Commitments, Contingencies and Concentrations of Credit Risk (Narrative) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Commitments, Contingencies and Concentrations of Credit Risk [Abstract]
Operating Leases, Rent Expense	$ 805	$ 710	$ 692
Operating Leases, Future Minimum Payments, Next Rolling Twelve Months	884
Operating Leases, Future Minimum Payments, Due in Rolling Year Two	884
Operating Leases, Future Minimum Payments, Due in Rolling Year Three	895
Operating Leases, Future Minimum Payments, Due in Rolling Year Four	784
Operating Leases, Future Minimum Payments, Due in Rolling Year Five	796
Operating Leases, Future Minimum Payments, Due in Rolling after Year Five	$ 8,091