COST OF REVENUE

12 Months Ended

Dec. 31, 2012

COST OF REVENUE

COST OF REVENUE

15.  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 provision of services, reimbursable expenses, technology and telephony expenses 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)	2012		2011		2010
Compensation and benefits	$	113,145	$	82,548	$	62,791
Outside fees and services	123,338		86,201		60,583
Reimbursable expenses	96,147		82,074		47,449
Technology and communications	23,404		18,772		12,548
Depreciation and amortization	10,167		6,254		5,688
Total	$	366,201	$	275,849	$	189,059