Supplemental Cash Flow Information (Tables)

12 Months Ended

Dec. 31, 2018

Supplemental Cash Flow Information [Abstract]

Schedule of Net Changes in Operating Assets and Liabilities

Year ended December 31,		2018		2017		2016
Trade and other receivables	$	(43,341)	$	(19,161)	$	6,419
Inventory		(77,292)		(8,557)		26,557
Advances against auction contracts		(8,266)		3,246		(1,012)
Prepaid expenses and deposits		646		1,178		(7,443)
Income taxes receivable		13,053		(6,067)		(10,686)
Auction proceeds payable		8,768		25,783		550
Trade and other payables		39,531		21,854		5,627
Income taxes payable		1,954		(3,986)		(8,657)
Share unit liabilities		1,070		(5,421)		4,503
Other		(1,673)		1,410		(5,176)
Net changes in operating
assets and liabilities	$	(65,550)	$	10,279	$	10,682

Schedule of Supplemental Cash Flow

Year ended December 31,		2018		2017		2016
Interest paid, net of interest capitalized	$	39,429	$	23,360	$	5,792
Interest received		2,888		3,196		1,861
Net income taxes paid		10,352		28,281		54,037
Non-cash purchase of property, plant
and equipment under capital lease	$	8,968	$	8,820	$	3,376

Schedule of Cash, Cash Equivalents and Restricted Cash

		2018		2017		2016
Cash and cash equivalents	$	237,744	$	267,910	$	207,867
Restricted cash		67,823		63,206		550,222
Cash, cash equivalents, and restricted cash	$	305,567	$	331,116	$	758,089