DISCLOSURES ABOUT FAIR VALUE OF FINANCIAL INSTRUMENTS - Reconciliation of the beginning and ending balances of recurring fair value measurements using significant unobservable (Details 2) (Fair Value, Measurements, Recurring, Available-For-Sale Securities, USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Fair Value, Measurements, Recurring | Available-For-Sale Securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	$ 1,073	$ 1,160	$ 1,090	$ 936
Total realized and unrealized gains and losses
Amortization included in net income	2	2	4	4
Unrealized gains included in other comprehensive income	75	12	60	237
Purchases
Pay downs	(4)	(5)	(8)	(8)
Transfers in and/or out of Level 3
Ending balance	1,146	1,169	1,146	1,169
Total gains or losses for the period included in net income attributable to the change in unrealized gains or losses related to assets and liabilities still held at the reporting date