Consolidated Statements of Comprehensive Income Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Change in derivatives qualifying as hedges, taxes	$ (64)	$ (71)
Unrealized holding (loss) gain arising during the period, taxes	98	(150)
Reclassification adjustment for (gain) loss included in net income, taxes	(2)	9
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net Transition Asset (Obligation), before Tax	$ 93	$ (1)