LONG-TERM DEBT AND FINANCING ARRANGEMENTS - Summary (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Long-term debt obligations
Long-term debt	$ 243,158	$ 264,623
Less current portion	66,862	66,252
Long-term debt, less current portion	176,296	198,371
Credit Facility
Long-term debt obligations
Long-term debt	$ 50,000	50,000
Interest rate (as a percent)	6.50%
Credit Facility | Interest rate swap agreement, maturing on October 1, 2024
Long-term debt obligations
Amount of borrowings covered by the interest rate swap	$ 50,000	$ 50,000
Effective fixed interest rate on hedged borrowings (as a percent)	1.55%	1.55%
Notes payable
Long-term debt obligations
Long-term debt	$ 193,158	$ 214,623
Weighted-average interest rate (as a percent)	3.70%