LOANS (Details 2) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Past due loans
Total loans	$ 4,728,663	$ 4,680,600
Business Activity
Past due loans
30-59 Days Past Due	6,737	9,320
60-89 Days Past Due	1,823	4,980
Greater Than 90 Days Past Due	18,372	17,172
Total Past Due	26,932	31,472
Current	3,986,737	3,887,408
Total loans	4,013,669	3,918,880
Past Due > 90 days and Accruing	3,736	2,394
Acquired Loans
Past due loans
30-59 Days Past Due	3,514	2,958
60-89 Days Past Due	1,004	2,424
Greater Than 90 Days Past Due	10,038	8,185
Total Past Due	14,556	13,567
Current	12,663	13,809
Acquired Credit Impaired	12,700	13,800
Total loans	714,994	761,720
Past Due > 90 days and Accruing	2,665	1,258
Residential | Mortgages
Past due loans
Total loans	1,473,239	1,496,204
Residential | Mortgages | Business Activity
Past due loans
30-59 Days Past Due	1,888	6,246
60-89 Days Past Due	888	556
Greater Than 90 Days Past Due	4,480	4,053
Total Past Due	7,256	10,855
Current	1,208,558	1,215,597
Total loans	1,215,814	1,226,452
Past Due > 90 days and Accruing	2,113	1,527
Residential | Mortgages | Acquired Loans
Past due loans
30-59 Days Past Due	187	1,133
60-89 Days Past Due	592	638
Greater Than 90 Days Past Due	1,930	1,651
Total Past Due	2,709	3,422
Acquired Credit Impaired	361	375
Total loans	257,425	269,752
Past Due > 90 days and Accruing	144	269
Residential | Mortgages | 1-4 family
Past due loans
Total loans	1,444,521	1,468,142
Residential | Mortgages | 1-4 family | Business Activity
Past due loans
30-59 Days Past Due	1,888	5,580
60-89 Days Past Due	888	146
Greater Than 90 Days Past Due	4,066	4,053
Total Past Due	6,842	9,779
Current	1,181,176	1,189,629
Total loans	1,188,018	1,199,408
Past Due > 90 days and Accruing	1,699	1,527
Residential | Mortgages | 1-4 family | Acquired Loans
Past due loans
30-59 Days Past Due	187	1,133
60-89 Days Past Due	592	638
Greater Than 90 Days Past Due	1,930	1,651
Total Past Due	2,709	3,422
Acquired Credit Impaired	361	375
Total loans	256,503	268,734
Past Due > 90 days and Accruing	144	269
Residential | Mortgages | Construction
Past due loans
Total loans	28,718	28,062
Residential | Mortgages | Construction | Business Activity
Past due loans
30-59 Days Past Due		666
60-89 Days Past Due		410
Greater Than 90 Days Past Due	414
Total Past Due	414	1,076
Current	27,382	25,968
Total loans	27,796	27,044
Past Due > 90 days and Accruing	414
Residential | Mortgages | Construction | Acquired Loans
Past due loans
Total loans	922	1,018
Commercial real estate
Past due loans
Total loans	1,672,099	1,611,567
Commercial real estate | Business Activity
Past due loans
30-59 Days Past Due	2,145	870
60-89 Days Past Due	577	2,861
Greater Than 90 Days Past Due	10,366	10,561
Total Past Due	13,088	14,292
Current	1,398,902	1,325,784
Total loans	1,411,990	1,340,076
Past Due > 90 days and Accruing	266	621
Commercial real estate | Acquired Loans
Past due loans
30-59 Days Past Due	1,439	277
60-89 Days Past Due	161	715
Greater Than 90 Days Past Due	5,673	3,267
Total Past Due	7,273	4,259
Acquired Credit Impaired	11,427	12,277
Total loans	260,109	271,491
Past Due > 90 days and Accruing	2,257	329
Commercial real estate | Other commercial and industrial loans
Past due loans
Total loans	1,294,527	1,244,959
Commercial real estate | Other commercial and industrial loans | Business Activity
Past due loans
Total loans	1,086,893	1,030,837
Commercial real estate | Other commercial and industrial loans | Acquired Loans
Past due loans
Total loans	207,634	214,122
Commercial real estate | Construction
Past due loans
Total loans	186,846	173,390
Commercial real estate | Construction | Business Activity
Past due loans
60-89 Days Past Due		2,000
Greater Than 90 Days Past Due	758	720
Total Past Due	758	2,720
Current	182,042	166,469
Total loans	182,800	169,189
Commercial real estate | Construction | Acquired Loans
Past due loans
Greater Than 90 Days Past Due	676	691
Total Past Due	676	691
Acquired Credit Impaired	1,281	1,296
Total loans	4,046	4,201
Commercial real estate | Single and multi-family
Past due loans
Total loans	190,726	193,218
Commercial real estate | Single and multi-family | Business Activity
Past due loans
30-59 Days Past Due	245	178
60-89 Days Past Due	247	156
Greater Than 90 Days Past Due	406	458
Total Past Due	898	792
Current	141,399	139,258
Total loans	142,297	140,050
Commercial real estate | Single and multi-family | Acquired Loans
Past due loans
30-59 Days Past Due	323	277
60-89 Days Past Due	45
Greater Than 90 Days Past Due	2,728	572
Total Past Due	3,096	849
Acquired Credit Impaired	4,924	5,477
Total loans	48,429	53,168
Past Due > 90 days and Accruing	2,257
Commercial real estate | Other commercial real estate | Business Activity
Past due loans
30-59 Days Past Due	1,900	692
60-89 Days Past Due	330	705
Greater Than 90 Days Past Due	9,202	9,383
Total Past Due	11,432	10,780
Current	1,075,461	1,020,057
Total loans	1,086,893	1,030,837
Past Due > 90 days and Accruing	266	621
Commercial real estate | Other commercial real estate | Acquired Loans
Past due loans
30-59 Days Past Due	1,116
60-89 Days Past Due	116	715
Greater Than 90 Days Past Due	2,269	2,004
Total Past Due	3,501	2,719
Acquired Credit Impaired	5,222	5,504
Total loans	207,634	214,122
Past Due > 90 days and Accruing		329
Commercial real estate | Business loans
Past due loans
Total loans	826,815	804,366
Commercial real estate | Business loans | Business Activity
Past due loans
30-59 Days Past Due	1,371	1,040
60-89 Days Past Due	150	498
Greater Than 90 Days Past Due	725	856
Total Past Due	2,246	2,394
Current	776,425	750,797
Total loans	778,671	753,191
Past Due > 90 days and Accruing		6
Commercial real estate | Business loans | Acquired Loans
Past due loans
30-59 Days Past Due	285	202
60-89 Days Past Due		32
Greater Than 90 Days Past Due	586	855
Total Past Due	871	1,089
Acquired Credit Impaired	705	986
Total loans	48,144	51,175
Past Due > 90 days and Accruing	3
Commercial real estate | Business loans | Asset based lending
Past due loans
Total loans	354,106	341,246
Commercial real estate | Business loans | Asset based lending | Business Activity
Past due loans
Current	354,106	341,246
Total loans	354,106	341,246
Commercial real estate | Business loans | Other commercial and industrial loans
Past due loans
Total loans	472,709	463,120
Commercial real estate | Business loans | Other commercial and industrial loans | Business Activity
Past due loans
30-59 Days Past Due	1,371	1,040
60-89 Days Past Due	150	498
Greater Than 90 Days Past Due	725	856
Total Past Due	2,246	2,394
Current	422,319	409,551
Total loans	424,565	411,945
Past Due > 90 days and Accruing		6
Commercial real estate | Business loans | Other commercial and industrial loans | Acquired Loans
Past due loans
30-59 Days Past Due	285	202
60-89 Days Past Due		32
Greater Than 90 Days Past Due	586	855
Total Past Due	871	1,089
Acquired Credit Impaired	705	986
Total loans	48,144	51,175
Past Due > 90 days and Accruing	3
Commercial
Past due loans
Total loans	2,498,914	2,415,933
Commercial | Business Activity
Past due loans
Total loans	2,190,661	2,093,267
Commercial | Acquired Loans
Past due loans
Total loans	308,253	322,666
Consumer
Past due loans
Total loans	756,510	768,463
Consumer | Business Activity
Past due loans
30-59 Days Past Due	1,333	1,164
60-89 Days Past Due	208	1,065
Greater Than 90 Days Past Due	2,801	1,702
Total Past Due	4,342	3,931
Current	602,852	595,230
Total loans	607,194	599,161
Past Due > 90 days and Accruing	1,357	240
Consumer | Acquired Loans
Past due loans
30-59 Days Past Due	1,603	1,346
60-89 Days Past Due	251	1,039
Greater Than 90 Days Past Due	1,849	2,412
Total Past Due	3,703	4,797
Acquired Credit Impaired	170	171
Total loans	149,316	169,302
Past Due > 90 days and Accruing	261	660
Consumer | Home equity
Past due loans
Total loans	317,615	318,632
Consumer | Home equity | Business Activity
Past due loans
30-59 Days Past Due	589	333
60-89 Days Past Due	154	1,000
Greater Than 90 Days Past Due	2,546	1,387
Total Past Due	3,289	2,720
Current	252,079	249,961
Total loans	255,368	252,681
Past Due > 90 days and Accruing	1,354	230
Consumer | Home equity | Acquired Loans
Past due loans
30-59 Days Past Due	209	176
60-89 Days Past Due	228	95
Greater Than 90 Days Past Due	1,118	1,049
Total Past Due	1,555	1,320
Acquired Credit Impaired	170	171
Total loans	62,247	65,951
Past Due > 90 days and Accruing	242	466
Consumer | Auto and other
Past due loans
Total loans	438,895	449,831
Consumer | Auto and other | Business Activity
Past due loans
30-59 Days Past Due	744	831
60-89 Days Past Due	54	65
Greater Than 90 Days Past Due	255	315
Total Past Due	1,053	1,211
Current	350,773	345,269
Total loans	351,826	346,480
Past Due > 90 days and Accruing	3	10
Consumer | Auto and other | Acquired Loans
Past due loans
30-59 Days Past Due	1,394	1,170
60-89 Days Past Due	23	944
Greater Than 90 Days Past Due	731	1,363
Total Past Due	2,148	3,477
Total loans	87,069	103,351
Past Due > 90 days and Accruing	$ 19	$ 194