Goodwill and Acquired Intangible Assets Estimated Intangible Asset Amortization Expense (Details) $ in Thousands	Jun. 30, 2016 USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months	$ 39,842
Finite-Lived Intangible Assets, Amortization Expense, Year Two	36,239
Finite-Lived Intangible Assets, Amortization Expense, Year Three	29,009
Finite-Lived Intangible Assets, Amortization Expense, Year Four	24,228
Finite-Lived Intangible Assets, Amortization Expense, Year Five	23,092
Total future amortization expense through the next five years	$ 152,410