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Contracts with Customers - Summary of Changes in Contract Assets and Contract Liabilities (Parenthetical) (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2019	Dec. 31, 2018
Revenue From Contract With Customer [Abstract]
Reversal for provision for contract losses	$ 0	$ 133,180
Increase in revenue recorded in other income		$ 55,100

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- Definition

Increase in revenue due to reversal of provision for contract losses.

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- Definition

Reversal of provision for contract losses.

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No definition available.

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- References

No definition available.

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