Long-term Debt - Debt Instrument Redemption Percentages (Details) - Senior Notes [Member]	May. 15, 2015
2015 [Member]
Debt Instrument [Line Items]
Redemption price percentages	104.063%
2016 [Member]
Debt Instrument [Line Items]
Redemption price percentages	102.031%
2017 and thereafter [Member]
Debt Instrument [Line Items]
Redemption price 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