Iowa City-based MidWestOne Financial Group Inc. reported net income of $4.8 million for the quarter ended June 30, its first full quarter of operations after acquiring Central Bancshares Inc. of Golden Valley, Minn., and its affiliate Central Bank. Net income for the year-ago quarter was $4.5 million. MidWestOne reported $1.8 million in expenses related to the merger with Central Bank, which was finalized on April 2. MidWestOne reported $2.7 million in expenses in the second quarter of 2015 that were tied to the merger with Central Bancshares. Second-quarter earnings were highlighted by a 9.8 percent increase in interest income, a 10 percent increase in noninterest income, a $200,000 increase in loan-loss provisions to account for an increase in loans and a 15 percent increase in noninterest expense, primarily due to a 33.3 percent increase in salaries and employee benefits related to the merger.