Quarterly report pursuant to Section 13 or 15(d)

Long-Term Debt - Notes Narrative (Details)

v3.20.1
Long-Term Debt - Notes Narrative (Details) - USD ($)
3 Months Ended
Mar. 10, 2017
Mar. 31, 2020
Dec. 31, 2019
Debt Instrument [Line Items]      
Debt Instrument Percentage Of Outstanding Principal Amount Redeemable Upon Event Of Default   25.00%  
Debt outstanding   $ 919,191,000 $ 714,968,000
Maximum Borrowing 2019 Mortgage Facility   $ 112,200,000  
Mortgage notes      
Debt Instrument [Line Items]      
Debt weighted average interest rate on note   4.01%  
Debt outstanding   $ 350,100,000  
5.0% Notes      
Debt Instrument [Line Items]      
Stated interest rate   5.00%  
6.125% Notes      
Debt Instrument [Line Items]      
Notes Redemption Price Percentage Of Par Value Due To Change Of Control 101.00%    
Stated interest rate 6.125% 6.125%  
Principal amount $ 250,000,000.0    
Notes issued, percent of principal 100.00%    
Maximum dividend (usd per share)   $ 0.12  
2019 Mortgage Facility [Member]      
Debt Instrument [Line Items]      
Stated interest rate   2.50%  
Long Term Debt Prepayment   $ 500,000  
Debt Instrument, Unused Borrowing Capacity, Amount   $ 3,100,000  
Debt Instrument Maximum Allowed Dividends Per Share   $ 0.10  
Percent of Collateralized Real Estate   75.00%  
Minimum | 5.0% Notes      
Debt Instrument [Line Items]      
Debt Instrument Other Outstanding Indebtedness In Excess   $ 50,000,000.0  
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%