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v3.20.4

Employee Benefit Plans (Details) | 12 Months Ended
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Dec. 31, 2020 USD ($) hour | Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($)
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items] |  |  |
Percentage of employer contribution fully vested | 100.00% |  |
Accrued expenses and other liabilities | Washington Banking |  |  |
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items] |  |  |
Carrying value of obligation | $ 165,000 | $ 200,000 |
401(k) Plan and Trust Salary Saving Plan |  |  |
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items] |  |  |
Employer matching contribution, percent of employee's gross pay | 50.00% |  |
Maximum annual contributions per employee, percent | 3.00% |  |
Defined contribution plan, employer matching contribution amount | $ 1,700,000 | 1,600,000 | $ 1,400,000
401(k) Plan and Trust |  |  |
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items] |  |  |
Minimum hours of service required for eligibility under the plan | hour | 1,000 |  |
Minimum age required for eligibility under the plan | 18 years |  |
Employer profit sharing contributions | $ 0 | $ 0 | $ 0

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- Definition Amount of accrued obligation to policyholders that relates to insured events under long-term life insurance contracts. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.13(a)(1)) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 25 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=121639894&loc=d3e13145-158430 + Details
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