Condensed Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2020	Mar. 31, 2019
Statement Of Income And Comprehensive Income [Abstract]
Net loss	$ (861,940)	$ (73,328)
Derivative financial instruments:
Reclassification adjustment for gain included in net loss	(1)	(1)
Investments in marketable securities:
Unrealized holding gain		14
Reclassification adjustment for gain included in net loss		(32)
Total other comprehensive loss	(1)	(19)
Comprehensive loss	$ (861,941)	$ (73,347)

Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

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Amount, after tax, of reclassification of gain (loss) from accumulated other comprehensive income (AOCI) for derivative instrument designated and qualifying as cash flow hedge included in assessment of hedge effectiveness.

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Amount after tax, before reclassification adjustments, of unrealized holding gain (loss) on available-for-sale securities.

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