Authoritative Accounting Guidance (Narrative) (Details) - USD ($)	Sep. 30, 2021	Dec. 31, 2020
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated loans	$ 103,211,000	$ 80,550,000
Collectively evaluated loans	6,469,284,000	$ 5,192,274,000
Financial Asset Acquired with Credit Deterioration [Member] \| Maximum [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated loans	250,000
Financial Asset Acquired with Credit Deterioration [Member] \| Minimum [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Collectively evaluated loans	$ 250,000

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

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- Definition

The balance of financing receivables that were collectively evaluated for impairment.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (h)
-URI http://asc.fasb.org/extlink&oid=123577603&loc=SL6953423-111524

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- Definition

The balance of financing receivables that were individually evaluated for impairment.

+ References

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