Quarterly report pursuant to Section 13 or 15(d)

Significant Accounting Policies - Effects of Prior Period Errors in Condensed Consolidated Statement of Cash Flows (Detail)

v2.4.0.8
Significant Accounting Policies - Effects of Prior Period Errors in Condensed Consolidated Statement of Cash Flows (Detail) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Net income $ 118,873 $ 107,931
Income taxes 23,097 16,720
As Previously Reported [Member]
    
Net income 118,856 108,162
Income taxes $ 23,114 $ 16,489