ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Changes in accumulated other comprehensive income (loss) by component
Balance at the beginning of the period			$ (9,575)
Other comprehensive income (loss)	1,794	(2,422)	1,802	(2,730)
Balance at the end of the period	(7,773)		(7,773)
Gains and Losses on Cash Flow Hedges
Changes in accumulated other comprehensive income (loss) by component
Balance at the beginning of the period	(9,567)		(9,575)
Other comprehensive income before reclassifications	1,266		755
Amounts reclassified from accumulated other comprehensive income (loss)	528		1,047
Other comprehensive income (loss)	1,794		1,802
Balance at the end of the period	$ (7,773)		$ (7,773)