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Average Shares Outstanding (Details) - USD ($)
shares in Thousands, $ in Thousands
3 Months Ended 9 Months Ended
Apr. 03, 2020
Apr. 05, 2019
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Average Shares Outstanding            
Stock purchases (in shares)         705 726
Purchase of common shares         $ 23,505 $ 27,232
Stock dividends (as a percent)     3.00% 3.00% 3.00% 3.00%
Stock dividend shares distributed 1,942 1,914