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INCENTIVE STOCK PLANS - Performance Shares (Details) - Performance Shares - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common shares reserved for performance shares granted during year (in shares)	285,863	193,333	191,203
Weighted average fair value of performance share units granted (in dollars per share)	$ 37.77	$ 45.68	$ 36.10
Intrinsic value of outstanding performance share units	$ 12,730	$ 13,123	$ 16,360
Fair value of performance shares vested	5,863	5,549	1,738
Cash used to purchase common shares from current and former employees to pay withholding tax requirements on restricted shares vested	$ 2,342	$ 2,454	$ 559

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