v3.19.3.a.u2
Summary of Significant Accounting Policies - Summary of Carrying Amount Reported on Consolidated Balance (Detail) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Summary Of Significant Accounting Policies [Abstract]    
Carrying amount $ 1,989,451 $ 1,450,551
Fair value $ 2,047,860 $ 1,439,264