SECURITIES AVAILABLE FOR SALE AND HELD TO MATURITY (Details 3) (USD $)	6 Months Ended
	Jun. 30, 2014 item	Dec. 31, 2013
Securities available for sale
Less Than Twelve Months, Gross Unrealized Losses	$ 1,540,000	$ 15,203,000
Less Than Twelve Months, Fair Value	181,161,000	510,469,000
Over Twelve Months, Gross Unrealized Losses	6,468,000	2,096,000
Over Twelve Months, Fair Value	185,367,000	5,675,000
Total Gross Unrealized Losses	8,008,000	17,299,000
Total Fair Value	366,528,000	516,144,000
Securities held to maturity
Less Than Twelve Months, Gross Unrealized Losses		57,000
Less Than Twelve Months, Fair Value		9,429,000
Over Twelve Months, Gross Unrealized Losses	199,000	357,000
Over Twelve Months, Fair Value	7,932,000	7,901,000
Total Gross Unrealized Losses	199,000	414,000
Total Fair Value	7,932,000	17,330,000
Securities available for sale and held to maturity
Less Than Twelve Months, Gross Unrealized Losses	1,540,000	15,260,000
Less Than Twelve Months, Fair Value	181,161,000	519,898,000
Over Twelve Months, Gross Unrealized Losses	6,667,000	2,453,000
Over Twelve Months, Fair Value	193,299,000	13,576,000
Total Gross Unrealized Losses	8,207,000	17,713,000
Total Fair Value	374,460,000	533,474,000
Debt Securities
Total unrealized losses	8,008,000	17,299,000
Fair value of investment	1,080,668,000	760,048,000
Level 3
Debt Securities
Fair value of investment	2,217,000	1,964,000
Trust preferred securities | Level 3
Debt Securities
Fair value of investment	1,400,000
Debt securities
Securities available for sale
Less Than Twelve Months, Gross Unrealized Losses	1,068,000	15,086,000
Less Than Twelve Months, Fair Value	163,647,000	508,816,000
Over Twelve Months, Gross Unrealized Losses	6,225,000	1,878,000
Over Twelve Months, Fair Value	182,610,000	3,893,000
Total Gross Unrealized Losses	7,293,000	16,964,000
Total Fair Value	346,257,000	512,709,000
Debt Securities
Total unrealized losses	7,293,000	16,964,000
Fair value of investment	1,033,050,000	738,075,000
Debt securities | Municipal bonds and obligations
Securities available for sale
Less Than Twelve Months, Gross Unrealized Losses	2,000	1,657,000
Less Than Twelve Months, Fair Value	401,000	17,776,000
Over Twelve Months, Gross Unrealized Losses	511,000	313,000
Over Twelve Months, Fair Value	12,503,000	1,854,000
Total Gross Unrealized Losses	513,000	1,970,000
Total Fair Value	12,904,000	19,630,000
Debt Securities
Number of securities in the portfolio of AFS	193
Number of AFS investment securities in unrealized loss positions	19
Aggregate unrealized losses as a percentage of the amortized cost of the securities in unrealized loss positions	3.80%
Total unrealized losses	513,000	1,970,000
Fair value of investment	137,414,000	77,671,000
Debt securities | Residential mortgage-backed securities
Debt Securities
Number of securities in the portfolio of AFS	240
Number of AFS investment securities in unrealized loss positions	55
Aggregate unrealized losses as a percentage of the amortized cost of the securities in unrealized loss positions	1.60%
Debt securities | Government guaranteed residential mortgage-backed securities
Securities available for sale
Less Than Twelve Months, Gross Unrealized Losses	43,000	658,000
Less Than Twelve Months, Fair Value	11,313,000	35,631,000
Over Twelve Months, Gross Unrealized Losses	116,000
Over Twelve Months, Fair Value	4,437,000
Total Gross Unrealized Losses	159,000	658,000
Total Fair Value	15,750,000	35,631,000
Debt Securities
Total unrealized losses	159,000	658,000
Fair value of investment	79,723,000	78,771,000
Debt securities | Government-sponsored residential mortgage-backed securities
Securities available for sale
Less Than Twelve Months, Gross Unrealized Losses	1,022,000	10,783,000
Less Than Twelve Months, Fair Value	151,880,000	423,203,000
Over Twelve Months, Gross Unrealized Losses	4,250,000
Over Twelve Months, Fair Value	160,445,000
Total Gross Unrealized Losses	5,272,000	10,783,000
Total Fair Value	312,325,000	423,203,000
Debt Securities
Total unrealized losses	5,272,000	10,783,000
Fair value of investment	797,091,000	522,658,000
Debt securities | Corporate bonds
Securities available for sale
Less Than Twelve Months, Gross Unrealized Losses		1,822,000
Less Than Twelve Months, Fair Value		29,124,000
Total Gross Unrealized Losses		1,822,000
Total Fair Value		29,124,000
Debt Securities
Total unrealized losses		1,822,000
Fair value of investment		39,280,000
Debt securities | Trust preferred securities
Securities available for sale
Over Twelve Months, Gross Unrealized Losses	1,276,000	1,565,000
Over Twelve Months, Fair Value	2,288,000	2,039,000
Total Gross Unrealized Losses	1,276,000	1,565,000
Total Fair Value	2,288,000	2,039,000
Debt Securities
Number of securities in the portfolio of AFS	2
Number of AFS securities remains investment grade rated	1
Number of AFS investment securities in unrealized loss positions	5
Aggregate unrealized losses as a percentage of the amortized cost of the securities in unrealized loss positions	35.80%
Total unrealized losses	1,276,000	1,565,000
Fair value of investment	15,657,000	16,611,000
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	44,000,000
Number of AFS securities graded at least one below investment grade rating	1
Debt securities | Other bonds and obligations
Securities available for sale
Less Than Twelve Months, Gross Unrealized Losses	1,000	166,000
Less Than Twelve Months, Fair Value	53,000	3,082,000
Over Twelve Months, Gross Unrealized Losses	72,000
Over Twelve Months, Fair Value	2,937,000
Total Gross Unrealized Losses	73,000	166,000
Total Fair Value	2,990,000	3,082,000
Debt Securities
Number of securities in the portfolio of AFS	8
Number of AFS investment securities in unrealized loss positions	4
Aggregate unrealized losses as a percentage of the amortized cost of the securities in unrealized loss positions	2.40%
Total unrealized losses	73,000	166,000
Fair value of investment	3,165,000	3,084,000
Debt securities | Tax advantaged economic development bonds
Securities held to maturity
Less Than Twelve Months, Gross Unrealized Losses		57,000
Less Than Twelve Months, Fair Value		9,429,000
Over Twelve Months, Gross Unrealized Losses	199,000	357,000
Over Twelve Months, Fair Value	7,932,000	7,901,000
Total Gross Unrealized Losses	199,000	414,000
Total Fair Value	7,932,000	17,330,000
Debt Securities
Aggregate unrealized losses as a percentage of the amortized cost of the securities in unrealized loss positions	2.50%
Number of HTM investment securities in unrealized loss positions	1
Number of securities in the portfolio of HTM	7
Debt securities | Mezzanine Class B tranche
Debt Securities
Total unrealized losses	1,100,000
Fair value of investment	2,800,000
Marketable equity securities
Securities available for sale
Less Than Twelve Months, Gross Unrealized Losses	472,000	117,000
Less Than Twelve Months, Fair Value	17,514,000	1,653,000
Over Twelve Months, Gross Unrealized Losses	243,000	218,000
Over Twelve Months, Fair Value	2,757,000	1,782,000
Total Gross Unrealized Losses	715,000	335,000
Total Fair Value	20,271,000	3,435,000
Debt Securities
Number of securities in the portfolio of AFS	29
Number of AFS investment securities in unrealized loss positions	9
Aggregate unrealized losses as a percentage of the amortized cost of the securities in unrealized loss positions	3.40%
Total unrealized losses	715,000	335,000
Fair value of investment	$ 47,618,000	$ 21,973,000