Other assets (Tables)

12 Months Ended

Dec. 31, 2016

Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]

Other Assets

Other assets consist of the following:

	2016			2015
Supplies and consumables inventory	$	15,568		$	14,977
Income tax receivable	2,951			3,096
Deferred financing costs	10,198			3,211
Other	6,136			4,306
	34,853			25,590
Less current portion	(18,519		)	(18,073		)
	$	16,334		$	7,517