BORROWINGS, Trusts (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013
Borrowings [Line Items]
Repurchase Agreements Maturities Summary Total	$ 50,000
Payments for Repurchase of Trust Preferred Securities	66,100
Subordinated Debentures - NPB Capital Trust III [Member]
Statutory Business Trusts [Abstract]
Junior subordinated debenture, principal	20,600
Junior subordinated debenture, issuance date	Feb. 20, 2004
Junior subordinated debenture, maturity date	Apr. 23, 2034
Junior subordinated debenture, variable interest rate basis	Three Month LIBOR
Junior subordinated debenture, basis spread on rate (in hundredths)	2.75%
Junior subordinated debenture, callable period after issuance (in years)	5 years
Subordinated Debentures - NPB Capital Trust IV [Member]
Statutory Business Trusts [Abstract]
Junior subordinated debenture, principal	20,600
Junior subordinated debenture, issuance date	Mar. 25, 2004
Junior subordinated debenture, maturity date	Apr. 07, 2034
Junior subordinated debenture, variable interest rate basis	Three Month LIBOR
Junior subordinated debenture, basis spread on rate (in hundredths)	2.75%
Junior subordinated debenture, callable period after issuance (in years)	5 years
Subordinated Debentures - NPB Capital Trust V [Member]
Statutory Business Trusts [Abstract]
Junior subordinated debenture, principal	20,600
Junior subordinated debenture, issuance date	Apr. 07, 2004
Junior subordinated debenture, maturity date	Apr. 07, 2034
Junior subordinated debenture, variable interest rate basis	Three Month LIBOR
Junior subordinated debenture, basis spread on rate (in hundredths)	2.75%
Junior subordinated debenture, callable period after issuance (in years)	5 years
Subordinated Debentures - NPB Capital Trust VI [Member]
Statutory Business Trusts [Abstract]
Junior subordinated debenture, principal	$ 15,400
Junior subordinated debenture, issuance date	Jan. 19, 2006
Junior subordinated debenture, maturity date	Mar. 15, 2036
Junior subordinated debenture, variable interest rate basis	Three Month LIBOR
Junior subordinated debenture, basis spread on rate (in hundredths)	1.38%
Junior subordinated debenture, callable period after issuance (in years)	5 years