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CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE EARNINGS (Parenthetical) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 30, 2013	Mar. 31, 2012
Statement of Other Comprehensive Income [Abstract]
Unrealized gain (loss) on available-for-sale (AFS) securities, tax effect	$ 21,218	$ 13,077
Reclassification adjustment for net realized (gain) loss on AFS securities, tax effect	(1,027)	(92)
Adjustment to postretirement benefit plan obligation, tax effect	$ 508	$ 301

- Definition

Tax effect of the income statement impact of the reclassification adjustment for unrealized gain (loss) realized upon the sale of available-for-sale securities.

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- Definition

Tax effect of unrealized holding gain (loss) before reclassification adjustments and transfers on available-for-sale securities.

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