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Stock-Based Compensation (Details 4)
shares in Thousands
6 Months Ended
Jul. 01, 2016
shares
Restricted Stock [Member]  
Outstanding at January 1, 2016 124
Granted 15
Vested (124)
Forfeited 0
Outstanding at July1, 2016 15
Restricted Stock Units (RSUs) [Member]  
Outstanding at January 1, 2016 339
Granted 307
Vested (379)
Forfeited (6)
Outstanding at July1, 2016 261