Employee Benefit Plans - Narrative (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2021 USD ($) calendar_year	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Defined Benefit Plan Disclosure [Line Items]
Employer matching contribution percentage	6.00%
Amortization of unrecognized net actuarial loss	$ (592)	$ (686)	$ (814)
401(k) Plan
Defined Benefit Plan Disclosure [Line Items]
Deferral rate	6.00%
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	4,300	4,200
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	$ 41,700	44,800	41,600
Amortization of unrecognized net actuarial loss	$ (577)	(843)
SERP
Defined Benefit Plan Disclosure [Line Items]
Number of highest consecutive calendar years of earnings | calendar_year	5
Accumulated benefit obligation	$ 4,700	6,000	$ 5,600
Amortization of unrecognized net actuarial loss	$ (15)	$ 157
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%
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