LOANS - IMPAIRED LOANS AND EFFECT ON INTEREST INCOME (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Impaired Loans
Number of days past due to be considered as nonperforming loans			90 days
Accretion				$ (954)
Recorded investment
Total		$ 15,295		15,295
Average investment
Total	$ 10,244		$ 9,512	15,529	$ 18,869
Related Valuation Reserve	454	2,129	454	2,129	251
Interest Income Recognized During Impairment
Total	0	76	542	704	795
Interest Income on Accrual Basis
Total	33	140	611	971	1,125
Nonaccrual Basis
Recorded investment
Total	4,637	8,028	4,637	8,028	2,507
Accrual Basis
Recorded investment
Total	6,691	6,745	6,691	6,745	8,217
Commercial real estate
Average investment
With no valuation reserve	4,011	4,740	4,273	5,344	7,205
With a valuation reserve	1,226	929	702	686
Total	5,237	5,669	4,975	6,030	7,205
Related Valuation Reserve	170	118	170	118
Interest Income Recognized During Impairment
With no valuation reserve		41	295	574	576
Total		41	295	574	576
Interest Income on Accrual Basis
With no valuation reserve	29	45	330	611	655
With a valuation reserve		6		26
Total	29	51	330	637	655
Commercial real estate | Nonaccrual Basis
Recorded investment
With no valuation reserve	593	692	593	692	471
With a valuation reserve	1,528	929	1,528	929
Total	2,121	1,621	2,121	1,621	471
Commercial real estate | Accrual Basis
Recorded investment
With no valuation reserve	3,272	3,978	3,272	3,978	4,051
Total	3,272	3,978	3,272	3,978	4,051
Commercial, financial, and agricultural
Average investment
With no valuation reserve	109	219	208	357	4,849
With a valuation reserve		4,747		3,935	699
Total	109	4,966	208	4,292	5,548
Related Valuation Reserve	231	1,927	231	1,927	192
Interest Income Recognized During Impairment
With no valuation reserve		2	6	21	78
Total		2	6	21	78
Interest Income on Accrual Basis
With no valuation reserve		2	10	23	214
With a valuation reserve		50		140	36
Total		52	10	163	250
Commercial, financial, and agricultural | Nonaccrual Basis
Recorded investment
With a valuation reserve	328	4,706	328	4,706	460
Total	328	4,706	328	4,706	460
Commercial, financial, and agricultural | Accrual Basis
Recorded investment
With no valuation reserve		179		179	1,778
Total		179		179	1,778
Commercial construction
Average investment
With no valuation reserve				103	260
Total				103	260
Interest Income Recognized During Impairment
With no valuation reserve				3	3
Total				3	3
Interest Income on Accrual Basis
With no valuation reserve		0		7	6
With a valuation reserve				0
Total				7	6
One to four family residential real estate
Average investment
With no valuation reserve	4,697	3,968	4,141	4,401	5,413
With a valuation reserve	94	576	91	546	232
Total	4,791	4,544	4,232	4,947	5,645
Related Valuation Reserve		84		84	58
Interest Income Recognized During Impairment
With no valuation reserve		33	237	105	137
Total		33	237	105	137
Interest Income on Accrual Basis
With no valuation reserve	4	37	266	150	205
With a valuation reserve		0		12	6
Total	4	37	266	162	211
One to four family residential real estate | Nonaccrual Basis
Recorded investment
With no valuation reserve	2,107	1,017	2,107	1,017	1,267
With a valuation reserve		597		597	229
Total	2,107	1,614	2,107	1,614	1,496
One to four family residential real estate | Accrual Basis
Recorded investment
With no valuation reserve	3,360	2,584	3,360	2,584	2,385
Total	3,360	2,584	3,360	2,584	2,385
Consumer construction
Average investment
With no valuation reserve	18	76	19	117	99
Total	18	76	19	117	99
Interest Income Recognized During Impairment
With no valuation reserve			4
Total			4
Interest Income on Accrual Basis
With no valuation reserve			4	1	1
Total			4	1	1
Consumer construction | Nonaccrual Basis
Recorded investment
With no valuation reserve	18	21	18	21	20
Total	18	21	18	21	20
Consumer construction | Accrual Basis
Recorded investment
With no valuation reserve	59	2	59	2	2
Total	59	2	59	2	2
Consumer
Average investment
With no valuation reserve	84	20	72	20	102
With a valuation reserve	5	20	6	20	10
Total	89	40	78	40	112
Related Valuation Reserve	53		53		1
Interest Income Recognized During Impairment
With no valuation reserve				1	1
With a valuation reserve					0
Total				1	1
Interest Income on Accrual Basis
With no valuation reserve			1	1	2
With a valuation reserve					0
Total			1	1	2
Consumer | Nonaccrual Basis
Recorded investment
With no valuation reserve	9	5	9	5	50
With a valuation reserve	54	61	54	61	10
Total	63	66	63	66	60
Consumer | Accrual Basis
Recorded investment
With no valuation reserve		2		2	1
With a valuation reserve					0
Total		$ 2		$ 2	$ 1
Peninsula Financial Corporation
Impaired Loans
Accretion			(525)
Accretable yield	(2,844)		(2,844)
Eagle
Impaired Loans
Accretion			(49)
Accretable yield	(2,091)		(2,091)
Niagara Bancorporation
Impaired Loans
Accretion			(299)
Accretable yield	$ (688)		$ (688)