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ADVANCES FROM THE FEDERAL HOME LOAN BANK (FHLB) - Advances from FHLB Mature (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Federal Home Loan Bank Advances Branch Of F H L B Bank [Line Items]
Federal Home Loan Bank Advances	$ 715,000	$ 670,000
One to three years
Federal Home Loan Bank Advances Branch Of F H L B Bank [Line Items]
Federal Home Loan Bank Advances	300,000
Three to five years
Federal Home Loan Bank Advances Branch Of F H L B Bank [Line Items]
Federal Home Loan Bank Advances	320,000
Six months to one year [Member]
Federal Home Loan Bank Advances Branch Of F H L B Bank [Line Items]
Federal Home Loan Bank Advances	$ 95,000

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- Definition

Amount of Federal Home Loan Bank (FHLBank) advances to member financial institutions.

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- 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.

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