XML 39 R36.htm IDEA: XBRL DOCUMENT v2.4.0.6
Summary of Restricted Stock Activity (Detail) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Restricted stock, Shares, Beginning Balance 1,771,664 1,817,745
Restricted stock, Shares, Vested (111,646) (70,206)
Restricted stock, Shares, Cancellations (16,030) (2,940)
Restricted stock, Shares, Ending Balance 1,643,988 1,744,599
Restricted stock, Fair Market Value at Date of Grant, Beginning Balance $ 41,522 $ 40,655
Restricted stock, Vested, Fair Market Value at Date of Grant (2,957) (2,007)
Restricted stock, Cancellations, Fair Market Value at Date of Grant (365) (60)
Restricted stock, Fair Market Value at Date of Grant, Ending Balance $ 38,200 $ 38,588