Investments (Tables)

3 Months Ended

Mar. 31, 2013

Investments, Debt and Equity Securities [Abstract]

Available-for-sale Securities

The following tables report the cost and carrying value of available-for-sale investments at March 31, 2013 and December 31, 2012 (in thousands):

March 31, 2013	Cost		Gross Unrealized Gains		Gross Unrealized Losses			Carrying Value
Debt securities:
Corporate bonds	$	8,748	$	286	$	(48	)	$	8,986
Marketable equity securities	31,569		8,395		(560		)	39,404
Total	$	40,317	$	8,681	$	(608	)	$	48,390

December 31, 2012	Cost		Gross Unrealized Gains		Gross Unrealized Losses			Carrying Value
Debt securities:
Corporate bonds	$	7,758	$	324	$	(56	)	$	8,026
Marketable equity securities	33,847		7,212		(621		)	40,438
Total	$	41,605	$	7,536	$	(677	)	$	48,464

Schedule of Unrealized Loss on Investments

The following tables summarize the market value of those investments in an unrealized loss position for periods less than or greater than 12 months (in thousands):

	March 31, 2013				December 31, 2012
Less than 12 months	Fair Value		Gross Unrealized Loss		Fair Value		Gross Unrealized Loss
Debt securities:
Corporate bonds	$	1,662	$	10	$	768	$	12
Marketable equity securities	2,315		249		5,193		615
Total	$	3,977	$	259	$	5,961	$	627

	March 31, 2013				December 31, 2012
Greater than 12 months	Fair Value		Gross Unrealized Loss		Fair Value		Gross Unrealized Loss
Debt securities:
Corporate bonds	$	2,210	$	38	$	2,204	$	44
Marketable equity securities	1,468		311		45		6
Total	$	3,678	$	349	$	2,249	$	50