Consolidated Statements of Operations - USD ($) shares in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Statement [Abstract]
Operating revenue	$ 1,851,117,000	$ 1,952,557,000	$ 1,528,110,000
Cost of services (exclusive of depreciation and amortization)	974,851,000	1,043,937,000	776,509,000
Selling, general and administrative expenses	459,842,000	458,102,000	397,775,000
Depreciation and amortization	177,806,000	172,578,000	150,377,000
Total operating expenses	1,612,499,000	1,674,617,000	1,324,661,000
Operating income	238,618,000	277,940,000	203,449,000
Interest expense:
Interest income	1,532,000	3,052,000	4,021,000
Interest expense	63,356,000	63,392,000	66,486,000
Total interest expense, net	(61,824,000)	(60,340,000)	(62,465,000)
Loss on early extinguishment of debt	(1,775,000)	(26,624,000)	(1,589,000)
Tax indemnification release	0	(23,350,000)	0
Impairment loss on investment in affiliates	(3,811,000)	(23,431,000)	0
(Loss)/gain on investments and other, net	(2,316,000)	19,779,000	33,831,000
Income from continuing operations before equity in (losses)/earnings of affiliates and income taxes	168,892,000	163,974,000	173,226,000
Provision for income taxes	18,172,000	54,524,000	57,394,000
Income from continuing operations before equity in (losses)/earnings of affiliates	150,720,000	109,450,000	115,832,000
Equity in (losses)/earnings of affiliates, net of tax	(1,186,000)	496,000	13,720,000
Net income from continuing operations	149,534,000	109,946,000	129,552,000
Income/(loss) from discontinued operations, net of tax	2,315,000	(1,466,000)	(556,000)
Gain/(loss) from sale of discontinued operations, net of tax	313,000	(1,930,000)	0
Net income	152,162,000	106,550,000	128,996,000
Less: Net income attributable to noncontrolling interests	0	0	1,152,000
Net income attributable to CoreLogic	152,162,000	106,550,000	127,844,000
Amounts attributable to CoreLogic:
Net income from continuing operations	149,534,000	109,946,000	128,400,000
Income/(loss) from discontinued operations, net of tax	2,315,000	(1,466,000)	(556,000)
Gain/(loss) from sale of discontinued operations, net of tax	313,000	(1,930,000)	0
Net income attributable to CoreLogic	$ 152,162,000	$ 106,550,000	$ 127,844,000
Basic income/(loss) per share:
Net income from continuing operations (usd per share)	$ 1.79	$ 1.26	$ 1.44
Gain/(loss) from discontinued operations, net of tax (usd per share)	0.03	(0.02)	(0.01)
Gain/(loss) from sale of discontinued operations, net of tax (usd per share)	0.00	(0.02)	0.00
Net income attributable to CoreLogic (usd per share)	1.82	1.22	1.43
Diluted income/(loss) per share:
Net income from continuing operations (usd per share)	1.75	1.23	1.42
Gain/(loss) from discontinued operations, net of tax (usd per share)	0.03	(0.02)	(0.01)
Gain/(loss) from sale of discontinued operations, net of tax (usd per share)	0.00	(0.02)	0.00
Net income attributable to CoreLogic (usd per share)	$ 1.78	$ 1.19	$ 1.41
Weighted-average common shares outstanding:
Basic (in shares)	83,499	87,502	89,070
Diluted (in shares)	85,234	89,122	90,564