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Deferred Compensation (Narrative) (Details) - Former Officers [Member] - USD ($) | 12 Months Ended |
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Dec. 31, 2017 | Dec. 31, 2016
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items] |  |
Minimum period of deferred compensation benefits (years) | 10 years |
Minimum deferred compensation benefit age (years) | 65 years |
Estimate of Fair Value, Fair Value Disclosure [Member] |  |
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items] |  |
Present value of vested future deferred compensation payments | $ 159,080 | $ 171,015

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- Definition Deferred Compensation Arrangement with Individual, Allocated Share-based Compensation Expense, Minimum Benefit Age + References No definition available. + Details
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- Definition Deferred Compensation Arrangement with Individual, Minimum Contractual Term + References No definition available. + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + 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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- Details
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- Details
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