LONG-TERM OBLIGATIONS (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Dec. 31, 2021	Jun. 30, 2021	Dec. 31, 2020
Line of Credit Facility [Line Items]
Cash and temporary investments	$ 31,129	$ 54,332	$ 53,934	$ 57,521
First Tennessee Bank National Association | Credit facility
Line of Credit Facility [Line Items]
Revolving credit facility	$ 50,000
Debt instrument description of non-default rate of interest	LIBOR Rate plus 1.00% or 1.25% per annum, depending on the leverage ratio
Amount drew on existing credit facility	$ 40,000
Line of credit outstanding borrowings	$ 40,000	$ 0
First Tennessee Bank National Association | Credit facility | Minimum
Line of Credit Facility [Line Items]
Non-usage fee for current loan agreement in annual amount percentage	0.15%
First Tennessee Bank National Association | Credit facility | Minimum | London Interbank Offered Rate (LIBOR) [Member]
Line of Credit Facility [Line Items]
Variable interest rate in addition to reference rate	1.00%
First Tennessee Bank National Association | Credit facility | Maximum
Line of Credit Facility [Line Items]
Non-usage fee for current loan agreement in annual amount percentage	0.35%
First Tennessee Bank National Association | Credit facility | Maximum | London Interbank Offered Rate (LIBOR) [Member]
Line of Credit Facility [Line Items]
Variable interest rate in addition to reference rate	1.25%