Fair Value Measurements

12 Months Ended

Dec. 31, 2011

Fair Value Disclosures [Abstract]

Fair Value Measurements

Fair Value Measurements

The accounting framework for determining fair value includes a hierarchy for ranking the quality and reliability of the information used to measure fair value, which enables the reader of the financial statements to assess the inputs used to develop those measurements. The fair value hierarchy consists of three tiers as follows: Level 1, defined as quoted market prices in active markets for identical assets or liabilities; Level 2, defined as inputs other than Level 1 that are observable, either directly or indirectly, such as quoted prices for similar assets or liabilities, quoted prices in markets that are not active, model-based valuation techniques for which all significant assumptions are observable in the market or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities and Level 3, defined as unobservable inputs that are not corroborated by market data.

Assets and Liabilities that are Measured at Fair Value on a Recurring basis

Our financial assets and liabilities recorded at fair value on a recurring basis include cash and cash equivalents and restricted cash. Cash and cash equivalents and current restricted cash are invested in U.S. money market funds and various U.S. and foreign bank operating and time deposit accounts, which are due on demand or carry a maturity date of less than three months when purchased. No restrictions have been imposed on us regarding withdrawal of balances with respect to our cash and cash equivalents as a result of liquidity or other credit market issues affecting the money market funds we invest in or the counterparty financial institutions holding our deposits. Money market funds and restricted cash are valued using quoted market prices in active markets for identical assets as summarized in the following tables as of December 31, 2011 and 2010:

	December 31, 2011
	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total
	(In thousands)
Cash equivalent money market funds	$	165,540	$	—	$	—	$	165,540
Restricted cash money market funds	2,680		—		—		2,680

	December 31, 2010
	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total
	(In thousands)
Cash equivalent money market funds	$	145,827	$	—	$	—	$	145,827
Restricted cash money market funds	17,782		—		—		17,782

Assets and Liabilities that are Measured at Fair Value on a Nonrecurring Basis

We measure certain assets and liabilities, including property, plant and equipment, intangible assets and an equity investment, at fair value on a nonrecurring basis. Such measurements are generally obtained from third party appraisal reports. Impairment losses on property, plant and equipment included in cost of sales were $3.3 million, $1.4 million and $6.0 million in 2011, 2010 and 2009, respectively. Impairment losses included in selling, general and administrative expenses were zero in 2011 and 2009 and $0.6 million in 2010. Impairment losses included in research and development expenses were zero in 2011 and 2010 and $2.6 million in 2009.

Financial Instruments Not Recorded at Fair Value on a Recurring Basis

We measure the fair value of our debt on a quarterly basis for disclosure purposes. The following table presents the carrying amounts and fair values of financial instruments that are not recorded at fair value on a recurring basis as of December 31, 2011 and 2010:

	December 31,
	2011		2010
	(In thousands)
Carrying value of debt	$	1,346,651	$	1,364,300
Fair value of debt	$	1,495,353	$	1,806,231

The estimated fair value of the debt is based primarily on quoted market prices reported on the respective balance sheet dates for our senior and senior subordinated notes. The estimated fair value for the debt of our subsidiaries and the December 2013 Notes is based on market based assumptions including current borrowing rates for similar types of borrowing arrangements adjusted for duration, optionality and risk profile.