Condensed Pro-forma Financial Information, Excluding Discontinued Operations (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended	9 Months Ended
Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Business Acquisition, Pro Forma Information [Line Items]
Revenue	$ 51,234	$ 45,916	$ 144,338	$ 130,658
Net income (loss)	$ 485	$ 153	$ (4,193)	$ (6,090)
Net income (loss) per share attributable to common shareholders - basic and diluted	$ 0.01	$ 0.00	$ (0.11)	$ (0.16)

Business Acquisition, Pro Forma Earnings Per Share, Basic and Diluted

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- Details

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- Definition

The pro forma net Income or Loss for the period as if the business combination or combinations had been completed at the beginning of a period.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (h)(2)-(3)

-URI http://asc.fasb.org/extlink&oid=7659399&loc=d3e1392-128463

+ Details

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- Definition

The pro forma revenue for a period as if the business combination or combinations had been completed at the beginning of the period.

+ References

+ Details

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