Business Combinations - Additional Information (Details) - USD ($) $ in Thousands			3 Months Ended
	Jan. 27, 2017	Dec. 30, 2016	Mar. 31, 2017	Dec. 31, 2016
Business Acquisition [Line Items]
Purchase price of acquisition, cash			$ 21,235
Goodwill			$ 30,932	$ 9,676
IDV Solutions LLC
Business Acquisition [Line Items]
Date of acquisition of business			Jan. 27, 2017
Purchase price of acquisition, cash	$ 21,200
Escrow deposit	2,500
Acquisition, preliminary purchase price	5,000		$ 26,255
Weighted average useful life of identified acquired intangible assets			4 years 3 months 4 days
Goodwill	$ 21,100		$ 21,107
Business acquisition transaction costs			$ 100
IDV Solutions LLC | Developed Technology
Business Acquisition [Line Items]
Weighted average useful life of identified acquired intangible assets			3 years
IDV Solutions LLC | Customer Relationships
Business Acquisition [Line Items]
Weighted average useful life of identified acquired intangible assets			5 years
IDV Solutions LLC | Non-compete Arrangement
Business Acquisition [Line Items]
Weighted average useful life of identified acquired intangible assets			2 years
IDV Solutions LLC | Trade Names
Business Acquisition [Line Items]
Weighted average useful life of identified acquired intangible assets			5 years
IDV Solutions LLC | Minimum
Business Acquisition [Line Items]
Business acquisition, billings threshold date			Jun. 30, 2017
Weighted average life (years)			2 years
IDV Solutions LLC | Maximum
Business Acquisition [Line Items]
Business acquisition, billings threshold date			Dec. 31, 2017
Weighted average life (years)			5 years
Crisis Commander
Business Acquisition [Line Items]
Acquisition, preliminary purchase price		$ 2,700
Business acquisition closing date			Dec. 30, 2016