Contingencies and Commitments - Undiscounted Reserve (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Undiscounted reserve
Reserve balance at beginning of year	$ 5,476	$ 5,937
Expensed	185	288
Paid	(891)	(749)
Reserve balance at end of year	4,770	5,476
Ending balance recorded in:
Other liabilities and accrued items	539	845
Other long-term liabilities	$ 4,231	$ 4,631