XML 23 R11.htm IDEA: XBRL DOCUMENT
v3.21.2

Inventories and natural gas in storage | 9 Months Ended
--- | ---
Sep. 30, 2021
Inventory Disclosure [Abstract] |
Inventories and natural gas in storage | Inventories and natural gas in storage Natural gas in storage for the Company's regulated operations is generally valued at lower of cost or market using the last-in, first-out method or lower of cost or net realizable value using the average cost or first-in, first-out method. The majority of all other inventories are valued at the lower of cost or net realizable value using the average cost method. The portion of the cost of natural gas in storage expected to be used within 12 months was included in inventories. Inventories on the Consolidated Balance Sheets were as follows:
| September 30, 2021 | September 30, 2020 | December 31, 2020
| (In thousands)
Aggregates held for resale | $ | 183,693 |  | $ | 168,132 |  | $ | 175,782 |
Asphalt oil | 32,964 |  | 27,587 |  | 28,238 |
Natural gas in storage (current) | 28,683 |  | 27,135 |  | 21,919 |
Materials and supplies | 27,253 |  | 26,609 |  | 25,142 |
Merchandise for resale | 26,639 |  | 21,525 |  | 21,087 |
Other | 13,053 |  | 15,235 |  | 18,999 |
Total | $ | 312,285 |  | $ | 286,223 |  | $ | 291,167 |
The remainder of natural gas in storage, which largely represents the cost of gas required to maintain pressure levels for normal operating purposes, was included in noncurrent assets - other and was $47.5 million at September 30, 2021 and December 31, 2020, and $48.3 million at September 30, 2020.

X
- References No definition available. + Details
Name: | us-gaap_InventoryDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The entire disclosure for inventory. Includes, but is not limited to, the basis of stating inventory, the method of determining inventory cost, the classes of inventory, and the nature of the cost elements included in inventory. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 330 -URI http://asc.fasb.org/topic&trid=2126998 + Details
Name: | us-gaap_InventoryDisclosureTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration