BASIS OF PRESENTATION AND ACCOUNTING POLICIES - Narrative (Details) $ in Thousands	Jun. 30, 2023 USD ($) branch	Mar. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Jun. 30, 2022 USD ($)	Mar. 31, 2022 USD ($)	Jan. 01, 2022 USD ($)	Dec. 31, 2021 USD ($)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Number of branches operated | branch	164
Restricted cash	$ 0		$ 0
Reduction to allowance for credit losses	(272,071)	$ (242,658)	(205,677)	$ (172,642)	$ (161,251)		$ (167,582)
Increase to retained earnings	$ 1,414,742		$ 1,311,258
Cumulative Effect, Period of Adoption, Adjusted Balance
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Reduction to allowance for credit losses						$ 1,700
Increase to retained earnings						$ 1,300