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Subsequent Event Subsequent Event	6 Months Ended
Subsequent Event Subsequent Event	Sep. 30, 2013
Subsequent Events [Abstract]
Subsequent Events	SUBSEQUENT EVENTS Repayment of Medium Term Notes and Completion of New Bank Term Loan Agreement On October 15, 2013, the Company repaid at maturity $200 million principal amount of 5.2% medium term notes. Subsequently, on October 28, 2013, the Company entered into a $175 million senior term loan agreement with a group of banks. The loan is unsecured, matures in five years, and provides for incremental term loans in an amount up to $75 million at the Company's option, subject to customary conditions. Loans outstanding under the agreement currently bear interest at LIBOR plus 1.50% (1.69% on October 28, 2013) and may be prepaid at any time without premium or penalty. The financial covenants under the new facility are substantially similar to those of the Company's committed revolving credit facility, which require a minimum level of tangible net worth and contain limits on debt levels.