Derivatives (Narratives) (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Interest Rate Derivatives [Abstract]
Total notional amount of Company's variable interest rate swaps on debt	$ 277,100
Notional amount of operating lease	9,000
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax	1,290	$ 2,089
Loss reclassified from AOCI into income (effective portion)	2,809	$ 3,360
Reclassify net losses on interest rate contracts from AOCI to earnings over the next twelve months	$ 8,000