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Average Shares Outstanding (Details) - USD ($)
shares in Thousands, $ in Thousands
3 Months Ended 6 Months Ended
Apr. 03, 2020
Apr. 05, 2019
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Average Shares Outstanding            
Stock purchases (in shares)         378 510
Purchase of common shares         $ 12,959 $ 19,186
Stock dividends (as a percent)     3.00% 3.00% 3.00% 3.00%
Stock dividend shares distributed 1,942 1,914