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Noncontrolling Interest (Details Textual) (USD $)	6 Months Ended	12 Months Ended
	Jun. 30, 2014	Dec. 31, 2007
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	87.60%
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%
Common Class B [Member]
Noncontrolling Interest [Line Items]
Membership Units To Be Issued	897,903

X

- Definition

Price per share of initial public offering during the period.

+ References

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- Definition

Number of LLC membership units to be issued to the affiliates of investors.

+ References

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- Definition

The percentage of owned subsidiaries membership units during the period.

+ References

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+ Details

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X

- Definition

The percentage of payment for exchanging LIC member in cash savings under tax benefit sharing agreement.

+ References

No definition available.

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- Definition

The remaining percentage of payment for exchanging LIC member in cash savings under tax benefit sharing agreement.

+ References

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- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 323

-SubTopic 10

-Section 50

-Paragraph 3

-Subparagraph (a)(1)

-URI http://asc.fasb.org/extlink&oid=6382943&loc=d3e33918-111571

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