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	Sep. 30, 2015	Jun. 30, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Dec. 31, 2013
Ending allowance balance attributable to loans:
Individually evaluated for impairment	$ 4,304		$ 5,421
Collectively evaluated for impairment	40,390		40,841
Total ending allowance balance	44,694	$ 44,816	46,262	$ 46,387	$ 45,605	$ 48,797
Loans:
Loans individually evaluated for impairment	22,666		31,964
Loans collectively evaluated for impairment	2,949,614		2,730,356
Total ending loans balance	2,972,280		2,762,320
Commercial and Industrial Loans [Member]
Ending allowance balance attributable to loans:
Individually evaluated for impairment	3,129		3,306
Collectively evaluated for impairment	19,184		19,479
Total ending allowance balance	22,313	22,360	22,785	21,985	20,922	21,005
Loans:
Loans individually evaluated for impairment	9,140		14,702
Loans collectively evaluated for impairment	1,162,373		1,020,897
Total ending loans balance	1,171,513		1,035,599
Commercial Real Estate and Multi-Family Residential Loans [Member]
Ending allowance balance attributable to loans:
Individually evaluated for impairment	783		1,531
Collectively evaluated for impairment	12,108		12,622
Total ending allowance balance	12,891	13,112	14,153	15,370	15,975	18,557
Loans:
Loans individually evaluated for impairment	10,530		13,005
Loans collectively evaluated for impairment	1,085,215		1,011,858
Total ending loans balance	1,095,745		1,024,863
Agri Business and Agricultural Loans [Member]
Ending allowance balance attributable to loans:
Individually evaluated for impairment	0		14
Collectively evaluated for impairment	1,989		1,776
Total ending allowance balance	1,989	1,881	1,790	1,375	1,404	1,682
Loans:
Loans individually evaluated for impairment	472		486
Loans collectively evaluated for impairment	248,678		273,388
Total ending loans balance	249,150		273,874
Other Commercial [Member]
Ending allowance balance attributable to loans:
Individually evaluated for impairment	0		15
Collectively evaluated for impairment	369		261
Total ending allowance balance	369	358	276	310	234	391
Loans:
Loans individually evaluated for impairment	0		30
Loans collectively evaluated for impairment	82,971		75,684
Total ending loans balance	82,971		75,714
Consumer 1-4 Family Mortgage Loans [Member]
Ending allowance balance attributable to loans:
Individually evaluated for impairment	333		482
Collectively evaluated for impairment	3,023		2,977
Total ending allowance balance	3,356	3,473	3,459	3,453	3,275	3,045
Loans:
Loans individually evaluated for impairment	2,434		3,614
Loans collectively evaluated for impairment	321,393		299,189
Total ending loans balance	323,827		302,803
Other Consumer [Member]
Ending allowance balance attributable to loans:
Individually evaluated for impairment	59		73
Collectively evaluated for impairment	269		410
Total ending allowance balance	328	392	483	519	487	608
Loans:
Loans individually evaluated for impairment	90		127
Loans collectively evaluated for impairment	48,984		49,340
Total ending loans balance	49,074		49,467
Unallocated [Member]
Ending allowance balance attributable to loans:
Individually evaluated for impairment	0		0
Collectively evaluated for impairment	3,448		3,316
Total ending allowance balance	3,448	$ 3,240	3,316	$ 3,375	$ 3,308	$ 3,509
Loans:
Loans individually evaluated for impairment	0		0
Loans collectively evaluated for impairment	0		0
Total ending loans balance	$ 0		$ 0