SC) (Details)

BORROWINGS (SC) (Details) - USD ($)	3 Months Ended	12 Months Ended
	Mar. 31, 2017	Dec. 31, 2016
Debt Instrument [Line Items]
Balance	$ 112,300,000	$ 114,400,000
SC
Debt Instrument [Line Items]
Balance	46,404,153,000	46,472,073,000
Restricted Cash Pledged	$ 2,274,237,000	$ 1,924,467,000
SC | Minimum
Debt Instrument [Line Items]
Effective Rate	0.88%	0.88%
SC | Maximum
Debt Instrument [Line Items]
Effective Rate	2.86%	2.86%
SC | Line of credit, due December 2018
Debt Instrument [Line Items]
Committed Amount	$ 750,000,000
SC | Line of credit, due December 2018 | Minimum | LIBOR
Debt Instrument [Line Items]
Basis spread on LIBOR (as a percent)	0.60%
SC | Line of credit, due December 2018 | Maximum | LIBOR
Debt Instrument [Line Items]
Basis spread on LIBOR (as a percent)	0.90%
SC | Revolving Credit Facility
Debt Instrument [Line Items]
Balance	$ 6,858,638,000	$ 9,414,817,000
Committed Amount	$ 13,670,501,000	$ 13,393,309,000
Effective Rate	2.78%	2.36%
Assets Pledged	$ 6,159,818,000	$ 8,606,745,000
Restricted Cash Pledged	$ 177,552,000	$ 188,730,000
SC | Revolving Credit Facility | Maximum
Debt Instrument [Line Items]
Facility rolling maturity period	1 year	1 year
SC | Revolving Credit Facility | Warehouse line, maturing on various dates
Debt Instrument [Line Items]
Balance	$ 232,045,000	$ 462,085,000
Committed Amount	$ 1,250,000,000	$ 1,250,000,000
Effective Rate	3.73%	2.52%
Assets Pledged	$ 326,912,000	$ 653,014,000
Restricted Cash Pledged	11,207,000	14,916,000
SC | Revolving Credit Facility | Warehouse line, due August 2018
Debt Instrument [Line Items]
Balance	216,520,000	534,220,000
Committed Amount	$ 780,000,000	$ 780,000,000
Effective Rate	3.30%	1.98%
Assets Pledged	$ 281,270,000	$ 608,025,000
Restricted Cash Pledged	6,946,000	24,520,000
SC | Revolving Credit Facility | Warehouse line, due August 2018
Debt Instrument [Line Items]
Balance	2,018,143,000	3,119,943,000
Committed Amount	$ 3,120,000,000	$ 3,120,000,000
Effective Rate	2.29%	1.91%
Assets Pledged	$ 3,067,595,000	$ 4,700,774,000
Restricted Cash Pledged	64,912,000	70,991,000
SC | Revolving Credit Facility | Warehouse line, due October 2018
Debt Instrument [Line Items]
Balance	435,477,000	702,377,000
Committed Amount	$ 1,800,000,000	$ 1,800,000,000
Effective Rate	3.31%	2.51%
Assets Pledged	$ 620,916,000	$ 994,684,000
Restricted Cash Pledged	10,000,000	23,378,000
SC | Revolving Credit Facility | Warehouse line, due October 2018
Debt Instrument [Line Items]
Balance	132,365,000	202,000,000
Committed Amount	$ 400,000,000	$ 400,000,000
Effective Rate	2.91%	2.22%
Assets Pledged	$ 189,416,000	$ 290,867,000
Restricted Cash Pledged	2,671,000	5,435,000
SC | Revolving Credit Facility | Warehouse line, due January 2018
Debt Instrument [Line Items]
Balance	168,084,000	153,784,000
Committed Amount	$ 500,000,000	$ 500,000,000
Effective Rate	2.84%	3.17%
Assets Pledged	$ 213,200,000	$ 213,578,000
Restricted Cash Pledged	0	0
SC | Revolving Credit Facility | Warehouse line, due November 2018
Debt Instrument [Line Items]
Balance	301,199,000	578,999,000
Committed Amount	$ 1,000,000,000	$ 1,000,000,000
Effective Rate	2.51%	1.56%
Assets Pledged	$ 451,750,000	$ 850,758,000
Restricted Cash Pledged	7,902,000	17,642,000
SC | Revolving Credit Facility | Warehouse line, due November 2018
Debt Instrument [Line Items]
Balance	174,720,000	0
Committed Amount	$ 500,000,000	$ 500,000,000
Effective Rate	2.16%	2.07%
Assets Pledged	$ 186,481,000	$ 0
Restricted Cash Pledged	4,722,000	0
SC | Revolving Credit Facility | Warehouse line, due October 2017
Debt Instrument [Line Items]
Balance	273,800,000	243,100,000
Committed Amount	$ 300,000,000	$ 300,000,000
Effective Rate	2.44%	2.38%
Assets Pledged	$ 322,183,000	$ 295,045,000
Restricted Cash Pledged	10,803,000	9,235,000
SC | Revolving Credit Facility | Warehouse line, due July 2018
Debt Instrument [Line Items]
Balance	235,784,000
Committed Amount	$ 250,000,000
Effective Rate	3.25%
Assets Pledged	$ 500,095,000
Restricted Cash Pledged	44,377,000
SC | Revolving Credit Facility | Repurchase facility, due December 2017
Debt Instrument [Line Items]
Balance	328,608,000	507,800,000
Committed Amount	$ 328,608,000	$ 507,800,000
Effective Rate	3.32%	2.83%
Assets Pledged	$ 0	$ 0
Restricted Cash Pledged	14,012,000	22,613,000
SC | Revolving Credit Facility | Repurchase facility, due April 2017
Debt Instrument [Line Items]
Balance	235,509,000	235,509,000
Committed Amount	$ 235,509,000	$ 235,509,000
Effective Rate	2.04%	2.04%
Assets Pledged	$ 0	$ 0
Restricted Cash Pledged	0	0
SC | Revolving Credit Facility | Repurchase facility, due March 2018
Debt Instrument [Line Items]
Balance	147,182,000
Committed Amount	$ 147,182,000
Effective Rate	3.31%
Assets Pledged	$ 0
Restricted Cash Pledged	0
SC | Revolving Credit Facility | Repurchase facility, due April 2017
Debt Instrument [Line Items]
Balance	59,202,000
Committed Amount	$ 59,202,000
Effective Rate	2.09%
Assets Pledged	$ 0
Restricted Cash Pledged	0
SC | Revolving Credit Facility | Line of credit with related party, due December 2017
Debt Instrument [Line Items]
Balance	500,000,000	1,000,000,000
Committed Amount	$ 500,000,000	$ 1,000,000,000
Effective Rate	3.24%	2.86%
Assets Pledged	$ 0	$ 0
Restricted Cash Pledged	0	0
SC | Revolving Credit Facility | Line of credit with related party, due December 2017
Debt Instrument [Line Items]
Balance	1,000,000,000	500,000,000
Committed Amount	$ 1,000,000,000	$ 500,000,000
Effective Rate	2.83%	3.04%
Assets Pledged	$ 0	$ 0
Restricted Cash Pledged	0	0
SC | Revolving Credit Facility | Line of credit with related party, due December 2018
Debt Instrument [Line Items]
Balance	0	175,000,000
Committed Amount	$ 500,000,000	$ 500,000,000
Effective Rate	3.89%	3.87%
Assets Pledged	$ 0	$ 0
Restricted Cash Pledged	0	0
SC | Revolving Credit Facility | Line of credit with related party, due December 2018
Debt Instrument [Line Items]
Balance	400,000,000	1,000,000,000
Committed Amount	$ 1,000,000,000	$ 1,000,000,000
Effective Rate	3.36%	2.88%
Assets Pledged	$ 0	$ 0
Restricted Cash Pledged	0	0
SC | Revolving Credit Facility | Line of credit with related party
Debt Instrument [Line Items]
Unsecured debt	$ 1,600,000,000	$ 1,300,000,000

BORROWINGS (Secured Structured

BORROWINGS (Secured Structured Financings) (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Debt Instrument [Line Items]
Initial Note Amounts Issued	$ 112,300	$ 114,400
SC
Debt Instrument [Line Items]
Balance	23,672,474	21,616,950
Initial Note Amounts Issued	46,404,153	46,472,073
Collateral	31,979,198	29,496,411
Restricted Cash	$ 2,274,237	$ 1,924,467
SC | Minimum
Debt Instrument [Line Items]
Initial Weighted Average Interest Rate Range	0.88%	0.88%
SC | Maximum
Debt Instrument [Line Items]
Initial Weighted Average Interest Rate Range	2.86%	2.86%
SC | SC public securitizations, maturing on various dates
Debt Instrument [Line Items]
Balance	$ 14,797,166	$ 13,444,543
Initial Note Amounts Issued	33,958,912	32,386,082
Collateral	19,098,090	17,474,524
Restricted Cash	$ 1,641,484	$ 1,423,599
SC | SC public securitizations, maturing on various dates | Minimum
Debt Instrument [Line Items]
Initial Weighted Average Interest Rate Range	0.89%	0.89%
SC | SC public securitizations, maturing on various dates | Maximum
Debt Instrument [Line Items]
Initial Weighted Average Interest Rate Range	2.80%	2.46%
SC | SC privately issued amortizing notes, maturing on various dates
Debt Instrument [Line Items]
Balance	$ 8,875,308	$ 8,172,407
Initial Note Amounts Issued	12,445,241	14,085,991
Collateral	12,881,108	12,021,887
Restricted Cash	$ 632,753	$ 500,868
SC | SC privately issued amortizing notes, maturing on various dates | Minimum
Debt Instrument [Line Items]
Initial Weighted Average Interest Rate Range	0.88%	0.88%
SC | SC privately issued amortizing notes, maturing on various dates | Maximum
Debt Instrument [Line Items]
Initial Weighted Average Interest Rate Range	2.86%	2.86%

DERIVATIVES (Narrative) (Detail

DERIVATIVES (Narrative) (Details) - USD ($)	3 Months Ended
	Mar. 31, 2017	Dec. 31, 2016
Credit Risk Contingent Features
Fair value of derivatives with credit risk contingent feature associated with credit ratings	$ 4,600,000
Additional collateral required	0
Fair value of derivatives with credit risk contingent features	21,500,000	$ 27,000,000
Collateral posted	24,000,000	$ 28,300,000
Cash Flow Hedges
Cash flow hedge loss to be reclassified within next twelve months	$ 700,000

DERIVATIVES (Derivatives Design

DERIVATIVES (Derivatives Designated in Hedge Relationships) (Details) - Designated as hedging instrument - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2017	Dec. 31, 2016
Derivative [Line Items]
Notional Amount	$ 10,859,091	$ 10,124,172
Asset, Total	57,802	45,681
Liability, Total	$ 66,495	$ 59,812
Weighted Average Receive Rate	1.15%	0.91%
Weighted Average Pay Rate	1.03%	1.03%
Weighted Average
Derivative [Line Items]
Weighted Average Life (Years)	2 years 325 days	3 years 3 days
Cash flow hedges | Pay fixed — receive floating interest rate swaps
Derivative [Line Items]
Notional Amount	$ 7,309,091	$ 10,124,172
Asset, Cash flow hedges	57,063	45,681
Liability, Cash flow hedges	$ 4,593	$ 59,812
Weighted Average Receive Rate	1.04%	0.91%
Weighted Average Pay Rate	1.17%	1.03%
Cash flow hedges | Pay fixed — receive floating interest rate swaps | Weighted Average
Derivative [Line Items]
Weighted Average Life (Years)	2 years 165 days	3 years 3 days
Cash flow hedges | Pay variable receive — fixed floating interest rate swaps
Derivative [Line Items]
Notional Amount	$ 3,550,000
Asset, Cash flow hedges	739
Liability, Cash flow hedges	$ 61,902
Weighted Average Receive Rate	1.38%
Weighted Average Pay Rate	0.74%
Cash flow hedges | Pay variable receive — fixed floating interest rate swaps | Weighted Average
Derivative [Line Items]
Weighted Average Life (Years)	3 years 293 days

DERIVATIVES (Other Derivatives)

DERIVATIVES (Other Derivatives) (Details) - Not designated as hedging instrument - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Derivative Instruments Not Designated as Hedging Instruments [Abstract]
Notional	$ 49,153,342	$ 47,594,597
Asset derivatives Fair value	357,016	375,649
Liability derivatives Fair value	326,466	323,326
Other
Derivative Instruments Not Designated as Hedging Instruments [Abstract]
Notional	1,303,915	1,265,583
Asset derivatives Fair value	13,520	12,293
Liability derivatives Fair value	18,956	16,325
Foreign exchange contracts
Derivative Instruments Not Designated as Hedging Instruments [Abstract]
Notional	3,425,931	3,366,483
Asset derivatives Fair value	29,157	56,742
Liability derivatives Fair value	29,967	46,430
Interest rate swap agreements
Derivative Instruments Not Designated as Hedging Instruments [Abstract]
Notional	841,952	1,064,289
Asset derivatives Fair value	3,285	2,075
Liability derivatives Fair value	2,235	2,647
Interest rate cap agreements
Derivative Instruments Not Designated as Hedging Instruments [Abstract]
Notional	10,718,110	9,491,468
Asset derivatives Fair value	104,748	76,387
Liability derivatives Fair value	0	0
Options for interest rate cap agreements
Derivative Instruments Not Designated as Hedging Instruments [Abstract]
Notional	10,690,797	9,463,935
Asset derivatives Fair value	0	0
Liability derivatives Fair value	104,692	76,281
Total return settlement
Derivative Instruments Not Designated as Hedging Instruments [Abstract]
Notional	658,471	658,471
Asset derivatives Fair value	0	0
Liability derivatives Fair value	31,123	30,618
Mortgage banking derivatives
Derivative Instruments Not Designated as Hedging Instruments [Abstract]
Notional	922,308	1,241,705
Asset derivatives Fair value	5,600	11,731
Liability derivatives Fair value	3,952	1,635
Mortgage banking derivatives | Forward commitments to sell loans
Derivative Instruments Not Designated as Hedging Instruments [Abstract]
Notional	422,087	693,137
Asset derivatives Fair value	2	8,577
Liability derivatives Fair value	2,365	0
Mortgage banking derivatives | Interest rate lock commitments
Derivative Instruments Not Designated as Hedging Instruments [Abstract]
Notional	205,221	253,568
Asset derivatives Fair value	4,310	2,316
Liability derivatives Fair value	0	0
Mortgage banking derivatives | Mortgage servicing
Derivative Instruments Not Designated as Hedging Instruments [Abstract]
Notional	295,000	295,000
Asset derivatives Fair value	1,288	838
Liability derivatives Fair value	1,587	1,635
Customer related derivatives
Derivative Instruments Not Designated as Hedging Instruments [Abstract]
Notional	20,591,858	21,042,663
Asset derivatives Fair value	200,706	216,421
Liability derivatives Fair value	135,541	149,390
Customer related derivatives | Swaps receive fixed
Derivative Instruments Not Designated as Hedging Instruments [Abstract]
Notional	9,430,945	9,646,151
Asset derivatives Fair value	101,579	127,123
Liability derivatives Fair value	56,929	49,642
Customer related derivatives | Swaps pay fixed
Derivative Instruments Not Designated as Hedging Instruments [Abstract]
Notional	9,609,742	9,785,170
Asset derivatives Fair value	95,293	85,877
Liability derivatives Fair value	76,232	97,759
Customer related derivatives | Other
Derivative Instruments Not Designated as Hedging Instruments [Abstract]
Notional	1,551,171	1,611,342
Asset derivatives Fair value	3,834	3,421
Liability derivatives Fair value	$ 2,380	$ 1,989

DERIVATIVES (Income Statement E

DERIVATIVES (Income Statement Effect) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Cross-currency swaps | Miscellaneous income | Fair value hedges
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized on all derivatives	$ 0	$ 174
Interest rate swaps | Miscellaneous income | Fair value hedges
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized on all derivatives	0	(4,484)
Pay fixed-receive variable interest rate swaps | Net interest income | Cash flow hedges
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized on all derivatives	(2,387)	(2,663)
Pay variable receive-fixed interest rate swap | Net interest income | Cash flow hedges
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized on all derivatives	(2,781)	0
Forward commitments to sell loans | Mortgage banking income
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized on all derivatives	(10,940)	(3,895)
Interest rate lock commitments | Mortgage banking income
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized on all derivatives	1,994	4,452
Mortgage servicing | Mortgage banking income
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized on all derivatives	497	15,070
Customer related derivatives | Miscellaneous income
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized on all derivatives	(1,887)	1,594
Foreign exchange | Miscellaneous income
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized on all derivatives	2,260	2,063
Interest rate swaps, caps, and options | Miscellaneous income
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized on all derivatives	1,204	(5,499)
Interest rate swaps, caps, and options | Net interest income
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized on all derivatives	4,730	15,139
Total return settlement | Other administrative expenses
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized on all derivatives	(505)	(1,316)
Other | Miscellaneous income
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized on all derivatives	$ (1,501)	$ (1,131)

DERIVATIVES (Offsetting of Fina

DERIVATIVES (Offsetting of Financial Assets) (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Offsetting Assets [Line Items]
Gross Amounts of Recognized Assets, Total derivatives subject to a master netting arrangement or similar arrangement	$ 410,508	$ 419,733
Gross Amounts Offset in the Condensed Consolidated Balance Sheet, Total Derivative Assets	7,250	7,551
Net Amounts of Assets Presented in the Condensed Consolidated Balance Sheet, Total derivatives subject to a master netting arrangement or similar arrangement	403,258	412,182
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheet - Financial Instruments, Total Derivative Assets	5,005	4,484
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheet - Cash Collateral Received, Total Derivative Assets	40,777	61,164
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheet - Net Amount, Total derivatives subject to a master netting arrangement or similar arrangement	357,476	346,534
Total derivatives not subject to a master netting arrangement or similar arrangement	4,310	1,597
Gross Amounts of Recognized Assets, Total Derivative Assets	414,818	421,330
Net Amounts of Assets Presented in the Condensed Consolidated Balance Sheet, Total Derivative Assets	407,568	413,779
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheet - Net Amount, Total Derivative Assets	361,786	348,131
Other derivative activities
Offsetting Assets [Line Items]
Gross Amounts of Recognized Assets, Total derivatives subject to a master netting arrangement or similar arrangement	352,706	374,052
Gross Amounts Offset in the Condensed Consolidated Balance Sheet, Total Derivative Assets	7,250	7,551
Net Amounts of Assets Presented in the Condensed Consolidated Balance Sheet, Total derivatives subject to a master netting arrangement or similar arrangement	345,456	366,501
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheet - Financial Instruments, Total Derivative Assets	5,005	4,484
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheet - Cash Collateral Received, Total Derivative Assets	31,262	39,474
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheet - Net Amount, Total derivatives subject to a master netting arrangement or similar arrangement	309,189	322,543
Cash flow hedges
Offsetting Assets [Line Items]
Gross Amounts of Recognized Assets, Total derivatives subject to a master netting arrangement or similar arrangement	57,802	45,681
Gross Amounts Offset in the Condensed Consolidated Balance Sheet, Total Derivative Assets	0	0
Net Amounts of Assets Presented in the Condensed Consolidated Balance Sheet, Total derivatives subject to a master netting arrangement or similar arrangement	57,802	45,681
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheet - Financial Instruments, Total Derivative Assets	0	0
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheet - Cash Collateral Received, Total Derivative Assets	9,515	21,690
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheet - Net Amount, Total derivatives subject to a master netting arrangement or similar arrangement	$ 48,287	$ 23,991

DERIVATIVES (Offsetting of Fi93

DERIVATIVES (Offsetting of Financial Liabilities) (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Offsetting Liabilities [Line Items]
Gross Amounts of Recognized Liabilities, Total derivatives subject to a master netting arrangement or similar arrangement	$ 361,838	$ 352,520
Gross Amounts Offset in the Condensed Consolidated Balance Sheet	33,399	34,197
Net Amounts of Liabilities Presented in the Condensed Consolidated Balance Sheet, Total derivatives subject to a master netting arrangement or similar arrangement	328,439	318,323
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheet, Cash Collateral Pledged, Total Derivative Liabilities	225,658	205,994
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheet, Net Amount, Total derivatives subject to a master netting arrangement or similar arrangement	102,781	112,329
Total derivatives not subject to a master netting arrangement or similar arrangement	31,123	30,618
Gross Amounts of Recognized Liabilities, Total Derivative Liabilities	392,961	383,138
Net Amounts of Liabilities Presented in the Condensed Consolidated Balance Sheet, Total Derivative Liabilities	359,562	348,941
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheet, Net Amount, Total Derivatives Liabilities	133,904	142,947
Other derivative activities
Offsetting Liabilities [Line Items]
Gross Amounts of Recognized Liabilities, Total derivatives subject to a master netting arrangement or similar arrangement	295,343	292,708
Gross Amounts Offset in the Condensed Consolidated Balance Sheet	33,399	34,197
Net Amounts of Liabilities Presented in the Condensed Consolidated Balance Sheet, Total derivatives subject to a master netting arrangement or similar arrangement	261,944	258,511
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheet, Cash Collateral Pledged, Total Derivative Liabilities	105,553	95,138
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheet, Net Amount, Total derivatives subject to a master netting arrangement or similar arrangement	156,391	163,373
Cash flow hedges
Offsetting Liabilities [Line Items]
Gross Amounts of Recognized Liabilities, Total derivatives subject to a master netting arrangement or similar arrangement	66,495	59,812
Gross Amounts Offset in the Condensed Consolidated Balance Sheet	0	0
Net Amounts of Liabilities Presented in the Condensed Consolidated Balance Sheet, Total derivatives subject to a master netting arrangement or similar arrangement	66,495	59,812
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheet, Cash Collateral Pledged, Total Derivative Liabilities	120,105	110,856
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheet, Net Amount, Total derivatives subject to a master netting arrangement or similar arrangement	$ (53,610)	$ (51,044)

INCOME TAXES (Details)

INCOME TAXES (Details) $ in Thousands	Dec. 15, 2016USD ($)	Mar. 31, 2017USD ($)	Mar. 31, 2016USD ($)	Dec. 31, 2009USD ($)transaction	Dec. 31, 2007USD ($)	Dec. 31, 2016USD ($)
Income Tax Disclosure [Abstract]
Income tax provision		$ 78,937	$ 78,860
Effective tax rate		32.50%	41.80%
Discrete income tax provision (benefit)		$ (7,400)	$ 5,700
Number of financing transactions related to lawsuit | transaction				2
Transaction amount related to lawsuit seeking refund of taxes paid				$ 1,200,000
Income Tax Contingency [Line Items]
Foreign taxes paid					$ 264,000
Disallowed interest expense and transaction costs deductions				74,600
Penalties and interest expense				$ 92,500
Tax reserve						$ 36,000
Reasonably possible decrease in reserve for uncertain tax positions						36,000
Reasonably possible increase in reserve for uncertain tax positions						0
Settled Litigation
Income Tax Contingency [Line Items]
Tax reserve						$ 230,100
Settled Litigation | U.K.
Income Tax Contingency [Line Items]
Foreign taxes paid	$ 132,000

ACCUMULATED OTHER COMPREHENSI95

ACCUMULATED OTHER COMPREHENSIVE INCOME / (LOSS) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total other comprehensive income/(loss), pretax activity	$ 31,951	$ 178,914
Total other comprehensive income/(loss), tax effect	(12,984)	(65,348)
TOTAL OTHER COMPREHENSIVE INCOME, NET OF TAX	18,967	113,566
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Equity, Beginning balance	22,378,758	21,847,100
Net Activity	18,967	113,566
Equity, Ending balance	22,599,750	21,981,141
Net unrealized gains/(losses) on cash flow hedge derivative financial instruments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income/(loss), pretax activity	(2,828)	(64,196)
Other comprehensive income/(loss), tax effect	(1,269)	30,260
Other comprehensive income/(loss), net activity	(4,097)	(33,936)
Reclassification adjustment, pretax activity	2,387	2,663
Reclassification adjustment, tax effect	(777)	(1,255)
Reclassification adjustment, net activity	1,610	1,408
Total other comprehensive income/(loss), pretax activity	(441)	(61,533)
Total other comprehensive income/(loss), tax effect	(2,046)	29,005
TOTAL OTHER COMPREHENSIVE INCOME, NET OF TAX	(2,487)	(32,528)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Equity, Beginning balance	(6,725)	(16,581)
Net Activity	(2,487)	(32,528)
Equity, Ending balance	(9,212)	(49,109)
Net unrealized (losses)/gains on investment securities available-for-sale
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income/(loss), pretax activity	31,479	265,939
Other comprehensive income/(loss), tax effect	(10,510)	(104,372)
Other comprehensive income/(loss), net activity	20,969	161,567
Reclassification adjustment, pretax activity		(26,421)
Reclassification adjustment, tax effect		10,383
Reclassification adjustment, net activity		(16,038)
Total other comprehensive income/(loss), pretax activity	31,479	239,518
Total other comprehensive income/(loss), tax effect	(10,510)	(93,989)
TOTAL OTHER COMPREHENSIVE INCOME, NET OF TAX	20,969	145,529
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Equity, Beginning balance	(130,754)	(95,942)
Net Activity	20,969	145,529
Equity, Ending balance	(109,785)	49,587
Reclassification adjustment for net (gains)/losses included in net income/(expense) on non-OTTI securities
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification adjustment, pretax activity	0	(26,431)
Reclassification adjustment, tax effect	0	10,387
Reclassification adjustment, net activity	0	(16,044)
Reclassification adjustment for net losses/(gains) included in net income/(expense) on OTTI securities
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification adjustment, pretax activity	0	10
Reclassification adjustment, tax effect	0	(4)
Reclassification adjustment, net activity	0	6
Pension and post-retirement actuarial gains/(losses)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total other comprehensive income/(loss), pretax activity	913	929
Total other comprehensive income/(loss), tax effect	(428)	(364)
TOTAL OTHER COMPREHENSIVE INCOME, NET OF TAX	485	565
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Equity, Beginning balance	(55,729)	(58,007)
Net Activity	485	565
Equity, Ending balance	(55,244)	(57,442)
Accumulated other comprehensive (loss)/income
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Equity, Beginning balance	(193,208)	(170,530)
Equity, Ending balance	$ (174,241)	$ (56,964)

COMMITMENTS, CONTINGENCIES AN96

COMMITMENTS, CONTINGENCIES AND GUARANTEES (Other Commitments) (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Other Commitments [Line Items]
Lines of credit outstanding	$ 112,300	$ 114,400
Total commitments	30,243,673	31,110,538
Commitments to extend credit
Other Commitments [Line Items]
Other commitments	28,240,161	28,889,904
Unsecured revolving lines of credit
Other Commitments [Line Items]
Lines of credit outstanding	30,116	30,547
Letters of credit
Other Commitments [Line Items]
Other commitments	1,849,205	2,071,089
Letters of credit	1,849,205	2,071,089
Recourse exposure on sold loans
Other Commitments [Line Items]
Other commitments	68,564	69,877
Commitments to sell loans
Other Commitments [Line Items]
Other commitments	$ 55,627	$ 49,121

COMMITMENTS, CONTINGENCIES AN97

COMMITMENTS, CONTINGENCIES AND GUARANTEES (Commitments to Extend Credit) (Details) - Commitments to extend credit - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Dec. 31, 2016
Other Commitments [Line Items]
Commitments that can be canceled without notice	$ 6,000,000	$ 6,300,000
Commitments to extend credit expiring per period:
1 year or less	5,867,806	5,656,552
Over 1 year to 3 years	5,191,572	5,265,685
Over 3 years to 5 years	4,053,421	4,680,057
Over 5 years	13,127,362	13,287,610
Total	$ 28,240,161	$ 28,889,904
Commitment period	5 years

COMMITMENTS, CONTINGENCIES AN98

COMMITMENTS, CONTINGENCIES AND GUARANTEES (Letters of Credit) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Dec. 31, 2016	Mar. 31, 2016	Dec. 31, 2015
Other Commitments [Line Items]
Reserve for unfunded lending commitments	$ 120,396	$ 122,419	$ 173,568	$ 149,021
Lines of credit outstanding	$ 112,300	114,400
Letters of credit
Other Commitments [Line Items]
Commitments, weighted average term	1 year 2 months 21 days
Reserve for unfunded lending commitments	$ 8,100	8,100
Letters of credit expiring per period:
1 year or less	1,158,238	1,360,495
Over 1 year to 3 years	595,918	399,866
Over 3 years to 5 years	67,439	283,975
Over 5 years	27,610	26,753
Total	$ 1,849,205	$ 2,071,089

COMMITMENTS, CONTINGENCIES AN99

COMMITMENTS, CONTINGENCIES AND GUARANTEES (Loans Sold with Recourse and Commitments to Sell Loans) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Dec. 31, 2016	Mar. 31, 2016
Recourse exposure on sold loans
Other Commitments [Line Items]
Retained credit risk, multifamily servicing	$ 3.5		$ 3.8
Recourse exposure on sold loans | FNMA | Multifamily loans
Other Commitments [Line Items]
Loans sold with recourse, unpaid principal balance	$ 288.2	$ 341.7
Loans sold with recourse, portion of first credit loss position retained, percent	100.00%
Value of underlying collateral	$ 34.4	$ 34.4
Commitments to sell loans
Other Commitments [Line Items]
Forward contracts maturity period (less than)	1 year

COMMITMENTS, CONTINGENCIES A100

COMMITMENTS, CONTINGENCIES AND GUARANTEES (SC Commitments) (Details) - USD ($)	Mar. 31, 2017	Nov. 13, 2015	Mar. 31, 2017	Dec. 31, 2015	Dec. 31, 2016	Jul. 27, 2016	Aug. 01, 2015	Jul. 31, 2015	Jun. 29, 2015
Long-term Purchase Commitment [Line Items]
Outstanding balance	$ 85,817,859,000		$ 85,817,859,000		$ 88,406,093,000
Forward commitments to sell loans
Long-term Purchase Commitment [Line Items]
Payment obligation	55,627,000		55,627,000		49,121,000
SC
Long-term Purchase Commitment [Line Items]
Loans subject of a demand to repurchase	$ 0		0
Servicer payments period	6 years
Minimum sales commitment, charged off loan receivables	$ 200,000,000	$ 350,000,000	200,000,000						$ 275,000,000
Threshold for sales subject to market price check (over)		$ 275,000,000
Minimum sales commitment, loans receivable, written off, remaining	152,100,000		152,100,000		166,200,000
SC | Separation Agreement | Chief Executive Officer
Long-term Purchase Commitment [Line Items]
Compensation liability	115,100,000		115,100,000
SC | Chrysler
Long-term Purchase Commitment [Line Items]
Financing dedicated to FCA retail financing	4,500,000,000		$ 4,500,000,000
Commitment to meet escalating penetration rates, period			5 years
SC | Maximum
Long-term Purchase Commitment [Line Items]
Total commitments						$ 300,000,000
Purchase commitment, repurchase rate (up to) (as a percent)				9.99%
Purchase commitment, exercise of repurchase rights, retainer rate (up to) (as a percent)				20.00%
SC | Maximum | CBP
Long-term Purchase Commitment [Line Items]
Loss-sharing payment percentage			0.50%
SC | Minimum | Chrysler
Long-term Purchase Commitment [Line Items]
Funding available for dealer inventory financing	5,000,000,000		$ 5,000,000,000
SC | Forward commitments to sell loans | Obligation to repurchase receivables sold
Long-term Purchase Commitment [Line Items]
Total commitments	11,300,000		11,300,000		12,600,000
SC | Revenue sharing payments and gain-sharing payments to FCA | Chrysler
Long-term Purchase Commitment [Line Items]
Payment obligation	9,200,000		9,200,000		10,100,000
SC | Servicer performance payment
Long-term Purchase Commitment [Line Items]
Payment obligation	10,800,000		10,800,000		9,800,000
SC | Loan purchase commitments | Maximum | CBP
Long-term Purchase Commitment [Line Items]
Loan purchase commitment amount (lesser of)							$ 200,000,000	$ 600,000,000
SC | Loan purchase commitments | Minimum | CBP
Long-term Purchase Commitment [Line Items]
Loan purchase commitment amount (lesser of)							$ 50,000,000	$ 250,000,000
SC | Consumer | Unfunded Loan Commitment | Receivables from Dealers
Long-term Purchase Commitment [Line Items]
Outstanding balance	3,700,000		3,700,000		2,500,000
Committed amount	$ 3,700,000		$ 3,700,000		$ 2,900,000

COMMITMENTS, CONTINGENCIES A101

COMMITMENTS, CONTINGENCIES AND GUARANTEES (Legal and Other Regulatory and Governmental Proceedings) (Details)	Mar. 29, 2017USD ($)	Sep. 12, 2016USD ($)	Jul. 14, 2016USD ($)	Nov. 04, 2015USD ($)	Mar. 26, 2015USD ($)	Feb. 25, 2015USD ($)	Mar. 31, 2017USD ($)claim	Dec. 31, 2016USD ($)
Loss Contingencies [Line Items]
Accrued legal and regulatory liabilities							$ 87,800,000	$ 98,800,000
Pending gain (loss) related to litigation settlement							$ (5,200,000)
Identity Theft Protection Product Matter
Loss Contingencies [Line Items]
Identity theft protection payments returned to customers					$ 6,000,000			$ 37,300,000
Overdraft Coverage Consent Order
Loss Contingencies [Line Items]
Remediation payment			$ 10,000,000
Violation of Applicable State Consumer Protection Laws in Massachusetts | SC
Loss Contingencies [Line Items]
Amount agreed to be paid	$ 5,800,000
Violation of Applicable State Consumer Protection Laws in Massachusetts | SC | Independent Trust
Loss Contingencies [Line Items]
Amount agreed to be paid	16,300,000
Violation of Applicable State Consumer Protection Laws in Delaware | SC
Loss Contingencies [Line Items]
Amount agreed to be paid	1,000,000
Violation of Applicable State Consumer Protection Laws in Delaware | SC | Independent Trust
Loss Contingencies [Line Items]
Amount agreed to be paid	$ 2,900,000
Assurance of Discontinuance | SC | Unfavorable Regulatory Action
Loss Contingencies [Line Items]
Damages sought, value				$ 150,000
Violation of Service Members Civil Relief Act | SC
Loss Contingencies [Line Items]
SCRA compliance period						5 years
Violation of Service Members Civil Relief Act | SC | Civil Fine
Loss Contingencies [Line Items]
Damages sought, value						$ 55,000
Violation of Service Members Civil Relief Act | SC | Civil Fine to Affected Service Members | Minimum
Loss Contingencies [Line Items]
Damages sought, value						9,400,000
Violation of Service Members Civil Relief Act | SC | Lost Equity for Each Repossession
Loss Contingencies [Line Items]
Damages sought, value						10,000
Violation of Service Members Civil Relief Act | SC | Sought to Collect Repossession-related Fees
Loss Contingencies [Line Items]
Damages sought, value						$ 5,000
Puerto Rico FINRA Arbitrations
Loss Contingencies [Line Items]
Number of FINRA arbitration cases | claim							199
Number of claims that remain pending | claim							131
Puerto Rico Closed-End Funds Shareholder Derivative and Class Action | Minimum
Loss Contingencies [Line Items]
Damages sought, value		$ 10,000,000

RELATED PARTY TRANSACTIONS (Det

RELATED PARTY TRANSACTIONS (Details) - USD ($)	Apr. 17, 2017	Mar. 28, 2017	Jul. 02, 2015	Jul. 16, 2014	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016	Aug. 31, 2016
Related Party Transaction [Line Items]
Capital contribution from shareholder					$ 9,000,000	$ 0
Santander
Related Party Transaction [Line Items]
Capital contribution from shareholder		$ 9,000,000
SC | Revolving Credit Facility
Related Party Transaction [Line Items]
Loan amount					13,670,501,000		$ 13,393,309,000
SC | DDFS LLC
Related Party Transaction [Line Items]
Equity method investment, ownership percentage			9.70%
SC | Chief Executive Officer | Modified Stock Option
Related Party Transaction [Line Items]
Share-based compensation, contingent liability					115,100,000
SC | Loan Agreement | DDFS LLC
Related Party Transaction [Line Items]
Common stock pledged as collateral (in shares)				29,598,506
SC | Loan Agreement | DDFS LLC | Line of Credit | Revolving Credit Facility
Related Party Transaction [Line Items]
Loan amount				$ 300,000,000
Debt, principal balance					290,000,000		$ 290,000,000
SC | Santander
Related Party Transaction [Line Items]
Sale of loans securitized					700,000,000
Loss from sale of securitized loans					2,700,000
Due to related parties					37,500,000
SC | Affiliated Entity | Call Transaction | DDFS LLC
Related Party Transaction [Line Items]
Number of shares called by warrant			34,598,506
Proceeds payable upon consummation					$ 905,400,000
SC | Affiliated Entity | Call Transaction | DDFS LLC | LIBOR
Related Party Transaction [Line Items]
Call transaction, basis spread on variable rate (as a percent)				1.00%
SC | Affiliated Entity | Amended and Restated Loan Agreement | DDFS LLC
Related Party Transaction [Line Items]
Minimum pledged collateral to outstanding principal requirement, percentage				150.00%
Minimum pledged collateral to outstanding principal requirement default, repayment of outstanding principal, percentage				200.00%
SC | Affiliated Entity | Amended and Restated Loan Agreement | DDFS LLC | Base Rate | Subsequent Event
Related Party Transaction [Line Items]
Basis spread on LIBOR (as a percent)	2.00%
SC | Affiliated Entity | Amended and Restated Loan Agreement | DDFS LLC | Federal Funds Rate | Subsequent Event
Related Party Transaction [Line Items]
Basis spread on LIBOR (as a percent)	0.50%
SC | Affiliated Entity | Shareholders Agreement | DDFS LLC
Related Party Transaction [Line Items]
Call Transaction, average share price (in usd per share)			$ 26.83					$ 26.17
Number of consecutive trading days			10 days

FAIR VALUE (General) (Details)

FAIR VALUE (General) (Details) - Recurring - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets	$ 19,383,885	$ 18,253,630
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets	172,142	225,264
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets	18,282,049	16,847,722
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets	$ 929,694	$ 1,180,644
Percentage of level 3 assets to total assets held at fair value	4.80%
Percentage of level 3 assets to total assets	0.70%

FAIR VALUE (Fair Value Measurem

FAIR VALUE (Fair Value Measurements, Recurring) (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016	Mar. 31, 2016	Dec. 31, 2015
Financial assets:
Available-for-sale investment securities	$ 18,366,328	$ 17,024,225
Trading securities	19,386	1,630
RICs held-for-investment	202,500	217,200
Derivatives	407,568	413,779
Total MSRs	153,114	150,343
Financial liabilities:
Derivatives	359,562	348,941
Residential MSRs
Financial assets:
MSRs	149,455	146,589	$ 130,743	$ 147,233
Total MSRs	153,100	150,300
U.S. Treasury securities
Financial assets:
Available-for-sale investment securities	2,303,245	1,856,857
Corporate debt
Financial assets:
Available-for-sale investment securities	210,906
ABS
Financial assets:
Available-for-sale investment securities	753,475	1,210,724
Equity securities
Financial assets:
Available-for-sale investment securities	11,217	11,151
State and municipal securities
Financial assets:
Available-for-sale investment securities	28	30
Recurring
Financial assets:
Available-for-sale investment securities	18,355,674	17,013,618
Trading securities	19,386	1,630
RICs held-for-investment	202,473	217,170
LHFS	242,079	453,293
MSRs	149,455	146,589
Total financial assets	19,383,885	18,253,630
Financial liabilities:
Total financial liabilities	392,961	383,138
Recurring | Mortgage banking interest rate lock commitments
Financial assets:
Derivatives	4,310	2,316
Recurring | Mortgage banking forward sell commitments
Financial assets:
Derivatives	2	8,577
Financial liabilities:
Derivatives	2,365
Recurring | Customer related
Financial assets:
Derivatives	200,706	216,421
Financial liabilities:
Derivatives	135,541	149,390
Recurring | Foreign exchange
Financial assets:
Derivatives	29,157	56,742
Financial liabilities:
Derivatives	29,967	46,430
Recurring | Mortgage servicing
Financial assets:
Derivatives	1,288	838
Financial liabilities:
Derivatives	1,587	1,635
Recurring | Interest rate swaps
Financial assets:
Derivatives	3,285	2,075
Financial liabilities:
Derivatives	2,235	2,647
Recurring | Interest rate cap agreements
Financial assets:
Derivatives	104,748	76,387
Recurring | Option for interest rate cap
Financial liabilities:
Derivatives	104,692	76,281
Recurring | Total return settlement
Financial liabilities:
Derivatives	31,123	30,618
Recurring | Other
Financial assets:
Derivatives	13,520	12,293
Financial liabilities:
Derivatives	18,956	16,325
Recurring | Cash flow
Financial assets:
Derivatives	57,802	45,681
Financial liabilities:
Derivatives	66,495	59,812
Recurring | U.S. Treasury securities
Financial assets:
Available-for-sale investment securities	2,303,245	1,856,857
Recurring | Corporate debt
Financial assets:
Available-for-sale investment securities	210,906
Recurring | ABS
Financial assets:
Available-for-sale investment securities	753,475	1,210,724
Recurring | Equity securities
Financial assets:
Available-for-sale investment securities	563	544
Equity securities excluded in accordance with adoption of ASU 2015-07	10,700	10,600
Recurring | State and municipal securities
Financial assets:
Available-for-sale investment securities	28	30
Recurring | MBS
Financial assets:
Available-for-sale investment securities	15,087,457	13,945,463
Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1)
Financial assets:
Available-for-sale investment securities	170,166	225,050
Trading securities	1,976	214
RICs held-for-investment	0	0
LHFS	0	0
MSRs	0	0
Total financial assets	172,142	225,264
Financial liabilities:
Total financial liabilities	0	0
Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Mortgage banking interest rate lock commitments
Financial assets:
Derivatives	0	0
Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Mortgage banking forward sell commitments
Financial assets:
Derivatives	0	0
Financial liabilities:
Derivatives	0
Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Customer related
Financial assets:
Derivatives	0	0
Financial liabilities:
Derivatives	0	0
Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Foreign exchange
Financial assets:
Derivatives	0	0
Financial liabilities:
Derivatives	0	0
Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Mortgage servicing
Financial assets:
Derivatives	0	0
Financial liabilities:
Derivatives	0	0
Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Interest rate swaps
Financial assets:
Derivatives	0	0
Financial liabilities:
Derivatives	0	0
Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Interest rate cap agreements
Financial assets:
Derivatives	0	0
Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Option for interest rate cap
Financial liabilities:
Derivatives	0	0
Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Total return settlement
Financial liabilities:
Derivatives	0	0
Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Other
Financial assets:
Derivatives	0	0
Financial liabilities:
Derivatives	0	0
Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Cash flow
Financial assets:
Derivatives	0	0
Financial liabilities:
Derivatives	0	0
Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | U.S. Treasury securities
Financial assets:
Available-for-sale investment securities	169,603	224,506
Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Corporate debt
Financial assets:
Available-for-sale investment securities	0
Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | ABS
Financial assets:
Available-for-sale investment securities	0	0
Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Equity securities
Financial assets:
Available-for-sale investment securities	563	544
Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | State and municipal securities
Financial assets:
Available-for-sale investment securities	0	0
Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | MBS
Financial assets:
Available-for-sale investment securities	0	0
Recurring | Significant Other Observable Inputs (Level 2)
Financial assets:
Available-for-sale investment securities	17,612,054	15,974,001
Trading securities	17,410	1,416
RICs held-for-investment	0	0
LHFS	242,079	453,293
MSRs	0	0
Total financial assets	18,282,049	16,847,722
Financial liabilities:
Total financial liabilities	360,940	351,820
Recurring | Significant Other Observable Inputs (Level 2) | Mortgage banking interest rate lock commitments
Financial assets:
Derivatives	0	0
Recurring | Significant Other Observable Inputs (Level 2) | Mortgage banking forward sell commitments
Financial assets:
Derivatives	0	8,575
Financial liabilities:
Derivatives	2,365
Recurring | Significant Other Observable Inputs (Level 2) | Customer related
Financial assets:
Derivatives	200,706	216,421
Financial liabilities:
Derivatives	135,541	149,390
Recurring | Significant Other Observable Inputs (Level 2) | Foreign exchange
Financial assets:
Derivatives	29,157	56,742
Financial liabilities:
Derivatives	29,967	46,430
Recurring | Significant Other Observable Inputs (Level 2) | Mortgage servicing
Financial assets:
Derivatives	1,288	838
Financial liabilities:
Derivatives	1,587	1,635
Recurring | Significant Other Observable Inputs (Level 2) | Interest rate swaps
Financial assets:
Derivatives	3,285	2,075
Financial liabilities:
Derivatives	2,235	2,647
Recurring | Significant Other Observable Inputs (Level 2) | Interest rate cap agreements
Financial assets:
Derivatives	104,748	76,387
Recurring | Significant Other Observable Inputs (Level 2) | Option for interest rate cap
Financial liabilities:
Derivatives	104,692	76,281
Recurring | Significant Other Observable Inputs (Level 2) | Total return settlement
Financial liabilities:
Derivatives	0	0
Recurring | Significant Other Observable Inputs (Level 2) | Other
Financial assets:
Derivatives	13,520	12,293
Financial liabilities:
Derivatives	18,058	15,625
Recurring | Significant Other Observable Inputs (Level 2) | Cash flow
Financial assets:
Derivatives	57,802	45,681
Financial liabilities:
Derivatives	66,495	59,812
Recurring | Significant Other Observable Inputs (Level 2) | U.S. Treasury securities
Financial assets:
Available-for-sale investment securities	2,133,642	1,632,351
Recurring | Significant Other Observable Inputs (Level 2) | Corporate debt
Financial assets:
Available-for-sale investment securities	210,906
Recurring | Significant Other Observable Inputs (Level 2) | ABS
Financial assets:
Available-for-sale investment securities	180,021	396,157
Recurring | Significant Other Observable Inputs (Level 2) | Equity securities
Financial assets:
Available-for-sale investment securities	0	0
Recurring | Significant Other Observable Inputs (Level 2) | State and municipal securities
Financial assets:
Available-for-sale investment securities	28	30
Recurring | Significant Other Observable Inputs (Level 2) | MBS
Financial assets:
Available-for-sale investment securities	15,087,457	13,945,463
Recurring | Significant Unobservable Inputs (Level 3)
Financial assets:
Available-for-sale investment securities	573,454	814,567
Trading securities	0	0
RICs held-for-investment	202,473	217,170
LHFS	0	0
MSRs	149,455	146,589
Total financial assets	929,694	1,180,644
Financial liabilities:
Total financial liabilities	32,021	31,318
Recurring | Significant Unobservable Inputs (Level 3) | Mortgage banking interest rate lock commitments
Financial assets:
Derivatives	4,310	2,316
Recurring | Significant Unobservable Inputs (Level 3) | Mortgage banking forward sell commitments
Financial assets:
Derivatives	2	2
Financial liabilities:
Derivatives	0
Recurring | Significant Unobservable Inputs (Level 3) | Customer related
Financial assets:
Derivatives	0	0
Financial liabilities:
Derivatives	0	0
Recurring | Significant Unobservable Inputs (Level 3) | Foreign exchange
Financial assets:
Derivatives	0	0
Financial liabilities:
Derivatives	0	0
Recurring | Significant Unobservable Inputs (Level 3) | Mortgage servicing
Financial assets:
Derivatives	0	0
Financial liabilities:
Derivatives	0	0
Recurring | Significant Unobservable Inputs (Level 3) | Interest rate swaps
Financial assets:
Derivatives	0	0
Financial liabilities:
Derivatives	0	0
Recurring | Significant Unobservable Inputs (Level 3) | Interest rate cap agreements
Financial assets:
Derivatives	0	0
Recurring | Significant Unobservable Inputs (Level 3) | Option for interest rate cap
Financial liabilities:
Derivatives	0	0
Recurring | Significant Unobservable Inputs (Level 3) | Total return settlement
Financial liabilities:
Derivatives	31,123	30,618
Recurring | Significant Unobservable Inputs (Level 3) | Other
Financial assets:
Derivatives	0	0
Financial liabilities:
Derivatives	898	700
Recurring | Significant Unobservable Inputs (Level 3) | Cash flow
Financial assets:
Derivatives	0	0
Financial liabilities:
Derivatives	0	0
Recurring | Significant Unobservable Inputs (Level 3) | U.S. Treasury securities
Financial assets:
Available-for-sale investment securities	0	0
Recurring | Significant Unobservable Inputs (Level 3) | Corporate debt
Financial assets:
Available-for-sale investment securities	0
Recurring | Significant Unobservable Inputs (Level 3) | ABS
Financial assets:
Available-for-sale investment securities	573,454	814,567
Recurring | Significant Unobservable Inputs (Level 3) | Equity securities
Financial assets:
Available-for-sale investment securities	0	0
Recurring | Significant Unobservable Inputs (Level 3) | State and municipal securities
Financial assets:
Available-for-sale investment securities	0	0
Recurring | Significant Unobservable Inputs (Level 3) | MBS
Financial assets:
Available-for-sale investment securities	$ 0	$ 0

FAIR VALUE (Fair Value Measu105

FAIR VALUE (Fair Value Measurements, Non-recurring) (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	$ 202,500	$ 217,200
Total carrying value of the loans	6,646,140	6,392,653
Nonrecurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreclosed assets	90,453	110,513
Vehicle inventory	315,035	257,659
LHFS	1,861,021	2,133,040
MSRs	8,918	10,287
Nonrecurring | Impaired LHFI
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	437,898	523,797
Total carrying value of the loans	395,600	449,500
Nonrecurring | Auto loans impaired due to bankruptcy
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	54,929
Nonrecurring | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreclosed assets	0	0
Vehicle inventory	0	0
LHFS	0	0
MSRs	0	0
Nonrecurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Impaired LHFI
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	11,436	13,147
Nonrecurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Auto loans impaired due to bankruptcy
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	0
Nonrecurring | Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreclosed assets	9,055	30,792
Vehicle inventory	315,035	257,659
LHFS	0	0
MSRs	0	0
Nonrecurring | Significant Other Observable Inputs (Level 2) | Impaired LHFI
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	140,279	244,986
Nonrecurring | Significant Other Observable Inputs (Level 2) | Auto loans impaired due to bankruptcy
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	54,929
Nonrecurring | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreclosed assets	81,398	79,721
Vehicle inventory	0	0
LHFS	1,861,021	2,133,040
MSRs	8,918	10,287
Nonrecurring | Significant Unobservable Inputs (Level 3) | Impaired LHFI
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	286,183	$ 265,664
Nonrecurring | Significant Unobservable Inputs (Level 3) | Auto loans impaired due to bankruptcy
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	$ 0

FAIR VALUE (Fair Value Adjustme

FAIR VALUE (Fair Value Adjustments) (Details) - Nonrecurring - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value adjustment	$ (137,140)	$ (158,886)
Impaired loans held-for-investment | Provision for credit losses
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value adjustment	(45,772)	(91,860)
Foreclosed assets | Miscellaneous income
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value adjustment	(1,742)	(2,994)
Loans held for sale | Miscellaneous income
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value adjustment	(66,121)	(64,213)
Auto loans impaired due to bankruptcy | Provision for credit losses
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value adjustment	(23,600)	0
Mortgage servicing rights | Mortgage banking income, net
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value adjustment	$ 95	$ 181

FAIR VALUE (Reconciliation of A

FAIR VALUE (Reconciliation of Assets and Liabilities Using Level 3 Inputs) (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2017USD ($)factor	Mar. 31, 2016USD ($)	Jan. 28, 2014USD ($)
Fair Value, Assets, Unobservable Input Reconciliation [Roll Forward]
Number of primary factors driving gains | factor	3
RICs Held for Investment
Fair Value, Assets, Unobservable Input Reconciliation [Roll Forward]
Unpaid principal balance on previously charged-off RIC portfolio			$ 3,000,000
Level 3 | Recurring
Fair Value, Assets, Unobservable Input Reconciliation [Roll Forward]
Balance at beginning of period	$ 1,149,326	$ 1,791,620
Gains/(losses) in other comprehensive income	(619)	1,585
Gains/(losses) in earnings	19,542	16,713
Additions/Issuances	19,061	282,277
Settlements	(289,637)	(78,278)
Balance at ending of period	897,673	2,013,917
Changes in unrealized gains (losses) included in earnings related to balances still held at end of period	17,548	12,261
Level 3 | Recurring | Investments Available-for-Sale
Fair Value, Assets, Unobservable Input Reconciliation [Roll Forward]
Balance at beginning of period	814,567	1,360,240
Gains/(losses) in other comprehensive income	(619)	1,585
Gains/(losses) in earnings	0	0
Additions/Issuances	0	278,686
Settlements	(240,494)	(88)
Balance at ending of period	573,454	1,640,423
Changes in unrealized gains (losses) included in earnings related to balances still held at end of period	0	0
Level 3 | Recurring | RICs Held for Investment
Fair Value, Assets, Unobservable Input Reconciliation [Roll Forward]
Balance at beginning of period	217,170	335,425
Gains/(losses) in other comprehensive income	0	0
Gains/(losses) in earnings	16,891	28,042
Additions/Issuances	13,331	0
Settlements	(44,919)	(73,517)
Balance at ending of period	202,473	289,950
Changes in unrealized gains (losses) included in earnings related to balances still held at end of period	16,891	28,042
Level 3 | Recurring | MSRs
Fair Value, Assets, Unobservable Input Reconciliation [Roll Forward]
Balance at beginning of period	146,589	147,233
Gains/(losses) in other comprehensive income	0	0
Gains/(losses) in earnings	1,457	(14,356)
Additions/Issuances	5,730	3,591
Settlements	(4,321)	(5,726)
Balance at ending of period	149,455	130,742
Changes in unrealized gains (losses) included in earnings related to balances still held at end of period	1,457	(14,356)
Level 3 | Recurring | Derivatives
Fair Value, Assets, Unobservable Input Reconciliation [Roll Forward]
Balance at beginning of period	(29,000)	(51,278)
Gains/(losses) in other comprehensive income	0	0
Gains/(losses) in earnings	1,194	3,027
Additions/Issuances	0	0
Settlements	97	1,053
Balance at ending of period	(27,709)	(47,198)
Changes in unrealized gains (losses) included in earnings related to balances still held at end of period	$ (800)	$ (1,425)

FAIR VALUE (Sensitivity Analysi

FAIR VALUE (Sensitivity Analysis of Fair Value, Mortgage Servicing Rights) (Details) - MSRs $ in Millions	Mar. 31, 2017USD ($)
Sensitivity Analysis of Fair Value of Interests Continued to be Held by Transferor, Servicing Assets or Liabilities, Impact of Adverse Change in Assumption [Line Items]
Sensitivity analysis of fair value, impact of 10 percent adverse change in prepayment speed	$ 5.1
Sensitivity analysis of fair value, impact of 20 percent adverse change in prepayment speed	9.8
Sensitivity analysis of fair value, impact of 10 percent adverse change in discount rate	5.1
Sensitivity analysis of fair value, impact of 20 percent adverse change in discount rate	$ 9.8

FAIR VALUE (Quantitative Inform

FAIR VALUE (Quantitative Information) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Dec. 31, 2016
Financial Assets:
Available-for-sale at fair value	$ 18,366,328	$ 17,024,225
RICs held-for-investment	202,500	217,200
Derivatives	407,568	413,779
Financial Liabilities:
Derivative liability	359,562	348,941
Recurring
Financial Assets:
Available-for-sale at fair value	18,355,674	17,013,618
RICs held-for-investment	202,473	217,170
MSRs	149,455	146,589
Recurring | Mortgage banking interest rate lock commitments
Financial Assets:
Derivatives	4,310	2,316
Recurring | Total return settlement
Financial Liabilities:
Derivative liability	31,123	30,618
Recurring | Level 3
Financial Assets:
Available-for-sale at fair value	573,454	814,567
RICs held-for-investment	202,473	217,170
MSRs	149,455	146,589
Recurring | Level 3 | Mortgage banking interest rate lock commitments
Financial Assets:
Derivatives	4,310	2,316
Recurring | Level 3 | Mortgage banking interest rate lock commitments | Discounted Cash Flow
Financial Assets:
Derivatives	$ 4,310
Unobservable Inputs
Pull through percentage	79.92%
Recurring | Level 3 | Mortgage banking interest rate lock commitments | Discounted Cash Flow | Minimum
Unobservable Inputs
MSR value	0.73%
Recurring | Level 3 | Mortgage banking interest rate lock commitments | Discounted Cash Flow | Maximum
Unobservable Inputs
MSR value	1.03%
Recurring | Level 3 | Mortgage banking interest rate lock commitments | Discounted Cash Flow | Weighted Average
Unobservable Inputs
MSR value	0.96%
Recurring | Level 3 | Total return settlement
Financial Liabilities:
Derivative liability	$ 31,123	$ 30,618
Recurring | Level 3 | Total return settlement | Discounted Cash Flow
Financial Liabilities:
Derivative liability	$ 31,123
Unobservable Inputs
Discount Rate	6.40%
Recurring | Level 3 | Financing bonds | Discounted Cash Flow
Financial Assets:
Available-for-sale at fair value	$ 524,096
Recurring | Level 3 | Financing bonds | Discounted Cash Flow | Minimum
Unobservable Inputs
Discount Rate	1.44%
Recurring | Level 3 | Financing bonds | Discounted Cash Flow | Maximum
Unobservable Inputs
Discount Rate	2.60%
Recurring | Level 3 | Financing bonds | Discounted Cash Flow | Weighted Average
Unobservable Inputs
Discount Rate	1.92%
Recurring | Level 3 | Sale-leaseback securities | Consensus Pricing
Financial Assets:
Available-for-sale at fair value	$ 49,358
Unobservable Inputs
Offered quotes	125.69%
Recurring | Level 3 | RICs held-for-investment | Discounted Cash Flow
Financial Assets:
RICs held-for-investment	$ 202,473
Unobservable Inputs
Prepayment rate (CPR)	6.66%
Recurring | Level 3 | RICs held-for-investment | Discounted Cash Flow | Minimum
Unobservable Inputs
Discount Rate	9.50%
Recovery Rate	25.00%
Recurring | Level 3 | RICs held-for-investment | Discounted Cash Flow | Maximum
Unobservable Inputs
Discount Rate	14.50%
Recovery Rate	43.00%
Recurring | Level 3 | RICs held-for-investment | Discounted Cash Flow | Weighted Average
Unobservable Inputs
Discount Rate	9.91%
Recovery Rate	28.83%
Recurring | Level 3 | MSRs | Discounted Cash Flow
Financial Assets:
MSRs	$ 149,455
Unobservable Inputs
Discount Rate	9.90%
Recurring | Level 3 | MSRs | Discounted Cash Flow | Minimum
Unobservable Inputs
Prepayment rate (CPR)	0.03%
Recurring | Level 3 | MSRs | Discounted Cash Flow | Maximum
Unobservable Inputs
Prepayment rate (CPR)	53.47%
Recurring | Level 3 | MSRs | Discounted Cash Flow | Weighted Average
Unobservable Inputs
Prepayment rate (CPR)	9.48%

FAIR VALUE (Fair Value of Finan

FAIR VALUE (Fair Value of Financial Instruments) (Details) - USD ($) $ in Thousands		Mar. 31, 2017	Dec. 31, 2016
Fair Value Disclosures [Abstract]
Restricted cash	[1]	$ 3,283,356	$ 3,016,948
Financial assets:
Available-for-sale investment securities		18,366,328	17,024,225
Held to maturity investment securities		1,594,256	1,635,413
Trading securities		19,386	1,630
LHFI, net		79,792,037	82,005,321
Derivatives		407,568	413,779
Financial liabilities:
Derivatives		359,562	348,941
Equity securities
Financial assets:
Available-for-sale investment securities		11,217	11,151
Recurring
Financial assets:
Available-for-sale investment securities		18,355,674	17,013,618
Trading securities		19,386	1,630
LHFS		242,079	453,293
MSRs		149,455	146,589
Recurring | Equity securities
Financial assets:
Available-for-sale investment securities		563	544
Equity securities excluded in accordance with adoption of ASU 2015-07		10,700	10,600
Level 1 | Recurring
Financial assets:
Available-for-sale investment securities		170,166	225,050
Trading securities		1,976	214
LHFS		0	0
MSRs		0	0
Level 1 | Recurring | Equity securities
Financial assets:
Available-for-sale investment securities		563	544
Level 2 | Recurring
Financial assets:
Available-for-sale investment securities		17,612,054	15,974,001
Trading securities		17,410	1,416
LHFS		242,079	453,293
MSRs		0	0
Level 2 | Recurring | Equity securities
Financial assets:
Available-for-sale investment securities		0	0
Level 3 | Recurring
Financial assets:
Available-for-sale investment securities		573,454	814,567
Trading securities		0	0
LHFS		0	0
MSRs		149,455	146,589
Level 3 | Recurring | Equity securities
Financial assets:
Available-for-sale investment securities		0	0
Carrying Value
Financial assets:
Cash and amounts due from depository institutions		8,570,489	10,035,859
Available-for-sale investment securities		18,355,674	17,013,618
Held to maturity investment securities		1,621,221	1,658,644
Trading securities		19,386	1,630
LHFI, net		79,792,037	82,005,321
LHFS		2,102,959	2,586,308
Restricted cash		3,283,356	3,016,948
MSRs		153,114	150,343
Derivatives		414,818	421,330
Financial liabilities:
Deposits		66,601,234	67,240,690
Borrowings and other debt obligations		41,475,698	43,524,445
Derivatives		392,961	383,138
Fair Value
Financial assets:
Cash and amounts due from depository institutions		8,570,489	10,035,859
Available-for-sale investment securities		18,355,674	17,013,618
Held to maturity investment securities		1,594,256	1,635,413
Trading securities		19,386	1,630
LHFI, net		80,584,109	81,955,122
LHFS		2,103,100	2,586,333
Restricted cash		3,283,356	3,016,948
MSRs		158,373	156,876
Derivatives		414,818	421,330
Financial liabilities:
Deposits		66,501,812	67,141,041
Borrowings and other debt obligations		41,811,036	43,770,267
Derivatives		392,961	383,138
Fair Value | Level 1
Financial assets:
Cash and amounts due from depository institutions		8,570,489	10,035,859
Available-for-sale investment securities		170,166	225,050
Held to maturity investment securities		0	0
Trading securities		1,976	214
LHFI, net		11,436	13,147
LHFS		0	0
Restricted cash		3,283,356	3,016,948
MSRs		0	0
Derivatives		0	0
Financial liabilities:
Deposits		58,971,706	58,067,792
Borrowings and other debt obligations		770	830
Derivatives		0	0
Fair Value | Level 2
Financial assets:
Cash and amounts due from depository institutions		0	0
Available-for-sale investment securities		17,612,054	15,974,001
Held to maturity investment securities		1,594,256	1,635,413
Trading securities		17,410	1,416
LHFI, net		140,279	244,986
LHFS		242,079	453,293
Restricted cash		0	0
MSRs		0	0
Derivatives		410,506	419,012
Financial liabilities:
Deposits		7,530,106	9,073,249
Borrowings and other debt obligations		26,023,543	26,132,197
Derivatives		360,940	351,820
Fair Value | Level 3
Financial assets:
Cash and amounts due from depository institutions		0	0
Available-for-sale investment securities		573,454	814,567
Held to maturity investment securities		0	0
Trading securities		0	0
LHFI, net		80,432,394	81,696,989
LHFS		1,861,021	2,133,040
Restricted cash		0	0
MSRs		158,373	156,876
Derivatives		4,312	2,318
Financial liabilities:
Deposits		0	0
Borrowings and other debt obligations		15,786,723	17,637,240
Derivatives		$ 32,021	$ 31,318
[1]	The Company has interests in certain securitization trusts ("Trusts") that are considered variable interest entities ("VIEs") for accounting purposes. The Company consolidates VIEs where it is deemed the primary beneficiary. See Note 6 to these Condensed Consolidated Financial Statements for additional information.

FAIR VALUE (Fair Value Option f

FAIR VALUE (Fair Value Option for Financial Assets and Liabilities) (Details) - USD ($) $ in Thousands	Jan. 28, 2014	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016	Dec. 31, 2015
Residential mortgages
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
MSRs		$ 149,455	$ 130,743	$ 146,589	$ 147,233
Change in fair value due to valuation assumptions		$ 1,500	$ (14,400)
LHFS
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Threshold period for discontinuing and reversing accrual of interest (more than)		90 days
Fair Value
LHFS		$ 242,079
Aggregate Unpaid Principal Balance
LHFS		238,014
Difference
LHFS		4,065
RICs held-for-investment
Fair Value
RICs held-for-investment		202,473
Nonaccrual loans		20,075
Aggregate Unpaid Principal Balance
RICs held-for-investment		255,463
Nonaccrual loans		28,426
Difference
RICs held-for-investment		(52,990)
Nonaccrual loans		$ (8,351)
SC | RICs held-for-investment
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Threshold period for discontinuing and reversing accrual of interest (more than)	60 days	60 days
Fair Value
RICs held-for-investment	$ 1,900,000
Aggregate Unpaid Principal Balance
RICs held-for-investment	$ 2,600,000

BUSINESS SEGMENT INFORMATION (N

BUSINESS SEGMENT INFORMATION (Narrative) (Details) - USD ($)	May 01, 2013	Mar. 31, 2017
FCA
Segment Reporting Information [Line Items]
Private label financing agreement, term	10 years
GCB
Segment Reporting Information [Line Items]
Minimum annual revenue to service corporations		$ 500,000,000

BUSINESS SEGMENT INFORMATION (S

BUSINESS SEGMENT INFORMATION (Segment Information) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Segment Reporting Information [Line Items]
Net interest income	$ 1,602,565	$ 1,695,803
Total non-interest income	728,418	697,177
Provision for credit losses	735,445	898,462
Total expenses	1,352,892	1,305,975
INCOME BEFORE INCOME TAX PROVISION	242,646	188,543
Intersegment revenue/(expense)	0	0
Total assets	135,109,476	145,220,888	$ 137,370,523
Operating Segments | Consumer & Business Banking
Segment Reporting Information [Line Items]
Net interest income	303,448	222,561
Total non-interest income	84,998	97,986
Provision for credit losses	22,451	501
Total expenses	385,309	380,488
INCOME BEFORE INCOME TAX PROVISION	(19,314)	(60,442)
Intersegment revenue/(expense)	3,349	12,702
Total assets	19,279,101	19,791,765
Operating Segments | Commercial Banking
Segment Reporting Information [Line Items]
Net interest income	85,320	77,144
Total non-interest income	13,366	16,554
Provision for credit losses	6,003	61,656
Total expenses	54,247	52,124
INCOME BEFORE INCOME TAX PROVISION	38,436	(20,082)
Intersegment revenue/(expense)	1,172	4,604
Total assets	11,457,211	11,729,869
Operating Segments | Commercial Real Estate
Segment Reporting Information [Line Items]
Net interest income	69,496	64,757
Total non-interest income	2,245	4,940
Provision for credit losses	(617)	12,680
Total expenses	21,995	22,323
INCOME BEFORE INCOME TAX PROVISION	50,363	34,694
Intersegment revenue/(expense)	817	3,378
Total assets	14,397,413	15,552,072
Operating Segments | GCB
Segment Reporting Information [Line Items]
Net interest income	42,906	60,317
Total non-interest income	11,670	20,982
Provision for credit losses	(1,364)	47,795
Total expenses	23,468	38,200
INCOME BEFORE INCOME TAX PROVISION	32,472	(4,696)
Intersegment revenue/(expense)	(2,175)	(16)
Total assets	8,077,848	12,555,445
Operating Segments | Other
Segment Reporting Information [Line Items]
Net interest income	12,824	54,212
Total non-interest income	187,621	200,979
Provision for credit losses	15,610	13,497
Total expenses	240,983	283,387
INCOME BEFORE INCOME TAX PROVISION	(56,148)	(41,693)
Intersegment revenue/(expense)	(3,163)	(20,668)
Total assets	42,835,963	47,822,778
Operating Segments | SC
Segment Reporting Information [Line Items]
Net interest income	1,042,925	1,163,578
Total non-interest income	434,848	353,191
Provision for credit losses	635,013	660,170
Total expenses	621,334	527,657
INCOME BEFORE INCOME TAX PROVISION	221,426	328,942
Intersegment revenue/(expense)	0	0
Total assets	39,061,940	37,768,959
SC Purchase Price Adjustments | SC
Segment Reporting Information [Line Items]
Net interest income	37,305	51,773
Total non-interest income	5,454	13,782
Provision for credit losses	58,349	102,163
Total expenses	11,872	14,733
INCOME BEFORE INCOME TAX PROVISION	(27,462)	(51,341)
Intersegment revenue/(expense)	0	0
Total assets	0	0
Eliminations
Segment Reporting Information [Line Items]
Net interest income	8,341	1,461
Total non-interest income	(11,784)	(11,237)
Provision for credit losses	0	0
Total expenses	(6,316)	(12,937)
INCOME BEFORE INCOME TAX PROVISION	2,873	3,161
Intersegment revenue/(expense)	0	0
Total assets	$ 0	$ 0

INTERMEDIATE HOLDING COMPANY (D

INTERMEDIATE HOLDING COMPANY (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Total interest income	$ 1,955,593	$ 2,057,770
Total interest expense	353,028	361,967
Provision for credit losses	735,445	898,462
Total fees and other income	727,899	669,927
Total general and administrative expenses	1,309,816	1,225,382
Income tax provision/(benefit)	78,937	78,860
Net Income	$ 113,081	38,408
Transfer of Equity Interests Resulting from the Final Rule by the Federal Reserve
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Total interest income		2,057,770
Total interest expense		361,967
Provision for credit losses		898,462
Total fees and other income		669,927
Total general and administrative expenses		1,225,382
Income tax provision/(benefit)		78,860
Net Income		38,408
Transfer of Equity Interests Resulting from the Final Rule by the Federal Reserve | As Previously Reported
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Total interest income		1,969,504
Total interest expense		353,452
Provision for credit losses		882,278
Total fees and other income		571,280
Total general and administrative expenses		1,109,274
Income tax provision/(benefit)		65,396
Net Income		13,777
Transfer of Equity Interests Resulting from the Final Rule by the Federal Reserve | Retrospective Adjustments
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Total interest income		88,266
Total interest expense		8,515
Provision for credit losses		16,184
Total fees and other income		98,647
Total general and administrative expenses		116,108
Income tax provision/(benefit)		13,464
Net Income		$ 24,631