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Note R - Stock-Based Compensation (Detail) - (Table 4) (USD $)
9 Months Ended
Sep. 30, 2011
Sep. 30, 2010
Expected volatility47.3% to 48.7%47.2% to 52.4%
Risk-free interest rate0.61% to 1.78%1.08% to 2.16%
Expected life (in years)2.8 to 4.42.8 to 4.4
Expected dividend yield  
Weighted average fair value (in Dollars per share)$ 10.91$ 8.45