Commitments (Schedule Of Future Minimum Lease Payments Under Noncancelable Operating Leases And Future Minimum Capital Lease Payments) (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Commitments [Abstract]
Capital Leases, 2016	$ 1,645
Capital Leases, 2017	1,678
Capital Leases, 2018	1,712
Capital Leases, 2019	1,746
Capital Leases, 2020	1,781
Capital Leases, thereafter	4,134
Capital Leases, total minimum lease payments	12,696
Less: amount representing interest	3,851
Present value of minimum lease payments	8,845
Less: current installments	778	$ 676
Capital lease obligations, less current installments	8,067	$ 8,845
Operating Leases, 2016	12,232
Operating Leases, 2017	9,461
Operating Leases, 2018	7,093
Operating Leases, 2019	5,191
Operating Leases, 2020	4,019
Operating Leases, thereafter	7,789
Operating Leases, total minimum lease payments	$ 45,785