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ACCOUNTS RECEIVABLE
 12 Months Ended
Dec. 31, 2021
Receivables [Abstract]  
ACCOUNTS RECEIVABLE ACCOUNTS RECEIVABLE
Accounts receivable at December 31 consists of:
(In thousands)20212020
Trade Accounts Receivable$84,681 $78,577 
Unbilled Recoverable Costs and Accrued Profits25,941 17,697 
Total Receivables, Gross110,622 96,274 
Less Allowance for Estimated Credit Losses(3,183)(3,218)
Total Receivables, Net$107,439 $93,056 
The following table provides a roll-forward of the allowance for estimated credit losses that is deducted from accounts receivable to present the net amount expected to be collected at December 31:
(In thousands)
Balance at December 31, 2019
$3,559 
Bad Debt Expense, Net of Recoveries1,913 
Write-off Charges Against the Allowance and Other Adjustments(2,254)
Balance at December 31, 2020
$3,218 
Bad Debt Expense, Net of Recoveries90 
Write-off Charges Against the Allowance and Other Adjustments(125)
Balance at December 31, 2021
$3,183