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Income Taxes (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Income Taxes [Line Items]
Income Tax Expense (Benefit)	$ 1,317	$ 903	$ 4,533	$ 5,682
Deferred Tax Benefit Expense Valuation Allowance Adj Capital Loss Carryforwards			$ 100	$ 0
Effective Income Tax Rate Reconciliation, Percent			29.80%	35.20%
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest	4,725	$ 1,497	$ 15,223	$ 16,146
Brazilian [Member]
Income Taxes [Line Items]
Effective income tax rate reconciliation social contribution on income			9.00%
Effective Income Tax Rate Reconciliation Federal Statutory Tax Rate Excluding Social Contribution On Income			25.00%
Effective Income Tax Rate Reconciliation Federal Statutory Tax Rate Including Social Contribution On Income			34.00%
Excess Capital Losses From Investments And Other Related Items [Member]
Income Taxes [Line Items]
Deferred Tax Assets, Valuation Allowance	$ 10,800		$ 10,800
Terphane Ltda [Member]
Income Taxes [Line Items]
BrazilianTaxCreditDeductionPeriod			24 months
Current Effective Tax Rate Including Social Contribution On Income			15.25%
LengthBrazilianTaxIncentive			10 years

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Income Taxes [Line Items]

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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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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
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-Section 50
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