Inventories and natural gas in storage (Tables)

3 Months Ended

Mar. 31, 2017

Inventory Disclosure [Abstract]

Inventories

Inventories consisted of:

	March 31, 2017		March 31, 2016		December 31, 2016
	(In thousands)
Aggregates held for resale	$	120,392	$	127,101	$	115,471
Asphalt oil	50,538		52,065		29,103
Materials and supplies	22,074		21,645		18,372
Merchandise for resale	16,546		17,441		16,437
Natural gas in storage (current)	11,282		11,305		25,761
Other	29,777		30,199		33,129
Total	$	250,609	$	259,756	$	238,273