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Acquisitions (Summary Of Actual And Pro Forma Revenue And Net Income) (Details) (USD $)
 3 Months Ended 6 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2011
Dec. 31, 2011
Dec. 31, 2010
Business Acquisition [Line Items]          
Total special charges $ 5,221,000 $ 3,461,000   $ 12,326,000 $ 6,656,000
Global 360 Holding Corporation [Member]
          
Business Acquisition [Line Items]          
Actual revenue 19,918,000     38,213,000  
Actual net loss (1,158,000) [1]     (5,035,000) [1]  
Pro forma revenue    292,960,000   611,838,000 533,139,000
Pro forma net income    [2] 35,168,000 [2]   77,847,000 [2] 54,033,000 [2]
Amortization charges 5,100,000   9,500,000    
Total special charges $ 400,000   $ 3,800,000    
[1] Included within net loss for the period from October 1, 2011 to December 31, 2011 are $5.1 million of amortization charges relating to the allocated values of intangible assets and $0.4 million of restructuring charges included within Special charges (note 16). Included within net loss for the period from July 13, 2011 to December 31, 2011 are $9.5 million of amortization charges relating to the allocated values of intangible assets and $3.8 million of restructuring charges included within Special charges (note 16).
[2] Included in pro forma net income are estimated amortization charges relating to the allocated values of intangible assets for all the periods reported above.