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Revenue Recognition (Tables)
 6 Months Ended
Jul. 02, 2021
Revenue from Contract with Customer [Abstract]  
Contract with Customer, Asset and Liability
Contract Balances: The timing of revenue recognition, billings, and cash collections resulted in the following contract assets and contract liabilities:
(Thousands)July 2, 2021December 31, 2020$ change% change
Accounts receivable, trade
$169,279 $156,821 $12,458 8 %
Unbilled receivables
10,682 8,832 1,850 21 %
Unearned revenue
10,920 7,713 3,207 42 %