Quarterly report pursuant to Section 13 or 15(d)

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

v3.8.0.1
Benefit Plans - Summary of Restricted Stock Unit and Stock Award Activity (Details) - Restricted Stock Units (RSUs) and Performance Shares
shares in Thousands
3 Months Ended
Mar. 31, 2018
$ / shares
shares
Shares  
Nonvested as of beginning of period (in shares) | shares 31,323
Granted (in shares) | shares 5,049
Vested (in shares) | shares (150)
Forfeited (in shares) | shares (148)
Nonvested as of end of period (in shares) | shares 36,074
Grant Date Fair Value Per Share  
Nonvested as of beginning of period (in dollars per share) | $ / shares $ 4.54
Granted (in dollars per share) | $ / shares 6.02
Vested (in dollars per share) | $ / shares 3.98
Forfeited (in dollars per share) | $ / shares 4.95
Nonvested as of end of period (in dollars per share) | $ / shares $ 4.75