Income Taxes - Schedule of Deferred Tax and Related Valuation Allowance (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Income Tax Disclosure [Abstract]
Accrued bonus	$ 18,390	$ 13,161
Deferred revenue	10,055	11,334
Deferred rent	12,592	13,224
Stock-based compensation	32,030	31,705
Net operating losses	7,855	8,855
Unrealized losses	1,862	1,421
Tax credit carryforwards	23,629	22,918
License income	16,932	0
Other	7,048	5,989
Deferred tax assets	130,393	108,607
Depreciation and amortization	(10,470)	(10,848)
Acquired intangible assets	(44,788)	(37,923)
Internal-use software development costs capitalized	(77,375)	(66,807)
Deferred tax liabilities	(132,633)	(115,578)
Valuation allowance	(430)	(1,217)
Net deferred tax liabilities	$ (2,670)	$ (8,188)