Unaudited Quarterly Financial Data (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Quarterly Financial Information Disclosure [Abstract]
Operating revenue	$ 454,157	$ 483,131	$ 473,978	$ 439,851	$ 474,914	$ 523,896	$ 500,204	$ 453,543	$ 1,851,117	$ 1,952,557	$ 1,528,110
Operating income	65,366	62,296	78,393	32,563	57,596	85,721	76,398	58,225	238,618	277,940	203,449
Equity in earnings/(loss) of affiliates, net of tax	46	(229)	(280)	(723)	(99)	607	78	(90)	(1,186)	496	13,720
Net income from continuing operations	64,816	30,828	41,182	12,708	5,982	36,002	40,424	27,538	149,534	109,946	128,400
Income/(loss) from discontinued operations, net of tax	(106)	(74)	78	2,417	(468)	(936)	(4)	(58)	2,315	(1,466)	(556)
Gain from sale of discontinued operations, net of tax	0	0	0	313	(1,930)	0	0	0
Net income attributable to CoreLogic	$ 64,710	$ 30,754	$ 41,260	$ 15,438	$ 3,584	$ 35,066	$ 40,420	$ 27,480	$ 152,162	$ 106,550	$ 127,844
Earnings Per Share, Basic (usd per share)
Net income from continuing operations (usd per share)	$ 0.79	$ 0.37	$ 0.49	$ 0.15	$ 0.07	$ 0.41	$ 0.46	$ 0.31	$ 1.79	$ 1.26	$ 1.44
Gain/(loss) from discontinued operations, net of tax (usd per share)	0.00	0.00	0.00	0.03	(0.01)	(0.01)	0.00	0.00	0.03	(0.02)	(0.01)
Gain/(loss) from sale of discontinued operations, net of tax (usd per share)	0.00	0.00	0.00	0.00	(0.02)	0.00	0.00	0.00	0.00	(0.02)	0.00
Net income attributable to CoreLogic (usd per share)	0.79	0.37	0.49	0.18	0.04	0.40	0.46	0.31	1.82	1.22	1.43
Earnings Per Share, Diluted (usd per share)
Net income from continuing operations (usd per share)	0.78	0.36	0.48	0.15	0.07	0.40	0.45	0.31	1.75	1.23	1.42
Gain/(loss) from discontinued operations, net of tax (usd per share)	0.00	0.00	0.00	0.03	(0.01)	(0.01)	0.00	0.00	0.03	(0.02)	(0.01)
Gain/(loss) from sale of discontinued operations, net of tax (usd per share)	0.00	0.00	0.00	0.00	(0.02)	0.00	0.00	0.00	0.00	(0.02)	0.00
Net income attributable to CoreLogic (usd per share)	$ 0.78	$ 0.36	$ 0.48	$ 0.18	$ 0.04	$ 0.39	$ 0.45	$ 0.31	$ 1.78	$ 1.19	$ 1.41
Weighted-average common shares outstanding:
Basic (in shares)	81,656	83,362	84,548	84,432	85,534	87,584	88,572	88,310	83,499	87,502	89,070
Diluted (in shares)	83,539	85,090	86,097	86,341	87,289	89,188	89,968	89,919	85,234	89,122	90,564
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Provision for income taxes									$ (18,172)	$ (54,524)	$ (57,394)
Deferred income tax (benefit)									(40,769)	18,213	35,110
Restatement Adjustment [Member]
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Provision for income taxes		$ (3,000)	$ (1,300)		$ (3,100)						$ 9,400	$ (2,000)
Deferred income tax (benefit)									$ (4,300)	$ (3,100)