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Long-Term Debt - Summary (Details) - USD ($)
$ in Thousands
Mar. 31, 2021
Dec. 31, 2020
Aug. 26, 2020
Mar. 31, 2020
May 30, 2017
Debt Instrument [Line Items]          
Total long-term debt $ 537,108 $ 615,916   $ 652,263  
Deferred finance costs, net 6,900 7,100   3,300  
Revolving Unsecured Credit Facility due 2024 | Line of Credit          
Debt Instrument [Line Items]          
Total long-term debt 44,000 123,000   330,000  
5.375% senior unsecured notes due 2024 | Senior Notes          
Debt Instrument [Line Items]          
Total long-term debt $ 0 0   296,744  
Stated interest rate (as a percent) 5.375%       5.375%
4.625% Senior Unsecured Notes due 2028 | Senior Notes          
Debt Instrument [Line Items]          
Total long-term debt $ 493,108 492,916   0  
Stated interest rate (as a percent) 4.625%   4.625%    
Revolving Unsecured Uncommitted Credit Facility due 2023 | Line of Credit          
Debt Instrument [Line Items]          
Total long-term debt $ 0 $ 0   $ 25,519