Long-Term Debt Outstanding Revolving Loans (Details) - Revolving credit facility [Member] € in Thousands, £ in Thousands, CAD in Thousands, $ in Thousands	Jun. 30, 2017 EUR (€)	Jun. 30, 2017 GBP (£)	Jun. 30, 2017 USD ($)	Jun. 30, 2017 CAD
British Pound (Swingline Loan) [Member]
Line of Credit Facility [Line Items]
Long-term Debt, Gross		£ 4,000	$ 5,203
Debt Instrument, Interest Rate, Stated Percentage	1.97%	1.97%	1.97%	1.97%
British Pound Revolving Loan [Member]
Line of Credit Facility [Line Items]
Long-term Debt, Gross		£ 135,000	$ 175,595
Debt Instrument, Interest Rate, Stated Percentage	2.00%	2.00%	2.00%	2.00%
Canadian Dollar Revolving Loan [Member]
Line of Credit Facility [Line Items]
Long-term Debt, Gross			$ 5,774	CAD 7,500
Debt Instrument, Interest Rate, Stated Percentage	2.66%	2.66%	2.66%	2.66%
Euro Revolving Loan [Member]
Line of Credit Facility [Line Items]
Long-term Debt, Gross	€ 31,150		$ 35,551
Debt Instrument, Interest Rate, Stated Percentage	1.75%	1.75%	1.75%	1.75%