Leases - Schedule of Financial Statement Classification of Lease Balances With Consolidated Statement of Operations (Detail) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2020
Lessee Lease Description [Line Items]
Total lease cost	$ 6,808	$ 20,468
Selling and Administrative Expenses [Member]
Lessee Lease Description [Line Items]
Operating lease cost	6,460	19,412
Amortization of leased assets	324	972
Interest Expense, Net [Member]
Lessee Lease Description [Line Items]
Interest on lease liabilities	$ 24	$ 84