ACCOUNTING POLICIES - New Accounting Standards (Details) - USD ($) |
6 Months Ended | ||
|---|---|---|---|
Jun. 30, 2018 |
May 01, 2018 |
Dec. 31, 2017 |
|
| New Accounting Pronouncements or Change in Accounting Principle [Line Items] | |||
| Cumulative effect of new accounting principle in period of adoption | $ (107,000) | ||
| Accumulated other comprehensive income | (14,045,000) | $ (884,000) | |
| Retained earnings | 415,492,000 | $ 379,468,000 | |
| Accounting Standards Update 2017-12 | |||
| New Accounting Pronouncements or Change in Accounting Principle [Line Items] | |||
| Securities, available-for-sale | 187,400,000 | ||
| Cumulative effect of new accounting principle in period of adoption | $ 400,000 | ||
| Accounting Standards Update 2018-02 | |||
| New Accounting Pronouncements or Change in Accounting Principle [Line Items] | |||
| Accumulated other comprehensive income | (107,000) | ||
| Retained earnings | $ 107,000 | ||
| Accounting Standards Update 2017-12 & 2018-02 | |||
| New Accounting Pronouncements or Change in Accounting Principle [Line Items] | |||
| Retained earnings | $ 293,000 |
| X | ||||||||||
- 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. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Amount after tax of increase (decrease) to equity or (increase) decrease to net assets, resulting from the cumulative effect adjustment of a new accounting principle applied in the period of adoption. No definition available.
|
| X | ||||||||||
- Definition Amount of investment in debt security, measured at amortized cost, transferred to investment in debt security, measured at fair value, with change in fair value recognized in other comprehensive income (available-for-sale) and net income (trading). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
|
| X | ||||||||||
- Definition The cumulative amount of the reporting entity's undistributed earnings or deficit. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|