BASIS OF PRESENTATION (Earnings Per Share) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Earnings Per Share
Net income	$ 55,924	$ 47,958	$ 170,343	$ 98,129
Preferred dividends	(2,013)	(2,437)	(6,038)	(2,437)
Net income available to common stockholders	$ 53,911	$ 45,521	$ 164,305	$ 95,692
Weighted average common shares outstanding for basic earnings per share (in shares)	42,303	36,941	42,241	36,882
Assumed incremental common shares issued upon vesting of outstanding restricted stock units (in shares)	113	54	140	74
Weighted average common shares for diluted earnings per share (in shares)	42,416	36,995	42,381	36,956
Earnings per common share — basic (in dollars per share)	$ 1.27	$ 1.23	$ 3.89	$ 2.59
Earnings per common share — diluted (in dollars per share)	$ 1.27	$ 1.23	$ 3.88	$ 2.59
Number of antidilutive common stock equivalents excluded from diluted earnings per share computation (in shares)	3	41	1	0