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Subsequent Event (Details) (Subsequent Event, USD $) In Millions, unless otherwise specified | 0 Months Ended
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Apr. 24, 2013
Subsequent Event |
Subsequent Event [Line Items] |
Stock Repurchase Program, Authorized Amount | $ 100

X
- Definition The amount authorized by an entity's Board of Directors under a stock repurchase plan. + References No definition available. + Details
Name: | us-gaap_StockRepurchaseProgramAuthorizedAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Details
Name: | us-gaap_SubsequentEventLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration