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Debt - Cash Pool (Details)
$ in Thousands
Mar. 31, 2020
USD ($)
cash_pool
Dec. 31, 2019
USD ($)
Debt Instrument [Line Items]    
Number of cash pools | cash_pool 2  
QRS Cash Pool    
Debt Instrument [Line Items]    
Number of cash pools | cash_pool 1  
Gross Cash Position $ 356,000 $ 372,100
Outstanding Debit Balances (354,700) (369,000)
Net Cash Position $ 1,300 3,100
TRS Cash Pool    
Debt Instrument [Line Items]    
Number of cash pools | cash_pool 1  
Gross Cash Position $ 358,500 319,800
Outstanding Debit Balances (354,700) (301,300)
Net Cash Position $ 3,800 $ 18,500