ACQUISITIONS - Narratives (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended
	Jul. 01, 2024	Dec. 31, 2024	Sep. 30, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Acquisitions
Goodwill		$ 100,026		$ 86,985	$ 86,985	$ 86,135
SimplyBank
Acquisitions
Price per share (in USD per share)	$ 718.38
Aggregate value of the transaction	$ 73,400	73,400	$ 73,400
Acquisition-related costs	1,700
Goodwill	13,000	$ 13,041	$ 10,310
Fair value of purchased financial assets with credit deterioration	1,700
Gross amount contractual amounts of receivable with credit deterioration	4,700
Contractual cash flow will not be collected	$ 3,000