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Condensed Consolidated Statements of Income (Unaudited) (Parenthetical) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Income Statement [Abstract]        
Accumulated other comprehensive earnings reclassifications $ 0 $ 0 $ 875 $ 124
Income tax expense from reclassification $ 0 $ 0 $ 306 $ 43