Debt and Borrowings (Narrative) (Details)	9 Months Ended				9 Months Ended
	Mar. 31, 2015 USD ($)	Jun. 30, 2014 USD ($)	Mar. 31, 2015 Revolving Credit Facility [Member] USD ($)	Jun. 30, 2014 Revolving Credit Facility [Member] USD ($)	Mar. 31, 2015 Revolving Credit Facility [Member] Minimum [Member]	Mar. 31, 2015 Revolving Credit Facility [Member] Maximum [Member]	Mar. 31, 2015 Eurocurrency Rate [Member] Minimum [Member]	Mar. 31, 2015 Eurocurrency Rate [Member] Maximum [Member]	Mar. 31, 2015 Base Rate [Member] Minimum [Member]	Mar. 31, 2015 Base Rate [Member] Maximum [Member]	Mar. 31, 2015 Tilda borrowing arrangement [Member] USD ($)	Mar. 31, 2015 Tilda borrowing arrangement [Member] GBP (£)	Jun. 30, 2014 Tilda borrowing arrangement [Member] USD ($)
Line of Credit Facility [Line Items]
Aggregate principal amount of senior notes	$ 150,000,000
Senior notes term, in years	10
Senior notes maturity date	May 02, 2016
Senior notes interest percentage	5.98%
Senior notes outstanding	150,000,000	150,000,000
Revolving credit facility			1,000,000,000									52,000,000
Line Of Credit Potential Incremental Borrowing Capacity Post-Amendment	350,000,000
Revolving credit facility expiration date	Dec. 12, 2019
Interest coverage ratio	4.0
Leverage ratio	3.5
Consolidated leverage ratio	4.0
Borrowings outstanding under credit agreement			$ 692,443,000	$ 614,502,000							$ 33,391,000		$ 65,975,000
Debt Instrument, Basis Spread on Variable Rate							0.875%	1.70%	0.00%	0.70%
Long-term Debt, Weighted Average Interest Rate			1.69%
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage					0.20%	0.30%
Short-term Debt, Weighted Average Interest Rate											2.80%	2.80%