New Accounting Pronouncements - Additional Information (Detail) - USD ($) $ in Thousands	Sep. 30, 2019	Jan. 01, 2019
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Company's ROU asset	$ 45,241
Total lease liability	57,523
Lease liability, current	11,522
Accounting Standards Update 2018-11
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Company's ROU asset	45,241	$ 56,591
Total lease liability	57,438	$ 64,877
Accounting Standards Update 2018-11 | Other Long Term Liabilities and Accrued Expenses
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Deferred rent	$ 8,300