SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Earnings per share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Net income	$ 368,599	$ 356,565	$ 266,756
Payments of Ordinary Dividends, Common Stock	(211,618)	(208,656)	(160,487)
Undistributed earnings for the period	$ 156,981	$ 147,909	$ 106,269
Weighted average shares outstanding - basic	492,300	492,054	491,604
Dilutive effect of restricted stock units	$ 113
Weighted average shares outstanding - diluted	492,413	492,054	491,604
Basic earnings per share	$ 0.75	$ 0.72	$ 0.54
Diluted earnings per share	$ 0.75	$ 0.72	$ 0.54
Common Stock
Payments of Ordinary Dividends, Common Stock	$ (210,509)	$ (207,482)	$ (159,524)
Undistributed earnings for the period	$ 156,123	$ 147,069	$ 99,676
Weighted average shares outstanding - basic	489,719	489,259	488,364
Earnings Per Share, Basic, Distributed earnings	$ 0.43	$ 0.42	$ 0.33
Earnings Per Share, Basic, Undistributed earnings	0.32	0.30	0.21
Earnings Per Share, Diluted, Distributed earnings	0.43	0.42	0.33
Earnings Per Share, Diluted, Undistributed earnings	0.32	0.30	0.21
Basic earnings per share	0.75	0.72	0.54
Diluted earnings per share	$ 0.75	$ 0.72	$ 0.54
Time Lapse Restricted Shares
Payments of Ordinary Dividends, Common Stock	$ (1,109)	$ (1,174)	$ (963)
Undistributed earnings for the period	$ 823	$ 840	$ 661
Weighted average shares outstanding - basic	2,581	2,795	3,240
Earnings Per Share, Basic, Distributed earnings	$ 0.43	$ 0.42	$ 0.30
Earnings Per Share, Basic, Undistributed earnings	0.32	0.30	0.20
Earnings Per Share, Diluted, Distributed earnings	0.43	0.42	0.30
Earnings Per Share, Diluted, Undistributed earnings	0.32	0.30	0.20
Basic earnings per share	0.75	0.72	0.50
Diluted earnings per share	$ 0.75	$ 0.72	$ 0.50
Restricted shares
Undistributed earnings for the period	$ 36
Earnings Per Share, Diluted, Undistributed earnings	$ 0.32
Diluted earnings per share	$ 0.32