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SECURITIES - Schedule of Amortized Cost and Estimated Fair Value of Available for Sale (AFS) and Held to Maturity (HTM) Securities, Segregated by Contractual Maturity (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Available for sale, Amortized Cost
Within 1 year	$ 12,482
Over 1 year to 5 years	11,254
Over 5 years to 10 years	49,729
Over 10 years	48,473
Total bonds and obligations	121,938
Mortgage-backed securities	1,539,258
Amortized Cost	1,661,196	$ 1,881,813
Available for sale, Fair Value
Within 1 year	12,482
Over 1 year to 5 years	11,269
Over 5 years to 10 years	46,904
Over 10 years	45,819
Total bonds and obligations	116,474
Mortgage-backed securities	1,306,726
Fair Value	1,423,200	1,877,585
Held to maturity, Amortized Cost
Within 1 year	995
Over 1 year to 5 years	2,191
Over 5 years to 10 years	28,544
Over 10 years	237,423
Total bonds and obligations	269,153
Mortgage-backed securities	314,300
Amortized Cost	583,453	636,503
Held to maturity, Fair Value
Within 1 year	995
Over 1 year to 5 years	2,181
Over 5 years to 10 years	28,543
Over 10 years	214,308
Total bonds and obligations	246,027
Mortgage-backed securities	261,437
Fair Value	$ 507,464	$ 647,236

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Name:	us-gaap_HeldtomaturitySecuritiesDebtMaturitiesRollingYearSixThroughTenAmortizedCost
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Amount, after allowance for credit loss, of investment in debt security measured at amortized cost (held-to-maturity) with single maturity date and allocated without single maturity date, maturing in second through fifth rolling fiscal year following current statement of financial position date. For interim and annual periods when interim period is reported on rolling approach.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 5
-Subparagraph (f)(2)
-URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27232-111563

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 320
-Section 50
-Paragraph 3
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=126980459&loc=d3e62586-112803

+ Details

Name:	us-gaap_HeldtomaturitySecuritiesDebtMaturitiesRollingYearTwoThroughFiveAmortizedCost
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant