XML 70 R41.htm IDEA: XBRL DOCUMENT v2.4.0.6
Changes in Carrying Amount of Goodwill (Detail) (USD $)
In Thousands, unless otherwise specified
6 Months Ended
Jun. 30, 2012
Goodwill [Line Items]  
Balance as of December 31, 2011 $ 58,214
Acquisition 14,098
Adjustments related to purchase accounting (757)
Balance at June 30, 2012 $ 71,555