Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Operating activities:
Net income	$ 70,585	$ 69,956
Adjustments for items not affecting cash:
Depreciation and amortization expenses (note 7)	20,364	21,385
Inventory write down (note 13)	1,402	313
Stock option compensation expense (note 21)	2,470	2,056
Equity-classified PSU expense (note 21)	486
Deferred income tax recovery	(3,366)	(3,233)
Equity income less dividends received	(996)	(406)
Unrealized foreign exchange loss (gain)	(12)	187
Gain on disposition of property, plant and equipment	(447)	(966)
Net changes in operating assets and liabilities (note 11)	(52,931)	43,865
Net cash provided by operating activities	37,555	133,157
Investing activities:
Acquisition of Mascus (note 23)	(28,123)
Acquisition of NCI (note 23)	(226)
Property, plant and equipment additions	(4,997)	(4,612)
Intangible asset additions	(6,693)	(4,467)
Proceeds on disposition of property, plant and equipment	1,428	3,896
Net cash used in investing activities	(38,611)	(5,183)
Financing activities:
Issuances of share capital	18,057	27,946
Share repurchase (note 20)	(36,726)	(47,489)
Dividends paid to stockholders (note 20)	(34,176)	(30,044)
Dividends paid to contingently redeemable NCI	(2,368)	(1,340)
Proceeds from short-term debt	31,336	6,682
Repayment of short-term debt	(24,156)	(601)
Proceeds from long-term debt	46,572
Repayment of long-term debt	(46,568)
Repayment of finance lease obligations	(907)	(1,054)
Other, net	268	201
Net cash used in financing activities	(48,668)	(45,699)
Effect of changes in foreign currency rates on cash and cash equivalents	6,077	(7,881)
Increase (decrease) in cash and cash equivalents	(43,647)	74,394
Cash and cash equivalents, beginning of period	210,148	139,815
Cash and cash equivalents, end of period	$ 166,501	$ 214,209