BORROWINGS (Details) (USD $)	12 Months Ended		1 Months Ended	6 Months Ended
	Dec. 31, 2014 Subsidiary	Dec. 31, 2013	Dec. 31, 2013	Jun. 30, 2013
Total outstanding borrowings [Abstract]
Carrying value	$ 440,122,000	$ 244,010,000	$ 244,010,000
Subordinated debt held by unconsolidated subsidiary trust, discount	405,000	430,000	430,000
Weighted-average interest rate on borrowings (in hundredths)	0.89%	2.70%
Borrowings by contractual maturity date [Abstract]
Carrying value	440,122,000	244,010,000	244,010,000
Weighted Average Interest Rate (in hundredths)	0.79%
Number of wholly owned, unconsolidated subsidiary trusts	2
Percent ownership of unconsolidated subsidiary trusts (in hundredths)	100.00%
Federal Home Loan Bank Overnight Advance [Member]
Total outstanding borrowings [Abstract]
Carrying value	338,000,000	141,900,000	141,900,000
Borrowings by contractual maturity date [Abstract]
Carrying value	338,000,000	141,900,000	141,900,000
Federal Home Loan Bank Term Advances [Member]
Total outstanding borrowings [Abstract]
Debt retirement			226,400,000	501,600,000
Early extinguishments costs			23,800,000	63,500,000
Community Statutory Trust III [Member]
Junior Subordinated Debenture Owed to Unconsolidated Subsidiary Trust [Abstract]
Issuance Date	Jul. 31, 2001
Par Amount	24,500,000
Variable Interest Rate Basis	3 month LIBOR
Variable Interest Rate, Basis Spread (in hundredths)	3.58%
Effective Interest Rate (in hundredths)	3.81%
Maturity Date	Jul. 31, 2031
Call Price	Par
Community Capital Trust IV [Member]
Junior Subordinated Debenture Owed to Unconsolidated Subsidiary Trust [Abstract]
Issuance Date	Dec. 08, 2006
Par 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)	1.89%
Maturity Date	Dec. 15, 2036
Call Price	Par
Capital Lease Obligations [Member]
Total outstanding borrowings [Abstract]
Carrying value	0	13,000	13,000
Borrowings by contractual maturity date [Abstract]
Carrying value	0	13,000	13,000
Subordinated Debt Held By Unconsolidated Subsidiary Trust [Member]
Total outstanding borrowings [Abstract]
Carrying value	102,122,000	102,097,000	102,097,000
Borrowings by contractual maturity date [Abstract]
Carrying value	102,122,000	102,097,000	102,097,000
January 2, 2015 [Member] | Federal Home Loan Bank Overnight Advance [Member]
Total outstanding borrowings [Abstract]
Carrying value	338,000,000
Borrowings by contractual maturity date [Abstract]
Carrying value	338,000,000
Weighted Average Interest Rate (in hundredths)	0.32%
July 31, 2031 [Member] | Subordinated Debt Held By Unconsolidated Subsidiary Trust [Member]
Total outstanding borrowings [Abstract]
Carrying value	24,802,000
Borrowings by contractual maturity date [Abstract]
Carrying value	24,802,000
Weighted Average Interest Rate (in hundredths)	3.81%
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)	1.89%