GOODWILL AND IDENTIFIABLE INTANGIBLE ASSETS (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 48,390	$ 74,362
Accumulated Amortization	(30,959)	(58,848)
Net Carrying Amount	17,431	15,514
Finite-Lived Intangible Assets, Future Amortization Expense [Abstract]
2013	4,441
2014	3,597
2015	2,804
2016	2,094
2017	1,478
Thereafter	3,017
Total	17,431
Components of goodwill [Abstract]
Goodwill	374,527	349,874	302,516
Goodwill, Activity	24,653	47,358
Accumulated impairment	(4,824)	(4,824)	(4,824)
Accumulated impairment, Activity	0	0
Goodwill	369,703	345,050	297,692
Goodwill, net, Activity	24,653	47,358
Key economic assumptions used to estimate the value of the MSRs [Abstract]
Weighted-average contractual life (in years)	18.8	19.5
Weighted-average constant prepayment rate (CPR) (in hundredths)	34.40%	24.70%
Weighted-average discount rate (in hundredths)	3.10%	3.20%
Core Deposit Intangibles [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	38,958	64,610
Accumulated Amortization	(24,466)	(53,091)
Net Carrying Amount	14,492	11,519
Other Intangibles [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	9,432	9,752
Accumulated Amortization	(6,493)	(5,757)
Net Carrying Amount	2,939	3,995
Mortgage Servicing Rights [Member]
Servicing Asset at Fair Value, Amount [Roll Forward]
Carrying value before valuation allowance at beginning of period	2,145	2,773
Additions	0	239
Amortization	(687)	(867)
Carrying value before valuation allowance at end of period	1,458	2,145
Valuation Allowance for Impairment of Recognized Servicing Assets [Roll Forward]
Valuation allowance balance at beginning of period	(397)	(351)
Impairment charges	(279)	(526)
Impairment recoveries	246	480
Valuation allowance balance at end of period	(430)	(397)
Net carrying value at end of period	1,028	1,748
Fair value of MSRs at end of period	1,028	1,748
Principal balance of loans sold during the year	3,554	34,625
Principal balance of loans serviced for others	367,241	458,836
Custodial escrow balances maintained in connection with loans serviced for others	$ 5,011	$ 5,823

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Escrow deposits related to loans serviced for others.

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Outstanding balance of underlying mortgage loans serviced for others

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The accumulated amount of amortization of a major finite-lived intangible asset class. A major class is composed of intangible assets that can be grouped together because they are similar, either by their nature or by their use in the operations of a company.

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Carrying amount as of the balance sheet date, which is the cumulative amount paid and (if applicable) the fair value of any noncontrolling interest in the acquiree, adjusted for any amortization recognized prior to the adoption of any changes in generally accepted accounting principles (as applicable) and for any impairment charges, in excess of the fair value of net assets acquired in one or more business combination transactions.

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Gross amount, as of the balance sheet date, of the cumulative amount paid and (if applicable) the fair value of any noncontrolling interest in the acquiree, adjusted for any amortization recognized prior to the adoption of any changes in generally accepted accounting principles (as applicable), in excess of the fair value of net assets acquired in one or more business combination transactions.

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Loss recognized during the period that results from the write-down of goodwill after comparing the implied fair value of reporting unit goodwill with the carrying amount of that goodwill. Goodwill is assessed at least annually for impairment.

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