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Leases | 12 Months Ended
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Dec. 31, 2020
Leases [Abstract] |
Leases | 16. Leases ​ The following table summarizes the operating lease ROU assets and liabilities at and for the period indicated: ​ ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | At or for the | ​ | At or for the
​ | ​ | twelve months ended | ​ | twelve months ended
(Dollars in thousands) | ​ | December 31, 2020 | ​ | December 31, 2019
​ | ​ | ​ | ​ | ​ | ​ | ​
Operating lease ROU assets | ​ | $ | 50,743 | ​ | $ | 41,254
​ | ​ | ​ | ​ | ​ | ​ | ​
Operating lease liabilities | ​ | $ | 59,100 | ​ | $ | 49,367
​ | ​ | ​ | ​ | ​ | ​ | ​
Lease Cost | ​ | ​ | ​ | ​ | ​ | ​
Operating lease cost | ​ | $ | 7,725 | ​ | $ | 7,575
Short-term lease cost | ​ | ​ | 139 | ​ | ​ | 136
Variable lease cost | ​ | ​ | 1,128 | ​ | ​ | 1,020
Total lease cost | ​ | $ | 8,992 | ​ | $ | 8,731
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
Other information | ​ | ​ | ​ | ​ | ​ | ​
Cash paid for amounts included in the measurement of lease liabilities | ​ | ​ | ​ | ​ | ​ | ​
Operating cash flows from operating leases | ​ | $ | 8,316 | ​ | $ | 8,051
Right-of-use assets obtained in exchange for new operating lease liabilities | ​ | $ | 5,484 | ​ | $ | 1,576
Right-of-use assets obtained in acquisition | ​ | $ | 9,993 | ​ | $ | —
Weighted-average remaining lease term-operating leases | ​ | ​ | 8.3 years | ​ | ​ | 7.5 years
Weighted average discount rate-operating leases | ​ | ​ | 3.2% | ​ | ​ | 3.8%
​ ​ ​ The rental expense under legacy lease accounting totaled $6.1 million for the year ended 2018. ​ The Company’s minimum annual rental payments at December 31, 2020 for Bank facilities due under non-cancelable leases are as follows: ​
​ | ​ | ​ | ​
​ | ​ | Minimum Rental
​ | ​ | (In thousands)
Years ended December 31: | ​ | ​ | ​
2021 | ​ | $ | 8,757
2022 | ​ | ​ | 8,871
2023 | ​ | ​ | 9,006
2024 | ​ | ​ | 8,847
2025 | ​ | ​ | 8,212
Thereafter | ​ | ​ | 23,547
Total minimum payments required | ​ | ​ | 67,240
Less: implied interest | ​ | ​ | 8,140
Total lease obligations | ​ | $ | 59,100
​ The Company’s minimum annual rental payments at December 31, 2019 for Bank facilities due under non-cancelable leases are as follows: ​
​ | ​ | ​ | ​
​ | ​ | Minimum Rental
​ | ​ | (In thousands)
Years ended December 31: | ​ | ​ | ​
2020 | ​ | $ | 8,113
2021 | ​ | ​ | 7,675
2022 | ​ | ​ | 7,260
2023 | ​ | ​ | 7,397
2024 | ​ | ​ | 7,425
Thereafter | ​ | ​ | 19,148
Total minimum payments required | ​ | ​ | 57,018
Less: implied interest | ​ | ​ | 7,651
Total lease obligations | ​ | $ | 49,367
​

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- Definition The entire disclosure for operating leases of lessee. Includes, but is not limited to, description of operating lease and maturity analysis of operating lease liability. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -URI http://asc.fasb.org/subtopic&trid=77888251 + Details
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