Stock-Based Compensation - Summary of Restricted Awards Activity (Details) - RSUs shares in Thousands	3 Months Ended
	Mar. 31, 2017 $ / shares shares
Number of Units
Beginning Balance (in shares) | shares	5,563
Granted (in shares) | shares	800
Vested (in shares) | shares	(2,634)
Forfeited (in shares) | shares	(72)
Ending Balance (in shares) | shares	3,657
Weighted- Average Grant date Fair Value
Beginning Balance (in dollars per share) | $ / shares	$ 11.25
Granted (in dollars per share) | $ / shares	14.27
Vested (in dollars per share) | $ / shares	11.19
Forfeited (in dollars per share) | $ / shares	12.10
Ending Balance (in dollars per share) | $ / shares	$ 11.93