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Goodwill and Other Intangible Assets (Tables) | 12 Months Ended
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Dec. 31, 2016
Goodwill and Intangible Assets Disclosure [Abstract] |
Summary of Other Intangible Assets and Related Accumulated Amortization | Other intangible assets and related accumulated amortization consists of the following at December 31:
| 2016 |  | 2015
Gross carrying amount of acquisition intangibles: |  |  |
Customer related intangibles | $ | 186,231 |  |  | $ | 181,671 |
Acquired software | 176,096 |  |  | 172,666 |
Trade name | 11,065 |  |  | 10,765 |
Leases acquired | 3,694 |  |  | 3,694 |
| 377,086 |  |  | 368,796 |
Accumulated amortization | (109,827 | ) |  | (73,418 | )
Total intangibles, net | $ | 267,259 |  |  | $ | 295,378 |
Summary of Allocation of Acquisition Intangible Assets | The allocation of acquisition intangible assets is summarized in the following table:
| December 31, 2016 |  | December 31, 2015
| Gross Carrying Amount |  | Weighted Average Amortization Period |  | Accumulated Amortization |  | Gross Carrying Amount |  | Weighted Average Amortization Period |  | Accumulated Amortization
Non-amortizable intangibles: |  |  |  |  |  |  |  |  |  |  |
Goodwill | $ | 650,237 |  |  | — |  |  | $ | — |  |  | $ | 653,666 |  |  | — |  |  | $ | — |
Amortizable intangibles: |  |  |  |  |  |  |  |  |  |  |
Customer related intangibles | 186,231 |  |  | 15 years |  |  | 51,491 |  |  | 181,671 |  |  | 15 years |  |  | 38,754 |
Acquired software | 176,096 |  |  | 7 years |  |  | 55,115 |  |  | 172,666 |  |  | 7 years |  |  | 32,880 |
Trade name | 11,065 |  |  | 12 years |  |  | 2,740 |  |  | 10,765 |  |  | 12 years |  |  | 1,747 |
Leases acquired | 3,694 |  |  | 9 years |  |  | 481 |  |  | 3,694 |  |  | 9 years |  |  | 37 |
Summary of Changes in Carrying Amount of Goodwill | The changes in the carrying amount of goodwill for the two years ended December 31, 2016 are as follows:
| Enterprise Software |  | Appraisal and Tax |  | Total
Balance as of 12/31/2014 | $ | 117,585 |  |  | $ | 6,557 |  |  | $ | 124,142 |
Goodwill acquired during 2015 related to the purchase of NWS | 527,618 |  |  | — |  |  | 527,618 |
Goodwill acquired during 2015 related to the purchase of Brazos | 1,906 |  |  | — |  |  | 1,906 |
Balance as of 12/31/2015 | 647,109 |  |  | 6,557 |  |  | 653,666 |
Goodwill acquired during 2016 related to a small acquisition | 3,943 |  |  | — |  |  | 3,943 |
Purchase price adjustments related to NWS acquisition | (7,372 | ) |  | — |  |  | (7,372 | )
Balance as of 12/31/2016 | $ | 643,680 |  |  | $ | 6,557 |  |  | $ | 650,237 |
Summary of Estimated Annual Amortization Expense | Estimated annual amortization expense relating to acquisition intangibles, including acquired software, for which the amortization expense is recorded as cost of revenues, for the next five years is as follows:
2017 | $ | 35,120 |
2018 | 34,443 |
2019 | 33,107 |
2020 | 31,660 |
2021 | 31,302 |

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- Definition Tabular disclosure of the characteristics, including initial carrying value, residual amount, weighted average useful life, of finite-lived intangible assets acquired during the period by major class. A major class is composed of intangible assets that can be grouped together because they are similar, either by nature or by their use in the operations of the company. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16265-109275 + Details
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- Definition Tabular disclosure of assets, excluding financial assets and goodwill, lacking physical substance with a finite life, by either major class or business segment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16265-109275 + Details
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- Definition Tabular disclosure of goodwill by reportable segment and in total which includes a rollforward schedule. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13854-109267 + Details
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