Accumulated Other Comprehensive Income (Tables)	9 Months Ended
Sep. 30, 2021
Accumulated Other Comprehensive Income [Abstract]
Summary Of Accumulated Other Comprehensive Income	(Dollars in thousands)Foreign‎Currency‎Items Unrealized‎Gain (Losses)‎on Available-‎for-Sale‎Investments Accrued‎Pension‎Service Costs Hedge‎Accounting‎Reserve TotalBalance at January 1, 2021$ 14,966 $ (12) $ (2,135) $ (317) $ 12,502 Change related to derivatives Total change in hedge fair value recorded in Other Comprehensive Income — — — (8) (8)Amounts reclassified from accumulated other comprehensive income — — — 181 181Net change related to derivatives — — — 173 173 Net current-period other comprehensive income (loss) (8,494) (1) 156 173 (8,166)Balance at September 30, 2021$ 6,472 $ (13) $ (1,979) $ (144) $ 4,336

Tabular disclosure of the components of accumulated other comprehensive income (loss).

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 830
-SubTopic 30
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6450520&loc=d3e32583-110901

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 14A
-URI http://asc.fasb.org/extlink&oid=124509347&loc=SL7669686-108580

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 830
-SubTopic 30
-Section 45
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=118261656&loc=d3e32211-110900

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