CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) shares in Thousands, $ in Thousands	Dec. 30, 2017	Dec. 31, 2016
Accumulated Depreciation, Property and Equipment	$ 1,783,383	$ 1,660,648
Preferred stock, non-voting, par value	$ 0.0001	$ 0.0001
Preferred Stock, Shares Authorized	10,000	10,000
Preferred Stock, Shares Issued	0	0
Preferred Stock, Shares Outstanding	0	0
Common stock, voting, par value	$ 0.0001	$ 0.0001
Common Stock, Shares Authorized	200,000	200,000
Common Stock, Shares, Issued	75,569	75,326
Common Stock, Shares, Outstanding	73,936	73,749
Treasury Stock, Shares	1,633	1,577