FAIR VALUE MEASUREMENT AND DISCLOSURE (Schedule of Carrying Amounts and Estimated Fair Value for Financial Instrument Assets and Liabilities) (Details) - USD ($) $ in Thousands		Mar. 31, 2017	Dec. 31, 2016
Financial assets:
Cash and due from banks		$ 78,095	$ 87,707
Available-for-sale Securities		823,241	779,867
Held-to-maturity securities, at amortized cost		94,474	94,609
Held-to-maturity Securities, Fair Value		94,344	94,596
Loans held for sale		5,679	14,836
Mortgage servicing rights	[1]	1,621	1,701
Interest receivable		9,080	8,654
Customer loan swaps		4,683	1,945
Derivative Asset		219
Financial liabilities:
Deposits		2,934,993	2,826,484
Short-term Debt, Fair Value		487,461	530,435
Long-term Debt, Fair Value		10,840	10,836
Subordinated debentures		41,660	41,660
Interest payable		544	534
Customer loan swaps		4,683	1,945
Residential Real Estate
Financial assets:
Loans receivable, net of allowance	[2]	820,446	800,122
Commercial Real Estate
Financial assets:
Loans receivable, net of allowance	[2]	1,046,933	1,006,249
Commercial
Financial assets:
Loans receivable, net of allowance	[2],[3]	385,272	391,493
Home Equity
Financial assets:
Loans receivable, net of allowance	[2]	318,862	327,292
Consumer
Financial assets:
Loans receivable, net of allowance	[2]	16,113	16,845
Readily Available Market Prices (Level 1)
Financial assets:
Cash and due from banks		78,095	87,707
Available-for-sale Securities		0	0
Held-to-maturity Securities, Fair Value		0	0
Loans held for sale		0	0
Mortgage servicing rights	[1]	0	0
Interest receivable		0	0
Customer loan swaps		0	0
Derivative Asset		0
Financial liabilities:
Deposits		0	0
Short-term Debt, Fair Value		0	0
Long-term Debt, Fair Value		0	0
Subordinated debentures		0	0
Interest payable		0	0
Customer loan swaps		0	0
Readily Available Market Prices (Level 1) | Residential Real Estate
Financial assets:
Loans receivable, net of allowance	[2]	0	0
Readily Available Market Prices (Level 1) | Commercial Real Estate
Financial assets:
Loans receivable, net of allowance	[2]	0	0
Readily Available Market Prices (Level 1) | Commercial
Financial assets:
Loans receivable, net of allowance	[2],[3]	0	0
Readily Available Market Prices (Level 1) | Home Equity
Financial assets:
Loans receivable, net of allowance	[2]	0	0
Readily Available Market Prices (Level 1) | Consumer
Financial assets:
Loans receivable, net of allowance	[2]	0	0
Observable Market Data (Level 2)
Financial assets:
Cash and due from banks		0	0
Available-for-sale Securities		823,241	779,867
Held-to-maturity Securities, Fair Value		94,344	94,596
Loans held for sale		5,679	14,836
Mortgage servicing rights	[1]	0	0
Interest receivable		9,080	8,654
Customer loan swaps		4,683	1,945
Derivative Asset		219
Financial liabilities:
Deposits		2,934,993	2,826,484
Short-term Debt, Fair Value		487,461	530,435
Long-term Debt, Fair Value		10,840	10,836
Subordinated debentures		41,660	41,660
Interest payable		544	534
Customer loan swaps		4,683	1,945
Observable Market Data (Level 2) | Residential Real Estate
Financial assets:
Loans receivable, net of allowance	[2]	0	0
Observable Market Data (Level 2) | Commercial Real Estate
Financial assets:
Loans receivable, net of allowance	[2]	0	0
Observable Market Data (Level 2) | Commercial
Financial assets:
Loans receivable, net of allowance	[2],[3]	0	0
Observable Market Data (Level 2) | Home Equity
Financial assets:
Loans receivable, net of allowance	[2]	0	0
Observable Market Data (Level 2) | Consumer
Financial assets:
Loans receivable, net of allowance	[2]	0	0
Company Determined Fair Value (Level 3)
Financial assets:
Cash and due from banks		0	0
Available-for-sale Securities		0	0
Held-to-maturity Securities, Fair Value		0	0
Loans held for sale		0	0
Mortgage servicing rights	[1]	1,621	1,701
Interest receivable		0	0
Customer loan swaps		0	0
Derivative Asset		0
Financial liabilities:
Deposits		0	0
Short-term Debt, Fair Value		0	0
Long-term Debt, Fair Value		0	0
Subordinated debentures		0	0
Interest payable		0	0
Customer loan swaps		0	0
Company Determined Fair Value (Level 3) | Residential Real Estate
Financial assets:
Loans receivable, net of allowance	[2]	820,446	800,122
Company Determined Fair Value (Level 3) | Commercial Real Estate
Financial assets:
Loans receivable, net of allowance	[2]	1,046,933	1,006,249
Company Determined Fair Value (Level 3) | Commercial
Financial assets:
Loans receivable, net of allowance	[2],[3]	385,272	391,493
Company Determined Fair Value (Level 3) | Home Equity
Financial assets:
Loans receivable, net of allowance	[2]	318,862	327,292
Company Determined Fair Value (Level 3) | Consumer
Financial assets:
Loans receivable, net of allowance	[2]	16,113	16,845
Carrying Amount
Financial assets:
Cash and due from banks		78,095	87,707
Available-for-sale Securities		823,241	779,867
Held-to-maturity securities, at amortized cost		94,474	94,609
Loans held for sale		5,679	14,836
Mortgage servicing rights	[1]	1,092	1,210
Interest receivable		9,080	8,654
Customer loan swaps		4,683	1,945
Derivative Asset		219
Financial liabilities:
Deposits		2,937,183	2,828,529
Short-term Debt, Fair Value		487,355	530,129
Long-term Debt, Fair Value		10,773	10,791
Subordinated debentures		58,794	58,755
Interest payable		544	534
Customer loan swaps		4,683	1,945
Carrying Amount | Residential Real Estate
Financial assets:
Loans receivable, net of allowance	[2]	819,639	798,334
Carrying Amount | Commercial Real Estate
Financial assets:
Loans receivable, net of allowance	[2]	1,096,475	1,038,626
Carrying Amount | Commercial
Financial assets:
Loans receivable, net of allowance	[2],[3]	389,530	389,624
Carrying Amount | Home Equity
Financial assets:
Loans receivable, net of allowance	[2]	322,826	327,713
Carrying Amount | Consumer
Financial assets:
Loans receivable, net of allowance	[2]	16,669	17,151
Interest Rate Lock Commitments [Member]
Financial assets:
Customer loan swaps			202
Financial liabilities:
Customer loan swaps			15
Interest Rate Lock Commitments [Member] | Readily Available Market Prices (Level 1)
Financial assets:
Customer loan swaps			0
Financial liabilities:
Customer loan swaps			0
Interest Rate Lock Commitments [Member] | Observable Market Data (Level 2)
Financial assets:
Customer loan swaps			202
Financial liabilities:
Customer loan swaps			15
Interest Rate Lock Commitments [Member] | Company Determined Fair Value (Level 3)
Financial assets:
Customer loan swaps			0
Financial liabilities:
Customer loan swaps			0
Interest Rate Lock Commitments [Member] | Carrying Amount
Financial assets:
Customer loan swaps			202
Financial liabilities:
Customer loan swaps			15
Forward Contracts [Member]
Financial assets:
Customer loan swaps		160	587
Financial liabilities:
Customer loan swaps		44	309
Forward Contracts [Member] | Readily Available Market Prices (Level 1)
Financial assets:
Customer loan swaps		0	0
Financial liabilities:
Customer loan swaps		0	0
Forward Contracts [Member] | Observable Market Data (Level 2)
Financial assets:
Customer loan swaps		160	587
Financial liabilities:
Customer loan swaps		44	309
Forward Contracts [Member] | Company Determined Fair Value (Level 3)
Financial assets:
Customer loan swaps		0	0
Financial liabilities:
Customer loan swaps		0	0
Forward Contracts [Member] | Carrying Amount
Financial assets:
Customer loan swaps		160	587
Financial liabilities:
Customer loan swaps		44	309
Interest rate swaps
Financial liabilities:
Junior subordinated debt interest rate swaps		7,958	8,372
Interest rate swaps | Readily Available Market Prices (Level 1)
Financial liabilities:
Junior subordinated debt interest rate swaps		0	0
Interest rate swaps | Observable Market Data (Level 2)
Financial liabilities:
Junior subordinated debt interest rate swaps		7,958	8,372
Interest rate swaps | Company Determined Fair Value (Level 3)
Financial liabilities:
Junior subordinated debt interest rate swaps		0	0
Interest rate swaps | Carrying Amount
Financial liabilities:
Junior subordinated debt interest rate swaps		7,958	8,372
Forward-Starting Interest Rate Swap
Financial liabilities:
Junior subordinated debt interest rate swaps		208	389
Forward-Starting Interest Rate Swap | Readily Available Market Prices (Level 1)
Financial liabilities:
Junior subordinated debt interest rate swaps		0	0
Forward-Starting Interest Rate Swap | Observable Market Data (Level 2)
Financial liabilities:
Junior subordinated debt interest rate swaps		208	389
Forward-Starting Interest Rate Swap | Company Determined Fair Value (Level 3)
Financial liabilities:
Junior subordinated debt interest rate swaps		0	0
Forward-Starting Interest Rate Swap | Carrying Amount
Financial liabilities:
Junior subordinated debt interest rate swaps		$ 208	$ 389

[1] (3) Reported fair value represents all MSRs currently being serviced by the Company.

[2] (1)The presented carrying amount is net of the allocated ALL.

[3] (2) Includes the HPFC loan portfolio.