SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Description
Balance at beginning of year	$ 7,287	$ 6,934	$ 5,712
Additions charged to expense	10,533	9,235	11,251
Deductions	9,984	8,882	10,029
Balance at End of Year	7,836	7,287	6,934
Reserve for bad debts
Description
Balance at beginning of year	1,108	1,337	1,128
Additions charged to expense	418	123	676
Deductions	134	352	467
Balance at End of Year	1,392	1,108	1,337
Reserve for cash discounts
Description
Balance at beginning of year	586	612	692
Additions charged to expense	10,153	8,504	9,482
Deductions	9,850	8,530	9,562
Balance at End of Year	889	586	612
Deferred tax asset valuation
Description
Balance at beginning of year	5,593	4,985	3,892
Additions charged to expense	(38)	608	1,093
Balance at End of Year	$ 5,555	$ 5,593	$ 4,985