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Goodwill and Intangible Assets - Goodwill (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Changes in carrying amount |  |  |
Balance, beginning of period | $ 732,540 | $ 20,744 |
Additions |  | 723,929 |
Impairments | 0 | (13,944) | $ 0
Measurement period adjustment, goodwill | (465) | 1,811 |
Balance, end of period | 732,075 | 732,540 | 20,744
Strayer University |  |  |
Changes in carrying amount |  |  |
Balance, beginning of period | 337,381 | 6,800 |
Additions |  | 330,581 |
Balance, end of period | 337,381 | 337,381 | 6,800
Capella University |  |  |
Changes in carrying amount |  |  |
Balance, beginning of period | 395,159 |  |
Additions |  | 393,348 |
Impairments | 0 |  |
Measurement period adjustment, goodwill | (465) | 1,811 |
Balance, end of period | 394,694 | 395,159 |
JWMI |  |  |
Changes in carrying amount |  |  |
Impairments | 0 |  |
Non-Degree Programs |  |  |
Changes in carrying amount |  |  |
Balance, beginning of period | $ 0 | 13,944 |
Impairments |  | (13,944) |
Measurement period adjustment, goodwill |  | 0 |
Balance, end of period |  | $ 0 | $ 13,944

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- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=77989000&loc=SL49117168-202975 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=99380562&loc=d3e13770-109266 + Details
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- Definition Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=108376223&loc=d3e13816-109267 + Details
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