CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Statement Of Income And Comprehensive Income Abstract
NET INCOME (LOSS)	$ 8,177	$ 8,231	$ 3,921	$ 57,986
OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAXES (BENEFIT):
Net unrealized gain (loss) on investments, net of taxes (benefit)	0	0	0	0
Net unrealized gain (loss) on derivatives, net of taxes (benefit)	0	1,039	0	9,174
COMPREHENSIVE INCOME (LOSS)	$ 8,177	$ 9,270	$ 3,921	$ 67,160