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Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Income Tax Contingency [Line Items]
Effective income tax rate	24.80%	22.80%	25.90%	22.70%
Share-based compensation, excess tax benefit, percent		2.20%
Insurance receivable and other noncurrent assets	$ 56,957		$ 56,957		$ 64,192
Accrued interest and penalties related to uncertain tax positions	1,800		1,800
Other Noncurrent Liabilities
Income Tax Contingency [Line Items]
Unrecognized tax benefits	13,400		13,400
Deferred Tax Asset
Income Tax Contingency [Line Items]
Insurance receivable and other noncurrent assets	$ 5,200		$ 5,200

X

- Definition

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

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Percentage of difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying domestic federal statutory income tax rate to pretax income (loss) from continuing operation, attributable to expense for award under share-based payment arrangement. Excludes expense determined to be nondeductible upon grant or after for award under share-based payment arrangement.

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Amount of unrecognized tax benefits.

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Amount accrued for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return.

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