Consolidated Statements of Equity (USD $) In Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Treasury Stock [Member]	Accumulated Other Comprehensive Loss	Retained Earnings [Member]	Noncontrolling Interest [Member]
Balances at Jan. 03, 2010	$ 340,310	$ 28	$ 217,181	$ (146,022)	$ (294)	$ 264,456	$ 4,961
Balances, shares at Jan. 03, 2010		22,911
Issuance of common stock under stock option plans, shares		436
Issuance of common stock under stock option plans	11,284	0	11,284	0	0	0	0
Issuance of common stock under employee stock purchase plan, shares		41
Issuance of common stock under employee stock purchase plan	1,586	0	1,586	0	0	0	0
Shares withheld for taxes on restricted stock, net of forfeitures, shares		(23)
Shares withheld for taxes on restricted stock, net of forfeitures	(57)	0	(57)	0	0	0	0
Purchases of treasury stock, shares		(252)
Purchases of treasury stock	(11,141)	(5)	0	(11,136)	0	0	0
Share-based compensation expense	2,684	0	2,684	0	0	0	0
Tax benefit from share-based compensation, net	1,784	0	1,784	0	0	0	0
Unrealized gain on derivatives	294	0	0	0	294	0	0
Distributions to noncontrolling interest partners	(726)	0	0	0	0	0	(726)
Contributions from noncontrolling interest partners	10	0	0	0	0	0	10
Purchases of noncontrolling interests, net of tax benefit	(590)	0	(259)	0	0	0	(331)
Partner investment expense	(124)	0	0	0	0	0	(124)
Partner bonus expense, imputed	213	0	0	0	0	0	213
Cash dividends paid	(3,945)		6	0	0	(3,951)	0
Net income	21,911		0	0	0	21,464	447
Balances at Jul. 04, 2010	363,493	23	234,209	(157,158)	0	281,969	4,450
Balances, shares at Jul. 04, 2010		23,113
Balances at Jan. 02, 2011	362,443	23	250,019	(187,112)	0	296,564	2,949
Balances, shares at Jan. 02, 2011		22,833
Issuance of common stock under stock option plans, shares		30
Issuance of common stock under stock option plans	734	0	734	0	0	0	0
Issuance of common stock under employee stock purchase plan, shares		38
Issuance of common stock under employee stock purchase plan	1,553	0	1,553	0	0	0	0
Shares withheld for taxes on restricted stock, net of forfeitures, shares		(4)
Shares withheld for taxes on restricted stock, net of forfeitures	(14)		(14)
Purchases of treasury stock, shares		(557)
Purchases of treasury stock	(23,659)	(1)	0	(23,658)	0	0	0
Share-based compensation expense	2,086	0	2,086	0	0	0	0
Tax benefit from share-based compensation, net	171	0	171	0	0	0	0
Distributions to noncontrolling interest partners	(434)	0	0	0	0	0	(434)
Purchases of noncontrolling interests, net of tax benefit	(1,953)	0	(1,219)	0	0	0	(734)
Partner investment expense	(176)	0	0	0	0	0	(176)
Partner bonus expense, imputed	112	0	0	0	0	0	112
Cash dividends paid	(11,364)		18	0	0	(11,382)	0
Net income	19,965		0	0	0	19,688	277
Balances at Jul. 03, 2011	$ 349,464	$ 22	$ 253,348	$ (210,770)	$ 0	$ 304,870	$ 1,994
Balances, shares at Jul. 03, 2011		22,340