Stock-Based Compensation and Employee Benefit Plans (Summary of Option Activity) (Details) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2015 USD ($) $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Beginning Balance, Outstanding, Number of Options (shares) | shares	10,371,469
Granted, Number of Options (shares) | shares	1,611,617
Exercised, Number of Options (shares) | shares	(804,857)
Forfeited, Number of Options (shares) | shares	(430,878)
Expired, Number of Options (shares) | shares	(36,030)
Ending Balance, Outstanding, Number of Options (shares) | shares	10,711,321
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
Beginning Balance, Outstanding, Weighted-Average Exercise Price (in dollars per share) | $ / shares	$ 4.59
Granted, Weighted-Average Exercise Price (in dollars per share) | $ / shares	13.84
Exercised, Weighted-Average Exercise Price (in dollars per share) | $ / shares	1.24
Forfeited, Weighted-Average Exercise Price (in dollars per share) | $ / shares	7.42
Expired, Weighted-Average Exercise Price (in dollars per share) | $ / shares	6.19
Ending Balance, Outstanding, Weighted-Average Exercise Price (in dollars per share) | $ / shares	$ 6.16
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Outstanding, Weighted-Average Remaining Contractual Term	7 years 9 months 29 days
Outstanding, Aggregate Intrinsic Value | $	$ 53,012
Exercisable, Number of Options (shares) | shares	5,146,604
Exercisable, Weighted-Average Exercise Price (in dollars per share) | $ / shares	$ 3.18
Exercisable, Weighted-Average Remaining Contractual Term	7 years 1 month 2 days
Exercisable, Aggregate Intrinsic Value | $	$ 37,857
Vested or expected to vest, Number of Options (shares) | shares	10,393,562
Vested or expected to vest, Weighted-Average Exercise Price (in dollars per share) | $ / shares	$ 6.00
Vested or expected to vest, Weighted-Average Remaining Contractual Term	7 years 9 months 29 days
Vested or expected to vest, Aggregate Intrinsic Value | $	$ 52,643