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Supplemental Disclosure of Cash Flow Information (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jul. 04, 2014	Jun. 28, 2013	Jul. 04, 2014	Jun. 28, 2013
Cash paid during period:
Income taxes			$ 9,346	$ 7,902
Non-cash investing and financing activities:
Unrealized gain (loss) on available for sale investment securities, net of tax	8	(10)	22	(22)
Vested stock unit awards issued to settle accrued bonuses			6,008	5,807
Accrual for capital expenditures			$ 767	$ 0

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Vested Restricted Stock Awards Issued to Settle Accrued Bonuses

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Future cash outflow to pay for purchases of fixed assets that have occurred.

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The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income.

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Amount after tax, before reclassification adjustments, of unrealized holding gain (loss) on available-for-sale securities.

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