SECURITIES: (Details Textual)	3 Months Ended	12 Months Ended
	Sep. 30, 2014 USD ($)	Dec. 31, 2015 USD ($) cdo	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)	Sep. 30, 2013 USD ($)	Dec. 31, 2012 USD ($)
Schedule of Available-for-sale Securities [Line Items]
Securities pledged as collateral		$ 406,800,000	$ 412,500,000
Gain on sale of investments		23,000	2,000
Loss on sale of investments		$ 6,000	5,000
Number of investment securities with an amortized cost greater than fair value (investments)		101
Cumulative OTTI charges		$ 13,995,000	14,050,000	$ 14,079,000		$ 14,983,000
Amortized Cost		876,796,000	880,946,000
Securities available-for-sale		891,082,000	897,053,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss		$ 6,719,000	$ 8,189,000
Standard Poors | Minimum
Schedule of Available-for-sale Securities [Line Items]
Credit quality indicator pricing		44.98
Standard Poors | Maximum
Schedule of Available-for-sale Securities [Line Items]
Credit quality indicator pricing		63.92
Moody Investor Service | Minimum
Schedule of Available-for-sale Securities [Line Items]
Credit quality indicator pricing		7.3
Moody Investor Service | Maximum
Schedule of Available-for-sale Securities [Line Items]
Credit quality indicator pricing		16.47
Other Than Temporarily Impaired Cdo [Member]
Schedule of Available-for-sale Securities [Line Items]
Number of CDO's | cdo		3
Contractual balance		$ 25,800,000
Reduced balance		14,900,000
Interest payment received		2,200,000
Cumulative OTTI charges		14,000,000
Other comprehensive income net		$ 5,300,000
Base discount rate, which is subject to an additional margin		3 month LIBOR
Other Than Temporarily Impaired Cdo [Member] | Minimum
Schedule of Available-for-sale Securities [Line Items]
Severity of OTTI (as a percent)		28.00%
Other Than Temporarily Impaired Cdo [Member] | Maximum
Schedule of Available-for-sale Securities [Line Items]
Severity of OTTI (as a percent)		92.00%
Collateralized debt obligations
Schedule of Available-for-sale Securities [Line Items]
Payment received	$ 1,300,000
CDO payment receivable					$ 200,000
London Interbank Offered Rate (LIBOR) [Member] | Other Than Temporarily Impaired Cdo [Member]
Schedule of Available-for-sale Securities [Line Items]
Available For Sale Securities Present Value Of Future Cash Flows Discount Rate, Basis Point Spread on Variable Rate Basis, Minimum		1.60%
Available For Sale Securities Present Value Of Future Cash Flows Discount Rate, Basis Point Spread on Variable Rate Basis, Maximum		1.80%