(Thousands of Dollars) | 2013 | 2012 | 2011 | |||||||||
Interest income | $ | 8,343 | $ | 10,327 | $ | 10,639 | ||||||
Other nonoperating income | 3,025 | 3,483 | 3,722 | |||||||||
Insurance policy expense | (8,292 | ) | (7,365 | ) | (4,785 | ) | ||||||
Other nonoperating expense | (104 | ) | (270 | ) | (321 | ) | ||||||
Other income, net | $ | 2,972 | $ | 6,175 | $ | 9,255 |