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Related Party Transactions (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012 Board of Directors [Member]	Apr. 30, 2012 Board of Directors [Member]	Dec. 31, 2011 Board of Directors [Member]
Related Party Transactions (Textual) [Abstract]
Treasury stock	$ 36,113,000	$ 31,120,000	$ 0	$ 1,130,000	$ 0
Treasury stock, shares	1,325,837	1,134,528		45,179
Related Party Transactions (Additional Textual) [Abstract]
Repurchase interests of partners and trust unit holders	149,000	221,000
Accrued interest owed to a private lender		787,000
Credit agreement provided loan	$ 20,000,000
Interest rate for loan	10.00%

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- Definition

Repurchase interests of partners and trust unit holders.

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Carrying value as of the balance sheet date of [accrued] interest payable on all forms of debt, including trade payables, that has been incurred and is unpaid. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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-Publisher AICPA

-Name Accounting Research Bulletin (ARB)

-Number 43

-Section A

-Paragraph 7

-Chapter 3

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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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-Glossary Current Liabilities

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The interest rate applicable to the portion of the carrying amount of long-term borrowings outstanding as of the balance sheet date, including current maturities, which accrues interest at a set, unchanging rate.

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Including the current and noncurrent portions, carrying value as of the balance sheet date of subordinated debt (with initial maturities beyond one year or beyond the operating cycle if longer). Subordinated debt places a lender in a lien position behind debt having a higher priority of repayment in liquidation of the entity's assets.

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-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 10

-Section F



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Number of common and preferred shares that were previously issued and that were repurchased by the issuing entity and held in treasury on the financial statement date. This stock has no voting rights and receives no dividends.

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The amount allocated to treasury stock. Treasury stock is common and preferred shares of an entity that were issued, repurchased by the entity, and are held in its treasury.

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