Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Sep. 28, 2014	Dec. 29, 2013
Statement of Financial Position [Abstract]
Allowance for doubtful accounts receivable	$ 10,525	$ 12,404
Preferred stock, no par value (USD per share)	$ 0	$ 0
Preferred stock, shares authorized (shares)	500,000	500,000
Preferred stock, shares issued (shares)	0	0
Common stock, par value (USD per share)	$ 0.1	$ 0.1
Common stock, shares authorized (shares)	100,000,000	100,000,000
Common stock, shares issued (shares)	45,777,029	45,484,524
Treasury stock (shares)	4,035,912	4,035,912