Marketable Securities

Marketable securities consist primarily of certificates of deposit and corporate bonds with maturities greater than three months and up to ten years at the time of purchase as well as marketable equity securities. These securities, which are classified as available-for-sale, are carried at fair value, with unrealized gains and losses, net of any tax effect, reported in stockholders’ equity as accumulated other comprehensive income (loss). For the three months ended March 31, 2015, gains of $96 were reclassified from accumulated other comprehensive income and recognized in the income statement in other income compared to gains of $2 for the comparable period in 2014. These securities are classified as current and non-current marketable securities based upon their maturities. Amortization of premiums and discounts is included in interest income. For the three months ended March 31, 2015, the amortization of bond premiums totals $345 compared to $137 for the comparable period in 2014. The values of these securities may fluctuate as a result of changes in equity values, market interest rates and credit risk. The schedule of maturities at March 31, 2015 and December 31, 2014 are as follows:



	Maturities as of March 31, 2015				Maturities as of December 31, 2014
	1 Year or Less		1 to 10 Years		1 Year or Less		1 to 10 Years
Corporate bonds	$	10,991	$	90,907	$	11,363	$	90,446
Certificates of deposit	16,346		—		19,835		—
Total	$	27,337	$	90,907	$	31,198	$	90,446