New Accounting Pronouncements - Additional Information (Detail) - USD ($) $ in Thousands	Mar. 31, 2019	Jan. 01, 2019
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Company's ROU asset	$ 54,452
Total lease liability	63,362
Lease liability, current	10,557
Accounting Standards Update 2018-11
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Company's ROU asset	54,452	$ 56,591
Total lease liability	63,362	$ 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