Derivatives - Derivatives Not Designated as Hedging Instruments - Interest Rate Contracts (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Derivative [Line Items]
Derivative assets - Fair value	$ 708,284	$ 484,184
Derivative liabilities - Fair value	762,569	390,171
Derivatives not designated as hedging instruments
Derivative [Line Items]
Notional Amount	20,346,090	19,522,661
Derivative assets - Fair value	704,933	484,184
Derivative liabilities - Fair value	762,473	389,889
Derivatives not designated as hedging instruments \| Interest rate contracts
Derivative [Line Items]
Notional Amount	17,570,112	17,575,420
Derivative assets - Fair value	260,740	240,222
Derivative liabilities - Fair value	359,578	179,905
Derivatives not designated as hedging instruments \| Financial Counterparty \| Interest rate contracts
Derivative [Line Items]
Notional Amount	8,830,000	8,800,000
Interest rate contracts \| Derivatives not designated as hedging instruments \| Customer Counterparty \| Purchased options
Derivative [Line Items]
Notional Amount	0
Derivative assets - Fair value	0
Derivative liabilities - Fair value	0
Interest rate contracts \| Derivatives not designated as hedging instruments \| Customer Counterparty \| Written options
Derivative [Line Items]
Notional Amount	1,481,552	1,118,074
Derivative assets - Fair value	0	0
Derivative liabilities - Fair value	19,760	2,148
Interest rate contracts \| Derivatives not designated as hedging instruments \| Customer Counterparty \| Sold collars and corridors
Derivative [Line Items]
Notional Amount	187,168	194,181
Derivative assets - Fair value	9	1,272
Derivative liabilities - Fair value	5,040	642
Interest rate contracts \| Derivatives not designated as hedging instruments \| Customer Counterparty \| Swaps
Derivative [Line Items]
Notional Amount	7,069,901	7,460,836
Derivative assets - Fair value	8,482	211,727
Derivative liabilities - Fair value	326,853	39,650
Interest rate contracts \| Derivatives not designated as hedging instruments \| Customer Counterparty \| Interest rate contracts
Derivative [Line Items]
Notional Amount	8,738,621	8,773,091
Derivative assets - Fair value	8,491	212,999
Derivative liabilities - Fair value	351,653	42,440
Interest rate contracts \| Derivatives not designated as hedging instruments \| Financial Counterparty \| Purchased options
Derivative [Line Items]
Notional Amount	1,513,842	1,118,074
Derivative assets - Fair value	20,933	2,159
Derivative liabilities - Fair value	0	0
Interest rate contracts \| Derivatives not designated as hedging instruments \| Financial Counterparty \| Written options
Derivative [Line Items]
Notional Amount	32,290
Derivative assets - Fair value	0
Derivative liabilities - Fair value	1,076
Interest rate contracts \| Derivatives not designated as hedging instruments \| Financial Counterparty \| Collars and corridors
Derivative [Line Items]
Notional Amount	187,168	194,181
Derivative assets - Fair value	5,071	646
Derivative liabilities - Fair value	9	1,275
Interest rate contracts \| Derivatives not designated as hedging instruments \| Financial Counterparty \| Swaps
Derivative [Line Items]
Notional Amount	7,098,191	7,490,074
Derivative assets - Fair value	226,245	24,418
Derivative liabilities - Fair value	6,840	136,190
Interest rate contracts \| Derivatives not designated as hedging instruments \| Financial Counterparty \| Interest rate contracts
Derivative [Line Items]
Notional Amount	8,831,491	8,802,329
Derivative assets - Fair value	252,249	27,223
Derivative liabilities - Fair value	$ 7,925	$ 137,465

Fair value, before effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and elected not to be offset.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 50
-Paragraph 3
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 55
-Paragraph 22
-URI https://asc.fasb.org/extlink&oid=99393222&loc=SL20226052-175313

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- Definition

Fair value, before effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities not subject to a master netting arrangement and elected not to be offset.

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No definition available.

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Nominal or face amount used to calculate payment on derivative.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1B
-URI https://asc.fasb.org/extlink&oid=125515794&loc=SL5580258-113959

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1A
-Subparagraph (d)
-URI https://asc.fasb.org/extlink&oid=125515794&loc=SL5579245-113959

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