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Recent Accounting Standards (Details) - USD ($)
$ in Thousands
Jun. 30, 2019
Jan. 01, 2019
Dec. 31, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Increase to assets $ 338,073   $ 327,712
Increase to liabilities 69,573   $ 53,158
Accounting Standards Update 2016-02      
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Effect of ASC 842 $ 400    
Increase to assets   $ 17,800  
Increase to liabilities   $ 17,800