Loans and Leases - Additional Information (Detail) - USD ($) |
3 Months Ended | |
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Mar. 31, 2019 |
Dec. 31, 2018 |
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| Accounts, Notes, Loans and Financing Receivable [Line Items] | ||
| Total gross loans and leases receivable | $ 4,575,620,000 | $ 4,600,540,000 |
| Accrued interest receivable | 13,397,000 | 13,331,000 |
| Loans and leases receivable pledged to secure advances | 1,100,000,000 | 1,100,000,000 |
| Loans and leases 90 days or more past due and still accruing | 0 | 4,000 |
| Commitments to lend additional funds to borrowers whose loans are impaired | 0 | 0 |
| TDR loans receivable | $ 10,000,000 | 10,300,000 |
| Principal and interest due | 3 months | |
| Reserves relating to loans included in allowance for loan losses | $ 397,000 | 313,000 |
| Home equity line of credit | ||
| Accounts, Notes, Loans and Financing Receivable [Line Items] | ||
| Total gross loans and leases receivable | 9,900,000 | 10,300,000 |
| Loans and lease receivables | ||
| Accounts, Notes, Loans and Financing Receivable [Line Items] | ||
| Accrued interest receivable | $ 11,500,000 | $ 10,900,000 |
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- Definition Loans held for sale excluded from TDR loans receivable. No definition available.
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- Definition Maximum period for interest to be due. No definition available.
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- Definition Reserve related to TDR loans included in the allowance for loan losses. No definition available.
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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. No definition available.
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- Definition Recorded investment in financing receivables that are 90 days or more past due and still accruing. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Carrying amount as of the balance sheet date of interest earned but not received. Also called accrued interest or accrued interest receivable. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Reflects the unfunded portion of contractual agreements to lend funds to borrowers for loans whose terms have been modified by troubled debt restructuring. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Carrying amount as of the balance sheet date of loans that have been pledged as collateral for borrowings. If the secured party has the right by contract or custom to sell or re-pledge the collateral, then the debtor reclassifies that asset and report that asset in its statement of financial position separately from other assets not so encumbered. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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