Debt and Borrowings (Narrative) (Details)	12 Months Ended					12 Months Ended
	Jun. 30, 2013 USD ($)	Jun. 30, 2012 USD ($)	Jun. 30, 2011 USD ($)	Jun. 30, 2013 Revolving Credit Facility [Member] USD ($)	Jun. 30, 2012 Revolving Credit Facility [Member] USD ($)	Jun. 30, 2013 Revolving Credit Facility [Member] Minimum [Member]	Jun. 30, 2013 Revolving Credit Facility [Member] Maximum [Member]	Jun. 30, 2013 Eurocurrency Rate [Member] Minimum [Member]	Jun. 30, 2013 Eurocurrency Rate [Member] Maximum [Member]	Jun. 30, 2013 Base Rate [Member] Minimum [Member]	Jun. 30, 2013 Base Rate [Member] Maximum [Member]	Jun. 30, 2013 Foreign Line of Credit [Member] USD ($)	Jun. 30, 2013 Foreign Line of Credit [Member] GBP (£)	Jun. 30, 2012 Foreign Line of Credit [Member] USD ($)
Debt Disclosure [Abstract]
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 expiration date	Aug. 31, 2017
Interest coverage ratio	4.0
Leverage ratio	3.5
Consolidated leverage ratio	4.0
Line Of Credit Potential Incremental Borrowing Capacity Post-Amendment	150,000,000
Interest Paid	19,154,000	14,377,000	11,004,000
Line of Credit Facility [Line Items]
Borrowings outstanding under credit agreement				503,384,000	240,000,000							11,779,000		0
Revolving credit facility				$ 850,000,000									£ 10,000,000
Debt Instrument, Basis Spread on Variable Rate								0.875%	2.00%	0.00%	1.00%
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage						0.20%	0.35%