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Other Commitments and Contingencies - Additional Information (Detail) $ in Thousands, gal in Millions | 12 Months Ended
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Dec. 31, 2018 USD ($) gal
Subsequent Event [Line Items] |
Intercompany Agreements, Description | 3
Annual Estimate Of Volume Of Propane To Be Purchased | gal | 1.2
Debt Service Coverage Ratio | 1.25
Time to cure ratio | 5 days
Ratio based on average number of prior quarters | 6
Funds from operations interest coverage ratio minimum times | 2
Total debt to capital maximum | 65
Number Of Years to Collect Benefits | 20 years
Total purchase obligations for 2018 | $ 158,500
Total purchase obligations for 2019 - 2020 | 74,970
Total purchase obligations for 2021 - 2022 | 42,279
Total purchase obligations thereafter | 129,019
Maximum authorized liability under such guarantees and letters of credit | 95,000
Aggregate guaranteed amount | 76,500
Amount of letter of credit to our current primary insurance company | $ 7,000

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- Definition Minimum amount of purchase arrangement maturing after the fifth fiscal year following the latest fiscal year. Includes, but not limited to, recorded and unrecorded purchase obligations, long-term purchase commitments, and short-term purchase commitments. + References No definition available. + Details
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