XML 93 R60.htm IDEA: XBRL DOCUMENT v2.4.0.6
Earnings (Loss) Before Income Taxes Composition in Each Tax Jurisdiction (Detail) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Income Taxes [Line Items]      
United States $ 72,156 $ 76,196 $ 275,685
Canada (1,236)    
Earnings (loss) before income taxes $ 70,920 $ 76,196 $ 275,685