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Inventories and natural gas in storage (Tables)
9 Months Ended
Sep. 30, 2016
Inventory Disclosure [Abstract]  
Inventories
Inventories consisted of:
 
September 30, 2016

September 30, 2015

December 31, 2015

 
(In thousands)
Aggregates held for resale
$
119,078

$
115,736

$
115,854

Asphalt oil
23,480

33,581

36,498

Natural gas in storage (current)
35,625

28,222

21,023

Materials and supplies
18,584

19,404

16,997

Merchandise for resale
15,672

15,563

15,318

Other
33,351

33,481

34,861

Total
$
245,790

$
245,987

$
240,551