Commitments and Contingencies - Additional Information (Detail) - USD ($)	1 Months Ended	12 Months Ended
	Feb. 29, 2016	Dec. 31, 2019	Jan. 31, 2020	Dec. 31, 2018
Contingencies And Commitments [Line Items]
Estimated sales tax and related penalties and interest		$ 16,100,000		$ 12,300,000
Deductible for marine liability coverage including personal injury claims, per first occurrence		5,000,000.0
Range of deductible for liability coverage for personal injury claims, lower limit		5,000,000.0
Range of deductible for liability coverage for personal injury claims, upper limit		100,000,000.0
Purchase obligations		0
Maturity of service arrangement	10 years
Annual payments due under service agreement		39,000,000
Total remaining payments due under service agreement		250,000,000
Total Contingent Liabilities Under Letters of Credit and Bonds [Member]
Contingencies And Commitments [Line Items]
Contingent liability under letters of credit and other bonds		37,100,000
Potentially Collateralized Contingent Liability Under Letters Of Credit and Bonds [Member]
Contingencies And Commitments [Line Items]
Contingent liability under letters of credit and other bonds		28,500,000
Uncollateralized Contingent Liability Under Letters of Credit and Bonds [Member]
Contingencies And Commitments [Line Items]
Contingent liability under letters of credit and other bonds		8,600,000
Collateralized Contingent Liability Under Financial Letters of Credit and Surety Bond [Member] | Subsequent Event [Member]
Contingencies And Commitments [Line Items]
Contingent liability under letters of credit and other bonds			$ 6,000,000.0
Windstorms in U.S. Gulf of Mexico [Member]
Contingencies And Commitments [Line Items]
Deductible for marine liability coverage including personal injury claims, per first occurrence		25,000,000.0
Range of deductible for liability coverage for personal injury claims, lower limit		25,000,000.0
Range of deductible for liability coverage for personal injury claims, upper limit		100,000,000.0
Personal Injury Claims [Member]
Contingencies And Commitments [Line Items]
Personal injury claims recorded		17,400,000		27,900,000
Personal Injury Claims [Member] | Accrued Liabilities [Member]
Contingencies And Commitments [Line Items]
Personal injury claims recorded		6,400,000		5,200,000
Personal Injury Claims [Member] | Other Liabilities [Member]
Contingencies And Commitments [Line Items]
Personal injury claims recorded		$ 11,000,000.0		$ 22,700,000