EARNINGS PER COMMON SHARE (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Earnings per common share
Net income	$ 150,674	$ 34,778	$ 330,773	$ 183,982
Less: Preferred share dividends	7,563	7,563	15,125	15,125
Net income available to common shareholders	$ 143,111	$ 27,215	$ 315,648	$ 168,857
Weighted average common shares outstanding (in shares)	85,207	85,173	85,036	85,068
Earnings per common share (in usd per share)	$ 1.68	$ 0.32	$ 3.71	$ 1.98
Earnings per diluted common share
Net income available to common shareholders	$ 143,111	$ 27,215	$ 315,648	$ 168,857
Weighted average common shares outstanding (in shares)	85,207	85,173	85,036	85,068
Share-based compensation plans (in shares)	605	670	797	758
Weighted average diluted common shares outstanding (in shares)	85,812	85,843	85,833	85,826
Earnings per diluted common share (in usd per share)	$ 1.67	$ 0.32	$ 3.68	$ 1.97
Weighted average anti-dilutive shares excluded from the dilutive computation (in shares)	736	146	770	567