Investments (Tables)

6 Months Ended

Jun. 30, 2011

Investments, Debt and Equity Securities [Abstract]

Amortized Cost and Fair Value of Investments

The amortized cost and fair value of these investments were as follows (in thousands):

	June 30, 2011							December 31, 2010
	Cost or Amortized Cost		Net Unrealized Gain (Loss)			Fair Value		Cost or Amortized Cost		Net Unrealized Gain (Loss)			Fair Value
Debt	$	7,150	$	(250	)	$	6,900	$	7,150	$	(450	)	$	6,700
Equity(1)		2,000		800			2,800		2,000		(100	)		1,900
Total	$	9,150	$	550		$	9,700	$	9,150	$	(550	)	$	8,600

(1)  As of June 30, 2011 and December 31, 2010, cost and fair value of the two preferred stock investments were $0.

Changes in Fair Value of Investments

The changes in fair value of the investments were recorded as follows (in thousands):

	Quarters Ended June 30,				Six Months Ended June 30,
	2011		2010		2011		2010
Debt Securities
Fair value at beginning of period	$	6,800	$	10,500	$	6,700	$	10,900
Temporary impairment credits (charges), net		100		—		200		(400	)
Fair value at end of period	$	6,900	$	10,500	$	6,900	$	10,500
Equity Securities
Fair value at beginning of period	$	2,400	$	2,100	$	1,900	$	2,200
Temporary impairment credits (charges), net		400		—		900		(100	)
Fair value at end of period	$	2,800	$	2,100	$	2,800	$	2,100
Total
Fair value at beginning of period	$	9,200	$	12,600	$	8,600	$	13,100
Temporary impairment credits (charges), net		500		—		1,100		(500	)
Fair value at end of period	$	9,700	$	12,600	$	9,700	$	12,600