sentences:  About 11.9% of families and 14.9% of the population were below the poverty line, including 21.2% of those under age 18 and 11.1% of those age 65 or over.As of the census of 2010, there were 55,683 people, 22,576 households, and 14,918 families residing in the city.The population density was 953.5 people per square mile (388.6/km2).