Long-Term Debt Summary of Debt (Details) (USD $)	Mar. 31, 2015	Mar. 31, 2014	Jul. 01, 2014	Feb. 13, 2014	Aug. 30, 2013	Jul. 02, 2009
Debt Instrument [Line Items]
Line of credit facility, amount outstanding	$ 658,529,000
Long-term debt, outstanding	1,072,091,000	1,117,588,000
Short-term	330,254,000	212,669,000
Long-term debt current	2,894,000	4,556,000
Long-term debt	738,943,000	900,363,000
Long-term debt, total	741,837,000	904,919,000
Long-term Debt, by Maturity [Abstract]
2016	2,894,000
2017	30,269,000
2018	269,000
2019	269,000
2020	173,000
Later	707,963,000
Unused lines of credit	669,428,000
Senior Secured Credit Facility [Member]
Debt Instrument [Line Items]
Line of credit facility, amount outstanding	210,259,000
Long-term debt, outstanding	0	175,000,000
Debt instrument, interest rate	5.50%
Long-term Debt, by Maturity [Abstract]
2016	0
2017	0
2018	0
2019	0
2020	0
Later	0
Subordinated Debt [Member]
Debt Instrument [Line Items]
Line of credit facility, amount outstanding	0
Long-term debt, outstanding	707,732,000	721,126,000
Long-term Debt, by Maturity [Abstract]
2016	0
2017	0
2018	0
2019	0
2020	0
Later	707,732,000
Subordinated Debt [Member] | 9.875% Senior Secured Second Lien Notes due 2021 [Member]
Debt Instrument [Line Items]
Line of credit facility, amount outstanding	0
Long-term debt, outstanding	707,732,000	721,126,000
Debt instrument, interest rate	9.90%
Long-term Debt, by Maturity [Abstract]
2016	0
2017	0
2018	0
2019	0
2020	0
Later	707,732,000
Convertible Debt [Member]
Long-term Debt, by Maturity [Abstract]
Debt instrument, face amount			1,093,000	55,000,000	115,000,000
Convertible Debt [Member] | 5 1/2% Convertible Senior Subordinated Notes Due 2014 [Member]
Debt Instrument [Line Items]
Line of credit facility, amount outstanding	0
Long-term debt, outstanding	0	1,093,000
Debt instrument, interest rate	5.50%					5.50%
Long-term Debt, by Maturity [Abstract]
2016	0
2017	0
2018	0
2019	0
2020	0
Later	0
Debt instrument, face amount						100,000,000
Foreign Seasonal Debt [Member]
Debt Instrument [Line Items]
Line of credit facility, amount outstanding	0
Long-term debt, outstanding	30,000,000	0
Debt instrument, interest rate	2.70%
Long-term Debt, by Maturity [Abstract]
2016	0
2017	30,000,000
2018	0
2019	0
2020	0
Later	0
Long-term Debt [Member]
Debt Instrument [Line Items]
Line of credit facility, amount outstanding	5,000
Long-term debt, outstanding	4,105,000	7,700,000
Debt instrument, interest rate	7.80%
Long-term Debt, by Maturity [Abstract]
2016	2,894,000
2017	269,000
2018	269,000
2019	269,000
2020	173,000
Later	231,000
Notes Payable to Banks [Member]
Debt Instrument [Line Items]
Line of credit facility, amount outstanding	448,265,000
Long-term debt, outstanding	330,254,000	212,669,000
Debt instrument, interest rate	5.10%
Long-term Debt, by Maturity [Abstract]
2016	0
2017	0
2018	0
2019	0
2020	0
Later	0
Line of Credit [Member]
Debt Instrument [Line Items]
Long-term debt, outstanding	6,328,000	5,273,000
Letter of Credit [Member]
Debt Instrument [Line Items]
Line of credit facility, amount outstanding	10,899,000
Senior Notes [Member] | 9.875% Senior Secured Second Lien Notes due 2021 [Member]
Long-term Debt, by Maturity [Abstract]
Original issue discount	12,268,000
Debt instrument, face amount	$ 720,000,000