Commitments and Contingencies Lease Commitments (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Commitments and Contingencies Disclosure [Abstract]
Operating Leases, Future Minimum Payments Due, Less than 1 year	$ 378,000
Operating Leases, Future Minimum Payments, 1 year to 3 years	392,000
Operating Leases, Future Minimum Payments, 3 years to 5 years	40,000
Operating Leases, Future Minimum Payments, More than 5 years	0
Operating Leases, Future Minimum Payments Due	810,000
Operating Leases, Rent Expense, Net	$ 600,000	$ 500,000	$ 500,000