XML 48 R40.htm IDEA: XBRL DOCUMENT v2.4.0.6
Stock-Based Awards (Details 3) (Restricted Stock Awards [Member])
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Restricted Stock Awards [Member]
     
Summary of Restricted Shares Outstanding      
Restricted stock awards, beginning balance 1,311,371 2,158,509 4,430,123
Granted 1,209,114 561,526 554,011
Vested (1,209,121) (1,382,376) (2,772,125)
Forfeited (30,220) (26,288) (53,500)
Restricted stock awards, ending balance 1,281,144 1,311,371 2,158,509