Commitments, Contingencies And Guarantees (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020
Notional amount of underlying swaps	$ 2,916,181	$ 3,015,189
Financial Standby Letter of Credit [Member]
Carrying value of the guarantee obligations, liability	2,900
Commitments outstanding	418,328	$ 357,087
State Tax Credits [Member]
Purchases of state tax credits	113,500
Sales of state tax credits	108,100
Purchase Obligation, to be Paid, Year One	186,000
Outstanding purchase commitments expected to fund	306,500
Risk Participation Agreement [Member]
Carrying value of the guarantee obligations, liability	277
Notional amount of underlying swaps	$ 366,400
Risk Participation Agreement [Member] \| Minimum [Member]
Risk Participation Agreements, Term	2 years
Risk Participation Agreement [Member] \| Maximum [Member]
Risk Participation Agreements, Term	15 years
Office Building
Outstanding purchase commitments expected to fund	$ 106,700
Lessor, Operating Lease, Lease Not yet Commenced, Term of Contract	15 years
Anchor Tenant Percent of Building Leased	50.00%
Purchase Commitment Fulfilled	$ 55,200

Anchor Tenant Percent of Building Leased

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Purchase Commitment Fulfilled

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- Definition

Risk Participation Agreements, Term

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- Definition

Purchases of state tax credits arising from third party property redevelopment, mainly to be resold to third parties.

+ References

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- Definition

Sales of state tax credits arising from third party property redevelopment. These were primarily purchased by the Company with the purpose of reselling to third parties.

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No definition available.

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- Definition

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
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The current carrying amount of the liability for the freestanding or embedded guarantor's obligations under the guarantee or each group of similar guarantees.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition

Maximum potential amount of future payments (undiscounted) the guarantor could be required to make under the guarantee or each group of similar guarantees before reduction for potential recoveries under recourse or collateralization provisions.

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Term of lessor's operating lease not yet commenced, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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- Definition

Minimum amount to be expended to satisfy the terms of arrangements in which the entity has agreed to expend funds to procure goods or services, excluding long-term purchase commitments or unconditional purchase obligations.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Amount of purchase arrangement to be paid in next fiscal year following current fiscal year. Includes, but is not limited to, recorded and unrecorded purchase obligations, long-term purchase commitment, and short-term purchase commitment. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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