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Leases
3 Months Ended
Mar. 31, 2021
Leases [Abstract]  
Leases of Lessee Disclosure LEASES
Lease Revenue
Leasing revenue primarily consists of NW Natural's North Mist natural gas storage agreement with Portland General Electric (PGE), which is billed under an OPUC-approved rate schedule and includes an initial 30-year term with options to extend, totaling up to an additional 50 years upon mutual agreement of the parties. Under U.S. GAAP, this agreement is classified as a sales-type lease and qualifies for regulatory accounting deferral treatment. The investment in the storage facility is included in rate base under a separately established cost-of-service tariff, with revenues recognized according to the tariff schedule. As such, the selling profit that was calculated upon commencement as part of the sale-type lease recognition was deferred and will be amortized over the lease term. Billing rates under the cost-of-service tariff will be updated annually to reflect current information including depreciable asset levels, forecasted operating expenses, and the results of regulatory proceedings, as applicable, and revenue received under this agreement is recognized as operating revenue on the consolidated statements of comprehensive income. There are no variable payments or residual value guarantees. The lease does not contain an option to purchase the underlying assets.

NW Natural also maintains a sales-type lease for specialized compressor facilities to provide high pressure compressed natural gas (CNG) services. Lease payments are outlined in an OPUC-approved rate schedule over a 10-year term. There are no variable payments or residual value guarantees. The selling profit computed upon lease commencement was not significant.

Our lessor portfolio also contains small leases of property owned by NW Natural to third parties. These transactions are accounted for as operating leases and the revenue is recognized over the term of the lease agreement.

The components of lease revenue at NW Natural were as follows:
Three Months Ended March 31,
In thousands20212020
Lease revenue
Operating leases$18 $28 
Sales-type leases4,369 4,590 
Total lease revenue$4,387 $4,618 

Total future minimum lease payments to be received under non-cancellable leases at NW Natural at March 31, 2021 are as follows:
In thousandsOperatingSales-TypeTotal
Remainder of 2021$55 $13,090 $13,145 
202272 17,026 17,098 
202364 16,557 16,621 
202465 15,867 15,932 
202560 15,306 15,366 
Thereafter229 251,724 251,953 
Total lease revenue$545 $329,570 $330,115 
Less: imputed interest186,352 
Total leases receivable$143,218 

The total leases receivable above is reported under the NGD segment and the short- and long-term portions are included within other current assets and assets under sales-type leases on the consolidated balance sheets, respectively. The total amount of unguaranteed residual assets was $4.4 million, $4.1 million and $4.3 million at March 31, 2021 and 2020 and December 31, 2020, respectively, and is included in assets under sales-type leases on the consolidated balance sheets. Additionally, under regulatory accounting, the revenues and expenses associated with these agreements are presented on the consolidated statements of comprehensive income such that their presentation aligns with similar regulated activities at NW Natural.

Lease Expense
Operating Leases
We have operating leases for land, buildings and equipment. Our primary lease is for NW Natural's corporate operations center. Our leases have remaining lease terms of one year to 19 years. Many of our lease agreements include options to extend the lease, which we do not include in our minimum lease terms unless they are reasonably certain to be exercised. Short-term leases with a term of 12 months or less are not recorded on the balance sheet. As most of our leases do not provide an implicit rate and are entered into by NW Natural, we use an estimated discount rate representing the rate we would have incurred to
finance the funds necessary to purchase the leased asset and is based on information available at the lease commencement date in determining the present value of lease payments.

The components of lease expense, a portion of which is capitalized, were as follows:
Three Months Ended March 31,
In thousands20212020
NW Natural:
Operating lease expense$1,678 $1,202 
Short-term lease expense$220 $198 
Other (NW Holdings):
Operating lease expense$18 $52 
NW Holdings:
Operating lease expense$1,696 $1,254 
Short-term lease expense$220 $198 

Supplemental balance sheet information related to operating leases as of March 31, 2021 is as follows:
In thousandsMarch 31,December 31,
202120202020
NW Natural:
Operating lease right of use asset$76,857 $79,383 $77,328 
Operating lease liabilities - current liabilities$1,167 $984 $1,054 
Operating lease liabilities - non-current liabilities80,358 79,052 80,559 
Total operating lease liabilities$81,525 $80,036 $81,613 
Other (NW Holdings):
Operating lease right of use asset$100 $139 $118 
Operating lease liabilities - current liabilities$46 $87 $51 
Operating lease liabilities - non-current liabilities56 53 62 
Total operating lease liabilities$102 $140 $113 
NW Holdings:
Operating lease right of use asset$76,957 $79,522 $77,446 
Operating lease liabilities - current liabilities$1,213 $1,071 $1,105 
Operating lease liabilities - non-current liabilities80,414 79,105 80,621 
Total operating lease liabilities$81,627 $80,176 $81,726 

The weighted-average remaining lease terms and weighted-average discount rates for the operating leases at NW Natural were as follows:
In thousandsMarch 31,December 31,
202120202020
Weighted-average remaining lease term (years)18.919.719.2
Weighted-average discount rate7.22 %7.20 %7.23 %
Commencement of Significant Lease
NW Natural commenced a 20-year operating lease agreement in March 2020 for a new corporate operations center in Portland, Oregon. Total estimated base rent payments over the life of the lease are $159.4 million. There is an option to extend the term of the lease for two additional periods of seven years.

There is a material timing difference between the minimum lease payments and expense recognition as calculated under operating lease accounting rules. OPUC issued an order allowing us to align our expense recognition with cash payments for ratemaking purposes. We recorded the difference between the minimum lease payments and the aggregate of the imputed interest on the finance lease obligation and amortization of the right-of-use asset as a deferred regulatory asset on our balance sheet. The balance of the regulatory asset was $4.6 million, $0.6 million and $4.2 million as of March 31, 2021 and 2020 and December 31, 2020, respectively.

Maturities of operating lease liabilities at March 31, 2021 were as follows:
In thousandsNW NaturalOther
(NW Holdings)
NW Holdings
Remainder of 2021$5,161 $41 $5,202 
20226,933 24 6,957 
20236,986 6,992 
20247,150 7,156 
20257,185 7,191 
Thereafter123,784 24 123,808 
Total lease payments157,199 107 157,306 
Less: imputed interest75,674 75,679 
Total lease obligations81,525 102 81,627 
Less: current obligations1,167 46 1,213 
Long-term lease obligations$80,358 $56 $80,414 

As of March 31, 2021, finance lease liabilities with maturities of less than one year were $0.3 million at NW Natural.
Supplemental cash flow information related to leases was as follows:
Three Months Ended March 31,
In thousands20212020
NW Natural:
Cash paid for amounts included in the measurement of lease liabilities
Operating cash flows from operating leases$1,669 $1,196 
Finance cash flows from finance leases$544 $155 
Right of use assets obtained in exchange for lease obligations
Operating leases$154 $77,988 
Finance leases$74 $233 
Other (NW Holdings):
Cash paid for amounts included in the measurement of lease liabilities
Operating cash flows from operating leases$16 $52 
NW Holdings:
Cash paid for amounts included in the measurement of lease liabilities
Operating cash flows from operating leases$1,685 $1,248 
Finance cash flows from finance leases$544 $155 
Right of use assets obtained in exchange for lease obligations
Operating leases$154 $77,988 
Finance leases$74 $233 

Finance Leases
NW Natural also leases building storage spaces for use as a gas meter room in order to provide natural gas to multifamily or mixed use developments. These contracts are accounted for as finance leases and typically involve a one-time upfront payment with no remaining liability. The right of use assets for finance leases were $1.9 million, $0.7 million and $1.8 million at March 31, 2021 and 2020 and at December 31, 2020, respectively.