LOANS (Schedule of Balances by Portfolio Class, Based on Impairment Method) (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Total Loans Individually Evaluated for Impairment	$ 23,107	$ 20,451
Ending ALLL Attributable to Loans Individually Evaluated for Impairment	490	957
Total Loans Collectively Evaluated for Impairment	2,888,445	2,226,806
Ending ALLL Attributable to Loans Collectively Evaluated for Impairment	25,366	18,523
Total Loans	2,911,552	2,247,257
Total Ending ALLL	$ 25,856	$ 19,480	$ 15,373	$ 12,735
Agricultural Sector [Member]
Total Loans Individually Evaluated for Impairment
Ending ALLL Attributable to Loans Individually Evaluated for Impairment
Total Loans Collectively Evaluated for Impairment	$ 179	$ 364
Ending ALLL Attributable to Loans Collectively Evaluated for Impairment	2	4
Total Loans	179	364
Total Ending ALLL	2	4	3	3
Residential Portfolio Segment [Member] \| Junior Lien [Member]
Total Loans Individually Evaluated for Impairment	$ 176	$ 164
Ending ALLL Attributable to Loans Individually Evaluated for Impairment
Total Loans Collectively Evaluated for Impairment	$ 11,327	$ 11,644
Ending ALLL Attributable to Loans Collectively Evaluated for Impairment	66	109
Total Loans	11,503	11,808
Total Ending ALLL	66	109	156	314
Commercial Portfolio Segment [Member] \| Commercial and Industrial Sector [Member]
Total Loans Individually Evaluated for Impairment	171	248
Ending ALLL Attributable to Loans Individually Evaluated for Impairment	138	149
Total Loans Collectively Evaluated for Impairment	154,124	81,114
Ending ALLL Attributable to Loans Collectively Evaluated for Impairment	2,071	731
Total Loans	154,295	81,362
Total Ending ALLL	$ 2,209	880	825	803
Consumer and Other [Member]
Total Loans Individually Evaluated for Impairment		2
Ending ALLL Attributable to Loans Individually Evaluated for Impairment		2
Total Loans Collectively Evaluated for Impairment	$ 47,635	27,082
Ending ALLL Attributable to Loans Collectively Evaluated for Impairment	112	94
Total Loans	47,635	27,084
Total Ending ALLL	112	96	78	92
Primary Residential Mortgages [Member] \| Residential Portfolio Segment [Member]
Total Loans Individually Evaluated for Impairment	9,752	6,500
Ending ALLL Attributable to Loans Individually Evaluated for Impairment	291	317
Total Loans Collectively Evaluated for Impairment	473,333	473,649
Ending ALLL Attributable to Loans Collectively Evaluated for Impairment	2,006	2,606
Total Loans	483,085	480,149
Total Ending ALLL	2,297	2,923	2,361	3,047
Home Equity Lines of Credit [Member] \| Residential Portfolio Segment [Member]
Total Loans Individually Evaluated for Impairment	$ 254	$ 210
Ending ALLL Attributable to Loans Individually Evaluated for Impairment
Total Loans Collectively Evaluated for Impairment	$ 52,550	$ 50,092
Ending ALLL Attributable to Loans Collectively Evaluated for Impairment	86	156
Total Loans	52,804	50,302
Total Ending ALLL	$ 86	$ 156	181	267
Multifamily Property [Member] \| Residential Portfolio Segment [Member]
Total Loans Individually Evaluated for Impairment
Ending ALLL Attributable to Loans Individually Evaluated for Impairment
Total Loans Collectively Evaluated for Impairment	$ 1,416,775	$ 1,080,256
Ending ALLL Attributable to Loans Collectively Evaluated for Impairment	11,813	8,983
Total Loans	1,416,775	1,080,256
Total Ending ALLL	11,813	8,983	4,003	1,305
Owner Occupied Property [Member] \| Commercial Real Estate Portfolio Segment [Member]
Total Loans Individually Evaluated for Impairment	$ 1,272	$ 1,674
Ending ALLL Attributable to Loans Individually Evaluated for Impairment
Total Loans Collectively Evaluated for Impairment	$ 175,004	$ 103,772
Ending ALLL Attributable to Loans Collectively Evaluated for Impairment	1,679	1,547
Total Loans	176,276	105,446
Total Ending ALLL	1,679	1,547	2,563	2,509
Investment Property [Member] \| Commercial Real Estate Portfolio Segment [Member]
Total Loans Individually Evaluated for Impairment	11,482	11,653
Ending ALLL Attributable to Loans Individually Evaluated for Impairment	61	489
Total Loans Collectively Evaluated for Impairment	557,367	394,118
Ending ALLL Attributable to Loans Collectively Evaluated for Impairment	7,529	4,262
Total Loans	568,849	405,771
Total Ending ALLL	$ 7,590	$ 4,751	5,083	4,155
Construction Loans [Member] \| Commercial Portfolio Segment [Member]
Total Loans Individually Evaluated for Impairment
Ending ALLL Attributable to Loans Individually Evaluated for Impairment
Total Loans Collectively Evaluated for Impairment	$ 151	$ 4,715
Ending ALLL Attributable to Loans Collectively Evaluated for Impairment	2	31
Total Loans	151	4,715
Total Ending ALLL	$ 2	$ 31	$ 120	$ 240

The valuation allowance for financing receivables that are expected to be uncollectible that were collectively evaluated for impairment.

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Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
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-Paragraph 11B
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-Publisher SEC
-Name Staff Accounting Bulletin (SAB)
-Number Topic 6
-Section L
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Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements.

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