Selected Balance Sheet Information:

6 Months Ended

Jun. 30, 2020

Selected Balance Sheet Information [Abstract]

Accounts Receivable and Allowance for Credit Losses

Following is a summary of Accounts receivable, net included in the accompanying Condensed Consolidated Balance Sheets (in thousands) as of:


	June 30, 2020		December 31, 2019
Accounts receivable, trade	$	122,650	$	144,747
Unbilled revenue	55,915		113,502
Less: Allowance for credit losses	(7,585)		(2,444)
Accounts receivable, net	$	170,980	$	255,805

Changes to allowance for credit losses for the six months ended June 30, 2020 and 2019, respectively, were as follows (in thousands):


	Balance at Beginning of Year		Additions Charged to Costs and Expenses		Recoveries and Other Additions		Write-offs and Other Deductions		Balance at June 30,
2020	$	2,444	$	6,715	$	2,203	$	(3,777)	$	7,585
2019	$	3,209	$	4,913	$	1,870	$	(4,906)	$	5,086

Due to the COVID-19 pandemic, all of our jurisdictions temporarily suspended disconnections for a period of time, which increased our accounts receivable arrears balances. As a result, we increased our allowance for credit losses and bad debt expense for the six months ended June 30, 2020 by $2.0 million.

The ongoing credit evaluation of our customers during the COVID-19 pandemic is further discussed in the Credit Risk section of Note 9.

Materials, Supplies and Fuel

The following amounts by major classification are included in Materials, supplies and fuel on the accompanying Condensed Consolidated Balance Sheets (in thousands) as of:


	June 30, 2020		December 31, 2019
Materials and supplies	$	92,284	$	82,809
Fuel - Electric Utilities	3,574		2,425
Natural gas in storage	10,129		31,938
Total materials, supplies and fuel	$	105,987	$	117,172

Accrued Liabilities

The following amounts by major classification are included in Accrued liabilities on the accompanying Condensed Consolidated Balance Sheets (in thousands) as of:


	June 30, 2020		December 31, 2019
Accrued employee compensation, benefits and withholdings	$	59,701	$	62,837
Accrued property taxes	36,832		44,547
Customer deposits and prepayments	45,143		54,728
Accrued interest	31,757		31,868
Other (none of which is individually significant)	28,234		32,787
Total accrued liabilities	$	201,667	$	226,767