Goodwill and Acquired Intangible Assets Intangible Assets (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Mar. 31, 2015
Mar. 31, 2014
Goodwill and Acquired Intangible Assets Intangible Assets [Abstract]        
Intangible assets amortization expense $ 4,719 $ 2,228 $ 16,803 $ 6,885