Stock Based Compensation (Details) - Stock Option Activity - 2014 and 2003 Stock Option Plan [Member] $ / shares in Units, shares in Thousands, $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2016 USD ($) $ / shares shares	Dec. 31, 2015 USD ($) $ / shares shares
Number of Options
Options outstanding, beginning balance (in Shares) | shares	4,757
Granted (in Shares) | shares	1,874
Exercised (in Shares) | shares	(1,729)
Forfeited (in Shares) | shares	(251)
Options outstanding, ending balance (in Shares) | shares	4,651	4,757
Options, exercisable (in Shares) | shares	1,393
Weighted Average Exercise Price
Weighted average exercise price, beginning balance (in Dollars per share) | $ / shares	$ 20.33
Granted (in Dollars per share) | $ / shares	27.07
Exercised (in Dollars per share) | $ / shares	7.55
Forfeited (in Dollars per share) | $ / shares	28.75
Weighted average exercise price, ending balance (in Dollars per share) | $ / shares	27.32	$ 20.33
Weighted average exercise price, exercisable (in Dollars per share) | $ / shares	$ 23.07
Weighted Average Remaining Contractual Term (Years)	5 years 1 month 16 days	3 years 4 months 28 days
Weighted Average Remaining Contractual Term, exercisable (Years)	3 years 24 days
Aggregate Intrinsic Value | $	$ 15,164	$ 86,107
Aggregate Intrinsic Value, exercisable | $	$ 9,845