Partnership Capital Subject to Mandatory Redemption (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended	12 Months Ended
	Jun. 29, 2012	Dec. 31, 2011	Jun. 24, 2011	Dec. 31, 2010
Partnership's Capital
Limited partnership capital	$ 655,532	$ 662,226
Subordinated limited partnership capital	287,743	255,414
General partnership capital issued	1,001,992	927,578
Partner capital issued	1,945,267	1,845,218
Partnership Loans
General partnership loans outstanding at beginning of period		86,853
General partnership loans issued in current year	94,098	91,693
Repayment of general partnership loans in current year	(7,696)	(4,840)
Partnership loans outstanding	173,255	86,853
Partnership capital subject to mandatory redemption net of reserve for anticipated withdrawal	1,772,012	1,758,365
Reserve for anticipated withdrawals	81,092	147,412	72,105	108,248
Partnership capital subject to mandatory redemption	$ 1,853,104	$ 1,905,777	$ 1,818,538	$ 1,604,973