Revenue from Contracts with Customers (Tables)

3 Months Ended

9 Months Ended

Sep. 30, 2021

Revenue from Contract with Customer [Abstract]

Revenue from Contracts with Customers by Source

The following table presents the Partnership's Coal Royalty and Other segment revenues by major source:


	For the Three Months Ended September 30,				For the Nine Months Ended September 30,
(In thousands)	2021		2020		2021		2020
Coal royalty revenues	$	32,432	$	10,610	$	66,095	$	40,559
Production lease minimum revenues	3,235		4,267		10,241		13,554
Minimum lease straight-line revenues	4,808		3,553		15,773		12,349
Property tax revenues	1,466		1,896		4,522		4,256
Wheelage revenues	1,964		1,680		5,589		5,468
Coal overriding royalty revenues	757		1,314		3,592		3,319
Lease amendment revenues	1,519		858		3,159		2,591
Aggregates royalty revenues	429		221		1,339		1,068
Oil and gas royalty revenues	1,154		1,078		3,420		4,923
Other revenues	120		263		692		752
Coal royalty and other revenues	$	47,884	$	25,740	$	114,422	$	88,839
Transportation and processing services revenues (1)	2,171		2,204		6,545		6,651
Total coal royalty and other segment revenues	$	50,055	$	27,944	$	120,967	$	95,490

(1)Transportation and processing services revenues from contracts with customers as defined under ASC 606 was $1.2 million for the three months ended September 30, 2021 and 2020, and $3.7 million for the nine months ended September 30, 2021 and 2020. The remaining transportation and processing services revenues of $0.9 million and $1.0 million for the three months ended September 30, 2021 and 2020, respectively, and $2.8 million and $2.9 million for the nine months ended September 30, 2021 and 2020, respectively, related to other NRP-owned infrastructure leased to and operated by third-party operators accounted for under other guidance. See Note 14. Financing Trans action for more information.

Schedule of Receivables and Liabilities from Contracts with Customers

The following table details the Partnership's Coal Royalty and Other segment receivables and liabilities resulting from contracts with customers:


	September 30,		December 31,
(In thousands)	2021		2020
Receivables
Accounts receivable, net	$	20,999	$	10,193
Other current assets, net (1)	871		3,307
Other long-term assets, net (2)	250		525

Contract liabilities
Current portion of deferred revenue	$	11,201	$	11,485
Deferred revenue	48,232		50,069

(1)Other current assets, net includes short-term notes receivables from contracts with customers.

(2)Other long-term assets, net includes long-term lease amendment fee receivables from contracts with customers.

The following table shows the activity related to the Partnership's Coal Royalty and Other segment deferred revenue:


	For the Nine Months Ended September 30,
(In thousands)		2021		2020


Balance at beginning of period (current and non-current)		$	61,554	$	51,821
Increase due to minimums and lease amendment fees		6,411		38,005
Recognition of previously deferred revenue		(8,532)		(27,811)
Balance at end of period (current and non-current)		$	59,433	$	62,015

Schedule of Annual Minimums by Current Remaining Contract Term

The Partnership's non-cancelable annual minimum payments due under the lease terms of its coal and aggregates royalty leases are as follows as of September 30, 2021 (in thousands):


Lease Term (1)	Weighted Average Remaining Years	Annual Minimum Payments (2)
0 - 5 years	4.3	$	16,302
5 - 10 years	4.5	7,529
10+ years	13.7	27,363
Total	8.7	$	51,194

(1)Lease term does not include renewal periods.

(2)Annual minimum payments do not include $4.8 million of the $10.0 million of fixed consideration owed to NRP for the remainder of 2021 resulting from contract modifications entered into during the second quarter of 2020. Additionally, $1.3 million of this remaining $4.8 million relates to a coal infrastructure lease that is accounted for as a financing transaction. See Note 14. Financing Transaction for more information.