Short-Term Borrowings and Long-Term Debt (Narrative) (Details)				3 Months Ended		3 Months Ended						3 Months Ended			3 Months Ended		6 Months Ended	3 Months Ended				3 Months Ended
	Sep. 30, 2014 USD ($)	Sep. 30, 2014 Multi-Currency Revolving Credit Facility [Member] USD ($)	Sep. 30, 2013 Multi-Currency Revolving Credit Facility [Member] USD ($)	Sep. 30, 2014 Industrial Development Revenue Bond [Member] USD ($)	Jun. 30, 2014 Industrial Development Revenue Bond [Member] USD ($)	Sep. 30, 2014 Foreign Line of Credit [Member] EUR (€)	Sep. 30, 2014 Foreign Line of Credit [Member] Minimum [Member]	Sep. 30, 2014 Foreign Line of Credit [Member] Maximum [Member] EUR (€)	Sep. 30, 2014 Multi-Currency Invoice Discounting Credit Facility [Member] USD ($)	Sep. 30, 2014 Multi-Currency Invoice Discounting Credit Facility [Member] EUR (€)	Sep. 30, 2014 Multi-Currency Invoice Discounting Credit Facility [Member] GBP (£)	Sep. 30, 2014 multi-currency invoice discounting credit facility [Domain]	Sep. 30, 2014 Multi-Currency Revolving Credit Facility, Combined with Accordion Feature [Member] USD ($)	Sep. 30, 2014 Multi-Currency Revolving Credit Facility, Accordion Feature [Member] USD ($)	Sep. 30, 2014 Multi-Currency Revolving Credit Facility [Member] USD ($) quarter	Sep. 30, 2013 Multi-Currency Revolving Credit Facility [Member] USD ($)	Dec. 31, 2013 Multi-Currency Revolving Credit Facility [Member] USD ($)	Sep. 30, 2014 Multi-Currency Revolving Credit Facility [Member] Amended Credit Agreement [Member]	Sep. 30, 2014 Multi-Currency Revolving Credit Facility [Member] Minimum [Member]	Sep. 30, 2014 Multi-Currency Revolving Credit Facility [Member] Maximum [Member]	Sep. 30, 2014 Letter of Credit [Member] Maximum [Member] USD ($)	Sep. 30, 2014 Alternate Base Rate Loans [Member] Multi-Currency Revolving Credit Facility [Member]	Sep. 30, 2014 Alternate Base Rate Loans [Member] Multi-Currency Revolving Credit Facility [Member] Minimum [Member]	Sep. 30, 2014 Alternate Base Rate Loans [Member] Multi-Currency Revolving Credit Facility [Member] Maximum [Member]	Sep. 30, 2014 London Interbank Offered Rate (LIBOR) [Member] Multi-Currency Revolving Credit Facility [Member]	Sep. 30, 2014 London Interbank Offered Rate (LIBOR) [Member] Multi-Currency Revolving Credit Facility [Member] Minimum [Member]	Sep. 30, 2014 London Interbank Offered Rate (LIBOR) [Member] Multi-Currency Revolving Credit Facility [Member] Maximum [Member]
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate				1.01%	1.00%
Borrowing capacity under credit facility						€ 6,000,000			$ 700,000	€ 4,100,000	£ 4,100,000		$ 450,000,000	$ 150,000,000	$ 300,000,000						$ 50,000,000
Debt issuance costs incurred																	500,000
Percentage spread points on variable rate debt instrument				0.85%		1.25%	1.25%	2.00%				1.85%										0.00%	0.00%	1.25%	1.00%	1.00%	2.25%
Line of Credit Facility, Commitment Fee Amount									100,000
Line of credit facility, unused capacity, commitment fee percentage							0.10%	0.275%							0.175%				0.175%	0.40%
Line of credit facility, unused capacity, threshold for commitment fees								3,000,000.0
Line of credit facility, maximum borrowing capacity, percentage									85.00%
Debt issuance costs	1,300,000
Maturity of credit facility															Oct. 11, 2016			Nov. 06, 2018
Amendment date of credit facility															Nov. 06, 2013
Number of quarters in measurement period (in number of quarters)															4
Percentage of capital stock or other equity interest pledged per credit agreement															65.00%
Average daily balance on revolving credit facility															0	0
Line of Credit Facility, Remaining Borrowing Capacity		300,000,000	300,000,000
Debt Instrument, Issuance Date				Aug. 01, 2007
Maturity date of debt instrument				Sep. 01, 2032
Maximum time period of interest (in years)				10 years
Percentage of principal due on exercise of put option				100.00%
Put option, redemption percentage				$ 5,400,000	$ 5,400,000
Put option, exercisable period limitation				180 days
Put option, anniversary period				5 years