Income Taxes - Reconcilliation of Effective Income Tax Rate to Federal Statutory Rate (Details)	12 Months Ended
Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Income Tax Disclosure [Abstract]
Federal income tax rate	34.00%	34.00%	(34.00%)
Foreign income tax benefit/loss	(22.10%)	(8.60%)	(9.80%)
State tax net of federal benefit	0.20%	1.40%	(1.60%)
Permanent Items:
Change in fair value of redeemable warrants		4.50%	12.10%
Change in fair market value of stock warrants	(24.00%)	(0.90%)	8.00%
Incentive stock options	0.00%	(2.60%)	2.20%
Other	0.40%	(0.70%)	(1.40%)
Effect of permanent differences	(23.60%)	0.30%	20.90%
Rate Change	(19.90%)	0.00%	0.00%
Effective income tax rate	(31.40%)	27.10%	(24.50%)
Change in valuation allowance	(0.30%)	0.20%	(2.10%)
Effective income tax rate	31.10%	(26.90%)	22.40%

Effective Income Tax Rate, Before Valuation Allowance

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Effective Income Tax Rate Reconciliation, Nondeductible Expense, Change in Fair Maket Value of Redeemable Warrants

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Effective Income Tax Rate Reconciliation, Nondeductible Expense, Change in Fair Maket Value of Stock Warrants

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- Definition

A ratio calculated by dividing the reported amount of income tax expense attributable to continuing operations for the period by GAAP-basis pretax income from continuing operations.

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The domestic federal statutory tax rate applicable under enacted tax laws to the Company's pretax income from continuing operations for the period. The "statutory" tax rate is the regular tax rate if there are alternative tax systems.

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The portion of the difference between the effective income tax rate and domestic federal statutory income tax rate attributable to changes in the valuation allowance for deferred tax assets.

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The portion of the difference between total income tax expense or benefit as reported in the Income Statement and the expected income tax expense or benefit that is attributable to changes in the income tax laws or rates.

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The portion of the difference between the effective income tax rate and domestic federal statutory income tax rate that can be explained by the difference between statutory income tax rates in foreign jurisdictions and the domestic federal statutory income tax rate recorded during the period.

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The sum of the differences between the effective income tax rate and domestic federal statutory income tax rate attributable to all nondeductible expenses under enacted tax laws.

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The portion of the difference between the effective income tax rate and domestic federal statutory income tax rate attributable to nondeductible expenses under enacted tax laws, or differences in the methodologies used to determine expense amounts for financial statements prepared in accordance with generally accepted accounting principles, not otherwise listed in the existing taxonomy.

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The portion of the difference between the effective income tax rate and domestic federal statutory income tax rate attributable to differences in the deductibility or nondeductibility of incentive stock options and other equity-based compensation costs in accordance with generally accepted accounting principles and enacted tax laws.

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The portion of the difference between the effective income tax rate and domestic federal statutory income tax rate that can be explained by the state and local income tax expense or benefit, net of the federal tax benefit (expense) thereon, recorded during the period.

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