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Summary of Operations and Significant Accounting Policies (Comprehensive Income) (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Comprehensive Income [Abstract]    
Accumulated Comprehensive Income Translation Adjustmentax $ (16,210) $ (22,663)
Accumulated Comprehensive Income Defined Benefit Plan (28,164) (11,193)
Accumulated other comprehensive loss $ (44,374) $ (33,856)