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New Accounting Pronouncements - Additional Information (Details) - USD ($)
$ in Thousands
Jun. 30, 2019
Jan. 01, 2019
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]    
Right-of-use assets $ 13,267  
Lease liabilities $ 12,772  
ASU 2016-02    
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]    
Right-of-use assets   $ 17,146
Lease liabilities   16,697
Right-of-use assets and lease liabilities difference   449
Right-of-use assets and lease liabilities difference, net of tax effects   114
Retained Earnings | ASU 2016-02    
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]    
Right-of-use assets and lease liabilities difference   261
Prepaid and Other Current Assets | ASU 2016-02    
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]    
Right-of-use assets and lease liabilities difference   $ (74)