XML 13 R39.htm IDEA: XBRL DOCUMENT v2.4.0.6
Stockholders' Equity (Schedule Of Information Regarding Share-Based Payment Arrangements) (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2012
Mar. 31, 2011
Stockholders' Equity [Abstract]    
Proceeds from stock options exercised      
Excess tax shortfall related to exercise of stock options and vesting of restricted stock (740) (933)
Intrinsic value of stock options exercised    [1]    [1]
[1] Intrinsic value of stock options exercised is estimated by taking the difference between the Company's closing stock price on the date of exercise and the exercise price, multiplied by the number of options exercised for each option holder and then aggregated.