Marketable Securities and Equity-Method Affiliates (Tables)

6 Months Ended

Jun. 30, 2012

Marketable Securities and Equity-Method Affiliates [Abstract]

Schedule of Marketable Securities by Major Security Type

The amortized cost, gross unrealized gains, gross unrealized losses and fair value for marketable securities by major security type were as follows:

	June 30, 2012
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
Time deposits	$	6,623	$	—	$	—	$	6,623
Auction rate securities	—		—		—		—
	$	6,623	$	—	$	—	$	6,623

	December 31, 2011
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Time deposits	$	5,359	$	—	$	—		$	5,359
Auction rate securities	11,972		—		(921		)	11,051
	$	17,331	$	—	$	(921	)	$	16,410

Schedule of Maturities of Debt Securities

Maturities of debt securities were as follows:

	June 30, 2012				December 31, 2011
	Amortized Cost		Fair Value		Amortized Cost		Fair Value
Due less than one year	$	6,623	$	6,623	$	5,359	$	5,359
Due after one year through five years	—		—		—		—
Due after ten years	—		—		11,972		11,051
	$	6,623	$	6,623	$	17,331	$	16,410