CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Jun. 29, 2013	Dec. 29, 2012
Current assets:
Allowance for doubtful accounts (in dollars)	$ 3,186	$ 3,148
Shareowners' equity:
Common shares, authorized (in shares)	65,000,000	65,000,000
Common shares, par value (in dollars per share)	$ 0.10	$ 0.10
Common shares, outstanding	47,537,000	47,132,000