Debt (Details) (USD $)	3 Months Ended		9 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Mar. 31, 2013
Debt [Abstract]
Credit facility, maximum borrowing capacity	$ 300,000,000		$ 300,000,000
Credit facility, expiration date			Mar. 21, 2017
Credit facility, permitted increase in maximum borrowing capacity	200,000,000		200,000,000
Amount outstanding under the amended credit facility	0		0		18,000,000
Stock repurchase limit	50,000,000		50,000,000
Base rate percentage of borrowings under the credit facility bear interest			the base rate (the greatest of the prime rate, the federal funds effective rate plus one percent, or the daily LIBOR rate plus one percent) or the Eurodollar rate, at the Company’s option, plus the applicable margin (which is based on the level of maximum total debt to EBITDA ratio).
Interest and fees related to the credit facility	273,000	487,000	769,000	1,400,000
Cash paid for interest amounts	$ 286,000	$ 471,000	$ 833,000	$ 1,400,000