Selected Balance Sheet Information:

3 Months Ended

Mar. 31, 2020

Selected Balance Sheet Information [Abstract]

Accounts Receivable

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



	March 31, 2020			December 31, 2019
Accounts receivable, trade	$	162,138		$	144,747
Unbilled revenue	81,927			113,502
Less: Allowance for credit losses	(5,162		)	(2,444		)
Accounts receivable, net	$	238,903		$	255,805

The ongoing credit evaluation of our customers during the COVID-19 pandemic is further discussed in the Credit Risk section of Note 9. The Company did not experience material credit losses or customer defaults during the three months ended March 31, 2020.

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:



	March 31, 2020		December 31, 2019
Materials and supplies	$	88,346	$	82,809
Fuel - Electric Utilities	3,049		2,425
Natural gas in storage	1,499		31,938
Total materials, supplies and fuel	$	92,894	$	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:



	March 31, 2020		December 31, 2019
Accrued employee compensation, benefits and withholdings	$	45,070	$	62,837
Accrued property taxes	45,666		44,547
Customer deposits and prepayments	43,524		54,728
Accrued interest	43,776		31,868
Other (none of which is individually significant)	25,409		32,787
Total accrued liabilities	$	203,445	$	226,767