Quarterly report pursuant to Section 13 or 15(d)

Long-Term Debt - Notes Narrative (Details)

v3.19.1
Long-Term Debt - Notes Narrative (Details) - USD ($)
3 Months Ended
Mar. 10, 2017
Sep. 30, 2016
May 09, 2013
Mar. 31, 2019
Dec. 31, 2018
Debt Instrument [Line Items]          
Debt Instrument Percentage Of Outstanding Principal Amount Redeemable Upon Event Of Default       25.00%  
Debt outstanding       $ 929,698,000 $ 956,017,000
Mortgage notes          
Debt Instrument [Line Items]          
Debt weighted average interest rate on note       4.69%  
Debt outstanding       $ 390,400,000  
5.0% Notes          
Debt Instrument [Line Items]          
Notes Redemption Price Percentage Of Par Value Due To Change Of Control     101.00%    
Stated interest rate     5.00% 5.00%  
Principal amount     $ 300,000,000.0    
Notes issued, percent of principal     100.00%    
Outstanding notes repurchased amount   $ 10,700,000      
Repurchase amount paid in cash, plus accrued and unpaid interest related thereto   $ 10,600,000      
Maximum dividend (usd per share)     $ 0.10    
6.125% Notes          
Debt Instrument [Line Items]          
Debt Instrument, Redemption Price, Percentage       106.125%  
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  
Minimum | 5.0% Notes          
Debt Instrument [Line Items]          
Debt Instrument Other Outstanding Indebtedness In Excess       $ 50,000,000.0  
Maximum | 6.125% Notes          
Debt Instrument [Line Items]          
Redemption percentage of principal amount       35.00%