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Consolidated Statements Of Comprehensive Income (Loss) (Parenthetical) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Consolidated Statements Of Comprehensive Income (Loss) [Abstract]    
Unrealized gains on derivatives arising during period, tax expense $ 968 $ 756
Reclassification of realized gains on derivatives, tax expense $ 1,848 $ 707