Trade Accounts Receivable	9 Months Ended
Sep. 30, 2019
Trade Accounts Receivable
Trade Accounts Receivable	(3) Trade Accounts Receivable The allowance for doubtful accounts, which was $1.8 million and $1.7 million at September 30, 2019 and December 31, 2018, respectively, is our best estimate of the amount of probable credit losses included in our existing accounts receivable. During the nine months ended September 30, 2019, we recognized bad debt expense of $0.3 million and wrote-off $0.2 million of receivables on accounts previously reserved, resulting in a $0.1 million increase in our allowance for doubtful accounts. During the three and nine months ended September 30, 2018, we increased our allowance for doubtful accounts by $0.5 million and $0.9 million, respectively, due primarily to estimated uncollectible amounts from customers of the USA Compression Predecessor.

Trade Accounts Receivable

9 Months Ended

Sep. 30, 2019

(3) Trade Accounts Receivable

The allowance for doubtful accounts, which was $1.8 million and $1.7 million at September 30, 2019 and December 31, 2018, respectively, is our best estimate of the amount of probable credit losses included in our existing accounts receivable.

During the nine months ended September 30, 2019, we recognized bad debt expense of $0.3 million and wrote-off $0.2 million of receivables on accounts previously reserved, resulting in a $0.1 million increase in our allowance for doubtful accounts.

During the three and nine months ended September 30, 2018, we increased our allowance for doubtful accounts by $0.5 million and $0.9 million, respectively, due primarily to estimated uncollectible amounts from customers of the USA Compression Predecessor.