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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Detail) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2016 USD ($) segment component office | Mar. 31, 2015 USD ($) | Dec. 31, 2015 USD ($) investment
Accounting Policies [Abstract] |  |  |
Number of offices in which the company operates throughout the country | office | 21 |  |
Accounting Policies [Line Items] |  |  |
Impairment charge related to investment | $ 0 |  |
Held to maturity or trading securities | $ 0 |  | $ 0
Number of impairment components | component | 2 |  |
Debt securities other than temporarily impaired | $ 0 |  | 0
Maturity of interest bearing deposits | 90 days |  |
Evaluation period to return past due loans to accrual status | 6 months |  |
Balance of loans serviced for others | $ 324,221,000 |  | 317,793,000
Foreclosed real estate totaled | $ 495,000 |  | $ 710,000
Percentage of limited partner interest | 99.00% |  |
Number of investments accounted for under the proportional amortization method | investment |  |  | 1
Investment in real estate partnership | $ 5,328,000 |  | $ 5,450,000
Investment in real estate partnerships, proportional amortization method | 2,150,000 |  | 2,205,000
Loss investment in real estate partnership | 89,000 | $ 85,000 |
Losses on investments accounted for under the proportional amortization method | 33,000 |  |
Recognition of federal tax credits | 184,000 | 119,000 |
Advertising expense | 151,000 | $ 112,000 |
Accumulated other comprehensive income (loss), net of taxes | $ 4,434,000 |  | 1,199,000
Number of significant operating segment | segment | 1 |  |
Other Assets |  |  |
Accounting Policies [Line Items] |  |  |
Mortgage servicing rights | $ 2,710,000 |  | $ 2,672,000
Deposit Premium |  |  |
Accounting Policies [Line Items] |  |  |
Finite lives of intangible assets | 10 years |  |
Customer Lists |  |  |
Accounting Policies [Line Items] |  |  |
Finite lives of intangible assets | 15 years |  |
Minimum | Building and Improvements |  |  |
Accounting Policies [Line Items] |  |  |
Plant and equipment, useful life | 10 years |  |
Minimum | Furniture and Equipment |  |  |
Accounting Policies [Line Items] |  |  |
Plant and equipment, useful life | 3 years |  |
Maximum |  |  |
Accounting Policies [Line Items] |  |  |
Cash and cash equivalents, original maturities | 90 days |  |
Maximum | Building and Improvements |  |  |
Accounting Policies [Line Items] |  |  |
Plant and equipment, useful life | 40 years |  |
Maximum | Furniture and Equipment |  |  |
Accounting Policies [Line Items] |  |  |
Plant and equipment, useful life | 15 years |  |

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- Definition Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=66004124&loc=d3e637-108580 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14 -URI http://asc.fasb.org/extlink&oid=66004124&loc=d3e681-108580 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=66004124&loc=SL7669686-108580 + Details
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