Receivables and allowance for expected credit losses

9 Months Ended

Sep. 30, 2020

Credit Loss [Abstract]

Receivables and allowance for expected credit loss

Receivables and allowance for expected credit losses

Receivables consists primarily of trade receivables from the sale of goods and services, which are recorded at the invoiced amount, and contract assets, net of expected credit losses. For more information on contract assets, see Note 8. The Company's trade accounts receivable are all due in 12 months or less. The total balance of receivables past due 90 days or more was $48.9 million, $56.0 million and $46.7 million at September 30, 2020 and 2019, and December 31, 2019, respectively.

The Company's expected credit losses are determined through a review using historical credit loss experience, changes in asset specific characteristics, current conditions and reasonable and supportable future forecasts, among other specific account data, and is performed at least quarterly. The Company develops and documents its methodology to determine its allowance for expected credit losses at each of its reportable business segments. Risk characteristics used by the business segments may include customer mix, knowledge of customers and general economic conditions of the various local economies, among others. Specific account balances are written off when management determines the amounts to be uncollectible.

Details of the Company's expected credit losses were as follows:

	Electric		Natural gas distribution		Pipeline		Construction materials and contracting		Construction services		Total
	(In thousands)
At January 1, 2020	$	328	$	1,056	$	—	$	5,357	$	1,756	$	8,497
Current expected credit loss provision	555		1,156		—		694		1,150		3,555
Less write-offs charged against the allowance	500		624		—		68		73		1,265
Credit loss recoveries collected	109		229		—		—		—		338
At March 31, 2020	$	492	$	1,817	$	—	$	5,983	$	2,833	$	11,125
Current expected credit loss provision	303		190		—		(314)		896		1,075
Less write-offs charged against the allowance	224		677		—		44		454		1,399
Credit loss recoveries collected	88		201		—		—		—		289
At June 30, 2020	$	659	$	1,531	$	—	$	5,625	$	3,275	$	11,090
Current expected credit loss provision	435		811		2		728		1,635		3,611
Less write-offs charged against the allowance	269		692		—		229		117		1,307
Credit loss recoveries collected	75		203		—		—		—		278
At September 30, 2020	$	900	$	1,853	$	2	$	6,124	$	4,793	$	13,672

The Company's allowance for doubtful accounts at September 30, 2019 and December 31, 2019, was $8.7 million and $8.5 million, respectively.