Goodwill and Other Intangible Assets (Narrative) (Details) (USD $)	12 Months Ended
	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011	Jan. 01, 2011
Goodwill [Line Items]
Capitalized software, amortization	$ 2,900,000	$ 1,900,000	$ 1,700,000
Amortization expense for definite-lived intangibles	7,400,000	7,000,000	5,900,000
Goodwill	286,655,000	288,348,000	270,761,000	260,634,000
Trade Names [Member]
Goodwill [Line Items]
Trade names, net value	41,000,000	41,000,000	41,000,000
One Trade Name [Member]
Goodwill [Line Items]
Discount rate utilized for each reporting unit with rates range	12.00%
Terminal growth	3.00%
Fair value exceeds carrying value, percent	5.00%
Trade names, net value	7,600,000
Royalty rate	2.50%
Reporting Unit One [Member]
Goodwill [Line Items]
Discount rate utilized for each reporting unit with rates range	10.50%
Terminal growth	3.00%
Fair value exceeds carrying value, percent	7.00%
Goodwill	12,000,000
Decrease in fair value for every 100 basis point increase in discount rate	7,000,000
Decrease in fair value for every 100 basis point decrease in long-term growth rate	4,000,000
Reporting Unit Two [Member]
Goodwill [Line Items]
Discount rate utilized for each reporting unit with rates range	13.00%
Terminal growth	5.00%
Fair value exceeds carrying value, percent	6.00%
Goodwill	14,000,000
Decrease in fair value for every 100 basis point increase in discount rate	5,000,000
Decrease in fair value for every 100 basis point decrease in long-term growth rate	2,000,000
Office Furniture [Member]
Goodwill [Line Items]
Goodwill	$ 120,610,000	$ 122,303,000	$ 104,716,000	$ 94,589,000
Minimum [Member]
Goodwill [Line Items]
Discount rate utilized for each reporting unit with rates range	10.00%
Near term growth	(15.40%)
Terminal growth	3.00%
Minimum [Member] | Reporting Unit One [Member]
Goodwill [Line Items]
Near term growth	0.80%
Minimum [Member] | Reporting Unit Two [Member]
Goodwill [Line Items]
Near term growth	(15.40%)
Maximum [Member]
Goodwill [Line Items]
Discount rate utilized for each reporting unit with rates range	13.00%
Near term growth	17.50%
Terminal growth	5.00%
Maximum [Member] | Reporting Unit One [Member]
Goodwill [Line Items]
Near term growth	10.40%
Maximum [Member] | Reporting Unit Two [Member]
Goodwill [Line Items]
Near term growth	17.50%