Revenue Recognition (Tables)

12 Months Ended

Dec. 31, 2019

Revenue Recognition [Abstract]

Contract with Customer, Asset and Liability [Table Text Block]

The following table presents a reconciliation of our contract liabilities:

	December 31, 2019			December 31, 2018
	(Thousands)
Balance at beginning of period	$	236,730		$	247,296
Payments received and deferred	—			—
Recognized in revenue	(10,566		)	(10,566		)
Balance at end of period	$	226,164		$	236,730

Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table Text Block]

The following table presents the amount of the contract liabilities balance expected to be recognized as revenue when performance obligations are satisfied and the transaction price allocated to the remaining performance obligations under certain contracts as of December 31, 2019.

	Contract Liabilities		Remaining Performance Obligations
	(Thousands)
2020	$	10,568	$	2,266,208
2021	10,566		2,113,669
2022	10,566		2,026,532
2023	10,566		1,497,866
2024	10,568		1,393,435
Thereafter	173,330		12,698,673
Total	$	226,164	$	21,996,383