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Employee Benefit Plans (Details Textual) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2008
Employee Benefit Plans (Textual) [Abstract]
Employer contribution	$ 766,000	$ 1,005,000
Return on pension plan assets	7.00%
Employee Benefit Plans (Additional Textual) [Abstract]
Amortized from accumulated other comprehensive income	79,000
Net accumulated actuarial net loss	(458,000)	2,240,000
Past annual returns	11.40%	0.10%	12.40%	22.00%	(32.60%)
Expected Expense to incur	1,144,000	1,224,000
Percentage of equity securities in long-term investment target mix	70.00%
Percentage of fixed income in long-term investment target mix	30.00%
Low-cost equity index funds	37.00%	37.00%
Profit-sharing plan [Member]
Employee Benefit Plans (Textual) [Abstract]
Eligible employee contributions	3.00%
Defined benefit plan contributions by employer percent	6.00%
Pension plans, defined benefit [Member]
Employee Benefit Plans (Textual) [Abstract]
Employer contribution	766,000	238,000
Minimum required contribution	$ 665,000
Return on pension plan assets	7.00%	7.00%	7.00%

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- Definition

Actual rate of return on plan assets.

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- Definition

Defined benefit plan contributions by employer percent.

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- Definition

Defined benefit plan expected expenses.

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- Definition

Defined benefit plan fixed income securities.

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Defined benefits plan equity securities.

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- Definition

Amount of gain (loss) from a decision to temporarily deviate from the substantive plan, or from a change in benefit obligation or plan asset value from changes in actuarial assumptions, for example, but not limited to, interest, mortality, employee turnover or salary scale.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 30

-Glossary Gain or Loss

-URI http://asc.fasb.org/extlink&oid=6514294



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- Definition

The aggregate amount in accumulated other comprehensive income expected to be recognized as a component of net periodic benefit cost over the fiscal year that follows the most recent annual statement of financial position presented, including the net gain (loss), net prior service cost or credit, and net transition asset or obligation.

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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- Definition

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.

+ References

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-SubTopic 20

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-Paragraph 1

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- Definition

The increase in the fair value of plan assets from contributions made by the employer.

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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 in the current remaining fiscal period. 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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- Definition

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

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Percentage rate that is indicative of an expected degree of movement against a base line index, and which is included in determining the amount of the specified guaranteed benefit obligation as of the balance sheet date.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

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