FAIR VALUE MEASUREMENTS (Details) (USD $)	6 Months Ended	12 Months Ended
	Jun. 30, 2013	Dec. 31, 2012	Jun. 30, 2013 Municipal bonds and obligations	Dec. 31, 2012 Municipal bonds and obligations	Jun. 30, 2013 Government guaranteed residential mortgage-backed securities	Dec. 31, 2012 Government guaranteed residential mortgage-backed securities	Jun. 30, 2013 Government-sponsored residential mortgage-backed securities	Dec. 31, 2012 Government-sponsored residential mortgage-backed securities	Jun. 30, 2013 Corporate bonds	Dec. 31, 2012 Corporate bonds	Jun. 30, 2013 Trust preferred securities	Dec. 31, 2012 Trust preferred securities	Jun. 30, 2013 Other bonds and obligations	Dec. 31, 2012 Other bonds and obligations	Jun. 30, 2013 Marketable equity securities	Dec. 31, 2012 Marketable equity securities	Jun. 30, 2013 Level 1 Inputs	Dec. 31, 2012 Level 1 Inputs	Jun. 30, 2013 Level 2 Inputs	Dec. 31, 2012 Level 2 Inputs	Jun. 30, 2013 Level 3 Inputs	Dec. 31, 2012 Level 3 Inputs	Jun. 30, 2013 Recurring basis	Jun. 30, 2012 Recurring basis	Jun. 30, 2013 Recurring basis Level 1 Inputs	Dec. 31, 2012 Recurring basis Level 1 Inputs	Jun. 30, 2013 Recurring basis Level 1 Inputs Marketable equity securities	Dec. 31, 2012 Recurring basis Level 1 Inputs Marketable equity securities	Jun. 30, 2013 Recurring basis Level 2 Inputs	Dec. 31, 2012 Recurring basis Level 2 Inputs	Jun. 30, 2013 Recurring basis Level 2 Inputs Municipal bonds and obligations	Dec. 31, 2012 Recurring basis Level 2 Inputs Municipal bonds and obligations	Jun. 30, 2013 Recurring basis Level 2 Inputs Government guaranteed residential mortgage-backed securities	Dec. 31, 2012 Recurring basis Level 2 Inputs Government guaranteed residential mortgage-backed securities	Jun. 30, 2013 Recurring basis Level 2 Inputs Government-sponsored residential mortgage-backed securities	Dec. 31, 2012 Recurring basis Level 2 Inputs Government-sponsored residential mortgage-backed securities	Jun. 30, 2013 Recurring basis Level 2 Inputs Corporate bonds	Dec. 31, 2012 Recurring basis Level 2 Inputs Corporate bonds	Jun. 30, 2013 Recurring basis Level 2 Inputs Trust preferred securities	Dec. 31, 2012 Recurring basis Level 2 Inputs Trust preferred securities	Jun. 30, 2013 Recurring basis Level 2 Inputs Other bonds and obligations	Dec. 31, 2012 Recurring basis Level 2 Inputs Other bonds and obligations	Jun. 30, 2013 Recurring basis Level 2 Inputs Marketable equity securities	Jun. 30, 2013 Recurring basis Level 3 Inputs	Dec. 31, 2012 Recurring basis Level 3 Inputs	Jun. 30, 2013 Recurring basis Level 3 Inputs Trust preferred securities	Dec. 31, 2012 Recurring basis Level 3 Inputs Trust preferred securities	Jun. 30, 2013 Recurring basis Level 3 Inputs Marketable equity securities	Jun. 30, 2013 Recurring basis Total Fair Value	Dec. 31, 2012 Recurring basis Total Fair Value	Jun. 30, 2013 Recurring basis Total Fair Value Municipal bonds and obligations	Dec. 31, 2012 Recurring basis Total Fair Value Municipal bonds and obligations	Jun. 30, 2013 Recurring basis Total Fair Value Government guaranteed residential mortgage-backed securities	Dec. 31, 2012 Recurring basis Total Fair Value Government guaranteed residential mortgage-backed securities	Jun. 30, 2013 Recurring basis Total Fair Value Government-sponsored residential mortgage-backed securities	Dec. 31, 2012 Recurring basis Total Fair Value Government-sponsored residential mortgage-backed securities	Jun. 30, 2013 Recurring basis Total Fair Value Corporate bonds	Dec. 31, 2012 Recurring basis Total Fair Value Corporate bonds	Jun. 30, 2013 Recurring basis Total Fair Value Trust preferred securities	Dec. 31, 2012 Recurring basis Total Fair Value Trust preferred securities	Jun. 30, 2013 Recurring basis Total Fair Value Other bonds and obligations	Dec. 31, 2012 Recurring basis Total Fair Value Other bonds and obligations	Jun. 30, 2013 Recurring basis Total Fair Value Marketable equity securities	Dec. 31, 2012 Recurring basis Total Fair Value Marketable equity securities
Assets and financial liabilities measured at fair value on a recurring basis
Transfers between levels																							$ 0	$ 0
Trading account security																					15,566,000	16,893,000																						15,566,000	16,893,000				15,566,000	16,893,000
Available-for-sale securities:	568,268,000	466,169,000	83,031,000	84,757,000	38,652,000	43,092,000	354,729,000	278,593,000	39,235,000	10,007,000	16,757,000	20,957,000	3,226,000	3,472,000	32,638,000	25,291,000	31,260,000	25,291,000	535,190,000	439,993,000	1,818,000	885,000					31,260,000	25,291,000			83,031,000	84,757,000	38,652,000	43,091,000	354,729,000	278,593,000	39,235,000	10,007,000	15,750,000	20,072,000	3,226,000	3,472,000	567,000			1,007,000	885,000	811,000			83,031,000	84,757,000	38,652,000	43,091,000	354,729,000	278,593,000	39,235,000	10,007,000	16,757,000	20,957,000	3,226,000	3,472,000	32,638,000	25,291,000
Loans Held for sale																			64,101,000	85,368,000									64,101,000	85,368,000																			64,101,000	85,368,000
Derivative assets	8,063,000	14,746,000															3,510,000		8,651,000	14,746,000	1,403,000	6,258,000			3,510,000				8,651,000	14,746,000														1,403,000	6,258,000				13,564,000	21,004,000
Derivative liabilities	(16,141,000)	(29,814,000)																282,000	14,594,000	29,818,000	1,507,000	1,055,000				282,000			14,594,000	29,818,000														1,507,000	1,055,000				16,101,000	31,155,000
Unrealized losses on forward commitments	$ 1,500,000	$ 1,300,000