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Commitments (Schedule Of Capital Lease Obligations Outstanding) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Commitments [Abstract]
Capital lease obligations	$ 9,521us-gaap_CapitalLeaseObligations	$ 10,103us-gaap_CapitalLeaseObligations
Less current installments	676us-gaap_CapitalLeaseObligationsCurrent	582us-gaap_CapitalLeaseObligationsCurrent
Capital lease obligations, less current installments	$ 8,845	$ 9,521

Amount equal to the present value (the principal) at the beginning of the lease term of minimum lease payments during the lease term (excluding that portion of the payments representing executory costs such as insurance, maintenance, and taxes to be paid by the lessor, together with any profit thereon) net of payments or other amounts applied to the principal, through the balance sheet date and due to be paid more than one year (or one operating cycle, if longer) after the balance sheet date.

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