Condensed Consolidated Income Statements - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Total revenues	$ 260,178	$ 199,427
Costs of services	36,657	24,340
Cost of inventory sold	75,791	63,401
Selling, general and administrative expenses	97,470	70,575
Acquisition-related costs	1,633	8,627
Depreciation and amortization expenses	16,191	10,338
Gain on disposition of property, plant and equipment	(345)	(721)
Foreign exchange gain	(92)	(730)
Total operating expenses	227,305	175,830
Operating income	32,873	23,597
Interest expense	(11,310)	(8,133)
Other income, net	913	2,284
Income before income taxes	22,476	17,748
Current income tax expense	4,004	7,488
Deferred income tax expense (recovery)	1,265	(173)
Income tax expense	5,269	7,315
Net income	17,207	10,433
Net income attributable to:
Stockholders	17,138	10,377
Non-controlling interests	$ 69	$ 56
Earnings per share attributable to stockholders:
Basic	$ 0.16	$ 0.10
Diluted	$ 0.16	$ 0.10
Weighted average number of shares outstanding:
Basic	107,355,381	106,851,595
Diluted	108,643,897	107,788,949
Service Revenues [Member]
Total revenues	$ 176,016	$ 123,379
Revenue from Inventory Sales [Member]
Total revenues	$ 84,162	$ 76,048