Stock-Based Awards - Stock Options (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 27, 2015	Dec. 28, 2014	Dec. 29, 2013
Options (number of shares):
Exercised	(341,362)	(169,286)	(914,272)
Weighted Average Exercise Price (in dollars per share):
Total intrinsic value	$ 2,700	$ 1,500	$ 5,300
Stock Options [Member]
Options (number of shares):
Options outstanding at beginning of year	8,170,000
Granted	0	0	0
Exercised	(341,000)
Forfeited/Expired	(1,439,000)
Options outstanding at end of period	6,390,000	8,170,000
Options expected to vest at end of period	6,390,000
Options exercisable at end of period	6,390,000
Weighted Average Exercise Price (in dollars per share):
Options outstanding at beginning of year	$ 18
Granted	0
Exercised	6
Forfeited/Expired	27
Options outstanding at end of period	16	$ 18
Options expected to vest at end of period	16
Options exercisable at end of period	$ 16
Outstanding weighted average remaining contractual term, beginning of period	2 years 11 months 16 days	3 years
Outstanding weighted average remaining contractual term, end of period	2 years 11 months 16 days	3 years
Outstanding aggregate intrinsic value, beginning of period	$ 16,234
Outstanding aggregate intrinsic value, end of period	$ 13,938	$ 16,234
Options expected to vest weighted average remaining contractual term	2 years 11 months 16 days
Options exercisable weighted average remaining contractual term	2 years 11 months 16 days
Options expected to vest aggregate intrinsic value	$ 13,938
Options exercisable aggregate intrinsic value	$ 13,938
2004 Directors' Plan [Member] | Director [Member] | Equity Option [Member]
Options (number of shares):
Granted	0	0	0