Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Operating activities:
Net income	$ 10,433	$ 29,994
Adjustments for items not affecting cash:
Depreciation and amortization expenses (note 7)	10,338	10,080
Inventory write down (note 12)	355	0
Stock option compensation expense (note 20)	1,311	1,070
Equity-classified PSU expense (note 20)	1,012
Deferred income tax recovery	(173)	(477)
Equity loss (income) less dividends received	53	(519)
Unrealized foreign exchange gain	(240)	(621)
Change in fair value of contingent consideration	(430)
Gain on disposition of property, plant and equipment	(721)	(246)
Debt issue cost amortization	445
Other, net	114
Net changes in operating assets and liabilities (note 10)	112,045	126,394
Net cash provided by operating activities	134,542	165,675
Investing activities:
Acquisition of Mascus (note 22)		(27,812)
Property, plant and equipment additions	(1,863)	(2,444)
Intangible asset additions	(5,664)	(3,711)
Proceeds on disposition of property, plant and equipment	1,505	824
Other, net		(173)
Net cash used in investing activities	(6,022)	(33,316)
Financing activities:
Issuances of share capital	3,412	3,031
Share repurchase (note 19)		(36,726)
Dividends paid to stockholders (note 19)	(18,160)	(17,154)
Dividends paid to NCI	(41)	(2,296)
Proceeds from short-term debt	1,219	30,179
Repayment of short-term debt	(1,009)	(2,283)
Repayment of finance lease obligations	(438)	(493)
Other, net	(48)	32
Net cash used in financing activities	(15,065)	(25,710)
Effect of changes in foreign currency rates on cash and cash equivalents	3,336	12,123
Cash, cash equivalents, and restricted cash:
Increase	116,791	118,772
Beginning of period	758,089	293,246
Cash, cash equivalents, and restricted cash, end of period (note 10)	$ 874,880	$ 412,018