ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Changes in accumulated other comprehensive income (loss) by component
Balance at the beginning of the period	$ (9,575)
Other comprehensive income (loss)	8	(308)
Balance at the end of the period	(9,567)
Gains and Losses on Cash flow hedges
Changes in accumulated other comprehensive income (loss) by component
Balance at the beginning of the period	(9,575)
Other comprehensive income (loss) before reclassifications	(511)
Amounts reclassified from accumulated other comprehensive income	519
Other comprehensive income (loss)	8
Balance at the end of the period	$ (9,567)