Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Deferred tax assets, Employee benefits and deferred compensation	$ 1,089	$ 1,745
Deferred tax assets, Investments and asset impairments	1,772	2,619
Deferred tax assets, Other temporary differences	(686)	(807)
Deferred tax assets Net operating loss and capital loss carryforwards	15,643	21,977
Deferred Tax Assets, Gross	17,818	25,534
Valuation allowance	(17,818)	(25,534)
Net deferred tax assets

Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
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-Section 50
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Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible operating loss carryforwards.

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Amount, before allocation of valuation allowance, of deferred tax asset attributable to deductible temporary differences, classified as other.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from compensation and benefits costs.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from estimated impairment losses.

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Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

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