FAIR VALUE - LEVEL 3 ASSETS MEASURED ON RECURRING BASIS (Details) - Recurring - Level 3 - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Opening Balance	$ 87,731	$ 36,423
Total gains or losses for the period - Included in other comprehensive income	(112)	(323)
Purchases, retentions, issues, sales and settlements:
Purchases/Retentions	1,712	3,250
Settlements	(7,652)	(397)
Closing balance	80,515	42,741
Change in unrealized gains or losses for the period included in earnings for assets held at the end of the reporting period	(1,164)	3,788
Included in earnings—Mortgage banking income
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Total gains or losses for the period - Included in earnings	(1,164)	3,788
Non-Agency MBS
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Opening Balance	67,615	18,332
Total gains or losses for the period - Included in other comprehensive income	(112)	(323)
Purchases, retentions, issues, sales and settlements:
Purchases/Retentions	0	0
Settlements	(7,652)	(397)
Closing balance	59,851	17,612
Change in unrealized gains or losses for the period included in earnings for assets held at the end of the reporting period	0	0
Non-Agency MBS | Included in earnings—Mortgage banking income
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Total gains or losses for the period - Included in earnings	0	0
Mortgage Servicing Rights
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Opening Balance	17,911	10,675
Total gains or losses for the period - Included in other comprehensive income	0	0
Purchases, retentions, issues, sales and settlements:
Purchases/Retentions	1,712	3,250
Settlements	0	0
Closing balance	18,438	12,130
Change in unrealized gains or losses for the period included in earnings for assets held at the end of the reporting period	(1,185)	(1,795)
Mortgage Servicing Rights | Included in earnings—Mortgage banking income
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Total gains or losses for the period - Included in earnings	(1,185)	(1,795)
Derivative Instruments, net
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Opening Balance	2,205	7,416
Total gains or losses for the period - Included in other comprehensive income	0	0
Purchases, retentions, issues, sales and settlements:
Purchases/Retentions	0	0
Settlements	0	0
Closing balance	2,226	12,999
Change in unrealized gains or losses for the period included in earnings for assets held at the end of the reporting period	21	5,583
Derivative Instruments, net | Included in earnings—Mortgage banking income
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Total gains or losses for the period - Included in earnings	$ 21	$ 5,583