Employee Benefits and Retirement Plans - Pension Asset Allocation and Fair Value Measurement (Details) - USD ($)	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Equity	$ 3,236,166	$ 2,754,951
Equity, percentage	28.00%	23.00%
Fixed income	$ 4,268,825	$ 4,812,463
Fixed income, percentage	37.00%	41.00%
Total	$ 7,504,991	$ 7,567,414
Total, percentage	65.00%	64.00%
Certificates of deposit	$ 3,257,418	$ 3,260,260
Certificates of deposits, percentage	29.00%	27.00%
Cash and cash equivalent	$ 657,861	$ 1,062,004
Cash and cash equivalents, percentage	6.00%	9.00%
Total	$ 3,915,279	$ 4,322,264
Total, percentage	35.00%	36.00%
Fair value of plan assets	$ 11,420,270	$ 11,889,678	$ 11,819,296	$ 11,249,592
Fair value of plan assets, percentage	100.00%	100.00%
Level 1 [Member]
Equity	$ 3,236,166	$ 2,754,951
Fixed income	4,268,825	4,812,463
Total	7,504,991	7,567,414
Certificates of deposit	3,257,418	3,260,260
Cash and cash equivalent	657,861	1,062,004
Total	3,915,279	4,322,264
Fair value of plan assets	$ 11,420,270	$ 11,889,678

Estimated Fair Value Of Investment Of Assets

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Fair value of certificate deposits.

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Fixed Income Fair Value Disclosure

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Percentage Of Assets Estimated Fair Value In Investment

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Percentage Of Cash And Cash Equivalents Estimated Fair Value Portion

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Percentage Of Certificates Of Deposits Estimated Fair Value Portion

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- Definition

Percentage Of Defined Benefit Plan Fair Value Of Plan Assets

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Percentage Of Equity Portion In Investment Fair Value

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Percentage Of Fixed Income Portion In Investment Fair Value

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Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Cash
-URI http://asc.fasb.org/extlink&oid=6506951

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-Publisher FASB
-Name Accounting Standards Codification
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-URI http://asc.fasb.org/extlink&oid=6507016

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Assets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those non-benefit obligations may be considered as reductions of plan assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 30
-Section 35
-Paragraph 50
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- Definition

Fair value portion of investments accounted under the equity method.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 25
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=35740979&loc=d3e32014-111567

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Value of the investment at close of period. For schedules of investments that are categorized, the value would be aggregated by category. For investment in and advances to affiliates, if operations of any controlled companies are different in character from those of the company, group such affiliates within divisions and by type of activities.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 946
-SubTopic 320
-Section S99
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Percent of net assets at close of period. For schedules of investments that are categorized, each category has a percent of net assets for the aggregated value of the Investments in the category.

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