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Basis of Presentation and Significant Accounting Policies (Tables)

3 Months Ended

Mar. 29, 2014

Fair Value of Assets and Liabilities Measured on a Recurring Basis [Abstract]

Fair Value of Assets and Liabilities Measured on a Recurring Basis

The following table represents the Company's assets and liabilities measured at fair value on a recurring basis at March 29, 2014 (in thousands):

							Quoted Prices
							in Active			Significant
							Markets			Other			Significant
							for Identical			Observable			Unobservable
				Total at			Assets			Inputs			Inputs
				March 29, 2014			(Level 1)			(Level 2)			(Level 3)
Assets:
	U.S. Treasury securities			$	629,981		$	-		$	629,981		$	-
	Foreign government securities				34,990			-			34,990			-
	Corporate debt securities				757,815			-			757,815			-
	Time deposits				70,845			-			70,845			-
	Equity securities				147			-			147			-
	Other cash equivalents				54,929			-			54,929			-
	Waters 401(k) Restoration Plan assets				31,901			-			31,901			-
	Foreign currency exchange contract
		agreements			370			-			370			-
		Total		$	1,580,978		$	-		$	1,580,978		$	-
Liabilities:
	Foreign currency exchange contract
		agreements		$	410		$	-		$	410		$	-
		Total		$	410		$	-		$	410		$	-

The following table represents the Company's assets and liabilities measured at fair value on a recurring basis at December 31, 2013 (in thousands):

							Quoted Prices
							in Active			Significant
							Markets			Other			Significant
				Total at			for Identical			Observable			Unobservable
				December 31,			Assets			Inputs			Inputs
				2013			(Level 1)			(Level 2)			(Level 3)
Assets:
	U.S. Treasury securities			$	556,539		$	-		$	556,539		$	-
	Foreign government securities				139,670			-			139,670			-
	Corporate debt securities				629,434			-			629,434			-
	Time deposits				74,050			-			74,050			-
	Equity securities				147			-			147			-
	Other cash equivalents				62,851			-			62,851			-
	Waters 401(k) Restoration Plan assets				31,203			-			31,203			-
	Foreign currency exchange contract
		agreements			929			-			929			-
		Total		$	1,494,823		$	-		$	1,494,823		$	-
Liabilities:
	Foreign currency exchange contract
		agreements		$	88		$	-		$	88		$	-
		Total		$	88		$	-		$	88		$	-

Summary of Derivative Instruments by Risk Exposure [Abstract]

Gains (Losses) on Foreign Exchange Contracts

The following is a summary of the activity in the statements of operations related to the forward foreign exchange contracts (in thousands):

		Three Months Ended
		March 29, 2014			March 30, 2013
Realized (losses) gains on closed contracts		$	(314)		$	694
Unrealized losses on open contracts			(881)			(570)
Cumulative net pre-tax (losses) gains		$	(1,195)		$	124

Fair Value of Forward Foreign Exchange Contracts

The Company's foreign currency exchange contracts included in the consolidated balance sheets are classified as follows (in thousands):

			March 29, 2014			December 31, 2013
Other current assets			$	370		$	929
Other current liabilities			$	410		$	88

Warranty Accrual Roll Forward [Abstract]

Warranty Accrual Roll Forward

The following is a summary of the activity of the Company's accrued warranty liability for the three months ended March 29, 2014 and March 30, 2013 (in thousands):

		Balance at									Balance at
		Beginning			Accruals for			Settlements			End of
		of Period			Warranties			Made			Period
Accrued warranty liability:
March 29, 2014		$	12,962		$	1,752		$	(1,919)		$	12,795
March 30, 2013		$	12,353		$	2,404		$	(2,101)		$	12,656

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Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=25499696&loc=d3e19190-110258

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Tabular disclosure of the presentation of foreign exchange contracts on the statement of financial position, including the fair value amounts and location of such amounts.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 4B

-Subparagraph (c)(1)

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Tabular disclosure of the changes in the guarantor's aggregate product warranty liability, including the beginning balance of the aggregate product warranty liability, the aggregate reductions in that liability for payments made (in cash or in kind) under the warranty, the aggregate changes in the liability for accruals related to product warranties issued during the reporting period, the aggregate changes in the liability for accruals related to preexisting warranties (including adjustments related to changes in estimates), and the ending balance of the aggregate product warranty liability.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 460

-SubTopic 10

-Section 50

-Paragraph 8

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