INVESTMENTS (Tables)

6 Months Ended

Jun. 30, 2013

Summary of investments in held-to-maturity, available-for-sale and trading securities

June 30, 2013	Amortized Cost		Gross Unrealized Holding Gains		Gross Unrealized Holding Losses		Fair Value		Continuous Unrealized Loss Position less than 12 Months		Continuous Unrealized Loss Position greater than 12 Months
Held-to-Maturity
Short-term:
U.S. Treasuries	$	11,019	$	2	$	-	$	11,021	$	-	$	-
Certificates of deposit	11,515		-		-		11,515		-		-
Municipal securities	119,854		43		-		119,897		-		-
Total	$	142,388	$	45	$	-	142,433		$	-	$	-
Trading
Short-term:
Auction rate securities							5,809
Long-term:
Auction rate securities							11,953
Total							$	160,195

December 31, 2012	Amortized Cost		Gross Unrealized Holding Gains		Gross Unrealized Holding Losses		Fair Value		Continuous Unrealized Loss Position less than 12 Months		Continuous Unrealized Loss Position greater than 12 Months
Held-to-Maturity
Short-term:
U.S. Treasuries	$	16,040	$	-	$	-	$	16,040	$	-	$	-
Certificates of deposit	2,201		-		-		2,201		-		-
Municipal securities	77,038		-		11		77,027		11		-
Available-for-sale
Long-term:
Auction rate securities	3,310		2,483		-		5,793		-		-
Total	$	98,589	$	2,483	$	11	101,061		$	11	$	-
Trading
Short-term:
Auction rate securities							1,763
Long-term:
Auction rate securities							15,600
Total							$	118,424

Schedule of net gain recognized through earnings on trading securities

	Three-Months Ended June 30,					Six-Months Ended June 30,
	2013		2012			2013		2012
Gain on transfer from available-for-sale to trading	$	-	$	-		$	-	$	-
Gain on trading securities sold	-		54			-		1,073
Gain (loss) on trading securities held	392		(255		)	399		499
Gain (loss) on trading securites	$	392	$	(201	)	$	399	$	1,572

Summarizes the underlying contractual maturities of the Company's investments

	June 30, 2013				December 31, 2012

	Amortized Cost		Fair Value		Amortized Cost		Fair Value
Less than 1 year:
U.S. Treasuries	$	11,019	$	11,021	$	16,040	$	16,040
Certificates of deposit	11,515		11,515		2,201		2,201
Municipal securities	119,854		119,897		77,038		77,027
Due 11 - 20 years:
Auction rate securities	11,042		11,042		10,748		10,748
Due 21 - 30 years:
Auction rate securities	6,720		6,720		9,925		12,408
Total	$	160,150	$	160,195	$	115,952	$	118,424

- Definition

Tabular disclosure of trading securities (and certain trading assets) which consist of all investments in certain debt and equity securities (and other assets) that are bought and held principally for the purpose of selling them in the near term (thus held for only a short period of time) or for which an entity has elected the fair value option. Trading generally reflects active and frequent buying and selling, and trading securities are generally used with the objective of generating profits on short-term differences in price, but this category of investments may also include items which are not intended to be sold in the near term or for which the fair value option has been elected.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 115

-Paragraph 21

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name FASB Staff Position (FSP)

-Number FAS115-1/124-1

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 115

-Paragraph 13

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef

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Reference 7: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 115

-Paragraph 12

-Subparagraph a

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 8: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Trading Securities

-URI http://asc.fasb.org/extlink&oid=6526789

Reference 9: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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Reference 10: http://www.xbrl.org/2003/role/presentationRef

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details