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Dividends - Additional Information (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 9 Months Ended
Oct. 21, 2020
Sep. 30, 2020
Jun. 30, 2020
Mar. 31, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Equity [Abstract]              
Dividends paid   $ 15,222 $ 15,128 $ 15,033   $ 45,383 $ 44,065
Subsequent Event [Line Items]              
Dividends declared (in dollars per share)   $ 0.20500     $ 0.20000 $ 0.61125 $ 0.59625
Subsequent Event              
Subsequent Event [Line Items]              
Dividends declared (in dollars per share) $ 0.20500