|
Goodwill and Acquired Intangible Assets, Net (Details) (USD $)
|
3 Months Ended |
|
|
Mar. 31, 2015
|
Dec. 31, 2014
|
| Goodwill and Finite-lived Intangible Assets Rollforward [Roll Forward] |
|
|
| Finite-Lived Intangible Assets, Net |
$ 144,270,000 |
$ 158,267,000 |
| Finite-Lived Intangible Assets, Amortization Expense |
(6,192,000) |
|
| Finite-lived intangible assets, other changes |
(7,805,000) |
|
| Goodwill |
560,747,000 |
599,863,000 |
| Goodwill, Other Changes |
(39,116,000) |
|
| Intangible Assets, Net (Including Goodwill) |
705,017,000 |
758,130,000 |
| Total intangible assets amortization expense |
(6,192,000) |
|
| Total intangible assets, other changes |
(46,921,000) |
|
| Finite-Lived Intangible Assets, Amortization Expense, Remainder of Fiscal Year |
14,300,000 |
|
| Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months |
19,000,000 |
|
| Finite-Lived Intangible Assets, Amortization Expense, Year Two |
17,100,000 |
|
| Finite-Lived Intangible Assets, Amortization Expense, Year Three |
15,000,000 |
|
| Finite-Lived Intangible Assets, Amortization Expense, Year Four |
14,300,000 |
|
| Finite-Lived Intangible Assets, Amortization Expense, Year Five |
$ 13,900,000 |
|