Business Acquisitions - Additional Information (Details) - USD ($) $ in Thousands					3 Months Ended				6 Months Ended			12 Months Ended
	Jan. 05, 2016	Apr. 30, 2015	Apr. 30, 2015	Apr. 21, 2015	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Business Acquisition [Line Items]
Total purchase price, net of cash received			$ 37,638							$ 271,458	$ 23,625
Cash on hand at signing		$ 3,789	3,789
Business combination, earn-out payment										3,000	0
Revenues					$ 172,907			$ 112,788		343,911	229,009
(Loss) income from operations					(118)			12,424		1,734	22,803
Amortization expense of intangible assets					9,100			$ 1,800		18,300	$ 3,100
Aesynt Holding, L.P., Aesynt, Ltd.
Business Acquisition [Line Items]
Total purchase price, net of cash received	$ 271,500
Cash on hand at signing	8,200
Adjustment to preliminary value, goodwill					800
Adjustment to preliminary value, accounts receivable					500
Adjustment to preliminary value, current liabilities					300
Acquisition-related costs	$ 8,000
Revenue of acquiree since acquisition date									$ 82,000
Revenues										9,800
(Loss) income from operations									(20,200)	3,000
Amortization expense of intangible assets										800
Aesynt Holding, L.P., Aesynt, Ltd. | In-process research and development (IPR&D) (1)
Business Acquisition [Line Items]
Royalty rate	12.50%
Aesynt Holding, L.P., Aesynt, Ltd. | Customer relationships
Business Acquisition [Line Items]
Discount rate	13.00%
Aesynt Holding, L.P., Aesynt, Ltd. | Backlog
Business Acquisition [Line Items]
Discount rate	10.00%
Aesynt Holding, L.P., Aesynt, Ltd. | Non-compete
Business Acquisition [Line Items]
Discount rate	13.00%
Aesynt Holding, L.P., Aesynt, Ltd. | Trade names
Business Acquisition [Line Items]
Royalty rate	0.50%
Aesynt Holding, L.P., Aesynt, Ltd. | Minimum
Business Acquisition [Line Items]
In process research and development, expected term	2 years
Aesynt Holding, L.P., Aesynt, Ltd. | Minimum | Developed technology
Business Acquisition [Line Items]
Royalty rate	0.40%
Aesynt Holding, L.P., Aesynt, Ltd. | Maximum
Business Acquisition [Line Items]
In process research and development, expected term	3 years
Aesynt Holding, L.P., Aesynt, Ltd. | Maximum | Developed technology
Business Acquisition [Line Items]
Royalty rate	0.80%
Mach4
Business Acquisition [Line Items]
Total purchase price, net of cash received				$ 16,889
Cash on hand at signing				397
Payment to acquire business, amount in cash after adjustments				17,300
Amount placed in escrow fund for business acquisition				$ 2,700
Avantec
Business Acquisition [Line Items]
Total purchase price, net of cash received		20,749
Cash on hand at signing		$ 3,392	$ 3,392
Percentage of interest acquired		85.00%	85.00%					85.00%			85.00%
Payments to acquire business, gross		$ 12,000
Business acquisition, potential earn-out payment		5,600	$ 5,600
Business acquisition, amount withheld for indemnification		$ 1,800	1,800
Period after closing date to settle indemnification and other claims		18 months
Business combination, earn-out payment						$ 3,000
Revenues										5,100
(Loss) income from operations										900
Amortization expense of intangible assets									$ 14,000	500
Avantec | Payable After December 31, 2015
Business Acquisition [Line Items]
Business acquisition, potential earn-out payment		$ 3,000	3,000
Avantec | Payable After December 31, 2016
Business Acquisition [Line Items]
Business acquisition, potential earn-out payment		$ 3,000	$ 3,000
Selling, General and Administrative Expenses | Aesynt Holding, L.P., Aesynt, Ltd.
Business Acquisition [Line Items]
Acquisition-related costs					$ 5,100		$ 2,900			$ 5,100		$ 2,900