Marketable Securities

6 Months Ended

Jun. 30, 2012

Marketable Securities [Abstract]

Marketable Securities [Text Block]

Marketable Securities

The Company has evaluated its investment policies and determined that all of its investment securities are to be classified as available-for-sale.  Available-for-sale securities are carried at fair value, with the unrealized gains and losses reported in Stockholders’ Equity under the caption “Accumulated other comprehensive loss.”  Realized gains and losses on available-for-sale securities are included in “Other income (expense).”  The Company records other-than-temporary impairment charges for its available-for-sale investments when it intends to sell the securities, it is more-likely-than not that it will be required to sell the securities before a recovery, or when it does not expect to recover the entire amortized cost basis of the securities.  The cost of securities sold is based on the specific identification method.

As of June 30, 2012, the Company held one auction-rate security with a fair value of $379. The underlying asset of the Company’s auction-rate security consisted of a municipal bond with an auction reset feature. Due to auction failures in the marketplace, the Company will not have access to these funds unless (a) future auctions occur and are successful, (b) the security is called by the issuer, (c) the Company sells the security in an available secondary market, or (d) the underlying note matures. Currently, there are no active secondary markets. As of June 30, 2012, the Company had recorded a cumulative temporary unrealized impairment loss of $121 within “Accumulated other comprehensive loss” based upon its assessment of the fair value of this security. The Company believes that this impairment is temporary, as it does not intend to sell this security, the Company will not be required to sell this security before recovery, and the Company expects to recover the amortized cost basis of this security.

The Company has determined that the gross unrealized losses on its marketable securities at June 30, 2012 and December 31, 2011 are temporary in nature. The Company reviews its investment portfolio to identify and evaluate investments that have indications of possible impairment. Factors considered in determining whether a loss is other-than-temporary include the length of time and extent to which fair value has been less than the cost basis, credit quality and the Company’s ability and intent to hold the investment for a period of time sufficient to allow for any anticipated recovery in market value.

At June 30, 2012 and December 31, 2011, marketable securities are categorized as follows:

	Amortized Cost		Gross Unrealized Holding Gains		Gross Unrealized Holding Losses			Fair Value
June 30, 2012
Municipal notes and bonds	$	78,482	$	58	$	(17	)	$	78,523
Auction rate securities	500		—		(121		)	379
Total marketable securities	$	78,982	$	58	$	(138	)	$	78,902
December 31, 2011
Municipal notes and bonds	$	70,475	$	60	$	(10	)	$	70,525
Auction rate securities	500		—		(137		)	363
Total marketable securities	$	70,975	$	60	$	(147	)	$	70,888

 The amortized cost and estimated fair value of marketable securities classified by the maturity date listed on the security, regardless of the Condensed Consolidated Balance Sheet classification, is as follows at June 30, 2012 and December 31, 2011:

	June 30, 2012				December 31, 2011
	Amortized Cost		Fair Value		Amortized Cost		Fair Value
Due within one year	$	61,078	$	61,103	$	59,469	$	59,509
Due after one through five years	17,087		17,113		10,587		10,599
Due after five through ten years	212		205		314		312
Due after ten years	605		481		605		468
Total marketable securities	$	78,982	$	78,902	$	70,975	$	70,888

The following table summarizes the estimated fair value and gross unrealized holding losses of marketable securities, aggregated by investment instrument and period of time in an unrealized loss position at June 30, 2012 and December 31, 2011:  

	In Unrealized Loss Position For Less Than 12 Months					In Unrealized Loss Position For Greater Than 12 Months
	Fair Value		Gross Unrealized Losses			Fair Value		Gross Unrealized Losses
June 30, 2012
Municipal notes and bonds	$	13,122	$	(17	)	$	—	$	—
Auction rate securities	—		—			379		(121		)
Total	$	13,122	$	(17	)	$	379	$	(121	)
December 31, 2011
Municipal notes and bonds	7,291		(10		)	—		—
Auction rate securities	—		—			363		(137		)
Total	$	7,291	$	(10	)	$	363	$	(137	)

See Note 3 for additional discussion regarding the fair value of the Company’s marketable securities.