Supplemental Cash Flow Information (Narrative) (Details) - USD ($) $ in Thousands		12 Months Ended
	Apr. 10, 2015	Dec. 27, 2015	Dec. 28, 2014	Dec. 29, 2013
Supplemental Cash Flow Information [Abstract]
Payments for interest		$ 1,600	$ 1,800	$ 16,300
Income taxes		7,800	10,700	10,800
Capital expenditures incurred but not yet paid		1,600	1,600	1,100
New capital lease obligation and related capitalized assets		400	200	100
Cash portion of dividend paid	$ 20,980	$ 20,980	$ 0	$ 0
Non-cash portion of dividend paid	$ 400