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Investment Securities (Scheduled Maturities of Securities Available for Sale and Securities Held to Maturity) (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Investments [Abstract]
Debt securities available for sale, Due in one year or less, Amortized Cost	$ 1,469
Debt securities available for sale, Due from one to five years, Amortized Cost	64,526
Debt securities available for sale, Due after five years through ten years, Amortized Cost	178,918
Debt securities available for sale, Due after ten years, Amortized Cost	939,922
Securities available for sale, Amortized Cost	1,184,835	$ 607,665
Debt securities available for sale, Due in one year or less, Fair Value	1,479
Debt securities available for sale, Due from one to five years, Fair Value	66,843
Debt securities available for sale, Due after five years through ten years, Fair Value	182,096
Debt securities available for sale, Due after ten years, Fair Value	928,097
Debt securities available for sale, Fair Value	1,178,515	628,059
Debt securities held to maturity, Due in one year or less, Amortized Cost	35,419
Debt securities held to maturity, Due from one to five years, Amortized Cost	68,054
Debt securities held to maturity, Due after five years through ten years, Amortized Cost	19,209
Debt securities held to maturity, Due after ten years, Amortized Cost	82,904
Securities held to maturity, Amortized Cost	205,586	271,973
Debt securities held to maturity, Due in one year or less, Fair Value	35,700
Debt securities held to maturity, Due from one to five years, Fair Value	70,227
Debt securities held to maturity, Due after five years through ten years, Fair Value	19,414
Debt securities held to maturity, Due after ten years, Fair Value	84,479
Securities held to maturity, Fair Value	$ 209,820	$ 282,035

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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 next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 320
-Section 50
-Paragraph 3
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=123599081&loc=d3e62586-112803

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 5
-Subparagraph (f)(1)
-URI http://asc.fasb.org/extlink&oid=123581744&loc=d3e27232-111563

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- Definition

Fair value of investment in debt security measured at amortized cost (held-to-maturity).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 5
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-URI http://asc.fasb.org/extlink&oid=123581744&loc=d3e27232-111563

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(6))
-URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 5A
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=123581744&loc=SL120269820-111563

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- References

No definition available.

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