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Employee Benefit Plans (Details Textual) (USD $)	9 Months Ended	12 Months Ended	24 Months Ended
	Sep. 30, 2012	Dec. 31, 2011	Dec. 31, 2012
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]
Contributions to the defined benefit plan	$ 528,000	$ 238,000	$ 1,016,000
Minimum required contribution	$ 1,048,000

X

- Definition

Defined benefit plan contributions by employer percent.

+ References

No definition available.

+ Details

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X

- Details

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X

- Definition

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

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 132R

-Paragraph 5

-Subparagraph b

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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.



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (b)(3)

-URI http://asc.fasb.org/extlink&oid=21915506&loc=d3e1928-114920

+ Details

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Period Type:	duration

X

- Definition

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.

+ References

No definition available.

+ Details

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X

- 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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