COST OF REVENUE

Cost of revenue principally includes payroll and employee benefits associated with personnel employed in customer service and operations roles, fees paid to external providers related to the provision of services, reimbursable expenses, technology and telecommunications costs as well as depreciation and amortization of operating assets. The components of cost of revenue were as follows for the years ended December 31:



(in thousands)	2016		2015		2014

Compensation and benefits	$	264,796	$	261,839	$	255,889
Outside fees and services	302,156		248,278		243,325
Reimbursable expenses	52,011		107,344		137,634
Technology and telecommunications	44,295		43,177		48,834
Depreciation and amortization	26,787		26,689		21,498

Total	$	690,045	$	687,327	$	707,180