Securities (Securities Held to Maturity with Unrealized Losses) (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Schedule of Held-to-maturity Securities [Line Items]
Held to maturity, Losses less than 12 months, Fair Value	$ 2,200,703	$ 332,659
Held to maturity, Losses less than 12 months, Gross Unrealized Losses	188,978	1,929
Held to maturity, Losses 12 months or longer, Fair Value	401,589	11,837
Held to maturity, Losses 12 months or longer, Gross Unrealized Losses	71,313	464
Held to maturity, Total, Fair Value	2,602,292	344,496
Held to maturity, Total, Gross Unrealized Losses	260,291	2,393
U.S. Treasury And Government Agency Securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Held to maturity, Losses less than 12 months, Fair Value	168,514	14,837
Held to maturity, Losses less than 12 months, Gross Unrealized Losses	19,895	20
Held to maturity, Losses 12 months or longer, Fair Value	189,879
Held to maturity, Losses 12 months or longer, Gross Unrealized Losses	28,808
Held to maturity, Total, Fair Value	358,393	14,837
Held to maturity, Total, Gross Unrealized Losses	48,703	20
Municipal Obligations [Member]
Schedule of Held-to-maturity Securities [Line Items]
Held to maturity, Losses less than 12 months, Fair Value	601,010	7,795
Held to maturity, Losses less than 12 months, Gross Unrealized Losses	21,670	205
Held to maturity, Losses 12 months or longer, Fair Value	58,691
Held to maturity, Losses 12 months or longer, Gross Unrealized Losses	16,218
Held to maturity, Total, Fair Value	659,701	7,795
Held to maturity, Total, Gross Unrealized Losses	37,888	205
Residential Mortgage-Backed Securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Held to maturity, Losses less than 12 months, Fair Value	574,671	253,661
Held to maturity, Losses less than 12 months, Gross Unrealized Losses	65,187	1,499
Held to maturity, Losses 12 months or longer, Fair Value	98,695
Held to maturity, Losses 12 months or longer, Gross Unrealized Losses	16,653
Held to maturity, Total, Fair Value	673,366	253,661
Held to maturity, Total, Gross Unrealized Losses	81,840	1,499
Commercial Mortgage-Backed Securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Held to maturity, Losses less than 12 months, Fair Value	810,889	56,366
Held to maturity, Losses less than 12 months, Gross Unrealized Losses	79,651	205
Held to maturity, Losses 12 months or longer, Fair Value	54,324	11,837
Held to maturity, Losses 12 months or longer, Gross Unrealized Losses	9,634	464
Held to maturity, Total, Fair Value	865,213	68,203
Held to maturity, Total, Gross Unrealized Losses	89,285	$ 669
Collateralized Mortgage Obligations [Member]
Schedule of Held-to-maturity Securities [Line Items]
Held to maturity, Losses less than 12 months, Fair Value	45,619
Held to maturity, Losses less than 12 months, Gross Unrealized Losses	2,575
Held to maturity, Total, Fair Value	45,619
Held to maturity, Total, Gross Unrealized Losses	$ 2,575

Amount of accumulated unrealized loss on investment in debt security measured at amortized cost (held-to-maturity), in continuous loss position for 12 months or longer.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 7
-URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27337-111563

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 6
-Subparagraph (a)(2)
-URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27290-111563

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

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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-SubTopic 10
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-Paragraph 7
-URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27337-111563

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