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Employee Benefit Plans - Narrative (Details) $ in Thousands | 1 Months Ended | 12 Months Ended
--- | --- | ---
Jan. 02, 2018 | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($) calendar_year | Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($) | Dec. 31, 2012
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Employer matching contribution percentage |  |  | 6.00% |  |  |
Amortization of unrecognized net actuarial loss |  |  | $ (686) | $ (814) | $ (21) |
401(k) Plan |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Deferral rate |  |  | 5.00% |  |  |
Percent of annual salary employees may contribute |  |  | 15.00% |  |  |
Percent matched by company up to 6 percent of employee salary | 100.00% |  |  |  |  |
Matching contributions |  |  | $ 4,300 | 4,200 | 3,600 |
Pension Plan |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Percentage of Final Average Annual Compensation (five highest consecutive calendar year's earnings out of the last ten years of employment) |  |  |  |  |  | 0.75%
Number of highest consecutive calendar years of earnings | calendar_year |  |  | 5 |  |  |
Percentage of Final Average Annual Compensation in excess of average social security wage base |  |  | 0.65% |  |  |
Years of service used for Final Average Annual Compensation in excess of average social security wage base calculation |  |  | 35 years |  |  |
Vesting period |  |  | 5 years |  |  |
Accumulated benefit obligation |  |  | $ 44,750 | 41,592 | 36,354 |
Amortization of unrecognized net actuarial loss |  |  | $ (843) | (977) |  |
SERP |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Number of highest consecutive calendar years of earnings | calendar_year |  |  | 5 |  |  |
Accumulated benefit obligation |  |  | $ 5,982 | 5,638 | $ 5,794 |
Amortization of unrecognized net actuarial loss |  |  | $ 157 | $ 163 |  |
Lifetime monthly pension benefits, percent |  |  | 3.00% |  |  |
Maximum percent of final average compensation |  |  | 60.00% |  |  |
Percent of participant's primary social security benefit |  |  | 50.00% |  |  |
Forecast | Pension Plan |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Amortization of unrecognized net actuarial loss |  | $ 590 |  |  |  |
Forecast | SERP |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Amortization of unrecognized net actuarial loss |  | $ 15 |  |  |  |
Maximum | Pension Plan |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Years of service used for Final Average Annual Compensation calculation |  |  | 40 years |  |  |
Maximum | SERP |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Maximum years of service |  |  | 20 years |  |  |

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- Definition Defined Benefit Plan, Final Average Compensation, Number Of Highest Consecutive Calendar Years Of Earnings During Last Ten Years + References No definition available. + Details
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