Earnings/(Loss) Per Share (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Numerator for basic and diluted net income/(loss) per share:
Income from continuing operations, net of tax	$ 17,035	$ 36,213	$ 41,208	$ 29,052	$ (6,161)	$ (2,970)	$ 40,041	$ 21,605	$ 123,508	$ 52,515	$ 46,221
Loss from discontinued operations, net of tax	3,085	(10,157)	983	(8,967)	(15,999)	(104,220)	(8,556)	1,651	(15,056)	(127,124)	(83,536)
Gain/(loss) from sale of discontinued operations, net of tax	(5,435)	12,264	466	(3,454)					3,841	0	(18,985)
Net income/(loss) attributable to CoreLogic	$ 14,685	$ 38,320	$ 42,657	$ 16,631	$ (22,160)	$ (107,190)	$ 31,485	$ 23,256	$ 112,293	$ (74,609)	$ (56,300)
Denominator:
Weighted-average shares for basic income/(loss) per share	97,513	101,650	105,895	106,594	106,508	106,414	108,018	115,545	102,913	109,122	111,529
Dilutive effect of stock options and restricted stock units									1,137	590	834
Weighted-average shares for diluted income/(loss) per share	99,346	103,113	106,468	107,327	106,508	106,414	108,641	116,306	104,050	109,712	112,363
Earnings Per Share, Basic
Income from continuing operations, net of tax	$ 0.17	$ 0.36	$ 0.39	$ 0.27	$ (0.06)	$ (0.03)	$ 0.37	$ 0.19	$ 1.20	$ 0.48	$ 0.41
Loss from discontinued operations, net of tax	$ 0.03	$ (0.10)	$ 0.01	$ (0.08)	$ (0.15)	$ (0.98)	$ (0.08)	$ 0.01	$ (0.15)	$ (1.16)	$ (0.75)
Gain/(loss) from sale of discontinued operations, net of tax (in dollars per share)	$ (0.06)	$ 0.12	$ 0.00	$ (0.03)					$ 0.04	$ 0.00	$ (0.17)
Net income/(loss) attributable to CoreLogic	$ 0.14	$ 0.38	$ 0.40	$ 0.16	$ (0.21)	$ (1.01)	$ 0.29	$ 0.20	$ 1.09	$ (0.68)	$ (0.51)
Earnings Per Share, Diluted
Income from continuing operations, net of tax (in dollars per share)	$ 0.17	$ 0.35	$ 0.39	$ 0.27	$ (0.06)	$ (0.03)	$ 0.37	$ 0.19	$ 1.19	$ 0.48	$ 0.41
Loss from discontinued operations, net of tax	$ 0.03	$ (0.10)	$ 0.01	$ (0.08)	$ (0.15)	$ (0.98)	$ (0.08)	$ 0.01	$ (0.14)	$ (1.16)	$ (0.74)
Gain/(loss) from sale of discontinued operations, net of tax (in dollars per share)	$ (0.05)	$ 0.12	$ 0.00	$ (0.03)					$ 0.04	$ 0.00	$ (0.17)
Net income/(loss) attributable to CoreLogic	$ 0.15	$ 0.37	$ 0.40	$ 0.16	$ (0.21)	$ (1.01)	$ 0.29	$ 0.20	$ 1.09	$ (0.68)	$ (0.50)