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Stockholders' Equity AOCI (Details) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2014
Mar. 31, 2014
Dec. 31, 2013
Jun. 30, 2013
Mar. 31, 2013
Dec. 31, 2012
Components of accumulated other comprehensive loss            
Total accumulated other comprehensive loss $ (17,610) $ (18,905) $ (18,743) $ (22,881) $ (20,693) $ (21,071)