Accounts Receivable

12 Months Ended

Dec. 31, 2019

Accounts Receivable [Abstract]

Accounts Receivable

Note 5 – Accounts Receivable

	December 31,
		2019		2018
Billed utility revenue	$	69,205	$	68,347
Other		5,285		4,392
		74,490		72,739
Less allowance for doubtful accounts		7,353		6,914
Net accounts receivable	$	67,137	$	65,825

The Company’s utility customers are located principally in the following states: 47% in Pennsylvania, 15% in Ohio, 10% in North Carolina, 8% in Texas, and 8% in Illinois. No single customer accounted for more than one percent of the Company's regulated operating revenues during the years ended December 31, 2019, 2018, and 2017. The following table summarizes the changes in the Company’s allowance for doubtful accounts:

	2019		2018		2017
Balance at January 1,	$	6,914	$	7,071	$	7,095
Amounts charged to expense		5,306		5,305		4,986
Accounts written off		(5,980)		(6,587)		(6,135)
Recoveries of accounts written off		1,113		1,125		1,125
Balance at December 31,	$	7,353	$	6,914	$	7,071