ACQUISITIONS - Pro Forma Financial Information (Details) - Level One $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2022 USD ($) $ / shares
Business Acquisition [Line Items]
Total revenue (net interest income plus other income)	$ 654,313
Net income	221,631
Net income available to common stockholders	$ 219,756
Earnings per common share:
Basic (in dollars per share) | $ / shares	$ 3.72
Diluted (in dollars per share) | $ / shares	$ 3.70