SCHEDULE II-VALUATION AND QUALIFYING ACCOUNTS (Details) (Allowance for Doubtful Accounts, USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2011
Allowance for Doubtful Accounts
VALUATION AND QUALIFYING ACCOUNTS
Balance at Beginning of Year	$ 3,246	$ 3,657	$ 4,348
Amount Charged to Expense	1,384	970	102
Utilization of Reserve (Net of Recoveries)	(1,307)	(1,381)	(793)
Balance at End of Year	$ 3,323	$ 3,246	$ 3,657