Significant Accounting Policies (Details 3) (USD $)	3 Months Ended
	Mar. 29, 2015 item	Mar. 30, 2014
Significant Accounting Policies
Number of joint ventures under which noncontrolling interest holders have the option to require the Company to purchase their interests	2
Net deferred tax liability, net	$ 9,000,000
Redeemable Noncontrolling Interests
Balance at the beginning of the period	8,555,000
Change in redemption value	70,000	(8,000)
Balance at the end of the period	8,798,000
Redeemable noncontrolling interests
Redeemable Noncontrolling Interests
Balance at the beginning of the period	8,555,000
Net income	1,313,000
Distributions	(1,000,000)
Change in redemption value	(70,000)
Balance at the end of the period	$ 8,798,000