Operating Expenses

9 Months Ended

Sep. 30, 2016

Operating Expenses [Abstract]

Operating Expenses

7.  Operating expenses

Certain prior period operating expenses have been reclassified to conform with current year presentation.

Costs of services, excluding depreciation and amortization

	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

SG&A 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

7.  Operating expenses (continued)

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	-	$	-

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