FAIR VALUE, Balance Sheets Grouping (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013		Sep. 30, 2014
Carrying amounts and estimated fair values of financial instruments [Abstract]
Interest-bearing time deposits in other banks	$ 10,000		$ 10,000
Investment securities held to maturity	12,234		63,942
Investment securities available for sale	400,780		308,589
Bank Owned Life Insurance	38,755		44,791
Percentage of derivative in net sale proceeds (in hundredths)	12.00%
Carrying Amount [Member]
Carrying amounts and estimated fair values of financial instruments [Abstract]
Federal Reserve Bank, Federal Home Loan Bank and other stock	2,863		3,200
Carrying Amount [Member] | Level 1 [Member]
Carrying amounts and estimated fair values of financial instruments [Abstract]
Cash and due from banks	131,352		70,152
Carrying Amount [Member] | Level 2 [Member]
Carrying amounts and estimated fair values of financial instruments [Abstract]
Cash equivalents	1,000		1,000
Interest-bearing time deposits in other banks	10,000		10,000
Investment securities held to maturity	11,666		62,323
Investment securities available for sale	400,780		308,589
Loans held for sale	175		0
Accrued interest and loan fees receivable	5,441		6,227
Non maturity deposits	1,284,982		1,356,343
Time deposits	225,079		224,426
Accrued interest payable	160		149
Carrying Amount [Member] | Level 3 [Member]
Carrying amounts and estimated fair values of financial instruments [Abstract]
Bank Owned Life Insurance	38,755		44,791
Carrying Amount [Member] | Level 2/3 [Member]
Carrying amounts and estimated fair values of financial instruments [Abstract]
Loans, net of allowance	1,051,585	[1]	1,243,261	[1]
Estimated Fair Value [Member]
Carrying amounts and estimated fair values of financial instruments [Abstract]
Federal Reserve Bank, Federal Home Loan Bank and other stock
Estimated Fair Value [Member] | Level 1 [Member]
Carrying amounts and estimated fair values of financial instruments [Abstract]
Cash and due from banks	131,352		70,152
Estimated Fair Value [Member] | Level 2 [Member]
Carrying amounts and estimated fair values of financial instruments [Abstract]
Cash equivalents	1,000		1,000
Interest-bearing time deposits in other banks	10,000		10,020
Investment securities held to maturity	12,234		63,942
Investment securities available for sale	400,780		308,589
Loans held for sale	175		0
Accrued interest and loan fees receivable	5,441		6,227
Non maturity deposits	1,284,982		1,356,343
Time deposits	225,946		224,860
Accrued interest payable	160		149
Estimated Fair Value [Member] | Level 3 [Member]
Carrying amounts and estimated fair values of financial instruments [Abstract]
Bank Owned Life Insurance	38,755		44,791
Estimated Fair Value [Member] | Level 2/3 [Member]
Carrying amounts and estimated fair values of financial instruments [Abstract]
Loans, net of allowance	$ 1,056,279	[1]	$ 1,235,732	[1]

[1] Impaired loans are generally classified within Level 3 of the fair value hierarchy.