LOANS AND ALLOWANCE FOR LOAN LOSSES (Composition of Loan Portfolio) (Details) - USD ($) $ in Thousands		Jun. 30, 2016	Dec. 31, 2015	Jun. 30, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]
Deferred loan fees, net		$ (309)	$ (370)
Loans		2,585,300	2,490,206	$ 1,807,007
Residential Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	[1]	801,965	821,074
Loans		800,556	820,617	587,244
Commercial Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	[1]	1,018,643	927,951
Loans		1,017,777	927,951	660,135
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	[1]	336,114	297,721
Loans		336,517	297,721	262,187
Home Equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	[1]	340,623	348,634
Loans		341,981	348,634	281,057
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	[1]	17,732	17,953
Loans		17,818	17,953	16,384
HPFC Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	[1]	70,532	77,243
Loans		$ 70,651	$ 77,330	$ 0

[1] (1)The loan balances are presented net of the unamortized fair value mark discount associated with the purchase accounting for acquired loans of $10.4 million and $13.1 million at June 30, 2016 and December 31, 2015, respectively.