Quarterly report pursuant to sections 13 or 15(d)

Segment Information (Parenthetical) (Detail)

v2.4.0.6
Segment Information (Parenthetical) (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2012
Sep. 30, 2012
Segment Reporting Information [Line Items]    
Change in fair value of contingent consideration $ 909 $ 7,111