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Goodwill and Other Intangible Assets | 12 Months Ended
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Dec. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract] |
Goodwill and Intangible Assets Disclosure | GOODWILL AND OTHER INTANGIBLE ASSETS The following table shows the changes in the carrying amount of goodwill for the years ended December 31:
| 2017 |  | 2016
Balance at beginning of year | $ | 476,378 |  |  | $ | 446,284 |
Goodwill acquired | 52,229 |  |  | 41,308 |
Foreign currency translation | 11,231 |  |  | (11,214 | )
Balance at year end | $ | 539,838 |  |  | $ | 476,378 |
Goodwill and indefinite-lived assets are reviewed for impairment on an annual basis in the fourth quarter. The Company completed its impairment review and determined that, through December 31, 2017, there had been no impairment of these assets. The components of other intangible assets as of December 31 are as follows:
| 2017 |  | 2016
| Gross Amount |  | Accumulated Amortization |  | Intangibles, Net |  | Gross Amount |  | Accumulated Amortization |  | Intangibles, Net
Customer relationships | $ | 198,527 |  |  | $ | (41,794 | ) |  | $ | 156,733 |  |  | $ | 147,466 |  |  | $ | (34,672 | ) |  | $ | 112,794 |
Proven technology and patents | 70,311 |  |  | (38,890 | ) |  | 31,421 |  |  | 58,394 |  |  | (35,128 | ) |  | 23,266 |
Tradenames (finite life) | 4,518 |  |  | (2,807 | ) |  | 1,711 |  |  | 4,182 |  |  | (2,514 | ) |  | 1,668 |
Tradenames (indefinite life) | 35,562 |  |  | — |  |  | 35,562 |  |  | 28,272 |  |  | — |  |  | 28,272 |
Other | 3,490 |  |  | (2,199 | ) |  | 1,291 |  |  | 2,871 |  |  | (1,816 | ) |  | 1,055 |
| $ | 312,408 |  |  | $ | (85,690 | ) |  | $ | 226,718 |  |  | $ | 241,185 |  |  | $ | (74,130 | ) |  | $ | 167,055 |
The Company recognized amortization expense associated with the above intangible assets of $11.5 million, $8.3 million, and $6.3 million for the years ended December 31, 2017, 2016, and 2015, respectively. The annual aggregate amortization expense based on the current balance of other intangible assets is estimated at $13.9 million for 2018, $13.4 million for 2019, $13.0 million for 2020, $12.4 million for 2021, and $11.9 million for 2022. The finite-lived intangible assets are amortized on a straight-line basis over periods ranging from 3 to 45 years. The straight-line method of amortization reflects an appropriate allocation of the cost of the intangible assets to earnings in proportion to the amount of economic benefits obtained by the Company in each reporting period. Purchased intangibles amortization was $10.9 million, $7.1 million after tax, $7.4 million, $5.0 million after tax, and $5.7 million, $3.9 million after tax, for the years ended December 31, 2017, 2016, and 2015, respectively. In addition to the above amortization, the Company recorded amortization expense associated with capitalized software of $31.0 million, $27.5 million, and $24.4 million for the years ended December 31, 2017, 2016, and 2015, respectively.

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- Definition The entire disclosure for the aggregate amount of goodwill and a description of intangible assets, which may include (a) for amortizable intangible assets (also referred to as finite-lived intangible assets), the carrying amount, the amount of any significant residual value, and the weighted-average amortization period, (b) for intangible assets not subject to amortization (also referred to as indefinite-lived intangible assets), the carrying amount, and (c) the amount of research and development assets acquired and written off in the period, including the line item in the income statement in which the amounts written off are aggregated, if not readily apparent from the income statement. Also discloses (a) for amortizable intangibles assets in total and by major class, the gross carrying amount and accumulated amortization, the total amortization expense for the period, and the estimated aggregate amortization expense for each of the five succeeding fiscal years, (b) for intangible assets not subject to amortization the carrying amount in total and by major class, and (c) for goodwill, in total and for each reportable segment, the changes in the carrying amount of goodwill during the period (including the aggregate amount of goodwill acquired, the aggregate amount of impairment losses recognized, and the amount of goodwill included in the gain (loss) on disposal of a reporting unit). If any part of goodwill has not been allocated to a reportable segment, discloses the unallocated amount and the reasons for not allocating. For each impairment loss recognized related to an intangible asset (excluding goodwill), discloses: (a) a description of the impaired intangible asset and the facts and circumstances leading to the impairment, (b) the amount of the impairment loss and the method for determining fair value, (c) the caption in the income statement or the statement of activities in which the impairment loss is aggregated, and (d) the segment in which the impaired intangible asset is reported. For each goodwill impairment loss recognized, discloses: (a) a description of the facts and circumstances leading to the impairment, (b) the amount of the impairment loss and the method of determining the fair value of the associated reporting unit, and (c) if a recognized impairment loss is an estimate not finalized and the reasons why the estimate is not final. May also disclose the nature and amount of any significant adjustments made to a previous estimate of an impairment loss. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -URI http://asc.fasb.org/topic&trid=2144416 + Details
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