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Allocation of Personnel Expenses
 12 Months Ended
Dec. 31, 2016
Compensation Related Costs [Abstract]  
Allocation of Personnel Expenses
Allocation of Personnel Expenses
Allocation of Personnel Expenses By Function
 
Year Ended December 31,
 
2014

2015

2016
 
(in thousands)
Research and development expenses
$
(40,075
)

$
(58,075
)

$
(86,389
)
Sales and operations expenses
(119,609
)

(150,426
)

(185,065
)
General and administrative expenses
(29,734
)

(37,670
)

(60,899
)
Total personnel expenses
$
(189,418
)
 
$
(246,171
)
 
$
(332,353
)
Allocation of Personnel Expenses by Nature
 
Year Ended December 31,
 
2014

2015

2016
 
(in thousands)
Wages and salaries
$
(128,737
)

$
(170,079
)

$
(220,317
)
Severance pay
(2,469
)

(1,343
)

(2,726
)
Social charges
(38,814
)

(47,176
)

(59,668
)
Other social expenses
(3,178
)

(6,033
)

(9,913
)
Acquisition-related deferred price consideration
(950
)

(324
)

(85
)
Share based compensation
(19,600
)

(23,989
)

(43,259
)
Profit sharing
(733
)

(613
)

(1,326
)
Research tax credit (classified as a reduction of R&D expenses)
5,063


3,386


4,941

Total personnel expenses
$
(189,418
)
 
$
(246,171
)
 
$
(332,353
)