Income Taxes (Details) - USD ($)	3 Months Ended
Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Provision for (benefit from) income taxes	$ (2,585,000)	$ 58,514,000
Effective tax rate	16.00%	12.50%
Current income taxes receivable	$ 46,600,000		$ 41,100,000
Current taxes payable	6,600,000		10,000,000
Operating loss carryforwards	239,300,000		239,300,000
Deferred tax asset, non-U.S. operating loss carryforward	44,900,000		44,900,000
Valuation allowance on deferred taxes	0		$ 0
Unrecognized tax benefits that would impact effective tax rate	$ 9,100,000

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

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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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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Carrying amount due within one year of the balance sheet date (or one operating cycle, if longer) from tax authorities as of the balance sheet date representing refunds of overpayments or recoveries based on agreed-upon resolutions of disputes.

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Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.

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Carrying value as of the balance sheet date of obligations incurred and payable for statutory income, sales, use, payroll, excise, real, property and other taxes. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate.

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