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Accumulated Other Comprehensive Income (Loss) (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Changes in accumulated other comprehensive income, net of tax    
Beginning Balance $ (4,205) $ (3,617)
Other comprehensive income (loss) before reclassifications 932 68
Ending Balance $ (3,273) $ (3,549)