SHARE CAPITAL AND CAPITAL IN EXCESS OF PAR VALUE (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Changes in share capital and capital in excess of par value
Balance at the beginning of the period	$ 870,409
Balance at the beginning of the period (in shares)	105
Balance at the end of the period	$ 940,568	$ 870,409
Balance at the end of the period (in shares)	108	105
Total Number of Shares Purchased	209	448	928
Average Price Paid Per Share (in dollars per share)	$ 31.05	$ 30.16	$ 35.66
Stock dividends (as a percent)	3.00%	3.00%	3.00%
Common Stock
Changes in share capital and capital in excess of par value
Balance at the beginning of the period	$ 28,325	$ 27,777	$ 27,584
Balance at the beginning of the period (in shares)	40,789	39,999	39,721
Issuance of 3% stock dividend	$ 842	$ 830	$ 823
Issuance of 3% stock dividend (in shares)	1,213	1,196	1,185
Conversion of Class B common shares to common shares	$ 20	$ 29	$ 14
Conversion of Class B common shares to common shares (in shares)	28	42	20
Purchase and retirement of common shares	$ (145)	$ (311)	$ (644)
Purchase and retirement of common shares (in shares)	(209)	(448)	(927)
Balance at the end of the period	$ 29,042	$ 28,325	$ 27,777
Balance at the end of the period (in shares)	41,821	40,789	39,999
Treasury Stock
Changes in share capital and capital in excess of par value
Balance at the beginning of the period	$ (1,992)	$ (1,992)	$ (1,992)
Balance at the beginning of the period (in shares)	105	102	99
Issuance of 3% stock dividend (in shares)	3	3	3
Balance at the end of the period	$ (1,992)	$ (1,992)	$ (1,992)
Balance at the end of the period (in shares)	108	105	102
Capital in Excess of Par Value
Changes in share capital and capital in excess of par value
Balance at the beginning of the period	$ 788,894	$ 737,453	$ 719,606
Issuance of 3% stock dividend	64,817	64,800	50,649
Purchase and retirement of common shares	(6,403)	(13,359)	(32,802)
Balance at the end of the period	847,308	788,894	737,453
Class B Common Stock | Common Stock
Changes in share capital and capital in excess of par value
Balance at the beginning of the period	$ 21,032	$ 20,448	$ 19,866
Balance at the beginning of the period (in shares)	30,286	29,445	28,607
Issuance of 3% stock dividend	$ 631	$ 613	$ 596
Issuance of 3% stock dividend (in shares)	908	883	858
Conversion of Class B common shares to common shares	$ (20)	$ (29)	$ (14)
Conversion of Class B common shares to common shares (in shares)	(28)	(42)	(20)
Balance at the end of the period	$ 21,643	$ 21,032	$ 20,448
Balance at the end of the period (in shares)	31,166	30,286	29,445