Earnings/(Loss) Per Share (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
Numerator for basic and diluted net income/(loss) per share:
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/(loss) from sale of discontinued operations, net of tax									313	(1,930)	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
Denominator (in shares):
Weighted-average shares for basic income/(loss) per share	81,656	83,362	84,548	84,432	85,534	87,584	88,572	88,310	83,499	87,502	89,070
Dilutive effect of stock options and restricted stock units									1,735	1,620	1,494
Weighted-average shares for diluted income/(loss) per share	83,539	85,090	86,097	86,341	87,289	89,188	89,968	89,919	85,234	89,122	90,564
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
Stock options excluded from weighted average diluted shares outstanding (less than)									100	100	100