Fair Value Of Assets And Liabilities (Tables)

12 Months Ended

Dec. 31, 2011

Fair Value Of Assets And Liabilities [Abstract]

Valuation Of Assets And Liabilities Measured At Fair Value On Recurring Basis


	Level 1		Level 2		Level 3		Fair Value
December 31, 2011
Assets
Money Market Funds(1)	$	67	$	0	$	0	$	67
Variable Rate Demand Notes(2)		0		19,939		0		19,939

Total assets measured at fair value	$	67	$	19,939	$	0	$	20,006


Liabilities
Acquisition-related contingent consideration— short-term(3)	$	0	$	0	$	10,483	$	10,483
Acquisition-related contingent consideration— long-term(4)		0		0		11,112		11,112

Total liabilities measured at fair value	$	0	$	0	$	21,595	$	21,595


December 31, 2010
Assets
Money Market Funds(1)	$	101,600	$	0	$	0	$	101,600

(1)	Included in cash and cash equivalents in the accompanying consolidated balance sheets.

(2)

Included in short-term investments in the accompanying consolidated balance sheets. The interest rates on the variable rate demand notes ("VRDN's") reset every seven days to adjust to current market conditions. The Company can redeem these investments at cost at any time with seven days notice. Therefore, the investments are held at cost, which approximates fair value, and are classified as available-for-sale short-term investments on the accompanying consolidated balance sheets. VRDN's are generally valued using published interest rates for instruments with similar terms and maturities, and, accordingly, are classified as Level 2 instruments of the fair value hierarchy. The Company believes the recorded values of its VRDN's approximate their fair values because of their nature and relatively short maturity dates or durations. The payment of principal and interest on the VRDN's held by the Company is guaranteed by letters of credit from the issuing financial institution.

(3)	Included in current installments of long-term obligations in the accompanying consolidated balance sheets.

(4)	Included in long-term obligations, excluding current installments in the accompanying consolidated balance sheets.

Changes In Estimated Fair Values Of Assets And Liabilities Measured Using Significant Unobservable Inputs


	Significant Unobservable Inputs (Level 3)
	Assets			Liabilities
	(In thousands)
Balance on December 31, 2009	$	58,650		$	6,070
Unrealized gain—trading securities included in earnings		4,435			0
Unrealized loss—UBS Put Option included in earnings		(4,435	)		0
Redemptions at par		(58,650	)		0
Acquisition-related contingent consideration recorded in 2010		0			4,195
Change in fair value of contingent consideration—included in SG&A		0			(9,265	)
Payments under contingent consideration arrangements		0			(1,000	)

Balance on December 31, 2010		0			0
Acquisition-related contingent consideration recorded in 2011		0			21,595

Balance on December 31, 2011	$	0		$	21,595

Estimated Fair Value Of Assets And Liabilities Not Measured On Recurring Basis


	December 31, 2011				December 31, 2010
	Carrying Value		Fair Value		Carrying Value		Fair Value
Assets:
Short-term investments—held to maturity	$	20,000	$	20,000	$	40,000	$	40,000
Restricted cash		0		0		345		345

Liabilities:
2.75% Series A Debentures		265,941		281,188		255,727		302,672
2.75% Series B Debentures		243,668		300,781		234,047		305,422
Short-term debt		100,000		100,000		0		0
Deferred acquisition obligations		20,996		20,996		619		619

- Definition

Tabular disclosure of the total amount of gains or losses for the period which are included in earnings or resulted in a change to net assets which gains or losses have arisen from the use of significant unobservable inputs (Level 3) to measure the fair value of assets and liabilities. Such gains or losses are attributable to the change in unrealized gains or losses relating to those assets and liabilities so valued which are still held at the reporting date and which change are also considered for disclosure; it may be expected that a description of where those unrealized gains or losses are reported in the statement of income or the statement of financial position would also be disclosed.

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- Definition

Tabular disclosure of assets and liabilities by class, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a nonrecurring basis in periods after initial recognition (for example, impaired assets). The disclosures that may be required or desired include: (a) the fair value measurements recorded during the period and the reasons for the measurements and (b) 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 or liabilities (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). Where the quoted price in an active market for the identical liability is not available, the Level 1 input is the quoted price of an identical liability when traded as an asset.

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