Long-Term Debt Outstanding Revolving Loans (Details) - Revolving credit facility [Member] € in Thousands, £ in Thousands, CAD in Thousands, $ in Thousands	Mar. 31, 2017 EUR (€)	Mar. 31, 2017 GBP (£)	Mar. 31, 2017 USD ($)	Mar. 31, 2017 CAD
British Pound (Swingline Loan) [Member]
Line of Credit Facility [Line Items]
Long-term Debt, Gross		£ 11,000	$ 13,796
Debt Instrument, Interest Rate, Stated Percentage	2.22%	2.22%	2.22%	2.22%
British Pound Revolving Loan [Member]
Line of Credit Facility [Line Items]
Long-term Debt, Gross		£ 37,000	$ 46,405
Debt Instrument, Interest Rate, Stated Percentage	2.26%	2.26%	2.26%	2.26%
Canadian Dollar Revolving Loan [Member]
Line of Credit Facility [Line Items]
Long-term Debt, Gross			$ 6,014	CAD 8,000
Debt Instrument, Interest Rate, Stated Percentage	2.89%	2.89%	2.89%	2.89%
Euro Revolving Loan [Member]
Line of Credit Facility [Line Items]
Long-term Debt, Gross	€ 28,600		$ 30,593
Debt Instrument, Interest Rate, Stated Percentage	2.00%	2.00%	2.00%	2.00%