Stock Compensation Plans and Stock Based Compensation (Details 3) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2016 USD ($) $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Options outstanding beginning balance | shares	8,977
Granted | shares	1,325
Exercised | shares	(3,148)
Canceled and forfeited | shares	(37)
Options outstanding ending balance | shares	7,117
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]
Weighted-Average Exercise Price, Options outstanding beginning balance | $ / shares	$ 11.35
Weighted-Average Exercise Price Granted | $ / shares	20.05
Weighted-Average Exercise Price Exercised | $ / shares	9.84
Weighted-Average Exercise Price Canceled and Forfeited | $ / shares	15.80
Weighted-Average Exercise Price, Options outstanding ending balance | $ / shares	$ 13.61
Summary of company stock option plans
Options vested as of December 31, 2016 | shares	5,036
Weighted Average Exercise Price, Options vested as of December 31, 2016 | $ / shares	$ 11.73
Weighted-Average Remaining Contractual Term, Options outstanding as of December 31, 2016	3 years 10 months 25 days
Weighted-Average Remaining Contractual Term, Options vested as of December 31, 2016	3 years 3 months 18 days
Aggregate Intrinsic Value, Options outstanding as of December 31, 2016 | $	$ 82,618
Aggregate Intrinsic Value, Options vested as of December 31, 2016 | $	$ 67,954