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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 |  |

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