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Stock Compensation - Schedule of Stock and Stock Unit Activity (Details) - Stock and stock units
9 Months Ended
Sep. 30, 2016
$ / shares
shares
Number of Shares  
Outstanding, beginning balance (in shares) | shares 4,493,054
Granted / awarded (in shares) | shares 3,708,892
Forfeited (in shares) | shares (2,767,526)
Vested or restrictions lapsed (in shares) | shares (1,986,124)
Outstanding, ending balance (in shares) | shares 3,448,296
Weighted Average Exercise Price Per Share  
Outstanding, beginning balance (in dollars per share) | $ / shares $ 8.64
Granted / awarded (in dollars per share) | $ / shares 6.64
Forfeited (in dollars per share) | $ / shares 7.58
Vested or restrictions lapsed (in dollars per share) | $ / shares 8.66
Outstanding, ending balance (in dollars per share) | $ / shares $ 7.34