SECURITIES AVAILABLE FOR SALE AND HELD TO MATURITY (Details 3) (USD $)	6 Months Ended
	Jun. 30, 2013 item	Dec. 31, 2012
Securities available for sale
Less Than Twelve Months, Gross Unrealized Losses	$ 9,581,000	$ 282,000
Less Than Twelve Months, Fair Value	298,285,000	46,900,000
Over Twelve Months, Gross Unrealized Losses	2,103,000	2,306,000
Over Twelve Months, Fair Value	10,499,000	15,671,000
Total Gross Unrealized Losses	11,684,000	2,588,000
Total Fair Value	308,784,000	62,571,000
Securities held to maturity
Less Than Twelve Months, Gross Unrealized Losses	675,000	378,000
Less Than Twelve Months, Fair Value	8,825,000	8,129,000
Total Gross Unrealized Losses	675,000	378,000
Total Fair Value	8,825,000	8,129,000
Securities available for sale and held to maturity
Less Than Twelve Months, Gross Unrealized Losses	10,256,000	660,000
Less Than Twelve Months, Fair Value	307,110,000	55,029,000
Over Twelve Months, Gross Unrealized Losses	2,103,000	2,306,000
Over Twelve Months, Fair Value	10,499,000	15,671,000
Total Gross Unrealized Losses	12,359,000	2,966,000
Total Fair Value	317,609,000	70,700,000
Debt Securities
Number of major rating agencies	3
Total unrealized losses	11,684,000	2,588,000
Fair value of investment	568,268,000	466,169,000
Level 3
Debt Securities
Fair value of investment	1,818,000	885,000
Debt securities
Securities available for sale
Less Than Twelve Months, Gross Unrealized Losses	9,394,000	192,000
Less Than Twelve Months, Fair Value	291,973,000	45,490,000
Over Twelve Months, Gross Unrealized Losses	1,775,000	2,033,000
Over Twelve Months, Fair Value	8,827,000	13,944,000
Total Gross Unrealized Losses	11,169,000	2,225,000
Total Fair Value	300,800,000	59,434,000
Debt Securities
Total unrealized losses	11,169,000	2,225,000
Fair value of investment	535,630,000	440,878,000
Municipal bonds and obligations
Securities available for sale
Less Than Twelve Months, Gross Unrealized Losses	1,732,000	100,000
Less Than Twelve Months, Fair Value	15,261,000	4,140,000
Total Gross Unrealized Losses	1,732,000	100,000
Total Fair Value	15,261,000	4,140,000
Debt Securities
Number of AFS investment securities in unrealized loss positions	24
Number of securities in the portfolio of AFS	140
Aggregate unrealized losses as a percentage of the amortized cost of the securities in unrealized loss positions	10.20%
Total unrealized losses	1,732,000	100,000
Fair value of investment	83,031,000	84,757,000
Residential mortgage-backed securities
Debt Securities
Number of AFS investment securities in unrealized loss positions	59
Number of securities in the portfolio of AFS	191
Aggregate unrealized losses as a percentage of the amortized cost of the securities in unrealized loss positions	2.30%
Government guaranteed residential mortgage-backed securities
Securities available for sale
Less Than Twelve Months, Gross Unrealized Losses	216,000	18,000
Less Than Twelve Months, Fair Value	8,932,000	5,108,000
Total Gross Unrealized Losses	216,000	18,000
Total Fair Value	8,932,000	5,108,000
Debt Securities
Total unrealized losses	216,000	18,000
Fair value of investment	38,652,000	43,092,000
Government-sponsored residential mortgage-backed securities
Securities available for sale
Less Than Twelve Months, Gross Unrealized Losses	5,495,000	69,000
Less Than Twelve Months, Fair Value	234,176,000	31,433,000
Over Twelve Months, Gross Unrealized Losses		10,000
Over Twelve Months, Fair Value		5,366,000
Total Gross Unrealized Losses	5,495,000	79,000
Total Fair Value	234,176,000	36,799,000
Debt Securities
Total unrealized losses	5,495,000	79,000
Fair value of investment	354,729,000	278,593,000
Corporate bonds
Securities available for sale
Less Than Twelve Months, Gross Unrealized Losses	1,776,000
Less Than Twelve Months, Fair Value	29,227,000
Over Twelve Months, Gross Unrealized Losses	45,000	108,000
Over Twelve Months, Fair Value	6,955,000	6,892,000
Total Gross Unrealized Losses	1,821,000	108,000
Total Fair Value	36,182,000	6,892,000
Debt Securities
Number of AFS securities remains investment grade rated	8
Number of AFS investment securities in unrealized loss positions	8
Number of securities in the portfolio of AFS	9
Aggregate unrealized losses as a percentage of the amortized cost of the securities in unrealized loss positions	4.80%
Total unrealized losses	1,821,000	108,000
Fair value of investment	39,235,000	10,007,000
Trust preferred securities
Securities available for sale
Less Than Twelve Months, Gross Unrealized Losses	36,000	1,000
Less Than Twelve Months, Fair Value	1,506,000	2,754,000
Over Twelve Months, Gross Unrealized Losses	1,730,000	1,915,000
Over Twelve Months, Fair Value	1,872,000	1,686,000
Total Gross Unrealized Losses	1,766,000	1,916,000
Total Fair Value	3,378,000	4,440,000
Debt Securities
Number of AFS securities remains investment grade rated	6
Number of AFS securities graded at least one below investment grade rating	4
Number of AFS investment securities in unrealized loss positions	3
Number of securities in the portfolio of AFS	6
Aggregate unrealized losses as a percentage of the amortized cost of the securities in unrealized loss positions	34.30%
Total unrealized losses	1,766,000	1,916,000
Fair value of investment	16,757,000	20,957,000
Other bonds and obligations
Securities available for sale
Less Than Twelve Months, Gross Unrealized Losses	139,000	4,000
Less Than Twelve Months, Fair Value	2,871,000	2,055,000
Total Gross Unrealized Losses	139,000	4,000
Total Fair Value	2,871,000	2,055,000
Debt Securities
Number of AFS investment securities in unrealized loss positions	2
Number of securities in the portfolio of AFS	9
Aggregate unrealized losses as a percentage of the amortized cost of the securities in unrealized loss positions	4.60%
Total unrealized losses	139,000	4,000
Fair value of investment	3,226,000	3,472,000
Tax advantaged economic development bonds
Securities held to maturity
Less Than Twelve Months, Gross Unrealized Losses	675,000	378,000
Less Than Twelve Months, Fair Value	8,825,000	8,129,000
Total Gross Unrealized Losses	675,000	378,000
Total Fair Value	8,825,000	8,129,000
Debt Securities
Aggregate unrealized losses as a percentage of the amortized cost of the securities in unrealized loss positions	7.10%
Number of HTM investment securities in unrealized loss positions	2
Number of securities in the portfolio of HTM	8
Trust preferred securities except Mezzanine Class B tranche
Debt Securities
Total unrealized losses	1,600,000
Fair value of investment	2,800,000
Amount of security issued by banking and insurance entities	360,000,000
Protection from credit loss afforded in excess subordination above current and projected losses	46,000,000
Trust preferred securities except Mezzanine Class B tranche | Level 3
Debt Securities
Fair value of investment	1,000,000
Marketable equity securities
Securities available for sale
Less Than Twelve Months, Gross Unrealized Losses	187,000	90,000
Less Than Twelve Months, Fair Value	6,312,000	1,410,000
Over Twelve Months, Gross Unrealized Losses	328,000	273,000
Over Twelve Months, Fair Value	1,672,000	1,727,000
Total Gross Unrealized Losses	515,000	363,000
Total Fair Value	7,984,000	3,137,000
Debt Securities
Number of AFS investment securities in unrealized loss positions	5
Number of securities in the portfolio of AFS	23
Aggregate unrealized losses as a percentage of the amortized cost of the securities in unrealized loss positions	6.10%
Total unrealized losses	515,000	363,000
Fair value of investment	$ 32,638,000	$ 25,291,000