INVESTMENTS (Tables)

3 Months Ended

Mar. 31, 2013

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

	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		$	16,023		$	2		$	-		$	16,025		$	-		$	-
Certificates of deposit		6,706			-			-			6,706			-			-
Municipal securities		75,671			32			-			75,703			-			-
Total		$	98,400		$	34		$	-		98,434			$	-		$	-
Trading
Short-term:
Auction rate securities											3,739
Long-term:
Auction rate securities											13,631
Total											$	115,804

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 March 31,
	2013		2012
Gain on transfer from available-for-sale to trading	$	-	$	-
Gain on trading securities sold	-		1,019
Gain on trading securities held	6		754
Gain on trading securites	$	6	$	1,773

Summarizes the underlying contractual maturities of the Company's investments

	March 31, 2013				December 31, 2012
	Amortized Cost		Fair Value		Amortized Cost		Fair Value
Less than 1 year:
U.S. Treasuries	$	16,023	$	16,025	$	16,040	$	16,040
Certificates of deposit	6,706		6,706		2,201		2,201
Municipal securities	75,671		75,703		77,038		77,027
Due 11 - 20 years:
Auction rate securities	10,758		10,758		10,748		10,748
Due 21 - 30 years:
Auction rate securities	6,612		6,612		9,925		12,408
Total	$	115,770	$	115,804	$	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

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Reference 3: 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.

Reference 5: 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.

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

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

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

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

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-Name Accounting Standards Codification

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-Name Accounting Standards Codification

-Glossary Trading Securities

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

+ Details