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Leases - Additional Information (Detail) - USD ($)
$ in Thousands
Mar. 31, 2019
Jan. 01, 2019
Operating lease, not yet commenced, value $ 19,400  
Operating Lease term,Lease not yet commenced 15 years  
Operating Lease Right-of-Use-Assets $ 91,837  
Operating lease liability $ 107,075  
Accounting Standards Update 2016-02 [Member]    
Operating Lease Right-of-Use-Assets   $ 90,900
Operating lease liability   $ 104,400