Consolidated Statements of Comprehensive Income Statement (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 28, 2014	Sep. 29, 2013	Sep. 30, 2012
Net earnings	$ 88,950	$ 51,152	$ 57,651
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax	(1,890)	(110)	(1,055)
Net change in fair value of derivatives	1,291	1,353	1,304
Cash flow hedges, Net change in fair value of derivatives	(599)	1,243	249
Tax effect	229	(476)	(97)
Cash flow hedges	(370)	767	152
Actuarial gains (losses) arising during the period	(49,173)	98,764	(78,619)
Actuarial losses and prior service cost reclassified to earnings	5,245	18,895	13,532
Unrecognized periodic benefit costs before tax	43,928	(117,659)	65,087
Tax effect	16,821	(45,079)	24,862
Unrecognized periodic benefit costs	(27,107)	72,580	(40,225)
Foreign currency translation adjustments	10	8	0
Tax effect	(3)	(4)	0
Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax	7	4	0
Other comprehensive income (loss), net of tax	(27,470)	73,351	(40,073)
Comprehensive income	$ 61,480	$ 124,503	$ 17,578