CAPITAL STOCK (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Class of Stock [Line Items]
Authorized common stock (in shares)	199,000,000	199,000,000
Common stock and treasury stock and the share activity
Balance at the beginning of the year (in shares)	69,500,000
Balance at the end of the year (in shares)	70,400,000	69,500,000
Cash dividends paid on the common stock	$ 98,509	$ 92,658	$ 90,208
Common Shares
Common stock and treasury stock and the share activity
Balance at the beginning of the year (in shares)	69,516,805	68,608,508	67,341,316
Restricted stock vestings (in shares)	171,935	79,700	41,268
Balance at the end of the year (in shares)	70,370,812	69,516,805	68,608,508
Common Shares | Stock Awards Plans
Common stock and treasury stock and the share activity
Stock option exercises (in shares)	634,572	802,046	1,079,841
Common Shares | Director Stock Option Plans
Common stock and treasury stock and the share activity
Stock option exercises (in shares)	47,500	26,551	146,083
Treasury Stock
Common stock and treasury stock and the share activity
Balance at the beginning of the year (in shares)	4,528,051	4,836,027	4,424,884
Common stock repurchased (in shares)	614,974	0	778,848
Balance at the end of the year (in shares)	4,852,709	4,528,051	4,836,027
Treasury Stock | Stock Awards Plans
Common stock and treasury stock and the share activity
Stock option exercises (in shares)	290,316	307,976	367,705