Income Taxes (Narrative) (Details) (USD $)	3 Months Ended	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Taxes [Line Items]
Deferred Tax Benefit Expense Valuation Allowance Adj Capital Loss Carryforwards	$ 4,800,000	$ 4,900,000
Deferred Tax Benefit Expense Unremitted Earnings FCTA		2,200,000
Deferred Tax Expense Benefit Unremitted Earnings FCTA Out of Period Adj		1,700,000
Benefit from the tax incentives		100,000	2,500,000	4,300,000
Benefit from the tax incentives, per share		$ 0.00	$ 0.08	$ 0.13
Valuation allowance	14,577,000	14,577,000	20,019,000
Balance of unrecognized state tax positions	1,400,000	1,400,000
State And Foreign Net Operating Loss Carryforwards
Income Taxes [Line Items]
Operating Loss Carryforwards	3,000,000	3,000,000
Valuation allowance	2,800,000	2,800,000	1,700,000
Excess Capital Losses From Investments And Other Related Items
Income Taxes [Line Items]
Valuation allowance	16,400,000	16,400,000	11,400,000
Asset Impairments In Foreign Jurisdictions
Income Taxes [Line Items]
Valuation allowance	$ 400,000	$ 400,000	$ 1,900,000
Terphane Ltda
Income Taxes [Line Items]
Income tax rate		6.25%
Current effective tax rate		15.25%
Percentage of social contribution on income included in current effective tax rate		9.00%
Brazilian
Income Taxes [Line Items]
Federal statutory income tax rate		34.00%
Income tax rate		25.00%
Percentage of social contribution on income included in federal statutory income tax rate		9.00%
Minimum
Income Taxes [Line Items]
Net Operating Loss Carrforward Expiration Period		5 years
Maximum
Income Taxes [Line Items]
Net Operating Loss Carrforward Expiration Period		8 years