Income Taxes - Reconciliation of the Federal Statutory Income Tax Rate to the Company's Effective Tax Rate (Details)	12 Months Ended
Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Effective Income Tax Rate Continuing Operations Tax Rate Reconciliation [Abstract]
Statutory Federal income tax rate	21.00%	35.00%	35.00%
State income taxes - net of Federal tax benefit	42.50%	8.30%	3.00%
Foreign tax rate differential	3.90%	(1.60%)	(0.90%)
Domestic production deduction	(0.00%)	(5.20%)	(3.20%)
Non-deductible expenses	93.80%	0.40%	2.90%
Impact of tax law changes	22.10%	(7.40%)	0.00%
Changes in unrecognized tax benefits	42.90%	0.90%	(0.80%)
Foreign tax incentives	(3.10%)	(0.00%)	(0.40%)
Valuation allowances	0.00%	0.00%	3.20%
Other	(4.40%)	0.60%	0.70%
Effective tax rate for the year	218.70%	31.00%	39.50%

Effective income tax rate reconciliation, changes in unrecognized tax benefits.

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Effective income tax rate reconciliation foreign tax incentives.

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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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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to changes in the valuation allowance for deferred tax assets.

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations applicable to statutory income tax expense (benefit) outside of the country of domicile.

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations applicable to state and local income tax expense (benefit), net of federal tax expense (benefit).

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