Quarterly report pursuant to Section 13 or 15(d)

Long-Term Debt - Notes Narrative (Details)

v3.21.1
Long-Term Debt - Notes Narrative (Details) - USD ($)
3 Months Ended
Mar. 10, 2017
Mar. 31, 2021
Dec. 31, 2020
Debt Instrument [Line Items]      
Debt outstanding   $ 718,962,000 $ 727,930,000
Maximum Borrowing 2019 Mortgage Facility   112,200,000  
Maximum Borrowing 2020 Line of Credit Facility   54,100,000  
Remaining Availability 2020 LOC   54,100,000  
Outstanding Balance 2020 LOC   $ 0  
Mortgage notes      
Debt Instrument [Line Items]      
Debt weighted average interest rate on note   3.50%  
Debt outstanding   $ 370,800,000  
5.0% Notes      
Debt Instrument [Line Items]      
Stated interest rate   5.00%  
6.125% Notes      
Debt Instrument [Line Items]      
Stated interest rate 6.125% 6.125%  
Principal amount $ 250,000,000.0    
Notes issued, percent of principal 100.00%    
2019 Mortgage Facility [Member]      
Debt Instrument [Line Items]      
Maximum dividend (usd per share)   $ 0.10  
Debt Instrument, Unused Borrowing Capacity, Amount   $ 14,000,000.0  
Percent of Collateralized Real Estate   75.00%  
Minimum | 2019 Mortgage Facility [Member]      
Debt Instrument [Line Items]      
Debt Instrument, Basis Spread on Variable Rate   0.50%  
Debt Instrument, Basis Spread LIBOR   1.50%  
Maximum | 2019 Mortgage Facility [Member]      
Debt Instrument [Line Items]      
Debt Instrument, Basis Spread on Variable Rate   1.75%  
Debt Instrument, Basis Spread LIBOR   2.75%