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Leases (Tables) | 9 Months Ended
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Sep. 30, 2021
Leases [Abstract] |
Summary of supplemental balance sheet information related to leases | ​
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(Dollars in thousands) | ​ | September 30, 2021 | ​ | December 31, 2020 | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Operating lease ROU asset | ​ | $ | 50,155 | ​ | $ | 50,743 | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Operating lease liability | ​ | $ | 54,239 | ​ | $ | 59,100 | ​
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Weighted-average remaining lease term-operating leases | ​ |  | 7.5 years | ​ |  | 8.3 years | ​
Weighted average discount rate-operating leases | ​ |  | 3.2 | % |  | 3.2 | %
Schedule of components of lease expense and cash flow information related to leases | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | For the three months ended | ​
(Dollars in thousands) | ​ | September 30, 2021 | ​ | September 30, 2020 | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Lease Cost | ​ |  |  | ​ |  |  | ​
Operating lease cost | ​ | $ | 2,217 | ​ | $ | 1,895 | ​
Short-term lease cost | ​ |  | 34 | ​ |  | 34 | ​
Variable lease cost | ​ |  | 230 | ​ |  | 281 | ​
Total lease cost | ​ | $ | 2,481 | ​ | $ | 2,210 | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Other information | ​ |  |  | ​ |  |  | ​
Cash paid for amounts included in the measurement of lease liabilities | ​ |  |  | ​ |  |  | ​
Operating cash flows from operating leases | ​ | $ | 2,435 | ​ | $ | 2,101 | ​
Right-of-use assets obtained in exchange for new operating lease liabilities | ​ | $ | 28 | ​ | $ | 6,772 | ​
​ ​
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​ |  | For the nine months ended
(Dollars in thousands) | ​ | September 30, 2021 | ​ | September 30, 2020
​ | ​ | ​ | ​ | ​ | ​ | ​
Lease Cost | ​ |  |  | ​ |  |
Operating lease cost | ​ | $ | 6,565 | ​ | $ | 5,676
Short-term lease cost | ​ |  | 129 | ​ |  | 102
Variable lease cost | ​ |  | 826 | ​ |  | 832
Total lease cost | ​ | $ | 7,520 | ​ | $ | 6,610
​ | ​ | ​ | ​ | ​ | ​ | ​
Other information | ​ |  |  | ​ |  |
Cash paid for amounts included in the measurement of lease liabilities | ​ |  |  | ​ |  |
Operating cash flows from operating leases | ​ | $ | 10,483 | ​ | $ | 6,283
Right-of-use assets obtained in exchange for new operating lease liabilities | ​ | $ | 4,827 | ​ | $ | 6,822
Schedule of Minimum annual rental payments for Bank facilities due under non-cancelable leases | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | For the nine months ended
(Dollars in thousands) | ​ | September 30, 2021 | ​ | September 30, 2020
​ | ​ | ​ | ​ | ​ | ​ | ​
Lease Cost | ​ |  |  | ​ |  |
Operating lease cost | ​ | $ | 6,565 | ​ | $ | 5,676
Short-term lease cost | ​ |  | 129 | ​ |  | 102
Variable lease cost | ​ |  | 826 | ​ |  | 832
Total lease cost | ​ | $ | 7,520 | ​ | $ | 6,610
​ | ​ | ​ | ​ | ​ | ​ | ​
Other information | ​ |  |  | ​ |  |
Cash paid for amounts included in the measurement of lease liabilities | ​ |  |  | ​ |  |
Operating cash flows from operating leases | ​ | $ | 10,483 | ​ | $ | 6,283
Right-of-use assets obtained in exchange for new operating lease liabilities | ​ | $ | 4,827 | ​ | $ | 6,822

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- Definition Tabular disclosure of lessee's lease cost. Includes, but is not limited to, interest expense for finance lease, amortization of right-of-use asset for finance lease, operating lease cost, short-term lease cost, variable lease cost and sublease income. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=121609121&loc=SL77918686-209980 + Details
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- Definition Tabular disclosure of undiscounted cash flows of lessee's operating lease liability. Includes, but is not limited to, reconciliation of undiscounted cash flows to operating lease liability recognized in statement of financial position. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=121609121&loc=SL77918701-209980 + Details
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