Securities (Amortized Cost and Fair Value of Debt Securities Held to Maturity) (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Schedule of Held-to-maturity Securities [Line Items]
Securities Held to Maturity, Gross Amortized Cost	$ 2,866,348	$ 1,565,751
Securities Held to Maturity, Gross Unrealized Gains	23	68,124
Securities Held to Maturity, Gross Unrealized Losses	260,291	2,393
Securities Held to Maturity, Fair Value	2,606,080	1,631,482
U.S. Treasury And Government Agency Securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Securities Held to Maturity, Gross Amortized Cost	407,097	14,857
Securities Held to Maturity, Gross Unrealized Losses	48,703	20
Securities Held to Maturity, Fair Value	358,394	14,837
Municipal Obligations [Member]
Schedule of Held-to-maturity Securities [Line Items]
Securities Held to Maturity, Gross Amortized Cost	701,353	621,405
Securities Held to Maturity, Gross Unrealized Gains	23	37,941
Securities Held to Maturity, Gross Unrealized Losses	37,888	205
Securities Held to Maturity, Fair Value	663,488	659,141
Residential Mortgage-Backed Securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Securities Held to Maturity, Gross Amortized Cost	755,206	268,907
Securities Held to Maturity, Gross Unrealized Gains		682
Securities Held to Maturity, Gross Unrealized Losses	81,840	1,499
Securities Held to Maturity, Fair Value	673,366	268,090
Commercial Mortgage-Backed Securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Securities Held to Maturity, Gross Amortized Cost	954,498	603,156
Securities Held to Maturity, Gross Unrealized Gains		28,679
Securities Held to Maturity, Gross Unrealized Losses	89,285	669
Securities Held to Maturity, Fair Value	865,213	631,166
Collateralized Mortgage Obligations [Member]
Schedule of Held-to-maturity Securities [Line Items]
Securities Held to Maturity, Gross Amortized Cost	48,194	57,426
Securities Held to Maturity, Gross Unrealized Gains		822
Securities Held to Maturity, Gross Unrealized Losses	2,575
Securities Held to Maturity, Fair Value	$ 45,619	$ 58,248

Amount of accumulated unrecognized gain on investment in debt security measured at amortized cost (held-to-maturity).

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- Definition

Amount of accumulated unrealized loss on investment in debt security measured at amortized cost (held-to-maturity).

+ References

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- Definition

Amount, before other-than-temporary impairment (OTTI) accretion, of investment in debt securities measured at amortized cost (held-to-maturity).

+ References

No definition available.

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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
-Subparagraph (aa)
-URI https://asc.fasb.org/extlink&oid=126970911&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 https://asc.fasb.org/extlink&oid=126897435&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 https://asc.fasb.org/extlink&oid=126970911&loc=SL120269820-111563

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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