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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, 2019
Dec. 31, 2018
Amortized intangible assets      
Original Cost $ 294,940 $ 294,940 $ 183,034
Accumulated Amortization 119,628 119,628 83,896
Net Book Value 175,312 175,312 99,138
Customer list      
Amortized intangible assets      
Original Cost 131,832 131,832 40,570
Accumulated Amortization 33,971 33,971 21,706
Net Book Value 97,861 97,861 18,864
Non-compete agreements      
Amortized intangible assets      
Original Cost 23,813 23,813 3,313
Accumulated Amortization 12,446 12,446 2,753
Net Book Value 11,367 11,367 560
Supply agreement      
Amortized intangible assets      
Original Cost 9,060 9,060 9,060
Accumulated Amortization 6,526 6,526 5,824
Net Book Value 2,534 2,534 3,236
Technology      
Amortized intangible assets      
Original Cost 13,400 13,400 13,400
Accumulated Amortization 6,197 6,197 4,857
Net Book Value 7,203 7,203 8,543
Trademarks and patents      
Amortized intangible assets      
Original Cost 15,810 15,810 17,985
Accumulated Amortization 9,491 9,491 7,682
Net Book Value 6,319 6,319 10,303
Lease intangible      
Amortized intangible assets      
Original Cost 9,744 9,744 11,564
Accumulated Amortization 4,600 4,600 3,602
Net Book Value 5,144 5,144 7,962
Software      
Amortized intangible assets      
Original Cost 90,836 90,836 86,723
Accumulated Amortization 46,010 46,010 37,112
Net Book Value 44,826 44,826 49,611
Other      
Amortized intangible assets      
Original Cost 445 445 419
Accumulated Amortization 387 387 360
Net Book Value 58 $ 58 $ 59
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