DERIVATIVE INSTRUMENTS (Schedule of Interest Rate Derivatives) (Details) (Interest rate swap agreements, USD $) In Thousands, unless otherwise specified	Dec. 31, 2011
Derivative [Line Items]
Notional Amount	$ 50,000
Interest Rate Paid	5.14%
Interest Rate Received	2.50%
Fair Value	(807)
Maturity Date March 30, 2012
Derivative [Line Items]
Notional Amount	25,000
Interest Rate Paid	4.71%
Interest Rate Received	2.19%
Fair Value	(159)
Maturity Date December 15, 2012
Derivative [Line Items]
Notional Amount	25,000
Interest Rate Paid	5.57%
Interest Rate Received	2.80%
Fair Value	$ (648)