Commitments and Contingencies - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Commitments and Contingencies Disclosure [Abstract]
Operating Lease, Expense	$ 71,000	$ 52,200	$ 52,000
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability	52,000
Operating Lease, Right-of-Use Asset	186,800
Operating Lease, Liability	195,200
Operating Lease, Liability, Current	36,500
Operating Lease, Liability, Noncurrent	$ 158,700
Operating Lease, Weighted Average Discount Rate, Percent	5.60%
Operating Lease, Weighted Average Remaining Lease Term	7 years
Finance Lease, Right-of-Use Asset	$ 33,800
Finance Lease, Liability	33,288
Finance Lease, Liability, Current	1,900
Finance Lease, Liability, Noncurrent	31,400
Purchase Commitment, Remaining Minimum Amount Committed	$ 34,000