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Recent Accounting Pronouncements (Impact of ASC 326 in Loan Portfolio Segments as January 1, 2020) (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020	Jan. 01, 2020	Dec. 31, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loans	$ 3,074,523	$ 3,091,998		$ 3,081,973
Impact of ASC 326 Adoption
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loans				0
December 31, 2019 After Reclassification
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loans				3,081,973
Commercial and Industrial Loans
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loans	591,263	638,773	$ 534,692	589,758
Commercial and Industrial Loans | Impact of ASC 326 Adoption
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loans			2,191	(57,257)
Commercial and Industrial Loans | December 31, 2019 After Reclassification
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loans				532,501
Commercial Real Estate Loans
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loans	1,517,172	1,467,397	1,500,247	1,495,862
Commercial Real Estate Loans | Impact of ASC 326 Adoption
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loans			4,385
Commercial Real Estate Loans | December 31, 2019 After Reclassification
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loans				1,495,862
Agricultural Loans
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loans	344,450	376,186	384,654	384,526
Agricultural Loans | Impact of ASC 326 Adoption
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loans			128
Agricultural Loans | December 31, 2019 After Reclassification
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loans				384,526
Leases
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loans	56,655	55,664	57,257
Leases | Impact of ASC 326 Adoption
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loans			0	57,257
Leases | December 31, 2019 After Reclassification
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loans				57,257
Home Equity Loans
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loans	213,296	219,348	225,790	225,755
Home Equity Loans | Impact of ASC 326 Adoption
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loans			35
Home Equity Loans | December 31, 2019 After Reclassification
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loans				225,755
Consumer Loans
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loans	64,058	66,717	69,264	81,217
Consumer Loans | Impact of ASC 326 Adoption
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loans			0	(11,953)
Consumer Loans | December 31, 2019 After Reclassification
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loans				69,264
Credit Cards
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loans	13,536	11,637	11,953
Credit Cards | Impact of ASC 326 Adoption
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loans			0	11,953
Credit Cards | December 31, 2019 After Reclassification
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loans				11,953
Residential Mortgage Loans
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loans	$ 274,093	$ 256,276	305,002	304,855
Residential Mortgage Loans | Impact of ASC 326 Adoption
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loans			$ 147
Residential Mortgage Loans | December 31, 2019 After Reclassification
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loans				$ 304,855

X

- Definition

Amount, before allowance for credit loss, fee, and loan in process, of financing receivable. Excludes financing receivable covered under loss sharing agreement.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
-Paragraph 5
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=124255953&loc=SL82919230-210447

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=124259787&loc=d3e4428-111522

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(7))
-URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878

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+ References

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