XML 36 R71.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2
Debt - Credit Facilities (Details) - Line of Credit - Fifth Amended and Restated Credit Agreement - USD ($)
Dec. 05, 2018
Dec. 31, 2019
Line of Credit Facility [Line Items]    
Percentage of loan availability from pledged assets from mortgaged assets, maximum 10.00%  
Borrowings outstanding   $ 0
Letters of credit outstanding   47,500,000
Revolving Credit Facility    
Line of Credit Facility [Line Items]    
Credit Facility, maximum borrowing capacity $ 250,000,000  
Current borrowing capacity   172,500,000
Letter of credit sublimit    
Line of Credit Facility [Line Items]    
Credit Facility, maximum borrowing capacity 60,000,000  
Letters of credit outstanding   41,900,000
Swingline Line of Credit    
Line of Credit Facility [Line Items]    
Credit Facility, maximum borrowing capacity 50,000,000  
Option to increase maximum borrowing capacity    
Line of Credit Facility [Line Items]    
Credit Facility, maximum borrowing capacity $ 100,000,000  
Letter of Credit    
Line of Credit Facility [Line Items]    
Credit Facility, maximum borrowing capacity   $ 47,500,000
Applicable Margin, Less Than Or Equal To 35% Utilization    
Line of Credit Facility [Line Items]    
Facility utilization percentage 35.00%  
Applicable Margin, Less Than Or Equal To 35% Utilization | LIBOR    
Line of Credit Facility [Line Items]    
Basis spread on variable rate basis 2.25%  
Applicable Margin, Greater Than 35% But Less Than Or Equal To 50% Utilization | Minimum    
Line of Credit Facility [Line Items]    
Facility utilization percentage 35.00%  
Applicable Margin, Greater Than 35% But Less Than Or Equal To 50% Utilization | Maximum    
Line of Credit Facility [Line Items]    
Facility utilization percentage 50.00%  
Applicable Margin, Greater Than 35% But Less Than Or Equal To 50% Utilization | LIBOR    
Line of Credit Facility [Line Items]    
Basis spread on variable rate basis 2.75%  
Applicable Margin, Greater Than 50% Utilization    
Line of Credit Facility [Line Items]    
Facility utilization percentage 50.00%  
Applicable Margin, Greater Than 50% Utilization | LIBOR    
Line of Credit Facility [Line Items]    
Basis spread on variable rate basis 3.25%  
Unused Commitment Fee, Outstanding Debt Percentage Greater Than Or Equal To 50%    
Line of Credit Facility [Line Items]    
Quarterly commitment fee 0.25%  
Line of credit percentage outstanding 50.00%  
Unused Commitment Fee, Outstanding Debt Percentage Less Than 50%    
Line of Credit Facility [Line Items]    
Quarterly commitment fee 0.35%  
Line of credit percentage outstanding 50.00%