SHARE-BASED COMPENSATION - Recognized Non-Cash Stock-Based Compensation Expense (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense included in operating expenses	$ 12,934	$ 9,255	$ 16,184
Income tax benefit	2,929	2,222	3,703
After-tax stock-based compensation expense	10,005	7,033	12,481
Station operating expenses
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense included in operating expenses	4,181	2,348	4,673
Corporate general and administrative expenses
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense included in operating expenses	$ 8,753	$ 6,907	$ 11,511

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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