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Employee Benefits (Tables) | 12 Months Ended
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Dec. 31, 2020
Employee Benefits |
Schedule of retirement plan contributions under employee benefits | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, | ​ | December 31, | ​ | December 31,
(dollars in thousands) |  | 2020 |  | 2019 |  | 2018
Salary reduction plan | ​ | $ | 2,960 | ​ | $ | 2,599 | ​ | $ | 2,402
ESOP | ​ |  | 2,166 | ​ |  | 1,836 | ​ |  | 1,665
Total | ​ | $ | 5,126 | ​ | $ | 4,435 | ​ | $ | 4,067
Total ESOP shares outstanding | ​ |  | 1,170,611 | ​ |  | 1,307,439 | ​ |  | 1,334,372

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- Definition Tabular disclosure of defined contribution pension plans or defined contribution other postretirement plans, separately for pension plans and other postretirement benefit plans. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 70 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=49170846&loc=d3e28014-114942 + Details
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