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Acquisitions of Businesses - Unaudited Proforma Net Revenue and Net Income from Continuing Operations (Detail) (USD $)
In Thousands, except Per Share data, unless otherwise specified
3 Months Ended
Mar. 31, 2013
Business Combinations [Abstract]  
Net revenues $ 65,461
Net income attributable to common shareholders from continuing operations $ 4,033
Earnings per share:  
Basic - net income attributable to common shareholders from continuing operations $ 0.33
Diluted - net income attributable to common shareholders from continuing operations $ 0.33
Shares used in computation:  
Basic - net income attributable to common shareholders from continuing operations 12,129
Diluted - net income attributable to common shareholders from continuing operations 12,144