DERIVATIVE AND HEDGING ACTIVITIES - Narrative (Details) $ in Millions	9 Months Ended
	Sep. 30, 2021 USD ($)
Collar
Derivative [Line Items]
Gain (loss) on derivatives	$ 1.3
Tax benefit on loss from derivatives	0.3
Amount expected to be reclassified within next twelve months	0.9
Total Return Swap | Not Designated as Hedging Instrument
Derivative [Line Items]
Derivative, notional amount	25.6
Benefit recorded as a result of change in fair value	2.6
Total Return Swap | Not Designated as Hedging Instrument | Station operating expenses
Derivative [Line Items]
Benefit recorded as a result of change in fair value	1.8
Total Return Swap | Not Designated as Hedging Instrument | Corporate general and administrative expenses
Derivative [Line Items]
Benefit recorded as a result of change in fair value	0.8
Other Long Term Liabilities
Derivative [Line Items]
Derivative liability	$ 1.2