Disclosure Of Fair Value Of Assets And Liabilities (Schedule Of Valuation Techniques And Significant Unobservable Assumptions) (Details)
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Sep. 30, 2021
item
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| Office Properties Held For Sale [Member] | Suburban [Member] | Valuation Technique, Discounted Cash Flow [Member] | Measurement Assumptions, Discount Rates [Member] |
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| Fair Value Measurement Inputs and Valuation Techniques [Line Items] |
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| Servicing Asset, Measurement Input |
0.10
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| Office Properties Held For Sale [Member] | Suburban [Member] | Valuation Technique, Discounted Cash Flow [Member] | Measurement Assumptions, Market Rental Rates Per Square Foot [Member] |
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| Fair Value Measurement Inputs and Valuation Techniques [Line Items] |
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| Servicing Asset, Measurement Input |
34.50
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| Office Properties Held For Sale [Member] | Suburban [Member] | Valuation Technique, Discounted Cash Flow [Member] | Minimum [Member] | Measurement Assumptions, Exit Capitalization Rates [Member] |
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| Fair Value Measurement Inputs and Valuation Techniques [Line Items] |
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| Servicing Asset, Measurement Input |
0.085
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| Office Properties Held For Sale [Member] | Suburban [Member] | Valuation Technique, Discounted Cash Flow [Member] | Maximum [Member] | Measurement Assumptions, Exit Capitalization Rates [Member] |
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| Fair Value Measurement Inputs and Valuation Techniques [Line Items] |
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| Servicing Asset, Measurement Input |
0.0925
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| Office Properties Held For Sale [Member] | Waterfront [Member] | Valuation Technique, Discounted Cash Flow [Member] | Measurement Assumptions, Discount Rates [Member] |
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| Fair Value Measurement Inputs and Valuation Techniques [Line Items] |
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| Servicing Asset, Measurement Input |
0.08
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| Office Properties Held For Sale [Member] | Waterfront [Member] | Valuation Technique, Discounted Cash Flow [Member] | Minimum [Member] | Measurement Assumptions, Market Rates Per Square Foot [Member] |
|
| Fair Value Measurement Inputs and Valuation Techniques [Line Items] |
|
| Servicing Asset, Measurement Input |
48.00
|
| Office Properties Held For Sale [Member] | Waterfront [Member] | Valuation Technique, Discounted Cash Flow [Member] | Maximum [Member] | Measurement Assumptions, Market Rates Per Square Foot [Member] |
|
| Fair Value Measurement Inputs and Valuation Techniques [Line Items] |
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| Servicing Asset, Measurement Input |
51.00
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| Land Holdings Held For Sale [Member] | Suburban [Member] | Valuation Technique, Consensus Pricing Model [Member] | Measurement Assumptions, Market Rates Per Square Foot [Member] |
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| Fair Value Measurement Inputs and Valuation Techniques [Line Items] |
|
| Servicing Asset, Measurement Input |
12.00
|
| Land Holdings Held For Sale [Member] | Suburban [Member] | Valuation Technique, Consensus Pricing Model [Member] | Minimum [Member] | Measurement Assumptions, Market Rates Per Square Foot [Member] |
|
| Fair Value Measurement Inputs and Valuation Techniques [Line Items] |
|
| Servicing Asset, Measurement Input |
43,000
|
| Land Holdings Held For Sale [Member] | Suburban [Member] | Valuation Technique, Consensus Pricing Model [Member] | Maximum [Member] | Measurement Assumptions, Market Rates Per Square Foot [Member] |
|
| Fair Value Measurement Inputs and Valuation Techniques [Line Items] |
|
| Servicing Asset, Measurement Input |
54,000
|
| Land Holdings Held For Sale [Member] | Waterfront [Member] | Valuation Technique, Consensus Pricing Model [Member] | Minimum [Member] | Measurement Assumptions, Market Rates Per Square Foot [Member] |
|
| Fair Value Measurement Inputs and Valuation Techniques [Line Items] |
|
| Servicing Asset, Measurement Input |
60,000
|
| Land Holdings Held For Sale [Member] | Waterfront [Member] | Valuation Technique, Consensus Pricing Model [Member] | Maximum [Member] | Measurement Assumptions, Market Rates Per Square Foot [Member] |
|
| Fair Value Measurement Inputs and Valuation Techniques [Line Items] |
|
| Servicing Asset, Measurement Input |
85,000
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