LOANS AND ALLOWANCE FOR LOAN LOSSES (Schedule of Loan Aging Analysis by Portfolio Segment) (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015	Jun. 30, 2015
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	$ 29,309	$ 23,212
Current	2,555,991	2,466,994
Total Loans Outstanding	2,585,300	2,490,206	$ 1,807,007
Loans 90 Days Past Due and Accruing	112	0
Non-Accrual Loans	23,713	18,322
Residential Real Estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	5,910	9,973
Current	794,646	810,644
Total Loans Outstanding	800,556	820,617	587,244
Loans 90 Days Past Due and Accruing	0	0
Non-Accrual Loans	4,697	7,253
Commercial Real Estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	15,761	8,230
Current	1,002,016	919,721
Total Loans Outstanding	1,017,777	927,951	660,135
Loans 90 Days Past Due and Accruing	0	0
Non-Accrual Loans	13,752	4,529
Commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	4,130	1,819
Current	332,387	295,902
Total Loans Outstanding	336,517	297,721	262,187
Loans 90 Days Past Due and Accruing	0	0
Non-Accrual Loans	3,539	4,489
Home Equity
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	2,391	2,788
Current	339,590	345,846
Total Loans Outstanding	341,981	348,634	281,057
Loans 90 Days Past Due and Accruing	0	0
Non-Accrual Loans	1,611	1,933
Consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	20	237
Current	17,798	17,716
Total Loans Outstanding	17,818	17,953	16,384
Loans 90 Days Past Due and Accruing	0	0
Non-Accrual Loans	4	118
HPFC Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,097	165
Current	69,554	77,165
Total Loans Outstanding	70,651	77,330	$ 0
Loans 90 Days Past Due and Accruing	112	0
Non-Accrual Loans	110	0
Financing Receivables, 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	8,318	8,731
Financing Receivables, 30 to 59 Days Past Due [Member] | Residential Real Estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,862	3,325
Financing Receivables, 30 to 59 Days Past Due [Member] | Commercial Real Estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,519	4,219
Financing Receivables, 30 to 59 Days Past Due [Member] | Commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	3,296	267
Financing Receivables, 30 to 59 Days Past Due [Member] | Home Equity
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	941	643
Financing Receivables, 30 to 59 Days Past Due [Member] | Consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	13	112
Financing Receivables, 30 to 59 Days Past Due [Member] | HPFC Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	687	165
Financing Receivables, 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	13,399	4,195
Financing Receivables, 60 to 89 Days Past Due [Member] | Residential Real Estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	456	571
Financing Receivables, 60 to 89 Days Past Due [Member] | Commercial Real Estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	12,516	2,427
Financing Receivables, 60 to 89 Days Past Due [Member] | Commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	78	550
Financing Receivables, 60 to 89 Days Past Due [Member] | Home Equity
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	161	640
Financing Receivables, 60 to 89 Days Past Due [Member] | Consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	7
Financing Receivables, 60 to 89 Days Past Due [Member] | HPFC Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	188	0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	7,592	10,286
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Residential Real Estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	3,592	6,077
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Commercial Real Estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,726	1,584
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	756	1,002
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Home Equity
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,289	1,505
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	7	118
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | HPFC Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	$ 222	$ 0