AVAILABLE-FOR-SALE SECURITIES (Tables)

6 Months Ended

Jun. 30, 2011

AVAILABLE-FOR-SALE SECURITIES

Available-for-sale securities roll forward from cost to fair value

	June 30, 2011			December 31, 2010
Available-for-sale securities in an unrealized gain position
Cost	$	47,689		$	50,958
Unrealized gains in accumulated other comprehensive income		48,381			48,151
Estimated fair value		96,070			99,109
Available-for-sale securities in an unrealized loss position
Cost		6,038			—
Unrealized losses in accumulated other comprehensive income		(1,454	)		—
Estimated fair value		4,584			—
Total estimated fair value of available-for-sale securities	$	100,654		$	99,109