ALLOWANCE FOR LOAN LOSSES AND CREDIT QUALITY (Balance In The Allowance For Loan Losses And The Recorded Investment In Loans By Portfolio Management) (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014
Ending allowance balance attributable to loans:
Individually evaluated for impairment	$ 3,439		$ 3,659
Collectively evaluated for impairment	39,808		39,951
Total ending allowance balance	43,247	$ 43,284	43,610	$ 44,816	$ 45,677	$ 46,262
Loans:
Loans individually evaluated for impairment	19,266		20,579
Loans collectively evaluated for impairment	3,178,731		3,060,350
Total ending loans balance	3,197,997		3,080,929
Commercial and Industrial Loans [Member]
Ending allowance balance attributable to loans:
Individually evaluated for impairment	2,704		2,781
Collectively evaluated for impairment	18,231		18,783
Total ending allowance balance	20,935	20,465	21,564	22,360	23,024	22,785
Loans:
Loans individually evaluated for impairment	6,051		8,286
Loans collectively evaluated for impairment	1,220,667		1,171,407
Total ending loans balance	1,226,718		1,179,693
Commercial Real Estate and Multi-Family Residential Loans [Member]
Ending allowance balance attributable to loans:
Individually evaluated for impairment	313		465
Collectively evaluated for impairment	12,324		12,008
Total ending allowance balance	12,637	12,752	12,473	13,112	13,804	14,153
Loans:
Loans individually evaluated for impairment	9,197		9,823
Loans collectively evaluated for impairment	1,178,337		1,119,150
Total ending loans balance	1,187,534		1,128,973
Agri Business and Agricultural Loans [Member]
Ending allowance balance attributable to loans:
Individually evaluated for impairment	0		0
Collectively evaluated for impairment	3,047		2,445
Total ending allowance balance	3,047	2,454	2,445	1,881	1,627	1,790
Loans:
Loans individually evaluated for impairment	2,498		471
Loans collectively evaluated for impairment	306,333		305,707
Total ending loans balance	308,831		306,178
Other Commercial [Member]
Ending allowance balance attributable to loans:
Individually evaluated for impairment	4		5
Collectively evaluated for impairment	361		569
Total ending allowance balance	365	559	574	358	398	276
Loans:
Loans individually evaluated for impairment	12		12
Loans collectively evaluated for impairment	82,770		85,059
Total ending loans balance	82,782		85,071
Consumer 1-4 Family Mortgage Loans [Member]
Ending allowance balance attributable to loans:
Individually evaluated for impairment	369		358
Collectively evaluated for impairment	2,565		3,037
Total ending allowance balance	2,934	3,586	3,395	3,473	3,313	3,459
Loans:
Loans individually evaluated for impairment	1,451		1,927
Loans collectively evaluated for impairment	338,293		330,072
Total ending loans balance	339,744		331,999
Other Consumer [Member]
Ending allowance balance attributable to loans:
Individually evaluated for impairment	49		50
Collectively evaluated for impairment	284		269
Total ending allowance balance	333	344	319	392	430	483
Loans:
Loans individually evaluated for impairment	57		60
Loans collectively evaluated for impairment	52,331		48,955
Total ending loans balance	52,388		49,015
Unallocated [Member]
Ending allowance balance attributable to loans:
Individually evaluated for impairment	0		0
Collectively evaluated for impairment	2,996		2,840
Total ending allowance balance	2,996	$ 3,124	2,840	$ 3,240	$ 3,081	$ 3,316
Loans:
Loans individually evaluated for impairment	0		0
Loans collectively evaluated for impairment	0		0
Total ending loans balance	$ 0		$ 0