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INVESTMENTS (Tables)

9 Months Ended

Sep. 30, 2016

INVESTMENTS

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

September 30, 2016		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		$	28,318		$	-		$	-		$	28,318		$	-		$	-
Municipal securities		181,843			-			222			181,621			222			-
U.S. government agency securities		26,080			1			3			26,078			3			-
Long-term:
Municipal securities		9,519			-			19			9,500			19			-
Available-for-Sale:
Short-term:
Variable rate demand notes		21,412			-			-			21,412			-			-
Total		$	267,172		$	1		$	244		$	266,929		$	244		$	-
December 31, 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		$	3,978		$	-		$	-		$	3,978		$	-		$	-
Municipal securities		709,207			63			192			709,078			192			-
U.S. government agency securities		23,369			-			58			23,311			58			-
U.S. Treasuries		8,056			-			13			8,043			13			-
Long-term:
Municipal securities		11,071			-			8			11,063			8			-
U.S. government agency securities		4,277			-			25			4,252			25			-
Total		$	759,958		$	63		$	296		$	759,725		$	296		$	-

Summarizes the underlying contractual maturities of the Company's investments

		September 30, 2016						December 31, 2015
		Amortized Cost			Fair Value			Amortized Cost			Fair Value
Less than 1 year:
Commercial paper		$	28,318		$	28,318		$	3,978		$	3,978
Municipal securities		181,843			181,621			709,207			709,078
U.S. government agency securities		26,080			26,078			23,369			23,311
U.S. Treasuries		-			-			8,056			8,043
Due 1 -10 years:
Municipal securities		9,519			9,500			11,071			11,063
U.S. government agency securities		-			-			4,277			4,252
Variable rate demand notes		6,003			6,003			-			-
Due 11 - 20 years:
Variable rate demand notes		8,005			8,005			-			-
Due 21 - 30 years:
Variable rate demand notes		4,002			4,002			-			-
Due 31 - 40 years:
Variable rate demand notes		3,402			3,402			-			-
Total		$	267,172		$	266,929		$	759,958		$	759,725

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