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Subsequent Events (Details) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Feb. 14, 2020
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Jan. 30, 2020
Subsequent Event [Line Items]          
Dividends paid   $ 109,147 $ 106,943 $ 101,511  
Subsequent Event          
Subsequent Event [Line Items]          
Dividends declared (usd per share)         $ 0.27
Dividends paid $ 27,300