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FHLB Advances and Other Borrowings - Additional Information (Detail) - USD ($) | 12 Months Ended
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Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Federal Home Loan Banks [Abstract] |  |  |
Pledged loans receivable, carrying value | $ 993,200,000 |  |
Total borrowing capacity available from the collateral | 736,600,000 |  |
Available borrowing capacity | 421,600,000 |  |
Available for use through the Fed Discount Window | 10,500,000 |  |
Pledged loans, carrying values | 10,700,000 |  |
Borrowings | 0 |  |
Advances from the FHLB | 315,000,000 | $ 170,000,000 |
Increase in the advances from the FHLB | 145,000,000 |  |
Interest on FHLB advances | $ 879,000 | $ 76,000 | $ 151,000
Weighted-average interest rates | 0.45% | 0.20% | 0.21%

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- Definition Borrowing capacity available based on pledged collateral. + References No definition available. + Details
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- Definition Borrowing capacity based on pledged collateral. + References No definition available. + Details
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- Definition Carrying Value Of Loans Pledged As Collateral For FHLB Advances + References No definition available. + Details
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- Definition Amount of borrowings as of the balance sheet date from the Federal Home Loan Bank, which are primarily used to cover shortages in the required reserve balance and liquidity shortages. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6479118&loc=d3e64650-112822 + Details
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- Definition The calculated weighted average interest rate for Federal Home Loan Bank advances for the period ended as of the Balance Sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.13(3)(a)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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- Definition Interest expense incurred during the reporting period on short-term borrowings associated with Federal Home Loan Bank and Federal Reserve Bank advances. + References No definition available. + Details
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- Definition Amount after allowance and deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes loans held for sale. Excludes loans and leases covered under loss sharing agreements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.7(a)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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