Loans And Leases Receivable, Measurement Input

No definition available.

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Period Type:	instant

- Definition

Repossessed And Returned Assets, Measurement Input

+ References

No definition available.

+ Details

Name:	tcf_RepossessedAndReturnedAssetsMeasurementInput
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Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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Period Type:	duration

- Definition

For each line item in the statement of financial position, the amounts of gains and losses from fair value changes included in earnings.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 30
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=75031198&loc=d3e14172-108612

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

This item represents the aggregate fair value of loans held as assets that are in nonaccrual status for which the fair value option has been elected, if the entity's policy is to recognize interest income separately from other changes in fair value.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 28
-Subparagraph (e)(2)
-URI http://asc.fasb.org/extlink&oid=75031198&loc=d3e14064-108612

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Value of input used to measure real estate owned by financial institution by financial institution which is not directly related to its business.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)
-URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258

+ Details

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Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	instant

- Details

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- Details

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- Details

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- Details

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Data Type:	na
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Period Type:

- Details

Name:	us-gaap_FinancialInstrumentAxis=tcf_LoansHeldForSaleMember
Namespace Prefix:
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Fair Values Measurements - Narrative (Details)	3 Months Ended		9 Months Ended
Fair Values Measurements - Narrative (Details)	Sep. 30, 2019 USD ($)	Sep. 30, 2018 USD ($)	Sep. 30, 2019 USD ($)	Sep. 30, 2018 USD ($)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Amount of loans recorded under the fair value option that were delinquent or on non-accrual status	$ 0		$ 0
Minimum \| Discount rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans and leases, measurement input	0.1000		0.1000
Repossessed and returned assets, measurement input	0.2000		0.2000
Maximum \| Discount rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans and leases, measurement input	0.5400		0.5400
Other real estate owned, measurement input	0.0800		0.0800
Repossessed and returned assets, measurement input	0.3000		0.3000
Net (loss) gain on sales of loans and leases \| Loans Held for Sale
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Net gain from initial measurement of the correspondent lending loans held for sale and subsequent changes in fair value for loans outstanding	$ 12,400,000	$ 2,700,000	$ 18,300,000	$ 6,900,000