Old National’s revenue from contracts with customers in the scope of Topic 606 is recognized within noninterest income. The consolidated statements of income include all categories of noninterest income. The following table reflects only the categories of noninterest income that are within the scope of Topic 606:

	Three Months Ended
	March 31,
(dollars in thousands)	2019		2018
Wealth management fees	$	8,535	$	9,026
Service charges on deposit accounts		10,826		10,759
Debit card and ATM fees		5,503		4,865
Investment product fees		5,271		5,031
Other income:
Merchant processing fees		707		641
Gain (loss) on other real estate owned		40		135
Safe deposit box fees		411		404
Insurance premiums and commissions		200		104
Total	$	31,493	$	30,965

Wealth management fees: Old National earns wealth management fees based upon asset custody and investment management services provided to individual and institutional customers. Most of these customers receive monthly or quarterly billings for services rendered based upon the market value of assets in custody. Fees that are transaction based are recognized at the point in time that the transaction is executed.

Service charges on deposit accounts: Old National earns fees from deposit customers for transaction-based, account maintenance, and overdraft services. Transaction-based fees and overdraft fees are recognized at a point in time, since the customer generally has a right to cancel the depository arrangement at any time. The arrangement is considered a day-to-day contract with ongoing renewals and optional purchases, so the duration of the contract does not extend beyond the services already performed. Account maintenance fees, which relate primarily to monthly maintenance, are earned over the course of a month, representing the period over which Old National satisfies its performance obligation.

Debit card and ATM fees: Debit card and ATM fees include ATM usage fees and debit card interchange income. As with the transaction-based fees on deposit accounts, the ATM fees are recognized at the point in time that Old National fulfills the customer’s request. Old National earns interchange fees from cardholder transactions processed through card association networks. Interchange rates are generally set by the card associations based upon purchase volumes and other factors. Interchange fees represent a percentage of the underlying transaction value and are recognized daily, concurrently with the transaction processing services provided to the cardholder.

Investment product fees: Investment product fees are the commissions and fees received from a registered broker/dealer and investment adviser that provide those services to Old National customers. Old National acts as an agent in arranging the relationship between the customer and the third-party service provider. These fees are recognized monthly from the third-party broker based upon services already performed, net of the processing fees charged to Old National by the broker.