Debt (Narratives) (Details) (USD $)	9 Months Ended
	Dec. 31, 2012	Dec. 31, 2009
Line of Credit Facility [Line Items]
Line of Credit Facility, Expiration Date	October 31, 2017
Line of Credit Facility, Maximum Borrowing Capacity	$ 75,000,000
Line of Credit, Unused Borrowing Capacity, Amount	88,530,000
Line of Credit Facility, Amount Outstanding	0
Letters of Credit Outstanding, Amount	11,470,000
Revolving credit facility secured by Non US Subsidiary Stock	65.00%
Fixed Charge Coverage Ratio Minimum	1.25
Maximum total leverage ratio	3.50
Annual capital expenditures, excluding capital expenditures for a global ERP system	30,000,000
Letters of credit issuance period prior to the expiry date of the Revolving Credit Facility	5
Letters of credit issuance period after the expiry date of the Revolving Credit Facility	1
Debt Instrument, Interest Rate, Stated Percentage	7.875%
Debt Instrument, Issuance Date	January 25, 2011
New Senior Subordinated note issued	150,000,000
Debt instrument issued at Discount rate percent	98.545%
Repurchase of notes at premium, percent	101.00%
Carrying amount of the Company's revolving credit facility	150,000,000
Debt Instrument, Fair Value Disclosure	156,000,000
Unsecured Debt	8,126,000
Line of Credit Facility, Average Outstanding Amount	0
Secured Debt	963,000
Proceeds from Secured Lines of Credit	0
February One Two Thousand Fourteen [Member]
Line of Credit Facility [Line Items]
Redemption of outstanding notes percent maximum	35.00%
Redemption Price Of Outstanding Notes Percent	107.875%
February One Two Thousand Fifteen [Member]
Line of Credit Facility [Line Items]
Redemption Price Of Outstanding Notes Percent	103.938%
February One Two Thousand Sixteen [Member]
Line of Credit Facility [Line Items]
Redemption Price Of Outstanding Notes Percent	101.969%
February One Two Thousand Seventeen [Member]
Line of Credit Facility [Line Items]
Redemption Price Of Outstanding Notes Percent	100.00%
New Debt [Member]
Line of Credit Facility [Line Items]
Line Of Credit Facility Maximum Borrowing Capacity	100,000,000
Letter of Credit [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Remaining Borrowing Capacity	0
General Lien Basket [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Remaining Borrowing Capacity	0
Standby Letters of Credit [Member]
Line of Credit Facility [Line Items]
Letters of Credit Outstanding, Amount	9,108,000
Financial Standby Letter of Credit [Member]
Line of Credit Facility [Line Items]
Letters of Credit Outstanding, Amount	2,362,000
Maximum [Member]
Line of Credit Facility [Line Items]
Line Of Credit Facility Maximum Borrowing Capacity		100,000,000
LIBOR	1.00%
Payments for (Proceeds from) Short-term Investments	30,000,000
Maximum [Member] | New Debt [Member]
Line of Credit Facility [Line Items]
Line Of Credit Facility Maximum Borrowing Capacity	75,000,000
Maximum [Member] | General Investments Basket [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Remaining Borrowing Capacity	0
Minimum [Member]
Line of Credit Facility [Line Items]
LIBOR	0.00%
Payments for (Proceeds from) Short-term Investments	20,000,000
Minimum [Member] | General Investments Basket [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Remaining Borrowing Capacity	$ 0