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Commitments and Contingent Liabilities (Tables) | 12 Months Ended
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Dec. 31, 2017
Commitments And Contingencies Disclosure [Abstract] |
Summary of Financial Instruments with Off-Balance-Sheet Risks | The amounts of financial instruments with off-balance-sheet risk are as follows:
|  | December 31, |
|  | 2017 |  |  | 2016 |
|  | (Dollars in thousands) |
Loan commitments |  | $ | 1,050,686 |  |  | $ | 981,777 |
Stand-by letters of credit |  |  | 57,074 |  |  |  | 56,551 |
Summary of Future Minimum Rental Payments Under Lease | The future minimum rental payments under these leases at December 31, 2017, were as follows (Dollars in thousands):
2018 |  | $ | 1,143 |
2019 |  |  | 1,030 |
2020 |  |  | 774 |
2021 |  |  | 554 |
2022 |  |  | 369 |
Later years |  |  | 573 |
Total |  | $ | 4,443 |
Summary of Rental Expense | Rental expense on all property and equipment rented, including those rented on a monthly or temporary basis were as follows (Dollars in thousands):
Year Ending December 31: |  |  |  |
2017 |  | $ | 1,597 |
2016 |  |  | 1,524 |
2015 |  |  | 1,360 |

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- Definition Tabular disclosure of future minimum payments required in the aggregate and for each of the five succeeding fiscal years for operating leases having initial or remaining noncancelable lease terms in excess of one year and the total minimum rentals to be received in the future under noncancelable subleases as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=77902758&loc=d3e41502-112717 + Details
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- Definition Tabular disclosure of rental expense from operating leases for each period for which an income statement is presented with separate amounts for minimum rentals, contingent rentals, and sublease rentals. Rental payments under leases with terms of a month or less that were not renewed need not be included. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=77902758&loc=d3e41499-112717 + Details
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