LOAN LOSS ALLOWANCE (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Activity in the allowance for loan losses
Balance at beginning of period				$ 33,323					$ 33,323
Provision for loan losses	3,898	3,685	3,989	3,396	3,100	3,178	2,700	2,400	14,968	11,378	9,590
Balance at end of period	35,662				33,323				35,662	33,323
Allowance For Loan Losses
Total	35,662				33,323				35,662	33,323
Business Activity
Activity in the allowance for loan losses
Balance at beginning of period				29,527				31,891	29,527	31,891	31,898
Charged-off loans									9,470	8,102	9,067
Recoveries on charged-off loans									673	1,329	416
Provision for loan losses									12,065	4,409	8,644
Balance at end of period	32,795				29,527				32,795	29,527	31,891
Allowance For Loan Losses
Individually evaluated for impairment	1,143				1,282				1,143	1,282	3,209
Collectively evaluated	31,652				28,245				31,652	28,245	28,682
Total	32,795				29,527				32,795	29,527	31,891
Acquired Loans
Activity in the allowance for loan losses
Balance at beginning of period				3,796				1,317	3,796	1,317	546
Charged-off loans									4,383	4,735	383
Recoveries on charged-off loans									551	245	208
Provision for loan losses									2,903	6,969	946
Balance at end of period	2,867				3,796				2,867	3,796	1,317
Allowance For Loan Losses
Individually evaluated for impairment	171				757				171	757	55
Collectively evaluated	2,696				3,039				2,696	3,039	1,262
Total	2,867				3,796				2,867	3,796	1,317
Residential | Mortgages | Business Activity
Activity in the allowance for loan losses
Balance at beginning of period				6,937				5,928	6,937	5,928	3,150
Charged-off loans									1,455	1,761	2,604
Recoveries on charged-off loans									186	398	103
Provision for loan losses									1,168	2,372	5,279
Balance at end of period	6,836				6,937				6,836	6,937	5,928
Allowance For Loan Losses
Individually evaluated for impairment	155				905				155	905	287
Collectively evaluated	6,681				6,032				6,681	6,032	5,641
Total	6,836				6,937				6,836	6,937	5,928
Residential | Mortgages | Acquired Loans
Activity in the allowance for loan losses
Balance at beginning of period				625				509	625	509	281
Charged-off loans									1,141	636	43
Recoveries on charged-off loans									179	1
Provision for loan losses									952	751	271
Balance at end of period	615				625				615	625	509
Allowance For Loan Losses
Individually evaluated for impairment	48				230				48	230	55
Collectively evaluated	567				395				567	395	454
Total	615				625				615	625	509
Commercial real estate | Business Activity
Activity in the allowance for loan losses
Balance at beginning of period				13,705				18,863	13,705	18,863	22,095
Charged-off loans									4,207	3,378	4,229
Recoveries on charged-off loans									9	540	52
Provision for loan losses									5,183	(2,320)	945
Balance at end of period	14,690				13,705				14,690	13,705	18,863
Allowance For Loan Losses
Individually evaluated for impairment	922				219				922	219	1,444
Collectively evaluated	13,768				13,486				13,768	13,486	17,419
Total	14,690				13,705				14,690	13,705	18,863
Commercial real estate | Acquired Loans
Activity in the allowance for loan losses
Balance at beginning of period				2,339				390	2,339	390	158
Charged-off loans									1,477	1,748
Recoveries on charged-off loans									261	15
Provision for loan losses									(333)	3,682	232
Balance at end of period	790				2,339				790	2,339	390
Allowance For Loan Losses
Individually evaluated for impairment	48				488				48	488
Collectively evaluated	742				1,851				742	1,851	390
Total	790				2,339				790	2,339	390
Commercial real estate | Business loans | Business Activity
Activity in the allowance for loan losses
Balance at beginning of period				5,173				5,605	5,173	5,605	4,540
Charged-off loans									2,500	2,046	697
Recoveries on charged-off loans									193	121	96
Provision for loan losses									2,340	1,493	1,666
Balance at end of period	5,206				5,173				5,206	5,173	5,605
Allowance For Loan Losses
Individually evaluated for impairment					55					55	1,205
Collectively evaluated	5,206				5,118				5,206	5,118	4,400
Total	5,206				5,173				5,206	5,173	5,605
Commercial real estate | Business loans | Acquired Loans
Activity in the allowance for loan losses
Balance at beginning of period				597				96	597	96	38
Charged-off loans									510	771
Recoveries on charged-off loans									35	84
Provision for loan losses									971	1,188	58
Balance at end of period	1,093				597				1,093	597	96
Allowance For Loan Losses
Collectively evaluated	1,093				597				1,093	597	96
Total	1,093				597				1,093	597	96
Consumer | Business Activity
Activity in the allowance for loan losses
Balance at beginning of period				3,644				1,466	3,644	1,466	2,203
Charged-off loans									1,308	917	1,537
Recoveries on charged-off loans									285	270	165
Provision for loan losses									3,307	2,825	635
Balance at end of period	5,928				3,644				5,928	3,644	1,466
Allowance For Loan Losses
Individually evaluated for impairment	66				103				66	103	273
Collectively evaluated	5,862				3,541				5,862	3,541	1,193
Total	5,928				3,644				5,928	3,644	1,466
Consumer | Acquired Loans
Activity in the allowance for loan losses
Balance at beginning of period				235				314	235	314	87
Charged-off loans									1,255	1,580	340
Recoveries on charged-off loans									76	145	208
Provision for loan losses									1,313	1,356	359
Balance at end of period	369				235				369	235	314
Allowance For Loan Losses
Individually evaluated for impairment	75				39				75	39
Collectively evaluated	294				196				294	196	314
Total	369				235				369	235	314
Unallocated | Business Activity
Activity in the allowance for loan losses
Balance at beginning of period				68				29	68	29	(90)
Provision for loan losses									67	39	119
Balance at end of period	135				68				135	68	29
Allowance For Loan Losses
Collectively evaluated	135				68				135	68	29
Total	135				68				135	68	29
Unallocated | Acquired Loans
Activity in the allowance for loan losses
Balance at beginning of period								8		8	(18)
Provision for loan losses										(8)	26
Balance at end of period											8
Allowance For Loan Losses
Collectively evaluated											8
Total											$ 8