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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.

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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.

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Amount after tax, before reclassification adjustments of other comprehensive income (loss).

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Amount after tax and reclassification adjustments of other comprehensive income (loss).

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ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Changes in AOCI) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Jan. 01, 2018
Changes in each component of accumulated other comprehensive income (loss), net of tax
Balance at the beginning of the period	$ (16,093)	$ (1,039)	$ (1,521)
Other comprehensive income (loss) before reclassifications	26,784		(1,305)
Amounts reclassified from AOCI	818		1,787
Total other comprehensive income (loss), net of tax	27,602	(13,079)	482
Balance at the end of the period	8,409	(16,093)	(1,039)
Investment Securities
Changes in each component of accumulated other comprehensive income (loss), net of tax
Balance at the beginning of the period	(9,643)	5,073	4,729
Other comprehensive income (loss) before reclassifications	27,594	(13,918)	(505)
Amounts reclassified from AOCI	(26)	(204)	849
Total other comprehensive income (loss), net of tax	27,568	(14,122)	344
Balance at the end of the period	14,825	(9,643)	5,073
Defined Benefit Plans
Changes in each component of accumulated other comprehensive income (loss), net of tax
Balance at the beginning of the period	(6,450)	(6,112)	(6,250)
Other comprehensive income (loss) before reclassifications	(810)	193	(800)
Amounts reclassified from AOCI	844	850	938
Total other comprehensive income (loss), net of tax	34	1,043	138
Balance at the end of the period	(6,416)	(6,450)	(6,112)
Accumulated Other Comprehensive Income (Loss)
Changes in each component of accumulated other comprehensive income (loss), net of tax
Balance at the beginning of the period	(16,093)	(1,039)
Other comprehensive income (loss) before reclassifications		(13,725)
Amounts reclassified from AOCI		646
Total other comprehensive income (loss), net of tax	27,602	(13,079)	482
Balance at the end of the period		(16,093)	(1,039)
Accounting Standards Update 2016-01
Changes in each component of accumulated other comprehensive income (loss), net of tax
Impact of adoption of new accounting standards				$ 0
Accounting Standards Update 2016-01 \| Investment Securities
Changes in each component of accumulated other comprehensive income (loss), net of tax
Impact of adoption of new accounting standards				(139)
Accounting Standards Update 2016-01 \| Defined Benefit Plans
Changes in each component of accumulated other comprehensive income (loss), net of tax
Impact of adoption of new accounting standards				0
Accounting Standards Update 2016-01 \| Accumulated Other Comprehensive Income (Loss)
Changes in each component of accumulated other comprehensive income (loss), net of tax
Impact of adoption of new accounting standards				(139)
As Adjusted
Changes in each component of accumulated other comprehensive income (loss), net of tax
Balance at the beginning of the period	(19,193)
Balance at the end of the period		(19,193)
As Adjusted \| Investment Securities
Changes in each component of accumulated other comprehensive income (loss), net of tax
Balance at the beginning of the period	(12,743)	4,934
Balance at the end of the period		(12,743)	4,934
As Adjusted \| Defined Benefit Plans
Changes in each component of accumulated other comprehensive income (loss), net of tax
Balance at the beginning of the period	$ (6,450)	(6,112)
Balance at the end of the period		(6,450)	(6,112)
As Adjusted \| Accumulated Other Comprehensive Income (Loss)
Changes in each component of accumulated other comprehensive income (loss), net of tax
Balance at the beginning of the period		$ (1,178)
Balance at the end of the period			$ (1,178)
Accounting Standards Update 2018-02
Changes in each component of accumulated other comprehensive income (loss), net of tax
Impact of adoption of new accounting standards				0
Accounting Standards Update 2018-02 \| Investment Securities
Changes in each component of accumulated other comprehensive income (loss), net of tax
Impact of adoption of new accounting standards				(455)
Accounting Standards Update 2018-02 \| Defined Benefit Plans
Changes in each component of accumulated other comprehensive income (loss), net of tax
Impact of adoption of new accounting standards				(1,381)
Accounting Standards Update 2018-02 \| Accumulated Other Comprehensive Income (Loss)
Changes in each component of accumulated other comprehensive income (loss), net of tax
Impact of adoption of new accounting standards				$ (1,836)