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CAPITAL STOCK (Tables)
12 Months Ended
Dec. 31, 2021
Equity [Abstract]  
Schedule of Activity Related to Common Stock Outstanding
The activity related to outstanding common stock and common stock held in treasury was as follows:

 December 31,
 202120202019
Common Stock:Quantity (in thousands)
Balance, beginning of period19,041 17,460 17,401 
Issuance of shares for compensation net of withholding85 54 59 
Issuance of common stock related to equity distribution agreements— 46 — 
Issuance of common stock related to purchase of businesses527 1,481 — 
Purchase of shares held in treasury(1,185)— — 
Balance, end of period18,468 19,041 17,460