Income Taxes - Deferred Taxes (Details) (USD $)	Dec. 31, 2011	Dec. 31, 2010
Income Tax Contingency [Line Items]
Deferred Tax Liabilities, Deferred Expense	$ 4,000,000	$ 5,100,000
Deferred tax assets	22,260,000	23,189,000
Deferred tax liabilities	(2,054,000)	(1,999,000)
Provision for valuation allowance	(6,479,000)	(5,041,000)
Total	13,727,000	16,149,000
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Impairment Losses	9,700,000	9,000,000
Deferred Tax Assets, Operating Loss Carryforwards	300,000	2,700,000
Deferred Tax Liabilities, Tax Deferred Income	$ 2,000,000	$ 1,700,000

The sum of the tax effects as of the balance sheet date of the amounts of all future tax deductions arising from temporary differences between tax basis and generally accepted accounting principles basis recognition of assets, liabilities, revenues and expenses, which can only be deducted for tax purposes when permitted under enacted tax laws ( before the valuation allowance, if any, to reduce such sum amount to net realizable value). Includes any tax benefit realized in deferred tax assets for significant impacts of tax planning strategies.

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For entities that net deferred tax assets and tax liabilities, represents the unclassified net amount of deferred tax assets and liabilities as of the balance sheet date, which result from applying the applicable enacted tax rate to net temporary differences and carryforwards pertaining to assets or liabilities. A temporary difference is a difference between the tax basis of an asset or liability and its carrying amount in the financial statements prepared in accordance with generally accepted accounting principles that will reverse in ensuing periods.

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- Definition

The sum of the tax effects as of the balance sheet date of the amount of excesses of tax deductions over gross income in a year which cannot be used on the tax returns in the current year but can be carried forward to reduce taxable income or income taxes payable in a future year, for which there must be sufficient tax-basis income to utilize a portion or all of the carryforward amount to realize the deferred tax asset.

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- Definition

The tax effect as of the balance sheet date of the amount of the amount of the estimated future tax deductions arising from estimated impairment losses, which can only be deducted for tax purposes when impaired assets are sold or otherwise disposed of, and which can only be realized if sufficient tax-basis income is generated in future periods to enable the deduction to be taken.

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- Definition

The sum of the portions of deferred tax assets as of the balance sheet date for which, based on the weight of available evidence, it is more likely than not will not be realized through future reductions of tax-based income.

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- Definition

The cumulative amount of all deferred tax liabilities, which result from applying the applicable tax rate to net taxable temporary differences pertaining to each jurisdiction to which the entity is obligated to pay income tax. A taxable temporary difference is a difference between the tax basis and the carrying amount of an asset or liability in the financial statements prepared in accordance with generally accepted accounting principles that will result in taxable amounts in one or more future periods.

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- Definition

The amount as of the balance sheet date of the estimated future tax effects attributable to items expensed for tax purposes but capitalized in conformity with generally accepted accounting principles, which will reverse in future periods when amortization of such capitalized costs cannot be deducted for tax purposes.

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- Definition

The amount as of the balance sheet date of the estimated future tax effects arising from revenue or other income not otherwise listed in the existing taxonomy that is included in accounting income in conformity with generally accepted accounting principles but excluded from tax-basis income, which will increase future taxable income when such income is recognized for tax purposes.

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