Acquisitions and Sales of Non-Controlling Interests (Details) (USD $)	9 Months Ended
Sep. 30, 2012 PartnershipUnit Transaction
Acquisitions of Non-Controlling Interests (Additional Textual) [Abstract]
Number of separate transactions to purchase partnership interest	10
Business acquisition, cost of acquired entity	$ 1,314,000
Undistributed earnings	164,000
Remaining purchase price	1,150,000
Future tax benefits	445,000
Aggregate sale price received	239,000
Number of partnerships	3
Related undistributed earnings	$ 5,000
Maximum [Member]
Acquisitions of Non Controlling Interests (Textual) [Abstract]
Purchase interest in partnership	35.00%
Sale interest in partnership	1.00%
Minimum [Member]
Acquisitions of Non Controlling Interests (Textual) [Abstract]
Purchase interest in partnership	10.00%
Sale interest in partnership	64.00%

The total cost of the acquired entity including the cash paid to shareholders of acquired entities, fair value of debt and equity securities issued to shareholders of acquired entities, the fair value of the liabilities assumed, and direct costs of the acquisition.

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 141

-Paragraph 51

-Subparagraph d

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The gross amount of unrecognized tax benefits pertaining to uncertain tax positions taken in tax returns as of the balance sheet date.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Unrecognized Tax Benefit

-URI http://asc.fasb.org/extlink&oid=6527854

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 15A

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=6907707&loc=SL6600010-109319

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name FASB Interpretation (FIN)

-Number 48

-Paragraph 21

-Subparagraph a

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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- Definition

Aggregate sale price received.

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- Definition

Business acquisition cost of acquired entity charge from additional paid up capital.

+ References

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- Definition

Business acquisition cost of acquired entity charge from undistributed earning.

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- Definition

Number of partnerships.

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- Definition

Number of separate transactions to purchase partnership interest.

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- Definition

Purchase interest in partnership.

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- Definition

Related undistributed earnings.

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- Definition

Sale interest in Partnership.

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