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Long-Term Debt - Real Estate Facility (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2020
Dec. 31, 2019
Debt Instrument [Line Items]    
Amount outstanding $ 1,165,059 $ 1,167,636
Real Estate Facility    
Debt Instrument [Line Items]    
Amount outstanding 18,997 19,521
Term Loan Facility    
Debt Instrument [Line Items]    
Maximum borrowing capacity $ 1,190,000 1,190,000
Interest rate (as a percent) 3.90%  
Amount outstanding $ 1,146,062 1,148,115
Term Loan Facility | Secured Debt    
Debt Instrument [Line Items]    
Amount outstanding 1,146,062 1,148,115
Maximum borrowing capacity 1,195,000 1,195,000
Line of Credit | Real Estate Facility | Secured Debt    
Debt Instrument [Line Items]    
Maximum borrowing capacity $ 21,500 $ 21,500
Interest rate (as a percent) 4.65%  
Commitment fee (as a percent) 0.50%  
Additional borrowing capacity $ 0  
Amount outstanding $ 19,200