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Revenue Recognition (Tables)
 12 Months Ended
Dec. 31, 2021
Revenue from Contract with Customer [Abstract]  
Contract with Customer, Asset and Liability The timing of revenue recognition, billings, and cash collections resulted in the following contract assets and contract liabilities:
(Thousands)December 31, 2021December 31, 2020$ change% change
Accounts receivable, trade
$213,584 $156,821 $56,763 36 %
Unbilled receivables
7,961 8,832 (871)(10)%
Unearned revenue
7,770 7,713 57 1 %