Interest on deferred compensation amounts.

No definition available.

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- Definition

The amount of payment into the fund established for purposes of making future disbursements to the individual in accordance with the terms and understanding of the deferred compensation arrangement.

+ References

No definition available.

+ Details

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- Definition

Aggregate carrying value as of the balance sheet date of the liabilities for all deferred compensation arrangements. Represents currently earned compensation under compensation arrangements that is not actually paid until a later date.

+ References

No definition available.

+ Details

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- Definition

Amount of contributions made by the employer to defined benefit plans.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (d)(5)(ii)
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Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 60
-Section 35
-Paragraph 123
-Subparagraph B
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Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
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-URI http://asc.fasb.org/extlink&oid=64937038&loc=d3e12551-114930

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-Publisher FASB
-Name Accounting Standards Codification
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-Section 50
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-Subparagraph (d)(5)(iv)(01)
-URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e1928-114920

+ Details

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- Definition

The amount of the cost recognized during the period for defined contribution plans.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 70
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=49170846&loc=d3e28014-114942

+ Details

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Period Type:	duration

- Definition

Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan.

+ References

No definition available.

+ Details

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- Definition

Maximum percentage of employee gross pay the employee may contribute to a defined contribution plan.

+ References

No definition available.

+ Details

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Note 14 - Employee Benefit Plans (Details Textual) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent	4.50%
Defined Contribution Plan, Cost Recognized	$ 322,575	$ 297,826	$ 650,016
Deferred Compensation Liability, Current and Noncurrent	10,389,326	8,875,025	7,503,692	$ 6,224,368
Deferred Compensation Arrangement with Individual, Employer Contribution	744,168	693,656	628,589
Minimum [Member] \| Certain Executive Officers [Member]
Deferred Compensation Arrangement with Individual, Employer Contribution	$ 8,000
Interest on Deferred Compensation Amounts	4.00%
Maximum [Member] \| Certain Executive Officers [Member]
Deferred Compensation Arrangement with Individual, Employer Contribution	$ 25,000
Interest on Deferred Compensation Amounts	12.00%
Supplemental Executive Retirement Plans [Member]
Deferred Compensation Liability, Current and Noncurrent	$ 4,093,355	3,934,605
Defined Benefit Plan, Contributions by Employer	$ 163,825	163,824	$ 117,000
Certain Management Officers [Member]s [Member] \| Minimum [Member]
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay	4.00%
Interest on Deferred Compensation Amounts	4.00%
Certain Management Officers [Member]s [Member] \| Maximum [Member]
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay	10.00%
Interest on Deferred Compensation Amounts	8.00%
Agreements with Certain Management and Executive Officers [Member]
Deferred Compensation Liability, Current and Noncurrent	$ 10,389,326	$ 8,875,025
First 3% of Employees Wages [Member]
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay	100.00%
Match at 100% [Member]
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent	3.00%
From 4% to 4.5% of Employees Wages [Member]
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay	50.00%
Matched at 50% [Member]
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent	3.00%