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DERIVATIVES - Additional Information (Detail) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2018 USD ($) entity | Dec. 31, 2017 USD ($) entity
Derivative [Line Items] |  |
Maximum derivative notional position as a percentage of assets | 35.00% |
Maximum credit exposure as a percentage of capital | 3.00% |
Maximum single counterparty credit risk exposure | $ 20,000 |
Number of counterparties | entity | 13 | 13
Derivative Asset | $ 29,189 | $ 12,682
Interest-bearing deposit swap | 2,719,980 | 1,674,080
Derivative Liability | 29,188 | 12,687
Other Credit Derivatives [Member] |  |
Derivative [Line Items] |  |
Outstanding liability from counterparty contracts |  | 100
Interest-bearing deposit swap | 12,300 | 15,400
Interest Rate Lock Commitments [Member] |  |
Derivative [Line Items] |  |
Interest-bearing deposit swap | 20,800 | 12,300
Credit Risk Contract [Member] |  |
Derivative [Line Items] |  |
Outstanding liability from counterparty contracts | 100 | 54
Interest-bearing deposit swap | 138,400 | 95,900
Derivative [Member] | Other Liabilities [Member] |  |
Derivative [Line Items] |  |
Derivative Asset | 4,900 |
Interest-bearing deposit swap | $ 1,400,000 | 837,500
Derivative Liability |  | $ 1,300

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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 Maximum amount of loss due to credit risk that, based on the gross fair value of the financial instrument, the entity would incur if parties to the financial instruments that make up the concentration failed completely to perform according to the terms of the contracts and the collateral or other security, if any, for the amount due proved to be of no value to the entity. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109250915&loc=d3e13537-108611 + Details
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