Income taxes (Tables)

6 Months Ended

Jun. 27, 2014

Income taxes [Abstract]

Income tax expense

The income tax expense for the six months ended was as follows (in thousands):

	June 27, 2014			June 28, 2013
Income tax expense	$	3,992		$	84
Effective tax rate		(31.0	)%		(0.7	)%