INVESTMENTS - Schedule of Held To Maturity Credit Quality Indicator (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Investment securities held-to-maturity, net	$ 1,064,188	$ 90,646
FNMA MBS
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Investment securities held-to-maturity, net	931,421
FNMA MBS | A+ rated or higher
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Investment securities held-to-maturity, net	0
FNMA MBS | Not rated
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Investment securities held-to-maturity, net	931,421
State and political subdivisions
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Investment securities held-to-maturity, net	132,267	90,146
State and political subdivisions | A+ rated or higher
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Investment securities held-to-maturity, net	132,267	90,146
State and political subdivisions | Not rated
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Investment securities held-to-maturity, net	0	0
Foreign bonds
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Investment securities held-to-maturity, net	500	500
Foreign bonds | A+ rated or higher
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Investment securities held-to-maturity, net	500	500
Foreign bonds | Not rated
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Investment securities held-to-maturity, net	$ 0	$ 0