Derivatives (Narratives) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2015	Dec. 31, 2014
Interest Rate Derivatives [Abstract]
Total notional amount of Company's variable interest rate swaps on debt	$ 291,900		$ 291,900
Notional amount of operating lease	9,700		9,700
Reclassify net losses on interest rate contracts from AOCI to earnings over the next twelve months			10,500
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax	$ 2,699	$ 980	5,554	$ 4,599
Loss reclassified from AOCI into income (effective portion)			$ 9,736	$ 10,919