Investment in Available-for-Sale Securities (Tables)

6 Months Ended

Jun. 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 June 30, 2016 (unaudited):

	Cost		Unrealized Gains		Unrealized Losses		Fair Value
U.S. federal agency securities	$	4,875	$	73	$	-	$	4,948
Municipal securities		403,138		2,849		(98)		405,889
Certificates of deposit		947,697		26,293		(10,793)		963,197
Corporate debt securities		16,921		199		-		17,120
	$	1,372,631	$	29,414	$	(10,891)	$	1,391,154

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 June 30, 2016 (unaudited), are as follows:

	Cost		Fair Value
Due within one year	$	975,209	$	987,632
Due after one year through three years		220,371		222,476
Due after three years		177,051		181,046
	$	1,372,631	$	1,391,154