Condensed Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 30, 2014		Mar. 31, 2013
Net income	$ 929		$ 6,589
Other comprehensive income (loss):
Net unrealized gains on marketable securities arising during period, net of tax of $654, $115	1,139		200
Less: Reclassification adjustment for net gains included in net income, net of tax of $(102), $(83)	(176)		(144)
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax, Total	963		56
Defined benefit pension and post-retirement plans:
Amortization of prior service benefit included in net periodic pension and post-retirement expense/income, net of tax of $(42), $(40)	(73)	[1]	(69)	[1]
Other comprehensive income (loss)	890		(13)
Comprehensive income	$ 1,819		$ 6,576

[1] The amortization of prior service benefit is included in the computation of net periodic pension cost and postretirement benefit; see Note N: "Retirement Plans."