Stock-Based Compensation - Summary of Restricted Awards Activity (Details) - RSUs shares in Thousands	12 Months Ended
	Dec. 31, 2016 $ / shares shares
Number of Units
Beginning Balance (in shares) | shares	6,737
Granted (in shares) | shares	3,296
Vested (in shares) | shares	(4,111)
Forfeited (in shares) | shares	(359)
Ending Balance (in shares) | shares	5,563
Weighted- Average Grant date Fair Value
Beginning Balance (in dollars per share) | $ / shares	$ 11.29
Granted (in dollars per share) | $ / shares	10.86
Vested (in dollars per share) | $ / shares	10.99
Forfeited (in dollars per share) | $ / shares	11.32
Ending Balance (in dollars per share) | $ / shares	$ 11.25