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Commitments and Contingent Liabilities - Amount of Commitment Expiration Per Period (Details) $ in Thousands | Sep. 30, 2019 USD ($)
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Schedule of Costs Related to Purchase Obligations [Line Items] |
Guarantor obligations, maximum exposure | $ 303,175
Less Than 1 Year |
Schedule of Costs Related to Purchase Obligations [Line Items] |
Guarantor obligations, maximum exposure | 126,900
1-3 Years |
Schedule of Costs Related to Purchase Obligations [Line Items] |
Guarantor obligations, maximum exposure | 176,275
3-5 Years |
Schedule of Costs Related to Purchase Obligations [Line Items] |
Guarantor obligations, maximum exposure | 0
Beyond 5 Years |
Schedule of Costs Related to Purchase Obligations [Line Items] |
Guarantor obligations, maximum exposure | 0
Standby Letters of Credit | Firm Transportation |
Schedule of Costs Related to Purchase Obligations [Line Items] |
Guarantor obligations, maximum exposure | 198,316
Standby Letters of Credit | Other |
Schedule of Costs Related to Purchase Obligations [Line Items] |
Guarantor obligations, maximum exposure | 750
Standby Letters of Credit | Loss Contingencies by Secondary Nature of Contingency |
Schedule of Costs Related to Purchase Obligations [Line Items] |
Guarantor obligations, maximum exposure | 199,066
Standby Letters of Credit | Less Than 1 Year | Firm Transportation |
Schedule of Costs Related to Purchase Obligations [Line Items] |
Guarantor obligations, maximum exposure | 80,244
Standby Letters of Credit | Less Than 1 Year | Other |
Schedule of Costs Related to Purchase Obligations [Line Items] |
Guarantor obligations, maximum exposure | 750
Standby Letters of Credit | Less Than 1 Year | Loss Contingencies by Secondary Nature of Contingency |
Schedule of Costs Related to Purchase Obligations [Line Items] |
Guarantor obligations, maximum exposure | 80,994
Standby Letters of Credit | 1-3 Years | Firm Transportation |
Schedule of Costs Related to Purchase Obligations [Line Items] |
Guarantor obligations, maximum exposure | 118,072
Standby Letters of Credit | 1-3 Years | Other |
Schedule of Costs Related to Purchase Obligations [Line Items] |
Guarantor obligations, maximum exposure | 0
Standby Letters of Credit | 1-3 Years | Loss Contingencies by Secondary Nature of Contingency |
Schedule of Costs Related to Purchase Obligations [Line Items] |
Guarantor obligations, maximum exposure | 118,072
Standby Letters of Credit | 3-5 Years | Firm Transportation |
Schedule of Costs Related to Purchase Obligations [Line Items] |
Guarantor obligations, maximum exposure | 0
Standby Letters of Credit | 3-5 Years | Other |
Schedule of Costs Related to Purchase Obligations [Line Items] |
Guarantor obligations, maximum exposure | 0
Standby Letters of Credit | 3-5 Years | Loss Contingencies by Secondary Nature of Contingency |
Schedule of Costs Related to Purchase Obligations [Line Items] |
Guarantor obligations, maximum exposure | 0
Standby Letters of Credit | Beyond 5 Years | Firm Transportation |
Schedule of Costs Related to Purchase Obligations [Line Items] |
Guarantor obligations, maximum exposure | 0
Standby Letters of Credit | Beyond 5 Years | Other |
Schedule of Costs Related to Purchase Obligations [Line Items] |
Guarantor obligations, maximum exposure | 0
Standby Letters of Credit | Beyond 5 Years | Loss Contingencies by Secondary Nature of Contingency |
Schedule of Costs Related to Purchase Obligations [Line Items] |
Guarantor obligations, maximum exposure | 0
Surety Bond | Other |
Schedule of Costs Related to Purchase Obligations [Line Items] |
Guarantor obligations, maximum exposure | 9,306
Surety Bond | Employee-Related |
Schedule of Costs Related to Purchase Obligations [Line Items] |
Guarantor obligations, maximum exposure | 1,850
Surety Bond | Environmental |
Schedule of Costs Related to Purchase Obligations [Line Items] |
Guarantor obligations, maximum exposure | 11,283
Surety Bond | Financial Guarantees |
Schedule of Costs Related to Purchase Obligations [Line Items] |
Guarantor obligations, maximum exposure | 81,670
Surety Bond | Loss Contingencies by Secondary Nature of Contingency |
Schedule of Costs Related to Purchase Obligations [Line Items] |
Guarantor obligations, maximum exposure | 104,109
Surety Bond | Less Than 1 Year | Other |
Schedule of Costs Related to Purchase Obligations [Line Items] |
Guarantor obligations, maximum exposure | 8,433
Surety Bond | Less Than 1 Year | Employee-Related |
Schedule of Costs Related to Purchase Obligations [Line Items] |
Guarantor obligations, maximum exposure | 0
Surety Bond | Less Than 1 Year | Environmental |
Schedule of Costs Related to Purchase Obligations [Line Items] |
Guarantor obligations, maximum exposure | 11,073
Surety Bond | Less Than 1 Year | Financial Guarantees |
Schedule of Costs Related to Purchase Obligations [Line Items] |
Guarantor obligations, maximum exposure | 26,400
Surety Bond | Less Than 1 Year | Loss Contingencies by Secondary Nature of Contingency |
Schedule of Costs Related to Purchase Obligations [Line Items] |
Guarantor obligations, maximum exposure | 45,906
Surety Bond | 1-3 Years | Other |
Schedule of Costs Related to Purchase Obligations [Line Items] |
Guarantor obligations, maximum exposure | 873
Surety Bond | 1-3 Years | Employee-Related |
Schedule of Costs Related to Purchase Obligations [Line Items] |
Guarantor obligations, maximum exposure | 1,850
Surety Bond | 1-3 Years | Environmental |
Schedule of Costs Related to Purchase Obligations [Line Items] |
Guarantor obligations, maximum exposure | 210
Surety Bond | 1-3 Years | Financial Guarantees |
Schedule of Costs Related to Purchase Obligations [Line Items] |
Guarantor obligations, maximum exposure | 55,270
Surety Bond | 1-3 Years | Loss Contingencies by Secondary Nature of Contingency |
Schedule of Costs Related to Purchase Obligations [Line Items] |
Guarantor obligations, maximum exposure | 58,203
Surety Bond | 3-5 Years | Other |
Schedule of Costs Related to Purchase Obligations [Line Items] |
Guarantor obligations, maximum exposure | 0
Surety Bond | 3-5 Years | Employee-Related |
Schedule of Costs Related to Purchase Obligations [Line Items] |
Guarantor obligations, maximum exposure | 0
Surety Bond | 3-5 Years | Environmental |
Schedule of Costs Related to Purchase Obligations [Line Items] |
Guarantor obligations, maximum exposure | 0
Surety Bond | 3-5 Years | Financial Guarantees |
Schedule of Costs Related to Purchase Obligations [Line Items] |
Guarantor obligations, maximum exposure | 0
Surety Bond | 3-5 Years | Loss Contingencies by Secondary Nature of Contingency |
Schedule of Costs Related to Purchase Obligations [Line Items] |
Guarantor obligations, maximum exposure | 0
Surety Bond | Beyond 5 Years | Other |
Schedule of Costs Related to Purchase Obligations [Line Items] |
Guarantor obligations, maximum exposure | 0
Surety Bond | Beyond 5 Years | Employee-Related |
Schedule of Costs Related to Purchase Obligations [Line Items] |
Guarantor obligations, maximum exposure | 0
Surety Bond | Beyond 5 Years | Environmental |
Schedule of Costs Related to Purchase Obligations [Line Items] |
Guarantor obligations, maximum exposure | 0
Surety Bond | Beyond 5 Years | Financial Guarantees |
Schedule of Costs Related to Purchase Obligations [Line Items] |
Guarantor obligations, maximum exposure | 0
Surety Bond | Beyond 5 Years | Loss Contingencies by Secondary Nature of Contingency |
Schedule of Costs Related to Purchase Obligations [Line Items] |
Guarantor obligations, maximum exposure | $ 0

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- Definition Schedule of Costs Related to Purchase Obligations [Line Items] + References No definition available. + Details
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- Definition Maximum potential amount of future payments (undiscounted) the guarantor could be required to make under the guarantee or each group of similar guarantees before reduction for potential recoveries under recourse or collateralization provisions. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=118943654&loc=d3e12069-110248 + Details
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