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INVESTMENTS (Tables)

9 Months Ended

Sep. 30, 2015

INVESTMENTS

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

September 30, 2015		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:
Commercial paper		$	306,858		$	-		$	-		$	306,858		$	-		$	-
U.S. Treasuries		92,994			5			-			92,999			-			-
Certificates of deposit		44,506			-			-			44,506			-			-
Municipal securities		611,370			319			10			611,679			10			-
U.S. government agency securities		487,495			23			4			487,514			4			-
Long-term:
Municipal securities		29,333			16			4			29,345			4			-
U.S. government agency securities		5,022			-			3			5,019			3			-
Total		$	1,577,578		$	363		$	21		1,577,920			$	21		$	-
Trading
Short-term:
Auction rate securities											1,487
Long-term:
Auction rate securities											-
Total											$	1,579,407
December 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:
Commercial paper		$	19,482		$	-		$	2		$	19,480		$	-		$	-
Municipal securities		744,542			105			-			744,647			-			-
U.S. government agency securities		9,199			-			1			9,198			-			-
Long-term:
Municipal securities		42,940			10			-			42,950			-			-
Available-for-sale
Variable rate demand notes		4,001			-			-			4,001			-			-
Total		$	820,164		$	115		$	3		820,276			$	-		$	-
Trading
Short-term:
Auction rate securities											3,910
Long-term:
Auction rate securities											-
Total											$	824,186

Summarizes the underlying contractual maturities of the Company's investments

		September 30, 2015						December 31, 2014
		Amortized Cost			Fair Value			Amortized Cost			Fair Value
Less than 1 year:
Commercial paper		$	306,858		$	306,858		$	19,482		$	19,480
U.S. Treasuries		92,994			92,999			-			-
Certificates of deposit		44,506			44,506			-			-
Municipal securities		611,370			611,679			744,542			744,647
U.S. government agency securities		487,495			487,514			9,199			9,198
Due 1 - 10 years:
Municipal securities		29,333			29,345			42,940			42,950
U.S. government agency securities		5,022			5,019			-			-
Due 11 - 20 years:
Auction rate securities		1,487			1,487			3,910			3,910
Due 21 - 30 years:
Variable rate demand notes		-			-			4,001			4,001
Total		$	1,579,065		$	1,579,407		$	824,074		$	824,186

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