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Goodwill and Intangible Assets (Tables) | 12 Months Ended
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Dec. 31, 2016
Goodwill and Intangible Assets Disclosure [Abstract] |
Goodwill by Operating Segment | Changes in goodwill for the years ended December 31, 2016 and 2015 are as follows (in thousands):
| Supply Chain Management |  | IT, Energy and Management Consulting |  | Aviation |  | Total
Balance as of December 31, 2014 | $ | 61,169 |  |  | $ | 30,883 |  |  | $ | — |  |  | $ | 92,052 |
Increase from acquisitions | 1,944 |  |  | — |  |  | 104,549 |  |  | 106,493 |
Balance as of December 31, 2015 | $ | 63,113 |  |  | $ | 30,883 |  |  | $ | 104,549 |  |  | $ | 198,545 |
Increase from acquisitions | 77 |  |  | — |  |  | — |  |  | 77 |
Balance as of December 31, 2016 | $ | 63,190 |  |  | $ | 30,883 |  |  | $ | 104,549 |  |  | $ | 198,622 |
Intangible Assets | Intangible assets were composed of the following (in thousands):
| Cost |  | Accumulated Amortization |  | Accumulated Impairment Loss |  | Net Intangible Assets
December 31, 2016 |  |  |  |  |  |  |
Contract and customer-related | $ | 173,094 |  |  | $ | (59,799 | ) |  | $ | (1,025 | ) |  | $ | 112,270 |
Acquired technologies | 12,400 |  |  | (6,278 | ) |  | — |  |  | 6,122 |
Trade names | 16,670 |  |  | (8,136 | ) |  | — |  |  | 8,534 |
Total | $ | 202,164 |  |  | $ | (74,213 | ) |  | $ | (1,025 | ) |  | $ | 126,926 |
December 31, 2015 |  |  |  |  |  |  |  |  |  |  |
Contract and customer-related | $ | 173,084 |  |  | $ | (46,611 | ) |  | $ | (1,025 | ) |  | $ | 125,448 |
Acquired technologies | 12,400 |  |  | (5,151 | ) |  | — |  |  | 7,249 |
Trade names | 16,730 |  |  | (6,384 | ) |  | — |  |  | 10,346 |
Total | $ | 202,214 |  |  | $ | (58,146 | ) |  | $ | (1,025 | ) |  | $ | 143,043 |
Future Amortization of Intangible Assets | Future expected amortization of intangible assets is as follows for the years ending December 31, (in thousands):
| Amortization
2017 | $ | 16,017 |
2018 | 16,017 |
2019 | 15,953 |
2020 | 15,362 |
2021 | 14,998 |
Thereafter | 48,579 |
Total | $ | 126,926 |

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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=66006027&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=66006027&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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- Definition Tabular disclosure of the amount of amortization expense expected to be recorded in succeeding fiscal years for finite-lived intangible assets. + 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=66006027&loc=d3e16323-109275 + Details
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