Supplemental Cash Flow Information (Tables)

3 Months Ended

Mar. 31, 2018

Supplemental Cash Flow Information [Abstract]

Schedule of Net Changes in Operating Assets and Liabilities

Three months ended March 31,		2018		2017
Trade and other receivables	$	(90,077)	$	(58,839)
Inventory		3,090		7,813
Advances against auction contracts		(223)		(1,806)
Prepaid expenses and deposits		(3,443)		4,010
Income taxes receivable		1,903		(1,910)
Auction proceeds payable		103,390		178,655
Trade and other payables		8,202		(11,402)
Income taxes payable		920		(4,052)
Share unit liabilities		1,192		(408)
Other		311		(16)
Net changes in operating
assets and liabilities	$	25,265	$	112,045

Schedule of Supplemental Cash Flow

Three months ended March 31,		2018		2017
Interest paid, net of interest capitalized	$	16,877	$	903
Interest received		392		956
Net income taxes paid		1,265		14,756
Non-cash transactions:
Non-cash purchase of property, plant
and equipment under capital lease		573		207

Schedule of Cash, Cash Equivalents and Restricted Cash

		March 31,		December 31,
		2018		2017
Cash and cash equivalents	$	278,944	$	267,910
Restricted cash		62,414		63,206
Cash, cash equivalents, and restricted cash	$	341,358	$	331,116