Noncontrolling Interest (Details Textual) (USD $)
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12 Months Ended | |
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Dec. 31, 2013
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Dec. 31, 2007
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Noncontrolling Interest [Line Items] | ||
Initial Public Offering Price Per Share | $ 210.00 | |
Equity Method Investment, Ownership Percentage | 28.90% | |
Percentage Of Owned Of Subsidiaries Membership Units | 87.30% | |
Percentage Of Payment To Exchanging Llc Member In Cash Savings Under Tax Benefit Sharing Agreement | 85.00% | |
Remaining Percentage Of Payment To Exchanging Llc Member In Cash Savings Under Tax Benefit Sharing Agreement | 15.00% | |
Greenlight [Member]
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Noncontrolling Interest [Line Items] | ||
Membership Units To Be Issued | 69,382 | |
Thirdpoint [Member]
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Noncontrolling Interest [Line Items] | ||
Membership Units To Be Issued | 34,691 | |
Common Class B [Member]
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Noncontrolling Interest [Line Items] | ||
Membership Units To Be Issued | 897,903 |