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CAPITAL STOCK - Activity of Common Stock Outstanding (Details) - shares
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Common Stock:      
Balance, beginning of period (in shares) 19,208,067    
Balance, end of period (in shares) 18,580,364 19,208,067  
Common Stock      
Common Stock:      
Balance, beginning of period (in shares) 19,041,000 17,460,000 17,401,000
Issuance of shares for compensation net of withholding (in shares) 85,000 54,000 59,000
Issuance of common stock related to equity distribution agreements (in shares) 0 46,000 0
Issuance of common stock related to purchase of businesses (in shares) 527,000 1,481,000 0
Purchase of shares held in treasury (in shares) (1,185,000) 0 0
Balance, end of period (in shares) 18,468,000 19,041,000 17,460,000