Commitments and Contingent Liabilities (Details 1) (USD $)	Dec. 31, 2012
Operating Leases [Member]
Operating Leases, Future Minimum Payments Due [Abstract]
Operating Leases, Future Minimum Payments Due, Current	$ 14,609,000
Operating Leases, Future Minimum Payments, Due in Two Years	12,378,000
Operating Leases, Future Minimum Payments, Due in Three Years	7,089,000
Operating Leases, Future Minimum Payments, Due in Four Years	6,369,000
Operating Leases, Future Minimum Payments, Due in Five Years	5,152,000
Operating Leases, Future Minimum Payments, Due Thereafter	18,876,000
Sublease Income [Member]
Operating Leases, Future Minimum Payments Due [Abstract]
Operating Leases, Future Minimum Payments Due, Current	827,000
Operating Leases, Future Minimum Payments, Due in Two Years	827,000
Operating Leases, Future Minimum Payments, Due in Three Years	827,000
Operating Leases, Future Minimum Payments, Due in Four Years	776,000
Operating Leases, Future Minimum Payments, Due in Five Years	160,000
Operating Leases, Future Minimum Payments, Due Thereafter	$ 0