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Investment Securities (Scheduled Maturities of Securities Available for Sale and Securities Held to Maturity) (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Investments [Abstract]
Debt securities available for sale, Due in one year or less, Amortized Cost	$ 5,550
Debt securities available for sale, Due from one to five years, Amortized Cost	86,194
Debt securities available for sale, Due after five years through ten years, Amortized Cost	152,838
Debt securities available for sale, Due after ten years, Amortized Cost	938,723
Securities available for sale, Amortized Cost	1,183,305	$ 1,184,835
Debt securities available for sale, Due in one year or less, Fair Value	5,535
Debt securities available for sale, Due from one to five years, Fair Value	83,372
Debt securities available for sale, Due after five years through ten years, Fair Value	141,476
Debt securities available for sale, Due after ten years, Fair Value	826,635
Debt securities available for sale, Fair Value	1,057,018	1,178,515
Debt securities held to maturity, Due in one year or less, Amortized Cost	35,543
Debt securities held to maturity, Due from one to five years, Amortized Cost	45,992
Debt securities held to maturity, Due after five years through ten years, Amortized Cost	39,273
Debt securities held to maturity, Due after ten years, Amortized Cost	84,130
Securities held to maturity, Amortized Cost	204,938	205,586
Debt securities held to maturity, Due in one year or less, Fair Value	35,602
Debt securities held to maturity, Due from one to five years, Fair Value	45,676
Debt securities held to maturity, Due after five years through ten years, Fair Value	38,008
Debt securities held to maturity, Due after ten years, Fair Value	76,165
Securities held to maturity, Fair Value	$ 195,451	$ 209,820

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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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