ALLOWANCE FOR CREDIT LOSSES:

6 Months Ended

Sep. 30, 2020

Trade accounts receivable are presented net of allowances for credit losses, returns and credits based on the probability of future collections. The probability of future collections is based on specific considerations of historical loss patterns and an assessment of the continuation of such patterns based on past collection trends and known or anticipated future economic events that may impair collectability. We are monitoring the impacts from the COVID-19 pandemic on our customers and various counterparties, and have recorded an incremental reserve associated with the pandemic during the three and six months ended September 30, 2020.

A summary of the activity of the allowance for doubtful accounts, returns and credits was (dollars in thousands):


For the six months ended:	Balance at beginning of period		Additions charged to costs and expenses		Other changes		Bad debts written off, net of amounts recovered		Balance at end of period
September 30, 2020	$	7,575	$	2,522	$	56	$	(1,141)	$	9,012