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New Accounting Pronouncement - Additional Information (Details) - USD ($)
$ in Thousands
Jun. 30, 2019
Jan. 02, 2019
Dec. 31, 2018
Jun. 30, 2018
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]        
Operating lease right of use asset $ 136,790   $ 0  
Opearing lease liability 152,306      
Cumulative effect of accounting change $ 4,905     $ 1,935
ASU 2016-02        
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]        
Operating lease right of use asset   $ 139,000    
Deferred rent liabilities   15,000    
Opearing lease liability   154,000    
Cumulative effect of accounting change   $ 4,800