As of the census of 2000, there were 14,557 people, 6,086 households, and 4,162 families residing in the city. The population density was 477.1/km² (1,236.0/mi²). There were 6,551 housing units at an average density of 214.7/km² (556.2/mi²). The racial makeup of the city was 92.66% White, 0.32% African American, 1.14% Native American, 1.64% Asian, 0.13% Pacific Islander, 1.48% from other races, and 2.63% from two or more races. Hispanic or Latino of any race were 3.15% of the population.
There were 6,086 households out of which 28.3% had children under the age of 18 living with them, 56.2% were married couples living together, 9.3% had a female householder with no husband present, and 31.6% were non-families. 26.6% of all households were made up of individuals and 13.9% had someone living alone who was 65 years of age or older. The average household size was 2.37 and the average family size was 2.84.
In the city the population was spread out with 23.4% under the age of 18, 5.5% from 18 to 24, 24.8% from 25 to 44, 25.5% from 45 to 64, and 20.8% who were 65 years of age or older. The median age was 43 years. For every 100 females there were 93.4 males. For every 100 females age 18 and over, there were 90.4 males.
The median income for a household in the city was $41,930, and the median income for a family was $49,531. Males had a median income of $38,080 versus $27,080 for females. The per capita income for the city was $22,297. About 6.0% of families and 7.7% of the population were below the poverty line, including 7.4% of those under age 18 and 7.1% of those age 65 or over.