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Investments In Securities Investments In Securities (Schedule of Variable Interest Entities) (Details) - Other investments	Sep. 30, 2017 USD ($)
Variable Interest Entity [Line Items]
Carrying Value	$ 9,512,614
Estimated Fair Value	9,955,704
Maximum Potential Loss	17,925,000
Tax credit LPs
Variable Interest Entity [Line Items]
Carrying Value	905,179
Estimated Fair Value	905,179
Maximum Potential Loss	1,325,000
Real estate LLCs or LPs
Variable Interest Entity [Line Items]
Carrying Value	4,907,741
Estimated Fair Value	5,438,088
Maximum Potential Loss	7,200,000
Small business investment LPs
Variable Interest Entity [Line Items]
Carrying Value	3,699,694
Estimated Fair Value	3,612,437
Maximum Potential Loss	$ 9,400,000

X

- Definition

Estimated fair value amount of the assets in the reporting entity's statement of financial position that relate to the reporting entity's variable interest in the Variable Interest Entity (VIE), where the reporting entity is not the VIE's primary beneficiary.

+ References

No definition available.

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- Definition

The reporting entity's maximum amount of exposure to loss as a result of its involvement with the Variable Interest Entity (VIE).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph b
-URI http://asc.fasb.org/extlink&oid=77990344&loc=d3e5728-111685

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 50
-Paragraph 6
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=77990344&loc=d3e5747-111685

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- Definition

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+ References

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- Definition

Carrying amount of the assets in the reporting entity's statement of financial position that relate to the reporting entity's variable interest in the Variable Interest Entity (VIE), where the reporting entity is not the VIE's primary beneficiary.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph a
-URI http://asc.fasb.org/extlink&oid=77990344&loc=d3e5728-111685

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