Investment in Available-for-Sale Securities (Tables)

12 Months Ended

Dec. 31, 2014

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 December 31, 2014:

	Cost		Unrealized Gains		Unrealized Losses		Fair Value
U.S. federal agency securities	$	49,739	$	68	$	(117)	$	49,690
Municipal securities		441,372		463		(966)		440,869
Certificates of deposit		1,395,990		22,904		(14,861)		1,404,033
Corporate debt securities		37,911		298		-		38,209
	$	1,925,012	$	23,733	$	(15,944)	$	1,932,801

The following is a summary of the Company’s investments in available-for-sale securities as of December 31, 2013: 

	Cost		Unrealized Gains		Unrealized Losses		Fair Value
U.S. federal agency securities	$	90,549	$	93	$	(277)	$	90,365
Municipal securities		735,826		2,175		(6)		737,995
Certificates of deposit		1,539,377		12,281		(19,398)		1,532,260
Corporate debt securities		174,738		275		(9,091)		165,922
	$	2,540,490	$	14,824	$	(28,772)	$	2,526,542

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 December 31, 2014, are as follows:

	Cost		Fair Value
Due within one year	$	712,919	$	714,084
Due after one year through three years		892,901		899,126
Due after three years		319,192		319,591
	$	1,925,012	$	1,932,801