The aggregate depreciation from amortized cost basis as a percent.

No definition available.

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- Definition

Number of issuers of debt securities.

+ References

No definition available.

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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.

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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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- 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.

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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
-URI http://asc.fasb.org/extlink&oid=64851502&loc=d3e6351-108592

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 20
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-Name Accounting Standards Codification
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-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 21
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=73719730&loc=d3e13537-108611

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- 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)
-URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 35
-Paragraph 34
-URI http://asc.fasb.org/extlink&oid=27723805&loc=d3e25351-111560

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- Definition

Amount of investments classified as other.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.12)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03.1(f,g))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

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Note 2 - Investment Securities (Details Textual)	3 Months Ended		6 Months Ended		12 Months Ended
Note 2 - Investment Securities (Details Textual)	Jun. 30, 2016 USD ($)	Jun. 30, 2015 USD ($)	Jun. 30, 2016 USD ($)	Jun. 30, 2015 USD ($)	Dec. 31, 2015 USD ($)
Equity Securities [Member]
Percentage of Investment Portfolio	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
Stockholders' Equity, Total [Member] \| Credit Concentration Risk [Member] \| General Obligation Bonds [Member]
Concentration Risk, Percentage			0.00%		0.00%
Stockholders' Equity, Total [Member] \| Credit Concentration Risk [Member] \| Revenue Bonds [Member]
Concentration Risk, Percentage			0.00%		0.00%
General Obligation Bonds [Member] \| Municipal Bonds [Member] \| Aggregate Fair Value Exceeding 5 Million [Member]
Number of States Investments Held in	4		4		4
General Obligation Bonds [Member] \| Municipal Bonds [Member] \| Minimum [Member]
Other Investments	$ 5,000,000		$ 5,000,000		$ 5,000,000
General Obligation Bonds [Member] \| Municipal Bonds [Member]
Number of Issuers	77		77		82
Other Investments	$ 69,000,000		$ 69,000,000		$ 67,800,000
Number of States Investments Held in	19		19		19
Revenue Bonds [Member] \| Municipal Bonds [Member] \| Aggregate Fair Value Exceeding 5 Million [Member]
Number of States Investments Held in	4		4		4
Revenue Bonds [Member] \| Municipal Bonds [Member] \| Minimum [Member]
Other Investments	$ 5,000,000		$ 5,000,000		$ 5,000,000
Revenue Bonds [Member] \| Municipal Bonds [Member]
Number of Issuers	99		99		92
Other Investments	$ 239,100,000		$ 239,100,000		$ 214,400,000
Number of States Investments Held in	9		9		9
Number of Securities	447		447
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions	30		30
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