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Recent Accounting Pronouncements (Impact of ASC 326 in Balance Sheet as January 1, 2020) (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Jun. 30, 2020	Mar. 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
Allowance for Credit Losses	(39,995)	$ (45,099)	(46,859)	$ (42,431)	$ (36,641)	$ (31,931)	(16,278)
Allowance for Credit Losses on Unfunded Loan Commitments						(173)
December 31, 2019 After Reclassification
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loans							3,081,973
Allowance for Credit Losses							(16,278)
Allowance for Credit Losses on Unfunded Loan Commitments							0
Impact of ASC 326 Adoption
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loans							0
Allowance for Credit Losses						(15,653)
Allowance for Credit Losses on Unfunded Loan Commitments						(173)
Commercial and Industrial Loans
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loans	591,263		638,773			534,692	589,758
Allowance for Credit Losses	(6,080)	(6,248)	(6,445)	(8,787)	(8,814)		(4,799)
Commercial and Industrial Loans | December 31, 2019 After Reclassification
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loans							532,501
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 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
Allowance for Credit Losses	(24,220)	(28,540)	(29,878)	(22,369)	(17,310)		(4,692)
Commercial Real Estate Loans | December 31, 2019 After Reclassification
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loans							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
Agricultural Loans
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loans	344,450		376,186			384,654	384,526
Allowance for Credit Losses	(5,847)	(6,462)	(6,756)	(7,030)	(6,485)		(5,315)
Agricultural Loans | December 31, 2019 After Reclassification
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loans							384,526
Agricultural Loans | Impact of ASC 326 Adoption
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loans						128
Leases
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loans	56,655		55,664			57,257
Allowance for Credit Losses	(204)	(201)	(200)	(202)	(172)		0
Leases | December 31, 2019 After Reclassification
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loans							57,257
Leases | Impact of ASC 326 Adoption
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loans						0	57,257
Home Equity Loans
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loans	213,296		219,348			225,790	225,755
Allowance for Credit Losses	(908)	(965)	(996)	(1,062)	(977)		(200)
Home Equity Loans | December 31, 2019 After Reclassification
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loans							225,755
Home Equity Loans | Impact of ASC 326 Adoption
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loans						35
Consumer Loans
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loans	64,058		66,717			69,264	81,217
Allowance for Credit Losses	(460)	(439)	(490)	(496)	(455)		(434)
Consumer Loans | December 31, 2019 After Reclassification
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loans							69,264
Consumer Loans | Impact of ASC 326 Adoption
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loans						0	(11,953)
Credit Cards
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loans	13,536		11,637			11,953
Allowance for Credit Losses	(181)	(162)	(150)	(125)	(124)		0
Credit Cards | December 31, 2019 After Reclassification
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loans							11,953
Credit Cards | Impact of ASC 326 Adoption
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loans						0	11,953
Residential Mortgage Loans
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loans	274,093		256,276			305,002	304,855
Allowance for Credit Losses	$ (2,095)	$ (2,082)	$ (1,944)	$ (2,360)	$ (2,304)		(333)
Residential Mortgage Loans | December 31, 2019 After Reclassification
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loans							$ 304,855
Residential Mortgage Loans | Impact of ASC 326 Adoption
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loans						$ 147

X

- Definition

Amount excluding accrued interest, of allowance for credit loss on financing receivable.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=124255206&loc=SL82895884-210446

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- 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
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-SubTopic 210
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+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 460
-SubTopic 10
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=121611286&loc=d3e11927-110247

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