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Goodwill and Other Intangible Assets (Intangible Assets) (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2019 | Dec. 31, 2020 | Dec. 31, 2019
Amortized intangible assets |  |  |
Original Cost | $ 294,940 | $ 289,290 | $ 294,940
Accumulated Amortization | 119,628 | 146,350 | 119,628
Net Book Value | 175,312 | 142,940 | 175,312
Customer list |  |  |
Amortized intangible assets |  |  |
Original Cost | 131,832 | 131,432 | 131,832
Accumulated Amortization | 33,971 | 45,946 | 33,971
Net Book Value | 97,861 | 85,486 | 97,861
Non-compete agreements |  |  |
Amortized intangible assets |  |  |
Original Cost | 23,813 | 21,346 | 23,813
Accumulated Amortization | 12,446 | 15,711 | 12,446
Net Book Value | 11,367 | 5,635 | 11,367
Supply agreement |  |  |
Amortized intangible assets |  |  |
Original Cost | 9,060 | 9,060 | 9,060
Accumulated Amortization | 6,526 | 6,988 | 6,526
Net Book Value | 2,534 | 2,072 | 2,534
Technology |  |  |
Amortized intangible assets |  |  |
Original Cost | 13,400 | 13,400 | 13,400
Accumulated Amortization | 6,197 | 7,538 | 6,197
Net Book Value | 7,203 | 5,862 | 7,203
Trademarks and patents |  |  |
Amortized intangible assets |  |  |
Original Cost | 15,810 | 15,810 | 15,810
Accumulated Amortization | 9,491 | 10,764 | 9,491
Net Book Value | 6,319 | 5,046 | 6,319
Lease intangible |  |  |
Amortized intangible assets |  |  |
Original Cost | 9,744 | 8,195 | 9,744
Accumulated Amortization | 4,600 | 5,368 | 4,600
Net Book Value | 5,144 | 2,827 | 5,144
Software |  |  |
Amortized intangible assets |  |  |
Original Cost | 90,836 | 89,038 | 90,836
Accumulated Amortization | 46,010 | 53,626 | 46,010
Net Book Value | 44,826 | 35,412 | 44,826
Other |  |  |
Amortized intangible assets |  |  |
Original Cost | 445 | 1,009 | 445
Accumulated Amortization | 387 | 409 | 387
Net Book Value | 58 | $ 600 | $ 58
Minimum |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Useful Life (in years) |  | 1 year |
Minimum | Customer list |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Useful Life (in years) |  | 3 years | 3 years
Minimum | Non-compete agreements |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Useful Life (in years) |  | 1 year | 1 year
Minimum | Supply agreement |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Useful Life (in years) |  | 10 years | 10 years
Minimum | Technology |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Useful Life (in years) |  | 10 years | 10 years
Minimum | Trademarks and patents |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Useful Life (in years) |  | 7 years | 7 years
Minimum | Lease intangible |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Useful Life (in years) |  | 1 year | 1 year
Minimum | Software |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Useful Life (in years) |  | 2 years | 2 years
Minimum | Other |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Useful Life (in years) |  | 3 years | 3 years
Maximum |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Useful Life (in years) |  | 10 years |
Maximum | Customer list |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Useful Life (in years) |  | 10 years | 10 years
Maximum | Non-compete agreements |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Useful Life (in years) |  | 7 years | 7 years
Maximum | Supply agreement |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Useful Life (in years) |  | 10 years | 10 years
Maximum | Technology |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Useful Life (in years) |  | 10 years | 10 years
Maximum | Trademarks and patents |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Useful Life (in years) |  | 10 years | 10 years
Maximum | Lease intangible |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Useful Life (in years) |  | 8 years | 8 years
Maximum | Software |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Useful Life (in years) |  | 10 years | 10 years
Maximum | Other |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Useful Life (in years) |  | 5 years | 5 years
Plant Nutrient | Trademarks and patents |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Impairment charges | $ 2,200 |  |

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