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Segment Information - Summary of Unallocated Corporate Overhead (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 26, 2015
Sep. 27, 2014
Sep. 26, 2015
Sep. 27, 2014
Segment Reporting Information [Line Items]        
Stock-based compensation expense $ 10,476 $ 8,251 $ 30,349 $ 23,132
Depreciation expense 17,400 18,400 51,900 51,600
Unallocated corporate        
Segment Reporting Information [Line Items]        
Stock-based compensation expense 6,802 4,918 19,501 13,525
Salary, bonus and fringe 6,821 5,892 24,751 23,597
Consulting, audit and professional services 4,280 3,053 11,051 8,721
IT related expenses 2,618 1,767 6,167 4,667
Depreciation expense 1,847 1,954 5,524 5,666
Acquisition related adjustments 3,478 580 7,072 5,256
Other general unallocated corporate expenses 1,823 2,269 6,063 6,330
Total unallocated corporate overhead costs $ 27,669 $ 20,433 $ 80,129 $ 67,762