Fair Value of Financial Instruments

12 Months Ended

Dec. 31, 2011

Fair Value of Financial Instruments [Abstract]

Fair Value of Financial Instruments

7.  Fair Value of Financial Instruments

Investments

As of December 31, 2011, the company held investments consisting of three auction-rate debt securities (life insurance company capital reserve funds), an auction-rate equity security (financial guarantee company capital reserve fund) and two preferred stock investments.  These investments are classified as available for sale securities and as non-current assets on the company’s balance sheet.  Contractual maturities for the debt securities are 13 years or greater and the remaining securities have no fixed maturity.  The amortized cost and fair value of these investments were as follows (in thousands):

	December 31, 2011							December 31, 2010
	Cost or Amortized Cost		Net Unrealized Gain (Loss)			Fair Value		Cost or Amortized Cost		Net Unrealized Gain (Loss)			Fair Value
Debt	$	7,150	$	(1,050	)	$	6,100	$	7,150	$	(450	)	$	6,700
Equity(1)		2,000		400			2,400		2,000		(100	)		1,900
Total	$	9,150	$	(650	)	$	8,500	$	9,150	$	(550	)	$	8,600

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(1)  As of December 31, 2011 and 2010, the amortized cost and fair values of the two preferred stock investments were $0.

        The changes in fair value of the investments were as follows (in thousands):

	Years Ended December 31,
	2011			2010
Debt Securities
Fair value at beginning of period	$	6,700		$	10,900
Temporary impairment (charges) credits, net		(600	)		50
Other-than-temporary impairment charges		—			(850	)
Sale of security		—			(3,400	)
Net change in fair value		(600	)		(4,200	)
Fair value at end of period	$	6,100		$	6,700
Equity Securities
Fair value at beginning of period	$	1,900		$	2,200
Temporary impairment credits (charges), net		500			(300	)
Net change in fair value		500			(300	)
Fair value at end of period	$	2,400		$	1,900
Total
Fair value at beginning of period	$	8,600		$	13,100
Temporary impairment charges, net		(100	)		(250	)
Other-than-temporary impairment charges		—			(850	)
Sale of security		—			(3,400	)
Net change in fair value		(100	)		(4,500	)
Fair value at end of period	$	8,500		$	8,600

Auction-rate securities are intended to be structured to provide liquidity through an auction process that resets the applicable interest rate at predetermined calendar intervals.  This mechanism allows existing investors either to roll over or liquidate their holdings by selling such securities at par.  Since the third quarter of 2007 and through December 31, 2011, the auctions, which occur approximately every 28 days for the auction-rate securities held by the company, have not had sufficient buyers to cover investors’ sell orders, resulting in unsuccessful auctions.  These unsuccessful auctions result in a resetting of the interest rate paid on the securities until the next auction date, at which time the process is repeated.

The company has estimated the fair value of these securities based on an income approach using a discounted cash flow analysis which considered the following key inputs: (i) the underlying structure of each security; (ii) the present value of future principal and interest payments discounted at rates considered to reflect current market conditions and the relevant risk associated with each security; and (iii) the time horizon until each security will be sold.  The discount rates used in the present value calculations are based on yields on U.S. Treasury securities with similar time horizons plus interest rate risk premiums that are intended to compensate for general market risk and the risk specific to each security.  The risk premiums are based upon current credit default swap pricing market data for similar or related securities or credit spreads for corporate bonds with similar credit ratings and similar maturities.  The discounted cash flow analysis is a Level 3 valuation.

In 2010, the company sold an auction-rate debt security for $4.3 million resulting in a $0.9 million gain.  There was no other sale, purchase, issuance, settlement or transfer activity related to these investments during the periods presented.

For the year ended December 31, 2011, the company did not record any other-than-temporary impairment charges.  For the years ended December 31, 2010 and 2009, the company recorded other-than-temporary impairment charges of $0.9 million and $3.3 million, respectively.  The company records other-than-temporary impairment charges with respect to equity securities based on the company’s assessment that it is likely that the fair value of the investment will not fully recover in the foreseeable future given the duration, severity and continuing declining trend of the fair value of the security, as well as the uncertain financial condition and near-term prospects of the issuer.  The company determines other-than-temporary impairment charges for its debt securities based on credit losses.

At this time it is uncertain if or when the liquidity issues relating to these investments will improve, and there can be no assurance that the market for auction-rate securities will stabilize.  The fair value of the auction-rate securities could change significantly in the future and the company may be required to record additional temporary or other-than-temporary impairment charges if there are further reductions in fair value in future periods.

Convertible Notes

The fair value of the 2.4375% convertible notes at December 31, 2011 and 2010 was estimated at approximately $145.2 million and $150.2 million, respectively.  The fair value was determined based on market prices quoted by a broker-dealer.