TCF Financial 10-Q 6 Nov 17 2017 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2017	Oct. 31, 2017
Document and Entity Information
Entity Registrant Name	TCF FINANCIAL CORP
Entity Central Index Key	814,184
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	Sep. 30, 2017
Document Fiscal Year Focus	2,017
Document Fiscal Period Focus	Q3
Amendment Flag	false
Entity Common Stock, Shares Outstanding		171,932,389

Consolidated Statements of Fina

Consolidated Statements of Financial Condition - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Assets:
Cash and due from banks	$ 711,734	$ 609,603
Investments	87,690	74,714
Securities held to maturity	165,315	181,314
Securities available for sale	1,598,163	1,423,435
Loans and leases held for sale	254,903	268,832
Consumer real estate:
First mortgage lien	1,953,199	2,292,596
Junior lien	2,977,613	2,791,756
Total consumer real estate	4,930,812	5,084,352
Commercial	3,489,680	3,286,478
Leasing and equipment finance	4,730,931	4,336,310
Inventory finance	2,576,077	2,470,175
Auto finance	3,240,413	2,647,741
Other	20,439	18,771
Total loans and leases	18,988,352	17,843,827
Allowance for loan and lease losses	(168,244)	(160,269)
Net loans and leases	18,820,108	17,683,558
Premises and equipment, net	425,112	418,372
Goodwill	227,798	225,640
Other assets	714,215	555,858
Total assets	23,005,038	21,441,326
Deposits:
Checking	6,197,608	6,009,151
Savings	4,972,529	4,719,481
Money market	1,965,291	2,421,467
Certificates of deposit	4,972,058	4,092,423
Total deposits	18,107,486	17,242,522
Short-term borrowings	0	4,391
Long-term borrowings	1,382,588	1,073,181
Total borrowings	1,382,588	1,077,572
Accrued expenses and other liabilities	918,450	676,587
Total liabilities	20,408,524	18,996,681
Equity:
Preferred stock, par value $0.01 per share, 30,000,000 shares authorized; 4,007,000 and 4,006,900 issued, respectively	265,967	263,240
Common stock, par value $0.01 per share, 280,000,000 shares authorized; 171,876,492 and 171,034,506 shares issued, respectively	1,719	1,710
Additional paid-in capital	864,632	862,776
Retained earnings, subject to certain restrictions	1,488,966	1,382,901
Accumulated other comprehensive income (loss)	(13,809)	(33,725)
Treasury stock at cost, 42,566 shares, and other	(30,867)	(49,419)
Total TCF Financial Corporation stockholders' equity	2,576,608	2,427,483
Non-controlling interest in subsidiaries	19,906	17,162
Total equity	2,596,514	2,444,645
Total liabilities and equity	$ 23,005,038	$ 21,441,326

Consolidated Statements of Fin3

Consolidated Statements of Financial Condition (Parenthetical) - $ / shares	Sep. 30, 2017	Dec. 31, 2016
Statement of Financial Position [Abstract]
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (shares)	30,000,000	30,000,000
Preferred stock, shares issued (shares)	4,007,000	4,006,900
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (shares)	280,000,000	280,000,000
Common stock, shares issued (shares)	171,876,492	171,034,506
Treasury stock at cost, shares (shares)	42,566	42,566

Consolidated Statements of Inco

Consolidated Statements of Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Interest income:
Loans and leases	$ 243,973	$ 210,765	$ 697,613	$ 639,698
Securities available for sale	8,486	7,126	24,518	19,020
Securities held to maturity	1,073	1,049	3,388	3,484
Loans held for sale and other	4,073	13,786	22,910	36,870
Total interest income	257,605	232,726	748,429	699,072
Interest expense:
Deposits	17,015	15,851	45,166	46,735
Borrowings	6,487	4,857	19,885	15,677
Total interest expense	23,502	20,708	65,051	62,412
Net interest income	234,103	212,018	683,378	636,660
Provision for credit losses	14,545	13,894	46,184	45,986
Net interest income after provision for credit losses	219,558	198,124	637,194	590,674
Non-interest income:
Fees and service charges	34,605	35,093	98,620	102,532
Card revenue	14,177	13,747	41,481	41,193
ATM revenue	5,234	5,330	14,970	15,639
Subtotal	54,016	54,170	155,071	159,364
Gains on sales of auto loans, net	0	11,624	3,244	33,687
Gains on sales of consumer real estate loans, net	8,049	13,528	25,920	33,751
Servicing fee income	9,966	10,393	32,347	28,778
Subtotal	18,015	35,545	61,511	96,216
Leasing and equipment finance	34,080	28,289	102,208	87,850
Other	2,930	2,270	8,428	7,518
Fees and other revenue	109,041	120,274	327,218	350,948
Gains (losses) on securities, net	189	(600)	189	(716)
Total non-interest income	109,230	119,674	327,407	350,232
Non-interest expense:
Compensation and employee benefits	115,127	117,155	355,522	359,721
Occupancy and equipment	38,766	37,938	117,331	111,830
Other	61,408	59,421	186,520	172,185
Subtotal	215,301	214,514	659,373	643,736
Operating lease depreciation	15,696	10,038	39,404	29,453
Foreclosed real estate and repossessed assets, net	3,829	4,243	13,017	11,298
Other credit costs, net	209	83	334	41
Total non-interest expense	235,035	228,878	712,128	684,528
Income before income tax expense	93,753	88,920	252,473	256,378
Income tax expense	30,704	30,257	77,341	86,766
Income after income tax expense	63,049	58,663	175,132	169,612
Income attributable to non-controlling interest	2,521	2,371	7,894	7,580
Net income attributable to TCF Financial Corporation	60,528	56,292	167,238	162,032
Preferred stock dividends	6,464	4,847	16,158	14,541
Impact of notice to redeem preferred stock	5,779	0	5,779	0
Net income available to common stockholders	$ 48,285	$ 51,445	$ 145,301	$ 147,491
Net income per common share:
Basic (in dollars per share)	$ 0.29	$ 0.31	$ 0.86	$ 0.88
Diluted (in dollars per share)	$ 0.29	$ 0.31	$ 0.86	$ 0.88

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Statement of Comprehensive Income [Abstract]
Net income attributable to TCF Financial Corporation	$ 60,528	$ 56,292	$ 167,238	$ 162,032
Other comprehensive income (loss), net of tax:
Net unrealized gains (losses) on securities available for sale and interest-only strips	2,445	(4,464)	17,555	21,141
Net unrealized gains (losses) on net investment hedges	(1,682)	561	(3,144)	(1,669)
Foreign currency translation adjustment	2,939	(957)	5,527	2,791
Recognized postretirement prior service cost	(8)	(8)	(22)	(22)
Total other comprehensive income (loss), net of tax	3,694	(4,868)	19,916	22,241
Comprehensive income	$ 64,222	$ 51,424	$ 187,154	$ 184,273

Consolidated Statements of Equi

Consolidated Statements of Equity - USD ($) $ in Thousands	Total	TCF Financial Corporation	Preferred Stock	TCF Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Treasury Stock and Other	Non-controlling Interests
Balance (in shares) at Dec. 31, 2015			4,006,900	169,887,030
Balance at Dec. 31, 2015	$ 2,306,917	$ 2,290,916	$ 263,240	$ 1,699	$ 851,836	$ 1,240,347	$ (15,346)	$ (50,860)	$ 16,001
Increase (Decrease) in Equity
Net income	169,612	162,032				162,032			7,580
Other comprehensive income (loss), net of tax	22,241	22,241					22,241
Net investment by (distribution to) non-controlling interest	(4,655)								(4,655)
Dividends on preferred stock	(14,541)	(14,541)				(14,541)
Dividends on common stock	(37,623)	(37,623)				(37,623)
Common shares purchased by TCF employee benefit plans (in shares)				511,420
Common shares purchased by TCF employee benefit plans	5,838	5,838		$ 5	5,833
Stock compensation plans, net of tax (in shares)				595,350
Stock compensation plans, net of tax	4,591	4,591		$ 6	4,585
Change in shares held in trust for deferred compensation plans, at cost					(1,767)			1,767
Balance (in shares) at Sep. 30, 2016			4,006,900	170,993,800
Balance at Sep. 30, 2016	2,452,380	2,433,454	$ 263,240	$ 1,710	860,487	1,350,215	6,895	(49,093)	18,926
Balance (in shares) at Dec. 31, 2016			4,006,900	171,034,506
Balance at Dec. 31, 2016	2,444,645	2,427,483	$ 263,240	$ 1,710	862,776	1,382,901	(33,725)	(49,419)	17,162
Increase (Decrease) in Equity
Change in accounting principle					1,319	(1,319)
Net income	175,132	167,238				167,238			7,894
Other comprehensive income (loss), net of tax	19,916	19,916					19,916
Net investment by (distribution to) non-controlling interest	(5,150)								(5,150)
Public offering of Series C preferred stock (in shares)			7,000
Public offering of Series C preferred stock	169,448	169,448	$ 169,448
Notice to redeem Series A preferred stock (in shares)			(6,900)
Notice to redeem Series A preferred stock	(172,500)	(172,500)	$ (166,721)			(5,779)
Dividends on preferred stock	(16,158)	(16,158)				(16,158)
Dividends on common stock	(37,917)	(37,917)				(37,917)
Common shares purchased by TCF employee benefit plans (in shares)				1,079,753
Common shares purchased by TCF employee benefit plans	17,702	17,702		$ 11	17,691
Stock compensation plans, net of tax (in shares)				(237,767)
Stock compensation plans, net of tax	1,396	1,396		$ (2)	1,398
Change in shares held in trust for deferred compensation plans, at cost					(18,552)			18,552
Balance (in shares) at Sep. 30, 2017			4,007,000	171,876,492
Balance at Sep. 30, 2017	$ 2,596,514	$ 2,576,608	$ 265,967	$ 1,719	$ 864,632	$ 1,488,966	$ (13,809)	$ (30,867)	$ 19,906

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Cash flows from operating activities:
Net income	$ 175,132	$ 169,612
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Provision for credit losses	46,184	45,986
Depreciation and amortization	149,313	135,103
Provision for deferred income taxes	17,685	31,527
Proceeds from sales of loans and leases held for sale	188,756	867,669
Originations of loans and leases held for sale, net of repayments	(359,109)	(904,503)
Gains on sales of assets, net	(37,023)	(75,660)
Net change in other assets and accrued expenses and other liabilities	(95,267)	76,215
Other, net	(33,057)	(21,562)
Net cash provided by (used in) operating activities	52,614	324,387
Cash flows from investing activities:
Proceeds from maturities of and principal collected on securities	105,561	101,166
Purchases of securities	(238,586)	(584,524)
Redemption of Federal Home Loan Bank stock	190,001	102,966
Purchases of Federal Home Loan Bank stock	(203,000)	(92,080)
Proceeds from sales of loans and leases	1,156,854	1,926,290
Loan and lease originations and purchases, net of principal collected on loans and leases	(1,541,913)	(1,358,906)
Acquisition of Equipment Financing & Leasing Corporation, net of cash acquired	(8,120)	0
Proceeds from sales of lease equipment	7,430	11,348
Purchases of lease equipment	(743,819)	(840,650)
Proceeds from sales of real estate owned	39,102	53,045
Purchases of premises and equipment	(36,376)	(22,192)
Other, net	22,099	16,937
Net cash provided by (used in) investing activities	(1,250,767)	(686,600)
Cash flows from financing activities:
Net change in deposits	869,029	514,217
Net change in short-term borrowings	(4,746)	(4,084)
Proceeds from long-term borrowings	7,931,686	3,241,585
Payments on long-term borrowings	(7,625,170)	(3,570,356)
Net proceeds from public offering of Series C preferred stock	169,448	0
Net investment by (distribution to) non-controlling interest	(5,150)	(4,655)
Dividends paid on preferred stock	(14,541)	(14,541)
Dividends paid on common stock	(37,917)	(37,623)
Stock compensation tax (expense) benefit	0	(340)
Common shares sold to TCF employee benefit plans	17,702	5,838
Exercise of stock options	(57)	(684)
Net cash provided by (used in) financing activities	1,300,284	129,357
Net change in cash and due from banks	102,131	(232,856)
Cash and due from banks at beginning of period	609,603	889,337
Cash and due from banks at end of period	711,734	656,481
Cash paid (received) for:
Interest on deposits and borrowings	60,561	59,753
Income taxes, net	53,621	(12,235)
Transfer of loans to other assets	74,958	76,417
Transfer of loans and leases from held for investment to held for sale, net	965,532	2,097,857
Transfer of mandatorily redeemable Series A preferred stock to accrued expenses and other liabilities	$ 172,500	$ 0

Basis of Presentation

Basis of Presentation	9 Months Ended
	Sep. 30, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Basis of Presentation TCF Financial Corporation (together with its direct and indirect subsidiaries, "we," "us," "our," "TCF" or the "Company"), a Delaware corporation, is a national bank holding company based in Wayzata, Minnesota. References herein to "TCF Financial" or the "Holding Company" refer to TCF Financial Corporation on an unconsolidated basis. TCF's principal subsidiary, TCF National Bank ("TCF Bank"), is headquartered in Sioux Falls, South Dakota. The accompanying unaudited consolidated financial statements have been prepared in accordance with the instructions to Form 10-Q and, therefore do not include all of the information and notes necessary for complete financial statements in conformity with U.S. generally accepted accounting principles ("GAAP"). The information in this Quarterly Report on Form 10-Q is written with the presumption that the users of the interim financial statements have read or have access to the Company's most recent Annual Report on Form 10-K, which contains the latest audited financial statements and notes thereto, together with Management's Discussion and Analysis of Financial Condition and Results of Operations at December 31, 2016 , and for the year then ended. All significant intercompany accounts and transactions have been eliminated in consolidation. Accounting policies in effect at December 31, 2016 remain significantly unchanged and have been followed similarly as in previous periods. The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, disclosure of contingent assets and liabilities at the date of the financial statements and the reported amount of revenues and expenses during the reporting period. These estimates are based on information available to management at the time the estimates are made. Actual results could differ from those estimates. In the opinion of management, the accompanying unaudited consolidated financial statements contain all the significant adjustments, consisting of normal recurring items, considered necessary for fair presentation. The results of operations for interim periods are not necessarily indicative of the results to be expected for the entire year. During the second quarter of 2017, the Company adopted Accounting Standards Update ("ASU") No. 2017-08: Receivables - Nonrefundable Fees and Other Costs (Subtopic 310-20): Premium Amortization on Purchased Callable Debt Securities , which clarifies the premium amortization period on purchased callable debt securities should be to the earliest call date, rather than the contractual maturity date. The adoption of this ASU was on a modified retrospective basis and required any adjustments as a result of the adoption during an interim period to be reflected as of January 1, 2017. The adoption of this ASU did not impact results of operations, retained earnings or cash flows. Effective January 1, 2017, the Company adopted ASU No. 2016-09, Compensation - Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting , which simplified several aspects of the accounting for share-based payment transactions, including income tax consequences, classification of awards as either equity or liabilities and classification on the statement of cash flows. As a result of the adoption, the Company recorded a cumulative effect reduction to the opening balance of retained earnings of $1.3 million and a corresponding increase to additional paid-in capital. This cumulative effect adjustment to retained earnings was related to a policy election to account for forfeitures as they occur, thereby eliminating the need for an estimated forfeiture reserve against future cancellations. The adoption of this ASU on a prospective basis requires that tax benefits related to stock compensation be recorded to income tax expense, instead of to additional paid-in capital. The Company elected the prospective basis regarding the presentation of stock compensation tax (expense) benefit in the Consolidated Statement of Cash Flows as an operating activity, and as a result prior periods were not adjusted.

Cash and Due from Banks

Cash and Due from Banks	9 Months Ended
	Sep. 30, 2017
Cash and Cash Equivalents [Abstract]
Cash and Due from Banks	Cash and Due from Banks At September 30, 2017 and December 31, 2016 , TCF Bank was required by Federal Reserve regulations to maintain reserves of $108.2 million and $103.7 million , respectively, in cash on hand or at the Federal Reserve Bank. TCF maintains cash balances that are restricted as to their use in accordance with certain contractual agreements primarily related to the servicing of auto finance loans. Cash payments received on loans serviced for third parties are generally held in separate accounts until remitted. TCF may also retain cash balances for collateral on certain borrowings, forward foreign exchange contracts, interest rate contracts and other contracts. TCF maintained restricted cash totaling $38.8 million and $51.3 million at September 30, 2017 and December 31, 2016 , respectively. TCF had cash held in interest-bearing accounts of $429.0 million and $326.5 million at September 30, 2017 and December 31, 2016 , respectively.

Securities Available for Sale a

Securities Available for Sale and Securities Held to Maturity	9 Months Ended
	Sep. 30, 2017
Investments, Debt and Equity Securities [Abstract]
Securities Available for Sale and Securities Held to Maturity	Securities Available for Sale and Securities Held to Maturity Securities were as follows: At September 30, 2017 At December 31, 2016 (In thousands) Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Securities available for sale: Mortgage-backed securities: U.S. Government sponsored enterprises and federal agencies $ 838,801 $ 1,040 $ 9,220 $ 830,621 $ 827,722 $ 423 $ 17,254 $ 810,891 Other 8 — — 8 18 — — 18 Obligations of states and political subdivisions 764,534 8,709 5,709 767,534 628,972 394 16,840 612,526 Total securities available for sale $ 1,603,343 $ 9,749 $ 14,929 $ 1,598,163 $ 1,456,712 $ 817 $ 34,094 $ 1,423,435 Securities held to maturity: Mortgage-backed securities: U.S. Government sponsored enterprises and federal agencies $ 162,515 $ 5,068 $ 281 $ 167,302 $ 178,514 $ 3,072 $ 440 $ 181,146 Other securities 2,800 — — 2,800 2,800 — — 2,800 Total securities held to maturity $ 165,315 $ 5,068 $ 281 $ 170,102 $ 181,314 $ 3,072 $ 440 $ 183,946 At September 30, 2017 and December 31, 2016 , mortgage-backed securities with a carrying value of $1.1 million and $7.5 million , respectively, were pledged as collateral to secure certain deposits and borrowings. We have assessed each security with unrealized losses included in the table above for credit impairment. As part of that assessment we evaluated and concluded that we do not intend to sell any of the securities and that it is more likely than not that we will not be required to sell prior to recovery of the amortized cost. Unrealized losses on securities available for sale and securities held to maturity were due to changes in interest rates. Gains (losses) on securities, net was $0.2 million for the third quarter and first nine months of 2017 , compared with $(0.6) million and $(0.7) million for the same periods in 2016 . There were no sales or impairment charges for securities available for sale during the third quarter and first nine months of 2017 and 2016 . TCF received $0.2 million in recoveries on previously impaired securities held to maturity for the third quarter and first nine months of 2017 compared to impairment charges of $0.6 million and $0.7 million for the same periods in 2016 . Gross unrealized losses and fair value of securities available for sale and securities held to maturity aggregated by investment category and the length of time the securities were in a continuous loss position were as follows: At September 30, 2017 Less than 12 months 12 months or more Total (In thousands) Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses Securities available for sale: Mortgage-backed securities: U.S. Government sponsored enterprises and federal agencies $ 405,892 $ 3,936 $ 207,494 $ 5,284 $ 613,386 $ 9,220 Obligations of states and political subdivisions 128,741 821 203,775 4,888 332,516 5,709 Total securities available for sale $ 534,633 $ 4,757 $ 411,269 $ 10,172 $ 945,902 $ 14,929 Securities held to maturity: Mortgage-backed securities: U.S. Government sponsored enterprises and federal agencies $ 17,988 $ 142 $ 4,808 $ 139 $ 22,796 $ 281 Total securities held to maturity $ 17,988 $ 142 $ 4,808 $ 139 $ 22,796 $ 281 At December 31, 2016 Less than 12 months 12 months or more Total (In thousands) Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses Securities available for sale: Mortgage-backed securities: U.S. Government sponsored enterprises and federal agencies $ 732,724 $ 17,254 $ — $ — $ 732,724 $ 17,254 Obligations of states and political subdivisions 501,620 16,840 — — 501,620 16,840 Total securities available for sale $ 1,234,344 $ 34,094 $ — $ — $ 1,234,344 $ 34,094 Securities held to maturity: Mortgage-backed securities: U.S. Government sponsored enterprises and federal agencies $ 27,090 $ 440 $ — $ — $ 27,090 $ 440 Total securities held to maturity $ 27,090 $ 440 $ — $ — $ 27,090 $ 440 The amortized cost and fair value of securities available for sale and securities held to maturity by final contractual maturity were as follows. The remaining contractual principal maturities do not consider possible prepayments. Remaining expected maturities will differ from contractual maturities because borrowers may have the right to prepay. At September 30, 2017 At December 31, 2016 (In thousands) Amortized Cost Fair Value Amortized Cost Fair Value Securities available for sale: Due in one year or less $ 8 $ 8 $ 1 $ 1 Due in 1-5 years 9,547 9,757 18 18 Due in 5-10 years 448,223 453,761 331,430 329,005 Due after 10 years 1,145,565 1,134,637 1,125,263 1,094,411 Total securities available for sale $ 1,603,343 $ 1,598,163 $ 1,456,712 $ 1,423,435 Securities held to maturity: Due in one year or less $ 1,000 $ 1,000 $ — $ — Due in 1-5 years 400 400 1,400 1,400 Due in 5-10 years 1,400 1,400 1,400 1,400 Due after 10 years 162,515 167,302 178,514 181,146 Total securities held to maturity $ 165,315 $ 170,102 $ 181,314 $ 183,946 Interest income attributable to securities available for sale was as follows: Quarter Ended Nine Months Ended September 30, (In thousands) 2017 2016 2017 2016 Taxable interest income $ 4,619 $ 4,167 $ 13,707 $ 11,838 Tax-exempt interest income 3,867 2,959 10,811 7,182 Total interest income $ 8,486 $ 7,126 $ 24,518 $ 19,020

Loans and Leases

Loans and Leases	9 Months Ended
	Sep. 30, 2017
Receivables [Abstract]
Loans and Leases	Loans and Leases Loans and leases were as follows: (In thousands) At September 30, 2017 At December 31, 2016 Consumer real estate: First mortgage lien $ 1,953,199 $ 2,292,596 Junior lien 2,977,613 2,791,756 Total consumer real estate 4,930,812 5,084,352 Commercial: Commercial real estate: Permanent 2,373,001 2,356,287 Construction and development 338,667 277,904 Total commercial real estate 2,711,668 2,634,191 Commercial business 778,012 652,287 Total commercial 3,489,680 3,286,478 Leasing and equipment finance 4,730,931 4,336,310 Inventory finance 2,576,077 2,470,175 Auto finance 3,240,413 2,647,741 Other 20,439 18,771 Total loans and leases (1) $ 18,988,352 $ 17,843,827 (1) Loans and leases are reported at historical cost including net direct fees and costs associated with originating and acquiring loans and leases, lease residuals, unearned income and unamortized purchase premiums and discounts. The aggregate amount of these loan and lease adjustments was $43.2 million and $54.1 million at September 30, 2017 and December 31, 2016 , respectively. Loan Sales The following tables summarize the net sales proceeds for consumer real estate and auto finance loans sold, the securitization receivable recorded, the interest-only strips received, the recorded investment in loans sold, including accrued interest, and the net gains, as applicable. TCF generally retains servicing on loans sold. Included in consumer real estate loans sold in the third quarter and first nine months of 2017 were $21.8 million and $71.2 million , respectively, of non-accrual loans, which were sold servicing released. The auto finance securitizations included in the third quarter and first nine months of 2016 qualify for sale accounting and are executed by transferring the recorded investment to trusts. These trusts are considered variable interest entities due to their limited capitalization and special purpose nature. TCF has concluded it is not the primary beneficiary of the trusts and therefore, they are not consolidated. No servicing assets or liabilities related to consumer real estate or auto finance loans were recorded within TCF's Consolidated Statements of Financial Condition, as the contractual servicing fees are adequate to compensate TCF for its servicing responsibilities based on the amount demanded by the marketplace. Quarter Ended September 30, 2017 (In thousands) Consumer Real Estate Loans Auto Finance Loans Auto Finance Securitizations Total Auto Finance Loans Sales proceeds, net (1) $ 300,038 $ — $ — $ — Interest-only strips, initial value 542 — — — Recorded investment in loans sold, including accrued interest (292,267 ) — — — Net gains (2) $ 8,313 $ — $ — $ — Quarter Ended September 30, 2016 (In thousands) Consumer Real Estate Loans Auto Finance Loans Auto Finance Securitizations Total Auto Finance Loans Sales proceeds, net (1) $ 450,666 $ 105,766 $ 525,745 $ 631,511 Interest-only strips, initial value 2,513 — — — Recorded investment in loans sold, including accrued interest (438,900 ) (100,009 ) (519,315 ) (619,324 ) Net gains (2) $ 14,279 $ 5,757 $ 6,430 $ 12,187 Nine Months Ended September 30, 2017 (In thousands) Consumer Real Estate Loans Auto Finance Loans Auto Finance Securitizations Total Auto Finance Loans Sales proceeds, net (1) $ 971,755 $ 302,616 $ — $ 302,616 Interest-only strips, initial value 2,458 — — — Recorded investment in loans sold, including accrued interest (947,735 ) (298,581 ) — (298,581 ) Net gains (2) $ 26,478 $ 4,035 $ — $ 4,035 Nine Months Ended September 30, 2016 (In thousands) Consumer Real Estate Loans Auto Finance Loans Auto Finance Securitizations Total Auto Finance Loans Sales proceeds, net (1) $ 1,129,251 $ 688,227 $ 925,986 $ 1,614,213 Securitization receivable — — 18,620 18,620 Interest-only strips, initial value 13,426 5,695 — 5,695 Recorded investment in loans sold, including accrued interest (1,107,327 ) (669,775 ) (933,638 ) (1,603,413 ) Net gains (2) $ 35,350 $ 24,147 $ 10,968 $ 35,115 (1) Includes transaction fees and other sales related adjustments Total interest-only strips and the contractual liabilities related to loan sales were as follows: (In thousands) At September 30, 2017 At December 31, 2016 Interest-only strips attributable to: Consumer real estate loan sales $ 17,445 $ 27,260 Auto finance loan sales 6,352 12,892 Contractual liabilities attributable to: Consumer real estate loan sales $ 1,082 $ 701 Auto finance loan sales — 168 TCF recorded no impairment charges on the consumer real estate interest-only strips in the third quarter and $0.9 million of impairment charges for the first nine months of 2017 , respectively, compared with $0.2 million and $0.8 million for the same periods in 2016 . TCF recorded $0.2 million and $0.4 million of impairment charges on the auto finance interest-only strips for the third quarter and first nine months of 2017 , respectively, compared with $2.3 million for each of the same periods in 2016 . TCF's agreements to sell auto and consumer real estate loans typically contain certain representations, warranties and covenants regarding the loans sold or securitized. These representations, warranties and covenants generally relate to, among other things, the ownership of the loan, the validity, priority and perfection of the lien securing the loan, accuracy of information supplied to the buyer or investor, the loan's compliance with the criteria set forth in the agreement, the manner in which the loans will be serviced, payment delinquency and compliance with applicable laws and regulations. These agreements generally require the repurchase of loans or indemnification in the event TCF breaches these representations, warranties or covenants and such breaches are not cured. In addition, some agreements contain a requirement to repurchase loans as a result of early payoffs by the borrower, early payment default of the borrower, or the failure to obtain valid title. During the first nine months of 2017 and 2016 , losses related to repurchases pursuant to such representations, warranties and covenants were immaterial. The majority of such repurchases were of auto finance loans where TCF typically has contractual agreements with the automobile dealerships that originated the loans requiring the dealers to repurchase such contracts from TCF. Acquired Loans and Leases TCF acquires loans and leases through business combinations and purchases of loan and lease portfolios. These loans and leases are recorded at fair value at acquisition and the fair value discount or premium is recognized as an adjustment to yield over the remaining life of each loan or lease. Loans are considered purchased credit impaired ("PCI") loans if it is probable at acquisition that all contractually required payments will not be collected. Upon acquisition, the acquired PCI loans are recorded at fair value without a corresponding allowance for loan losses as the non-accretable discount is adequate to absorb expected remaining credit losses. The excess of expected cash flows to be collected over the initial fair value of the acquired portfolios is referred to as the accretable yield and is accreted into interest income over the estimated life of the acquired portfolios using the effective yield method. The accretable yield is affected by changes in interest rate indices for variable-rate acquired portfolios, changes in prepayment assumptions and changes in the expected principal and interest payments over the estimated life of the loan. These acquired loans are classified as accruing and interest income continues to be recognized unless expected credit losses exceed the non-accretable discount. TCF purchased loans and leases at fair value of $624.6 million and $631.5 million during the third quarter and first nine months of 2017 , respectively, compared with $17.5 million for each of the same periods in 2016 . Included in loans and leases acquired during the third quarter of 2017 were $14.0 million of leasing and equipment finance PCI loans that TCF acquired on September 29, 2017. On the acquisition date, the leasing and equipment finance PCI loans had contractually required payments receivable of $24.0 million , expected cash flows of $16.6 million and a fair value (initial carrying amount) of $14.0 million . The $7.4 million difference between the contractually required payments receivable and the expected cash flows represents the non-accretable difference. The $2.6 million difference between the expected cash flows and fair value represented the initial accretable yield.

Allowance for Loan and Lease Lo

Allowance for Loan and Lease Losses and Credit Quality Information	9 Months Ended
	Sep. 30, 2017
Allowance for Loan and Lease Losses and Credit Quality Information
Allowance for Loan and Lease Losses and Credit Quality Information	Allowance for Loan and Lease Losses and Credit Quality Information The rollforwards of the allowance for loan and lease losses were as follows: (In thousands) Consumer Commercial Leasing and Inventory Auto Other Total At or For the Quarter Ended September 30, 2017: Balance, beginning of period $ 52,408 $ 34,669 $ 21,922 $ 12,129 $ 43,893 $ 599 $ 165,620 Charge-offs (2,940 ) — (1,404 ) (750 ) (11,028 ) (1,877 ) (17,999 ) Recoveries 6,392 196 358 281 1,780 840 9,847 Net (charge-offs) recoveries 3,452 196 (1,046 ) (469 ) (9,248 ) (1,037 ) (8,152 ) Provision for credit losses (5,669 ) 1,479 1,967 240 15,437 1,091 14,545 Other (2,353 ) — (72 ) 78 (1,422 ) — (3,769 ) Balance, end of period $ 47,838 $ 36,344 $ 22,771 $ 11,978 $ 48,660 $ 653 $ 168,244 At or For the Quarter Ended September 30, 2016: Balance, beginning of period $ 64,765 $ 31,161 $ 20,124 $ 12,084 $ 29,772 $ 666 $ 158,572 Charge-offs (4,058 ) (4 ) (2,513 ) (697 ) (6,756 ) (2,216 ) (16,244 ) Recoveries 1,838 80 671 129 999 1,062 4,779 Net (charge-offs) recoveries (2,220 ) 76 (1,842 ) (568 ) (5,757 ) (1,154 ) (11,465 ) Provision for credit losses 1,402 411 2,367 335 8,361 1,018 13,894 Other (1,855 ) — — (44 ) (3,261 ) — (5,160 ) Balance, end of period $ 62,092 $ 31,648 $ 20,649 $ 11,807 $ 29,115 $ 530 $ 155,841 (In thousands) Consumer Commercial Leasing and Inventory Auto Other Total At or For the Nine Months Ended September 30, 2017: Balance, beginning of period $ 59,448 $ 32,695 $ 21,350 $ 13,932 $ 32,310 $ 534 $ 160,269 Charge-offs (9,205 ) (5,431 ) (5,694 ) (1,856 ) (28,045 ) (4,996 ) (55,227 ) Recoveries 18,783 455 1,718 675 4,680 2,761 29,072 Net (charge-offs) recoveries 9,578 (4,976 ) (3,976 ) (1,181 ) (23,365 ) (2,235 ) (26,155 ) Provision for credit losses (13,553 ) 8,625 5,520 (903 ) 44,141 2,354 46,184 Other (7,635 ) — (123 ) 130 (4,426 ) — (12,054 ) Balance, end of period $ 47,838 $ 36,344 $ 22,771 $ 11,978 $ 48,660 $ 653 $ 168,244 At or For the Nine Months Ended September 30, 2016: Balance, beginning of period $ 67,992 $ 30,185 $ 19,018 $ 11,128 $ 26,486 $ 1,245 $ 156,054 Charge-offs (14,550 ) (668 ) (6,125 ) (2,084 ) (18,683 ) (5,524 ) (47,634 ) Recoveries 5,094 330 1,834 696 2,743 3,435 14,132 Net (charge-offs) recoveries (9,456 ) (338 ) (4,291 ) (1,388 ) (15,940 ) (2,089 ) (33,502 ) Provision for credit losses 8,963 1,801 5,922 1,925 26,001 1,374 45,986 Other (5,407 ) — — 142 (7,432 ) — (12,697 ) Balance, end of period $ 62,092 $ 31,648 $ 20,649 $ 11,807 $ 29,115 $ 530 $ 155,841 The allowance for loan and lease losses and loans and leases outstanding by type of allowance methodology were as follows: At September 30, 2017 (In thousands) Consumer Commercial Leasing and Inventory Auto Other Total Allowance for loan and lease losses: Collectively evaluated for impairment $ 29,042 $ 35,342 $ 19,049 $ 11,462 $ 48,234 $ 652 $ 143,781 Individually evaluated for impairment 18,796 1,002 3,722 516 426 1 24,463 Total $ 47,838 $ 36,344 $ 22,771 $ 11,978 $ 48,660 $ 653 $ 168,244 Loans and leases outstanding: Collectively evaluated for impairment $ 4,784,528 $ 3,457,229 $ 4,692,676 $ 2,572,899 $ 3,230,469 $ 20,436 $ 18,758,237 Individually evaluated for impairment 146,284 32,451 24,295 3,178 9,944 3 216,155 Loans acquired with deteriorated credit quality — — 13,960 — — — 13,960 Total $ 4,930,812 $ 3,489,680 $ 4,730,931 $ 2,576,077 $ 3,240,413 $ 20,439 $ 18,988,352 At December 31, 2016 (In thousands) Consumer Real Estate Commercial Leasing and Equipment Finance Inventory Finance Auto Finance Other Total Allowance for loan and lease losses: Collectively evaluated for impairment $ 36,103 $ 31,430 $ 19,093 $ 13,304 $ 31,106 $ 533 $ 131,569 Individually evaluated for impairment 23,345 1,265 2,257 628 1,204 1 28,700 Total $ 59,448 $ 32,695 $ 21,350 $ 13,932 $ 32,310 $ 534 $ 160,269 Loans and leases outstanding: Collectively evaluated for impairment $ 4,884,653 $ 3,242,389 $ 4,320,129 $ 2,465,041 $ 2,638,380 $ 18,765 $ 17,569,357 Individually evaluated for impairment 199,699 44,089 16,165 5,134 9,360 6 274,453 Loans acquired with deteriorated credit quality — — 16 — 1 — 17 Total $ 5,084,352 $ 3,286,478 $ 4,336,310 $ 2,470,175 $ 2,647,741 $ 18,771 $ 17,843,827 Accruing and Non-accrual Loans and Leases TCF's key credit quality indicator is the receivable's payment performance status, defined as accruing or non-accruing. Non-accrual loans and leases are those which management believes have a higher risk of loss. Delinquent balances are determined based on the contractual terms of the loan or lease. TCF's accruing and non-accrual loans and leases were as follows: At September 30, 2017 (In thousands) Current-59 Days Delinquent and Accruing 60-89 Days Delinquent and Accruing 90 Days or More Delinquent and Accruing Total Accruing Non-accrual Total Consumer real estate: First mortgage lien $ 1,884,543 $ 4,607 $ 1,387 $ 1,890,537 $ 62,662 $ 1,953,199 Junior lien 2,958,098 1,446 — 2,959,544 18,069 2,977,613 Total consumer real estate 4,842,641 6,053 1,387 4,850,081 80,731 4,930,812 Commercial: Commercial real estate 2,701,331 — — 2,701,331 10,337 2,711,668 Commercial business 778,010 2 — 778,012 — 778,012 Total commercial 3,479,341 2 — 3,479,343 10,337 3,489,680 Leasing and equipment finance 4,691,029 4,783 2,439 4,698,251 18,720 4,716,971 Inventory finance 2,572,764 58 77 2,572,899 3,178 2,576,077 Auto finance 3,225,757 4,840 3,163 3,233,760 6,653 3,240,413 Other 20,425 10 4 20,439 — 20,439 Subtotal 18,831,957 15,746 7,070 18,854,773 119,619 18,974,392 Portfolios acquired with deteriorated credit quality 12,644 — 1,316 13,960 — 13,960 Total $ 18,844,601 $ 15,746 $ 8,386 $ 18,868,733 $ 119,619 $ 18,988,352 At December 31, 2016 (In thousands) Current-59 Days Delinquent and Accruing 60-89 Days Delinquent and Accruing 90 Days or More Delinquent and Accruing Total Accruing Non-accrual Total Consumer real estate: First mortgage lien $ 2,177,746 $ 6,581 $ 2,144 $ 2,186,471 $ 106,125 $ 2,292,596 Junior lien 2,744,006 1,404 — 2,745,410 46,346 2,791,756 Total consumer real estate 4,921,752 7,985 2,144 4,931,881 152,471 5,084,352 Commercial: Commercial real estate 2,628,627 — — 2,628,627 5,564 2,634,191 Commercial business 651,932 — — 651,932 355 652,287 Total commercial 3,280,559 — — 3,280,559 5,919 3,286,478 Leasing and equipment finance 4,320,795 3,478 1,045 4,325,318 10,880 4,336,198 Inventory finance 2,464,986 16 39 2,465,041 5,134 2,470,175 Auto finance 2,634,600 3,785 2,317 2,640,702 7,038 2,647,740 Other 18,748 14 6 18,768 3 18,771 Subtotal 17,641,440 15,278 5,551 17,662,269 181,445 17,843,714 Portfolios acquired with deteriorated credit quality 113 — — 113 — 113 Total $ 17,641,553 $ 15,278 $ 5,551 $ 17,662,382 $ 181,445 $ 17,843,827 Interest income recognized on loans and leases in non-accrual status and contractual interest that would have been recorded had the loans and leases performed in accordance with their original contractual terms were as follows: Quarter Ended September 30, Nine Months Ended September 30, (In thousands) 2017 2016 2017 2016 Contractual interest due on non-accrual loans and leases $ 3,529 $ 5,127 $ 11,606 $ 15,604 Interest income recognized on non-accrual loans and leases 581 1,048 2,274 3,097 Unrecognized interest income $ 2,948 $ 4,079 $ 9,332 $ 12,507 Consumer real estate loans to customers currently involved in ongoing Chapter 7 or Chapter 13 bankruptcy proceedings which have not yet been discharged, dismissed or completed were as follows: (In thousands) At September 30, 2017 At December 31, 2016 Consumer real estate loans to customers in bankruptcy: 0-59 days delinquent and accruing $ 9,164 $ 13,675 Non-accrual 11,017 21,372 Total consumer real estate loans to customers in bankruptcy $ 20,181 $ 35,047 Loan Modifications for Borrowers with Financial Difficulties Included within loans and leases in the previous accruing and non-accrual loans and leases table are certain loans that have been modified in order to maximize collection of loan balances. If, for economic or legal reasons related to the customer's financial difficulties, TCF grants a concession, the modified loan is classified as a troubled debt restructuring ("TDR") loan. All loans classified as TDR loans are considered to be impaired. For purposes of this disclosure, PCI loans have been excluded. TDR loans were as follows: At September 30, 2017 At December 31, 2016 (In thousands) Accruing TDR Loans Non-accrual TDR Loans Total TDR Loans Accruing TDR Loans Non-accrual TDR Loans Total TDR Loans Consumer real estate $ 90,753 $ 33,854 $ 124,607 $ 98,606 $ 71,961 $ 170,567 Commercial 4,677 3,491 8,168 20,304 2,170 22,474 Leasing and equipment finance 5,215 2,591 7,806 4,802 1,350 6,152 Inventory finance — 911 911 — 357 357 Auto finance 3,290 4,741 8,031 2,323 5,504 7,827 Other 5 — 5 6 — 6 Total $ 103,940 $ 45,588 $ 149,528 $ 126,041 $ 81,342 $ 207,383 Unfunded commitments to consumer real estate and commercial loans classified as TDRs were $0.4 million at both September 30, 2017 and December 31, 2016 . At September 30, 2017 and December 31, 2016 , no additional funds were committed to leasing and equipment finance, inventory finance or auto finance loans classified as TDRs. Unrecognized interest represents the difference between interest income recognized on accruing TDR loans and the contractual interest that would have been recorded under the original contractual terms. For the third quarter of 2017 , unrecognized interest income for consumer real estate first mortgage lien accruing TDR loans and consumer real estate junior lien accruing TDR loans was $0.4 million and $0.1 million , respectively. The average yield for the same period on consumer real estate accruing TDR loans was 4.3% , which compares to the original contractual average rate of 6.8% . For the third quarter of 2016 , unrecognized interest income for the consumer real estate first mortgage lien accruing TDR loans and consumer real estate junior lien accruing TDR loans was $0.5 million and $0.2 million , respectively. The average yield for the same period on consumer real estate accruing TDR loans was 4.3% , which compares to the original contractual average rate of 6.7% . The unrecognized interest income for the remaining classes of finance receivables was not material for the third quarter s of 2017 and 2016 . For the first nine months of 2017 , unrecognized interest income for consumer real estate first mortgage lien accruing TDR loans and consumer real estate junior lien accruing TDR loans was $1.4 million and $0.5 million , respectively. For the first nine months of 2016 , unrecognized interest income for consumer real estate first mortgage lien accruing TDR loans and consumer real estate junior lien accruing TDR loans was $1.5 million and $0.5 million , respectively. The average yield for both the first nine months of 2017 and 2016 on consumer real estate accruing TDR loans was 4.2% , which compares to the original contractual average rate of 6.7% . The unrecognized interest income for the remaining classes of finance receivables was not material for the first nine months of 2017 and 2016 . TCF considers a loan to have defaulted when under the modified terms it becomes 90 or more days delinquent, has been transferred to non-accrual status, has been charged down or has been transferred to other real estate owned or repossessed and returned assets. The following table summarizes the TDR loans that defaulted during the third quarter and first nine months of 2017 and 2016 , which were modified during the respective reporting period or within one year of the beginning of the respective reporting period. Included in commercial loans that defaulted during the nine months ended September 30, 2017 was one commercial loan that was transferred to non-accrual status during the first quarter of 2017. Quarter Ended September 30, Nine Months Ended September 30, (In thousands) 2017 2016 2017 2016 Defaulted TDR loan balances modified during the applicable period: (1) Consumer real estate: First mortgage lien $ 856 $ 2,150 $ 2,328 $ 6,635 Junior lien 317 179 518 676 Total consumer real estate 1,173 2,329 2,846 7,311 Commercial real estate — — 6,681 — Leasing and equipment finance 451 — 635 — Auto finance 260 334 867 1,233 Defaulted TDR loan balances modified during the applicable period $ 1,884 $ 2,663 $ 11,029 $ 8,544 (1) The loan balances presented are not materially different than the pre-modification loan balances as TCF's loan modifications generally do not forgive principal amounts. Consumer real estate TDR loans are evaluated separately in TCF's allowance methodology. Impairment is generally based upon the present value of the expected future cash flows discounted at the loan's initial effective interest rate, unless the loans are collateral dependent, in which case loan impairment is based upon the fair value of the collateral less selling expenses. The allowance on accruing consumer real estate TDR loans was $17.6 million , or 19.4% of the outstanding balance, at September 30, 2017 , and $19.3 million , or 19.6% of the outstanding balance, at December 31, 2016 . In determining impairment for consumer real estate accruing TDR loans, TCF utilized remaining re-default rates ranging from 9% to 33% at September 30, 2017 and 10% to 33% at December 31, 2016 , depending on lien position and actual experience. At September 30, 2017 , 1.3% of accruing consumer real estate TDR loans were more than 60 days delinquent, compared with 1.5% at December 31, 2016 . Consumer real estate TDR loans generally remain on accruing status following modification if they are less than 90 days past due and payment in full under the modified terms of the loan is expected based on a current credit evaluation and historical payment performance. Of the non-accrual TDR balance at September 30, 2017 , $22.0 million , or 65.1% , were loans discharged in Chapter 7 bankruptcy that were not reaffirmed by the borrower, of which 70.4% were current. Of the non-accrual TDR balance at December 31, 2016 , $47.4 million , or 65.9% , were loans discharged in Chapter 7 bankruptcy that were not reaffirmed, of which 82.2% were current. All eligible loans are re-aged to current delinquency status upon modification. Commercial TDR loans are individually evaluated for impairment based upon the present value of the expected future cash flows discounted at the loan's initial effective interest rate, unless the loans are collateral dependent, in which case impairment is based upon the fair value of collateral less estimated selling costs; however if payment or satisfaction of the loan is dependent on the operation, rather than the sale of the collateral, the impairment does not include selling costs. The allowance on accruing commercial TDR loans was less than $0.1 million , or less than 0.1% of the outstanding balance, at September 30, 2017 , and $1.1 million , or 5.6% of the outstanding balance, at December 31, 2016 . No accruing commercial TDR loans were 60 days or more delinquent at September 30, 2017 and December 31, 2016 . Impaired Loans TCF considers impaired loans to include non-accrual commercial loans, non-accrual equipment finance loans and non-accrual inventory finance loans, as well as all TDR loans. For purposes of this disclosure, PCI loans have been excluded. Non-accrual impaired loans, including non-accrual TDR loans, are included in non-accrual loans and leases within the previous tables. Accruing TDR loans have been disclosed by delinquency status within the previous tables of accruing and non-accrual loans and leases. In the following table, the loan balance of impaired loans represents the amount recorded within loans and leases on the Consolidated Statements of Financial Condition, whereas the unpaid contractual balance represents the balances legally owed by the borrowers. Information on impaired loans was as follows: At September 30, 2017 At December 31, 2016 (In thousands) Unpaid Loan Related Unpaid Loan Related Impaired loans with an allowance recorded: Consumer real estate: First mortgage lien $ 90,190 $ 80,379 $ 14,272 $ 122,704 $ 104,601 $ 16,835 Junior lien 33,607 30,757 4,239 62,481 51,410 5,829 Total consumer real estate 123,797 111,136 18,511 185,185 156,011 22,664 Commercial: Commercial real estate 6,853 6,846 1,000 10,083 10,075 1,262 Commercial business 13 13 2 14 14 3 Total commercial 6,866 6,859 1,002 10,097 10,089 1,265 Leasing and equipment finance 13,376 13,376 1,928 9,900 9,900 1,044 Inventory finance 1,871 1,874 516 4,357 4,365 628 Auto finance 1,572 1,255 364 5,801 5,419 1,126 Other 4 5 1 6 6 1 Total impaired loans with an allowance recorded 147,486 134,505 22,322 215,346 185,790 26,728 Impaired loans without an allowance recorded: Consumer real estate: First mortgage lien 17,150 11,855 — 18,539 12,674 — Junior lien 16,358 1,616 — 26,915 1,882 — Total consumer real estate 33,508 13,471 — 45,454 14,556 — Commercial: Commercial real estate 11,755 7,940 — 21,601 15,780 — Commercial business 215 215 — 354 354 — Total commercial 11,970 8,155 — 21,955 16,134 — Inventory finance 1,299 1,304 — 767 769 — Auto finance 8,993 6,776 — 3,919 2,408 — Other 87 — — 85 — — Total impaired loans without an allowance recorded 55,857 29,706 — 72,180 33,867 — Total impaired loans $ 203,343 $ 164,211 $ 22,322 $ 287,526 $ 219,657 $ 26,728 The average loan balance of impaired loans and interest income recognized on impaired loans were as follows: Quarter Ended September 30, Nine Months Ended September 30, 2017 2016 2017 2016 (In thousands) Average Loan Balance Interest Income Recognized Average Loan Balance Interest Income Recognized Average Loan Balance Interest Income Recognized Average Loan Balance Interest Income Recognized Impaired loans with an allowance recorded: Consumer real estate: First mortgage lien $ 84,126 $ 679 $ 114,966 $ 944 $ 92,490 $ 2,097 $ 116,315 $ 2,762 Junior lien 33,438 382 54,651 675 41,083 1,209 55,824 1,993 Total consumer real estate 117,564 1,061 169,617 1,619 133,573 3,306 172,139 4,755 Commercial: Commercial real estate 5,119 — 12,926 100 8,461 16 6,530 230 Commercial business 13 — 15 — 13 48 15 — Total commercial 5,132 — 12,941 100 8,474 64 6,545 230 Leasing and equipment finance 11,837 10 10,844 3 11,638 28 8,963 21 Inventory finance 2,078 18 777 10 3,120 176 1,030 41 Auto finance 2,792 55 5,871 33 3,337 146 6,883 72 Other 4 — 8 — 6 — 10 — Total impaired loans with an allowance recorded 139,407 1,144 200,058 1,765 160,148 3,720 195,570 5,119 Impaired loans without an allowance recorded: Consumer real estate: First mortgage lien 11,871 212 8,023 120 12,264 736 8,280 228 Junior lien 1,669 71 1,348 170 1,749 392 1,368 485 Total consumer real estate 13,540 283 9,371 290 14,013 1,128 9,648 713 Commercial: Commercial real estate 12,090 95 15,101 170 11,860 438 22,729 606 Commercial business 334 2 3,869 — 284 3 3,587 — Total commercial 12,424 97 18,970 170 12,144 441 26,316 606 Inventory finance 1,255 62 333 35 1,037 136 332 69 Auto finance 4,878 — 2,241 — 4,592 — 1,757 — Total impaired loans without an allowance recorded 32,097 442 30,915 495 31,786 1,705 38,053 1,388 Total impaired loans $ 171,504 $ 1,586 $ 230,973 $ 2,260 $ 191,934 $ 5,425 $ 233,623 $ 6,507

Investments in Afforable Housin

Investments in Afforable Housing Limited Liability Entities	9 Months Ended
	Sep. 30, 2017
Equity Method Investments and Joint Ventures [Abstract]
Investment in affordable housing limited liability entities	Investments in Affordable Housing Limited Liability Entities Investments in affordable housing limited liability entities and unfunded commitments were as follows: (In thousands) At September 30, 2017 At December 31, 2016 Investments in affordable housing limited liability entities $ 76,034 $ 30,279 Accrued expenses and other liabilities - unfunded commitments 39,782 12,082 Tax credits and other tax benefits of $3.6 million and $7.5 million were recorded in income tax expense for the third quarter and first nine months of 2017 , respectively, compared with $1.6 million and $5.5 million for the same periods in 2016 .

Goodwill and Other Intangibles

Goodwill and Other Intangibles	9 Months Ended
	Sep. 30, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Other Intangible Assets	Goodwill and Other Intangible Assets Goodwill and other intangible assets were as follows: At September 30, 2017 At December 31, 2016 (In thousands) Gross Amount Accumulated Amortization Net Amount Gross Amount Accumulated Amortization Net Amount Unamortizable intangible assets: Goodwill related to consumer banking segment $ 214,286 $ 214,286 $ 214,286 $ 214,286 Goodwill related to wholesale banking segment 13,512 13,512 11,354 11,354 Total $ 227,798 $ 227,798 $ 225,640 $ 225,640 Amortizable intangible assets: Program agreement $ 14,700 $ 26 $ 14,674 $ — $ — $ — Non-compete agreement 10,590 5,155 5,435 4,590 4,590 — Customer base intangibles 3,330 2,407 923 2,730 2,002 728 Deposit base intangibles 3,049 2,234 815 3,049 2,069 980 Tradename 300 300 — 300 300 — Total $ 31,969 $ 10,122 $ 21,847 $ 10,669 $ 8,961 $ 1,708 On June 16, 2017, TCF Bank acquired 100% of the outstanding shares of Equipment Financing & Leasing Corporation ("EFLC"). EFLC provides operating leases and direct financing leases of material handling equipment primarily to Fortune 500 customers. TCF Bank paid $9.0 million in cash upon closing, recorded a liability of $5.9 million to be paid within three years and assumed $64.2 million of EFLC's debt that was subsequently paid off. Assets acquired consisted of $46.4 million of operating lease equipment, $5.9 million of direct financing leases, $21.3 million of amortizable intangible assets, $2.2 million related to goodwill and approximately $3.3 million of cash, other assets and other liabilities, net. All of the goodwill relates to the wholesale banking segment. The weighted-average amortization periods of the acquired program agreement, non-compete agreement and customer base intangibles were 15 years, five years and three years, respectively. The amortizable intangible assets are amortized on an expected benefit basis over their estimated useful lives. Amortization expense for intangible assets was $0.8 million and $1.2 million for the third quarter and first nine months of 2017 , respectively, compared with $0.4 million and $1.1 million for the same periods in 2016 . There was no impairment of goodwill or the intangible assets during the third quarter and first nine months of 2017 and 2016 . Amortization expense for intangible assets is estimated to be $0.8 million for the remainder of 2017 , $2.7 million for 2018 , $2.3 million for 2019 , $2.0 million for 2020 and $2.0 million for 2021 .

Long-term Borrowings

Long-term Borrowings	9 Months Ended
	Sep. 30, 2017
Debt Disclosure [Abstract]
Long-term Borrowings	Long-term Borrowings Long-term borrowings were as follows: At September 30, 2017 At December 31, 2016 (Dollars in thousands) Stated Maturity Amount Stated Rate Amount Stated Rate Federal Home Loan Bank advances 2018 $ — — $ 375,000 0.72 % - 0.81 % 2019 1,000,000 1.35 % - 1.39 % 300,000 0.78 - 0.81 Subtotal 1,000,000 675,000 Subordinated bank notes 2022 108,813 6.25 108,654 6.25 2025 148,200 4.60 148,052 4.60 Hedge-related basis adjustment (1) (748 ) (1,349 ) Subtotal 256,265 255,357 Discounted lease rentals 2017 15,221 2.81 - 6.88 57,081 2.45 - 7.88 2018 50,332 2.55 - 7.95 42,132 2.55 - 7.95 2019 32,680 2.53 - 6.00 24,671 2.53 - 6.00 2020 17,601 2.64 - 6.00 11,753 2.64 - 6.90 2021 8,733 2.88 - 5.00 4,423 2.88 - 4.57 2022 1,756 3.04 - 5.24 — — Subtotal 126,323 140,060 Other long-term borrowings 2017 — — 2,764 1.36 Total long-term borrowings $ 1,382,588 $ 1,073,181 (1) Related to subordinated bank notes with a stated maturity of 2025. At September 30, 2017 , TCF Bank had pledged loans secured by consumer and commercial real estate and Federal Home Loan Bank ("FHLB") stock with an aggregate carrying value of $4.4 billion as collateral for FHLB advances. At September 30, 2017 , $1.0 billion of the FHLB advances outstanding were prepayable at TCF's option.

Equity

Equity	9 Months Ended
	Sep. 30, 2017
Equity [Abstract]
Equity	Equity Preferred stock was as follows: (In thousands) At September 30, 2017 At December 31, 2016 Series A non-cumulative perpetual preferred stock $ — $ 166,721 Series B non-cumulative perpetual preferred stock 96,519 96,519 Series C non-cumulative perpetual preferred stock 169,448 — Total preferred stock $ 265,967 $ 263,240 Depositary Shares Representing 7.50% Series A Non-Cumulative Perpetual Preferred Stock At September 30, 2017 and December 31, 2016 , TCF had 6,900,000 depositary shares outstanding each representing a 1/1000 th ownership interest in a share of the 7.50% Series A non-cumulative perpetual preferred stock, par value $0.01 per share, with a liquidation preference of $25,000 per share (equivalent to $25 per depositary share) (the "Series A Preferred Stock"). On September 15, 2017, TCF provided notice of its intent to redeem all outstanding shares of its Series A Preferred Stock and the related depositary shares during the fourth quarter of 2017. As a result, TCF reclassified the outstanding liquidation preference amount of the Series A Preferred Stock totaling $172.5 million from preferred stock to accrued expenses and other liabilities on the Consolidated Statement of Financial Condition because upon the notification date, the Series A Preferred Stock became mandatorily redeemable. The liquidation preference amount equals the redemption price for all outstanding shares of the Series A Preferred Stock. Deferred stock issuance costs of $5.8 million originally recorded as a reduction to preferred stock upon the issuance of the Series A Preferred Stock were reclassified to retained earnings and resulted in a non-cash, one-time reduction to net income available to common stockholders utilized in the computation of earnings per common share and diluted earnings per common share for the third quarter and first nine months of 2017. Effective October 16, 2017, TCF redeemed all outstanding shares of its Series A Preferred Stock and the related depositary shares using the net proceeds from the offering of its Series C depositary shares and additional cash on hand. Dividends were payable on the Series A Preferred Stock if, as and when declared by TCF's Board of Directors on a non-cumulative basis on March 1, June 1, September 1 and December 1 of each year at a per annum rate of 7.50% . TCF paid cash dividends to holders of the Series A Preferred Stock of $3.2 million and $9.7 million , respectively, for the third quarter and first nine months of 2017 and 2016 . Dividends of $1.6 million on the Series A Preferred Stock were accrued for the period from September 1, 2017 through October 15, 2017. 6.45% Series B Non-Cumulative Perpetual Preferred Stock At September 30, 2017 and December 31, 2016 , TCF had 4,000,000 shares outstanding of the 6.45% Series B non-cumulative perpetual preferred stock, par value $0.01 per share, with a liquidation preference of $25 per share (the "Series B Preferred Stock"). Dividends are payable on the Series B Preferred Stock if, as and when declared by TCF's Board of Directors on a non-cumulative basis on March 1, June 1, September 1 and December 1 of each year at a per annum rate of 6.45% . TCF paid cash dividends to holders of the Series B Preferred Stock of $1.6 million and $4.8 million , respectively, for the third quarter and first nine months of 2017 and 2016 . The Series B Preferred Stock may be redeemed at TCF's option in whole or in part on or after December 19, 2017. Depositary Shares Representing 5.70% Series C Non-Cumulative Perpetual Preferred Stock On September 14, 2017, TCF completed the public offering of 7,000,000 depositary shares, each representing a 1/1000 th ownership interest in a share of the 5.70% Series C non-cumulative perpetual preferred stock, par value $0.01 per share, with a liquidation preference of $25,000 per share (equivalent to $25 per depositary share) (the "Series C Preferred Stock") for an aggregate public offering price of $175.0 million . Net proceeds of the offering to TCF, after deducting deferred stock issuance costs of $5.6 million , were $169.4 million . Dividends are payable on the Series C Preferred Stock if, as and when declared by TCF's Board of Directors on a non-cumulative basis on March 1, June 1, September 1 and December 1 of each year, commencing on December 1, 2017, at a per annum rate of 5.70% . The Series C Preferred Stock may be redeemed at TCF's option in whole or in part on December 1, 2022 or on any dividend payment date thereafter.

Regulatory Capital Requirements

Regulatory Capital Requirements	9 Months Ended
	Sep. 30, 2017
Regulatory Capital Requirements [Abstract]
Regulatory Capital Requirements	Regulatory Capital Requirements TCF and TCF Bank are subject to various regulatory capital requirements administered by the federal banking agencies. Failure to meet minimum capital requirements can initiate certain mandatory, and possible additional discretionary, actions by the federal banking agencies that could have a material adverse effect on TCF. In general, TCF Bank may not declare or pay a dividend to TCF Financial in excess of 100% of its net retained earnings for the current year combined with its net retained earnings for the preceding two calendar years, which was $462.7 million at September 30, 2017 , without prior approval of the Office of the Comptroller of the Currency ("OCC"). The OCC also has the authority to prohibit the payment of dividends by a national bank when it determines such payments would constitute an unsafe and unsound banking practice. TCF Bank's ability to make capital distributions in the future may require regulatory approval and may be restricted by its regulatory authorities. TCF Bank's ability to make any such distributions will also depend on its earnings and ability to meet minimum regulatory capital requirements in effect during future periods. In the future, these capital adequacy standards may be higher than existing minimum regulatory capital requirements. Regulatory capital information for TCF and TCF Bank was as follows: TCF TCF Bank At September 30, At December 31, At September 30, At December 31, Well-capitalized Standard Minimum Capital Requirement (1) (Dollars in thousands) 2017 2016 2017 2016 Regulatory Capital: Common equity Tier 1 capital $ 2,080,729 $ 1,970,323 $ 2,267,884 $ 2,144,966 Tier 1 capital 2,362,926 2,248,221 2,287,790 2,162,128 Total capital 2,734,260 2,635,925 2,695,379 2,583,512 Regulatory Capital Ratios: Common equity Tier 1 capital ratio 10.05 % 10.24 % 10.96 % 11.14 % 6.50 % 4.50 % Tier 1 risk-based capital ratio 11.41 11.68 11.05 11.23 8.00 6.00 Total risk-based capital ratio 13.21 13.69 13.02 13.42 10.00 8.00 Tier 1 leverage ratio 10.88 10.73 10.53 10.32 5.00 4.00 (1) Excludes capital conservation buffer of 1.25% and 0.625% as of September 30, 2017 and December 31, 2016 .

Stock Compensation

Stock Compensation	9 Months Ended
	Sep. 30, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock Compensation	Stock Compensation TCF's restricted stock award and stock option transactions under the TCF Financial 2015 Omnibus Incentive Plan ("Omnibus Incentive Plan") and the TCF Financial Incentive Stock Program ("Incentive Stock Program") during the nine months ended September 30, 2017 were as follows: Restricted Stock Awards Stock Options Shares Grant Date Fair Value Range Weighted- average Grant Date Fair Value Shares Weighted- average Remaining Contractual Life in Years Weighted- average Exercise Price Outstanding at December 31, 2016 3,536,175 $ 7.73 - $ 16.28 $ 12.81 404,000 1.06 $ 15.75 Granted 510,371 13.96 - 18.58 16.19 — — — Exercised — — - — — (38,000 ) — 15.75 Forfeited/canceled (485,670 ) 7.73 - 15.87 10.93 — — — Vested (898,680 ) 9.36 - 16.02 13.65 — — — Outstanding at September 30, 2017 2,662,196 7.73 - 18.58 13.52 366,000 0.31 15.75 Exercisable at September 30, 2017 N.A. N.A. 366,000 15.75 N.A. Not Applicable. At September 30, 2017 , there were 350,000 shares of performance-based restricted stock awards outstanding that will vest only if certain performance goals and service conditions are achieved. Failure to achieve the performance goals and service conditions will result in all or a portion of the shares being forfeited. Unrecognized stock compensation expense for restricted stock awards was $22.6 million with a weighted-average remaining amortization period of 1.8 years at September 30, 2017 . At September 30, 2017 , there were 360,988 performance-based restricted stock units granted under the Omnibus Incentive Plan that will vest only if certain performance goals are achieved. The number of restricted stock units granted was at target and the actual restricted stock units granted will depend on actual performance with a maximum total payout of 150% of target. Failure to achieve the performance goals will result in all or a portion of the restricted stock units being forfeited. None of the performance-based restricted stock units have vested. The remaining weighted-average performance period of the restricted stock units was 2.0 years at September 30, 2017 . Compensation expense for restricted stock awards and restricted stock units was $2.4 million and $6.5 million for the third quarter and first nine months of 2017 , respectively, compared with $2.0 million and $6.8 million for the same periods in 2016 . The valuation assumptions for stock options granted in 2008 under the Incentive Stock Program have not changed significantly from December 31, 2016 and no stock options have subsequently been granted under the Incentive Stock Program. TCF also has the ability to grant stock options under the Omnibus Incentive Plan. As of September 30, 2017 , no stock options had been granted under the Omnibus Incentive Plan.

Employee Benefit Plans

Employee Benefit Plans	9 Months Ended
	Sep. 30, 2017
Retirement Benefits [Abstract]
Employee Benefit Plans	Employee Benefit Plans The net periodic benefit plan (income) cost included in compensation and employee benefits expense for the TCF Cash Balance Pension Plan (the "Pension Plan") and health care benefits for eligible retired employees (the "Postretirement Plan") were as follows: Pension Plan Quarter Ended September 30, Nine Months Ended September 30, (In thousands) 2017 2016 2017 2016 Interest cost $ 284 $ 321 $ 854 $ 961 (Gain) loss on plan assets (142 ) (147 ) (426 ) (440 ) Net periodic benefit plan (income) cost $ 142 $ 174 $ 428 $ 521 Postretirement Plan Quarter Ended September 30, Nine Months Ended September 30, (In thousands) 2017 2016 2017 2016 Interest cost $ 33 $ 37 $ 100 $ 113 Amortization of prior service cost (12 ) (12 ) (35 ) (35 ) Net periodic benefit plan (income) cost $ 21 $ 25 $ 65 $ 78 TCF made no cash contributions to the Pension Plan in either of the nine months ended September 30, 2017 or 2016 . During the third quarter and first nine months of 2017 , TCF contributed $0.1 million and $0.2 million , respectively, to the Postretirement Plan compared with $0.1 million and $0.3 million for the same periods in 2016 .

Derivative Instruments

Derivative Instruments	9 Months Ended
	Sep. 30, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Instruments	Derivative Instruments Derivative instruments were as follows: At September 30, 2017 (In thousands) Notional Amount Gross Amounts Recognized Gross Amounts Offset Net Amount Presented Derivative Assets: Derivatives designated as hedges: Forward foreign exchange contracts $ 75,539 $ 2,180 $ (2,180 ) $ — Derivatives not designated as hedges: Forward foreign exchange contracts 397,903 6,044 (4,817 ) 1,227 Interest rate contracts 445,711 2,763 (91 ) 2,672 Interest rate lock commitments 33,763 489 — 489 Total derivative assets $ 11,476 $ (7,088 ) $ 4,388 Derivative Liabilities: Derivatives designated as hedges: Interest rate contracts $ 150,000 $ 75 $ (75 ) $ — Derivatives not designated as hedges: Interest rate contracts 92,799 613 (16 ) 597 Other contracts 13,804 384 (384 ) — Interest rate lock commitments 313 3 — 3 Total derivative liabilities $ 1,075 $ (475 ) $ 600 At December 31, 2016 (In thousands) Notional Amount Gross Amounts Recognized Gross Amounts Offset Net Amount Presented Derivative Assets: Derivatives designated as hedges: Forward foreign exchange contracts $ 61,760 $ 1,082 $ — $ 1,082 Derivatives not designated as hedges: Forward foreign exchange contracts 250,018 2,995 (1,439 ) 1,556 Interest rate contracts 149,499 1,925 (633 ) 1,292 Interest rate lock commitments 27,954 318 — 318 Total derivative assets $ 6,320 $ (2,072 ) $ 4,248 Derivative Liabilities: Derivatives designated as hedges: Interest rate contracts $ 150,000 $ 1,320 $ (1,320 ) $ — Derivatives not designated as hedges: Forward foreign exchange contracts 115,336 469 (445 ) 24 Interest rate contracts 149,499 1,936 (1,332 ) 604 Other contracts 13,804 619 (619 ) — Interest rate lock commitments 2,947 21 — 21 Total derivative liabilities $ 4,365 $ (3,716 ) $ 649 The pre-tax impact of derivative activity within the Consolidated Statements of Income and the Consolidated Statements of Comprehensive Income was as follows: Quarter Ended September 30, Nine Months Ended September 30, (In thousands) Income Statement Location 2017 2016 2017 2016 Consolidated Statements of Income: Fair value hedges: Interest rate contracts Other non-interest income $ (135 ) $ (1,407 ) $ 813 $ 9,132 Non-derivative hedged items Other non-interest income 146 1,333 (601 ) (7,868 ) Not designated as hedges: Forward foreign exchange contracts Other non-interest expense (10,690 ) 5,979 (20,323 ) (23,459 ) Interest rate lock commitments Gains on sales of consumer real estate loans, net (29 ) (91 ) 189 146 Interest rate contracts Other non-interest income (155 ) 27 (263 ) (92 ) Other contracts Other non-interest expense — — — (319 ) Net gain (loss) recognized $ (10,863 ) $ 5,841 $ (20,185 ) $ (22,460 ) Consolidated Statements of Comprehensive Income: Net investment hedges: Forward foreign exchange contracts Other comprehensive income (loss) $ (2,714 ) $ 904 $ (5,073 ) $ (2,691 ) Net unrealized gain (loss) $ (2,714 ) $ 904 $ (5,073 ) $ (2,691 ) TCF executes all of its forward foreign exchange contracts in the over-the-counter market with large financial institutions pursuant to International Swaps and Derivatives Association, Inc. agreements. These agreements include credit risk-related features that enhance the creditworthiness of these instruments as compared with other obligations of the respective counterparty with whom TCF has transacted by requiring that additional collateral be posted under certain circumstances. The amount of collateral required depends on the contract and is determined daily based on market and currency exchange rate conditions. At September 30, 2017 , credit risk-related contingent features existed on forward foreign exchange contracts with a notional value of $56.1 million . In the event TCF is rated less than BB- by Standard and Poor's, the contracts could be terminated or TCF may be required to provide approximately $1.1 million in additional collateral. There were no forward foreign exchange contracts containing credit risk-related features in a net liability position at September 30, 2017 . At September 30, 2017 , TCF had posted $7.5 million and $1.4 million of cash collateral related to its interest rate contracts and other contracts, respectively, and received $7.0 million of cash collateral related to its forward foreign exchange contracts.

Fair Values Disclosures

Fair Values Disclosures	9 Months Ended
	Sep. 30, 2017
Fair Value Disclosures [Abstract]
Fair Value Disclosures	Fair Value Disclosures TCF uses fair value measurements to record fair value adjustments to certain assets and liabilities and to determine fair value disclosures. The Company's fair values are based on the price that would be received upon the sale of an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. Securities available for sale, certain loans held for sale, interest-only strips, forward foreign exchange contracts, interest rate contracts, interest rate lock commitments, forward loan sales commitments, assets and liabilities held in trust for deferred compensation plans and other contracts are recorded at fair value on a recurring basis. From time to time we may be required to record at fair value other assets on a non-recurring basis, such as certain securities held to maturity, loans, other real estate owned, repossessed and returned assets and the securitization receivable. These non-recurring fair value adjustments typically involve application of lower of cost or fair value accounting or write-downs of individual assets. TCF groups its assets and liabilities measured at fair value in three levels, based on the markets in which the assets and liabilities are traded and the degree and reliability of estimates and assumptions used to determine fair value as follows: Level 1, which includes valuations that are based on prices obtained from independent pricing sources for the same instruments traded in active markets; Level 2, which includes valuations that are based on prices obtained from independent pricing sources that are based on observable transactions of similar instruments, but not quoted markets; and Level 3, for which valuations are generated from Company model-based techniques that use significant unobservable inputs. Such unobservable inputs reflect estimates of assumptions that market participants would use in pricing the asset or liability. The following is a discussion of the valuation methodologies used to record assets and liabilities at fair value on a recurring or non-recurring basis and for estimating fair value of financial instruments not recorded at fair value. Investments The carrying value of investments in FHLB stock and Federal Reserve Bank stock, categorized as Level 2, approximates fair value based on redemption at par value. Securities Held to Maturity Securities held to maturity consist primarily of securities of U.S. Government sponsored enterprises and federal agencies. The fair value of securities of U.S. Government sponsored enterprises and federal agencies, categorized as Level 2, is estimated using prices obtained from independent asset pricing services that are based on observable transactions, but not quoted markets. Management reviews the prices obtained from independent asset pricing services for unusual fluctuations and comparisons to current market trading activity. The fair value of other securities, categorized as Level 3, is estimated using probability of loss based on risk rating definitions. There is no observable secondary market for these securities. Securities Available for Sale Securities available for sale consist primarily of securities of U.S. Government sponsored enterprises and federal agencies, and obligations of states and political subdivisions. The fair value of these securities, categorized as Level 2, is recorded using prices obtained from independent asset pricing services that are based on observable transactions, but not quoted markets. Management reviews the prices obtained from independent asset pricing services for unusual fluctuations and comparisons to current market trading activity. Loans Held for Sale Loans held for sale are generally carried at the lower of cost or fair value. Estimated fair values are based on recent loan sale transactions and any available price quotes on loans with similar coupons, maturities and credit quality. Certain other loans held for sale are recorded at fair value under the elected fair value option. TCF relies on internal valuation models which utilize quoted investor prices to estimate the fair value of these loans. Loans held for sale are categorized as Level 3. Loans The fair value of loans, categorized as Level 3, is estimated based on discounted expected cash flows and recent sales of similar loans. The discounted cash flows include assumptions for prepayment estimates over each loan's remaining life, consideration of the current interest rate environment compared with the weighted-average rate of each portfolio, a credit risk component based on the historical and expected performance of each portfolio and a liquidity adjustment related to the current market environment. TCF also uses pricing data from recent sales of loans with similar risk characteristics as data points to validate the assumptions used in estimating the fair value of certain loans. Loans for which repayment is expected to be provided solely by the value of the underlying collateral, categorized as Level 3 and recorded at fair value on a non-recurring basis, are valued based on the fair value of that collateral less estimated selling costs. Such loans include non-accrual impaired loans as well as certain delinquent non-accrual consumer real estate and auto finance loans. The fair value of the collateral is determined based on internal estimates and assessments provided by third-party appraisers. Interest-only Strips The fair value of interest-only strips, categorized as Level 3, represents the present value of future cash flows expected to be received by TCF on certain assets. TCF uses available market data, along with its own empirical data and discounted cash flow models, to arrive at the estimated fair value of its interest-only strips. The present value of the estimated expected future cash flows to be received is determined by using discount, loss and prepayment rates that TCF believes are commensurate with the risks associated with the cash flows and what a market participant would use. These assumptions are inherently subject to volatility and uncertainty and, as a result, the estimated fair value of the interest-only strips may fluctuate significantly from period to period. Forward Foreign Exchange Contracts TCF's forward foreign exchange contracts are currency contracts executed in over-the-counter markets and are recorded at fair value using a cash flow model that includes key inputs such as foreign exchange rates and an assessment of the risk of counterparty non-performance. The risk of counterparty non-performance is based on external assessments of credit risk. The fair value of these contracts, categorized as Level 2, is based on observable transactions, but not quoted markets. Interest Rate Contracts TCF executes interest rate swap agreements with commercial banking customers to facilitate the customer's risk management strategy. These interest rate swaps are simultaneously hedged by offsetting interest rate swaps TCF executes with a third party, minimizing TCF's net interest rate risk exposure resulting from such transactions. TCF also has an interest rate swap agreement to convert its $150.0 million of fixed-rate subordinated notes to floating rate debt. These derivative instruments are recorded at fair value. The fair value of these swap agreements, categorized as Level 2, is determined using a cash flow model which considers the forward curve, the discount curve and credit valuation adjustments related to counterparty and/or borrower non-performance risk. Interest Rate Lock Commitments and Forward Loan Sales Commitments TCF's interest rate lock commitments are derivative instruments that are carried at fair value. The related forward loan sales commitments to sell the resulting loans held for sale are also recorded at fair value under the elected fair value option. TCF relies on internal valuation models to estimate the fair value of these instruments. The valuation models utilize estimated rates of successful loan closings and quoted investor prices. While these models use both Level 2 and 3 inputs, TCF has determined that the inputs significant in the valuation of these commitments fall within Level 3 and therefore they are categorized as Level 3. Other Real Estate Owned and Repossessed and Returned Assets The fair value of other real estate owned, categorized as Level 3, is based on independent appraisals, real estate brokers' price opinions or automated valuation methods, less estimated selling costs. Certain properties require assumptions that are not observable in an active market in the determination of fair value. The fair value of repossessed and returned assets is based on available pricing guides, auction results or price opinions, less estimated selling costs. Assets acquired through foreclosure, repossession or returned to TCF are initially recorded at the lower of the loan or lease carrying amount or fair value less estimated selling costs at the time of transfer to other real estate owned or repossessed and returned assets. Other real estate owned at September 30, 2017 and December 31, 2016 was $26.4 million and $46.8 million , respectively. Repossessed and returned assets at September 30, 2017 and December 31, 2016 was $11.4 million and $10.0 million , respectively. Other real estate owned and repossessed and returned assets were written down $1.6 million and $5.0 million , which was included in foreclosed real estate and repossessed assets, net expense for the third quarter and first nine months of 2017 , respectively, compared with $2.0 million and $7.0 million for the same periods in 2016 . Securitization Receivable TCF executed an auto finance loan securitization during the second quarter of 2016 with a related receivable representing a cash reserve account posted at the inception of the securitization. The fair value of the securitization receivable, categorized as Level 3, is estimated based on discounted cash flows using interest rates for borrowings of similar remaining maturities plus a spread based on management's judgment. Assets and Liabilities Held in Trust for Deferred Compensation Plans Assets held in trust for deferred compensation plans include investments in publicly traded securities, excluding TCF common stock reported in treasury and other equity, and U.S. Treasury notes. The fair value of these assets, categorized as Level 1, is based on prices obtained from independent asset pricing services based on active markets. The fair value of the liabilities equals the fair value of the assets. Other Contracts TCF has a swap agreement related to the sale of TCF's Visa Class B stock, categorized as Level 3. The fair value of the swap agreement is based on TCF's estimated exposure related to the Visa covered litigation through a probability analysis of the funding and estimated settlement amounts. Deposits The fair value of checking, savings and money market deposits, categorized as Level 1, is deemed equal to the amount payable on demand. The fair value of certificates of deposit, categorized as Level 2, is estimated based on discounted cash flows using currently offered market rates. The intangible value of long-term relationships with depositors is not taken into account in the fair values disclosed. Long-term Borrowings The fair value of TCF's long-term borrowings, categorized as Level 2, is estimated based on observable market prices and discounted cash flows using interest rates for borrowings of similar remaining maturities and characteristics. The fair value of other long-term borrowings, categorized as Level 3, is based on unobservable inputs determined at the time of origination. Financial Instruments with Off-Balance Sheet Risk The fair value of TCF's commitments to extend credit and standby letters of credit, categorized as Level 2, is estimated using fees currently charged to enter into similar agreements. Substantially all commitments to extend credit and standby letters of credit have floating interest rates and do not expose TCF to interest rate risk; therefore fair value is approximately equal to carrying value. The balances of assets and liabilities measured at fair value on a recurring and non-recurring basis were as follows: Fair Value Measurements at September 30, 2017 (In thousands) Level 1 Level 2 Level 3 Total Recurring Fair Value Measurements: Securities available for sale: Mortgage-backed securities: U.S. Government sponsored enterprises and federal agencies $ — $ 830,621 $ — $ 830,621 Other — — 8 8 Obligations of states and political subdivisions — 767,534 — 767,534 Loans held for sale — — 4,193 4,193 Interest-only strips — — 23,797 23,797 Forward foreign exchange contracts (1) — 8,224 — 8,224 Interest rate contracts (1) — 2,763 — 2,763 Interest rate lock commitments (1) — — 489 489 Forward loan sales commitments — — 20 20 Assets held in trust for deferred compensation plans 27,217 — — 27,217 Total assets $ 27,217 $ 1,609,142 $ 28,507 $ 1,664,866 Interest rate contracts (1) $ — $ 688 $ — $ 688 Interest rate lock commitments (1) — — 3 3 Forward loan sales commitments — — 73 73 Liabilities held in trust for deferred compensation plans 27,217 — — 27,217 Other contracts (1) — — 384 384 Total liabilities $ 27,217 $ 688 $ 460 $ 28,365 Non-recurring Fair Value Measurements: Loans $ — $ — $ 74,097 $ 74,097 Other real estate owned: Consumer — — 15,703 15,703 Commercial — — 3,451 3,451 Repossessed and returned assets — 3,734 3,258 6,992 Total non-recurring fair value measurements $ — $ 3,734 $ 96,509 $ 100,243 (1) As permitted under GAAP, TCF has elected to net derivative assets and derivative liabilities when a legally enforceable master netting agreement exists as well as the related cash collateral received and paid. For purposes of this table, the derivative assets and derivative liabilities are presented gross of this netting adjustment. Fair Value Measurements at December 31, 2016 (In thousands) Level 1 Level 2 Level 3 Total Recurring Fair Value Measurements: Securities available for sale: Mortgage-backed securities: U.S. Government sponsored enterprises and federal agencies $ — $ 810,891 $ — $ 810,891 Other — — 18 18 Obligations of states and political subdivisions — 612,526 — 612,526 Loans held for sale — — 6,498 6,498 Interest-only strips — — 40,152 40,152 Forward foreign exchange contracts (1) — 4,077 — 4,077 Interest rate contracts (1) — 1,925 — 1,925 Interest rate lock commitments (1) — — 318 318 Forward loan sales commitments — — 374 374 Assets held in trust for deferred compensation plans 23,363 — — 23,363 Total assets $ 23,363 $ 1,429,419 $ 47,360 $ 1,500,142 Forward foreign exchange contracts (1) $ — $ 469 $ — $ 469 Interest rate contracts (1) — 3,256 — 3,256 Interest rate lock commitments (1) — — 21 21 Forward loan sales commitments — — 13 13 Liabilities held in trust for deferred compensation plans 23,363 — — 23,363 Other contracts (1) — — 619 619 Total liabilities $ 23,363 $ 3,725 $ 653 $ 27,741 Non-recurring Fair Value Measurements: Securities held to maturity $ — $ — $ 2,400 $ 2,400 Loans — — 113,954 113,954 Other real estate owned: Consumer — — 25,751 25,751 Commercial — — 3,874 3,874 Repossessed and returned assets — 2,767 2,800 5,567 Total non-recurring fair value measurements $ — $ 2,767 $ 148,779 $ 151,546 (1) As permitted under GAAP, TCF has elected to net derivative assets and derivative liabilities when a legally enforceable master netting agreement exists as well as the related cash collateral received and paid. For purposes of this table, the derivative assets and derivative liabilities are presented gross of this netting adjustment. Management assesses the appropriate classification of financial assets and liabilities within the fair value hierarchy by monitoring the level of available observable market information. Changes in markets or economic conditions, as well as changes to Company valuation models, may require the transfer of financial instruments from one fair value level to another. Such transfers, if any, are recorded at the fair values as of the beginning of the quarter in which the transfer occurred. TCF had no transfers in the nine months ended September 30, 2017 and 2016 . The changes in Level 3 assets and liabilities measured at fair value on a recurring basis were as follows: (In thousands) Securities Loans Interest-only Strips Interest Forward Other Contracts At or For the Quarter Ended September 30, 2017: Asset (liability) balance, beginning of period $ 11 $ 5,238 $ 32,582 $ 515 $ (67 ) $ (462 ) Total net gains (losses) included in: Net income — 17 1,110 (29 ) 14 — Other comprehensive income (loss) — — (1,063 ) — — — Sales — (59,308 ) — — — — Originations — 58,634 542 — — — Principal paydowns / settlements (3 ) (388 ) (9,374 ) — — 78 Asset (liability) balance, end of period $ 8 $ 4,193 $ 23,797 $ 486 $ (53 ) $ (384 ) At or For the Quarter Ended September 30, 2016: Asset (liability) balance, beginning of period $ 25 $ 7,565 $ 48,411 $ 953 $ (317 ) $ (466 ) Total net gains (losses) included in: Net income — (72 ) (819 ) (91 ) 121 — Other comprehensive income (loss) — — 784 — — — Sales — (95,901 ) — — — — Originations — 94,739 2,513 — — — Principal paydowns / settlements (3 ) — (7,744 ) — — 79 Asset (liability) balance, end of period $ 22 $ 6,331 $ 43,145 $ 862 $ (196 ) $ (387 ) (In thousands) Securities Available for Sale Loans Held for Sale Interest-only Strips Interest Rate Lock Commitments Forward Loan Sales Commitments Other Contracts At or For the Nine Months Ended September 30, 2017: Asset (liability) balance, beginning of period $ 18 $ 6,498 $ 40,152 $ 297 $ 361 $ (619 ) Total net gains (losses) included in: Net income — 155 3,323 189 (414 ) — Other comprehensive income (loss) — — (464 ) — — — Sales — (151,182 ) — — — — Originations — 149,118 2,458 — — — Principal paydowns / settlements (10 ) (396 ) (21,672 ) — — 235 Asset (liability) balance, end of period $ 8 $ 4,193 $ 23,797 $ 486 $ (53 ) $ (384 ) At or For the Nine Months Ended September 30, 2016: Asset (liability) balance, beginning of period $ 34 $ 10,568 $ 44,332 $ 716 $ 265 $ (305 ) Total net gains (losses) included in: Net income — 126 1,697 146 (461 ) (318 ) Other comprehensive income (loss) — — 784 — — — Sales — (257,641 ) — — — — Originations — 253,278 19,121 — — — Principal paydowns / settlements (12 ) — (22,789 ) — — 236 Asset (liability) balance, end of period $ 22 $ 6,331 $ 43,145 $ 862 $ (196 ) $ (387 ) Fair Value Option TCF Bank originates first mortgage lien loans in its primary banking markets and sells the loans through a correspondent relationship. TCF elected the fair value option for these loans. This election facilitates the offsetting of changes in fair values of the loans held for sale and the derivative financial instruments used to economically hedge them. The difference between the aggregate fair value and aggregate unpaid principal balance of these loans held for sale was as follows: (In thousands) At September 30, 2017 At December 31, 2016 Fair value carrying amount $ 4,193 $ 6,498 Aggregate unpaid principal amount 4,082 6,563 Fair value carrying amount less aggregate unpaid principal $ 111 $ (65 ) Differences between the fair value carrying amount and the aggregate unpaid principal balance include changes in fair value recorded at and subsequent to funding and gains and losses on the related loan commitment prior to funding. No loans recorded under the fair value option were delinquent or on non-accrual status at September 30, 2017 or December 31, 2016 . The net gain from initial measurement of the correspondent lending loans held for sale, any subsequent changes in fair value while the loans are outstanding and any actual adjustment to the gains realized upon sales of the loans totaled $1.3 million and $3.5 million for the third quarter and first nine months of 2017 , respectively, compared with $2.1 million and $5.9 million for the same periods in 2016 , and are included in gains on sales of consumer real estate loans, net. This amount excludes the impact from the interest rate lock commitments and forward loan sales commitments which are also included in gains on sales of consumer real estate loans, net. Disclosures About Fair Value of Financial Instruments Management discloses the estimated fair value of financial instruments, both assets and liabilities on and off the balance sheet, for which it is practicable to estimate fair value. These fair value estimates were made at September 30, 2017 and December 31, 2016 , based on relevant market information and information about the financial instruments. Fair value estimates are intended to represent the price at which an asset could be sold or a liability could be settled. However, given there is no active market or observable market transactions for many of the Company's financial instruments, the estimates of fair values are subjective in nature, involve uncertainties and include matters of significant judgment. Changes in assumptions could significantly affect the estimated values. The carrying amounts and estimated fair values of the Company's financial instruments, excluding short-term financial assets and liabilities as their carrying amounts approximate fair value, and excluding financial instruments recorded at fair value on a recurring basis, were as follows. This information represents only a portion of TCF's balance sheet and not the estimated value of the Company as a whole. Non-financial instruments such as the intangible value of TCF's branches and core deposits, leasing operations, goodwill, premises and equipment and the future revenues from TCF's customers are not reflected in this disclosure. Therefore, this information is of limited use in assessing the value of TCF. Carrying Amount Estimated Fair Value at September 30, 2017 (In thousands) Level 1 Level 2 Level 3 Total Financial instrument assets: Investments $ 87,690 $ — $ 87,690 $ — $ 87,690 Securities held to maturity 165,315 — 167,302 2,800 170,102 Loans held for sale 253,958 — — 261,023 261,023 Loans: Consumer real estate 4,930,812 — — 5,042,688 5,042,688 Commercial real estate 2,711,668 — — 2,672,585 2,672,585 Commercial business 778,012 — — 755,703 755,703 Equipment finance 2,263,723 — — 2,234,458 2,234,458 Inventory finance 2,576,077 — — 2,560,652 2,560,652 Auto finance 3,240,413 — — 3,233,835 3,233,835 Other 20,439 — — 20,104 20,104 Allowance for loan losses (1) (168,244 ) — — — — Securitization receivable (2) 19,117 — — 18,489 18,489 Total financial instrument assets $ 16,878,980 $ — $ 254,992 $ 16,802,337 $ 17,057,329 Financial instrument liabilities: Deposits $ 18,107,486 $ 13,135,428 $ 5,004,242 $ — $ 18,139,670 Long-term borrowings 1,382,588 — 1,390,859 — 1,390,859 Total financial instrument liabilities $ 19,490,074 $ 13,135,428 $ 6,395,101 $ — $ 19,530,529 Financial instruments with off-balance sheet risk: (3) Commitments to extend credit $ 20,353 $ — $ 20,353 $ — $ 20,353 Standby letters of credit (59 ) — (59 ) — (59 ) Total financial instruments with off-balance sheet risk $ 20,294 $ — $ 20,294 $ — $ 20,294 (1) Expected credit losses are included in the estimated fair values. (2) Carrying amounts are included in other assets. (3) Positive amounts represent assets, negative amounts represent liabilities. Carrying Amount Estimated Fair Value at December 31, 2016 (In thousands) Level 1 Level 2 Level 3 Total Financial instrument assets: Investments $ 74,714 $ — $ 74,714 $ — $ 74,714 Securities held to maturity 181,314 — 181,146 2,800 183,946 Loans held for sale 268,832 — — 282,786 282,786 Loans: Consumer real estate 5,084,352 — — 5,165,062 5,165,062 Commercial real estate 2,634,191 — — 2,583,775 2,583,775 Commercial business 652,287 — — 631,215 631,215 Equipment finance 2,016,732 — — 1,983,237 1,983,237 Inventory finance 2,470,175 — — 2,453,184 2,453,184 Auto finance 2,647,741 — — 2,656,266 2,656,266 Other 18,771 — — 17,780 17,780 Allowance for loan losses (1) (160,269 ) — — — — Securitization receivable (2) 18,835 — — 18,835 18,835 Total financial instrument assets $ 15,907,675 $ — $ 255,860 $ 15,794,940 $ 16,050,800 Financial instrument liabilities: Deposits $ 17,242,522 $ 13,150,099 $ 4,112,685 $ — $ 17,262,784 Long-term borrowings 1,073,181 — 1,073,875 2,764 1,076,639 Total financial instrument liabilities $ 18,315,703 $ 13,150,099 $ 5,186,560 $ 2,764 $ 18,339,423 Financial instruments with off-balance sheet risk: (3) Commitments to extend credit $ 21,681 $ — $ 21,681 $ — $ 21,681 Standby letters of credit (29 ) — (29 ) — (29 ) Total financial instruments with off-balance sheet risk $ 21,652 $ — $ 21,652 $ — $ 21,652 (1) Expected credit losses are included in the estimated fair values. (2) Carrying amounts are included in other assets. (3) Positive amounts represent assets, negative amounts represent liabilities.

Earnings Per Common Share

Earnings Per Common Share	9 Months Ended
	Sep. 30, 2017
Earnings Per Share [Abstract]
Earnings Per Common Share	Earnings Per Common Share The computations of basic and diluted earnings per common share were as follows: Quarter Ended September 30, Nine Months Ended September 30, (Dollars in thousands, except per share data) 2017 2016 2017 2016 Basic Earnings Per Common Share: Net income attributable to TCF Financial Corporation $ 60,528 $ 56,292 $ 167,238 $ 162,032 Preferred stock dividends 6,464 4,847 16,158 14,541 Impact of notice to redeem preferred stock (1) 5,779 — 5,779 — Net income available to common stockholders 48,285 51,445 145,301 147,491 Less: Earnings allocated to participating securities 8 13 25 38 Earnings allocated to common stock $ 48,277 $ 51,432 $ 145,276 $ 147,453 Weighted-average common shares outstanding for basic earnings per common share 168,970,543 167,366,069 168,492,877 167,155,393 Basic earnings per common share $ 0.29 $ 0.31 $ 0.86 $ 0.88 Diluted Earnings Per Common Share: Earnings allocated to common stock $ 48,277 $ 51,432 $ 145,276 $ 147,453 Weighted-average common shares outstanding used in basic earnings per common share calculation 168,970,543 167,366,069 168,492,877 167,155,393 Net dilutive effect of: Non-participating restricted stock 269,394 516,083 312,297 478,641 Stock options 314 85,467 17,654 73,866 Weighted-average common shares outstanding for diluted earnings per common share 169,240,251 167,967,619 168,822,828 167,707,900 Diluted earnings per common share $ 0.29 $ 0.31 $ 0.86 $ 0.88 (1) Represents the amount of deferred stock issuance costs originally recorded in preferred stock upon the issuance of the Series A Preferred Stock that were reclassified to retained earnings on September 15, 2017, the date the Company announced its intent to redeem the outstanding Series A Preferred Stock. For the third quarter and first nine months of 2017 , there were 4.0 million and 4.1 million , respectively, of outstanding shares related to warrants and non-participating restricted stock that were not included in the computation of diluted earnings per share because they were anti-dilutive. For the third quarter and first nine months of 2016 , there were 5.1 million of outstanding shares related to warrants, non-participating restricted stock and stock options that were not included in the computation of diluted earnings per share because they were anti-dilutive.

Other Non-interest Expense

Other Non-interest Expense	9 Months Ended
	Sep. 30, 2017
Other Income and Expenses [Abstract]
Other Non-interest Expense	Other Non-interest Expense Other non-interest expense was as follows: Quarter Ended September 30, Nine Months Ended September 30, (In thousands) 2017 2016 2017 2016 Professional fees $ 9,875 $ 3,993 $ 26,295 $ 13,170 Advertising and marketing 6,060 5,488 19,678 17,053 Loan and lease processing 5,304 7,035 17,258 19,526 Outside processing 5,176 3,728 14,411 10,941 Card processing and issuance costs 4,719 3,952 13,534 11,634 FDIC insurance 4,181 4,082 11,964 11,946 Other 26,093 31,143 83,380 87,915 Total other non-interest expense $ 61,408 $ 59,421 $ 186,520 $ 172,185

Business Segments

Business Segments	9 Months Ended
	Sep. 30, 2017
Segment Reporting [Abstract]
Business Segments	Business Segments The Company's reportable segments are Consumer Banking, Wholesale Banking and Enterprise Services. Consumer Banking is comprised of all of the Company's consumer-facing businesses and includes retail banking, consumer real estate and auto finance. Wholesale Banking is comprised of commercial real estate and business lending, leasing and equipment finance and inventory finance. Enterprise Services is comprised of (i) corporate treasury, which includes TCF's investment and borrowing portfolios and management of capital, debt and market risks; (ii) corporate functions, such as information technology, risk and credit management, bank operations, finance, investor relations, corporate development, legal and human resources, that provide services to the operating segments; (iii) the Holding Company; and (iv) eliminations. TCF evaluates performance and allocates resources based on each reportable segment's net income or loss. The reportable business segments follow GAAP as described in Note 1 , Basis of Presentation , in Item 8 of TCF's 2016 Annual Report on Form 10-K, except for the accounting for intercompany interest income and interest expense, which are eliminated in consolidation, and presenting net interest income on a fully tax-equivalent basis. TCF generally accounts for inter-segment sales and transfers at cost. Certain information for each of TCF's reportable segments, including reconciliations of TCF's consolidated totals, was as follows: (In thousands) Consumer Banking Wholesale Banking Enterprise Services Consolidated At or For the Quarter Ended September 30, 2017: Net interest income $ 145,361 $ 88,941 $ (199 ) $ 234,103 Provision for credit losses 11,129 3,416 — 14,545 Non-interest income 70,934 38,272 24 109,230 Non-interest expense 164,062 70,184 789 235,035 Income tax expense (benefit) 14,370 17,153 (819 ) 30,704 Income (loss) after income tax expense (benefit) 26,734 36,460 (145 ) 63,049 Income attributable to non-controlling interest — 2,521 — 2,521 Preferred stock dividends — — 6,464 6,464 Impact of notice to redeem preferred stock — — 5,779 5,779 Net income (loss) available to common stockholders $ 26,734 $ 33,939 $ (12,388 ) $ 48,285 Total assets $ 9,025,172 $ 11,274,153 $ 2,705,713 $ 23,005,038 Revenues from external customers: Interest income $ 116,296 $ 130,618 $ 10,691 $ 257,605 Non-interest income 70,934 38,272 24 109,230 Total $ 187,230 $ 168,890 $ 10,715 $ 366,835 At or For the Quarter Ended September 30, 2016: Net interest income $ 140,887 $ 85,721 $ (14,590 ) $ 212,018 Provision for credit losses 10,720 3,174 — 13,894 Non-interest income 89,373 30,393 (92 ) 119,674 Non-interest expense 165,668 61,382 1,828 228,878 Income tax expense (benefit) 19,367 17,355 (6,465 ) 30,257 Income (loss) after income tax expense (benefit) 34,505 34,203 (10,045 ) 58,663 Income attributable to non-controlling interest — 2,371 — 2,371 Preferred stock dividends — — 4,847 4,847 Net income (loss) available to common stockholders $ 34,505 $ 31,832 $ (14,892 ) $ 51,445 Total assets $ 8,759,858 $ 9,902,952 $ 2,421,346 $ 21,084,156 Revenues from external customers: Interest income $ 111,107 $ 112,834 $ 8,785 $ 232,726 Non-interest income 89,373 30,393 (92 ) 119,674 Total $ 200,480 $ 143,227 $ 8,693 $ 352,400 (In thousands) Consumer Banking Wholesale Banking Enterprise Services Consolidated At or For the Nine Months Ended September 30, 2017: Net interest income $ 428,782 $ 264,749 $ (10,153 ) $ 683,378 Provision for credit losses 33,211 12,973 — 46,184 Non-interest income 215,154 111,930 323 327,407 Non-interest expense 494,449 202,687 14,992 712,128 Income tax expense (benefit) 41,133 52,760 (16,552 ) 77,341 Income (loss) after income tax expense (benefit) 75,143 108,259 (8,270 ) 175,132 Income attributable to non-controlling interest — 7,894 — 7,894 Preferred stock dividends — — 16,158 16,158 Impact of notice to redeem preferred stock — — 5,779 5,779 Net income (loss) available to common stockholders $ 75,143 $ 100,365 $ (30,207 ) $ 145,301 Total assets $ 9,025,172 $ 11,274,153 $ 2,705,713 $ 23,005,038 Revenues from external customers: Interest income $ 337,343 $ 380,210 $ 30,876 $ 748,429 Non-interest income 215,154 111,930 323 327,407 Total $ 552,497 $ 492,140 $ 31,199 $ 1,075,836 At or For the Nine Months Ended September 30, 2016: Net interest income $ 420,886 $ 257,917 $ (42,143 ) $ 636,660 Provision for credit losses 36,278 9,708 — 45,986 Non-interest income 254,130 94,794 1,308 350,232 Non-interest expense 491,632 184,217 8,679 684,528 Income tax expense (benefit) 52,824 52,866 (18,924 ) 86,766 Income (loss) after income tax expense (benefit) 94,282 105,920 (30,590 ) 169,612 Income attributable to non-controlling interest — 7,580 — 7,580 Preferred stock dividends — — 14,541 14,541 Net income (loss) available to common stockholders $ 94,282 $ 98,340 $ (45,131 ) $ 147,491 Total assets $ 8,759,858 $ 9,902,952 $ 2,421,346 $ 21,084,156 Revenues from external customers: Interest income $ 336,176 $ 338,461 $ 24,435 $ 699,072 Non-interest income 254,130 94,794 1,308 350,232 Total $ 590,306 $ 433,255 $ 25,743 $ 1,049,304

Litigation Contingencies

Litigation Contingencies	9 Months Ended
	Sep. 30, 2017
Commitments and Contingencies Disclosure [Abstract]
Litigation Contingencies	Litigation Contingencies From time to time TCF is a party to legal proceedings arising out of its lending, leasing and deposit operations, including foreclosure proceedings and other collection actions as part of its lending and leasing collections activities. TCF may also be subject to regulatory examinations and enforcement actions brought by federal regulators, including the Securities and Exchange Commission, the Federal Reserve, the OCC and the Consumer Financial Protection Bureau ("CFPB") and TCF's regulatory authorities may impose sanctions on TCF for failures related to regulatory compliance. From time to time borrowers and other customers, and employees and former employees have also brought actions against TCF, in some cases claiming substantial damages. TCF and other financial services companies are subject to the risk of class action litigation. Litigation is often unpredictable and the actual results of litigation cannot be determined and therefore the ultimate resolution of a matter and the possible range of loss associated with certain potential outcomes cannot be established. Except as discussed below, based on our current understanding of TCF's pending legal proceedings, management does not believe that judgments or settlements arising from pending or threatened legal matters, individually or in the aggregate, would have a material adverse effect on the consolidated financial position, operating results or cash flows of TCF. On January 19, 2017, the CFPB filed a civil lawsuit against TCF Bank in the United States District Court for the District of Minnesota (the "Court"), captioned Consumer Financial Protection Bureau v. TCF National Bank, alleging violations of the Consumer Financial Protection Act ("CFPA") and Regulation E, §1005.17 in connection with TCF Bank's practices administering checking account overdraft program "opt-in" requirements from 2010 to early 2014. In its complaint, the CFPB seeks, among other relief, redress for consumers, injunctive relief and unspecified penalties. On September 8, 2017, the Court issued a ruling on the motion made by TCF Bank to dismiss the complaint of the CFPB. In its ruling, the Court granted TCF Bank's motion to dismiss the CFPB's Regulation E claims and also dismissed the CFPB's unfair, deceptive and abusive conduct claims under the CFPA for periods prior to July 21, 2011. The Court did not grant TCF Bank's motion to dismiss CFPA claims for periods on or after July 21, 2011. TCF Bank rejects the claims made by the CFPB in its complaint and intends to vigorously defend against the CFPB's allegations. TCF has not accrued any amounts with respect to this matter because (i) TCF does not believe a loss is probable, (ii) TCF believes the Company has meritorious defenses to the claims made and (iii) the damages sought are unspecified and uncertain. Therefore, TCF is currently unable to reasonably estimate a range of potential loss, if any, relating to this matter. There is no assurance that the ultimate resolution of this lawsuit will not have a material adverse effect on the consolidated financial position, operating results or cash flows of TCF.

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income (Loss)	9 Months Ended
	Sep. 30, 2017
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Accumulated Other Comprehensive Income (Loss)	Accumulated Other Comprehensive Income (Loss) The components of other comprehensive income (loss) and the related tax effects were as follows: Quarter Ended September 30, 2017 2016 (In thousands) Before Tax Tax Effect Net of Tax Before Tax Tax Effect Net of Tax Net unrealized gains (losses) on securities available for sale and interest-only strips: Unrealized gains (losses) arising during the period $ 4,974 $ (1,892 ) $ 3,082 $ (7,624 ) $ 2,896 $ (4,728 ) Reclassification of net (gains) losses from accumulated other comprehensive income (loss) (1,028 ) 391 (637 ) 425 (161 ) 264 Net unrealized gains (losses) 3,946 (1,501 ) 2,445 (7,199 ) 2,735 (4,464 ) Net unrealized gains (losses) on net investment hedges (2,714 ) 1,032 (1,682 ) 904 (343 ) 561 Foreign currency translation adjustment (1) 2,939 — 2,939 (957 ) — (957 ) Recognized postretirement prior service cost: Reclassification of net (gains) losses from accumulated other comprehensive income (loss) (12 ) 4 (8 ) (12 ) 4 (8 ) Total other comprehensive income (loss) $ 4,159 $ (465 ) $ 3,694 $ (7,264 ) $ 2,396 $ (4,868 ) Nine Months Ended September 30, 2017 2016 (In thousands) Before Tax Tax Effect Net of Tax Before Tax Tax Effect Net of Tax Net unrealized gains (losses) on securities available for sale and interest-only strips: Unrealized gains (losses) arising during the period $ 28,562 $ (10,859 ) $ 17,703 $ 32,639 $ (12,396 ) $ 20,243 Reclassification of net (gains) losses from accumulated other comprehensive income (loss) (238 ) 90 (148 ) 1,448 (550 ) 898 Net unrealized gains (losses) 28,324 (10,769 ) 17,555 34,087 (12,946 ) 21,141 Net unrealized gains (losses) on net investment hedges (5,073 ) 1,929 (3,144 ) (2,691 ) 1,022 (1,669 ) Foreign currency translation adjustment (1) 5,527 — 5,527 2,791 — 2,791 Recognized postretirement prior service cost: Reclassification of net (gains) losses from accumulated other comprehensive income (loss) (35 ) 13 (22 ) (35 ) 13 (22 ) Total other comprehensive income (loss) $ 28,743 $ (8,827 ) $ 19,916 $ 34,152 $ (11,911 ) $ 22,241 (1) Foreign investments are deemed to be permanent in nature and therefore TCF does not provide for taxes on foreign currency translation adjustments. Reclassifications of net (gains) losses to net income for securities available for sale and interest-only strips were recorded in the Consolidated Statements of Income in interest income for those securities that were previously transferred to held to maturity and in other non-interest expense for interest-only strips. During 2014, TCF transferred $191.7 million of available for sale mortgage-backed securities to held to maturity. At September 30, 2017 and December 31, 2016 , the unrealized holding loss on the transferred securities retained in accumulated other comprehensive income (loss) totaled $12.3 million and $13.0 million , respectively. These amounts are amortized over the remaining lives of the transferred securities. See Note 12 , Employee Benefit Plans , for additional information regarding TCF's recognized postretirement prior service cost. The tax effect of these reclassifications was recorded in income tax expense in the Consolidated Statements of Income. The components of accumulated other comprehensive income (loss) were as follows: (In thousands) Securities Available for Sale and Interest-only Strips Net Investment Hedges Foreign Currency Translation Adjustment Recognized Postretirement Prior Service Cost Total At or For the Quarter Ended September 30, 2017: Balance, beginning of period $ (13,491 ) $ 5,031 $ (9,176 ) $ 133 $ (17,503 ) Other comprehensive income (loss) 3,082 (1,682 ) 2,939 — 4,339 Amounts reclassified from accumulated other comprehensive income (loss) (637 ) — — (8 ) (645 ) Net other comprehensive income (loss) 2,445 (1,682 ) 2,939 (8 ) 3,694 Balance, end of period $ (11,046 ) $ 3,349 $ (6,237 ) $ 125 $ (13,809 ) At or For the Quarter Ended September 30, 2016: Balance, beginning of period $ 15,898 $ 5,019 $ (9,316 ) $ 162 $ 11,763 Other comprehensive income (loss) (4,728 ) 561 (957 ) — (5,124 ) Amounts reclassified from accumulated other comprehensive income (loss) 264 — — (8 ) 256 Net other comprehensive income (loss) (4,464 ) 561 (957 ) (8 ) (4,868 ) Balance, end of period $ 11,434 $ 5,580 $ (10,273 ) $ 154 $ 6,895 (In thousands) Securities Available for Sale and Interest-only Strips Net Investment Hedges Foreign Currency Translation Adjustment Recognized Postretirement Prior Service Cost Total At or For the Nine Months Ended September 30, 2017: Balance, beginning of period $ (28,601 ) $ 6,493 $ (11,764 ) $ 147 $ (33,725 ) Other comprehensive income (loss) 17,703 (3,144 ) 5,527 — 20,086 Amounts reclassified from accumulated other comprehensive income (loss) (148 ) — — (22 ) (170 ) Net other comprehensive income (loss) 17,555 (3,144 ) 5,527 (22 ) 19,916 Balance, end of period $ (11,046 ) $ 3,349 $ (6,237 ) $ 125 $ (13,809 ) At or For the Nine Months Ended September 30, 2016: Balance, beginning of period $ (9,707 ) $ 7,249 $ (13,064 ) $ 176 $ (15,346 ) Other comprehensive income (loss) 20,243 (1,669 ) 2,791 — 21,365 Amounts reclassified from accumulated other comprehensive income (loss) 898 — — (22 ) 876 Net other comprehensive income (loss) 21,141 (1,669 ) 2,791 (22 ) 22,241 Balance, end of period $ 11,434 $ 5,580 $ (10,273 ) $ 154 $ 6,895

Basis of Presentation (Policies

Basis of Presentation (Policies)	9 Months Ended
	Sep. 30, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	TCF Financial Corporation (together with its direct and indirect subsidiaries, "we," "us," "our," "TCF" or the "Company"), a Delaware corporation, is a national bank holding company based in Wayzata, Minnesota. References herein to "TCF Financial" or the "Holding Company" refer to TCF Financial Corporation on an unconsolidated basis. TCF's principal subsidiary, TCF National Bank ("TCF Bank"), is headquartered in Sioux Falls, South Dakota. The accompanying unaudited consolidated financial statements have been prepared in accordance with the instructions to Form 10-Q and, therefore do not include all of the information and notes necessary for complete financial statements in conformity with U.S. generally accepted accounting principles ("GAAP"). The information in this Quarterly Report on Form 10-Q is written with the presumption that the users of the interim financial statements have read or have access to the Company's most recent Annual Report on Form 10-K, which contains the latest audited financial statements and notes thereto, together with Management's Discussion and Analysis of Financial Condition and Results of Operations at December 31, 2016 , and for the year then ended. All significant intercompany accounts and transactions have been eliminated in consolidation. Accounting policies in effect at December 31, 2016 remain significantly unchanged and have been followed similarly as in previous periods. The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, disclosure of contingent assets and liabilities at the date of the financial statements and the reported amount of revenues and expenses during the reporting period. These estimates are based on information available to management at the time the estimates are made. Actual results could differ from those estimates. In the opinion of management, the accompanying unaudited consolidated financial statements contain all the significant adjustments, consisting of normal recurring items, considered necessary for fair presentation. The results of operations for interim periods are not necessarily indicative of the results to be expected for the entire year.
New Accounting Pronouncements	During the second quarter of 2017, the Company adopted Accounting Standards Update ("ASU") No. 2017-08: Receivables - Nonrefundable Fees and Other Costs (Subtopic 310-20): Premium Amortization on Purchased Callable Debt Securities , which clarifies the premium amortization period on purchased callable debt securities should be to the earliest call date, rather than the contractual maturity date. The adoption of this ASU was on a modified retrospective basis and required any adjustments as a result of the adoption during an interim period to be reflected as of January 1, 2017. The adoption of this ASU did not impact results of operations, retained earnings or cash flows. Effective January 1, 2017, the Company adopted ASU No. 2016-09, Compensation - Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting , which simplified several aspects of the accounting for share-based payment transactions, including income tax consequences, classification of awards as either equity or liabilities and classification on the statement of cash flows. As a result of the adoption, the Company recorded a cumulative effect reduction to the opening balance of retained earnings of $1.3 million and a corresponding increase to additional paid-in capital. This cumulative effect adjustment to retained earnings was related to a policy election to account for forfeitures as they occur, thereby eliminating the need for an estimated forfeiture reserve against future cancellations. The adoption of this ASU on a prospective basis requires that tax benefits related to stock compensation be recorded to income tax expense, instead of to additional paid-in capital. The Company elected the prospective basis regarding the presentation of stock compensation tax (expense) benefit in the Consolidated Statement of Cash Flows as an operating activity, and as a result prior periods were not adjusted.

Securities Available for Sale28

Securities Available for Sale and Securities Held to Maturity (Tables)	9 Months Ended
	Sep. 30, 2017
Investments, Debt and Equity Securities [Abstract]
Schedule of securities	Securities were as follows: At September 30, 2017 At December 31, 2016 (In thousands) Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Securities available for sale: Mortgage-backed securities: U.S. Government sponsored enterprises and federal agencies $ 838,801 $ 1,040 $ 9,220 $ 830,621 $ 827,722 $ 423 $ 17,254 $ 810,891 Other 8 — — 8 18 — — 18 Obligations of states and political subdivisions 764,534 8,709 5,709 767,534 628,972 394 16,840 612,526 Total securities available for sale $ 1,603,343 $ 9,749 $ 14,929 $ 1,598,163 $ 1,456,712 $ 817 $ 34,094 $ 1,423,435 Securities held to maturity: Mortgage-backed securities: U.S. Government sponsored enterprises and federal agencies $ 162,515 $ 5,068 $ 281 $ 167,302 $ 178,514 $ 3,072 $ 440 $ 181,146 Other securities 2,800 — — 2,800 2,800 — — 2,800 Total securities held to maturity $ 165,315 $ 5,068 $ 281 $ 170,102 $ 181,314 $ 3,072 $ 440 $ 183,946
Schedule of gross unrealized losses and fair value of securities available for sale and securities held to maturity that are in a loss position	Gross unrealized losses and fair value of securities available for sale and securities held to maturity aggregated by investment category and the length of time the securities were in a continuous loss position were as follows: At September 30, 2017 Less than 12 months 12 months or more Total (In thousands) Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses Securities available for sale: Mortgage-backed securities: U.S. Government sponsored enterprises and federal agencies $ 405,892 $ 3,936 $ 207,494 $ 5,284 $ 613,386 $ 9,220 Obligations of states and political subdivisions 128,741 821 203,775 4,888 332,516 5,709 Total securities available for sale $ 534,633 $ 4,757 $ 411,269 $ 10,172 $ 945,902 $ 14,929 Securities held to maturity: Mortgage-backed securities: U.S. Government sponsored enterprises and federal agencies $ 17,988 $ 142 $ 4,808 $ 139 $ 22,796 $ 281 Total securities held to maturity $ 17,988 $ 142 $ 4,808 $ 139 $ 22,796 $ 281 At December 31, 2016 Less than 12 months 12 months or more Total (In thousands) Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses Securities available for sale: Mortgage-backed securities: U.S. Government sponsored enterprises and federal agencies $ 732,724 $ 17,254 $ — $ — $ 732,724 $ 17,254 Obligations of states and political subdivisions 501,620 16,840 — — 501,620 16,840 Total securities available for sale $ 1,234,344 $ 34,094 $ — $ — $ 1,234,344 $ 34,094 Securities held to maturity: Mortgage-backed securities: U.S. Government sponsored enterprises and federal agencies $ 27,090 $ 440 $ — $ — $ 27,090 $ 440 Total securities held to maturity $ 27,090 $ 440 $ — $ — $ 27,090 $ 440
Schedule of amortized cost and fair value of securities available for sale and securities held to maturity by contractual maturity	The amortized cost and fair value of securities available for sale and securities held to maturity by final contractual maturity were as follows. The remaining contractual principal maturities do not consider possible prepayments. Remaining expected maturities will differ from contractual maturities because borrowers may have the right to prepay. At September 30, 2017 At December 31, 2016 (In thousands) Amortized Cost Fair Value Amortized Cost Fair Value Securities available for sale: Due in one year or less $ 8 $ 8 $ 1 $ 1 Due in 1-5 years 9,547 9,757 18 18 Due in 5-10 years 448,223 453,761 331,430 329,005 Due after 10 years 1,145,565 1,134,637 1,125,263 1,094,411 Total securities available for sale $ 1,603,343 $ 1,598,163 $ 1,456,712 $ 1,423,435 Securities held to maturity: Due in one year or less $ 1,000 $ 1,000 $ — $ — Due in 1-5 years 400 400 1,400 1,400 Due in 5-10 years 1,400 1,400 1,400 1,400 Due after 10 years 162,515 167,302 178,514 181,146 Total securities held to maturity $ 165,315 $ 170,102 $ 181,314 $ 183,946
Interest income attributable to securities available for sale	Interest income attributable to securities available for sale was as follows: Quarter Ended Nine Months Ended September 30, (In thousands) 2017 2016 2017 2016 Taxable interest income $ 4,619 $ 4,167 $ 13,707 $ 11,838 Tax-exempt interest income 3,867 2,959 10,811 7,182 Total interest income $ 8,486 $ 7,126 $ 24,518 $ 19,020

Loans and Leases (Tables)

Loans and Leases (Tables)	9 Months Ended
	Sep. 30, 2017
Receivables [Abstract]
Information about loans and leases	Loans and leases were as follows: (In thousands) At September 30, 2017 At December 31, 2016 Consumer real estate: First mortgage lien $ 1,953,199 $ 2,292,596 Junior lien 2,977,613 2,791,756 Total consumer real estate 4,930,812 5,084,352 Commercial: Commercial real estate: Permanent 2,373,001 2,356,287 Construction and development 338,667 277,904 Total commercial real estate 2,711,668 2,634,191 Commercial business 778,012 652,287 Total commercial 3,489,680 3,286,478 Leasing and equipment finance 4,730,931 4,336,310 Inventory finance 2,576,077 2,470,175 Auto finance 3,240,413 2,647,741 Other 20,439 18,771 Total loans and leases (1) $ 18,988,352 $ 17,843,827 (1) Loans and leases are reported at historical cost including net direct fees and costs associated with originating and acquiring loans and leases, lease residuals, unearned income and unamortized purchase premiums and discounts. The aggregate amount of these loan and lease adjustments was $43.2 million and $54.1 million at September 30, 2017 and December 31, 2016 , respectively.
Loan sales transaction table	The following tables summarize the net sales proceeds for consumer real estate and auto finance loans sold, the securitization receivable recorded, the interest-only strips received, the recorded investment in loans sold, including accrued interest, and the net gains, as applicable. TCF generally retains servicing on loans sold. Included in consumer real estate loans sold in the third quarter and first nine months of 2017 were $21.8 million and $71.2 million , respectively, of non-accrual loans, which were sold servicing released. The auto finance securitizations included in the third quarter and first nine months of 2016 qualify for sale accounting and are executed by transferring the recorded investment to trusts. These trusts are considered variable interest entities due to their limited capitalization and special purpose nature. TCF has concluded it is not the primary beneficiary of the trusts and therefore, they are not consolidated. No servicing assets or liabilities related to consumer real estate or auto finance loans were recorded within TCF's Consolidated Statements of Financial Condition, as the contractual servicing fees are adequate to compensate TCF for its servicing responsibilities based on the amount demanded by the marketplace. Quarter Ended September 30, 2017 (In thousands) Consumer Real Estate Loans Auto Finance Loans Auto Finance Securitizations Total Auto Finance Loans Sales proceeds, net (1) $ 300,038 $ — $ — $ — Interest-only strips, initial value 542 — — — Recorded investment in loans sold, including accrued interest (292,267 ) — — — Net gains (2) $ 8,313 $ — $ — $ — Quarter Ended September 30, 2016 (In thousands) Consumer Real Estate Loans Auto Finance Loans Auto Finance Securitizations Total Auto Finance Loans Sales proceeds, net (1) $ 450,666 $ 105,766 $ 525,745 $ 631,511 Interest-only strips, initial value 2,513 — — — Recorded investment in loans sold, including accrued interest (438,900 ) (100,009 ) (519,315 ) (619,324 ) Net gains (2) $ 14,279 $ 5,757 $ 6,430 $ 12,187 Nine Months Ended September 30, 2017 (In thousands) Consumer Real Estate Loans Auto Finance Loans Auto Finance Securitizations Total Auto Finance Loans Sales proceeds, net (1) $ 971,755 $ 302,616 $ — $ 302,616 Interest-only strips, initial value 2,458 — — — Recorded investment in loans sold, including accrued interest (947,735 ) (298,581 ) — (298,581 ) Net gains (2) $ 26,478 $ 4,035 $ — $ 4,035 Nine Months Ended September 30, 2016 (In thousands) Consumer Real Estate Loans Auto Finance Loans Auto Finance Securitizations Total Auto Finance Loans Sales proceeds, net (1) $ 1,129,251 $ 688,227 $ 925,986 $ 1,614,213 Securitization receivable — — 18,620 18,620 Interest-only strips, initial value 13,426 5,695 — 5,695 Recorded investment in loans sold, including accrued interest (1,107,327 ) (669,775 ) (933,638 ) (1,603,413 ) Net gains (2) $ 35,350 $ 24,147 $ 10,968 $ 35,115 (1) Includes transaction fees and other sales related adjustments
Interest only strips and contractual liabilites	Total interest-only strips and the contractual liabilities related to loan sales were as follows: (In thousands) At September 30, 2017 At December 31, 2016 Interest-only strips attributable to: Consumer real estate loan sales $ 17,445 $ 27,260 Auto finance loan sales 6,352 12,892 Contractual liabilities attributable to: Consumer real estate loan sales $ 1,082 $ 701 Auto finance loan sales — 168

Allowance for Loan and Lease 30

Allowance for Loan and Lease Losses and Credit Quality Information (Tables)	9 Months Ended
	Sep. 30, 2017
Allowance for Loan and Lease Losses and Credit Quality Information
Rollforwards of the allowance for loan and lease losses	The rollforwards of the allowance for loan and lease losses were as follows: (In thousands) Consumer Commercial Leasing and Inventory Auto Other Total At or For the Quarter Ended September 30, 2017: Balance, beginning of period $ 52,408 $ 34,669 $ 21,922 $ 12,129 $ 43,893 $ 599 $ 165,620 Charge-offs (2,940 ) — (1,404 ) (750 ) (11,028 ) (1,877 ) (17,999 ) Recoveries 6,392 196 358 281 1,780 840 9,847 Net (charge-offs) recoveries 3,452 196 (1,046 ) (469 ) (9,248 ) (1,037 ) (8,152 ) Provision for credit losses (5,669 ) 1,479 1,967 240 15,437 1,091 14,545 Other (2,353 ) — (72 ) 78 (1,422 ) — (3,769 ) Balance, end of period $ 47,838 $ 36,344 $ 22,771 $ 11,978 $ 48,660 $ 653 $ 168,244 At or For the Quarter Ended September 30, 2016: Balance, beginning of period $ 64,765 $ 31,161 $ 20,124 $ 12,084 $ 29,772 $ 666 $ 158,572 Charge-offs (4,058 ) (4 ) (2,513 ) (697 ) (6,756 ) (2,216 ) (16,244 ) Recoveries 1,838 80 671 129 999 1,062 4,779 Net (charge-offs) recoveries (2,220 ) 76 (1,842 ) (568 ) (5,757 ) (1,154 ) (11,465 ) Provision for credit losses 1,402 411 2,367 335 8,361 1,018 13,894 Other (1,855 ) — — (44 ) (3,261 ) — (5,160 ) Balance, end of period $ 62,092 $ 31,648 $ 20,649 $ 11,807 $ 29,115 $ 530 $ 155,841 (In thousands) Consumer Commercial Leasing and Inventory Auto Other Total At or For the Nine Months Ended September 30, 2017: Balance, beginning of period $ 59,448 $ 32,695 $ 21,350 $ 13,932 $ 32,310 $ 534 $ 160,269 Charge-offs (9,205 ) (5,431 ) (5,694 ) (1,856 ) (28,045 ) (4,996 ) (55,227 ) Recoveries 18,783 455 1,718 675 4,680 2,761 29,072 Net (charge-offs) recoveries 9,578 (4,976 ) (3,976 ) (1,181 ) (23,365 ) (2,235 ) (26,155 ) Provision for credit losses (13,553 ) 8,625 5,520 (903 ) 44,141 2,354 46,184 Other (7,635 ) — (123 ) 130 (4,426 ) — (12,054 ) Balance, end of period $ 47,838 $ 36,344 $ 22,771 $ 11,978 $ 48,660 $ 653 $ 168,244 At or For the Nine Months Ended September 30, 2016: Balance, beginning of period $ 67,992 $ 30,185 $ 19,018 $ 11,128 $ 26,486 $ 1,245 $ 156,054 Charge-offs (14,550 ) (668 ) (6,125 ) (2,084 ) (18,683 ) (5,524 ) (47,634 ) Recoveries 5,094 330 1,834 696 2,743 3,435 14,132 Net (charge-offs) recoveries (9,456 ) (338 ) (4,291 ) (1,388 ) (15,940 ) (2,089 ) (33,502 ) Provision for credit losses 8,963 1,801 5,922 1,925 26,001 1,374 45,986 Other (5,407 ) — — 142 (7,432 ) — (12,697 ) Balance, end of period $ 62,092 $ 31,648 $ 20,649 $ 11,807 $ 29,115 $ 530 $ 155,841
Allowance for loan and lease losses and balances by type of allowance methodology	The allowance for loan and lease losses and loans and leases outstanding by type of allowance methodology were as follows: At September 30, 2017 (In thousands) Consumer Commercial Leasing and Inventory Auto Other Total Allowance for loan and lease losses: Collectively evaluated for impairment $ 29,042 $ 35,342 $ 19,049 $ 11,462 $ 48,234 $ 652 $ 143,781 Individually evaluated for impairment 18,796 1,002 3,722 516 426 1 24,463 Total $ 47,838 $ 36,344 $ 22,771 $ 11,978 $ 48,660 $ 653 $ 168,244 Loans and leases outstanding: Collectively evaluated for impairment $ 4,784,528 $ 3,457,229 $ 4,692,676 $ 2,572,899 $ 3,230,469 $ 20,436 $ 18,758,237 Individually evaluated for impairment 146,284 32,451 24,295 3,178 9,944 3 216,155 Loans acquired with deteriorated credit quality — — 13,960 — — — 13,960 Total $ 4,930,812 $ 3,489,680 $ 4,730,931 $ 2,576,077 $ 3,240,413 $ 20,439 $ 18,988,352 At December 31, 2016 (In thousands) Consumer Real Estate Commercial Leasing and Equipment Finance Inventory Finance Auto Finance Other Total Allowance for loan and lease losses: Collectively evaluated for impairment $ 36,103 $ 31,430 $ 19,093 $ 13,304 $ 31,106 $ 533 $ 131,569 Individually evaluated for impairment 23,345 1,265 2,257 628 1,204 1 28,700 Total $ 59,448 $ 32,695 $ 21,350 $ 13,932 $ 32,310 $ 534 $ 160,269 Loans and leases outstanding: Collectively evaluated for impairment $ 4,884,653 $ 3,242,389 $ 4,320,129 $ 2,465,041 $ 2,638,380 $ 18,765 $ 17,569,357 Individually evaluated for impairment 199,699 44,089 16,165 5,134 9,360 6 274,453 Loans acquired with deteriorated credit quality — — 16 — 1 — 17 Total $ 5,084,352 $ 3,286,478 $ 4,336,310 $ 2,470,175 $ 2,647,741 $ 18,771 $ 17,843,827
Schedule of accruing and non-accruing loans and leases	TCF's accruing and non-accrual loans and leases were as follows: At September 30, 2017 (In thousands) Current-59 Days Delinquent and Accruing 60-89 Days Delinquent and Accruing 90 Days or More Delinquent and Accruing Total Accruing Non-accrual Total Consumer real estate: First mortgage lien $ 1,884,543 $ 4,607 $ 1,387 $ 1,890,537 $ 62,662 $ 1,953,199 Junior lien 2,958,098 1,446 — 2,959,544 18,069 2,977,613 Total consumer real estate 4,842,641 6,053 1,387 4,850,081 80,731 4,930,812 Commercial: Commercial real estate 2,701,331 — — 2,701,331 10,337 2,711,668 Commercial business 778,010 2 — 778,012 — 778,012 Total commercial 3,479,341 2 — 3,479,343 10,337 3,489,680 Leasing and equipment finance 4,691,029 4,783 2,439 4,698,251 18,720 4,716,971 Inventory finance 2,572,764 58 77 2,572,899 3,178 2,576,077 Auto finance 3,225,757 4,840 3,163 3,233,760 6,653 3,240,413 Other 20,425 10 4 20,439 — 20,439 Subtotal 18,831,957 15,746 7,070 18,854,773 119,619 18,974,392 Portfolios acquired with deteriorated credit quality 12,644 — 1,316 13,960 — 13,960 Total $ 18,844,601 $ 15,746 $ 8,386 $ 18,868,733 $ 119,619 $ 18,988,352 At December 31, 2016 (In thousands) Current-59 Days Delinquent and Accruing 60-89 Days Delinquent and Accruing 90 Days or More Delinquent and Accruing Total Accruing Non-accrual Total Consumer real estate: First mortgage lien $ 2,177,746 $ 6,581 $ 2,144 $ 2,186,471 $ 106,125 $ 2,292,596 Junior lien 2,744,006 1,404 — 2,745,410 46,346 2,791,756 Total consumer real estate 4,921,752 7,985 2,144 4,931,881 152,471 5,084,352 Commercial: Commercial real estate 2,628,627 — — 2,628,627 5,564 2,634,191 Commercial business 651,932 — — 651,932 355 652,287 Total commercial 3,280,559 — — 3,280,559 5,919 3,286,478 Leasing and equipment finance 4,320,795 3,478 1,045 4,325,318 10,880 4,336,198 Inventory finance 2,464,986 16 39 2,465,041 5,134 2,470,175 Auto finance 2,634,600 3,785 2,317 2,640,702 7,038 2,647,740 Other 18,748 14 6 18,768 3 18,771 Subtotal 17,641,440 15,278 5,551 17,662,269 181,445 17,843,714 Portfolios acquired with deteriorated credit quality 113 — — 113 — 113 Total $ 17,641,553 $ 15,278 $ 5,551 $ 17,662,382 $ 181,445 $ 17,843,827
Interest income recognized on loans and leases in non-accrual status and contractual interest	Interest income recognized on loans and leases in non-accrual status and contractual interest that would have been recorded had the loans and leases performed in accordance with their original contractual terms were as follows: Quarter Ended September 30, Nine Months Ended September 30, (In thousands) 2017 2016 2017 2016 Contractual interest due on non-accrual loans and leases $ 3,529 $ 5,127 $ 11,606 $ 15,604 Interest income recognized on non-accrual loans and leases 581 1,048 2,274 3,097 Unrecognized interest income $ 2,948 $ 4,079 $ 9,332 $ 12,507
Summary of consumer real estate loans to customers involved in bankruptcy proceedings	Consumer real estate loans to customers currently involved in ongoing Chapter 7 or Chapter 13 bankruptcy proceedings which have not yet been discharged, dismissed or completed were as follows: (In thousands) At September 30, 2017 At December 31, 2016 Consumer real estate loans to customers in bankruptcy: 0-59 days delinquent and accruing $ 9,164 $ 13,675 Non-accrual 11,017 21,372 Total consumer real estate loans to customers in bankruptcy $ 20,181 $ 35,047
Schedule of TDR loans	TDR loans were as follows: At September 30, 2017 At December 31, 2016 (In thousands) Accruing TDR Loans Non-accrual TDR Loans Total TDR Loans Accruing TDR Loans Non-accrual TDR Loans Total TDR Loans Consumer real estate $ 90,753 $ 33,854 $ 124,607 $ 98,606 $ 71,961 $ 170,567 Commercial 4,677 3,491 8,168 20,304 2,170 22,474 Leasing and equipment finance 5,215 2,591 7,806 4,802 1,350 6,152 Inventory finance — 911 911 — 357 357 Auto finance 3,290 4,741 8,031 2,323 5,504 7,827 Other 5 — 5 6 — 6 Total $ 103,940 $ 45,588 $ 149,528 $ 126,041 $ 81,342 $ 207,383
Schedule of accruing loans that were restructured within 12 months and defaulted	TCF considers a loan to have defaulted when under the modified terms it becomes 90 or more days delinquent, has been transferred to non-accrual status, has been charged down or has been transferred to other real estate owned or repossessed and returned assets. The following table summarizes the TDR loans that defaulted during the third quarter and first nine months of 2017 and 2016 , which were modified during the respective reporting period or within one year of the beginning of the respective reporting period. Included in commercial loans that defaulted during the nine months ended September 30, 2017 was one commercial loan that was transferred to non-accrual status during the first quarter of 2017. Quarter Ended September 30, Nine Months Ended September 30, (In thousands) 2017 2016 2017 2016 Defaulted TDR loan balances modified during the applicable period: (1) Consumer real estate: First mortgage lien $ 856 $ 2,150 $ 2,328 $ 6,635 Junior lien 317 179 518 676 Total consumer real estate 1,173 2,329 2,846 7,311 Commercial real estate — — 6,681 — Leasing and equipment finance 451 — 635 — Auto finance 260 334 867 1,233 Defaulted TDR loan balances modified during the applicable period $ 1,884 $ 2,663 $ 11,029 $ 8,544 (1) The loan balances presented are not materially different than the pre-modification loan balances as TCF's loan modifications generally do not forgive principal amounts.
Information on impaired loans	Information on impaired loans was as follows: At September 30, 2017 At December 31, 2016 (In thousands) Unpaid Loan Related Unpaid Loan Related Impaired loans with an allowance recorded: Consumer real estate: First mortgage lien $ 90,190 $ 80,379 $ 14,272 $ 122,704 $ 104,601 $ 16,835 Junior lien 33,607 30,757 4,239 62,481 51,410 5,829 Total consumer real estate 123,797 111,136 18,511 185,185 156,011 22,664 Commercial: Commercial real estate 6,853 6,846 1,000 10,083 10,075 1,262 Commercial business 13 13 2 14 14 3 Total commercial 6,866 6,859 1,002 10,097 10,089 1,265 Leasing and equipment finance 13,376 13,376 1,928 9,900 9,900 1,044 Inventory finance 1,871 1,874 516 4,357 4,365 628 Auto finance 1,572 1,255 364 5,801 5,419 1,126 Other 4 5 1 6 6 1 Total impaired loans with an allowance recorded 147,486 134,505 22,322 215,346 185,790 26,728 Impaired loans without an allowance recorded: Consumer real estate: First mortgage lien 17,150 11,855 — 18,539 12,674 — Junior lien 16,358 1,616 — 26,915 1,882 — Total consumer real estate 33,508 13,471 — 45,454 14,556 — Commercial: Commercial real estate 11,755 7,940 — 21,601 15,780 — Commercial business 215 215 — 354 354 — Total commercial 11,970 8,155 — 21,955 16,134 — Inventory finance 1,299 1,304 — 767 769 — Auto finance 8,993 6,776 — 3,919 2,408 — Other 87 — — 85 — — Total impaired loans without an allowance recorded 55,857 29,706 — 72,180 33,867 — Total impaired loans $ 203,343 $ 164,211 $ 22,322 $ 287,526 $ 219,657 $ 26,728
Average balance of impaired loans and interest income recognized on impaired loans	The average loan balance of impaired loans and interest income recognized on impaired loans were as follows: Quarter Ended September 30, Nine Months Ended September 30, 2017 2016 2017 2016 (In thousands) Average Loan Balance Interest Income Recognized Average Loan Balance Interest Income Recognized Average Loan Balance Interest Income Recognized Average Loan Balance Interest Income Recognized Impaired loans with an allowance recorded: Consumer real estate: First mortgage lien $ 84,126 $ 679 $ 114,966 $ 944 $ 92,490 $ 2,097 $ 116,315 $ 2,762 Junior lien 33,438 382 54,651 675 41,083 1,209 55,824 1,993 Total consumer real estate 117,564 1,061 169,617 1,619 133,573 3,306 172,139 4,755 Commercial: Commercial real estate 5,119 — 12,926 100 8,461 16 6,530 230 Commercial business 13 — 15 — 13 48 15 — Total commercial 5,132 — 12,941 100 8,474 64 6,545 230 Leasing and equipment finance 11,837 10 10,844 3 11,638 28 8,963 21 Inventory finance 2,078 18 777 10 3,120 176 1,030 41 Auto finance 2,792 55 5,871 33 3,337 146 6,883 72 Other 4 — 8 — 6 — 10 — Total impaired loans with an allowance recorded 139,407 1,144 200,058 1,765 160,148 3,720 195,570 5,119 Impaired loans without an allowance recorded: Consumer real estate: First mortgage lien 11,871 212 8,023 120 12,264 736 8,280 228 Junior lien 1,669 71 1,348 170 1,749 392 1,368 485 Total consumer real estate 13,540 283 9,371 290 14,013 1,128 9,648 713 Commercial: Commercial real estate 12,090 95 15,101 170 11,860 438 22,729 606 Commercial business 334 2 3,869 — 284 3 3,587 — Total commercial 12,424 97 18,970 170 12,144 441 26,316 606 Inventory finance 1,255 62 333 35 1,037 136 332 69 Auto finance 4,878 — 2,241 — 4,592 — 1,757 — Total impaired loans without an allowance recorded 32,097 442 30,915 495 31,786 1,705 38,053 1,388 Total impaired loans $ 171,504 $ 1,586 $ 230,973 $ 2,260 $ 191,934 $ 5,425 $ 233,623 $ 6,507

Investments in Affordable Housi

Investments in Affordable Housing Limited Liability Entities (Tables)	9 Months Ended
	Sep. 30, 2017
Equity Method Investments and Joint Ventures [Abstract]
Investments in affordable housing limited liability entities and unfunded commitments	Investments in affordable housing limited liability entities and unfunded commitments were as follows: (In thousands) At September 30, 2017 At December 31, 2016 Investments in affordable housing limited liability entities $ 76,034 $ 30,279 Accrued expenses and other liabilities - unfunded commitments 39,782 12,082

Goodwill and Other Intangibles

Goodwill and Other Intangibles (Tables)	9 Months Ended
	Sep. 30, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of goodwill and other intangible assets	Goodwill and other intangible assets were as follows: At September 30, 2017 At December 31, 2016 (In thousands) Gross Amount Accumulated Amortization Net Amount Gross Amount Accumulated Amortization Net Amount Unamortizable intangible assets: Goodwill related to consumer banking segment $ 214,286 $ 214,286 $ 214,286 $ 214,286 Goodwill related to wholesale banking segment 13,512 13,512 11,354 11,354 Total $ 227,798 $ 227,798 $ 225,640 $ 225,640 Amortizable intangible assets: Program agreement $ 14,700 $ 26 $ 14,674 $ — $ — $ — Non-compete agreement 10,590 5,155 5,435 4,590 4,590 — Customer base intangibles 3,330 2,407 923 2,730 2,002 728 Deposit base intangibles 3,049 2,234 815 3,049 2,069 980 Tradename 300 300 — 300 300 — Total $ 31,969 $ 10,122 $ 21,847 $ 10,669 $ 8,961 $ 1,708

Long-term Borrowings (Tables)

Long-term Borrowings (Tables)	9 Months Ended
	Sep. 30, 2017
Debt Disclosure [Abstract]
Information about long-term borrowings	Long-term borrowings were as follows: At September 30, 2017 At December 31, 2016 (Dollars in thousands) Stated Maturity Amount Stated Rate Amount Stated Rate Federal Home Loan Bank advances 2018 $ — — $ 375,000 0.72 % - 0.81 % 2019 1,000,000 1.35 % - 1.39 % 300,000 0.78 - 0.81 Subtotal 1,000,000 675,000 Subordinated bank notes 2022 108,813 6.25 108,654 6.25 2025 148,200 4.60 148,052 4.60 Hedge-related basis adjustment (1) (748 ) (1,349 ) Subtotal 256,265 255,357 Discounted lease rentals 2017 15,221 2.81 - 6.88 57,081 2.45 - 7.88 2018 50,332 2.55 - 7.95 42,132 2.55 - 7.95 2019 32,680 2.53 - 6.00 24,671 2.53 - 6.00 2020 17,601 2.64 - 6.00 11,753 2.64 - 6.90 2021 8,733 2.88 - 5.00 4,423 2.88 - 4.57 2022 1,756 3.04 - 5.24 — — Subtotal 126,323 140,060 Other long-term borrowings 2017 — — 2,764 1.36 Total long-term borrowings $ 1,382,588 $ 1,073,181 (1) Related to subordinated bank notes with a stated maturity of 2025.

Equity (Tables)

Equity (Tables)	9 Months Ended
	Sep. 30, 2017
Equity [Abstract]
Preferred Stock	Preferred stock was as follows: (In thousands) At September 30, 2017 At December 31, 2016 Series A non-cumulative perpetual preferred stock $ — $ 166,721 Series B non-cumulative perpetual preferred stock 96,519 96,519 Series C non-cumulative perpetual preferred stock 169,448 — Total preferred stock $ 265,967 $ 263,240

Regulatory Capital Requiremen35

Regulatory Capital Requirements (Tables)	9 Months Ended
	Sep. 30, 2017
Regulatory Capital Requirements [Abstract]
Schedule of regulatory capital information for TCF and TCF Bank	Regulatory capital information for TCF and TCF Bank was as follows: TCF TCF Bank At September 30, At December 31, At September 30, At December 31, Well-capitalized Standard Minimum Capital Requirement (1) (Dollars in thousands) 2017 2016 2017 2016 Regulatory Capital: Common equity Tier 1 capital $ 2,080,729 $ 1,970,323 $ 2,267,884 $ 2,144,966 Tier 1 capital 2,362,926 2,248,221 2,287,790 2,162,128 Total capital 2,734,260 2,635,925 2,695,379 2,583,512 Regulatory Capital Ratios: Common equity Tier 1 capital ratio 10.05 % 10.24 % 10.96 % 11.14 % 6.50 % 4.50 % Tier 1 risk-based capital ratio 11.41 11.68 11.05 11.23 8.00 6.00 Total risk-based capital ratio 13.21 13.69 13.02 13.42 10.00 8.00 Tier 1 leverage ratio 10.88 10.73 10.53 10.32 5.00 4.00 (1) Excludes capital conservation buffer of 1.25% and 0.625% as of September 30, 2017 and December 31, 2016 .

Stock Compensation (Tables)

Stock Compensation (Tables)	9 Months Ended
	Sep. 30, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Restricted Stock Award and Stock Option Transactions	TCF's restricted stock award and stock option transactions under the TCF Financial 2015 Omnibus Incentive Plan ("Omnibus Incentive Plan") and the TCF Financial Incentive Stock Program ("Incentive Stock Program") during the nine months ended September 30, 2017 were as follows: Restricted Stock Awards Stock Options Shares Grant Date Fair Value Range Weighted- average Grant Date Fair Value Shares Weighted- average Remaining Contractual Life in Years Weighted- average Exercise Price Outstanding at December 31, 2016 3,536,175 $ 7.73 - $ 16.28 $ 12.81 404,000 1.06 $ 15.75 Granted 510,371 13.96 - 18.58 16.19 — — — Exercised — — - — — (38,000 ) — 15.75 Forfeited/canceled (485,670 ) 7.73 - 15.87 10.93 — — — Vested (898,680 ) 9.36 - 16.02 13.65 — — — Outstanding at September 30, 2017 2,662,196 7.73 - 18.58 13.52 366,000 0.31 15.75 Exercisable at September 30, 2017 N.A. N.A. 366,000 15.75 N.A. Not Applicable.

Employee Benefit Plans (Tables)

Employee Benefit Plans (Tables)	9 Months Ended
	Sep. 30, 2017
Retirement Benefits [Abstract]
Schedule of net periodic benefit cost included in compensation and employee benefits expense for cash balance Pension Plan and Postretirement Plan	The net periodic benefit plan (income) cost included in compensation and employee benefits expense for the TCF Cash Balance Pension Plan (the "Pension Plan") and health care benefits for eligible retired employees (the "Postretirement Plan") were as follows: Pension Plan Quarter Ended September 30, Nine Months Ended September 30, (In thousands) 2017 2016 2017 2016 Interest cost $ 284 $ 321 $ 854 $ 961 (Gain) loss on plan assets (142 ) (147 ) (426 ) (440 ) Net periodic benefit plan (income) cost $ 142 $ 174 $ 428 $ 521 Postretirement Plan Quarter Ended September 30, Nine Months Ended September 30, (In thousands) 2017 2016 2017 2016 Interest cost $ 33 $ 37 $ 100 $ 113 Amortization of prior service cost (12 ) (12 ) (35 ) (35 ) Net periodic benefit plan (income) cost $ 21 $ 25 $ 65 $ 78

Derivative Instruments (Tables)

Derivative Instruments (Tables)	9 Months Ended
	Sep. 30, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Summary of derivative instruments	Derivative instruments were as follows: At September 30, 2017 (In thousands) Notional Amount Gross Amounts Recognized Gross Amounts Offset Net Amount Presented Derivative Assets: Derivatives designated as hedges: Forward foreign exchange contracts $ 75,539 $ 2,180 $ (2,180 ) $ — Derivatives not designated as hedges: Forward foreign exchange contracts 397,903 6,044 (4,817 ) 1,227 Interest rate contracts 445,711 2,763 (91 ) 2,672 Interest rate lock commitments 33,763 489 — 489 Total derivative assets $ 11,476 $ (7,088 ) $ 4,388 Derivative Liabilities: Derivatives designated as hedges: Interest rate contracts $ 150,000 $ 75 $ (75 ) $ — Derivatives not designated as hedges: Interest rate contracts 92,799 613 (16 ) 597 Other contracts 13,804 384 (384 ) — Interest rate lock commitments 313 3 — 3 Total derivative liabilities $ 1,075 $ (475 ) $ 600 At December 31, 2016 (In thousands) Notional Amount Gross Amounts Recognized Gross Amounts Offset Net Amount Presented Derivative Assets: Derivatives designated as hedges: Forward foreign exchange contracts $ 61,760 $ 1,082 $ — $ 1,082 Derivatives not designated as hedges: Forward foreign exchange contracts 250,018 2,995 (1,439 ) 1,556 Interest rate contracts 149,499 1,925 (633 ) 1,292 Interest rate lock commitments 27,954 318 — 318 Total derivative assets $ 6,320 $ (2,072 ) $ 4,248 Derivative Liabilities: Derivatives designated as hedges: Interest rate contracts $ 150,000 $ 1,320 $ (1,320 ) $ — Derivatives not designated as hedges: Forward foreign exchange contracts 115,336 469 (445 ) 24 Interest rate contracts 149,499 1,936 (1,332 ) 604 Other contracts 13,804 619 (619 ) — Interest rate lock commitments 2,947 21 — 21 Total derivative liabilities $ 4,365 $ (3,716 ) $ 649
Schedule of pre-tax impact of derivative activity	The pre-tax impact of derivative activity within the Consolidated Statements of Income and the Consolidated Statements of Comprehensive Income was as follows: Quarter Ended September 30, Nine Months Ended September 30, (In thousands) Income Statement Location 2017 2016 2017 2016 Consolidated Statements of Income: Fair value hedges: Interest rate contracts Other non-interest income $ (135 ) $ (1,407 ) $ 813 $ 9,132 Non-derivative hedged items Other non-interest income 146 1,333 (601 ) (7,868 ) Not designated as hedges: Forward foreign exchange contracts Other non-interest expense (10,690 ) 5,979 (20,323 ) (23,459 ) Interest rate lock commitments Gains on sales of consumer real estate loans, net (29 ) (91 ) 189 146 Interest rate contracts Other non-interest income (155 ) 27 (263 ) (92 ) Other contracts Other non-interest expense — — — (319 ) Net gain (loss) recognized $ (10,863 ) $ 5,841 $ (20,185 ) $ (22,460 ) Consolidated Statements of Comprehensive Income: Net investment hedges: Forward foreign exchange contracts Other comprehensive income (loss) $ (2,714 ) $ 904 $ (5,073 ) $ (2,691 ) Net unrealized gain (loss) $ (2,714 ) $ 904 $ (5,073 ) $ (2,691 )

Fair Values Disclosures (Tables

Fair Values Disclosures (Tables)	9 Months Ended
	Sep. 30, 2017
Fair Value Disclosures [Abstract]
Balances of assets and liabilities measured at fair value on a recurring and non-recurring basis	The balances of assets and liabilities measured at fair value on a recurring and non-recurring basis were as follows: Fair Value Measurements at September 30, 2017 (In thousands) Level 1 Level 2 Level 3 Total Recurring Fair Value Measurements: Securities available for sale: Mortgage-backed securities: U.S. Government sponsored enterprises and federal agencies $ — $ 830,621 $ — $ 830,621 Other — — 8 8 Obligations of states and political subdivisions — 767,534 — 767,534 Loans held for sale — — 4,193 4,193 Interest-only strips — — 23,797 23,797 Forward foreign exchange contracts (1) — 8,224 — 8,224 Interest rate contracts (1) — 2,763 — 2,763 Interest rate lock commitments (1) — — 489 489 Forward loan sales commitments — — 20 20 Assets held in trust for deferred compensation plans 27,217 — — 27,217 Total assets $ 27,217 $ 1,609,142 $ 28,507 $ 1,664,866 Interest rate contracts (1) $ — $ 688 $ — $ 688 Interest rate lock commitments (1) — — 3 3 Forward loan sales commitments — — 73 73 Liabilities held in trust for deferred compensation plans 27,217 — — 27,217 Other contracts (1) — — 384 384 Total liabilities $ 27,217 $ 688 $ 460 $ 28,365 Non-recurring Fair Value Measurements: Loans $ — $ — $ 74,097 $ 74,097 Other real estate owned: Consumer — — 15,703 15,703 Commercial — — 3,451 3,451 Repossessed and returned assets — 3,734 3,258 6,992 Total non-recurring fair value measurements $ — $ 3,734 $ 96,509 $ 100,243 (1) As permitted under GAAP, TCF has elected to net derivative assets and derivative liabilities when a legally enforceable master netting agreement exists as well as the related cash collateral received and paid. For purposes of this table, the derivative assets and derivative liabilities are presented gross of this netting adjustment. Fair Value Measurements at December 31, 2016 (In thousands) Level 1 Level 2 Level 3 Total Recurring Fair Value Measurements: Securities available for sale: Mortgage-backed securities: U.S. Government sponsored enterprises and federal agencies $ — $ 810,891 $ — $ 810,891 Other — — 18 18 Obligations of states and political subdivisions — 612,526 — 612,526 Loans held for sale — — 6,498 6,498 Interest-only strips — — 40,152 40,152 Forward foreign exchange contracts (1) — 4,077 — 4,077 Interest rate contracts (1) — 1,925 — 1,925 Interest rate lock commitments (1) — — 318 318 Forward loan sales commitments — — 374 374 Assets held in trust for deferred compensation plans 23,363 — — 23,363 Total assets $ 23,363 $ 1,429,419 $ 47,360 $ 1,500,142 Forward foreign exchange contracts (1) $ — $ 469 $ — $ 469 Interest rate contracts (1) — 3,256 — 3,256 Interest rate lock commitments (1) — — 21 21 Forward loan sales commitments — — 13 13 Liabilities held in trust for deferred compensation plans 23,363 — — 23,363 Other contracts (1) — — 619 619 Total liabilities $ 23,363 $ 3,725 $ 653 $ 27,741 Non-recurring Fair Value Measurements: Securities held to maturity $ — $ — $ 2,400 $ 2,400 Loans — — 113,954 113,954 Other real estate owned: Consumer — — 25,751 25,751 Commercial — — 3,874 3,874 Repossessed and returned assets — 2,767 2,800 5,567 Total non-recurring fair value measurements $ — $ 2,767 $ 148,779 $ 151,546 (1) As permitted under GAAP, TCF has elected to net derivative assets and derivative liabilities when a legally enforceable master netting agreement exists as well as the related cash collateral received and paid. For purposes of this table, the derivative assets and derivative liabilities are presented gross of this netting adjustment.
Schedule of changes in Level 3 assets and liabilities measured at fair value on a recurring basis	The changes in Level 3 assets and liabilities measured at fair value on a recurring basis were as follows: (In thousands) Securities Loans Interest-only Strips Interest Forward Other Contracts At or For the Quarter Ended September 30, 2017: Asset (liability) balance, beginning of period $ 11 $ 5,238 $ 32,582 $ 515 $ (67 ) $ (462 ) Total net gains (losses) included in: Net income — 17 1,110 (29 ) 14 — Other comprehensive income (loss) — — (1,063 ) — — — Sales — (59,308 ) — — — — Originations — 58,634 542 — — — Principal paydowns / settlements (3 ) (388 ) (9,374 ) — — 78 Asset (liability) balance, end of period $ 8 $ 4,193 $ 23,797 $ 486 $ (53 ) $ (384 ) At or For the Quarter Ended September 30, 2016: Asset (liability) balance, beginning of period $ 25 $ 7,565 $ 48,411 $ 953 $ (317 ) $ (466 ) Total net gains (losses) included in: Net income — (72 ) (819 ) (91 ) 121 — Other comprehensive income (loss) — — 784 — — — Sales — (95,901 ) — — — — Originations — 94,739 2,513 — — — Principal paydowns / settlements (3 ) — (7,744 ) — — 79 Asset (liability) balance, end of period $ 22 $ 6,331 $ 43,145 $ 862 $ (196 ) $ (387 ) (In thousands) Securities Available for Sale Loans Held for Sale Interest-only Strips Interest Rate Lock Commitments Forward Loan Sales Commitments Other Contracts At or For the Nine Months Ended September 30, 2017: Asset (liability) balance, beginning of period $ 18 $ 6,498 $ 40,152 $ 297 $ 361 $ (619 ) Total net gains (losses) included in: Net income — 155 3,323 189 (414 ) — Other comprehensive income (loss) — — (464 ) — — — Sales — (151,182 ) — — — — Originations — 149,118 2,458 — — — Principal paydowns / settlements (10 ) (396 ) (21,672 ) — — 235 Asset (liability) balance, end of period $ 8 $ 4,193 $ 23,797 $ 486 $ (53 ) $ (384 ) At or For the Nine Months Ended September 30, 2016: Asset (liability) balance, beginning of period $ 34 $ 10,568 $ 44,332 $ 716 $ 265 $ (305 ) Total net gains (losses) included in: Net income — 126 1,697 146 (461 ) (318 ) Other comprehensive income (loss) — — 784 — — — Sales — (257,641 ) — — — — Originations — 253,278 19,121 — — — Principal paydowns / settlements (12 ) — (22,789 ) — — 236 Asset (liability) balance, end of period $ 22 $ 6,331 $ 43,145 $ 862 $ (196 ) $ (387 )
Schedule of differences between the aggregate fair value and aggregate unpaid principal balance on loans held for sale	The difference between the aggregate fair value and aggregate unpaid principal balance of these loans held for sale was as follows: (In thousands) At September 30, 2017 At December 31, 2016 Fair value carrying amount $ 4,193 $ 6,498 Aggregate unpaid principal amount 4,082 6,563 Fair value carrying amount less aggregate unpaid principal $ 111 $ (65 )
Fair value of assets and liabilities, including hierarchy level	The carrying amounts and estimated fair values of the Company's financial instruments, excluding short-term financial assets and liabilities as their carrying amounts approximate fair value, and excluding financial instruments recorded at fair value on a recurring basis, were as follows. This information represents only a portion of TCF's balance sheet and not the estimated value of the Company as a whole. Non-financial instruments such as the intangible value of TCF's branches and core deposits, leasing operations, goodwill, premises and equipment and the future revenues from TCF's customers are not reflected in this disclosure. Therefore, this information is of limited use in assessing the value of TCF. Carrying Amount Estimated Fair Value at September 30, 2017 (In thousands) Level 1 Level 2 Level 3 Total Financial instrument assets: Investments $ 87,690 $ — $ 87,690 $ — $ 87,690 Securities held to maturity 165,315 — 167,302 2,800 170,102 Loans held for sale 253,958 — — 261,023 261,023 Loans: Consumer real estate 4,930,812 — — 5,042,688 5,042,688 Commercial real estate 2,711,668 — — 2,672,585 2,672,585 Commercial business 778,012 — — 755,703 755,703 Equipment finance 2,263,723 — — 2,234,458 2,234,458 Inventory finance 2,576,077 — — 2,560,652 2,560,652 Auto finance 3,240,413 — — 3,233,835 3,233,835 Other 20,439 — — 20,104 20,104 Allowance for loan losses (1) (168,244 ) — — — — Securitization receivable (2) 19,117 — — 18,489 18,489 Total financial instrument assets $ 16,878,980 $ — $ 254,992 $ 16,802,337 $ 17,057,329 Financial instrument liabilities: Deposits $ 18,107,486 $ 13,135,428 $ 5,004,242 $ — $ 18,139,670 Long-term borrowings 1,382,588 — 1,390,859 — 1,390,859 Total financial instrument liabilities $ 19,490,074 $ 13,135,428 $ 6,395,101 $ — $ 19,530,529 Financial instruments with off-balance sheet risk: (3) Commitments to extend credit $ 20,353 $ — $ 20,353 $ — $ 20,353 Standby letters of credit (59 ) — (59 ) — (59 ) Total financial instruments with off-balance sheet risk $ 20,294 $ — $ 20,294 $ — $ 20,294 (1) Expected credit losses are included in the estimated fair values. (2) Carrying amounts are included in other assets. (3) Positive amounts represent assets, negative amounts represent liabilities. Carrying Amount Estimated Fair Value at December 31, 2016 (In thousands) Level 1 Level 2 Level 3 Total Financial instrument assets: Investments $ 74,714 $ — $ 74,714 $ — $ 74,714 Securities held to maturity 181,314 — 181,146 2,800 183,946 Loans held for sale 268,832 — — 282,786 282,786 Loans: Consumer real estate 5,084,352 — — 5,165,062 5,165,062 Commercial real estate 2,634,191 — — 2,583,775 2,583,775 Commercial business 652,287 — — 631,215 631,215 Equipment finance 2,016,732 — — 1,983,237 1,983,237 Inventory finance 2,470,175 — — 2,453,184 2,453,184 Auto finance 2,647,741 — — 2,656,266 2,656,266 Other 18,771 — — 17,780 17,780 Allowance for loan losses (1) (160,269 ) — — — — Securitization receivable (2) 18,835 — — 18,835 18,835 Total financial instrument assets $ 15,907,675 $ — $ 255,860 $ 15,794,940 $ 16,050,800 Financial instrument liabilities: Deposits $ 17,242,522 $ 13,150,099 $ 4,112,685 $ — $ 17,262,784 Long-term borrowings 1,073,181 — 1,073,875 2,764 1,076,639 Total financial instrument liabilities $ 18,315,703 $ 13,150,099 $ 5,186,560 $ 2,764 $ 18,339,423 Financial instruments with off-balance sheet risk: (3) Commitments to extend credit $ 21,681 $ — $ 21,681 $ — $ 21,681 Standby letters of credit (29 ) — (29 ) — (29 ) Total financial instruments with off-balance sheet risk $ 21,652 $ — $ 21,652 $ — $ 21,652 (1) Expected credit losses are included in the estimated fair values. (2) Carrying amounts are included in other assets. (3) Positive amounts represent assets, negative amounts represent liabilities.

Earnings Per Common Share (Tabl

Earnings Per Common Share (Tables)	9 Months Ended
	Sep. 30, 2017
Earnings Per Share [Abstract]
Computation of basic and diluted earnings per common share	The computations of basic and diluted earnings per common share were as follows: Quarter Ended September 30, Nine Months Ended September 30, (Dollars in thousands, except per share data) 2017 2016 2017 2016 Basic Earnings Per Common Share: Net income attributable to TCF Financial Corporation $ 60,528 $ 56,292 $ 167,238 $ 162,032 Preferred stock dividends 6,464 4,847 16,158 14,541 Impact of notice to redeem preferred stock (1) 5,779 — 5,779 — Net income available to common stockholders 48,285 51,445 145,301 147,491 Less: Earnings allocated to participating securities 8 13 25 38 Earnings allocated to common stock $ 48,277 $ 51,432 $ 145,276 $ 147,453 Weighted-average common shares outstanding for basic earnings per common share 168,970,543 167,366,069 168,492,877 167,155,393 Basic earnings per common share $ 0.29 $ 0.31 $ 0.86 $ 0.88 Diluted Earnings Per Common Share: Earnings allocated to common stock $ 48,277 $ 51,432 $ 145,276 $ 147,453 Weighted-average common shares outstanding used in basic earnings per common share calculation 168,970,543 167,366,069 168,492,877 167,155,393 Net dilutive effect of: Non-participating restricted stock 269,394 516,083 312,297 478,641 Stock options 314 85,467 17,654 73,866 Weighted-average common shares outstanding for diluted earnings per common share 169,240,251 167,967,619 168,822,828 167,707,900 Diluted earnings per common share $ 0.29 $ 0.31 $ 0.86 $ 0.88 (1) Represents the amount of deferred stock issuance costs originally recorded in preferred stock upon the issuance of the Series A Preferred Stock that were reclassified to retained earnings on September 15, 2017, the date the Company announced its intent to redeem the outstanding Series A Preferred Stock.

Other Non-interest Expense (Tab

Other Non-interest Expense (Tables)	9 Months Ended
	Sep. 30, 2017
Other Income and Expenses [Abstract]
Other Non-interest Expense	Other non-interest expense was as follows: Quarter Ended September 30, Nine Months Ended September 30, (In thousands) 2017 2016 2017 2016 Professional fees $ 9,875 $ 3,993 $ 26,295 $ 13,170 Advertising and marketing 6,060 5,488 19,678 17,053 Loan and lease processing 5,304 7,035 17,258 19,526 Outside processing 5,176 3,728 14,411 10,941 Card processing and issuance costs 4,719 3,952 13,534 11,634 FDIC insurance 4,181 4,082 11,964 11,946 Other 26,093 31,143 83,380 87,915 Total other non-interest expense $ 61,408 $ 59,421 $ 186,520 $ 172,185

Business Segments (Tables)

Business Segments (Tables)	9 Months Ended
	Sep. 30, 2017
Segment Reporting [Abstract]
Reportable segments, including a reconciliation of consolidated totals	Certain information for each of TCF's reportable segments, including reconciliations of TCF's consolidated totals, was as follows: (In thousands) Consumer Banking Wholesale Banking Enterprise Services Consolidated At or For the Quarter Ended September 30, 2017: Net interest income $ 145,361 $ 88,941 $ (199 ) $ 234,103 Provision for credit losses 11,129 3,416 — 14,545 Non-interest income 70,934 38,272 24 109,230 Non-interest expense 164,062 70,184 789 235,035 Income tax expense (benefit) 14,370 17,153 (819 ) 30,704 Income (loss) after income tax expense (benefit) 26,734 36,460 (145 ) 63,049 Income attributable to non-controlling interest — 2,521 — 2,521 Preferred stock dividends — — 6,464 6,464 Impact of notice to redeem preferred stock — — 5,779 5,779 Net income (loss) available to common stockholders $ 26,734 $ 33,939 $ (12,388 ) $ 48,285 Total assets $ 9,025,172 $ 11,274,153 $ 2,705,713 $ 23,005,038 Revenues from external customers: Interest income $ 116,296 $ 130,618 $ 10,691 $ 257,605 Non-interest income 70,934 38,272 24 109,230 Total $ 187,230 $ 168,890 $ 10,715 $ 366,835 At or For the Quarter Ended September 30, 2016: Net interest income $ 140,887 $ 85,721 $ (14,590 ) $ 212,018 Provision for credit losses 10,720 3,174 — 13,894 Non-interest income 89,373 30,393 (92 ) 119,674 Non-interest expense 165,668 61,382 1,828 228,878 Income tax expense (benefit) 19,367 17,355 (6,465 ) 30,257 Income (loss) after income tax expense (benefit) 34,505 34,203 (10,045 ) 58,663 Income attributable to non-controlling interest — 2,371 — 2,371 Preferred stock dividends — — 4,847 4,847 Net income (loss) available to common stockholders $ 34,505 $ 31,832 $ (14,892 ) $ 51,445 Total assets $ 8,759,858 $ 9,902,952 $ 2,421,346 $ 21,084,156 Revenues from external customers: Interest income $ 111,107 $ 112,834 $ 8,785 $ 232,726 Non-interest income 89,373 30,393 (92 ) 119,674 Total $ 200,480 $ 143,227 $ 8,693 $ 352,400 (In thousands) Consumer Banking Wholesale Banking Enterprise Services Consolidated At or For the Nine Months Ended September 30, 2017: Net interest income $ 428,782 $ 264,749 $ (10,153 ) $ 683,378 Provision for credit losses 33,211 12,973 — 46,184 Non-interest income 215,154 111,930 323 327,407 Non-interest expense 494,449 202,687 14,992 712,128 Income tax expense (benefit) 41,133 52,760 (16,552 ) 77,341 Income (loss) after income tax expense (benefit) 75,143 108,259 (8,270 ) 175,132 Income attributable to non-controlling interest — 7,894 — 7,894 Preferred stock dividends — — 16,158 16,158 Impact of notice to redeem preferred stock — — 5,779 5,779 Net income (loss) available to common stockholders $ 75,143 $ 100,365 $ (30,207 ) $ 145,301 Total assets $ 9,025,172 $ 11,274,153 $ 2,705,713 $ 23,005,038 Revenues from external customers: Interest income $ 337,343 $ 380,210 $ 30,876 $ 748,429 Non-interest income 215,154 111,930 323 327,407 Total $ 552,497 $ 492,140 $ 31,199 $ 1,075,836 At or For the Nine Months Ended September 30, 2016: Net interest income $ 420,886 $ 257,917 $ (42,143 ) $ 636,660 Provision for credit losses 36,278 9,708 — 45,986 Non-interest income 254,130 94,794 1,308 350,232 Non-interest expense 491,632 184,217 8,679 684,528 Income tax expense (benefit) 52,824 52,866 (18,924 ) 86,766 Income (loss) after income tax expense (benefit) 94,282 105,920 (30,590 ) 169,612 Income attributable to non-controlling interest — 7,580 — 7,580 Preferred stock dividends — — 14,541 14,541 Net income (loss) available to common stockholders $ 94,282 $ 98,340 $ (45,131 ) $ 147,491 Total assets $ 8,759,858 $ 9,902,952 $ 2,421,346 $ 21,084,156 Revenues from external customers: Interest income $ 336,176 $ 338,461 $ 24,435 $ 699,072 Non-interest income 254,130 94,794 1,308 350,232 Total $ 590,306 $ 433,255 $ 25,743 $ 1,049,304

Accumulated Other Comprehensi43

Accumulated Other Comprehensive Income (Loss) (Tables)	9 Months Ended
	Sep. 30, 2017
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Summary of components of other comprehensive income and the related tax effects	The components of other comprehensive income (loss) and the related tax effects were as follows: Quarter Ended September 30, 2017 2016 (In thousands) Before Tax Tax Effect Net of Tax Before Tax Tax Effect Net of Tax Net unrealized gains (losses) on securities available for sale and interest-only strips: Unrealized gains (losses) arising during the period $ 4,974 $ (1,892 ) $ 3,082 $ (7,624 ) $ 2,896 $ (4,728 ) Reclassification of net (gains) losses from accumulated other comprehensive income (loss) (1,028 ) 391 (637 ) 425 (161 ) 264 Net unrealized gains (losses) 3,946 (1,501 ) 2,445 (7,199 ) 2,735 (4,464 ) Net unrealized gains (losses) on net investment hedges (2,714 ) 1,032 (1,682 ) 904 (343 ) 561 Foreign currency translation adjustment (1) 2,939 — 2,939 (957 ) — (957 ) Recognized postretirement prior service cost: Reclassification of net (gains) losses from accumulated other comprehensive income (loss) (12 ) 4 (8 ) (12 ) 4 (8 ) Total other comprehensive income (loss) $ 4,159 $ (465 ) $ 3,694 $ (7,264 ) $ 2,396 $ (4,868 ) Nine Months Ended September 30, 2017 2016 (In thousands) Before Tax Tax Effect Net of Tax Before Tax Tax Effect Net of Tax Net unrealized gains (losses) on securities available for sale and interest-only strips: Unrealized gains (losses) arising during the period $ 28,562 $ (10,859 ) $ 17,703 $ 32,639 $ (12,396 ) $ 20,243 Reclassification of net (gains) losses from accumulated other comprehensive income (loss) (238 ) 90 (148 ) 1,448 (550 ) 898 Net unrealized gains (losses) 28,324 (10,769 ) 17,555 34,087 (12,946 ) 21,141 Net unrealized gains (losses) on net investment hedges (5,073 ) 1,929 (3,144 ) (2,691 ) 1,022 (1,669 ) Foreign currency translation adjustment (1) 5,527 — 5,527 2,791 — 2,791 Recognized postretirement prior service cost: Reclassification of net (gains) losses from accumulated other comprehensive income (loss) (35 ) 13 (22 ) (35 ) 13 (22 ) Total other comprehensive income (loss) $ 28,743 $ (8,827 ) $ 19,916 $ 34,152 $ (11,911 ) $ 22,241 (1) Foreign investments are deemed to be permanent in nature and therefore TCF does not provide for taxes on foreign currency translation adjustments.
Schedule of accumulated other comprehensive income	The components of accumulated other comprehensive income (loss) were as follows: (In thousands) Securities Available for Sale and Interest-only Strips Net Investment Hedges Foreign Currency Translation Adjustment Recognized Postretirement Prior Service Cost Total At or For the Quarter Ended September 30, 2017: Balance, beginning of period $ (13,491 ) $ 5,031 $ (9,176 ) $ 133 $ (17,503 ) Other comprehensive income (loss) 3,082 (1,682 ) 2,939 — 4,339 Amounts reclassified from accumulated other comprehensive income (loss) (637 ) — — (8 ) (645 ) Net other comprehensive income (loss) 2,445 (1,682 ) 2,939 (8 ) 3,694 Balance, end of period $ (11,046 ) $ 3,349 $ (6,237 ) $ 125 $ (13,809 ) At or For the Quarter Ended September 30, 2016: Balance, beginning of period $ 15,898 $ 5,019 $ (9,316 ) $ 162 $ 11,763 Other comprehensive income (loss) (4,728 ) 561 (957 ) — (5,124 ) Amounts reclassified from accumulated other comprehensive income (loss) 264 — — (8 ) 256 Net other comprehensive income (loss) (4,464 ) 561 (957 ) (8 ) (4,868 ) Balance, end of period $ 11,434 $ 5,580 $ (10,273 ) $ 154 $ 6,895 (In thousands) Securities Available for Sale and Interest-only Strips Net Investment Hedges Foreign Currency Translation Adjustment Recognized Postretirement Prior Service Cost Total At or For the Nine Months Ended September 30, 2017: Balance, beginning of period $ (28,601 ) $ 6,493 $ (11,764 ) $ 147 $ (33,725 ) Other comprehensive income (loss) 17,703 (3,144 ) 5,527 — 20,086 Amounts reclassified from accumulated other comprehensive income (loss) (148 ) — — (22 ) (170 ) Net other comprehensive income (loss) 17,555 (3,144 ) 5,527 (22 ) 19,916 Balance, end of period $ (11,046 ) $ 3,349 $ (6,237 ) $ 125 $ (13,809 ) At or For the Nine Months Ended September 30, 2016: Balance, beginning of period $ (9,707 ) $ 7,249 $ (13,064 ) $ 176 $ (15,346 ) Other comprehensive income (loss) 20,243 (1,669 ) 2,791 — 21,365 Amounts reclassified from accumulated other comprehensive income (loss) 898 — — (22 ) 876 Net other comprehensive income (loss) 21,141 (1,669 ) 2,791 (22 ) 22,241 Balance, end of period $ 11,434 $ 5,580 $ (10,273 ) $ 154 $ 6,895

Basis of Presentation (Details)

Basis of Presentation (Details) - Accounting Standards Update 2016-09 $ in Millions	Sep. 30, 2017USD ($)
Retained Earnings
Change in Accounting Principle
Change in accounting principle	$ (1.3)
Additional Paid-in Capital
Change in Accounting Principle
Change in accounting principle	$ 1.3

Cash and Due from Banks (Detail

Cash and Due from Banks (Details) - USD ($) $ in Millions	Sep. 30, 2017	Dec. 31, 2016
Cash and Cash Equivalents [Abstract]
Reserve in cash on hand or at the Federal Reserve as required by Federal Reserve regulations	$ 108.2	$ 103.7
Total restricted cash balance	38.8	51.3
Cash held in interest-bearing accounts	$ 429	$ 326.5

Securities Available for Sale46

Securities Available for Sale and Securities Held to Maturity (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Securities available for sale:
Amortized Cost	$ 1,603,343,000		$ 1,603,343,000		$ 1,456,712,000
Gross Unrealized Gains	9,749,000		9,749,000		817,000
Gross Unrealized Losses	14,929,000		14,929,000		34,094,000
Fair Value	1,598,163,000		1,598,163,000		1,423,435,000
Gains (losses) on securities, net	189,000	$ (600,000)	189,000	$ (716,000)
Securities available for sale sold during the period	0	0	0	0
Impairment charges on securities available for sale	0	0	0	0
Securities held to maturity:
Amortized Cost	165,315,000		165,315,000		181,314,000
Gross Unrealized Gains	5,068,000		5,068,000		3,072,000
Gross Unrealized Losses	281,000		281,000		440,000
Fair Value	170,102,000		170,102,000		183,946,000
Recoveries on previously impaired securities held to maturity	200,000		(200,000)
Impairment charges on securities held to maturity		$ 600,000		$ 700,000
Mortgage-backed securities:
Securities available for sale:
Securities available for sale pledged as collateral	1,100,000		1,100,000		7,500,000
U.S. Government sponsored enterprises and federal agencies
Securities available for sale:
Amortized Cost	838,801,000		838,801,000		827,722,000
Gross Unrealized Gains	1,040,000		1,040,000		423,000
Gross Unrealized Losses	9,220,000		9,220,000		17,254,000
Fair Value	830,621,000		830,621,000		810,891,000
Securities held to maturity:
Amortized Cost	162,515,000		162,515,000		178,514,000
Gross Unrealized Gains	5,068,000		5,068,000		3,072,000
Gross Unrealized Losses	281,000		281,000		440,000
Fair Value	167,302,000		167,302,000		181,146,000
Mortgage-backed securities, Other
Securities available for sale:
Amortized Cost	8,000		8,000		18,000
Gross Unrealized Gains	0		0		0
Gross Unrealized Losses	0		0		0
Fair Value	8,000		8,000		18,000
Obligations of states and political subdivisions
Securities available for sale:
Amortized Cost	764,534,000		764,534,000		628,972,000
Gross Unrealized Gains	8,709,000		8,709,000		394,000
Gross Unrealized Losses	5,709,000		5,709,000		16,840,000
Fair Value	767,534,000		767,534,000		612,526,000
Other securities
Securities held to maturity:
Amortized Cost	2,800,000		2,800,000		2,800,000
Gross Unrealized Gains	0		0		0
Gross Unrealized Losses	0		0		0
Fair Value	$ 2,800,000		$ 2,800,000		$ 2,800,000

Securities Available for Sale47

Securities Available for Sale and Securities Held to Maturity (Details 2) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Gross unrealized losses and fair value of securities available for sale that are in a loss position
Less than 12 months, Fair Value	$ 534,633	$ 1,234,344
Less than 12 months, Unrealized Losses	4,757	34,094
12 months or more, Fair Value	411,269	0
12 months or more, Unrealized Losses	10,172	0
Total, Fair Value	945,902	1,234,344
Total, Unrealized Losses	14,929	34,094
Gross unrealized losses and fair value of securities held to maturity that are in a loss position
Less than 12 months, Fair Value	17,988	27,090
Less than 12 months, Unrealized Losses	142	440
12 months or more, Fair Value	4,808	0
12 months or more, Unrealized Losses	139	0
Total, Fair Value	22,796	27,090
Total, Unrealized Losses	281	440
U.S. Government sponsored enterprises and federal agencies
Gross unrealized losses and fair value of securities available for sale that are in a loss position
Less than 12 months, Fair Value	405,892	732,724
Less than 12 months, Unrealized Losses	3,936	17,254
12 months or more, Fair Value	207,494	0
12 months or more, Unrealized Losses	5,284	0
Total, Fair Value	613,386	732,724
Total, Unrealized Losses	9,220	17,254
Gross unrealized losses and fair value of securities held to maturity that are in a loss position
Less than 12 months, Fair Value	17,988	27,090
Less than 12 months, Unrealized Losses	142	440
12 months or more, Fair Value	4,808	0
12 months or more, Unrealized Losses	139	0
Total, Fair Value	22,796	27,090
Total, Unrealized Losses	281	440
Obligations of states and political subdivisions
Gross unrealized losses and fair value of securities available for sale that are in a loss position
Less than 12 months, Fair Value	128,741	501,620
Less than 12 months, Unrealized Losses	821	16,840
12 months or more, Fair Value	203,775	0
12 months or more, Unrealized Losses	4,888	0
Total, Fair Value	332,516	501,620
Total, Unrealized Losses	$ 5,709	$ 16,840

Securities Available for Sale48

Securities Available for Sale and Securities Held to Maturity (Details 3) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Amortized cost, securities available for sale
Due in one year or less	$ 8	$ 1
Due in 1-5 years	9,547	18
Due in 5-10 years	448,223	331,430
Due after 10 years	1,145,565	1,125,263
Amortized Cost	1,603,343	1,456,712
Fair value, securities available for sale
Due in one year or less	8	1
Due in 1-5 years	9,757	18
Due in 5-10 years	453,761	329,005
Due after 10 years	1,134,637	1,094,411
Fair Value	1,598,163	1,423,435
Amortized cost, securities held to maturity
Due in one year or less	1,000	0
Due in 1-5 years	400	1,400
Due in 5-10 years	1,400	1,400
Due after 10 years	162,515	178,514
Amortized Cost	165,315	181,314
Fair value, securities held to maturity
Due in one year or less	1,000	0
Due in 1-5 years	400	1,400
Due in 5-10 years	1,400	1,400
Due after 10	167,302	181,146
Fair Value	$ 170,102	$ 183,946

Securities Available for Sale49

Securities Available for Sale and Securities Held to Maturity (Details 4) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Interest Income on Securities Available for Sale by Taxable Status
Total interest income, securities available for sale	$ 8,486	$ 7,126	$ 24,518	$ 19,020
Securities available for sale
Interest Income on Securities Available for Sale by Taxable Status
Taxable interest income	4,619	4,167	13,707	11,838
Tax-exempt interest income	3,867	2,959	10,811	7,182
Total interest income, securities available for sale	$ 8,486	$ 7,126	$ 24,518	$ 19,020

Loans and Leases (Details)

Loans and Leases (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Loans and Leases Receivable Disclosure
Loans and leases	$ 18,988,352	$ 17,843,827
Loan and lease adjustments	43,200	54,100
Consumer real estate
Loans and Leases Receivable Disclosure
Loans and leases	4,930,812	5,084,352
Commercial
Loans and Leases Receivable Disclosure
Loans and leases	3,489,680	3,286,478
Commercial | Commercial real estate
Loans and Leases Receivable Disclosure
Loans and leases	2,711,668	2,634,191
Commercial | Permanent
Loans and Leases Receivable Disclosure
Loans and leases	2,373,001	2,356,287
Commercial | Construction and development
Loans and Leases Receivable Disclosure
Loans and leases	338,667	277,904
Commercial | Commercial business
Loans and Leases Receivable Disclosure
Loans and leases	778,012	652,287
Leasing and equipment finance
Loans and Leases Receivable Disclosure
Loans and leases	4,730,931	4,336,310
Inventory finance
Loans and Leases Receivable Disclosure
Loans and leases	2,576,077	2,470,175
Auto finance
Loans and Leases Receivable Disclosure
Loans and leases	3,240,413	2,647,741
Other
Loans and Leases Receivable Disclosure
Loans and leases	20,439	18,771
First mortgage lien | Consumer real estate
Loans and Leases Receivable Disclosure
Loans and leases	1,953,199	2,292,596
Junior lien | Consumer real estate
Loans and Leases Receivable Disclosure
Loans and leases	$ 2,977,613	$ 2,791,756

Loans and Leases (Details 2)

Loans and Leases (Details 2) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Consumer Real Estate Loan
Accounts, Notes, Loans and Financing Receivable
Sales proceeds, net	$ 300,038,000	$ 450,666,000	$ 971,755,000	$ 1,129,251,000
Securitization receivable				0
Interest-only strips, initial value	542,000	2,513,000	2,458,000	13,426,000
Recorded investment in loans sold, including accrued interest	(292,267,000)	(438,900,000)	(947,735,000)	(1,107,327,000)
Net gains	8,313,000	14,279,000	26,478,000	35,350,000
Consumer real estate non-accrual loans sold	21,800,000		71,200,000
Servicing asset	0		0		$ 0
Servicing liability	0		0		0
Auto Finance
Accounts, Notes, Loans and Financing Receivable
Sales proceeds, net	0	631,511,000	302,616,000	1,614,213,000
Securitization receivable				18,620,000
Interest-only strips, initial value	0	0	0	5,695,000
Recorded investment in loans sold, including accrued interest	0	(619,324,000)	(298,581,000)	(1,603,413,000)
Net gains	0	12,187,000	4,035,000	35,115,000
Servicing asset	0		0		0
Servicing liability	0		0		$ 0
Loans | Auto Finance
Accounts, Notes, Loans and Financing Receivable
Sales proceeds, net	0	105,766,000	302,616,000	688,227,000
Securitization receivable				0
Interest-only strips, initial value	0	0	0	5,695,000
Recorded investment in loans sold, including accrued interest	0	(100,009,000)	(298,581,000)	(669,775,000)
Net gains	0	5,757,000	4,035,000	24,147,000
Securitizations | Auto Finance
Accounts, Notes, Loans and Financing Receivable
Sales proceeds, net	0	525,745,000	0	925,986,000
Securitization receivable				18,620,000
Interest-only strips, initial value	0	0	0	0
Recorded investment in loans sold, including accrued interest	0	(519,315,000)	0	(933,638,000)
Net gains	$ 0	$ 6,430,000	$ 0	$ 10,968,000

Loans and Leases (Details 3)

Loans and Leases (Details 3) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Consumer Real Estate Loan
Accounts, Notes, Loans and Financing Receivable
Interest-only strips	$ 17,445		$ 17,445		$ 27,260
Contractual liabilities related to sale of loans	1,082		1,082		701
Impairment related to consumer real estate interest-only strips	0	$ 200	900	$ 800
Auto finance
Accounts, Notes, Loans and Financing Receivable
Interest-only strips	6,352		6,352		12,892
Contractual liabilities related to sale of loans	0		0		$ 168
Impairment related to auto finance interest-only strips	$ 200	$ 2,300	$ 400	$ 2,300

Loans and Leases (Details 4)

Loans and Leases (Details 4) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Sep. 29, 2017
Loans and Leases Receivable Disclosure
Purchased loans and leases at fair value	$ 624.6	$ 17.5	$ 631.5	$ 17.5
Leasing and equipment finance
Purchased Credit Impaired Loans (PCI)
Purchased credit impaired loans					$ 14
Contractually required payments receivable of purchased credit impaired loans					24
Expected cash flows of purchased credit impaired loans					16.6
Nonaccretable difference of purchased credit impaired loans					7.4
Initial accretable yield of purchased credit impaired loans					$ 2.6

Allowance for Loan and Lease 54

Allowance for Loan and Lease Losses and Credit Quality Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Allowance for loan and lease losses
Balance, beginning of period	$ 165,620	$ 158,572	$ 160,269	$ 156,054
Charge-offs	(17,999)	(16,244)	(55,227)	(47,634)
Recoveries	9,847	4,779	29,072	14,132
Net (charge-offs) recoveries	(8,152)	(11,465)	(26,155)	(33,502)
Provision for credit losses	14,545	13,894	46,184	45,986
Other	(3,769)	(5,160)	(12,054)	(12,697)
Balance, end of period	168,244	155,841	168,244	155,841
Consumer Real Estate
Allowance for loan and lease losses
Balance, beginning of period	52,408	64,765	59,448	67,992
Charge-offs	(2,940)	(4,058)	(9,205)	(14,550)
Recoveries	6,392	1,838	18,783	5,094
Net (charge-offs) recoveries	3,452	(2,220)	9,578	(9,456)
Provision for credit losses	(5,669)	1,402	(13,553)	8,963
Other	(2,353)	(1,855)	(7,635)	(5,407)
Balance, end of period	47,838	62,092	47,838	62,092
Commercial
Allowance for loan and lease losses
Balance, beginning of period	34,669	31,161	32,695	30,185
Charge-offs	0	(4)	(5,431)	(668)
Recoveries	196	80	455	330
Net (charge-offs) recoveries	196	76	(4,976)	(338)
Provision for credit losses	1,479	411	8,625	1,801
Other	0	0	0	0
Balance, end of period	36,344	31,648	36,344	31,648
Leasing and Equipment Finance
Allowance for loan and lease losses
Balance, beginning of period	21,922	20,124	21,350	19,018
Charge-offs	(1,404)	(2,513)	(5,694)	(6,125)
Recoveries	358	671	1,718	1,834
Net (charge-offs) recoveries	(1,046)	(1,842)	(3,976)	(4,291)
Provision for credit losses	1,967	2,367	5,520	5,922
Other	(72)	0	(123)	0
Balance, end of period	22,771	20,649	22,771	20,649
Inventory Finance
Allowance for loan and lease losses
Balance, beginning of period	12,129	12,084	13,932	11,128
Charge-offs	(750)	(697)	(1,856)	(2,084)
Recoveries	281	129	675	696
Net (charge-offs) recoveries	(469)	(568)	(1,181)	(1,388)
Provision for credit losses	240	335	(903)	1,925
Other	78	(44)	130	142
Balance, end of period	11,978	11,807	11,978	11,807
Auto Finance
Allowance for loan and lease losses
Balance, beginning of period	43,893	29,772	32,310	26,486
Charge-offs	(11,028)	(6,756)	(28,045)	(18,683)
Recoveries	1,780	999	4,680	2,743
Net (charge-offs) recoveries	(9,248)	(5,757)	(23,365)	(15,940)
Provision for credit losses	15,437	8,361	44,141	26,001
Other	(1,422)	(3,261)	(4,426)	(7,432)
Balance, end of period	48,660	29,115	48,660	29,115
Other
Allowance for loan and lease losses
Balance, beginning of period	599	666	534	1,245
Charge-offs	(1,877)	(2,216)	(4,996)	(5,524)
Recoveries	840	1,062	2,761	3,435
Net (charge-offs) recoveries	(1,037)	(1,154)	(2,235)	(2,089)
Provision for credit losses	1,091	1,018	2,354	1,374
Other	0	0	0	0
Balance, end of period	$ 653	$ 530	$ 653	$ 530

Allowance for Loan and Lease 55

Allowance for Loan and Lease Losses and Credit Quality Information (Details 2) - USD ($) $ in Thousands	Sep. 30, 2017	Jun. 30, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Dec. 31, 2015
Allowance for loan and lease losses:
Collectively evaluated for impairment	$ 143,781		$ 131,569
Individually evaluated for impairment	24,463		28,700
Total	168,244	$ 165,620	160,269	$ 155,841	$ 158,572	$ 156,054
Loans and leases outstanding:
Collectively evaluated for impairment	18,758,237		17,569,357
Individually evaluated for impairment	216,155		274,453
Loans acquired with deteriorated credit quality	13,960		17
Total loans and leases	18,988,352		17,843,827
Consumer Real Estate
Allowance for loan and lease losses:
Collectively evaluated for impairment	29,042		36,103
Individually evaluated for impairment	18,796		23,345
Total	47,838	52,408	59,448	62,092	64,765	67,992
Loans and leases outstanding:
Collectively evaluated for impairment	4,784,528		4,884,653
Individually evaluated for impairment	146,284		199,699
Loans acquired with deteriorated credit quality	0		0
Total loans and leases	4,930,812		5,084,352
Commercial
Allowance for loan and lease losses:
Collectively evaluated for impairment	35,342		31,430
Individually evaluated for impairment	1,002		1,265
Total	36,344	34,669	32,695	31,648	31,161	30,185
Loans and leases outstanding:
Collectively evaluated for impairment	3,457,229		3,242,389
Individually evaluated for impairment	32,451		44,089
Loans acquired with deteriorated credit quality	0		0
Total loans and leases	3,489,680		3,286,478
Leasing and Equipment Finance
Allowance for loan and lease losses:
Collectively evaluated for impairment	19,049		19,093
Individually evaluated for impairment	3,722		2,257
Total	22,771	21,922	21,350	20,649	20,124	19,018
Loans and leases outstanding:
Collectively evaluated for impairment	4,692,676		4,320,129
Individually evaluated for impairment	24,295		16,165
Loans acquired with deteriorated credit quality	13,960		16
Total loans and leases	4,730,931		4,336,310
Inventory Finance
Allowance for loan and lease losses:
Collectively evaluated for impairment	11,462		13,304
Individually evaluated for impairment	516		628
Total	11,978	12,129	13,932	11,807	12,084	11,128
Loans and leases outstanding:
Collectively evaluated for impairment	2,572,899		2,465,041
Individually evaluated for impairment	3,178		5,134
Loans acquired with deteriorated credit quality	0		0
Total loans and leases	2,576,077		2,470,175
Auto finance
Allowance for loan and lease losses:
Collectively evaluated for impairment	48,234		31,106
Individually evaluated for impairment	426		1,204
Total	48,660	43,893	32,310	29,115	29,772	26,486
Loans and leases outstanding:
Collectively evaluated for impairment	3,230,469		2,638,380
Individually evaluated for impairment	9,944		9,360
Loans acquired with deteriorated credit quality	0		1
Total loans and leases	3,240,413		2,647,741
Other
Allowance for loan and lease losses:
Collectively evaluated for impairment	652		533
Individually evaluated for impairment	1		1
Total	653	$ 599	534	$ 530	$ 666	$ 1,245
Loans and leases outstanding:
Collectively evaluated for impairment	20,436		18,765
Individually evaluated for impairment	3		6
Loans acquired with deteriorated credit quality	0		0
Total loans and leases	$ 20,439		$ 18,771

Allowance for Loan and Lease 56

Allowance for Loan and Lease Losses and Credit Quality Information (Details 3) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Financing Receivable, Recorded Investment, Past Due
Current-59 Days Delinquent and Accruing	$ 18,844,601	$ 17,641,553
60 to 89 Days Delinquent and Accruing	15,746	15,278
90 Days or More Delinquent and Accruing	8,386	5,551
Total Accruing	18,868,733	17,662,382
Non-accrual	119,619	181,445
Total loans and leases	18,988,352	17,843,827
Portfolios acquired with deteriorated credit quality
Financing Receivable, Recorded Investment, Past Due
Current-59 Days Delinquent and Accruing	12,644	113
60 to 89 Days Delinquent and Accruing	0	0
90 Days or More Delinquent and Accruing	1,316	0
Total Accruing	13,960	113
Non-accrual	0	0
Total loans and leases	13,960	113
Consumer real estate
Financing Receivable, Recorded Investment, Past Due
Current-59 Days Delinquent and Accruing	4,842,641	4,921,752
60 to 89 Days Delinquent and Accruing	6,053	7,985
90 Days or More Delinquent and Accruing	1,387	2,144
Total Accruing	4,850,081	4,931,881
Non-accrual	80,731	152,471
Total loans and leases	4,930,812	5,084,352
Consumer real estate | First mortgage lien
Financing Receivable, Recorded Investment, Past Due
Current-59 Days Delinquent and Accruing	1,884,543	2,177,746
60 to 89 Days Delinquent and Accruing	4,607	6,581
90 Days or More Delinquent and Accruing	1,387	2,144
Total Accruing	1,890,537	2,186,471
Non-accrual	62,662	106,125
Total loans and leases	1,953,199	2,292,596
Consumer real estate | Junior lien
Financing Receivable, Recorded Investment, Past Due
Current-59 Days Delinquent and Accruing	2,958,098	2,744,006
60 to 89 Days Delinquent and Accruing	1,446	1,404
90 Days or More Delinquent and Accruing	0	0
Total Accruing	2,959,544	2,745,410
Non-accrual	18,069	46,346
Total loans and leases	2,977,613	2,791,756
Commercial
Financing Receivable, Recorded Investment, Past Due
Current-59 Days Delinquent and Accruing	3,479,341	3,280,559
60 to 89 Days Delinquent and Accruing	2	0
90 Days or More Delinquent and Accruing	0	0
Total Accruing	3,479,343	3,280,559
Non-accrual	10,337	5,919
Total loans and leases	3,489,680	3,286,478
Commercial | Commercial real estate
Financing Receivable, Recorded Investment, Past Due
Current-59 Days Delinquent and Accruing	2,701,331	2,628,627
60 to 89 Days Delinquent and Accruing	0	0
90 Days or More Delinquent and Accruing	0	0
Total Accruing	2,701,331	2,628,627
Non-accrual	10,337	5,564
Total loans and leases	2,711,668	2,634,191
Commercial | Commercial business
Financing Receivable, Recorded Investment, Past Due
Current-59 Days Delinquent and Accruing	778,010	651,932
60 to 89 Days Delinquent and Accruing	2	0
90 Days or More Delinquent and Accruing	0	0
Total Accruing	778,012	651,932
Non-accrual	0	355
Total loans and leases	778,012	652,287
Leasing and equipment finance
Financing Receivable, Recorded Investment, Past Due
Current-59 Days Delinquent and Accruing	4,691,029	4,320,795
60 to 89 Days Delinquent and Accruing	4,783	3,478
90 Days or More Delinquent and Accruing	2,439	1,045
Total Accruing	4,698,251	4,325,318
Non-accrual	18,720	10,880
Total loans and leases	4,716,971	4,336,198
Inventory finance
Financing Receivable, Recorded Investment, Past Due
Current-59 Days Delinquent and Accruing	2,572,764	2,464,986
60 to 89 Days Delinquent and Accruing	58	16
90 Days or More Delinquent and Accruing	77	39
Total Accruing	2,572,899	2,465,041
Non-accrual	3,178	5,134
Total loans and leases	2,576,077	2,470,175
Auto finance
Financing Receivable, Recorded Investment, Past Due
Current-59 Days Delinquent and Accruing	3,225,757	2,634,600
60 to 89 Days Delinquent and Accruing	4,840	3,785
90 Days or More Delinquent and Accruing	3,163	2,317
Total Accruing	3,233,760	2,640,702
Non-accrual	6,653	7,038
Total loans and leases	3,240,413	2,647,740
Other
Financing Receivable, Recorded Investment, Past Due
Current-59 Days Delinquent and Accruing	20,425	18,748
60 to 89 Days Delinquent and Accruing	10	14
90 Days or More Delinquent and Accruing	4	6
Total Accruing	20,439	18,768
Non-accrual	0	3
Total loans and leases	20,439	18,771
Total loans and leases excluding portfolios acquired with deteriorated credit quality
Financing Receivable, Recorded Investment, Past Due
Current-59 Days Delinquent and Accruing	18,831,957	17,641,440
60 to 89 Days Delinquent and Accruing	15,746	15,278
90 Days or More Delinquent and Accruing	7,070	5,551
Total Accruing	18,854,773	17,662,269
Non-accrual	119,619	181,445
Total loans and leases	$ 18,974,392	$ 17,843,714

Allowance for Loan and Lease 57

Allowance for Loan and Lease Losses and Credit Quality Information Allowance for Loan and Lease Losses and Credit Quality Information (Details 4) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Loans and Leases Receivable Impaired Contractual Interest Due and Interest Recognized on Nonaccrual Loans [Abstract]
Contractual interest due on non-accrual loans and leases	$ 3,529	$ 5,127	$ 11,606	$ 15,604
Interest income recognized on non-accrual loans and leases	581	1,048	2,274	3,097
Unrecognized interest income	$ 2,948	$ 4,079	$ 9,332	$ 12,507

Allowance for Loan and Lease 58

Allowance for Loan and Lease Losses and Credit Quality Information Allowance for Loan and Lease Losses and Credit Quality Information (Details 5) - Consumer real estate - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Consumer Real Estate Loans to Customers Involved in Bankruptcy
0-59 days delinquent and accruing	$ 9,164	$ 13,675
Non-accrual	11,017	21,372
Total consumer real estate loans to customers in bankruptcy	$ 20,181	$ 35,047

Allowance for Loan and Lease 59

Allowance for Loan and Lease Losses and Credit Quality Information (Details 6) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Loan Modifications for Borrowers with Financial Difficulties
Accruing TDR Loans	$ 103,940		$ 103,940		$ 126,041
Non-accrual TDR Loans	45,588		45,588		81,342
Total TDR loans	149,528		149,528		207,383
Unfunded commitments to consumer real estate and commercial loans classified as TDRs	400		400		400
Consumer real estate
Loan Modifications for Borrowers with Financial Difficulties
Accruing TDR Loans	90,753		90,753		98,606
Non-accrual TDR Loans	33,854		33,854		71,961
Total TDR loans	$ 124,607		$ 124,607		170,567
Average yield on TDR loans (as a percent)	4.30%	4.30%	4.20%	4.20%
Contractual average rate of TDR loans (as a percent)	6.80%	6.70%	6.70%	6.70%
Allowance on accruing TDR loans	$ 17,600		$ 17,600		$ 19,300
Allowance on accruing TDR loans (as a percent)	19.40%		19.40%		19.60%
Assumed remaining re-default rate used in determining impairment, low end of range (as a percent)	9.00%		9.00%		10.00%
Assumed remaining re-default rate used in determining impairment, high end of range (as a percent)	33.00%		33.00%		33.00%
Percent of accruing TDR loans more than 60 days delinquent	1.30%		1.30%		1.50%
Delinquency period of performing loans and leases			60 days		60 days
Maximum period past due to be considered accruing status for consumer real estate TDR loans			90 days		90 days
Portion of non-accrual TDR balance, loans discharged in Chapter 7 bankruptcy that are not reaffirmed	$ 22,000		$ 22,000		$ 47,400
Portion of non-accrual TDR balance, loans discharged in Chapter 7 bankruptcy that are not reaffirmed (as a percent)	65.10%		65.10%		65.90%
Portion of non-accrual TDR balance, loans discharged in Chapter 7 bankruptcy that are not reaffirmed, current (as a percent)	70.40%		70.40%		82.20%
Consumer real estate | First mortgage lien
Loan Modifications for Borrowers with Financial Difficulties
Unrecognized Interest Income	$ 400	$ 500	$ 1,400	$ 1,500
Consumer real estate | Junior lien
Loan Modifications for Borrowers with Financial Difficulties
Unrecognized Interest Income	100	$ 200	500	$ 500
Commercial
Loan Modifications for Borrowers with Financial Difficulties
Accruing TDR Loans	4,677		4,677		$ 20,304
Non-accrual TDR Loans	3,491		3,491		2,170
Total TDR loans	8,168		8,168		22,474
Allowance on accruing TDR loans	$ 100		$ 100		$ 1,100
Allowance on accruing TDR loans (as a percent)	0.10%		0.10%		5.60%
Delinquency period of performing loans and leases			60 days		60 days
Leasing and equipment finance
Loan Modifications for Borrowers with Financial Difficulties
Accruing TDR Loans	$ 5,215		$ 5,215		$ 4,802
Non-accrual TDR Loans	2,591		2,591		1,350
Total TDR loans	7,806		7,806		6,152
Inventory finance
Loan Modifications for Borrowers with Financial Difficulties
Accruing TDR Loans	0		0		0
Non-accrual TDR Loans	911		911		357
Total TDR loans	911		911		357
Auto finance
Loan Modifications for Borrowers with Financial Difficulties
Accruing TDR Loans	3,290		3,290		2,323
Non-accrual TDR Loans	4,741		4,741		5,504
Total TDR loans	8,031		8,031		7,827
Other
Loan Modifications for Borrowers with Financial Difficulties
Accruing TDR Loans	5		5		6
Non-accrual TDR Loans	0		0		0
Total TDR loans	$ 5		$ 5		$ 6

Allowance for Loan and Lease 60

Allowance for Loan and Lease Losses and Credit Quality Information (Details 7) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Loan Modifications for Borrowers with Financial Difficulties
Minimum period for loans to be delinquent to be considered in default			90 days	90 days
Defaulted TDR loan balance modified during the period	$ 1,884	$ 2,663	$ 11,029	$ 8,544
Consumer real estate
Loan Modifications for Borrowers with Financial Difficulties
Defaulted TDR loan balance modified during the period	1,173	2,329	2,846	7,311
Consumer real estate | First mortgage lien
Loan Modifications for Borrowers with Financial Difficulties
Defaulted TDR loan balance modified during the period	856	2,150	2,328	6,635
Consumer real estate | Junior lien
Loan Modifications for Borrowers with Financial Difficulties
Defaulted TDR loan balance modified during the period	317	179	518	676
Commercial | Commercial real estate
Loan Modifications for Borrowers with Financial Difficulties
Defaulted TDR loan balance modified during the period	0	0	6,681	0
Leasing and equipment finance
Loan Modifications for Borrowers with Financial Difficulties
Defaulted TDR loan balance modified during the period	451	0	635	0
Auto Finance
Loan Modifications for Borrowers with Financial Difficulties
Defaulted TDR loan balance modified during the period	$ 260	$ 334	$ 867	$ 1,233

Allowance for Loan and Lease 61

Allowance for Loan and Lease Losses and Credit Quality Information (Details 8) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Impaired Loans
Unpaid Contractual Balance with an Allowance Recorded	$ 147,486		$ 147,486		$ 215,346
Unpaid Contractual Balance without an Allowance Recorded	55,857		55,857		72,180
Total Unpaid Contractual Balance	203,343		203,343		287,526
Loan Balance with an Allowance Recorded	134,505		134,505		185,790
Loan Balance without an Allowance Recorded	29,706		29,706		33,867
Total Loan Balance	164,211		164,211		219,657
Related Allowance Recorded	22,322		22,322		26,728
Average Loan Balance with an Allowance Recorded	139,407	$ 200,058	160,148	$ 195,570
Average Loan Balance without an Allowance Recorded	32,097	30,915	31,786	38,053
Total Average Loan Balance	171,504	230,973	191,934	233,623
Interest Income Recognized with an Allowance Recorded	1,144	1,765	3,720	5,119
Interest Income Recognized without an Allowance Recorded	442	495	1,705	1,388
Total Interest Income Recognized	1,586	2,260	5,425	6,507
Consumer real estate
Impaired Loans
Unpaid Contractual Balance with an Allowance Recorded	123,797		123,797		185,185
Unpaid Contractual Balance without an Allowance Recorded	33,508		33,508		45,454
Loan Balance with an Allowance Recorded	111,136		111,136		156,011
Loan Balance without an Allowance Recorded	13,471		13,471		14,556
Related Allowance Recorded	18,511		18,511		22,664
Average Loan Balance with an Allowance Recorded	117,564	169,617	133,573	172,139
Average Loan Balance without an Allowance Recorded	13,540	9,371	14,013	9,648
Interest Income Recognized with an Allowance Recorded	1,061	1,619	3,306	4,755
Interest Income Recognized without an Allowance Recorded	283	290	1,128	713
Consumer real estate | First mortgage lien
Impaired Loans
Unpaid Contractual Balance with an Allowance Recorded	90,190		90,190		122,704
Unpaid Contractual Balance without an Allowance Recorded	17,150		17,150		18,539
Loan Balance with an Allowance Recorded	80,379		80,379		104,601
Loan Balance without an Allowance Recorded	11,855		11,855		12,674
Related Allowance Recorded	14,272		14,272		16,835
Average Loan Balance with an Allowance Recorded	84,126	114,966	92,490	116,315
Average Loan Balance without an Allowance Recorded	11,871	8,023	12,264	8,280
Interest Income Recognized with an Allowance Recorded	679	944	2,097	2,762
Interest Income Recognized without an Allowance Recorded	212	120	736	228
Consumer real estate | Junior lien
Impaired Loans
Unpaid Contractual Balance with an Allowance Recorded	33,607		33,607		62,481
Unpaid Contractual Balance without an Allowance Recorded	16,358		16,358		26,915
Loan Balance with an Allowance Recorded	30,757		30,757		51,410
Loan Balance without an Allowance Recorded	1,616		1,616		1,882
Related Allowance Recorded	4,239		4,239		5,829
Average Loan Balance with an Allowance Recorded	33,438	54,651	41,083	55,824
Average Loan Balance without an Allowance Recorded	1,669	1,348	1,749	1,368
Interest Income Recognized with an Allowance Recorded	382	675	1,209	1,993
Interest Income Recognized without an Allowance Recorded	71	170	392	485
Commercial
Impaired Loans
Unpaid Contractual Balance with an Allowance Recorded	6,866		6,866		10,097
Unpaid Contractual Balance without an Allowance Recorded	11,970		11,970		21,955
Loan Balance with an Allowance Recorded	6,859		6,859		10,089
Loan Balance without an Allowance Recorded	8,155		8,155		16,134
Related Allowance Recorded	1,002		1,002		1,265
Average Loan Balance with an Allowance Recorded	5,132	12,941	8,474	6,545
Average Loan Balance without an Allowance Recorded	12,424	18,970	12,144	26,316
Interest Income Recognized with an Allowance Recorded	0	100	64	230
Interest Income Recognized without an Allowance Recorded	97	170	441	606
Commercial | Commercial real estate
Impaired Loans
Unpaid Contractual Balance with an Allowance Recorded	6,853		6,853		10,083
Unpaid Contractual Balance without an Allowance Recorded	11,755		11,755		21,601
Loan Balance with an Allowance Recorded	6,846		6,846		10,075
Loan Balance without an Allowance Recorded	7,940		7,940		15,780
Related Allowance Recorded	1,000		1,000		1,262
Average Loan Balance with an Allowance Recorded	5,119	12,926	8,461	6,530
Average Loan Balance without an Allowance Recorded	12,090	15,101	11,860	22,729
Interest Income Recognized with an Allowance Recorded	0	100	16	230
Interest Income Recognized without an Allowance Recorded	95	170	438	606
Commercial | Commercial business
Impaired Loans
Unpaid Contractual Balance with an Allowance Recorded	13		13		14
Unpaid Contractual Balance without an Allowance Recorded	215		215		354
Loan Balance with an Allowance Recorded	13		13		14
Loan Balance without an Allowance Recorded	215		215		354
Related Allowance Recorded	2		2		3
Average Loan Balance with an Allowance Recorded	13	15	13	15
Average Loan Balance without an Allowance Recorded	334	3,869	284	3,587
Interest Income Recognized with an Allowance Recorded	0	0	48	0
Interest Income Recognized without an Allowance Recorded	2	0	3	0
Leasing and equipment finance
Impaired Loans
Unpaid Contractual Balance with an Allowance Recorded	13,376		13,376		9,900
Loan Balance with an Allowance Recorded	13,376		13,376		9,900
Related Allowance Recorded	1,928		1,928		1,044
Average Loan Balance with an Allowance Recorded	11,837	10,844	11,638	8,963
Interest Income Recognized with an Allowance Recorded	10	3	28	21
Inventory finance
Impaired Loans
Unpaid Contractual Balance with an Allowance Recorded	1,871		1,871		4,357
Unpaid Contractual Balance without an Allowance Recorded	1,299		1,299		767
Loan Balance with an Allowance Recorded	1,874		1,874		4,365
Loan Balance without an Allowance Recorded	1,304		1,304		769
Related Allowance Recorded	516		516		628
Average Loan Balance with an Allowance Recorded	2,078	777	3,120	1,030
Average Loan Balance without an Allowance Recorded	1,255	333	1,037	332
Interest Income Recognized with an Allowance Recorded	18	10	176	41
Interest Income Recognized without an Allowance Recorded	62	35	136	69
Auto finance
Impaired Loans
Unpaid Contractual Balance with an Allowance Recorded	1,572		1,572		5,801
Unpaid Contractual Balance without an Allowance Recorded	8,993		8,993		3,919
Loan Balance with an Allowance Recorded	1,255		1,255		5,419
Loan Balance without an Allowance Recorded	6,776		6,776		2,408
Related Allowance Recorded	364		364		1,126
Average Loan Balance with an Allowance Recorded	2,792	5,871	3,337	6,883
Average Loan Balance without an Allowance Recorded	4,878	2,241	4,592	1,757
Interest Income Recognized with an Allowance Recorded	55	33	146	72
Interest Income Recognized without an Allowance Recorded	0	0	0	0
Other
Impaired Loans
Unpaid Contractual Balance with an Allowance Recorded	4		4		6
Unpaid Contractual Balance without an Allowance Recorded	87		87		85
Loan Balance with an Allowance Recorded	5		5		6
Loan Balance without an Allowance Recorded	0		0		0
Related Allowance Recorded	1		1		$ 1
Average Loan Balance with an Allowance Recorded	4	8	6	10
Interest Income Recognized with an Allowance Recorded	$ 0	$ 0	$ 0	$ 0

Investments in Affordable Hou62

Investments in Affordable Housing Limited Liability Entities (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Equity Method Investments and Joint Ventures [Abstract]
Investments in affordable housing limited liability entities	$ 76,034		$ 76,034		$ 30,279
Accrued expenses and other liabilities - unfunded commitments	39,782		39,782		$ 12,082
Tax credits and other tax benefits	$ 3,600	$ 1,600	$ 7,500	$ 5,500

Goodwill and Other Intangible63

Goodwill and Other Intangibles (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Goodwill and other intangible assets
Goodwill	$ 227,798,000		$ 227,798,000		$ 225,640,000
Impairment of goodwill and intangible assets	0	$ 0	0	$ 0
Amortizable intangible assets:
Gross Amount	31,969,000		31,969,000		10,669,000
Accumulated Amortization	10,122,000		10,122,000		8,961,000
Net Amount	21,847,000		21,847,000		1,708,000
Amortization expenses	800,000	$ 400,000	1,200,000	$ 1,100,000
Estimated amortization expense for intangible assets
Remainder of 2017	800,000		800,000
2,018	2,700,000		2,700,000
2,019	2,300,000		2,300,000
2,020	2,000,000		2,000,000
2,021	2,000,000		2,000,000
Program agreement
Amortizable intangible assets:
Gross Amount	14,700,000		14,700,000		0
Accumulated Amortization	26,000		26,000		0
Net Amount	14,674,000		14,674,000		0
Non-compete agreement
Amortizable intangible assets:
Gross Amount	10,590,000		10,590,000		4,590,000
Accumulated Amortization	5,155,000		5,155,000		4,590,000
Net Amount	5,435,000		5,435,000		0
Customer base intangibles
Amortizable intangible assets:
Gross Amount	3,330,000		3,330,000		2,730,000
Accumulated Amortization	2,407,000		2,407,000		2,002,000
Net Amount	923,000		923,000		728,000
Deposit base intangibles
Amortizable intangible assets:
Gross Amount	3,049,000		3,049,000		3,049,000
Accumulated Amortization	2,234,000		2,234,000		2,069,000
Net Amount	815,000		815,000		980,000
Tradename
Amortizable intangible assets:
Gross Amount	300,000		300,000		300,000
Accumulated Amortization	300,000		300,000		300,000
Net Amount	0		0		0
Operating segments | Consumer Banking
Goodwill and other intangible assets
Goodwill	214,286,000		214,286,000		214,286,000
Operating segments | Wholesale Banking
Goodwill and other intangible assets
Goodwill	$ 13,512,000		$ 13,512,000		$ 11,354,000

Goodwill and Other Intangible64

Goodwill and Other Intangibles (Details 2) - USD ($) $ in Thousands	Jun. 16, 2017	Sep. 30, 2017	Dec. 31, 2016
Assets acquired
Goodwill		$ 227,798	$ 225,640
Operating segments | Wholesale Banking
Assets acquired
Goodwill		$ 13,512	$ 11,354
Equipment Financing & Leasing Corporation
Business Acquisition
Percentage of outstanding shares acquired	100.00%
Cash paid upon closing	$ 9,000
Liability recorded	$ 5,900
Period in which liability recorded is to be paid (Years)	3 years
Liabilities assumed
EFLC debt assumed	$ 64,200
Assets acquired
Operating lease equipment	46,400
Direct financing leases	5,900
Finite-lived intangibles	21,300
Other assets, net	$ 3,300
Equipment Financing & Leasing Corporation | Program agreement
Assets acquired
Weighted average amortization period (Years)	15 years
Equipment Financing & Leasing Corporation | Non-compete agreement
Assets acquired
Weighted average amortization period (Years)	5 years
Equipment Financing & Leasing Corporation | Customer base intangibles
Assets acquired
Weighted average amortization period (Years)	3 years
Equipment Financing & Leasing Corporation | Operating segments | Wholesale Banking
Assets acquired
Goodwill	$ 2,200

Long-term Borrowings (Details)

Long-term Borrowings (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Debt instrument
Long-term borrowings	$ 1,382,588	$ 1,073,181
Federal Home Loan Bank advances
Debt instrument
FHLB advances, amount prepayable	1,000,000
Federal Home Loan Bank advances
Debt instrument
Long-term borrowings	1,000,000	675,000
Federal Home Loan Bank advances | TCF Bank
Debt instrument
Loans pledged as collateral	4,400,000
Federal Home Loan Bank advances | Maturity Year 2018
Debt instrument
Long-term borrowings	$ 0	$ 375,000
Stated Rate	0.00%
Federal Home Loan Bank advances | Maturity Year 2018 | Minimum
Debt instrument
Stated Rate		0.72%
Federal Home Loan Bank advances | Maturity Year 2018 | Maximum
Debt instrument
Stated Rate		0.81%
Federal Home Loan Bank advances | Maturity Year 2019
Debt instrument
Long-term borrowings	$ 1,000,000	$ 300,000
Federal Home Loan Bank advances | Maturity Year 2019 | Minimum
Debt instrument
Stated Rate	1.35%	0.78%
Federal Home Loan Bank advances | Maturity Year 2019 | Maximum
Debt instrument
Stated Rate	1.39%	0.81%
Subordinated bank notes
Debt instrument
Long-term borrowings	$ 256,265	$ 255,357
Subordinated bank notes | Maturity Year 2022
Debt instrument
Long-term borrowings	$ 108,813	$ 108,654
Stated Rate	6.25%	6.25%
Subordinated bank notes | Maturity Year 2025
Debt instrument
Long-term borrowings	$ 148,200	$ 148,052
Stated Rate	4.60%	4.60%
Subordinated bank notes | Maturity Year 2025, Interest Rate Swap
Debt instrument
Long-term borrowings	$ (748)	$ (1,349)
Discounted lease rentals
Debt instrument
Long-term borrowings	126,323	140,060
Discounted lease rentals | Maturity Year 2017
Debt instrument
Long-term borrowings	$ 15,221	$ 57,081
Discounted lease rentals | Maturity Year 2017 | Minimum
Debt instrument
Stated Rate	2.81%	2.45%
Discounted lease rentals | Maturity Year 2017 | Maximum
Debt instrument
Stated Rate	6.88%	7.88%
Discounted lease rentals | Maturity Year 2018
Debt instrument
Long-term borrowings	$ 50,332	$ 42,132
Discounted lease rentals | Maturity Year 2018 | Minimum
Debt instrument
Stated Rate	2.55%	2.55%
Discounted lease rentals | Maturity Year 2018 | Maximum
Debt instrument
Stated Rate	7.95%	7.95%
Discounted lease rentals | Maturity Year 2019
Debt instrument
Long-term borrowings	$ 32,680	$ 24,671
Discounted lease rentals | Maturity Year 2019 | Minimum
Debt instrument
Stated Rate	2.53%	2.53%
Discounted lease rentals | Maturity Year 2019 | Maximum
Debt instrument
Stated Rate	6.00%	6.00%
Discounted lease rentals | Maturity Year 2020
Debt instrument
Long-term borrowings	$ 17,601	$ 11,753
Discounted lease rentals | Maturity Year 2020 | Minimum
Debt instrument
Stated Rate	2.64%	2.64%
Discounted lease rentals | Maturity Year 2020 | Maximum
Debt instrument
Stated Rate	6.00%	6.90%
Discounted lease rentals | Maturity Year 2021
Debt instrument
Long-term borrowings	$ 8,733	$ 4,423
Discounted lease rentals | Maturity Year 2021 | Minimum
Debt instrument
Stated Rate	2.88%	2.88%
Discounted lease rentals | Maturity Year 2021 | Maximum
Debt instrument
Stated Rate	5.00%	4.57%
Discounted lease rentals | Maturity Year 2022
Debt instrument
Long-term borrowings	$ 1,756	$ 0
Stated Rate		0.00%
Discounted lease rentals | Maturity Year 2022 | Minimum
Debt instrument
Stated Rate	3.04%
Discounted lease rentals | Maturity Year 2022 | Maximum
Debt instrument
Stated Rate	5.24%
Other long-term borrowings | Maturity Year 2017
Debt instrument
Long-term borrowings	$ 0	$ 2,764
Stated Rate	0.00%	1.36%

Equity (Details)

Equity (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016	Sep. 14, 2017
Schedule of Preferred Stock
Preferred stock, value outstanding	$ 265,967		$ 265,967		$ 263,240
Preferred stock, par value (in dollars per share)	$ 0.01		$ 0.01		$ 0.01
Outstanding preferred stock reclassified to accrued expenses and other liabilities			$ 172,500
Deferred stock issuance costs originally recorded as a reduction to preferred stock upon issuance, reclassified to retained earnings	$ 5,779	$ 0	5,779	$ 0
Cash dividends paid on preferred stock			14,541	14,541
Preferred Stock, value, issued	265,967		265,967		$ 263,240
Series A Preferred Stock
Schedule of Preferred Stock
Preferred stock, value outstanding	$ 0		$ 0		$ 166,721
Annual rate of dividend (as a percent)			7.50%		7.50%
Preferred stock, depositary shares outstanding	6,900,000		6,900,000
Preferred stock, par value (in dollars per share)	$ 0.01		$ 0.01
Preferred stock, liquidation preference per share	25,000		25,000
Preferred stock, liquidation preference per depositary share	$ 25		$ 25
Outstanding preferred stock reclassified to accrued expenses and other liabilities	$ 172,500		$ 172,500
Deferred stock issuance costs originally recorded as a reduction to preferred stock upon issuance, reclassified to retained earnings	5,800		5,800
Cash dividends paid on preferred stock	3,200	3,200	9,700	9,700
Dividends accrued for the period from September 1, 2017 to October 15, 2017	1,600		1,600
Series B Preferred Stock
Schedule of Preferred Stock
Preferred stock, value outstanding	$ 96,519		$ 96,519		$ 96,519
Annual rate of dividend (as a percent)			6.45%		6.45%
Preferred stock, par value (in dollars per share)	$ 0.01		$ 0.01
Preferred stock, liquidation preference per share	$ 25		$ 25
Cash dividends paid on preferred stock	$ 1,600	$ 1,600	$ 4,800	$ 4,800
Preferred stock, shares outstanding	4,000,000		4,000,000
Series C Preferred Stock
Schedule of Preferred Stock
Preferred stock, value outstanding	$ 169,448		$ 169,448		$ 0
Annual rate of dividend (as a percent)			5.70%
Preferred stock, par value (in dollars per share)						$ 0.01
Preferred stock, liquidation preference per share						25,000
Preferred stock, liquidation preference per depositary share						$ 25
Preferred stock, depositary shares issued						7,000,000
Preferred Stock, value, issued						$ 175,000
Deferred stock issuance costs of Series C preferred stock						5,600
Net proceeds of the offering, after deducting stock issuance costs						$ 169,400

Regulatory Capital Requiremen67

Regulatory Capital Requirements (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Dec. 31, 2016
Compliance with Regulatory Capital Requirements under Banking Regulations
Number of prior calendar years considered for payment of dividends in excess of net retained profit	2 years
Net profits for the current year combined with retained net profits for preceding two calendar years	$ 462,700
Maximum
Compliance with Regulatory Capital Requirements under Banking Regulations
Percentage of net retained profits for the current year combined with retained net profits for the preceding two calendar years that can be declared as dividend	100.00%
TCF
Regulatory Capital:
Common equity Tier 1 capital	$ 2,080,729	$ 1,970,323
Tier 1 capital	2,362,926	2,248,221
Total capital	$ 2,734,260	$ 2,635,925
Common equity Tier 1 capital ratio
Actual, Ratio	10.05%	10.24%
Tier 1 risk-based capital ratio
Actual, Ratio	11.41%	11.68%
Total risk-based capital ratio
Actual, Ratio	13.21%	13.69%
Tier 1 leverage ratio
Actual, Ratio	10.88%	10.73%
TCF Bank
Compliance with Regulatory Capital Requirements under Banking Regulations
Capital conservation buffer excluded from minimum capital requirement	1.25%	0.625%
Regulatory Capital:
Common equity Tier 1 capital	$ 2,267,884	$ 2,144,966
Tier 1 capital	2,287,790	2,162,128
Total capital	$ 2,695,379	$ 2,583,512
Common equity Tier 1 capital ratio
Actual, Ratio	10.96%	11.14%
Well-Capitalized Capital Requirement, Ratio	6.50%
Minimum Capital Requirement, Ratio	4.50%
Tier 1 risk-based capital ratio
Actual, Ratio	11.05%	11.23%
Well-Capitalized Capital Requirement, Ratio	8.00%
Minimum Capital Requirement, Ratio	6.00%
Total risk-based capital ratio
Actual, Ratio	13.02%	13.42%
Well-Capitalized Capital Requirement, Ratio	10.00%
Minimum Capital Requirement, Ratio	8.00%
Tier 1 leverage ratio
Actual, Ratio	10.53%	10.32%
Well-Capitalized Capital Requirement, Ratio	5.00%
Minimum Capital Requirement, Ratio	4.00%

Stock Compensation (Details)

Stock Compensation (Details) - $ / shares	Sep. 30, 2017	Sep. 30, 2017	Dec. 31, 2016
Restricted Stock Awards (RSAs)
Restricted Stock Awards, Shares Activity
Outstanding at the beginning of the period (in shares)		3,536,175
Granted (in shares)		510,371
Forfeited/cancelled (in shares)		(485,670)
Vested (in shares)		(898,680)
Outstanding at the end of the period (in shares)	2,662,196	2,662,196	3,536,175
Restricted Stock Awards, Weighted-Average Grant Date Fair Value
Weighted-Average Grant Date Fair Value, Outstanding at the beginning (in dollars per share)		$ 12.81
Weighted-Average Grant Date Fair Value, Granted (in dollars per share)		16.19
Weighted-Average Grant Date Fair Value, Forfeited/cancelled (in dollars per share)		10.93
Weighted-Average Grant Date Fair Value, Vested (in dollars per share)		13.65
Weighted-Average Grant Date Fair Value, Outstanding at the end (in dollars per share)	$ 13.52	13.52	$ 12.81
Restricted Stock Awards (RSAs) | Minimum
Restricted Stock Awards, Grant Date Fair Value Range
Grant Date Fair Value, Outstanding at the beginning (in dollars per share)		7.73
Grant Date Fair Value, Granted (in dollars per share)		13.96
Grant Date Fair Value, Forfeited/canceled (in dollars per share)		7.73
Grant Date Fair Value, Vested (in dollars per share)		9.36
Grant Date Fair Value, Outstanding at the end (in dollars per share)	7.73	7.73	7.73
Restricted Stock Awards (RSAs) | Maximum
Restricted Stock Awards, Grant Date Fair Value Range
Grant Date Fair Value, Outstanding at the beginning (in dollars per share)		16.28
Grant Date Fair Value, Granted (in dollars per share)		18.58
Grant Date Fair Value, Forfeited/canceled (in dollars per share)		15.87
Grant Date Fair Value, Vested (in dollars per share)		16.02
Grant Date Fair Value, Outstanding at the end (in dollars per share)	$ 18.58	$ 18.58	$ 16.28
Restricted Stock Units (RSUs) | Omnibus Incentive Plan
Restricted Stock Awards, Shares Activity
Vested (in shares)	0
Stock Options
Stock options, shares activity
Outstanding at the beginning of the period (in shares)		404,000
Granted (in shares)		0
Exercised (in shares)		(38,000)
Forfeited/canceled (in shares)		0
Vested (in shares)		0
Outstanding at the end of the period (in shares)	366,000	366,000	404,000
Stock Options, Weighted-Average Remaining Contractual Life
Weighted- Average Remaining Contractual Life		3 months 22 days	1 year 22 days
Weighted-Average Exercise Price
Weighted-Average Exercise Price, Outstanding at the beginning (in dollars per share)		$ 15.75
Weighted-Average Exercise Price, Granted (in dollars per share)		0
Weighted-Average Exercise Price, Exercised (in dollars per share)		15.75
Weighted-Average Exercise Price, Forfeited/canceled (in dollars per share)		0
Weighted-Average Exercise Price, Vested (in dollars per share)		0
Weighted-Average Exercise Price, Outstanding at the end (in dollars per share)	$ 15.75	$ 15.75	$ 15.75
Stock options outstanding and exercisable
Stock Options Exercisable (in shares)	366,000	366,000
Stock Options Exercisable, Weighted-Average Exercise Price (in dollars per share)	$ 15.75	$ 15.75
Stock Options | Omnibus Incentive Plan
Stock options, shares activity
Granted (in shares)		0
Stock Options | Incentive Stock Program
Stock options, shares activity
Granted (in shares)		0

Stock Compensation (Details 2)

Stock Compensation (Details 2) - USD ($) $ in Millions	Sep. 30, 2017	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Restricted Stock Awards (RSAs)
Share-based compensation
Outstanding number of shares to vest only if certain return on asset goals, and service conditions are achieved (in shares)	350,000	350,000		350,000
Unrecognized stock compensation expense for restricted stock awards	$ 22.6	$ 22.6		$ 22.6
Weighted-average remaining amortization period				1 year 9 months 18 days
Restricted stock units vested (in shares)				898,680
Restricted Stock Awards and Restricted Stock Units
Share-based compensation
Compensation expense		$ 2.4	$ 2	$ 6.5	$ 6.8
Stock Options
Share-based compensation
Granted (in shares)				0
Omnibus Incentive Plan | Restricted Stock Units (RSUs)
Share-based compensation
Restricted stock units, grants in period (in shares)	360,988	360,988		360,988
Restricted stock, maximum multiplier				150.00%
Restricted stock units vested (in shares)	0
Remaining weighted-average performance period for RSUs				1 year 11 months 16 days
Omnibus Incentive Plan | Stock Options
Share-based compensation
Granted (in shares)				0
Incentive Stock Program | Stock Options
Share-based compensation
Granted (in shares)				0

Employee Benefit Plans (Details

Employee Benefit Plans (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Pension Plan
Net periodic benefit plan (income) cost included in compensation and employee benefits expense
Interest cost	$ 284,000	$ 321,000	$ 854,000	$ 961,000
(Gain) loss on plan assets	(142,000)	(147,000)	(426,000)	(440,000)
Net periodic benefit plan (income) cost	142,000	174,000	428,000	521,000
TCF contributions	0	0	0	0
Postretirement Plan
Net periodic benefit plan (income) cost included in compensation and employee benefits expense
Interest cost	33,000	37,000	100,000	113,000
Amortization of prior service cost	(12,000)	(12,000)	(35,000)	(35,000)
Net periodic benefit plan (income) cost	21,000	25,000	65,000	78,000
TCF contributions	$ 100,000	$ 100,000	$ 200,000	$ 300,000

Derivative Instruments (Details

Derivative Instruments (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Derivative assets
Gross Amounts Recognized	$ 11,476	$ 6,320
Gross Amounts Offset	(7,088)	(2,072)
Net Amount Presented	4,388	4,248
Derivative liabilities
Gross Amounts Recognized	1,075	4,365
Gross Amounts Offset	(475)	(3,716)
Net Amount Presented	600	649
Forward foreign exchange contracts | Designated as hedges
Derivative assets
Notional Amount	75,539	61,760
Gross Amounts Recognized	2,180	1,082
Gross Amounts Offset	(2,180)	0
Net Amount Presented	0	1,082
Forward foreign exchange contracts | Not designated as hedges
Derivative assets
Notional Amount	397,903	250,018
Gross Amounts Recognized	6,044	2,995
Gross Amounts Offset	(4,817)	(1,439)
Net Amount Presented	1,227	1,556
Derivative liabilities
Notional Amount		115,336
Gross Amounts Recognized		469
Gross Amounts Offset		(445)
Net Amount Presented		24
Interest rate contracts | Designated as hedges
Derivative liabilities
Notional Amount	150,000	150,000
Gross Amounts Recognized	75	1,320
Gross Amounts Offset	(75)	(1,320)
Net Amount Presented	0	0
Interest rate contracts | Not designated as hedges
Derivative assets
Notional Amount	445,711	149,499
Gross Amounts Recognized	2,763	1,925
Gross Amounts Offset	(91)	(633)
Net Amount Presented	2,672	1,292
Derivative liabilities
Notional Amount	92,799	149,499
Gross Amounts Recognized	613	1,936
Gross Amounts Offset	(16)	(1,332)
Net Amount Presented	597	604
Interest rate lock commitments | Not designated as hedges
Derivative assets
Notional Amount	33,763	27,954
Gross Amounts Recognized	489	318
Gross Amounts Offset	0	0
Net Amount Presented	489	318
Derivative liabilities
Notional Amount	313	2,947
Gross Amounts Recognized	3	21
Gross Amounts Offset	0	0
Net Amount Presented	3	21
Other contracts | Not designated as hedges
Derivative liabilities
Notional Amount	13,804	13,804
Gross Amounts Recognized	384	619
Gross Amounts Offset	(384)	(619)
Net Amount Presented	$ 0	$ 0

Derivative Instruments (Detai72

Derivative Instruments (Details 2) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Derivative instruments, gain (loss)
Net gain (loss) recognized	$ (10,863,000)	$ 5,841,000	$ (20,185,000)	$ (22,460,000)
Net investment hedges:
Net unrealized gain (loss)	(2,714,000)	904,000	(5,073,000)	(2,691,000)
Other comprehensive income (loss) | Designated as hedges | Net investment hedges
Net investment hedges:
Net unrealized gain (loss)	(2,714,000)	904,000	(5,073,000)	(2,691,000)
Non-interest income | Designated as hedges | Fair value hedging
Derivative instruments, gain (loss)
Net gain (loss) recognized on non-derivative hedged items	146,000	1,333,000	(601,000)	(7,868,000)
Interest rate contracts
Derivative, Collateral
Cash collateral posted	7,500,000		7,500,000
Interest rate contracts | Non-interest income | Designated as hedges | Fair value hedging
Derivative instruments, gain (loss)
Net gain (loss) recognized	(135,000)	(1,407,000)	813,000	9,132,000
Interest rate contracts | Non-interest income | Not designated as hedges
Derivative instruments, gain (loss)
Net gain (loss) recognized	(155,000)	27,000	(263,000)	(92,000)
Forward foreign exchange contracts
Credit risk-related contingent features
Forward foreign exchange contracts with credit risk-related contingent features, notional value	56,100,000		56,100,000
Additional collateral required, if TCF was rated less than BB- by Standard and Poor's	1,100,000		1,100,000
Forward foreign exchange contracts with credit risk-related contingent features, net liability amount	0		0
Derivative, Collateral
Cash collateral received	7,000,000		7,000,000
Forward foreign exchange contracts | Non-interest expense | Not designated as hedges
Derivative instruments, gain (loss)
Net gain (loss) recognized	(10,690,000)	5,979,000	(20,323,000)	(23,459,000)
Interest rate lock commitments | Non-interest income | Not designated as hedges
Derivative instruments, gain (loss)
Net gain (loss) recognized	(29,000)	(91,000)	189,000	146,000
Other contracts
Derivative, Collateral
Cash collateral posted	1,400,000		1,400,000
Other contracts | Non-interest expense | Not designated as hedges
Derivative instruments, gain (loss)
Net gain (loss) recognized	$ 0	$ 0	$ 0	$ (319,000)

Fair Values Disclosures (Detail

Fair Values Disclosures (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Fair Value, Assets and liabilities measured at fair value on Recurring and Nonrecurring basis
Other real estate owned	$ 26.4		$ 26.4		$ 46.8
Repossessed and returned assets at carrying value	11.4		11.4		$ 10
Measurement of fair value on a non-recurring basis
Fair Value, Assets and liabilities measured at fair value on Recurring and Nonrecurring basis
OREO and repossessed assets, amount written down	1.6	$ 2	5	$ 7
Subordinated bank notes | Maturity Year 2025
Fair Value, Assets and liabilities measured at fair value on Recurring and Nonrecurring basis
Fixed-rate subordinated notes, Face amount	$ 150		$ 150

Fair Values Disclosures (Deta74

Fair Values Disclosures (Details 2) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Fair Value, Assets and liabilities measured at fair value on Recurring and Nonrecurring basis
Securities held to maturity	$ 165,315	$ 181,314
U.S. Government sponsored enterprises and federal agencies
Fair Value, Assets and liabilities measured at fair value on Recurring and Nonrecurring basis
Securities held to maturity	162,515	178,514
Measurement of fair value on a recurring basis
Fair Value, Assets and liabilities measured at fair value on Recurring and Nonrecurring basis
Assets, Fair value carrying amount	1,664,866	1,500,142
Liabilities, Fair value carrying amount	28,365	27,741
Measurement of fair value on a recurring basis | Loans held for sale
Fair Value, Assets and liabilities measured at fair value on Recurring and Nonrecurring basis
Assets, Fair value carrying amount	4,193	6,498
Measurement of fair value on a recurring basis | Interest-only strip
Fair Value, Assets and liabilities measured at fair value on Recurring and Nonrecurring basis
Assets, Fair value carrying amount	23,797	40,152
Measurement of fair value on a recurring basis | Forward foreign exchange contracts
Fair Value, Assets and liabilities measured at fair value on Recurring and Nonrecurring basis
Assets, Fair value carrying amount	8,224	4,077
Liabilities, Fair value carrying amount		469
Measurement of fair value on a recurring basis | Interest rate contracts
Fair Value, Assets and liabilities measured at fair value on Recurring and Nonrecurring basis
Assets, Fair value carrying amount	2,763	1,925
Liabilities, Fair value carrying amount	688	3,256
Measurement of fair value on a recurring basis | Interest rate lock commitments
Fair Value, Assets and liabilities measured at fair value on Recurring and Nonrecurring basis
Assets, Fair value carrying amount	489	318
Liabilities, Fair value carrying amount	3	21
Measurement of fair value on a recurring basis | Forward loan sales commitments
Fair Value, Assets and liabilities measured at fair value on Recurring and Nonrecurring basis
Assets, Fair value carrying amount	20	374
Liabilities, Fair value carrying amount	73	13
Measurement of fair value on a recurring basis | Assets held in trust for deferred compensation plans
Fair Value, Assets and liabilities measured at fair value on Recurring and Nonrecurring basis
Assets, Fair value carrying amount	27,217	23,363
Measurement of fair value on a recurring basis | Liabilities held in trust for deferred compensation plans
Fair Value, Assets and liabilities measured at fair value on Recurring and Nonrecurring basis
Liabilities, Fair value carrying amount	27,217	23,363
Measurement of fair value on a recurring basis | Other contracts
Fair Value, Assets and liabilities measured at fair value on Recurring and Nonrecurring basis
Liabilities, Fair value carrying amount	384	619
Measurement of fair value on a recurring basis | U.S. Government sponsored enterprises and federal agencies
Fair Value, Assets and liabilities measured at fair value on Recurring and Nonrecurring basis
Assets, Fair value carrying amount	830,621	810,891
Measurement of fair value on a recurring basis | Mortgage-backed securities, Other
Fair Value, Assets and liabilities measured at fair value on Recurring and Nonrecurring basis
Assets, Fair value carrying amount	8	18
Measurement of fair value on a recurring basis | Obligations of states and political subdivisions
Fair Value, Assets and liabilities measured at fair value on Recurring and Nonrecurring basis
Assets, Fair value carrying amount	767,534	612,526
Measurement of fair value on a non-recurring basis
Fair Value, Assets and liabilities measured at fair value on Recurring and Nonrecurring basis
Assets, Fair value carrying amount	100,243	151,546
Loans	74,097	113,954
Repossessed and returned assets	6,992	5,567
Securities held to maturity		2,400
Measurement of fair value on a non-recurring basis | Consumer
Fair Value, Assets and liabilities measured at fair value on Recurring and Nonrecurring basis
Other real estate owned	15,703	25,751
Measurement of fair value on a non-recurring basis | Commercial
Fair Value, Assets and liabilities measured at fair value on Recurring and Nonrecurring basis
Other real estate owned	3,451	3,874
Level 1 | Measurement of fair value on a recurring basis
Fair Value, Assets and liabilities measured at fair value on Recurring and Nonrecurring basis
Assets, Fair value carrying amount	27,217	23,363
Liabilities, Fair value carrying amount	27,217	23,363
Level 1 | Measurement of fair value on a recurring basis | Loans held for sale
Fair Value, Assets and liabilities measured at fair value on Recurring and Nonrecurring basis
Assets, Fair value carrying amount	0	0
Level 1 | Measurement of fair value on a recurring basis | Interest-only strip
Fair Value, Assets and liabilities measured at fair value on Recurring and Nonrecurring basis
Assets, Fair value carrying amount	0	0
Level 1 | Measurement of fair value on a recurring basis | Forward foreign exchange contracts
Fair Value, Assets and liabilities measured at fair value on Recurring and Nonrecurring basis
Assets, Fair value carrying amount	0	0
Liabilities, Fair value carrying amount		0
Level 1 | Measurement of fair value on a recurring basis | Interest rate contracts
Fair Value, Assets and liabilities measured at fair value on Recurring and Nonrecurring basis
Assets, Fair value carrying amount	0	0
Liabilities, Fair value carrying amount	0	0
Level 1 | Measurement of fair value on a recurring basis | Interest rate lock commitments
Fair Value, Assets and liabilities measured at fair value on Recurring and Nonrecurring basis
Assets, Fair value carrying amount	0	0
Liabilities, Fair value carrying amount	0	0
Level 1 | Measurement of fair value on a recurring basis | Forward loan sales commitments
Fair Value, Assets and liabilities measured at fair value on Recurring and Nonrecurring basis
Assets, Fair value carrying amount	0	0
Liabilities, Fair value carrying amount	0	0
Level 1 | Measurement of fair value on a recurring basis | Assets held in trust for deferred compensation plans
Fair Value, Assets and liabilities measured at fair value on Recurring and Nonrecurring basis
Assets, Fair value carrying amount	27,217	23,363
Level 1 | Measurement of fair value on a recurring basis | Liabilities held in trust for deferred compensation plans
Fair Value, Assets and liabilities measured at fair value on Recurring and Nonrecurring basis
Liabilities, Fair value carrying amount	27,217	23,363
Level 1 | Measurement of fair value on a recurring basis | Other contracts
Fair Value, Assets and liabilities measured at fair value on Recurring and Nonrecurring basis
Liabilities, Fair value carrying amount	0	0
Level 1 | Measurement of fair value on a recurring basis | U.S. Government sponsored enterprises and federal agencies
Fair Value, Assets and liabilities measured at fair value on Recurring and Nonrecurring basis
Assets, Fair value carrying amount	0	0
Level 1 | Measurement of fair value on a recurring basis | Mortgage-backed securities, Other
Fair Value, Assets and liabilities measured at fair value on Recurring and Nonrecurring basis
Assets, Fair value carrying amount	0	0
Level 1 | Measurement of fair value on a recurring basis | Obligations of states and political subdivisions
Fair Value, Assets and liabilities measured at fair value on Recurring and Nonrecurring basis
Assets, Fair value carrying amount	0	0
Level 1 | Measurement of fair value on a non-recurring basis
Fair Value, Assets and liabilities measured at fair value on Recurring and Nonrecurring basis
Assets, Fair value carrying amount	0	0
Loans	0	0
Repossessed and returned assets	0	0
Securities held to maturity		0
Level 1 | Measurement of fair value on a non-recurring basis | Consumer
Fair Value, Assets and liabilities measured at fair value on Recurring and Nonrecurring basis
Other real estate owned	0	0
Level 1 | Measurement of fair value on a non-recurring basis | Commercial
Fair Value, Assets and liabilities measured at fair value on Recurring and Nonrecurring basis
Other real estate owned	0	0
Level 2 | Measurement of fair value on a recurring basis
Fair Value, Assets and liabilities measured at fair value on Recurring and Nonrecurring basis
Assets, Fair value carrying amount	1,609,142	1,429,419
Liabilities, Fair value carrying amount	688	3,725
Level 2 | Measurement of fair value on a recurring basis | Loans held for sale
Fair Value, Assets and liabilities measured at fair value on Recurring and Nonrecurring basis
Assets, Fair value carrying amount	0	0
Level 2 | Measurement of fair value on a recurring basis | Interest-only strip
Fair Value, Assets and liabilities measured at fair value on Recurring and Nonrecurring basis
Assets, Fair value carrying amount	0	0
Level 2 | Measurement of fair value on a recurring basis | Forward foreign exchange contracts
Fair Value, Assets and liabilities measured at fair value on Recurring and Nonrecurring basis
Assets, Fair value carrying amount	8,224	4,077
Liabilities, Fair value carrying amount		469
Level 2 | Measurement of fair value on a recurring basis | Interest rate contracts
Fair Value, Assets and liabilities measured at fair value on Recurring and Nonrecurring basis
Assets, Fair value carrying amount	2,763	1,925
Liabilities, Fair value carrying amount	688	3,256
Level 2 | Measurement of fair value on a recurring basis | Interest rate lock commitments
Fair Value, Assets and liabilities measured at fair value on Recurring and Nonrecurring basis
Assets, Fair value carrying amount	0	0
Liabilities, Fair value carrying amount	0	0
Level 2 | Measurement of fair value on a recurring basis | Forward loan sales commitments
Fair Value, Assets and liabilities measured at fair value on Recurring and Nonrecurring basis
Assets, Fair value carrying amount	0	0
Liabilities, Fair value carrying amount	0	0
Level 2 | Measurement of fair value on a recurring basis | Assets held in trust for deferred compensation plans
Fair Value, Assets and liabilities measured at fair value on Recurring and Nonrecurring basis
Assets, Fair value carrying amount	0	0
Level 2 | Measurement of fair value on a recurring basis | Liabilities held in trust for deferred compensation plans
Fair Value, Assets and liabilities measured at fair value on Recurring and Nonrecurring basis
Liabilities, Fair value carrying amount	0	0
Level 2 | Measurement of fair value on a recurring basis | Other contracts
Fair Value, Assets and liabilities measured at fair value on Recurring and Nonrecurring basis
Liabilities, Fair value carrying amount	0	0
Level 2 | Measurement of fair value on a recurring basis | U.S. Government sponsored enterprises and federal agencies
Fair Value, Assets and liabilities measured at fair value on Recurring and Nonrecurring basis
Assets, Fair value carrying amount	830,621	810,891
Level 2 | Measurement of fair value on a recurring basis | Mortgage-backed securities, Other
Fair Value, Assets and liabilities measured at fair value on Recurring and Nonrecurring basis
Assets, Fair value carrying amount	0	0
Level 2 | Measurement of fair value on a recurring basis | Obligations of states and political subdivisions
Fair Value, Assets and liabilities measured at fair value on Recurring and Nonrecurring basis
Assets, Fair value carrying amount	767,534	612,526
Level 2 | Measurement of fair value on a non-recurring basis
Fair Value, Assets and liabilities measured at fair value on Recurring and Nonrecurring basis
Assets, Fair value carrying amount	3,734	2,767
Loans	0	0
Repossessed and returned assets	3,734	2,767
Securities held to maturity		0
Level 2 | Measurement of fair value on a non-recurring basis | Consumer
Fair Value, Assets and liabilities measured at fair value on Recurring and Nonrecurring basis
Other real estate owned	0	0
Level 2 | Measurement of fair value on a non-recurring basis | Commercial
Fair Value, Assets and liabilities measured at fair value on Recurring and Nonrecurring basis
Other real estate owned	0	0
Level 3 | Measurement of fair value on a recurring basis
Fair Value, Assets and liabilities measured at fair value on Recurring and Nonrecurring basis
Assets, Fair value carrying amount	28,507	47,360
Liabilities, Fair value carrying amount	460	653
Level 3 | Measurement of fair value on a recurring basis | Loans held for sale
Fair Value, Assets and liabilities measured at fair value on Recurring and Nonrecurring basis
Assets, Fair value carrying amount	4,193	6,498
Level 3 | Measurement of fair value on a recurring basis | Interest-only strip
Fair Value, Assets and liabilities measured at fair value on Recurring and Nonrecurring basis
Assets, Fair value carrying amount	23,797	40,152
Level 3 | Measurement of fair value on a recurring basis | Forward foreign exchange contracts
Fair Value, Assets and liabilities measured at fair value on Recurring and Nonrecurring basis
Assets, Fair value carrying amount	0	0
Liabilities, Fair value carrying amount		0
Level 3 | Measurement of fair value on a recurring basis | Interest rate contracts
Fair Value, Assets and liabilities measured at fair value on Recurring and Nonrecurring basis
Assets, Fair value carrying amount	0	0
Liabilities, Fair value carrying amount	0	0
Level 3 | Measurement of fair value on a recurring basis | Interest rate lock commitments
Fair Value, Assets and liabilities measured at fair value on Recurring and Nonrecurring basis
Assets, Fair value carrying amount	489	318
Liabilities, Fair value carrying amount	3	21
Level 3 | Measurement of fair value on a recurring basis | Forward loan sales commitments
Fair Value, Assets and liabilities measured at fair value on Recurring and Nonrecurring basis
Assets, Fair value carrying amount	20	374
Liabilities, Fair value carrying amount	73	13
Level 3 | Measurement of fair value on a recurring basis | Assets held in trust for deferred compensation plans
Fair Value, Assets and liabilities measured at fair value on Recurring and Nonrecurring basis
Assets, Fair value carrying amount	0	0
Level 3 | Measurement of fair value on a recurring basis | Liabilities held in trust for deferred compensation plans
Fair Value, Assets and liabilities measured at fair value on Recurring and Nonrecurring basis
Liabilities, Fair value carrying amount	0	0
Level 3 | Measurement of fair value on a recurring basis | Other contracts
Fair Value, Assets and liabilities measured at fair value on Recurring and Nonrecurring basis
Liabilities, Fair value carrying amount	384	619
Level 3 | Measurement of fair value on a recurring basis | U.S. Government sponsored enterprises and federal agencies
Fair Value, Assets and liabilities measured at fair value on Recurring and Nonrecurring basis
Assets, Fair value carrying amount	0	0
Level 3 | Measurement of fair value on a recurring basis | Mortgage-backed securities, Other
Fair Value, Assets and liabilities measured at fair value on Recurring and Nonrecurring basis
Assets, Fair value carrying amount	8	18
Level 3 | Measurement of fair value on a recurring basis | Obligations of states and political subdivisions
Fair Value, Assets and liabilities measured at fair value on Recurring and Nonrecurring basis
Assets, Fair value carrying amount	0	0
Level 3 | Measurement of fair value on a non-recurring basis
Fair Value, Assets and liabilities measured at fair value on Recurring and Nonrecurring basis
Assets, Fair value carrying amount	96,509	148,779
Loans	74,097	113,954
Repossessed and returned assets	3,258	2,800
Securities held to maturity		2,400
Level 3 | Measurement of fair value on a non-recurring basis | Consumer
Fair Value, Assets and liabilities measured at fair value on Recurring and Nonrecurring basis
Other real estate owned	15,703	25,751
Level 3 | Measurement of fair value on a non-recurring basis | Commercial
Fair Value, Assets and liabilities measured at fair value on Recurring and Nonrecurring basis
Other real estate owned	$ 3,451	$ 3,874

Fair Values Disclosures (Deta75

Fair Values Disclosures (Details 3) - Level 3 - Measurement of fair value on a recurring basis - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Interest Rate Lock Commitments
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Beginning balance	$ 515	$ 953	$ 297	$ 716
Total net gains (losses) included in net income	(29)	(91)	189	146
Total net gains (losses) include in other comprehensive income (loss)	0	0	0	0
Sales	0	0	0	0
Originations	0	0	0	0
Principal paydowns / settlements	0	0	0	0
Ending balance	486	862	486	862
Forward Loan Sales Commitments
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Beginning balance	(67)	(317)	361	265
Total net gains (losses) included in net income	14	121	(414)	(461)
Total net gains (losses) include in other comprehensive income (loss)	0	0	0	0
Sales	0	0	0	0
Originations	0	0	0	0
Principal paydowns / settlements	0	0	0	0
Ending balance	(53)	(196)	(53)	(196)
Other Contracts
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Beginning balance	(462)	(466)	(619)	(305)
Total net gains (losses) included in net income	0	0	0	(318)
Total net gains (losses) include in other comprehensive income (loss)	0	0	0	0
Sales	0	0	0	0
Originations	0	0	0	0
Principal paydowns / settlements	78	79	235	236
Ending balance	(384)	(387)	(384)	(387)
Securities Available for Sale
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	11	25	18	34
Total net gains (losses) included in net income	0	0	0	0
Total net gains (losses) included in other comprehensive income (loss)	0	0	0	0
Sales	0	0	0	0
Originations	0	0	0	0
Principal paydowns / settlements	(3)	(3)	(10)	(12)
Ending balance	8	22	8	22
Loans Held for Sale
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	5,238	7,565	6,498	10,568
Total net gains (losses) included in net income	17	(72)	155	126
Total net gains (losses) included in other comprehensive income (loss)	0	0	0	0
Sales	(59,308)	(95,901)	(151,182)	(257,641)
Originations	58,634	94,739	149,118	253,278
Principal paydowns / settlements	(388)	0	(396)	0
Ending balance	4,193	6,331	4,193	6,331
Interest-only Strips
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	32,582	48,411	40,152	44,332
Total net gains (losses) included in net income	1,110	(819)	3,323	1,697
Total net gains (losses) included in other comprehensive income (loss)	(1,063)	784	(464)	784
Sales	0	0	0	0
Originations	542	2,513	2,458	19,121
Principal paydowns / settlements	(9,374)	(7,744)	(21,672)	(22,789)
Ending balance	$ 23,797	$ 43,145	$ 23,797	$ 43,145

Fair Values Disclosures (Deta76

Fair Values Disclosures (Details 4) - Loans Held for Sale - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Fair Value, Option, Quantitative Disclosures [Line Items]
Fair value carrying amount	$ 4,193		$ 4,193		$ 6,498
Aggregate unpaid principal amount	4,082		4,082		6,563
Fair value carrying amount less aggregate unpaid principal	111		111		$ (65)
Gains on sales of consumer real estate loans, net
Fair Value, Option, Quantitative Disclosures [Line Items]
Net gain from initial measurement of the correspondent lending loans held for sale and subsequent changes in fair value for loans outstanding	$ 1,300	$ 2,100	$ 3,500	$ 5,900

Fair Values Disclosures (Deta77

Fair Values Disclosures (Details 5) - USD ($) $ in Thousands	Sep. 30, 2017	Jun. 30, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Dec. 31, 2015
Financial instrument assets:
Securities held to maturity	$ 165,315		$ 181,314
Loans:
Consumer real estate	4,930,812		5,084,352
Inventory finance	2,576,077		2,470,175
Auto finance	3,240,413		2,647,741
Other	20,439		18,771
Allowance for loan losses	(168,244)	$ (165,620)	(160,269)	$ (155,841)	$ (158,572)	$ (156,054)
Carrying Amount
Financial instrument assets:
Investments	87,690		74,714
Securities held to maturity	165,315		181,314
Loans held for sale	253,958		268,832
Loans:
Consumer real estate	4,930,812		5,084,352
Commercial real estate	2,711,668		2,634,191
Commercial business	778,012		652,287
Equipment finance	2,263,723		2,016,732
Inventory finance	2,576,077		2,470,175
Auto finance	3,240,413		2,647,741
Other	20,439		18,771
Allowance for loan losses	(168,244)		(160,269)
Securitization receivable	19,117		18,835
Total financial instrument assets	16,878,980		15,907,675
Financial instrument liabilities:
Deposits	18,107,486		17,242,522
Long-term borrowings	1,382,588		1,073,181
Total financial instrument liabilities	19,490,074		18,315,703
Financial instruments with off-balance sheet risk:
Commitments to extend credit	20,353		21,681
Standby letters of credit	(59)		(29)
Total financial instruments with off-balance sheet risk	20,294		21,652
Estimated Fair Value
Financial instrument assets:
Investments	87,690		74,714
Securities held to maturity	170,102		183,946
Loans held for sale	261,023		282,786
Loans:
Consumer real estate	5,042,688		5,165,062
Commercial real estate	2,672,585		2,583,775
Commercial business	755,703		631,215
Equipment finance	2,234,458		1,983,237
Inventory finance	2,560,652		2,453,184
Auto finance	3,233,835		2,656,266
Other	20,104		17,780
Allowance for loan losses	0		0
Securitization receivable	18,489		18,835
Total financial instrument assets	17,057,329		16,050,800
Financial instrument liabilities:
Deposits	18,139,670		17,262,784
Long-term borrowings	1,390,859		1,076,639
Total financial instrument liabilities	19,530,529		18,339,423
Financial instruments with off-balance sheet risk:
Commitments to extend credit	20,353		21,681
Standby letters of credit	(59)		(29)
Total financial instruments with off-balance sheet risk	20,294		21,652
Estimated Fair Value | Level 1
Financial instrument assets:
Investments	0		0
Securities held to maturity	0		0
Loans held for sale	0		0
Loans:
Consumer real estate	0		0
Commercial real estate	0		0
Commercial business	0		0
Equipment finance	0		0
Inventory finance	0		0
Auto finance	0		0
Other	0		0
Allowance for loan losses	0		0
Securitization receivable	0		0
Total financial instrument assets	0		0
Financial instrument liabilities:
Deposits	13,135,428		13,150,099
Long-term borrowings	0		0
Total financial instrument liabilities	13,135,428		13,150,099
Financial instruments with off-balance sheet risk:
Commitments to extend credit	0		0
Standby letters of credit	0		0
Total financial instruments with off-balance sheet risk	0		0
Estimated Fair Value | Level 2
Financial instrument assets:
Investments	87,690		74,714
Securities held to maturity	167,302		181,146
Loans held for sale	0		0
Loans:
Consumer real estate	0		0
Commercial real estate	0		0
Commercial business	0		0
Equipment finance	0		0
Inventory finance	0		0
Auto finance	0		0
Other	0		0
Allowance for loan losses	0		0
Securitization receivable	0		0
Total financial instrument assets	254,992		255,860
Financial instrument liabilities:
Deposits	5,004,242		4,112,685
Long-term borrowings	1,390,859		1,073,875
Total financial instrument liabilities	6,395,101		5,186,560
Financial instruments with off-balance sheet risk:
Commitments to extend credit	20,353		21,681
Standby letters of credit	(59)		(29)
Total financial instruments with off-balance sheet risk	20,294		21,652
Estimated Fair Value | Level 3
Financial instrument assets:
Investments	0		0
Securities held to maturity	2,800		2,800
Loans held for sale	261,023		282,786
Loans:
Consumer real estate	5,042,688		5,165,062
Commercial real estate	2,672,585		2,583,775
Commercial business	755,703		631,215
Equipment finance	2,234,458		1,983,237
Inventory finance	2,560,652		2,453,184
Auto finance	3,233,835		2,656,266
Other	20,104		17,780
Allowance for loan losses	0		0
Securitization receivable	18,489		18,835
Total financial instrument assets	16,802,337		15,794,940
Financial instrument liabilities:
Deposits	0		0
Long-term borrowings	0		2,764
Total financial instrument liabilities	0		2,764
Financial instruments with off-balance sheet risk:
Commitments to extend credit	0		0
Standby letters of credit	0		0
Total financial instruments with off-balance sheet risk	$ 0		$ 0

Earnings Per Common Share (Deta

Earnings Per Common Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Basic Earnings Per Common Share:
Net income attributable to TCF Financial Corporation	$ 60,528	$ 56,292	$ 167,238	$ 162,032
Preferred Stock Dividends	6,464	4,847	16,158	14,541
Impact of notice to redeem preferred stock	5,779	0	5,779	0
Net income available to common stockholders	48,285	51,445	145,301	147,491
Earnings allocated to participating securities	8	13	25	38
Earnings allocated to common stock	$ 48,277	$ 51,432	$ 145,276	$ 147,453
Weighted-average common shares outstanding for basic earnings per common share (in shares)	168,970,543	167,366,069	168,492,877	167,155,393
Basic earnings per common share (in dollars per share)	$ 0.29	$ 0.31	$ 0.86	$ 0.88
Diluted Earnings Per Common Share:
Earnings allocated to common stock	$ 48,277	$ 51,432	$ 145,276	$ 147,453
Weighted-average common shares outstanding used in basic earnings per common share calculation (in shares)	168,970,543	167,366,069	168,492,877	167,155,393
Net dilutive effect of:
Non-participating restricted stock (in shares)	269,394	516,083	312,297	478,641
Stock options (in shares)	314	85,467	17,654	73,866
Weighted-average common shares outstanding for diluted earnings per common share (in shares)	169,240,251	167,967,619	168,822,828	167,707,900
Diluted earnings per common share (in dollars per share)	$ 0.29	$ 0.31	$ 0.86	$ 0.88

Earnings Per Common Share (De79

Earnings Per Common Share (Details 2) - shares shares in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Earnings Per Share [Abstract]
Antidilutive securities excluded from computation of earnings per share (in shares)	4	5.1	4.1	5.1

Other Non-interest Expense (Det

Other Non-interest Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Other Income and Expenses [Abstract]
Professional fees	$ 9,875	$ 3,993	$ 26,295	$ 13,170
Advertising and marketing	6,060	5,488	19,678	17,053
Loan and lease processing	5,304	7,035	17,258	19,526
Outside processing	5,176	3,728	14,411	10,941
Card processing and issuance costs	4,719	3,952	13,534	11,634
FDIC insurance	4,181	4,082	11,964	11,946
Other	26,093	31,143	83,380	87,915
Total other non-interest expense	$ 61,408	$ 59,421	$ 186,520	$ 172,185

Business Segments (Details)

Business Segments (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Segment Reporting Information
Net interest income	$ 234,103	$ 212,018	$ 683,378	$ 636,660
Provision for credit losses	14,545	13,894	46,184	45,986
Non-interest income	109,230	119,674	327,407	350,232
Non-interest expense	235,035	228,878	712,128	684,528
Income tax expense (benefit)	30,704	30,257	77,341	86,766
Income after income tax expense	63,049	58,663	175,132	169,612
Income attributable to non-controlling interest	2,521	2,371	7,894	7,580
Preferred stock dividends	6,464	4,847	16,158	14,541
Impact of notice to redeem preferred stock	5,779	0	5,779	0
Net income available to common stockholders	48,285	51,445	145,301	147,491
Total assets	23,005,038	21,084,156	23,005,038	21,084,156	$ 21,441,326
Revenues from external customers:
Interest income	257,605	232,726	748,429	699,072
Non-interest income	109,230	119,674	327,407	350,232
Total	366,835	352,400	1,075,836	1,049,304
Operating segments | Consumer Banking
Segment Reporting Information
Net interest income	145,361	140,887	428,782	420,886
Provision for credit losses	11,129	10,720	33,211	36,278
Non-interest income	70,934	89,373	215,154	254,130
Non-interest expense	164,062	165,668	494,449	491,632
Income tax expense (benefit)	14,370	19,367	41,133	52,824
Income after income tax expense	26,734	34,505	75,143	94,282
Income attributable to non-controlling interest	0	0	0	0
Preferred stock dividends	0	0	0	0
Impact of notice to redeem preferred stock	0		0
Net income available to common stockholders	26,734	34,505	75,143	94,282
Total assets	9,025,172	8,759,858	9,025,172	8,759,858
Revenues from external customers:
Interest income	116,296	111,107	337,343	336,176
Non-interest income	70,934	89,373	215,154	254,130
Total	187,230	200,480	552,497	590,306
Operating segments | Wholesale Banking
Segment Reporting Information
Net interest income	88,941	85,721	264,749	257,917
Provision for credit losses	3,416	3,174	12,973	9,708
Non-interest income	38,272	30,393	111,930	94,794
Non-interest expense	70,184	61,382	202,687	184,217
Income tax expense (benefit)	17,153	17,355	52,760	52,866
Income after income tax expense	36,460	34,203	108,259	105,920
Income attributable to non-controlling interest	2,521	2,371	7,894	7,580
Preferred stock dividends	0	0	0	0
Impact of notice to redeem preferred stock	0		0
Net income available to common stockholders	33,939	31,832	100,365	98,340
Total assets	11,274,153	9,902,952	11,274,153	9,902,952
Revenues from external customers:
Interest income	130,618	112,834	380,210	338,461
Non-interest income	38,272	30,393	111,930	94,794
Total	168,890	143,227	492,140	433,255
Operating segments | Enterprise Services
Segment Reporting Information
Net interest income	(199)	(14,590)	(10,153)	(42,143)
Provision for credit losses	0	0	0	0
Non-interest income	24	(92)	323	1,308
Non-interest expense	789	1,828	14,992	8,679
Income tax expense (benefit)	(819)	(6,465)	(16,552)	(18,924)
Income after income tax expense	(145)	(10,045)	(8,270)	(30,590)
Income attributable to non-controlling interest	0	0	0	0
Preferred stock dividends	6,464	4,847	16,158	14,541
Impact of notice to redeem preferred stock	5,779		5,779
Net income available to common stockholders	(12,388)	(14,892)	(30,207)	(45,131)
Total assets	2,705,713	2,421,346	2,705,713	2,421,346
Revenues from external customers:
Interest income	10,691	8,785	30,876	24,435
Non-interest income	24	(92)	323	1,308
Total	$ 10,715	$ 8,693	$ 31,199	$ 25,743

Accumulated Other Comprehensi82

Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016	Dec. 31, 2014
Accumulated Other Comprehensive Income (Loss)
Total other comprehensive income (loss), before tax	$ 4,159	$ (7,264)	$ 28,743	$ 34,152
Total other comprehensive income (loss), tax	(465)	2,396	(8,827)	(11,911)
Unrealized gains (losses) arising during the period, net of tax	4,339	(5,124)	20,086	21,365
Reclassification of net (gains) losses from accumulated other comprehensive income (loss), net of tax	(645)	256	(170)	876
Total other comprehensive income (loss), net of tax	3,694	(4,868)	19,916	22,241
Available for sale securities transferred to held to maturity securities value						$ 191,700
Unrealized holding gain (loss) on transfers from available for sale to held to maturity retained in accumulated other comprehensive income	12,300		12,300		$ 13,000
Net unrealized gains (losses) on securities available for sale and interest-only strips:
Accumulated Other Comprehensive Income (Loss)
Unrealized gains (losses) arising during the period, before tax	4,974	(7,624)	28,562	32,639
Reclassification of net (gains) losses from accumulated other comprehensive income (loss), before tax	(1,028)	425	(238)	1,448
Total other comprehensive income (loss), before tax	3,946	(7,199)	28,324	34,087
Unrealized gains (losses) arising during the period, tax	(1,892)	2,896	(10,859)	(12,396)
Reclassification of net (gains) losses from accumulated other comprehensive income (loss), tax	391	(161)	90	(550)
Total other comprehensive income (loss), tax	(1,501)	2,735	(10,769)	(12,946)
Unrealized gains (losses) arising during the period, net of tax	3,082	(4,728)	17,703	20,243
Reclassification of net (gains) losses from accumulated other comprehensive income (loss), net of tax	(637)	264	(148)	898
Total other comprehensive income (loss), net of tax	2,445	(4,464)	17,555	21,141
Net unrealized gains (losses) on net investment hedges
Accumulated Other Comprehensive Income (Loss)
Unrealized gains (losses) arising during the period, before tax	(2,714)	904	(5,073)	(2,691)
Unrealized gains (losses) arising during the period, tax	1,032	(343)	1,929	1,022
Unrealized gains (losses) arising during the period, net of tax	(1,682)	561	(3,144)	(1,669)
Reclassification of net (gains) losses from accumulated other comprehensive income (loss), net of tax	0	0	0	0
Total other comprehensive income (loss), net of tax	(1,682)	561	(3,144)	(1,669)
Foreign currency translation adjustment
Accumulated Other Comprehensive Income (Loss)
Unrealized gains (losses) arising during the period, before tax	2,939	(957)	5,527	2,791
Unrealized gains (losses) arising during the period, tax	0	0	0	0
Unrealized gains (losses) arising during the period, net of tax	2,939	(957)	5,527	2,791
Reclassification of net (gains) losses from accumulated other comprehensive income (loss), net of tax	0	0	0	0
Total other comprehensive income (loss), net of tax	2,939	(957)	5,527	2,791
Recognized postretirement prior service cost:
Accumulated Other Comprehensive Income (Loss)
Reclassification of net (gains) losses from accumulated other comprehensive income (loss), before tax	(12)	(12)	(35)	(35)
Reclassification of net (gains) losses from accumulated other comprehensive income (loss), tax	4	4	13	13
Unrealized gains (losses) arising during the period, net of tax	0	0	0	0
Reclassification of net (gains) losses from accumulated other comprehensive income (loss), net of tax	(8)	(8)	(22)	(22)
Total other comprehensive income (loss), net of tax	$ (8)	$ (8)	$ (22)	$ (22)

Accumulated Other Comprehensi83

Accumulated Other Comprehensive Income (Loss) (Details 2) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Changes in accumulated other comprehensive income by component
Balance, beginning of period	$ (17,503)	$ 11,763	$ (33,725)	$ (15,346)
Other comprehensive income (loss)	4,339	(5,124)	20,086	21,365
Amounts reclassified from accumulated other comprehensive income (loss)	(645)	256	(170)	876
Total other comprehensive income (loss), net of tax	3,694	(4,868)	19,916	22,241
Balance, end of period	(13,809)	6,895	(13,809)	6,895
Securities Available for Sale and Interest-Only Strips
Changes in accumulated other comprehensive income by component
Balance, beginning of period	(13,491)	15,898	(28,601)	(9,707)
Other comprehensive income (loss)	3,082	(4,728)	17,703	20,243
Amounts reclassified from accumulated other comprehensive income (loss)	(637)	264	(148)	898
Total other comprehensive income (loss), net of tax	2,445	(4,464)	17,555	21,141
Balance, end of period	(11,046)	11,434	(11,046)	11,434
Net Investment Hedges
Changes in accumulated other comprehensive income by component
Balance, beginning of period	5,031	5,019	6,493	7,249
Other comprehensive income (loss)	(1,682)	561	(3,144)	(1,669)
Amounts reclassified from accumulated other comprehensive income (loss)	0	0	0	0
Total other comprehensive income (loss), net of tax	(1,682)	561	(3,144)	(1,669)
Balance, end of period	3,349	5,580	3,349	5,580
Foreign Currency Translation Adjustment
Changes in accumulated other comprehensive income by component
Balance, beginning of period	(9,176)	(9,316)	(11,764)	(13,064)
Other comprehensive income (loss)	2,939	(957)	5,527	2,791
Amounts reclassified from accumulated other comprehensive income (loss)	0	0	0	0
Total other comprehensive income (loss), net of tax	2,939	(957)	5,527	2,791
Balance, end of period	(6,237)	(10,273)	(6,237)	(10,273)
Recognized Postretirement Prior Service Cost
Changes in accumulated other comprehensive income by component
Balance, beginning of period	133	162	147	176
Other comprehensive income (loss)	0	0	0	0
Amounts reclassified from accumulated other comprehensive income (loss)	(8)	(8)	(22)	(22)
Total other comprehensive income (loss), net of tax	(8)	(8)	(22)	(22)
Balance, end of period	$ 125	$ 154	$ 125	$ 154