Income Taxes - Income Tax Temporary Differences Table (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Depreciable property	$ (18,642)	$ (280,377)
Credit carryforwards	0	497
Other intangible assets	(678)	(299)
Other	421	162
Net long-term deferred income tax liabilities	$ (18,899)	$ (280,017)

Amount, after deferred tax asset, of deferred tax liability attributable to taxable differences with jurisdictional netting.

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Amount, before allocation of valuation allowance, of deferred tax asset attributable to deductible temporary differences, classified as other.

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Amount of deferred tax liability attributable to taxable temporary differences from intangible assets other than goodwill.

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