Business Combinations - Purchase Price Allocation (Details) - USD ($) $ in Thousands	1 Months Ended
	Dec. 31, 2016	Aug. 31, 2016	Jul. 31, 2016	Mar. 31, 2017
Business Acquisition [Line Items]
Goodwill (1)	$ 46,744			$ 47,433
BuildIT Software and Solutions Ltd.
Business Acquisition [Line Items]
Accounts receivable			$ 237
Inventory			0
Other assets			36
Deferred income tax assets			0
Intangible assets			1,015
Goodwill (1)			3,393
Accounts payable and accrued liabilities			(95)
Other liabilities			(471)
Deferred income tax liability			(205)
Total purchase price, net of cash acquired			$ 3,910
Laser Projection Technologies
Business Acquisition [Line Items]
Accounts receivable		$ 54
Inventory		322
Other assets		160
Deferred income tax assets		1,112
Intangible assets		5,474
Goodwill (1)		11,922
Accounts payable and accrued liabilities		(747)
Other liabilities		(1,086)
Deferred income tax liability		0
Total purchase price, net of cash acquired		$ 17,211
MWF
Business Acquisition [Line Items]
Accounts receivable	150
Inventory	0
Other assets	666
Deferred income tax assets	0
Intangible assets	1,816
Goodwill (1)	5,364
Accounts payable and accrued liabilities	(700)
Other liabilities	(345)
Deferred income tax liability	(364)
Total purchase price, net of cash acquired	$ 6,587