Retirement Agreements and Other Postretirement Benefit Plan Changes in Amounts Related to Accumulated Other Comprehensive Income, Pre-tax (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance at beginning of year	$ 184	$ 82
Unrecognized prior service cost	0	0
Amortization of loss, net	0	0
Actuarial loss (gain)	0	102
Balance at end of year	$ 184	$ 184