Quarterly report pursuant to Section 13 or 15(d)

Benefit Plans - Summary of Restricted Stock Unit and Stock Award Activity (Details)

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Benefit Plans - Summary of Restricted Stock Unit and Stock Award Activity (Details) - Restricted Stock Units RSU and Stock Awards [Member] - $ / shares
shares in Thousands
9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Nonvested restricted stock unit activity, shares    
Nonvested, shares, beginning balance 11,575  
Granted, shares 8,447  
Vested, shares (2,446)  
Forfeited, shares (617)  
Nonvested, shares, ending balance 16,959  
Nonvested restricted stock unit activity, grant date fair value    
Nonvested, grant date fair value, beginning $ 3.47  
Granted, grant date fair value 3.91 $ 3.39
Vested, grant date fair value 3.49  
Forfeited, grant date fair value 3.59  
Nonvested, grant date fair value, ending $ 3.68