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New Accounting Pronouncements - Additional Information (Details) - USD ($)
$ in Thousands
Jun. 30, 2019
Jan. 01, 2019
Jan. 01, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Operating lease assets $ 304,655    
Lease liabilities $ 313,759    
Impact of new accounting pronouncements   $ (6,771) $ 1,721
Accounting Standards Update 2016-02      
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Operating lease assets   336,083  
Lease liabilities   344,362  
Reduction to deferred tax liabilities   1,508  
Retained Earnings      
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Impact of new accounting pronouncements   (6,771) $ 1,897
Retained Earnings | Accounting Standards Update 2016-02      
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Impact of new accounting pronouncements   $ (6,771)