Supplemental Cash Flow Information

12 Months Ended

Dec. 31, 2019

Supplemental Cash Flow Information

Supplemental Cash Flow Information

11.   Supplemental cash flow information

Year ended December 31,	2019		2018		2017
Trade and other receivables	$	(8,611)	$	(43,341)	$	(19,161)
Inventory		44,633		(77,292)		(8,557)
Advances against auction contracts		2,766		(8,266)		3,246
Prepaid expenses and deposits		(3,403)		646		1,178
Income taxes receivable		(445)		13,053		(6,067)
Auction proceeds payable		69,382		8,768		25,783
Trade and other payables		(21,296)		39,531		21,854
Income taxes payable		5,812		1,954		(3,986)
Share unit liabilities		—		1,070		(5,421)
Operating lease obligation		(13,404)		—		—
Other		1,168		(1,673)		1,410
Net changes in operating assets and liabilities	$	76,602	$	(65,550)	$	10,279

Net capital spending, which consists of property, plant and equipment and intangible asset additions, net of proceeds on disposition of property, plant and equipment, was $35,075,000 for the year ended December 31, 2019 (2018: $32,426,000; 2017: $34,436,000).

Year ended December 31,	2019		2018		2017
Interest paid, net of interest capitalized	$	37,046	$	39,429	$	23,360
Interest received		3,802		2,888		3,196
Net income taxes paid		26,699		10,352		28,281
Non-cash purchase of property, plant and equipment under capital lease		15,282		8,968		8,820
Non-cash right of use assets obtained in exchange for new lease obligations	$	29,117	$	—	$	—

	2019		2018		2017
Cash and cash equivalents	$	359,671	$	237,744	$	267,910
Restricted cash		60,585		67,823		63,206
Cash, cash equivalents, and restricted cash	$	420,256	$	305,567	$	331,116