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Supplemental Disclosure of Cash Flow Information (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 01, 2016	Jul. 03, 2015	Jul. 01, 2016	Jul. 03, 2015
Cash paid during period:
Income taxes			$ 11,808	$ 10,235
Non-cash investing and financing activities:
Unrealized gain (loss) on short-term investments	$ (1)	$ (10)	84	(17)
Vested stock unit awards issued to settle accrued bonuses			6,334	6,169
Accrual for capital expenditures			$ 422	$ 226

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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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-Publisher FASB
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-SubTopic 10
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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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-Publisher FASB
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Amount after tax, before reclassification adjustments, of unrealized holding gain (loss) on available-for-sale securities.

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