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Debt - Additional Information (Details) $ in Thousands |  |  | 12 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Jul. 29, 2014 USD ($) | Jul. 29, 2014 USD ($) | Jan. 23, 2013 USD ($) | Dec. 31, 2017 USD ($) Rate | Dec. 31, 2016 USD ($) | Dec. 31, 2015 USD ($) | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018 | Jan. 21, 2013 USD ($)
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Proceeds from Lines of Credit |  |  |  | $ 298,308 | $ 1,273,959 | $ 0 |  |  |  |  |
Accrued interest |  |  |  | 12,723 | 12,149 |  |  |  |  |  |
Credit facility, maximum borrowing capacity |  |  |  | 300,000 |  |  |  |  |  |  |
Repayments of Lines of Credit |  |  |  | $ 278,308 | 1,138,959 | $ 0 |  |  |  |  |
Outside equity interest percentage maximum | Rate |  |  |  | 0.00% |  |  |  |  |  |  |
Available incremental borrowings under Credit Agreements |  |  |  | $ 200,000 |  |  |  |  |  |  |
Available incremental borrowings under Credit Agreements, additional amount |  |  |  | $ 100,000 |  |  |  |  |  |  |
Lien leverage ratio, maximum |  |  |  | 3.00 |  |  |  |  |  |  |
Maximum percentage of Farm Credit Agreement outstanding amount to total outstanding amount from both Credit Agreements | Rate |  |  |  | 50.00% |  |  |  |  |  |  |
Line of Credit Facility, Fair Value of Amount Outstanding |  |  |  | $ 154,882 | $ 135,000 |  |  |  |  |  |
Minimum |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Description of Variable Rate Basis |  |  |  | 0.0125 |  |  |  |  |  |  |
Line of Credit Facility, Commitment Fee Percentage | Rate |  |  |  | 0.00% |  |  |  |  |  |  |
Maximum |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Description of Variable Rate Basis |  |  |  | 0.02 |  |  |  |  |  |  |
Line of Credit Facility, Commitment Fee Percentage | Rate |  |  |  | 0.00% |  |  |  |  |  |  |
Senior Notes |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Proceeds from long-term debt |  |  | $ 271,000 |  |  |  |  |  |  |  |
Interest rate increase [Domain] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Description of Variable Rate Basis |  |  |  | 0.0025 |  |  |  |  |  |  |
Contractual Interest Rate Reduction [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Description of Variable Rate Basis |  |  |  | 0.01 |  |  |  |  |  |  |
Senior Notes Due Twenty Twenty-five [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Debt instrument, principal amount | $ 300,000 | $ 300,000 |  |  |  |  |  |  |  |  |
Debt instrument, maturity date | Feb. 01, 2025 |  |  |  |  |  |  |  |  |  |
Debt instrument, interest rate | 5.375% | 5.375% |  |  |  |  |  |  |  |  |
Proceeds from long-term debt | $ 298,000 |  |  |  |  |  |  |  |  |  |
Redemption Price | 100.00% | 100.00% |  |  |  |  |  |  |  |  |
Senior Notes Due Twenty Twenty-five [Member] | Minimum |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument Redemption Notice Term |  | 30 days |  |  |  |  |  |  |  |  |
Senior Notes Due Twenty Twenty-five [Member] | Maximum |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument Redemption Notice Term |  | 60 days |  |  |  |  |  |  |  |  |
Senior Notes Due Twenty Twenty-Three [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Debt instrument, principal amount |  |  |  |  |  |  |  |  |  |  | $ 275,000
Debt instrument, interest rate |  |  |  |  |  |  |  |  |  |  | 4.50%
Revolving Credit Facility |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Outstanding stand by letters of credit |  |  |  | $ 7,600 |  |  |  |  |  |  |
Credit facility available to draw |  |  |  | 137,400 |  |  |  |  |  |  |
Wells Fargo [Domain] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Credit facility, maximum borrowing capacity |  |  |  | 200,000 |  |  |  |  |  |  |
Northwest Farm Credit [Domain] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Credit facility, maximum borrowing capacity |  |  |  | $ 100,000 |  |  |  |  |  |  |
Scenario, Forecast [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total leverage ratio |  |  |  |  |  |  |  | 4.00 | 4.25 | 4.50 |
Interest coverage ratio |  |  |  |  |  |  | 2.25 | 1.75 |  |  |

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