BASIS OF PRESENTATION (Earnings Per Share) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Net income	$ 49,416	$ 51,873	$ 102,192	$ 94,962
Preferred dividends	(2,012)	(2,012)	(4,025)	(4,025)
Net income available to common stockholders	$ 47,404	$ 49,861	$ 98,167	$ 90,937
Weighted average common shares outstanding for basic earnings per share (in shares)	42,696,000	42,475,000	42,655,000	42,418,000
Assumed incremental common shares issued upon vesting of outstanding restricted stock units (in shares)	62,000	91,000	98,000	145,000
Weighted average common shares for diluted earnings per share (in shares)	42,758,000	42,566,000	42,753,000	42,563,000
EARNINGS PER COMMON SHARE - BASIC (in dollars per share)	$ 1.11	$ 1.17	$ 2.30	$ 2.14
EARNINGS PER COMMON SHARE - DILUTED (in dollars per share)	$ 1.11	$ 1.17	$ 2.30	$ 2.14
Common Stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Number of antidilutive common stock equivalents and stock options excluded from diluted earnings per share computation (in shares)	59,000	172,000	95,000	76,000
Stock Options
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Number of antidilutive common stock equivalents and stock options excluded from diluted earnings per share computation (in shares)	221	0	62,000	0