Employee Benefit Plans - Schedule of Components of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Unrecognized prior service costs	$ 0	$ 0	$ 0
Unrecognized net actuarial income	38,909	76,686	68,752
Total accumulated other comprehensive income	38,909	76,686	68,752
RIM Plan
Defined Benefit Plan Disclosure [Line Items]
Unrecognized prior service costs	0	0	0
Unrecognized net actuarial income	5,730	7,686	5,777
Total accumulated other comprehensive income	5,730	7,686	5,777
Post-retirement Plan
Defined Benefit Plan Disclosure [Line Items]
Unrecognized prior service costs	0	0	0
Unrecognized net actuarial income	6,999	12,417	7,221
Total accumulated other comprehensive income	6,999	12,417	7,221
Split-Dollar Life Insurance
Defined Benefit Plan Disclosure [Line Items]
Unrecognized prior service costs	350	405	461
Unrecognized net actuarial income	7,071	8,741	6,058
Total accumulated other comprehensive income	$ 7,421	$ 9,146	$ 6,519