LOANS (Schedule of Loan Balances by Portfolio Class) (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2015	Dec. 31, 2014
Total loans	$ 2,739,447	$ 2,247,257
Net deferred fees	2,491	3,010
Total loans including net deferred costs	$ 2,741,938	$ 2,250,267
Total loans (in percent)	100.00%	100.00%
Commercial and Industrial Sector [Member]
Total loans	$ 128,475	$ 81,362
Total loans (in percent)	4.69%	3.62%
Agricultural Sector [Member]
Total loans	$ 183	$ 364
Total loans (in percent)	0.01%	0.02%
Residential Portfolio Segment [Member] | Junior Lien [Member]
Total loans	$ 11,049	$ 11,808
Total loans (in percent)	0.40%	0.52%
Consumer and Other [Member]
Total loans	$ 32,058	$ 27,084
Total loans (in percent)	1.17%	1.20%
Unallocated Financing Receivables [Member]
Total loans including net deferred costs	$ 2,947	$ 1,838
Primary Residential Mortgages [Member] | Residential Portfolio Segment [Member]
Total loans	$ 482,765	$ 480,149
Total loans (in percent)	17.62%	21.37%
Home Equity Lines of Credit [Member] | Residential Portfolio Segment [Member]
Total loans	$ 51,832	$ 50,302
Total loans including net deferred costs	$ 51,675	$ 50,141
Total loans (in percent)	1.89%	2.24%
Multifamily Property [Member] | Commercial Real Estate Portfolio Segment [Member]
Total loans	$ 1,371,139	$ 1,080,256
Total loans including net deferred costs	$ 1,371,139	$ 1,080,256
Total loans (in percent)	50.05%	48.07%
Owner Occupied Property [Member] | Commercial Real Estate Portfolio Segment [Member]
Total loans	$ 126,926	$ 105,446
Total loans (in percent)	4.63%	4.69%
Investment Property [Member] | Commercial Real Estate Portfolio Segment [Member]
Total loans	$ 534,870	$ 405,771
Total loans (in percent)	19.53%	18.06%
Construction Loans [Member]
Total loans including net deferred costs	$ 1,417	$ 5,998
Construction Loans [Member] | Commercial Portfolio Segment [Member]
Total loans	$ 150	$ 4,715
Total loans (in percent)	0.01%	0.21%