Investment in Available-for-Sale Securities (Tables)

9 Months Ended

Sep. 30, 2016

Available-For-Sale Securities [Abstract]

Schedule of Available-for-sale Securities Reconciliation [Table Text Block]

The following is a summary of the Company’s investments in available-for-sale securities as of September 30, 2016 (unaudited):

	Cost		Unrealized Gains		Unrealized Losses		Fair Value
U.S. federal agency securities	$	4,898	$	53	$	-	$	4,951
Municipal securities		311,517		1,582		(236)		312,863
Certificates of deposit		741,769		31,612		(10,736)		762,645
Corporate debt securities		16,795		216		-		17,011
	$	1,074,979	$	33,463	$	(10,972)	$	1,097,470

The following is a summary of the Company’s investments in available-for-sale securities as of December 31, 2015:

	Cost		Unrealized Gains		Unrealized Losses		Fair Value
U.S. federal agency securities	$	4,830	$	55	$	-	$	4,885
Municipal securities		492,237		789		(980)		492,046
Certificates of deposit		1,256,649		20,182		(14,865)		1,261,966
Corporate debt securities		17,173		115		-		17,288
	$	1,770,889	$	21,141	$	(15,845)	$	1,776,185

Available-for-sale Securities [Table Text Block]

The cost and fair value of investments in fixed income available-for-sale debt securities, by contractual maturity, as of September 30, 2016 (unaudited), are as follows:

	Cost		Fair Value
Due within one year	$	739,361	$	757,136
Due after one year through three years		164,331		165,934
Due after three years		171,287		174,400
	$	1,074,979	$	1,097,470