Investment Securities - Investments Reconciliation (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 923,485	$ 940,227
Unrealized Gains	550	125
Unrealized Losses	98,515	124,250
Fair Value	825,520	816,102
Federal agency obligations
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	5,012	5,014
Unrealized Gains	1	0
Unrealized Losses	0	37
Fair Value	5,013	4,977
U.S. treasury securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	45,955	45,942
Unrealized Gains	0	0
Unrealized Losses	2,045	2,691
Fair Value	43,910	43,251
Federal agency CMO
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	461,436	474,777
Unrealized Gains	203	3
Unrealized Losses	54,796	67,798
Fair Value	406,843	406,982
Federal agency MBS
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	23,892	24,172
Unrealized Gains	64	27
Unrealized Losses	2,776	3,178
Fair Value	21,180	21,021
Taxable municipal securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	287,421	287,435
Unrealized Gains	36	29
Unrealized Losses	37,173	48,187
Fair Value	250,284	239,277
Tax-exempt municipal securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	82,182	84,457
Unrealized Gains	246	66
Unrealized Losses	485	870
Fair Value	81,943	83,653
Corporate bonds
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	5,636	6,480
Unrealized Gains	0	0
Unrealized Losses	109	186
Fair Value	5,527	6,294
Subordinated corporate bonds
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	11,951	11,950
Unrealized Gains	0	0
Unrealized Losses	1,131	1,303
Fair Value	$ 10,820	$ 10,647

Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (b)
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Amount, before tax, of unrealized loss in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
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-Paragraph 2
-Subparagraph (c)
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Amortized cost excluding accrued interest, after allowance for credit loss, of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 30
-Section 45
-Paragraph 1
-URI https://asc.fasb.org/extlink&oid=124258926&loc=SL82898722-210454

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Amount excluding accrued interest, of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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