Employee Benefit Plan (Details) (USD $)	3 Months Ended
Mar. 31, 2013	Mar. 31, 2012
Employee Benefit Plan (Textual) [Abstract]
Maximum tax deferred contributed by employees	$ 17,500
Portion of matching eligible compensation contributed to the plan by employer, First	100.00%
Percentage of eligible compensation contributed to the plan by employees, First	3.00%
Portion of matching eligible compensation contributed to the plan by employer, Second	50.00%
Percentage of eligible compensation contributed to the plan by employees, Second	2.00%
Company's contributions to the plan	$ 167,000	$ 136,000

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Maximum tax deferred contributed by employees.

+ References

No definition available.

+ Details

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- Definition

Percentage of matching contribution in relation to specified eligible contribution one.

+ References

No definition available.

+ Details

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- Definition

Percentage of matching contribution in relation to specified eligible contribution two.

+ References

No definition available.

+ Details

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- Definition

Percentage of specified eligible contribution by employee one.

+ References

No definition available.

+ Details

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- Definition

Percentage of specified eligible contribution by employee two.

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No definition available.

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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

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