Contingencies and Commitments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Undiscounted reserve
Reserve balance at beginning of year	$ 6,521	$ 6,499
Expensed	482	718
Paid	(1,066)	(696)
Reserve balance at end of year	5,937	6,521
Ending balance recorded in:
Other liabilities and accrued items	982	1,168
Other long-term liabilities	$ 4,955	$ 5,353