XML 119 R72.htm IDEA: XBRL DOCUMENT v3.20.4
Debt - Cash Pooling (Details)
 12 Months Ended
Dec. 31, 2020
USD ($)
cash_pool
Dec. 31, 2019
USD ($)
Debt Instrument [Line Items]    
Number of cash pools | cash_pool 2  
Credit Agreement    
Debt Instrument [Line Items]    
Letters of credit outstanding $ 36,160,000  
Credit Agreement | Revolving Credit Facility    
Debt Instrument [Line Items]    
Letters of credit outstanding $ 3,232,000  
QRS Cash Pool    
Debt Instrument [Line Items]    
Number of cash pools | cash_pool 1  
Cash Pool Agreement, Borrowings, Maximum $ 10,000,000  
GROSS CASH POSITION 448,700,000 $ 372,100,000
OUTSTANDING DEBIT BALANCES (447,400,000) (369,000,000)
NET CASH POSITION $ 1,300,000 3,100,000
TRS Cash Pool    
Debt Instrument [Line Items]    
Number of cash pools | cash_pool 1  
GROSS CASH POSITION $ 555,500,000 319,800,000
OUTSTANDING DEBIT BALANCES (553,500,000) (301,300,000)
NET CASH POSITION $ 2,000,000 $ 18,500,000