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Intangible Assets - Summary of intangible Assets (Details) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2013
Jun. 30, 2013
Intangible Assets [Abstract]    
Customer contracts and related customer relationships $ 351,908 $ 351,349
Acquired technologies 27,177 27,177
Covenants not to compete 3,435 3,401
Other 1,586 1,639
Intangible assets 384,106 383,566
Less accumulated amortization (286,425) (279,378)
Total intangible assets, net $ 97,681 $ 104,188