Supplemental cash flow information

12 Months Ended

Dec. 31, 2020

Supplemental cash flow information

Supplemental cash flow information

11.   Supplemental cash flow information

Year ended December 31,	2020		2019		2018
Trade and other receivables	$	22,079	$	(8,611)	$	(43,341)
Inventory		(18,149)		44,633		(77,292)
Advances against auction contracts		6,705		2,766		(8,266)
Prepaid expenses and deposits		2,196		(3,403)		646
Income taxes receivable		13		(445)		13,053
Auction proceeds payable		(74,114)		69,382		8,768
Trade and other payables		38,078		(21,296)		39,531
Income taxes payable		9,671		5,812		1,954
Share unit liabilities		—		—		1,070
Operating lease obligation		(11,162)		(13,404)		—
Other		(4,451)		1,168		(1,673)
Net changes in operating assets and liabilities	$	(29,134)	$	76,602	$	(65,550)

Net capital spending, which consists of property, plant and equipment and intangible asset additions excluding those acquired through business combinations, net of proceeds on disposition of property, plant and equipment, was $26,751,000 for the year ended December 31, 2020 (2019: $35,075,000; 2018: $32,426,000).

Year ended December 31,	2020		2019		2018
Interest paid, net of interest capitalized	$	32,521	$	37,046	$	39,429
Interest received		2,338		3,802		2,888
Net income taxes paid		43,398		26,699		10,352
Non-cash purchase of property, plant and equipment under finance lease		11,326		15,282		8,968
Non-cash right of use assets obtained (reassessed) in exchange for new lease obligations		10,588		29,117		—
Non-cash equity consideration in connection with Rouse acquisition		1,459		—		—

	2020		2019		2018
Cash and cash equivalents	$	278,766	$	359,671	$	237,744
Restricted cash		28,129		60,585		67,823
Cash, cash equivalents, and restricted cash	$	306,895	$	420,256	$	305,567