Investment Income and Other (Tables)

6 Months Ended

Jun. 30, 2012

Nonoperating Income (Expense) [Abstract]

Schedule of Investment Income and Other

The following table summarizes our investment income and other (in thousands):

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2012		2011		2012		2011
Dividend income	$	970	$	1,020	$	1,945	$	2,156
Realized gains on sales of marketable securities	30		8,655		30		8,809
Other revenue	84		115		169		237
	$	1,084	$	9,790	$	2,144	$	11,202