Leases (Tables)

12 Months Ended

Dec. 31, 2019

Leases [Abstract]

Lease, Cost

The following table summarizes the Company's lease costs.

	Year Ended   December 31, 2019
	(Thousands)
Operating lease costs	$	57,517
Variable lease costs (a)	17,143
Total lease costs (b)	$	74,660

(a) Includes short-term lease costs.

(b)

Includes drilling rig lease costs capitalized to property, plant and equipment of $58.5 million, of which $48.1 million are operating lease costs.

Lessee, Operating Lease, Liability, Maturity

The following table summarizes undiscounted future cash flows owed by the Company to lessors pursuant to lease contracts in effect as of December 31, 2019.

	December 31, 2019
	(Thousands)
2020	$	30,488
2021	9,186
2022	8,499
2023	8,417
2024	5,985
Thereafter	28
Total lease payments	62,603
Less: Interest	(3,618		)
Present value of lease liabilities	$	58,985