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FAIR VALUE MEASUREMENTS - Unobservable Inputs Non-recurring (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2018 | Dec. 31, 2017
Quantitative information about the significant unobservable inputs within Level 3 |  |
Other real estate owned | $ 216 | $ 122
Non-recurring | Level 3 |  |
Quantitative information about the significant unobservable inputs within Level 3 |  |
Total | 20,038 | 15,073
Non-recurring | Fair value of collateral -appraised value | Level 3 |  |
Quantitative information about the significant unobservable inputs within Level 3 |  |
Impaired loans | 13,364 | 8,586
Other real estate owned | 216 | 122
Non-recurring | Discount cash flow | Level 3 |  |
Quantitative information about the significant unobservable inputs within Level 3 |  |
Impaired loans | 1,763 | 2,207
Capitalized servicing rights | 4,695 | 4,158
Non-recurring | Impaired loans | Level 3 |  |
Quantitative information about the significant unobservable inputs within Level 3 |  |
Impaired loans | $ 15,127 | $ 10,793
Non-recurring | Impaired loans | Minimum | Fair value of collateral -appraised value | Level 3 |  |
Quantitative information about the significant unobservable inputs within Level 3 |  |
Loss severity | 0.00% | 15.70%
Appraised value | $ 100 | $ 100
Non-recurring | Impaired loans | Minimum | Discount cash flow | Level 3 |  |
Quantitative information about the significant unobservable inputs within Level 3 |  |
Discount rate | 2.88% | 2.63%
Cash flows | $ 26 | $ 6
Non-recurring | Impaired loans | Maximum | Fair value of collateral -appraised value | Level 3 |  |
Quantitative information about the significant unobservable inputs within Level 3 |  |
Loss severity | 54.00% | 45.28%
Appraised value | $ 6,915 | $ 7,545
Non-recurring | Impaired loans | Maximum | Discount cash flow | Level 3 |  |
Quantitative information about the significant unobservable inputs within Level 3 |  |
Discount rate | 9.50% | 9.50%
Cash flows | $ 570 | $ 320
Non-recurring | Capitalized servicing rights | Level 3 |  |
Quantitative information about the significant unobservable inputs within Level 3 |  |
Capitalized servicing rights | $ 4,695 | $ 4,158
Non-recurring | Capitalized servicing rights | Discount cash flow | Level 3 |  |
Quantitative information about the significant unobservable inputs within Level 3 |  |
Discount rate | 10.10% | 10.10%
Constant prepayment rate (CPR) | 9.22% | 10.97%
Non-recurring | Other real estate owned | Level 3 |  |
Quantitative information about the significant unobservable inputs within Level 3 |  |
Other real estate owned | $ 216 | $ 122
Non-recurring | Other real estate owned | Fair value of collateral -appraised value | Level 3 |  |
Quantitative information about the significant unobservable inputs within Level 3 |  |
Appraised value | $ 216 | $ 122

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- Definition Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 + Details
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- Definition Interest rate used to find the present value of an amount to be paid or received in the future as an input to measure fair value. For example, but not limited to, weighted average cost of capital (WACC), cost of capital, cost of equity and cost of debt. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 + Details
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- Definition Carrying amount as of the balance sheet date of land and buildings obtained through foreclosure proceedings or defeasance in full or partial satisfaction of a debt arrangement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 10 -Section S99 -Paragraph 6 -Subparagraph (SX 210.5-04(c)(Schedule III)) -URI http://asc.fasb.org/extlink&oid=27047687&loc=d3e5864-122674 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5162-111524 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=82891408&loc=d3e4437-111522 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 970 -SubTopic 360 -Section S99 -Paragraph 1 -Subparagraph (SX 210.12-28) -URI http://asc.fasb.org/extlink&oid=6590653&loc=d3e638233-123024 + Details
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- Definition Fair value of an asset representing net future revenue from contractually specified servicing fees, late charges, and other ancillary revenues, in excess of future costs related to servicing arrangements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 50 -Section 50 -Paragraph 3 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=68078379&loc=d3e122625-111746 + Details
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