Business Combinations - Schedule of Purchase Price Allocation to the Fair Values of Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands	1 Months Ended					12 Months Ended
	Dec. 31, 2016	Aug. 31, 2016	Jul. 31, 2016	Mar. 31, 2015	Feb. 28, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Business Acquisition [Line Items]
Goodwill	$ 46,744					$ 46,744	$ 26,371	$ 19,205
Total purchase price, net of cash acquired						27,708	$ 12,066	$ 1,150
ARAS
Business Acquisition [Line Items]
Accounts receivable					$ 294
Inventory					0
Other assets					0
Deferred income tax assets					0
Intangible assets					5,351
Goodwill					4,964
Accounts payable and accrued liabilities					(27)
Other liabilities					(219)
Deferred income tax liabilities					(1,385)
Contingent consideration					(1,338)
Total purchase price, net of cash acquired					$ 7,640
Kubit
Business Acquisition [Line Items]
Accounts receivable				$ 136
Inventory				0
Other assets				246
Deferred income tax assets				0
Intangible assets				2,571
Goodwill				3,805
Accounts payable and accrued liabilities				(182)
Other liabilities				(489)
Deferred income tax liabilities				(674)
Contingent consideration				(987)
Total purchase price, net of cash acquired				$ 4,426
BuildIT
Business Acquisition [Line Items]
Accounts receivable			$ 237
Inventory			0
Other assets			36
Deferred income tax assets			0
Intangible assets			1,015
Goodwill			3,393
Accounts payable and accrued liabilities			(95)
Other liabilities			(471)
Deferred income tax liabilities			(205)
Contingent consideration			0
Total purchase price, net of cash acquired			$ 3,910
LPT
Business Acquisition [Line Items]
Accounts receivable		$ 54
Inventory		322
Other assets		160
Deferred income tax assets		1,112
Intangible assets		5,474
Goodwill		11,872
Accounts payable and accrued liabilities		(697)
Other liabilities		(1,086)
Deferred income tax liabilities		0
Contingent consideration		0
Total purchase price, net of cash acquired		$ 17,211
MWF
Business Acquisition [Line Items]
Accounts receivable	150					150
Inventory	0					0
Other assets	666					666
Deferred income tax assets	0					0
Intangible assets	1,816					1,816
Goodwill	5,364					5,364
Accounts payable and accrued liabilities	(700)					(700)
Other liabilities	(345)					(345)
Deferred income tax liabilities	(364)					(364)
Contingent consideration	0					$ 0
Total purchase price, net of cash acquired	$ 6,587