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LEASES (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019 | Jun. 01, 2021
Operating leases: |  |  |  |  |
Operating lease assets | $ 58,236 |  | $ 35,906 |  |
Accrued liabilities | 14,852 |  | 11,589 |  |
Operating lease liabilities | 56,444 |  | 28,344 |  |
Total operating lease liabilities | $ 71,296 |  | $ 39,933 |  |
Weighted-average remaining lease term (in years) | 5 years 7 months 6 days |  | 4 years 8 months 12 days |  |
Weighted-average discount rate | 4.70% |  | 3.10% |  |
Finance leases: |  |  |  |  |
Property, plant and equipment, gross | $ 33,359 |  | $ 6,970 |  |
Accumulated depreciation | (7,076) |  | (6,324) |  |
Property, plant and equipment, net | 26,283 |  | 646 |  |
Accrued liabilities | 531 |  | 459 |  |
Other non-current liabilities | 27,406 |  | 140 |  |
Total finance lease liabilities | $ 27,937 |  | $ 599 |  |
Weighted-average remaining lease term (in years) | 15 years 7 months 6 days |  | 1 year 6 months |  |
Weighted-average discount rate | 6.00% |  | 2.00% |  |
Lease expense |  |  |  |  |
Operating lease expense | $ 17,485 |  | $ 20,928 | $ 19,113 |
Amortization of right-of-use assets | 1,283 |  | 751 | 915 |
Interest on lease liabillities | 829 |  | 20 | 37 |
Total finance lease expense | 2,112 |  | 771 | 952 |
Supplemental cash flow information |  |  |  |  |
Lease assets obtained in exchange for lease obligations, operating leases | 38,630 | [1] | 11,000 | 11,637 |
Lease assets obtained in exchange for lease liabilities, finance leases | 26,941 | [2] | 0 | 350 |
Operating cash flows from operating leases | 8,444 | [3] | 19,026 | 17,737 |
Operating cash flows from finance leases | 8 |  | 20 | 37 |
Financing cash flows from finance leases | 421 |  | 735 | $ 883 |
Lease incentive received | 9,410 |  |  |  |
Maturities of operating lease liabilities |  |  |  |  |
2022 | 18,793 |  |  |  |
2023 | 14,628 |  |  |  |
2024 | 13,479 |  |  |  |
2025 | 11,326 |  |  |  |
2026 | 10,353 |  |  |  |
Thereafter | 17,096 |  |  |  |
Total lease payments | 85,675 |  |  |  |
Less lease incentive receivable | (2,458) |  |  |  |
Less imputed interest | (11,921) |  |  |  |
Total operating lease liabilities | 71,296 |  | 39,933 |  |
Maturities of finance lease liabilities |  |  |  |  |
2022 | 1,313 |  |  |  |
2023 | 2,709 |  |  |  |
2024 | 2,743 |  |  |  |
2025 | 2,777 |  |  |  |
2026 | 2,812 |  |  |  |
Thereafter | 31,879 |  |  |  |
Total lease payments | 44,233 |  |  |  |
Less imputed interest | (16,296) |  |  |  |
Total finance lease liabilities | $ 27,937 |  | $ 599 |  |
First American [Member] |  |  |  |  |
Supplemental cash flow information |  |  |  |  |
Operating lease assets acquired |  |  |  |  | $ 24,396
Real estate [Member] |  |  |  |  |
Operating leases: |  |  |  |  |
Weighted-average remaining lease term (in years) | 5 years 8 months 12 days |  |  |  |
Real estate [Member] | Maximum [Member] |  |  |  |  |
Operating leases: |  |  |  |  |
Remaining lease term | 10 years |  |  |  |
[1] | Operating lease assets obtained during 2021 included $24,396 acquired in conjunction with the acquisition of First American in June 2021 (Note 6).
[2] | Finance lease assets obtained during 2021 consisted of a lease on our corporate headquarters located in Minnesota that commenced in July 2021.
[3] | Cash paid for operating leases during 2021 was reduced by lease incentives received of $9,410.

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- Definition Amount of lessee's undiscounted obligation for lease payments in excess of discounted obligation for lease payments for operating lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=123408670&loc=SL77918701-209980 + Details
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- Definition Amount of single lease cost, calculated by allocation of remaining cost of lease over remaining lease term. Includes, but is not limited to, single lease cost, after impairment of right-of-use asset, calculated by amortization of remaining right-of-use asset and accretion of lease liability. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 55 -Paragraph 53 -URI http://asc.fasb.org/extlink&oid=123414884&loc=SL77918982-209971 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123408670&loc=SL77918686-209980 + Details
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- Definition Present value of lessee's discounted obligation for lease payments from operating lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123391704&loc=SL77918627-209977 + Details
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- Definition Present value of lessee's discounted obligation for lease payments from operating lease, classified as current. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123391704&loc=SL77918627-209977 + Details
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- Definition Present value of lessee's discounted obligation for lease payments from operating lease, classified as noncurrent. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123391704&loc=SL77918627-209977 + 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
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- Definition Amount of lessee's right to use underlying asset under operating lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123391704&loc=SL77918627-209977 + Details
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- Definition Weighted average discount rate for operating lease calculated at point in time. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (g)(4) -URI http://asc.fasb.org/extlink&oid=123408670&loc=SL77918686-209980 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 55 -Paragraph 53 -URI http://asc.fasb.org/extlink&oid=123414884&loc=SL77918982-209971 + Details
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- Definition Weighted average remaining lease term for operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 55 -Paragraph 53 -URI http://asc.fasb.org/extlink&oid=123414884&loc=SL77918982-209971 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)(3) -URI http://asc.fasb.org/extlink&oid=123408670&loc=SL77918686-209980 + Details
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- Definition Amount of increase in right-of-use asset obtained in exchange for finance lease liability. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 55 -Paragraph 53 -URI http://asc.fasb.org/extlink&oid=123414884&loc=SL77918982-209971 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)(2) -URI http://asc.fasb.org/extlink&oid=123408670&loc=SL77918686-209980 + Details
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- Definition Amount of increase in right-of-use asset obtained in exchange for operating lease liability. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 55 -Paragraph 53 -URI http://asc.fasb.org/extlink&oid=123414884&loc=SL77918982-209971 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)(2) -URI http://asc.fasb.org/extlink&oid=123408670&loc=SL77918686-209980 + Details
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