Contingencies and Commitments (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Undiscounted reserve
Reserve balance at beginning of year	$ (5,312)	$ (5,201)
Expensed	(316)	(528)
Paid	327	417
Reserve balance at end of year	(5,301)	(5,312)
Ending balance recorded in:
Other liabilities and accrued items	(903)	(1,000)
Other long-term liabilities	$ (4,398)	$ (4,312)