Quarterly report pursuant to Section 13 or 15(d)

Subsequent Events - Additional Information (Detail)

v2.4.0.8
Subsequent Events - Additional Information (Detail) (USD $)
In Millions, except Share data, unless otherwise specified
6 Months Ended 1 Months Ended
Jun. 30, 2012
Jul. 31, 2013
Subsequent Event [Member]
Entity
Subsequent Event [Line Items]    
Cash paid for acquisition $ 57.5 $ 118.0
Number of shares issued for acquisition of company 1,927,113 763,272
Common stock value $ 37.3 $ 18.7
Number of business acquisitions   2