XML 30 R42.htm IDEA: XBRL DOCUMENT v2.4.0.6
Unaudited Pro Forma Consolidated Results of Operations (Detail) (USD $)
In Thousands, except Per Share data, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Business Acquisition, Pro Forma Information [Line Items]    
Revenue $ 2,929,813 $ 2,515,219
Net Income $ 58,991 $ 44,824
Earnings per share - basic $ 1.60 $ 1.20
Earnings per share - diluted $ 1.59 $ 1.20