Supplemental Cash Flow Information (Tables)

6 Months Ended

Jun. 30, 2016

Supplemental Cash Flow Elements [Abstract]

Supplemental Cash Flow Information

	Three months ended					Six months ended
	June 30, 2016		June 30, 2015			June 30, 2016		June 30, 2015
Supplemental disclosures:	(in thousands)
Interest paid	$	—	$	—		$	—	$	—
Income taxes paid	$	10,329	$	6,643		$	10,847	$	10,846
Non-cash investing and financing activities:
Non-cash capital expenditures	1,047		(102		)	1,312		(173		)
Dividends declared	5,834		5,982			5,834		5,982