CONTINGENCIES - Condensed OCI (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Condensed Financial Statements, Captions [Line Items]
NET INCOME (LOSS)	$ 7,347	$ 8,177	$ (3,207)	$ (1,049)	$ 10,524	$ 8,231	$ 46,501	$ 1,021	$ 11,268	$ 66,277	$ 46,436
OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAXES (BENEFIT):
Net unrealized gain (loss) on derivatives, net of taxes (benefit)									0	7,277	6,155
COMPREHENSIVE INCOME (LOSS)									11,268	73,554	52,591
Parent Company [Member]
Condensed Financial Statements, Captions [Line Items]
NET INCOME (LOSS)									11,268	66,277	46,436
OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAXES (BENEFIT):
Net unrealized gain (loss) on derivatives, net of taxes (benefit)									0	7,277	6,155
COMPREHENSIVE INCOME (LOSS)									$ 11,268	$ 73,554	$ 52,591