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Shareholders' Equity (Tables)
12 Months Ended
Dec. 31, 2020
Equity [Abstract]  
Schedule of Stock Repurchase Activity
A summary of the stock repurchase activity under the stock repurchase program, reported based on the trade date, is summarized as follows:
(DOLLARS IN THOUSANDS)Shares RepurchasedWeighted-
Average Price
per Share
Dollar Amount Repurchased
Year Ended December 31, 2018108,109 $143.15 $15,475