INCOME TAXES (Details 2) (USD $)	Dec. 31, 2014	Dec. 31, 2013
Deferred tax assets:
Allowance for loan losses	$ 14,710,000	$ 14,391,000
Tax credit carryforwards	11,238,000	9,867,000
Net unrealized loss on swaps, securities available for sale, and pension in OCI		5,740,000
Employee benefit plans	6,103,000	5,331,000
Purchase accounting adjustments	7,126,000	18,350,000
Net operating loss and capital loss carryforwards	5,538,000	7,731,000
Other	2,134,000us-gaap_DeferredTaxAssetsOther	2,256,000us-gaap_DeferredTaxAssetsOther
Deferred tax assets, net before valuation allowances	46,849,000us-gaap_DeferredTaxAssetsGross	63,666,000us-gaap_DeferredTaxAssetsGross
Valuation allowance	(968,000)	(998,000)
Deferred tax assets, net of valuation allowances	45,881,000us-gaap_DeferredTaxAssetsNet	62,668,000us-gaap_DeferredTaxAssetsNet
Deferred tax liabilities:
Investments	(773,000)	(896,000)
Premises and equipment	(4,575,000)	(2,836,000)
Net unrealized gain on swaps, securities available for sale, and pension in OCI	(3,823,000)
Intangible amortization	(7,934,000)	(8,225,000)
Deferred tax liabilities	(17,105,000)us-gaap_DeferredIncomeTaxLiabilities	(11,957,000)us-gaap_DeferredIncomeTaxLiabilities
Deferred Tax Assets, Net, Total	28,776,000us-gaap_DeferredTaxAssetsLiabilitiesNet	50,711,000us-gaap_DeferredTaxAssetsLiabilitiesNet
Decrease in net deferred tax asset	21,900,000
Deferred tax expense recognized due to decrease in equity	$ 10,800,000

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