Revenue

Our revenue is comprised primarily of interest income, service charges and fees, gains on the sale of loans and AFS securities, earnings on corporate owned life insurance policies, and other noninterest income. Other noninterest income is typically service and performance driven in nature and comprised primarily of investment and trust advisory fees. We recognize revenue, excluding interest income, in accordance with ASC 606, Revenue From Contracts with Customers. Revenue is recognized when our performance obligation has been satisfied according to our contractual obligation.

We record receivables when revenue is unpaid and collectability is reasonably assured. Accounts receivable balances primarily represent amounts due from customers for which revenue has been recognized. Accounts receivable balances are recorded in the consolidated balance sheets in accrued interest receivable and other assets. For the three month periods ended March 31, 2019 and 2018, we satisfied our performance obligations pursuant to contracts with customers. As a result, we have not recorded any contract assets or liabilities. We estimate no returns or allowances for the three month periods ended March 31, 2019 and 2018.

Our contracts with customers define our performance obligations with clearly established pricing which does not require us to allocate or disaggregate revenue by performance obligation. A summary of revenue recognized for each major category of contracts with customers, subject to ASC 606, is as follows for the:



	Three Months Ended March 31
	2019		2018
Debit card income	$	583	$	588
Trust service fees	509		502
Investment advisory fees	168		156
Service charges and fees related to deposit accounts	79		85
Total	$	1,339	$	1,331

A large portion of our revenue consists of interest income which is not subject to the requirements set forth in ASC 606.