Stock-Based Compensation (Stock Options Outstanding) (Details) $ / shares in Units, shares in Thousands, $ 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 | shares	8,113
Granted | shares	874
Options assumed in acquisition | shares	428
Exercised | shares	(2,562)
Canceled | shares	(650)
Ending balance | shares	6,203
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
Beginning balance | $ / shares	$ 8.05
Granted | $ / shares	16.59
Options assumed in acquisition | $ / shares	4.43
Exercised | $ / shares	5.35
Canceled | $ / shares	11.56
Ending balance | $ / shares	$ 9.76
Outstanding	7 years 4 months 24 days
Outstanding, aggregate intrinsic value | $	$ 41,871
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest [Abstract]
Vested and expected to vest (in shares) | shares	6,126
Vested and expected to vest (in dollars per share) | $ / shares	$ 9.71
Vested and expected to vest	7 years 4 months 16 days
Vested and expected to vest, aggregate intrinsic value | $	$ 41,635
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Exercisable (in shares) | shares	3,502
Exercisable (in dollars per share) | $ / shares	$ 7.77
Exercisable	6 years 8 months 30 days
Exercisable, aggregate intrinsic value | $	$ 30,393