Business Combinations - Purchase Price Allocation (Details) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2016	Aug. 31, 2016	Jul. 31, 2016	Dec. 31, 2015
Business Acquisition [Line Items]
Goodwill	$ 41,721			$ 26,371
Laser Projection Technologies
Business Acquisition [Line Items]
Accounts receivable		$ 54
Inventory		322
Other assets		248
Deferred income tax assets		1,112
Intangible assets		5,224
Goodwill		11,922
Accounts payable and accrued liabilities		(697)
Other liabilities		(1,086)
Deferred income tax liability		0
Total purchase price, net of cash acquired		$ 17,099
BuildIT Software & Solutions
Business Acquisition [Line Items]
Accounts receivable			$ 237
Inventory			0
Other assets			36
Deferred income tax assets			0
Intangible assets			1,381
Goodwill			3,042
Accounts payable and accrued liabilities			(95)
Other liabilities			(485)
Deferred income tax liability			(304)
Total purchase price, net of cash acquired			$ 3,812
Minimum
Business Acquisition [Line Items]
Weighted average useful life of intangible assets acquired	7 years
Maximum
Business Acquisition [Line Items]
Weighted average useful life of intangible assets acquired	10 years