Short-Term Borrowings and Long-Term Debt Schedule of Accreted Value of Long-term Debt (Details 1) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2014 5.5% senior notes	Mar. 31, 2013 5.5% senior notes	May 21, 2012 5.5% senior notes	Mar. 31, 2014 5.625% senior notes	Jan. 30, 2014 5.625% senior notes	Mar. 31, 2013 5.625% senior notes	Mar. 31, 2014 Five-year term loan [Member]	Mar. 31, 2013 Five-year term loan [Member]	Mar. 31, 2014 Other term loans	Mar. 31, 2013 Other term loans	Mar. 31, 2014 Long-term Debt [Member]	Mar. 31, 2013 Long-term Debt [Member]
Debt Instrument
Long-term Debt, Gross	$ 1,050,438		$ 650,000		$ 650,000	$ 400,000	$ 400,000		$ 0		$ 438
Debt Instrument, Unamortized Discount			4,958			6,216			0		0		11,174
Debt Instrument, Noncurrent Carrying Amount													1,050,000
Long-term Debt, including current portion	1,039,264	1,144,954	645,042	644,077		393,784		0	0	500,000	438	877
Long-term Debt, Current Maturities	438	50,438
Long-term Debt, Excluding Current Maturities													1,038,826	1,094,516
Debt Instrument Maturity Amount, Current	438
Debt Instrument, Unamortized Discount (Premium), Net	$ 11,174				$ 6,754		$ 6,260