Credit Agreement (Narrative) (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended	1 Months Ended
	Dec. 31, 2014	Nov. 30, 2014	Oct. 30, 2014	Mar. 31, 2014	Jul. 31, 2014	Nov. 13, 2014	Aug. 31, 2013
Notes Payable and Long-Term Debt
Short-term borrowings	$ 5,367			$ 6,702
Mortgage payable	33,282			0
Mortgage
Notes Payable and Long-Term Debt
Debt Instrument, Term for Minimum Payments	5 years
Effective interest rate on debt	4.928%
Debt Instrument, Face Amount					33,900
Gross amount of mortgage	33,800
Loan amortization period	30 years
Debt Instrument, Periodic Payment	2,700
Term of mortgage loan	15 years
Debt Instrument, Periodic Payment Terms, Balloon Payment to be Paid	23,400
Short-term borrowings	500
Mortgage payable	33,282
Second Amended and Restated Credit Agreement
Notes Payable and Long-Term Debt
Line of Credit Facility Term		5 years
Current borrowing capacity						400,000
Line of Credit Facility, Capacity Available for Letters of Credit, Maximum						75,000
Line of Credit Facility Capacity Available for Swing Loans, Maximum						5,000
Line of Credit Facility Borrowing Capacity Increase Available						200,000
Line of Credit Facility, Maximum Borrowing Capacity						600,000
Line of Credit Facility Capacity Available for Foreign Currency, Maximum						150,000
Debt Instrument Period of Initial Variable Rate	30 days
Debt Instrument, Basis Spread on Variable Rate	1.00%
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage	0.175%
Debt Instrument Covenant Total Adjusted Leverage Ratio, Numerator	2.75
Outstanding borrowings	0
Deferred Finance Costs, Gross		800
Credit Agreement
Notes Payable and Long-Term Debt
Deferred Finance Costs, Gross							1,700
Revolving Credit Facility | Second Amended and Restated Credit Agreement | Line of Credit
Notes Payable and Long-Term Debt
Outstanding letters of credit	100
Line of Credit Facility, Remaining Borrowing Capacity	399,900
Revolving Credit Facility | Amended China Credit Agreement | Line of Credit
Notes Payable and Long-Term Debt
Outstanding borrowings	4,900
Effective interest rate on debt	5.60%
Minimum | Second Amended and Restated Credit Agreement
Notes Payable and Long-Term Debt
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage	0.175%
Debt covenant ratio for earnings, EBITDA, and annual rental expense	2.25
Minimum | Amended China Credit Agreement
Notes Payable and Long-Term Debt
Term of mortgage loan			12 months
Maximum | Second Amended and Restated Credit Agreement
Notes Payable and Long-Term Debt
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage	0.30%
Debt Instrument, Covenant Total Adjusted Leverage Ratio, Numerator for Credit Agreement	3.25
Debt Instrument, Covenant Capital Expenditures Allowed	110,000
Debt Instrument, Covenant Additional Unsecured Debt Allowed	$ 200,000
Maximum | Amended China Credit Agreement
Notes Payable and Long-Term Debt
Term of mortgage loan			18 months
London Interbank Offered Rate (LIBOR) | Second Amended and Restated Credit Agreement
Notes Payable and Long-Term Debt
Adjusted LIBOR Interest Rate at Period End	0.17%
London Interbank Offered Rate (LIBOR) | Debt Instrument Variable Interest Rate First 30 Days | Second Amended and Restated Credit Agreement
Notes Payable and Long-Term Debt
Debt Instrument, Basis Spread on Variable Rate	1.25%
London Interbank Offered Rate (LIBOR) | Debt Instrument Variable Interest Rate Thereafter Days | Second Amended and Restated Credit Agreement
Notes Payable and Long-Term Debt
Debt Instrument, Description of Variable Rate Basis	LIBOR
London Interbank Offered Rate (LIBOR) | Debt Instrument Variable Interest Rate Thereafter Days | Minimum | Second Amended and Restated Credit Agreement
Notes Payable and Long-Term Debt
Debt Instrument, Basis Spread on Variable Rate	1.25%
London Interbank Offered Rate (LIBOR) | Debt Instrument Variable Interest Rate Thereafter Days | Maximum | Second Amended and Restated Credit Agreement
Notes Payable and Long-Term Debt
Debt Instrument, Basis Spread on Variable Rate	2.00%
Debt Instrument Alternate Variable Rate Base | Debt Instrument Variable Interest Rate First 30 Days | Second Amended and Restated Credit Agreement
Notes Payable and Long-Term Debt
Debt Instrument, Basis Spread on Variable Rate	0.25%
Debt Instrument Alternate Variable Rate Base | Debt Instrument Variable Interest Rate Thereafter Days | Second Amended and Restated Credit Agreement
Notes Payable and Long-Term Debt
Debt Instrument, Basis Spread on Variable Rate	0.25%