7. Goodwill and Identifiable Intangible Assets

The following table presents details of identifiable intangible assets:

The following table presents amortization of intangible assets for the year ended December 31, 2014:

Based on the amount of intangible assets subject to amortization at December 31, 2014, the expected amortization expense for each of the next five fiscal years and thereafter is as follows:

The weighted-average amortization periods remaining by intangible asset category were as follows (in years):

During the year ended December 31, 2014, goodwill increased by $3,530 as a result of Cortina acquisition.