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Accrued Liabilities
 12 Months Ended
Dec. 31, 2020
Payables and Accruals [Abstract]  
Accrued Liabilities
16. Accrued Liabilities
Accrued liabilities consist of:
(in thousands)
20202019
Salaries and wages
$23,571 $22,878 
Contract loss reserve
11,250 17,190 
Employee benefits
12,952 14,235 
Returns and allowances
10,560 11,249 
Accrual for compensated absences
10,655 10,445 
Dividends
6,469 6,139 
Contract liabilities
8,206 5,656 
Lease liability - Operating lease
4,433 4,023 
Lease liability - Financing lease
1,438 1,835 
Postretirement medical benefits – current portion
3,660 3,808 
Restructuring costs
1,908 1,342 
Professional fees
3,451 2,999 
Pension liability – current portion
2,281 2,155 
Workers' compensation
1,685 1,982 
Utilities
1,285 790 
Interest
701 517 
Other
20,954 18,642 
Total
$125,459 $125,885