Investments (Tables)

3 Months Ended

Mar. 31, 2013

Investments, Debt and Equity Securities [Abstract]

Investments

The following table summarizes the Company’s available-for-sale securities on hand as of March 31, 2013 and December 31, 2012 (in thousands):

	Investments in marketable securities
	Cost		Gross Unrealized Losses			Gross Unrealized Gains		Estimated Fair Value
Marketable securities at March 31, 2013	$	34,751	$	(13,072	)	$	1,819	$	23,498
Marketable securities at December 31, 2012	$	34,786	$	(10,443	)	$	2,722	$	27,065

Available-for-sale securities, continuous unrealized loss position, fair value

The following table summarizes the gross unrealized losses on investment securities for which other-than-temporary impairments have not been recognized and the fair values of those securities, aggregated by the length of time the individual securities have been in a continuous unrealized loss position, at March 31, 2013 (in thousands):

	Less than twelve months					Twelve months or more					Total
	Unrealized Losses			Fair Value		Unrealized Losses			Fair Value		Unrealized Losses			Fair Value
Marketable equity securities	$	(1,270	)	$	3,861	$	(11,802	)	$	10,874	$	(13,072	)	$	14,735