Long-term Debt Redemption Percentages for Future Periods (Details)	6 Months Ended
Jun. 30, 2014
2015 [Member]
Debt Instrument Redemption [Line Items]
Notes redemption percentages	104.062%
2016 [Member]
Debt Instrument Redemption [Line Items]
Notes redemption percentages	102.031%
2017 and thereafter [Member]
Debt Instrument Redemption [Line Items]
Notes redemption percentages	100.00%

Percentage price of original principal amount of debt at which debt can be redeemed by the issuer.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 470

-Section 50

-Paragraph 3

-Subparagraph e

-URI http://asc.fasb.org/extlink&oid=6479336&loc=d3e64711-112823

Name:	us-gaap_DebtInstrumentRedemptionPricePercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration