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v2.4.1.9

Investments in and Advances to Affiliates Ownership percentages (Details) (USD $) In Millions, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Noncontrolling Interest, Ownership Percentage by Parent | 50.00%us-gaap_MinorityInterestOwnershipPercentageByParent |  |
Gain on sale of joint venture | $ 0 us-gaap_GainLossOnSaleOfStockInSubsidiaryOrEquityMethodInvestee | $ 1.2 us-gaap_GainLossOnSaleOfStockInSubsidiaryOrEquityMethodInvestee | $ 0 us-gaap_GainLossOnSaleOfStockInSubsidiaryOrEquityMethodInvestee

X
- Definition Amount of gain (loss) on sale or disposal of equity in securities of subsidiaries or equity method investee. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 13 -Subparagraph g -Article 9 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.13(g)) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 + Details
Name: | us-gaap_GainLossOnSaleOfStockInSubsidiaryOrEquityMethodInvestee
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition The parent entity's interest in net assets of the subsidiary, expressed as a percentage. + References No definition available. + Details
Name: | us-gaap_MinorityInterestOwnershipPercentageByParent
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant