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Convertible Notes, Long-Term Debt and Credit Facility - Convertible Notes (Details) (2008 Notes [Member], USD $) In Millions, unless otherwise specified | Feb. 15, 2013
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2008 Notes [Member] |
Debt Instrument [Line Items] |
Notes repurchased | $ 5.2

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

X
- Definition Face (par) amount of the original debt instrument that was repurchased. + References No definition available. + Details
Name: | us-gaap_DebtInstrumentRepurchasedFaceAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant