Supplemental Cash Flow Information (Tables)

9 Months Ended

Sep. 30, 2019

Supplemental Cash Flow Elements [Abstract]

Supplemental Cash Flow Information

	Nine Months  Ended  September 30,
		2019			2018
		(in thousands)
Net cash provided from operating activities included:
Income taxes refunded from taxing authorities	$	—		$	7,521
Interest paid		(151,602	)		(161,444	)
Non-cash investing and financing activities included:
Increase in asset retirement costs capitalized		812			20,452
Decrease in accrued capital expenditures		(4,424	)		(107,070	)