Commitments and Contingencies Operating Leases Rent Expense (Details 4) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2012
Commitments and Contingencies Disclosure [Abstract]
Operating Leases, Rent Expense, Minimum Rentals	$ 130,880	$ 138,488	$ 140,285
Operating Leases, Rent Expense, Sublease Rentals	16,289	14,750	14,310
Operating Leases, Rent Expense, Net	$ 114,591	$ 123,738	$ 125,975