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Employee Benefit Plans - Narrative (Details) $ in Thousands | 12 Months Ended
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Dec. 31, 2021 USD ($) pensionPlan shares | Dec. 31, 2020 USD ($) shares | Dec. 31, 2019 USD ($)
Defined Contribution Plan Disclosure [Line Items] |  |  |
Number of non-contributory defined-contribution retirement plans | pensionPlan | 2 |  |
Number of shares issued | shares | 14,696,911 | 14,964,389 |
Fair value of shares issued | $ 1,470 | $ 1,496 |
Expenses related to defined-contribution plans | 4,400 | 4,400 | $ 4,000
Actuarial (gain) loss | $ (6,400) | $ 15,500 |
Expected long-term rate of return | 6.50% | 6.75% | 7.00%
Compensation expense related to the profit-sharing | $ 5,400 | $ 4,500 | $ 4,400
Maximum match (as a percent) | 4.00% |  |
Expense associated with matching provisions | $ 3,000 | 2,900 | $ 2,900
Life insurance assets | 86,495 | 84,736 |
Split dollar life insurance benefits |  |  |
Defined Contribution Plan Disclosure [Line Items] |  |  |
Estimated liability | 1,500 | 1,700 |
Compensation expense related to the split dollar life insurance | 52 | 55 |
DB Pension Plan |  |  |
Defined Contribution Plan Disclosure [Line Items] |  |  |
Accumulated benefit obligation | 93,000 | 98,000 |
Funded (unfunded) status of plan | 3,384 | (8,849) |
Actuarial (gain) loss | $ (2,834) | 10,046 |
DC Retirement Plan |  |  |
Defined Contribution Plan Disclosure [Line Items] |  |  |
Requisite service period | 1 year |  |
Annual contribution limit (as a percent) | 4.00% |  |
Accumulated benefit obligation | $ 10,100 | 10,500 |
Funded (unfunded) status of plan | (10,055) | (10,508) |
Actuarial (gain) loss | (574) | 1,340 |
SERP Plan |  |  |
Defined Contribution Plan Disclosure [Line Items] |  |  |
Accumulated benefit obligation | 34,000 | 36,700 |
Funded (unfunded) status of plan | (34,033) | (36,710) |
Actuarial (gain) loss | $ (3,002) | $ 4,070 |

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- Definition The carrying amount of a life insurance policy on an officer, executive or employee for which the reporting entity (a bank) is entitled to proceeds from the policy upon death of the insured or surrender of the insurance policy. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(10)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 + Details
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