Fair Values of Financial Instruments (Tables)

9 Months Ended

Sep. 30, 2012

Fair Values of Financial Instruments [Abstract]

Fair value measurements by level for assets and liabilities measured at fair value on a recurring basis

	Level 1				Level 2				Level 3				Total
Description	2012		2011		2012		2011		2012		2011		2012		2011
Investments	$	2,804	$	—	$	—	$	25,311	$	923	$	902	$	3,727	$	26,213
Total assets at fair value	$	2,804	$	—	$	—	$	25,311	$	923	$	902	$	3,727	$	26,213

Changes in Level 3 instruments

	For the Three Months Ended					For the Nine Months Ended
	September 30,					September 30,
	2012		2011			2012			2011
Balance at beginning of period	$	923	$	954		$	902		$	951
Losses included in earnings		—		(21	)		(11	)		(21	)
Gains included in other comprehensive income		—		—			32			3
Balance as of September 30	$	923	$	933		$	923		$	933