The amount of accounts receivable due from brokers in connection to the sale of securities.

No definition available.

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- Definition

The aggregate depreciation from amortized cost basis as a percent.

+ References

No definition available.

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- Definition

Number of issuers of debt securities.

+ References

No definition available.

+ Details

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- Definition

Number of securities.

+ References

No definition available.

+ Details

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- Definition

Represents the number of states investments are held in.

+ References

No definition available.

+ Details

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- Definition

The percentage of the companies investment portfolio by type of investment.

+ References

No definition available.

+ Details

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Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Number of investment positions in available-for-sale investments in a continuous unrealized loss position for which an other-than-temporary impairment (OTTI) has not been recognized in the income statement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 6
-Subparagraph (b)(3)
-URI http://asc.fasb.org/extlink&oid=73527792&loc=d3e27290-111563

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- Definition

Number of investment positions in available-for-sale investments that have been in a continuous unrealized loss position for greater than or equal to a year for which an other-than-temporary impairment (OTTI) has not been recognized in the income statement.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
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- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 18
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- Definition

The difference between the carrying value and the sale price of an investment. A gain would be recognized when the sale price of the investment is greater than the carrying value of the investment. This element refers to the Gain included in earnings and not to the cash proceeds of the sale.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The amount by which the fair value of an investment is less than the amortized cost basis or carrying amount of that investment at the balance sheet date and the decline in fair value is deemed to be other than temporary, before considering whether or not such amount is recognized in earnings or other comprehensive income.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
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-Paragraph 34
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- Definition

Amount of investments classified as other.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
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-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

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Balance Type:	debit
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- Details

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Note 2 - Investment Securities (Details Textual)	1 Months Ended	3 Months Ended		9 Months Ended		12 Months Ended
Note 2 - Investment Securities (Details Textual)	Sep. 30, 2016 USD ($)	Sep. 30, 2016 USD ($)	Sep. 30, 2015 USD ($)	Sep. 30, 2016 USD ($)	Sep. 30, 2015 USD ($)	Dec. 31, 2015 USD ($)
Equity Securities [Member]
Percentage of Investment Portfolio	1.00%	1.00%		1.00%		1.00%
Other than Temporary Impairment Losses, Investments		$ 0	$ 0
Debt Securities [Member]
Other than Temporary Impairment Losses, Investments				$ 0	$ 0
General Obligation Bonds [Member] \| Municipal Bonds [Member] \| Aggregate Fair Value Exceeding 5 Million [Member]
Number of States Investments Held in	4	4		4		4
General Obligation Bonds [Member] \| Municipal Bonds [Member] \| Minimum [Member]
Other Investments	$ 5,000,000	$ 5,000,000		$ 5,000,000		$ 5,000,000
General Obligation Bonds [Member] \| Municipal Bonds [Member]
Number of Issuers	114	114		114		82
Other Investments	$ 115,800,000	$ 115,800,000		$ 115,800,000		$ 67,800,000
Number of States Investments Held in	24	24		24		19
General Obligation Bonds [Member] \| Stockholders' Equity, Total [Member] \| Credit Concentration Risk [Member]
Concentration Risk, Percentage				0.00%		0.00%
Revenue Bonds [Member] \| Municipal Bonds [Member] \| Aggregate Fair Value Exceeding 5 Million [Member]
Number of States Investments Held in	5	5		5		4
Revenue Bonds [Member] \| Municipal Bonds [Member] \| Minimum [Member]
Other Investments	$ 5,000,000	$ 5,000,000		$ 5,000,000		$ 5,000,000
Revenue Bonds [Member] \| Municipal Bonds [Member]
Number of Issuers	112	112		112		92
Other Investments	$ 249,300,000	$ 249,300,000		$ 249,300,000		$ 214,400,000
Number of States Investments Held in	13	13		13		9
Revenue Bonds [Member] \| Stockholders' Equity, Total [Member] \| Credit Concentration Risk [Member]
Concentration Risk, Percentage				0.00%		0.00%
Number of Securities	526	526		526
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions	92	92		92
Aggregate Depreciation from Amortized Cost Basis, Percent				1.00%
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Greater than or Equal to One Year	17	17		17
Accounts Receivable, Sale of Securities, from Broker	$ 32,100,000	$ 32,100,000		$ 32,100,000
Gain on Sale of Investments	$ 4,010,877	$ 4,281,828	$ 102,766	$ 4,815,373	$ 672,317