Supplemental Cash Flow Information (Tables)

12 Months Ended

Dec. 31, 2016

Supplemental Cash Flow Elements [Abstract]

Summary of cash paid for interest and income taxes

	Year Ended December 31,
(In thousands)	2016		2015			2014
Cash paid for interest and income taxes
Interest	$	86,723	$	92,749		$	58,487
Income taxes	688		7,550			77,029
Non-cash investing activities
Change in accrued capital costs	7,168		(194,947		)	72,603