Summary of Significant Accounting Policies - Recently Adopted Accounting Pronouncements - Additional Information (Detail) - USD ($) $ in Thousands	Dec. 31, 2019	Jan. 01, 2019	Jan. 01, 2018
Significant Accounting Policies [Line Items]
Operating lease liabilities	$ 303,823
Operating lease right-of-use assets	$ 221,197
Accounting Standards Update 2016-02
Significant Accounting Policies [Line Items]
Operating lease liabilities		$ 290,000
Operating lease right-of-use assets		$ 230,000
ASU 2014-09 Revenue from Contracts with Customers | Reduction In Deferred Revenue
Significant Accounting Policies [Line Items]
Offsetting adjustments to accumulated deficit			$ (68,200)
ASU 2014-09 Revenue from Contracts with Customers | Reduction In Deferred Tax Asset
Significant Accounting Policies [Line Items]
Offsetting adjustments to accumulated deficit			$ 13,600