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Other Comprehensive Income (Loss) Components of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($)
$ in Thousands
3 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Other Comprehensive Income (Loss), Net of Tax [Abstract]    
Accumulated Other Comprehensive Loss, Available-for-sale Securities Adjustment, Net of Tax $ (1,940) $ (307)
Other comprehensive loss, net of taxes 376 359
Accumulated Other Comprehensive Loss, Available-for-sale Securities Adjustment, Net of Tax $ (1,564) $ 52