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Premises and Equipment - Additional Information (Details) | 12 Months Ended
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Dec. 31, 2021 USD ($) branch | Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($)
Property Plant And Equipment [Line Items] |  |  |
Depreciation and amortization (including capital lease amortization) included in noninterest expense | $ 21,100,000 | $ 20,200,000 | $ 17,300,000
Number of branches closed | branch | 12 |  |
Premises |  |  |
Property Plant And Equipment [Line Items] |  |  |
Impairment charge | $ 0 | 1,600,000 | 0
Equipment |  |  |
Property Plant And Equipment [Line Items] |  |  |
Impairment charge | $ 0 | $ 1,600,000 | $ 0

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- Definition The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8736-108599 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3602-108585 + Details
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