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Leases - Cash Paid for Amounts Included in the Measurements of Lease Liabilities and Leased Assets (Details) - USD ($) $ in Thousands | 12 Months Ended
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Jan. 01, 2022 | Jan. 02, 2021 | Dec. 28, 2019
Cash paid for amounts included in the measurements of lease liabilities |  |  |
Operating cash flows from operating / finance leases | $ 24,679 | $ 31,461 | $ 26,446
Financing cash flows from finance leases | 2,671 | 674 | 419
Leased assets obtained in exchange for new operating / finance lease liabilities | $ 49,344 | $ 27,260 | $ 25,268

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- Definition Cash Flow, Lessee [Abstract] + References No definition available. + Details
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Balance Type: | na
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- Definition Right-Of-Use Asset Obtained in Exchange For Operating Lease Liability And Financing Lease Liability + References No definition available. + Details
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Namespace Prefix: | hni_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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- Definition Amount of cash outflow for principal payment on finance lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 5 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123391704&loc=SL77918643-209977 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (g)(1) -URI http://asc.fasb.org/extlink&oid=123408670&loc=SL77918686-209980 + Details
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- Definition Amount of cash outflow from operating lease, excluding payments to bring another asset to condition and location necessary for its intended use. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 5 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=123391704&loc=SL77918643-209977 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (g)(1) -URI http://asc.fasb.org/extlink&oid=123408670&loc=SL77918686-209980 + Details
Name: | us-gaap_OperatingLeasePayments
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Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration