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Financial Instruments - Balance Sheet Location (Details) (Fair Value, Measurements, Recurring [Member], USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Level 1 [Member]
Assets [Abstract]
Foreign currency cash flow hedges	$ 0	$ 0
Liabilities [Abstract]
Foreign currency cash flow hedges	0	0
Net investment hedge derivative - cross currency swap	0	0
Level 2 [Member]
Assets [Abstract]
Foreign currency cash flow hedges	973	879
Liabilities [Abstract]
Foreign currency cash flow hedges	810	168
Net investment hedge derivative - cross currency swap	15,567	23,716
Level 3 [Member]
Assets [Abstract]
Foreign currency cash flow hedges	0	0
Liabilities [Abstract]
Foreign currency cash flow hedges	0	0
Net investment hedge derivative - cross currency swap	$ 0	$ 0

Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities not subject to a master netting arrangement and not elected to be offset.

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