LOANS AND ALLOWANCE FOR LOAN LOSSES (Activity in Allowance for Loan Losses by Portfolio Segment) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		12 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Activity in ALL:
Beginning balance	$ 21,590	$ 23,044	$ 23,044
Loans charged off	(649)	(587)	(4,274)
Recoveries	237	228	768
Provision (reduction)	(492)	(684)	(2,052)
Ending balance	21,670	23,369	21,590
Ending Balance: Individually evaluated for impairment	3,257	3,541	2,981
Ending Balance: Collectively evaluated for impairment	18,413	19,828	18,609
Ending Balance: Individually evaluated for impairment	27,209	27,059	27,947
Ending Balance: Collectively evaluated for impairment	1,592,977	1,551,108	1,552,455
Loans ending balance	1,620,186	1,578,167	1,580,402
Residential real estate loans
Activity in ALL:
Beginning balance	5,603	6,996	6,996
Loans charged off	(183)	(145)	(1,059)
Recoveries	92	3	35
Provision (reduction)	101	(415)	369
Ending balance	5,411	7,269	5,603
Ending Balance: Individually evaluated for impairment	1,628	2,468	1,750
Ending Balance: Collectively evaluated for impairment	3,783	4,801	3,853
Ending Balance: Individually evaluated for impairment	13,041	13,754	14,435
Ending Balance: Collectively evaluated for impairment	554,702	558,180	555,384
Loans ending balance	567,743	571,934	569,819
Commercial real estate loans
Activity in ALL:
Beginning balance	4,374	4,549	4,549
Loans charged off	(171)	(80)	(952)
Recoveries	39	75	121
Provision (reduction)	(286)	942	(656)
Ending balance	4,528	3,602	4,374
Ending Balance: Individually evaluated for impairment	557	197	526
Ending Balance: Collectively evaluated for impairment	3,971	3,405	3,848
Ending Balance: Individually evaluated for impairment	9,339	7,633	8,864
Ending Balance: Collectively evaluated for impairment	565,356	498,359	532,235
Loans ending balance	574,695	505,992	541,099
Commercial loans
Activity in ALL:
Beginning balance	6,220	5,933	5,933
Loans charged off	(219)	(277)	(1,426)
Recoveries	96	129	495
Provision (reduction)	(195)	(415)	(1,218)
Ending balance	6,292	6,200	6,220
Ending Balance: Individually evaluated for impairment	177	325	132
Ending Balance: Collectively evaluated for impairment	6,115	5,875	6,088
Ending Balance: Individually evaluated for impairment	2,372	3,329	2,635
Ending Balance: Collectively evaluated for impairment	188,699	187,963	176,568
Loans ending balance	191,071	191,292	179,203
Home equity loans
Activity in ALL:
Beginning balance	2,403	2,520	2,520
Loans charged off	(62)	(28)	(647)
Recoveries	3	2	56
Provision (reduction)	(329)	(864)	(474)
Ending balance	2,673	3,358	2,403
Ending Balance: Individually evaluated for impairment	754	469	433
Ending Balance: Collectively evaluated for impairment	1,919	2,889	1,970
Ending Balance: Individually evaluated for impairment	2,011	1,855	1,571
Ending Balance: Collectively evaluated for impairment	267,900	289,835	271,059
Loans ending balance	269,911	291,690	272,630
Consumer loans
Activity in ALL:
Beginning balance	319	184	184
Loans charged off	(14)	(57)	(190)
Recoveries	7	19	61
Provision (reduction)	2	(76)	(264)
Ending balance	310	222	319
Ending Balance: Individually evaluated for impairment	141	82	140
Ending Balance: Collectively evaluated for impairment	169	140	179
Ending Balance: Individually evaluated for impairment	446	488	442
Ending Balance: Collectively evaluated for impairment	16,320	16,771	17,209
Loans ending balance	16,766	17,259	17,651
Unallocated
Activity in ALL:
Beginning balance	2,671	2,862	2,862
Provision (reduction)	215	144	191
Ending balance	2,456	2,718	2,671
Ending Balance: Collectively evaluated for impairment	2,456	2,718	2,671
Loans ending balance