SUBORDINATED DEBENTURES (Details) (USD $) In Thousands, unless otherwise specified			6 Months Ended
	Jun. 30, 2012	Dec. 31, 2011	Jun. 30, 2012 First Bank Statutory Trust Two [Member]	Jun. 30, 2012 Royal Oaks Capital Trust One [Member]	Jun. 30, 2012 First Bank Statutory Trust Three [Member]	Jun. 30, 2012 First Bank Statutory Trust Four [Member]	Jun. 30, 2012 First Bank Statutory Trust Five [Member]	Jun. 30, 2012 First Bank Statutory Trust Six [Member]	Jun. 30, 2012 First Bank Statutory Trust Seven [Member]	Jun. 30, 2012 First Bank Statutory Trust Eight [Member]	Jun. 30, 2012 First Bank Statutory Trust Ten [Member]	Jun. 30, 2012 First Bank Statutory Trust Nine [Member]	Jun. 30, 2012 First Bank Statutory Trust Eleven [Member]	Jun. 30, 2012 First Bank Statutory Trust [Member]	Jun. 30, 2012 First Preferred Capital Trust Four [Member]
Issuance Date			Sep. 01, 2004	Oct. 01, 2004	Nov. 01, 2004	Mar. 01, 2006	Apr. 01, 2006	Jun. 01, 2006	Dec. 01, 2006	Feb. 01, 2007	Aug. 01, 2007	Sep. 01, 2007	Sep. 01, 2007	Mar. 01, 2003	Apr. 01, 2003
Maturity Date			Sep. 20, 2034	Jan. 07, 2035	Dec. 15, 2034	Mar. 15, 2036	Jun. 15, 2036	Jul. 07, 2036	Dec. 15, 2036	Mar. 30, 2037	Sep. 15, 2037	Dec. 15, 2037	Dec. 15, 2037	Mar. 20, 2033	Jun. 30, 2033
Call Date			Sep. 20, 2009	Jan. 07, 2010	Dec. 15, 2009	Mar. 15, 2011	Jun. 15, 2011	Jul. 07, 2011	Dec. 15, 2011	Mar. 30, 2012	Sep. 15, 2012	Dec. 15, 2012	Dec. 15, 2012	Mar. 20, 2008	Jun. 30, 2008
Interest Rate			+205.0 bp	+240.0 bp	+218.0 bp	+142.0 bp	+145.0 bp	+165.0 bp	+185.0 bp	+161.0 bp	+230.0 bp	+225.0 bp	+285.0 bp	8.10%	8.15%
Trust Preferred Securities			$ 20,000	$ 4,000	$ 40,000	$ 40,000	$ 20,000	$ 25,000	$ 50,000	$ 25,000	$ 15,000	$ 25,000	$ 10,000	$ 25,000	$ 46,000
Subordinated debentures	$ 354,095	$ 354,057	$ 20,619	$ 4,124	$ 41,238	$ 41,238	$ 20,619	$ 25,774	$ 51,547	$ 25,774	$ 15,464	$ 25,774	$ 10,310	$ 25,774	$ 47,423