Property, Equipment, and Software (Tables)
 12 Months Ended
Dec. 31, 2015
Property, Plant and Equipment [Abstract]  
Property, equipment, and software
Property, equipment and software consist of the following (in thousands):
 
 
December 31,
 
 
2015
 
2014
Computer and other equipment
 
$
21,348

 
$
17,701

Leasehold improvements
 
17,851

 
12,491

Software
 
22,302

 
12,398

Office furniture
 
4,888

 
3,152

Property and equipment and software, gross
 
66,389

 
45,742

Less accumulated depreciation and amortization
 
(39,172
)
 
(31,148
)
Property and equipment and software, net
 
$
27,217

 
$
14,594
Summary of the Allocation of Depreciation and Amortization Expense between Cost of Services and Selling, General and Administrative Expenses
The following table summarizes the allocation of depreciation and amortization expense between cost of services and selling, general and administrative expenses (in thousands):
 
 
For the Year Ended December 31,
 
 
2015
 
2014
 
2013
Cost of services
 
$
7,536

 
$
4,603

 
$
4,697

Selling, general and administrative
 
926

 
1,444

 
2,126

Total depreciation and amortization
 
$
8,462

 
$
6,047

 
$
6,823