SUBORDINATED DEBENTURES (Summary Of Junior Subordinated Debentures Issued To Trusts) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013	Dec. 31, 2012
Debt Instrument [Line Items]
Subordinated Debentures	$ 354,286		$ 354,210	$ 354,133
First Bank Statutory Trust II
Debt Instrument [Line Items]
Issuance Date	Sep. 01, 2004
Maturity Date	Sep. 20, 2034
Call Date	Sep. 20, 2009	[1]
Trust Preferred Securities	20,000
Subordinated Debentures	20,619
Royal Oaks Capital Trust I
Debt Instrument [Line Items]
Issuance Date	Oct. 01, 2004
Maturity Date	Jan. 07, 2035
Call Date	Jan. 07, 2010	[1]
Trust Preferred Securities	4,000
Subordinated Debentures	4,124
First Bank Statutory Trust III
Debt Instrument [Line Items]
Issuance Date	Nov. 01, 2004
Maturity Date	Dec. 15, 2034
Call Date	Dec. 15, 2009	[1]
Trust Preferred Securities	40,000
Subordinated Debentures	41,238
First Bank Statutory Trust IV
Debt Instrument [Line Items]
Issuance Date	Mar. 01, 2006
Maturity Date	Mar. 15, 2036
Call Date	Mar. 15, 2011	[1]
Trust Preferred Securities	40,000
Subordinated Debentures	41,238
First Bank Statutory Trust V
Debt Instrument [Line Items]
Issuance Date	Apr. 01, 2006
Maturity Date	Jun. 15, 2036
Call Date	Jun. 15, 2011	[1]
Trust Preferred Securities	20,000
Subordinated Debentures	20,619
First Bank Statutory Trust VI
Debt Instrument [Line Items]
Issuance Date	Jun. 01, 2006
Maturity Date	Jul. 07, 2036
Call Date	Jul. 07, 2011	[1]
Trust Preferred Securities	25,000
Subordinated Debentures	25,774
First Bank Statutory Trust VII
Debt Instrument [Line Items]
Issuance Date	Dec. 01, 2006
Maturity Date	Dec. 15, 2036
Call Date	Dec. 15, 2011	[1]
Trust Preferred Securities	50,000
Subordinated Debentures	51,547
First Bank Statutory Trust VIII
Debt Instrument [Line Items]
Issuance Date	Feb. 01, 2007
Maturity Date	Mar. 30, 2037
Call Date	Mar. 30, 2012	[1]
Trust Preferred Securities	25,000
Subordinated Debentures	25,774
First Bank Statutory Trust X
Debt Instrument [Line Items]
Issuance Date	Aug. 01, 2007
Maturity Date	Sep. 15, 2037
Call Date	Sep. 15, 2012	[1]
Trust Preferred Securities	15,000
Subordinated Debentures	15,464
First Bank Statutory Trust IX
Debt Instrument [Line Items]
Issuance Date	Sep. 01, 2007
Maturity Date	Dec. 15, 2037
Call Date	Dec. 15, 2012	[1]
Trust Preferred Securities	25,000
Subordinated Debentures	25,774
First Bank Statutory Trust XI
Debt Instrument [Line Items]
Issuance Date	Sep. 01, 2007
Maturity Date	Dec. 15, 2037
Call Date	Dec. 15, 2012	[1]
Trust Preferred Securities	10,000
Subordinated Debentures	10,310
First Bank Statutory Trust
Debt Instrument [Line Items]
Issuance Date	Mar. 01, 2003
Maturity Date	Mar. 20, 2033
Call Date	Mar. 20, 2008	[1]
Debt Instrument, Interest Rate, Stated Percentage	8.10%	[2]
Trust Preferred Securities	25,000
Subordinated Debentures	25,774
First Preferred Capital Trust IV
Debt Instrument [Line Items]
Issuance Date	Apr. 01, 2003
Maturity Date	Jun. 30, 2033
Call Date	Jun. 30, 2008	[1]
Debt Instrument, Interest Rate, Stated Percentage	8.15%	[2]
Trust Preferred Securities	46,000
Subordinated Debentures	$ 47,423
London Interbank Offered Rate (LIBOR) [Member] | First Bank Statutory Trust II
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	2.05%	[2]
London Interbank Offered Rate (LIBOR) [Member] | Royal Oaks Capital Trust I
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	2.40%	[2]
London Interbank Offered Rate (LIBOR) [Member] | First Bank Statutory Trust III
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	2.18%	[2]
London Interbank Offered Rate (LIBOR) [Member] | First Bank Statutory Trust IV
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	1.42%	[2]
London Interbank Offered Rate (LIBOR) [Member] | First Bank Statutory Trust V
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	1.45%	[2]
London Interbank Offered Rate (LIBOR) [Member] | First Bank Statutory Trust VI
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	1.65%	[2]
London Interbank Offered Rate (LIBOR) [Member] | First Bank Statutory Trust VII
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	1.85%	[2]
London Interbank Offered Rate (LIBOR) [Member] | First Bank Statutory Trust VIII
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	1.61%	[2]
London Interbank Offered Rate (LIBOR) [Member] | First Bank Statutory Trust X
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	2.30%	[2]
London Interbank Offered Rate (LIBOR) [Member] | First Bank Statutory Trust IX
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	2.25%	[2]
London Interbank Offered Rate (LIBOR) [Member] | First Bank Statutory Trust XI
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	2.85%	[2]

[1] The junior subordinated debentures are callable at the option of the Company on the call date shown at 100% of the principal amount plus accrued and unpaid interest.

[2] The interest rates paid on the trust preferred securities are based on either a variable rate or a fixed rate. The variable rate is based on the three-month LIBOR plus the basis point spread shown.