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DERIVATIVES - Additional Information (Details) $ in Thousands | Jun. 30, 2019 USD ($) entity | Dec. 31, 2018 USD ($) entity
--- | --- | ---
Derivative [Line Items] |  |
Inerest-bearing deposit liability | $ 3,170,900 | $ 2,719,980
Number of counterparties | entity | 16 | 13
Derivative Financial Instruments, Liabilities, Fair Value Disclosure | $ 68,932 | $ 29,188
Interest Rate Lock Commitments [Member] |  |
Derivative [Line Items] |  |
Inerest-bearing deposit liability | 52,800 | 20,800
Other Credit Derivatives [Member] |  |
Derivative [Line Items] |  |
Inerest-bearing deposit liability | 52,800 | 12,300
Credit Risk Derivative Liabilities, at Fair Value | 0 | 0
Credit Risk Contract [Member] |  |
Derivative [Line Items] |  |
Inerest-bearing deposit liability | 155,600 | 138,400
Credit Risk Derivative Liabilities, at Fair Value | 300 | 100
Accrued interest and other liabilities | Derivative [Member] |  |
Derivative [Line Items] |  |
Inerest-bearing deposit liability | 1,600,000 | 1,400,000
Derivative Financial Instruments, Liabilities, Fair Value Disclosure | $ 64,100 | $ 4,900

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- Definition Aggregate notional amount specified by the derivative(s). Expressed as an absolute value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + Details
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- Definition Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities not subject to a master netting arrangement and not elected to be offset. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=118260190&loc=d3e13433-108611 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=99393222&loc=SL20226008-175313 + Details
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