Derivatives (Narratives) (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Interest Rate Derivatives [Abstract]
Total notional amount of Company's variable interest rate swaps on debt	$ 319,900
Notional amount of operating lease	10,500
Reclassify net losses on interest rate contracts from AOCI to earnings over the next twelve months	12,300
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax	2,089	$ 834
Loss reclassified from AOCI into income (effective portion)	$ 3,360	$ 3,647