Investment Securities:

9 Months Ended

Sep. 30, 2015

Investments, Debt and Equity Securities [Abstract]

Investment [Text Block]

Investment Securities

Our investment securities consist of certificates of deposit, corporate bonds, U.S. Treasury securities, commercial paper and federal tax-exempt state and municipal government debt. All investment securities are considered available-for-sale and are “investment grade”, carried at fair value, and there have been no gains or losses on their disposal. Unrealized gains and losses on available-for-sale securities, net of tax, are included in accumulated other comprehensive loss in the stockholders' equity section of our consolidated balance sheets. We had no gross unrealized gains or losses on available-for-sale securities at September 30, 2015 or December 31, 2014. The scheduled maturities of the debt securities are between 2015 and 2036 and are all callable within one year. The investment securities consist of the following at September 30, 2015 and December 31, 2014:

	September 30, 2015		December 31, 2014
Federal tax-exempt debt securities	$	3,463	$	15,013
Corporate bonds	25,253		46,209
U.S. Treasury securities	4,039		—
Commercial paper	3,687		3,846
Certificates of deposit	2,253		5,884
	$	38,695	$	70,952