Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies - Additional Information (Detail)

v3.19.1
Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($)
$ in Thousands
Mar. 31, 2019
Jan. 01, 2019
Summary Of Significant Accounting Policies [Abstract]    
Operating lease right of use asset $ 63,120 $ 65,000
Operating lease liability $ 71,311 $ 74,400