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COMPREHENSIVE INCOME - Components of AOCI (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Accumulated Other Comprehensive Income (AOCI)
Beginning balance	$ 239,483
Other comprehensive income (loss) before reclassification	(3,882)	$ 4,270
Amounts reclassified from AOCI	(1,950)	(723)
Total other comprehensive income (loss)	(5,832)	3,547	$ 5,485
Ending balance	274,328	239,483
Unrealized gains (losses) on available for-sale securities
Accumulated Other Comprehensive Income (AOCI)
Beginning balance	7,586	2,942
Other comprehensive income (loss) before reclassification	(4,472)	5,344
Amounts reclassified from AOCI	(2,967)	(700)
Total other comprehensive income (loss)	(7,439)	4,644
Ending balance	147	7,586	2,942
Defined benefit pension plan items
Accumulated Other Comprehensive Income (AOCI)
Beginning balance	(5,047)	(4,295)
Other comprehensive income (loss) before reclassification	590	(1,074)
Amounts reclassified from AOCI	388	322
Total other comprehensive income (loss)	978	(752)
Ending balance	(4,069)	(5,047)	(4,295)
Investment hedge
Accumulated Other Comprehensive Income (AOCI)
Beginning balance	(313)	32
Other comprehensive income (loss) before reclassification	0	0
Amounts reclassified from AOCI	629	(345)
Total other comprehensive income (loss)	629	(345)
Ending balance	316	(313)	32
AOCI attributable to parent
Accumulated Other Comprehensive Income (AOCI)
Beginning balance	2,226	(1,321)
Ending balance	$ (3,606)	$ 2,226	$ (1,321)

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

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Amount after tax of other comprehensive income (loss) attributable to parent entity.

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Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity.

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