Nature of Operations and Summary of Significant Accounting Policies (Details) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2022 USD ($) Item	Jun. 30, 2022 USD ($)
Financing Receivable, Credit Quality Indicator [Line Items]
Cash and cash equivalents held at the Federal Reserve Bank of Kansas City	$ 174	$ 174
Number of subsidiaries \| Item	3
Farmers & Stockmens Bank [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Payments to Acquire Businesses, Gross		$ 75

The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (b)(1)
-URI http://asc.fasb.org/extlink&oid=120321790&loc=d3e6927-128479

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 13
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3213-108585

Name:	us-gaap_PaymentsToAcquireBusinessesGross
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration