| Non-Controlling Interest (Details) (USD $) | 12 Months Ended | 
|---|---|
| Dec. 31, 2014 | |
| Noncontrolling Interest [Line Items] | |
| Noncontrolling Interest, Ownership Percentage by Parent | 60.00%us-gaap_MinorityInterestOwnershipPercentageByParent | 
| Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners | 40.00%us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners | 
| Non-controlling Interest [Member] | |
| Noncontrolling Interest [Line Items] | |
| Payments to Acquire Interest in Joint Venture | $ 8,000,000us-gaap_PaymentsToAcquireInterestInJointVenture / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember | 
| Parent [Member] | |
| Noncontrolling Interest [Line Items] | |
| Payments to Acquire Interest in Joint Venture | $ 12,000,000us-gaap_PaymentsToAcquireInterestInJointVenture / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember | 
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- Definition The equity interest of noncontrolling shareholders, partners or other equity holders in consolidated entity. No definition available. 
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- Definition The parent entity's interest in net assets of the subsidiary, expressed as a percentage. No definition available. 
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- Definition The cash outflow associated with the investment in or advances to an entity in which the reporting entity shares control of the entity with another party or group. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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