Notes Payable and Long-Term Debt (Details)					1 Months Ended	12 Months Ended		12 Months Ended			12 Months Ended																1 Months Ended				1 Months Ended	12 Months Ended
	Mar. 31, 2015 USD ($)	Mar. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)	Aug. 31, 2012 USD ($)	Aug. 31, 2012 Credit Agreement USD ($)	Mar. 31, 2015 Credit Agreement	Nov. 30, 2014 Credit Agreement USD ($)	Mar. 31, 2015 Credit Agreement Minimum	Mar. 31, 2015 Credit Agreement Maximum USD ($)	Mar. 31, 2015 Credit Agreement LIBOR based interest rates	Mar. 31, 2015 Credit Agreement LIBOR based interest rates First 30 days	Mar. 31, 2015 Credit Agreement LIBOR based interest rates Thereafter	Mar. 31, 2015 Credit Agreement LIBOR based interest rates Thereafter Minimum	Mar. 31, 2015 Credit Agreement LIBOR based interest rates Thereafter Maximum	Mar. 31, 2015 Credit Agreement Alternate Base Rate based interest rates First 30 days	Mar. 31, 2015 Credit Agreement Alternate Base Rate based interest rates Thereafter	Aug. 31, 2013 China Credit Agreement	Jun. 30, 2014 China Credit Agreement Maximum USD ($)	Jun. 30, 2014 China Credit Agreement Maximum CNY	Mar. 31, 2014 China Credit Agreement Maximum USD ($)	Mar. 31, 2014 China Credit Agreement Maximum CNY	Dec. 31, 2013 China Credit Agreement Maximum USD ($)	Dec. 31, 2013 China Credit Agreement Maximum CNY	Sep. 30, 2013 China Credit Agreement Maximum USD ($)	Sep. 30, 2013 China Credit Agreement Maximum CNY	Mar. 31, 2015 Amended China Credit Agreement USD ($)	Oct. 30, 2014 Amended China Credit Agreement Minimum	Oct. 30, 2014 Amended China Credit Agreement Maximum	Mar. 31, 2015 Line of Credit Revolving Credit Facility Credit Agreement USD ($)	Mar. 31, 2015 Line of Credit Revolving Credit Facility Amended China Credit Agreement	Jul. 31, 2014 Mortgages USD ($)	Mar. 31, 2015 Mortgages USD ($)
Notes Payable and Long-Term Debt
Term of agreement (in years)					5 years
Current borrowing capacity					$ 400,000,000																		60,000,000
Debt Instrument, Term																											12 months	18 months				15 years
Maximum available for the issuance of letters of credit					75,000,000
Maximum available for swing loans					5,000,000
Additional available credit					200,000,000
Maximum borrowing capacity with contingent increase				600,000,000
Capacity available for currency borrowings				150,000,000
Period of variable interest rate basis (in days)						30 days
Adjusted LIBOR rate at period end (as a percent)										0.18%
Spread on variable interest rate (as a percent)						1.00%					1.25%		1.25%	2.00%	0.25%	0.25%
Variable interest rate basis												LIBOR
Fees on the daily unused amount (as a percent)						0.175%		0.175%	0.30%
Additional Financial Covenants Required
Asset coverage ratio, numerator, to be maintained under Credit Agreement covenants								3.25
Ratio of consolidated EBITDA plus annual rental expense to annual interest expense plus annual rental expense, numerator, to be maintained under Credit Agreement covenants								2.25
Debt Instrument, Covenant Capital Expenditures Allowed									110,000,000
Total adjusted leverage ratio, numerator, to allow for maximum limit on acquisitions under terms of the Credit Agreement covenants						2.75			2.75
Additional unsecured debt allowed under Credit Agreement covenants									200,000,000
Outstanding letters of credit																													100,000
Amount available under the Credit Agreement																													399,900,000
Deferred financing costs					1,800,000		800,000
Debt Instrument Covenant Borrowings Allowed in Third and Fourth Quarters of Fiscal Year																						10,000,000	60,000,000	10,000,000	60,000,000
Debt Instrument Covenant Borrowings Allowed in First and Second Quarters of Fiscal Year																		3,300,000	20,000,000	3,300,000	20,000,000
Debt Instrument Covenant Percentage of Facility Amount in United States Dollars Guaranteed																	110.00%
Outstanding borrowings																										4,900,000
Debt Instrument, Interest Rate, Effective Percentage																														5.35%	4.928%
Debt Instrument, Face Amount																															33,900,000
Long-term Debt, Gross																																33,600,000
Short-term borrowings	5,383,000	6,702,000	9,728,000																													500,000
Mortgage payable	33,154,000	0	0																													33,100,000
Debt Instrument, Amortization Period																															30 years
Debt Instrument, Term for Minimum Payments																															5 years
Debt Instrument, Periodic Payment Terms, Balloon Payment to be Paid																															23,400,000
Debt Instrument, Annual Principal Payment																															$ 2,700,000