Income Taxes - Schedule of Difference Between Effective and Statutory (Details)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Tax Disclosure [Abstract]
U.S. federal income tax rate	35.00%	35.00%	35.00%
State taxes	1.70%	2.30%	3.40%
Nondeductible stock-based compensation	1.90%	1.40%	0.80%
U.S. federal, state and foreign research and development credits	(4.10%)	(3.20%)	(3.50%)
Foreign earnings	(4.60%)	(1.90%)	(2.60%)
Domestic production activities deduction	(1.20%)	(2.20%)	(4.30%)
State software development activities benefit	(0.00%)	(2.40%)	(0.00%)
Other	0.90%	1.40%	1.20%
Effective income tax rate	29.60%	30.40%	30.00%