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SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Allowance for doubtful accounts      
Movement in Valuation Allowances and Reserves      
Balance at Beginning of Period $ 4,815 $ 5,181 $ 4,813
Charged to Costs and Expenses 4,019 342 1,481
Net (Deductions) Recoveries (2,069) (708) (1,113)
Balance at End of Period 6,765 4,815 5,181
Deferred tax asset valuation allowance      
Movement in Valuation Allowances and Reserves      
Balance at Beginning of Period 490 471 445
Net (Deductions) Recoveries 375 19 26
Balance at End of Period 865 490 471
Reserve for obsolete or slow moving inventory      
Movement in Valuation Allowances and Reserves      
Balance at Beginning of Period 13,829 10,467 10,169
Charged to Costs and Expenses 5,016 5,826 6,467
Net (Deductions) Recoveries (5,609) (2,464) (6,169)
Balance at End of Period $ 13,236 $ 13,829 $ 10,467