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Accumulated Other Comprehensive Income (Loss) (Components of Accumulated Other Comprehensive Income and Accumulated Other Comprehensive Income) (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Accumulated Other Comprehensive Income (Loss) [Abstract]    
Beginning balance [1] $ (4,119) $ 488
Other comprehensive income before reclassification [1] 806 1,333
Amount reclassified from accumulated other comprehensive income [1] (4) (42)
Other comprehensive income [1] 802 1,291
Ending balance [1] $ (3,317) $ 1,779
[1] All amounts are net of tax. Amounts in parentheses indicate debits.