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Leases - Supplemental Balance Sheet Information Related to Leases (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2019
Dec. 31, 2018
Leases [Abstract]    
Real estate leases, renewal term 5 years  
Operating leases    
ROU assets, net $ 129,526 $ 0
Lease liabilities, short-term 30,185 0
Lease liabilities, long-term 102,391 $ 0
Finance Leases    
ROU assets, net, 1,524  
Lease liabilities, short-term 712  
Lease liabilities, long-term $ 727