DERIVATIVE INSTRUMENTS (Details 4) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013 counterparty	Dec. 31, 2012
Credit Risk
Number of counterparties to whom derivative liabilities are owed	1
Derivative Assets
Gross amounts of recognized assets	$ 5,592	$ 48,525
Gross amounts offset in the balance sheet	0	0
Net amounts of assets presented in the balance sheet	5,592	48,525
Gross amounts not offset in the balance sheet derivative assets:
Derivative instruments	(1,049)	(13,537)
Cash collateral received	0	0
Net amount	4,543	34,988
Derivative Liabilities
Gross amounts of recognized liabilities	4,542	16,551
Gross amounts offset in the balance sheet	0	0
Net amounts of liabilities presented in the balance sheet	4,542	16,551
Gross amounts not offset in the balance sheet derivative liabilities:
Derivative Instruments	(1,049)	(13,537)
Cash collateral pledged	0	0
Net amount	$ 3,493	$ 3,014