CASH AND SECURITIES (Held-to-maturity Securities) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	$ 86,452	$ 75,438
Gross Unrealized Gains	6,193	4,671
Gross Unrealized Losses	(187)	(2)
Fair Value	92,458	80,107
Percent of Total	100.00%	100.00%
Total municipal bonds [Member]
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	84,402	74,188
Gross Unrealized Gains	6,193	4,671
Gross Unrealized Losses	(187)	0
Fair Value	90,408	78,859
Percent of Total	97.80%	98.40%
Taxable municipal bonds [Member]
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	10,326	7,496
Gross Unrealized Gains	436	390
Gross Unrealized Losses	(157)	0
Fair Value	10,605	7,886
Percent of Total	11.50%	9.80%
Tax exempt municipal bonds [Member]
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	74,076	66,692
Gross Unrealized Gains	5,757	4,281
Gross Unrealized Losses	(30)	0
Fair Value	79,803	70,973
Percent of Total	86.30%	88.60%
Corporate bonds [Member]
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	2,050	1,250
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	(2)
Fair Value	$ 2,050	$ 1,248
Percent of Total	2.20%	1.60%