BORROWINGS (Details) (USD $)	12 Months Ended
Dec. 31, 2011	Dec. 31, 2010
Total outstanding borrowings [Abstract]
Carrying value	$ 830,329,000	$ 830,484,000
Subordinated debt held by unconsolidated subsidiary trust, discount	479,000	503,000
Weighted-average interest rate on borrowings (in hundredths)	4.25%	4.29%
Borrowings by contractual maturity date [Abstract]
Carrying value	830,329,000	830,484,000
Weighted Average Interest Rate (in hundredths)	3.84%
Number of wholly owned, unconsolidated subsidiary trusts	2
Percent ownership of unconsolidated subsidiary trusts (in hundredths)	100.00%
Interest Rate Swap [Member] \| Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Interest rate swap agreement interest rate (in hundredths)	6.43%
Interest rate swap agreement term (in years)	5 Y
Additional interest expense recognized, interest rate swap agreement	3,200,000	3,400,000
Federal Home Loan Bank Advances [Member]
Total outstanding borrowings [Abstract]
Carrying value	728,235,000	728,428,000
Borrowings by contractual maturity date [Abstract]
Carrying value	728,235,000	728,428,000
Community Statutory Trust III [Member]
Borrowings by contractual maturity date [Abstract]
Call provision	5 year beginning 2006
Junior Subordinated Debenture Owed to Unconsolidated Subsidiary Trust [Abstract]
Issuance Date	7/31/2001
Issuance Amount	24,450,000
Variable Interest Rate Basis	3 month LIBOR
Variable Interest Rate, Basis Spread (in hundredths)	3.58%
Effective Interest Rate (in hundredths)	4.01%
Maturity Date	7/31/2031
Call Provision	5 year beginning 2006
Debt Instrument, Call Date, Earliest	Jul. 31, 2006
Current call price	Par
Community Capital Trust IV [Member]
Borrowings by contractual maturity date [Abstract]
Call provision	5 year beginning 2011
Junior Subordinated Debenture Owed to Unconsolidated Subsidiary Trust [Abstract]
Issuance Date	12/8/2006
Issuance Amount	75,000,000
Variable Interest Rate Basis	3 month LIBOR
Variable Interest Rate, Basis Spread (in hundredths)	1.65%
Effective Interest Rate (in hundredths)	2.20%
Maturity Date	12/15/2036
Call Provision	5 year beginning 2011
Debt Instrument, Call Date, Earliest	Dec. 08, 2011
Current call price	Par
Capital Lease Obligations [Member]
Total outstanding borrowings [Abstract]
Carrying value	46,000	6,000
Borrowings by contractual maturity date [Abstract]
Carrying value	46,000	6,000
Commercial Loan Sold With Recourse [Member]
Total outstanding borrowings [Abstract]
Carrying value	0	26,000
Borrowings by contractual maturity date [Abstract]
Carrying value	0	26,000
Subordinated Debt Held By Unconsolidated Subsidiary Trust [Member]
Total outstanding borrowings [Abstract]
Carrying value	102,048,000	102,024,000
Borrowings by contractual maturity date [Abstract]
Carrying value	102,048,000	102,024,000
July 15, 2012 [Member] \| Capital Lease Obligations [Member]
Total outstanding borrowings [Abstract]
Carrying value	3,000
Borrowings by contractual maturity date [Abstract]
Carrying value	3,000
Weighted Average Interest Rate (in hundredths)	4.30%
January 17, 2013 [Member] \| Federal Home Loan Bank Advances [Member]
Total outstanding borrowings [Abstract]
Carrying value	235,000
Borrowings by contractual maturity date [Abstract]
Carrying value	235,000
Weighted Average Interest Rate (in hundredths)	4.00%
April 1, 2013 [Member] \| Capital Lease Obligations [Member]
Total outstanding borrowings [Abstract]
Carrying value	6,000
Borrowings by contractual maturity date [Abstract]
Carrying value	6,000
Weighted Average Interest Rate (in hundredths)	5.55%
January 1, 2014 [Member] \| Capital Lease Obligations [Member]
Total outstanding borrowings [Abstract]
Carrying value	5,000
Borrowings by contractual maturity date [Abstract]
Carrying value	5,000
Weighted Average Interest Rate (in hundredths)	7.42%
February 1, 2015 [Member] \| Capital Lease Obligations [Member]
Total outstanding borrowings [Abstract]
Carrying value	32,000
Borrowings by contractual maturity date [Abstract]
Carrying value	32,000
Weighted Average Interest Rate (in hundredths)	3.25%
June 22, 2015 [Member] \| Federal Home Loan Bank Advances [Member]
Total outstanding borrowings [Abstract]
Carrying value	50,000,000
Borrowings by contractual maturity date [Abstract]
Call provision	Callable
Carrying value	50,000,000
Weighted Average Interest Rate (in hundredths)	3.62%
Junior Subordinated Debenture Owed to Unconsolidated Subsidiary Trust [Abstract]
Call Provision	Callable
October 14, 2015 [Member] \| Federal Home Loan Bank Advances [Member]
Total outstanding borrowings [Abstract]
Carrying value	15,000,000
Borrowings by contractual maturity date [Abstract]
Call provision	Callable
Carrying value	15,000,000
Weighted Average Interest Rate (in hundredths)	3.95%
Junior Subordinated Debenture Owed to Unconsolidated Subsidiary Trust [Abstract]
Call Provision	Callable
November 10, 2015 [Member] \| Federal Home Loan Bank Advances [Member]
Total outstanding borrowings [Abstract]
Carrying value	75,000,000
Borrowings by contractual maturity date [Abstract]
Call provision	Callable
Carrying value	75,000,000
Weighted Average Interest Rate (in hundredths)	4.24%
Junior Subordinated Debenture Owed to Unconsolidated Subsidiary Trust [Abstract]
Call Provision	Callable
January 27, 2016 [Member] \| Federal Home Loan Bank Advances [Member]
Total outstanding borrowings [Abstract]
Carrying value	10,000,000
Borrowings by contractual maturity date [Abstract]
Call provision	Callable
Carrying value	10,000,000
Weighted Average Interest Rate (in hundredths)	3.98%
Junior Subordinated Debenture Owed to Unconsolidated Subsidiary Trust [Abstract]
Call Provision	Callable
May 19, 2016 [Member] \| Federal Home Loan Bank Advances [Member]
Total outstanding borrowings [Abstract]
Carrying value	100,000,000
Borrowings by contractual maturity date [Abstract]
Call provision	Callable
Carrying value	100,000,000
Weighted Average Interest Rate (in hundredths)	4.72%
Junior Subordinated Debenture Owed to Unconsolidated Subsidiary Trust [Abstract]
Call Provision	Callable
August 8, 2016 [Member] \| Federal Home Loan Bank Advances [Member]
Total outstanding borrowings [Abstract]
Carrying value	60,000,000
Borrowings by contractual maturity date [Abstract]
Call provision	Callable
Carrying value	60,000,000
Weighted Average Interest Rate (in hundredths)	4.28%
Junior Subordinated Debenture Owed to Unconsolidated Subsidiary Trust [Abstract]
Call Provision	Callable
October 11, 2016 Number 1 [Member] \| Federal Home Loan Bank Advances [Member]
Total outstanding borrowings [Abstract]
Carrying value	25,000,000
Borrowings by contractual maturity date [Abstract]
Call provision	Callable
Carrying value	25,000,000
Weighted Average Interest Rate (in hundredths)	4.62%
Junior Subordinated Debenture Owed to Unconsolidated Subsidiary Trust [Abstract]
Call Provision	Callable
October 11, 2016 Number 2 [Member] \| Federal Home Loan Bank Advances [Member]
Total outstanding borrowings [Abstract]
Carrying value	25,000,000
Borrowings by contractual maturity date [Abstract]
Call provision	Callable
Carrying value	25,000,000
Weighted Average Interest Rate (in hundredths)	4.35%
Junior Subordinated Debenture Owed to Unconsolidated Subsidiary Trust [Abstract]
Call Provision	Callable
July 31, 2017 Number 1 [Member] \| Federal Home Loan Bank Advances [Member]
Total outstanding borrowings [Abstract]
Carrying value	50,000,000
Borrowings by contractual maturity date [Abstract]
Call provision	Callable
Carrying value	50,000,000
Weighted Average Interest Rate (in hundredths)	4.05%
Junior Subordinated Debenture Owed to Unconsolidated Subsidiary Trust [Abstract]
Call Provision	Callable
July 31, 2017 Number 2 [Member] \| Federal Home Loan Bank Advances [Member]
Total outstanding borrowings [Abstract]
Carrying value	50,000,000
Borrowings by contractual maturity date [Abstract]
Call provision	Callable
Carrying value	50,000,000
Weighted Average Interest Rate (in hundredths)	4.04%
Junior Subordinated Debenture Owed to Unconsolidated Subsidiary Trust [Abstract]
Call Provision	Callable
July 31, 2017 Number 3 [Member] \| Federal Home Loan Bank Advances [Member]
Total outstanding borrowings [Abstract]
Carrying value	100,000,000
Borrowings by contractual maturity date [Abstract]
Call provision	Callable
Carrying value	100,000,000
Weighted Average Interest Rate (in hundredths)	4.03%
Junior Subordinated Debenture Owed to Unconsolidated Subsidiary Trust [Abstract]
Call Provision	Callable
December 21, 2017 Number 1 [Member] \| Federal Home Loan Bank Advances [Member]
Total outstanding borrowings [Abstract]
Carrying value	31,600,000
Borrowings by contractual maturity date [Abstract]
Call provision	Callable
Carrying value	31,600,000
Weighted Average Interest Rate (in hundredths)	3.16%
Junior Subordinated Debenture Owed to Unconsolidated Subsidiary Trust [Abstract]
Call Provision	Callable
December 21, 2017 Number 2 [Member] \| Federal Home Loan Bank Advances [Member]
Total outstanding borrowings [Abstract]
Carrying value	126,400,000
Borrowings by contractual maturity date [Abstract]
Call provision	Callable
Carrying value	126,400,000
Weighted Average Interest Rate (in hundredths)	3.40%
Junior Subordinated Debenture Owed to Unconsolidated Subsidiary Trust [Abstract]
Call Provision	Callable
January 25, 2018 [Member] \| Federal Home Loan Bank Advances [Member]
Total outstanding borrowings [Abstract]
Carrying value	10,000,000
Borrowings by contractual maturity date [Abstract]
Call provision	Callable
Carrying value	10,000,000
Weighted Average Interest Rate (in hundredths)	2.73%
Junior Subordinated Debenture Owed to Unconsolidated Subsidiary Trust [Abstract]
Call Provision	Callable
July 31, 2031 [Member] \| Subordinated Debt Held By Unconsolidated Subsidiary Trust [Member]
Total outstanding borrowings [Abstract]
Carrying value	24,728,000
Borrowings by contractual maturity date [Abstract]
Carrying value	24,728,000
Weighted Average Interest Rate (in hundredths)	4.01%
December 15, 2036 [Member] \| Subordinated Debt Held By Unconsolidated Subsidiary Trust [Member]
Total outstanding borrowings [Abstract]
Carrying value	77,320,000
Borrowings by contractual maturity date [Abstract]
Carrying value	$ 77,320,000
Weighted Average Interest Rate (in hundredths)	2.20%

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+ Details

Name:	us-gaap_InterestExpenseTrustPreferredSecurities
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

Name:	us-gaap_JuniorSubordinatedDebentureOwedToUnconsolidatedSubsidiaryTrustAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Reflects the calculation as of the balance sheet date of the average interest rate weighted by the amount of long-term debt outstanding by type or by instrument at that time.

+ References

No definition available.

+ Details

Name:	us-gaap_LongtermDebtWeightedAverageInterestRate
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant