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Comprehensive Income - Components of AOCI (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Accumulated Other Comprehensive Income (AOCI)
Beginning balance			$ 274,328
Other comprehensive income (loss) before reclassification	$ (12,198)	$ 2,827	(25,330)	$ (716)
Amounts reclassified from accumulated other comprehensive income (loss)	(60)	(936)	(484)	(1,511)
Net current period other comprehensive income (loss)	(12,258)	1,891	(25,814)	(2,227)
Ending balance	252,300		252,300
Unrealized gains (losses) on available for-sale securities
Accumulated Other Comprehensive Income (AOCI)
Beginning balance	(13,766)	1,863	147	7,586
Other comprehensive income (loss) before reclassification	(12,437)	2,581	(25,852)	(2,267)
Amounts reclassified from accumulated other comprehensive income (loss)	0	(1,308)	(498)	(2,183)
Net current period other comprehensive income (loss)	(12,437)	1,273	(26,350)	(4,450)
Ending balance	(26,203)	3,136	(26,203)	3,136
Defined benefit pension plan items
Accumulated Other Comprehensive Income (AOCI)
Beginning balance	(3,704)	(3,644)	(4,069)	(5,047)
Other comprehensive income (loss) before reclassification	239	246	522	1,551
Amounts reclassified from accumulated other comprehensive income (loss)	80	97	162	195
Net current period other comprehensive income (loss)	319	343	684	1,746
Ending balance	(3,385)	(3,301)	(3,385)	(3,301)
Investment hedge
Accumulated Other Comprehensive Income (AOCI)
Beginning balance	308	(111)	316	(313)
Other comprehensive income (loss) before reclassification	0	0	0	0
Amounts reclassified from accumulated other comprehensive income (loss)	(140)	275	(148)	477
Net current period other comprehensive income (loss)	(140)	275	(148)	477
Ending balance	168	164	168	164
Accumulated other comprehensive income (loss)
Accumulated Other Comprehensive Income (AOCI)
Beginning balance	(17,162)	(1,892)	(3,606)	2,226
Ending balance	$ (29,420)	$ (1)	$ (29,420)	$ (1)

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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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