Century Bancorp boosted earnings 6.1 percent year-over-year and grew assets to a new record in the second quarter this year.

The parent company of Century Bank and Trust posted net income of $11.6 million for the period ended June 30. Total assets increased 7.4 percent to $4.2 billion from the year-ago period.

Net interest income totaled $36.1 million for the six months ended June 30, compared with $34.1 million for the same period in 2015. The company attributed the 5.8 percent increase to an increase in average earning assets. The net interest margin remained stable for the first half of 2016, compared with last year.

Net loans increased almost 32 percent year-over-year to $1.8 billion.

For the six month period ended June 30, the company boosted its provision for loan losses to $800,000 compared with $200,000 a year ago to keep up with the increase in loan balances.

Century Bancorp’s allowance for loan losses totaled $23.9 million and represented 1.32 percent of loans outstanding at June 30, compared with $23.1 million and 1.33 percent at year-end 2015 and $22.2 million or 1.44 percent last year. The change in the ratio of the allowance for loan losses to loans outstanding, when compared with the year-ago period, was primarily due to changes in portfolio composition, the company said. Non-performing assets totaled $1.5 million at June 30, compared with $2.3 million at Dec. 31, 2015 and $4.1 million a year ago.

The company’s board of directors voted a regular quarterly dividend of 12 cents per share on its Class A common stock, and 6 cents per share on its Class B common stock, to be paid on Aug. 15 to stockholders of record on Aug. 1.