Acquisitions and Dispositions - Disposals, Narrative (Details) - Discontinued Operations, Disposed of by Sale - First Bank Insurance Services $ in Millions	Jun. 30, 2021 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Consideration for the sale	$ 13.0
Future earn-out payment	1.0
Cash received at the time of sale	11.3
Net assets sold and liabilities transferred	1.7
Gain on sale	1.7
Total intangible assets	10.2
Goodwill	7.4
Finite-lived intangible assets	$ 2.8