INVESTMENTS (Tables)

3 Months Ended

Mar. 31, 2014

March 31, 2014	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:
Certificates of deposit	$	22,043	$	-	$	-	$	22,043	$	-	$	-
Commercial paper	9,990		-		-		9,990		-		-
Municipal securities	400,504		25		-		400,529		-		-
Total	$	432,537	$	25	$	-	432,562		$	-	$	-

Trading
Short-term:
Auction rate securities							6,395
Long-term:
Auction rate securities							8,131
Total							$	447,088

December 31, 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:
Certificates of deposit	$	22,045	$	-	$	-	$	22,045	$	-	$	-
Commercial paper	5,991		-		-		5,991		-		-
Municipal securities	367,819		48		-		367,867		-		-
Total	$	395,855	$	48	$	-	395,903		$	-	$	-

Trading
Short-term:
Auction rate securities							6,392
Long-term:
Auction rate securities							9,792
Total							$	412,087

	Three-Months Ended March 31,
	2014			2013
Gain on trading securities sold	$	131		$	-
(Loss) gain on trading securities held	(64		)	6
Gain on trading securites	$	67		$	6

Tabular disclosure of investments in trading securities.