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Goodwill and other intangibles
12 Months Ended
Dec. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill and other intangibles
Goodwill and other intangibles. The summary of changes in goodwill is as follows: 
 
Title
 
Ancillary
Services and Corporate
 
Total
 
($000 omitted)
Balances at January 1, 2016
211,255

 
6,467

 
217,722

Acquisitions
300

 

 
300

Disposals
(190
)
 
(738
)
 
(928
)
Balances at December 31, 2016
211,365

 
5,729

 
217,094

Acquisitions
14,419

 

 
14,419

Disposals
(85
)
 

 
(85
)
Balances at December 31, 2017
225,699

 
5,729

 
231,428



The Company evaluates goodwill for impairment annually based on information as of June 30 of the current year or more frequently if circumstances suggest that impairment may exist. In 2017 and 2016, the Company determined that it was more likely than not that goodwill related to all of its reporting units was not impaired. For its impairment analysis, the Company performed a qualitative assessment in 2017 and utilized a quantitative analysis in 2016.

During 2017, the Company acquired certain title businesses primarily funded by borrowings on the Company's unsecured line of credit. As a result of these acquisitions, the Company increased its goodwill related to the title segment by a total of $14.4 million, which is deductible in full for income tax purposes over a period of 15 years. Also, in connection with the acquisitions, the Company identified and recorded $2.6 million of other intangibles, primarily related to acquired software to be amortized over 5 years from the date of acquisition.

The gross carrying amount, and accumulated amortization and impairment of other intangibles was $30.5 million and $20.8 million, respectively, at December 31, 2017 and $27.9 million and $17.0 million, respectively, at December 31, 2016. During 2016, other intangible assets with total gross carrying amounts and accumulated amortization and impairment of $11.2 million and $9.1 million, respectively, were written off as part of the sale of certain businesses within the Company's ancillary services operations.

The amortization expense recorded for the Company's other intangible assets was $3.8 million and $5.5 million in 2017 and 2016, respectively. The annual amortization expense expected to be recognized in the next five years is approximately $3.4 million in 2018, $2.5 million in 2019, $1.5 million in 2020, $0.9 million in 2021 and $0.4 million in 2022.