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Restructuring (Tables)
 6 Months Ended
Jun. 30, 2014
Restructuring Costs [Abstract]  
Summary of changes in restructuring accrual
The following table summarizes the activity in the restructuring accrual for the three months ended March 31, 2014 and the three months ended June 30, 2014 (in thousands):
 
Q4 2013 Restructuring Plan
Balance at December 31, 2013
$
277

Cash payments for the first quarter of 2014
(238
)
Adjustments to previously accrued charges
(39
)
Balance at March 31, 2014
$
—

Cash payments for the second quarter of 2014
$
—

Adjustment to previously accrued charges
$
—

Balance at June 30, 2014
$
—