Operating Expenses (Tables)

9 Months Ended

Sep. 30, 2019

Operating Expenses

Schedule of Direct Operating Expenses

	Three months ended				Nine months ended
	September 30,				September 30,
	2019		2018		2019		2018
Ancillary and logistical service expenses	$	13,285	$	11,682	$	43,516	$	46,242
Employee compensation expenses		11,555		10,170		37,268		30,120
Buildings, facilities and technology expenses		1,655		1,990		5,961		7,280
Travel, advertising and promotion expenses		5,765		5,921		24,440		20,535
Other costs of services		4,122		3,290		11,534		8,566
	$	36,382	$	33,053	$	122,719	$	112,743

Schedule of Selling, General and Administrative Expenses

	Three months ended				Nine months ended
	September 30,				September 30,
	2019		2018		2019		2018
Employee compensation expenses	$	60,680		56,959	$	186,033	$	186,951
Buildings, facilities and technology expenses		14,569		15,058		45,066		45,767
Travel, advertising and promotion expenses		10,033		9,302		28,400		27,821
Professional fees		3,685		2,983		11,915		12,638
Other SG&A expenses		4,724		4,021		15,175		13,875
	$	93,691	$	88,323	$	286,589	$	287,052

Schedule of Acquisition Related Costs

	Three months ended				Nine months ended
	September 30,				September 30,
	2019		2018		2019		2018
IronPlanet:
Other acquisition-related costs	$	—	$	1,756	$	82	$	2,876
Other acquisitions:
Continuing employment costs		34		251		121		2,104
Other acquisition-related costs		11		—		549		59
	$	45	$	2,007	$	752	$	5,039

Schedule of Depreciation and Amortization Expenses

	Three months ended				Nine months ended
	September 30,				September 30,
	2019		2018		2019		2018
Depreciation expense	$	7,305	$	7,252	$	21,630	$	21,460
Amortization expense		10,387		9,471		30,289		27,991
	$	17,692	$	16,723	$	51,919	$	49,451