The compensation expense recognized during the period pertaining to the deferred compensation arrangement.

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-Publisher AICPA

-Name Accounting Principles Board Opinion (APB)

-Number 12

-Paragraph 6, 7

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-Publisher FASB

-Name Accounting Standards Codification

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-SubTopic 10

-Section 50

-Paragraph 1

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-Section 30

-Paragraph 1

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The interest rate used to adjust for the time value of money.

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-Name Statement of Financial Accounting Standard (FAS)

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An assumption as to the rate of return on plan assets reflecting the average rate of earnings expected on the funds invested or to be invested to provide for the benefits included in the benefit obligation.

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-Glossary Expected Long-Term Rate of Return on Plan Assets

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The employer's best estimate, as soon as it can be reasonably determined, of contributions expected to be paid to the plan during the next fiscal year beginning after the date of the latest statement of financial position. Estimated contributions may be presented in the aggregate combining (1) contributions required by funding regulations or laws, (2) discretionary contributions, and (3) noncash contributions.

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Target allocation of investments of this type to total plan assets presented on a weighted average basis.

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Amount of expense reversal.

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Employee hire date no longer eligible for noncontributory retirement plan.

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Maturity period of fixed income investments.

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Retirement Plans and Other Postretirement Benefits (Details Textual) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Retirement Plans and Other Postretirement Benefits (Additional Textual) [Abstract]
Employee Hire Date No Longer Eligible for Noncontributory Retirement Plan	Dec. 08, 2009
Equity [Member]
Retirement Plans and Other Postretirement Benefits (Textual) [Abstract]
Investment allocation strategy to achieve the overall expected long-term rate of return	60.00%
Debt [Member]
Retirement Plans and Other Postretirement Benefits (Textual) [Abstract]
Investment allocation strategy to achieve the overall expected long-term rate of return	40.00%
Minimum [Member]
Retirement Plans and Other Postretirement Benefits (Textual) [Abstract]
Fixed income investments maturities range	1 year
Maximum [Member]
Retirement Plans and Other Postretirement Benefits (Textual) [Abstract]
Fixed income investments maturities range	10 years
Deferred Salary Savings Plan [Member]
Retirement Plans and Other Postretirement Benefits (Textual) [Abstract]
Deferred compensation expense	$ 667	$ 639	$ 588
Supplemental non-Qualified Pension Plan (SNQPP) [Member]
Retirement Plans and Other Postretirement Benefits (Textual) [Abstract]
Deferred compensation expense	531	463	88
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	3.96%
Reversal of accrued expense		467
Retirement Plan [Member]
Retirement Plans and Other Postretirement Benefits (Textual) [Abstract]
Expected employer contributions for next fiscal year	40
Overall expected long term rate of return	8.00%
Other Post Retirement Benefits [Member]
Retirement Plans and Other Postretirement Benefits (Textual) [Abstract]
Expected employer contributions for next fiscal year	$ 82
Overall expected long term rate of return