Long-Term Debt Outstanding Revolving Loans (Details) - Revolving credit facility [Member] € in Thousands, £ in Thousands, CAD in Thousands, $ in Thousands	Sep. 30, 2016 EUR (€)	Sep. 30, 2016 GBP (£)	Sep. 30, 2016 CAD	Sep. 30, 2016 USD ($)
British pound (swingline loan) [Member]
Line of Credit Facility [Line Items]
Long-term Debt, Gross		£ 2,000		$ 2,594
Debt Instrument, Interest Rate, Stated Percentage	2.48%	2.48%	2.48%	2.48%
British pound revolving loan [Member]
Line of Credit Facility [Line Items]
Long-term Debt, Gross		£ 37,000		$ 47,993
Debt Instrument, Interest Rate, Stated Percentage	2.27%	2.27%	2.27%	2.27%
Canadian dollar revolving loan [Member]
Line of Credit Facility [Line Items]
Long-term Debt, Gross			CAD 13,500	$ 10,292
Debt Instrument, Interest Rate, Stated Percentage	2.87%	2.87%	2.87%	2.87%
Euro revolving loan [Member]
Line of Credit Facility [Line Items]
Long-term Debt, Gross	€ 21,100			$ 23,691
Debt Instrument, Interest Rate, Stated Percentage	2.00%	2.00%	2.00%	2.00%