|
Stockholders' Equity and Stock-Based Compensation Repurchase Program (Details) (USD $)
|
3 Months Ended | 6 Months Ended | 9 Months Ended |
|---|---|---|---|
|
Jun. 30, 2014
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Jun. 30, 2014
|
Sep. 30, 2013
|
|
| Employee Stock Purchase Plan [Line Items] | |||
| Stock Repurchase Program, Remaining Authorized Repurchase Amount | $ 118,000,000 | ||
|
Common Class A [Member]
|
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| Employee Stock Purchase Plan [Line Items] | |||
| Stock Repurchase Program, Authorized Amount | 300,000,000 | ||
| Stock Repurchased During Period, Shares | (17,228,792) | (20,304,492) | |
| Stock Repurchased During Period, Value | $ (105,998,000) | $ (135,459,000) |