v3.19.3.a.u2

Goodwill and Amortizable Intangible Assets - Amortizable Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Goodwill and Amortizable Intangible Assets
Gross Carrying Amount	$ 447,276	$ 192,425
Accumulated Amortization	(114,201)	(55,820)
Net Carrying Amount	$ 333,075	136,605
Minimum
Goodwill and Amortizable Intangible Assets
Estimated Average Useful Life (in years)	3 years
Maximum
Goodwill and Amortizable Intangible Assets
Estimated Average Useful Life (in years)	10 years
Capitalized technology
Goodwill and Amortizable Intangible Assets
Gross Carrying Amount	$ 142,712	68,291
Accumulated Amortization	(41,106)	(16,945)
Net Carrying Amount	$ 101,606	51,346
Capitalized technology | Minimum
Goodwill and Amortizable Intangible Assets
Estimated Average Useful Life (in years)	3 years
Capitalized technology | Maximum
Goodwill and Amortizable Intangible Assets
Estimated Average Useful Life (in years)	5 years
Capitalized content development
Goodwill and Amortizable Intangible Assets
Gross Carrying Amount	$ 167,758	79,725
Accumulated Amortization	(54,736)	(31,662)
Net Carrying Amount	$ 113,022	48,063
Capitalized content development | Minimum
Goodwill and Amortizable Intangible Assets
Estimated Average Useful Life (in years)	4 years
Capitalized content development | Maximum
Goodwill and Amortizable Intangible Assets
Estimated Average Useful Life (in years)	5 years
University client relationships
Goodwill and Amortizable Intangible Assets
Gross Carrying Amount	$ 110,344	25,616
Accumulated Amortization	(12,419)	(4,269)
Net Carrying Amount	$ 97,925	21,347
University client relationships | Minimum
Goodwill and Amortizable Intangible Assets
Estimated Average Useful Life (in years)	9 years
University client relationships | Maximum
Goodwill and Amortizable Intangible Assets
Estimated Average Useful Life (in years)	10 years
Trade names and domain names
Goodwill and Amortizable Intangible Assets
Gross Carrying Amount	$ 26,462	18,793
Accumulated Amortization	(5,940)	(2,944)
Net Carrying Amount	$ 20,522	15,849
Trade names and domain names | Minimum
Goodwill and Amortizable Intangible Assets
Estimated Average Useful Life (in years)	8 years
Trade names and domain names | Maximum
Goodwill and Amortizable Intangible Assets
Estimated Average Useful Life (in years)	10 years
In process capitalized technology and content development
Goodwill and Amortizable Intangible Assets
Net Carrying Amount	$ 30,700	$ 40,300

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+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
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+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 928
-SubTopic 340
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6473545&loc=d3e61844-108004

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+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
-Topic 350
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