Consolidated Statements of Comprehensive Income - USD ($) shares in Thousands, $ in Thousands		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Revenue:
Total revenue		$ 717,945	$ 560,456	$ 509,557
Cost of revenue:
Amortization of acquired technology		0	99	195
Total cost of revenue		362,772	263,719	246,072
Engineering and technology		30,931	19,332	19,614
Sales and marketing		126,205	111,361	102,798
General and administrative		78,529	60,124	52,668
Acquisition and integration		25,763	0	0
Depreciation		5,479	4,468	3,460
Amortization of other acquired intangible assets		37,357	33,487	33,807
Impairment of indefinite-live intangible assets (excluding goodwill)		50,900
Impairment of intangible asset		50,900	0	0
Restructuring		0	288	3,101
Total operating expenses		717,936	492,779	461,520
Operating income		9	67,677	48,037
Other loss, net		(16,915)	(15,797)	(44,551)
Income (loss) before income taxes		(16,906)	51,880	3,486
Income tax benefit (expense)		65,054	(311)	25,890
Net income (loss)		48,148	51,569	29,376
Net income attributable to noncontrolling interests		0	(935)	(2,337)
Net income attributable to Blucora, Inc.		$ 48,148	$ 50,634	$ 27,039
Net income (loss) per share attributable to Blucora, Inc.:
Basic net income (loss) per share (in USD per share)	[1]	$ 1.00	$ 0.94	$ 0.61
Diluted net income (loss) per share (in USD per share)	[1]	$ 0.98	$ 0.90	$ 0.57
Weighted average shares outstanding:
Basic (in shares)	[1]	48,264	47,394	44,370
Diluted (in shares)	[1]	49,282	49,381	47,211
Comprehensive income (loss):
Net income		$ 48,148	$ 51,569	$ 29,376
Other comprehensive income (loss)		174	(442)	377
Comprehensive income		48,322	51,127	29,753
Comprehensive income attributable to noncontrolling interests		0	(935)	(2,337)
Comprehensive income attributable to Blucora, Inc.		48,322	50,192	27,416
Wealth management services
Revenue:
Total revenue		507,979	373,174	348,620
Cost of revenue:
Cost of revenue		352,081	253,580	235,859
Tax preparation services
Revenue:
Total revenue		209,966	187,282	160,937
Cost of revenue:
Cost of revenue		$ 10,691	$ 10,040	$ 10,018

[1] Net income per share for the year ended December 31, 2018 included the noncontrolling interest redemption impact discussed further in “Note 2—Summary of Significant Accounting Policies” and in “Note 17—Net Income Per Share.”