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Restructuring Charges (Tables)
12 Months Ended
Dec. 31, 2014
Restructuring and Related Activities [Abstract]  
Schedule of Restructuring Charges by Type of Cost
 
By Type of Cost
 
 
Employee Separation Costs
Contract Assignment Costs
Asset Related and Other Costs
Total
Costs incurred and charged to expense for the year ended December 31, 2014
$
4,992

$

$

$
4,992

Costs incurred and charged to expense for the year ended December 31, 2013
$
3,961

$

$
1,804

$
5,765

Costs incurred and charged to expense for the year ended December 31, 2012
$
9,052

$
3,629

$
2,544

$
15,225

Schedule of Restructuring Reserve by Type of Cost
Changes to the accrued restructuring liability (which is included in Accrued and other current liabilities) for 2014, 2013 and 2012, (in thousands):
 
By Type of Cost
 
 
Employee Separation Costs
Contract Assignment Costs
Total
Accrued liability as of December 31, 2011
$
131

$

$
131

Costs incurred and charged to expense for the year ended December 31, 2012, excluding non-cash charges
8,300

3,629

11,929

Cash payments
(7,700
)
(1,929
)
(9,629
)
Accrued liability as of December 31, 2012
731

1,700

2,431

Costs incurred and charged to expense for the year ended December 31, 2013
3,961


3,961

Cash payments
(3,936
)
(1,700
)
(5,636
)
Accrued liability as of December 31, 2013
756


756

Costs incurred and charged to expense for the year ended December 31, 2014
4,992


4,992

Cash payments
(5,299
)

(5,299
)
Accrued liability as of December 31, 2014
$
449

$

$
449