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Premises and Equipment | 12 Months Ended
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Dec. 31, 2021
Property, Plant and Equipment [Abstract] |
Premises and Equipment | PREMISES AND EQUIPMENT Major classifications of premises and equipment at December 31, 2021 and 2020 are summarized as follows:
(Dollars in thousands) | Useful Life ( years) |  | 2021 |  | 2020
Land | indefinite |  | $ | 334,375 |  |  | $ | 336,258 |
Premises and leasehold improvements | 3 - 40 |  | 1,307,502 |  |  | 1,286,092 |
Furniture, equipment and software | 3 - 10 |  | 671,172 |  |  | 639,109 |
Total |  |  | 2,313,049 |  |  | 2,261,459 |
Less accumulated depreciation and amortization |  |  | 1,079,631 |  |  | 1,010,176 |
Total premises and equipment |  |  | $ | 1,233,418 |  |  | $ | 1,251,283 |
Depreciation and amortization expense was $106.6 million, $108.6 million and $103.8 million for the years ended December 31, 2021, 2020 and 2019, respectively.

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- Definition The entire disclosure for long-lived, physical asset used in normal conduct of business and not intended for resale. Includes, but is not limited to, work of art, historical treasure, and similar asset classified as collections. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 958 -SubTopic 360 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=120429125&loc=d3e99893-112916 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -URI http://asc.fasb.org/topic&trid=2155823 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 958 -SubTopic 360 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=120429125&loc=SL120174063-112916 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 958 -SubTopic 360 -Section 50 -Paragraph 1 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=120429125&loc=d3e99779-112916 + Details
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