Operating Expenses (Tables)

9 Months Ended

Sep. 30, 2016

Operating Expenses [Abstract]

Schedule of Direct Operating Expenses

	Three months ended				Nine months ended
	September 30,				September 30,
		2016		2015		2016		2015
Employee compensation expenses	$	6,593	$	5,309	$	21,731	$	16,185
Buildings, facilities and technology expenses		1,709		1,745		6,015		5,191
Travel, advertising and promotion expenses		4,991		5,120		18,287		16,207
Other costs of services		1,457		(129)		3,788		3,098
	$	14,750	$	12,045	$	49,821	$	40,681

Schedule of Selling, General and Administrative Expenses

	Three months ended				Nine months ended
	September 30,				September 30,
		2016		2015		2016		2015
Employee compensation expenses	$	43,077	$	36,287	$	135,129	$	122,062
Buildings, facilities and technology expenses		12,466		10,516		36,671		30,849
Travel, advertising and promotion expenses		6,273		5,388		18,594		16,274
Professional fees		3,675		3,157		9,524		9,456
Other SG&A expenses		3,509		2,822		11,235		8,524
	$	69,000	$	58,170	$	211,153	$	187,165

Schedule of Acquisition Related Costs

	Three months ended				Nine months ended
	September 30,				September 30,
		2016		2015		2016			2015
Iron Planet Holdings Inc.
("IronPlanet") (note 24)	$	4,514	$	-	$	4,514		$	-
Mascus (note 25)		-		-		749			-
Petrowsky Auctioneers Inc.
("Petrowsky") (note 25)		177		-		177			-
	$	4,691		-	$	5,440	-	$	-

Schedule of Depreciation and Amortization Expenses

	Three months ended				Nine months ended
	September 30,				September 30,
		2016		2015		2016		2015
Depreciation expense	$	7,751	$	8,491	$	23,466	$	26,718
Amortization expense		2,445		1,526		7,094		4,684
	$	10,196	$	10,017	$	30,560	$	31,402