Cash, Equivalents and Marketable Securities (Tables)

6 Months Ended

Jun. 30, 2013

Cash And Cash Equivalents [Abstract]

Summary of Investments

The following is a summary of such investments (in 000’s):

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated fair Value		Cash		Marketable Security
											Current		Long Term
June 30, 2013
Cash and equivalents	$	121,103	$	—	$	—	$	121,103	$	121,103	$	—	$	—
Bank CDs (including restricted certificate of deposit of $250)		252		—		—		252		—		252		—
Money market currency funds		3,060		—		—		3,060		—		3,060		—
Other securities (included in other assets)		1,747		1,702		—		3,449		—		—		3,449
Total investments	$	126,162	$	1,702	$	—	$	127,864	$	121,103	$	3,312	$	3,449
December 31, 2012
Cash and equivalents	$	139,698	$	—	$	—	$	139,698	$	139,698	$	—	$	—
Bank CDs (including restricted certificate of deposit of $250)		987		—		—		987		—		987		—
Money market currency funds		2,323		—		—		2,323		—		2,323		—
Other securities (included in other assets)		1,747		733		—		2,480		—		—		2,480
Total investments	$	144,755	$	733	$	—	$	145,488	$	139,698	$	3,310	$	2,480