Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Operating activities:
Net income	$ 86,046	$ 38,469
Adjustments for items not affecting cash:
Depreciation and amortization expenses	49,451	37,047
Impairment loss		8,911
Stock option compensation expense	6,711	10,996
Equity-classified PSU expense	8,978	1,871
Deferred income tax expense (recovery)	(3,774)	(9,583)
Unrealized foreign exchange loss (gain)	501	(1,011)
Amortization of debt issuance costs	3,032	2,058
Gain on disposition of equity investment	(4,935)
Other, net	(4,636)	(2,090)
Net changes in operating assets and liabilities	(44,227)	11,849
Net cash provided by operating activities	97,147	98,517
Investing activities:
Acquisition of IronPlanet, net of cash acquired		(675,851)
Property, plant and equipment additions	(13,394)	(8,086)
Intangible asset additions	(19,410)	(20,482)
Proceeds on disposition of property, plant and equipment	2,524	3,487
Proceeds on disposal of equity investment	6,147
Other, net	(4,674)	(667)
Net cash used in investing activities	(28,807)	(701,599)
Financing activities:
Dividends paid to stockholders	(56,116)	(54,558)
Dividends paid to NCI		(41)
Issuances of share capital	27,072	7,934
Payment of withholding taxes on issuance of shares	(3,901)
Proceeds from short-term debt	6,949	6,850
Repayment of short-term debt	(3,372)	(22,793)
Proceeds from long-term debt		325,000
Repayment of long-term debt	(58,825)	(104,729)
Debt issue costs		(12,624)
Repayment of finance lease obligations	(2,827)	(1,565)
Other, net	(1,176)	(1,431)
Net cash provided by (used in) financing activities	(92,196)	142,043
Effect of changes in foreign currency rates on cash, cash equivalents, and restricted cash	(3,215)	17,270
Decrease	(27,071)	(443,769)
Beginning of period	331,116	758,089
Cash, cash equivalents, and restricted cash, end of period	$ 304,045	$ 314,320