Unaudited Quarterly Financial Data (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended										12 Months Ended
	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011		Mar. 31, 2011	Dec. 31, 2010	Sep. 30, 2010	Jun. 30, 2010		Mar. 31, 2010	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Operating revenue	$ 345,398	$ 348,446	$ 328,421		$ 316,282	$ 315,367	$ 330,146	$ 326,007		$ 308,756	$ 1,338,547	$ 1,280,276	$ 1,330,162
Income from operations	15,436	27,840	18,833		26,576	33,199	45,692	21,624		13,168	88,685	113,683	108,652
Equity in earnings of affiliates, net of tax	9,877	8,340	5,719		6,334	12,049	13,507	8,562		7,523	30,270	41,641	48,847
Income (loss) from continuing operations attributable to CoreLogic stockholders	(6,161)	(2,970)	40,041		21,605	(7,879)	49,064	(2,594)		7,630	52,515	46,221	45,981
Income (loss) from discontinued operations attributable to CoreLogic stockholders, net of tax	(15,999)	(104,220)	(8,556)	[1]	1,651	10,152	(142,479)	27,004	[2]	21,787	(127,124)	(83,536)	150,658
Loss on sale of discontinued operations, net of tax	0	0	0		0	(18,985)	0	0		0	0	(18,985)	0
Net (loss) income attributable to CoreLogic	(22,160)	(107,190)	31,485		23,256	(16,712)	(93,415)	24,410		29,417	(74,609)	(56,300)	196,639
Earnings Per Share, Basic
Income (loss) from continuing operations attributable to CoreLogic stockholders, net of tax	$ (0.06)	$ (0.03)	$ 0.37		$ 0.19	$ (0.07)	$ 0.42	$ (0.02)		$ 0.07	$ 0.48	$ 0.41	$ 0.49
(Loss) income from discontinued operations attributable to CoreLogic stockholders, net of tax	$ (0.15)	$ (0.98)	$ (0.08)	[1]	$ 0.01	$ 0.09	$ (1.22)	$ 0.25	[2]	$ 0.21	$ (1.16)	$ (0.75)	$ 1.59
Loss on sale of discontinued operations, net of tax	$ 0.00	$ 0.00	$ 0.00		$ 0.00	$ (0.16)	$ 0.00	$ 0.00		$ 0.00	$ 0.00	$ (0.17)	$ 0.00
Net (loss) income attributable to CoreLogic	$ (0.21)	$ (1.01)	$ 0.29		$ 0.20	$ (0.14)	$ (0.80)	$ 0.23		$ 0.28	$ (0.68)	$ (0.51)	$ 2.08
Earnings Per Share, Diluted
Income (loss) from continuing operations attributable to CoreLogic stockholders	$ (0.06)	$ (0.03)	$ 0.37		$ 0.19	$ (0.07)	$ 0.42	$ (0.02)		$ 0.07	$ 0.48	$ 0.41	$ 0.48
(Loss) income from discontinued operations attributable to CoreLogic stockholders, net of tax	$ (0.15)	$ (0.98)	$ (0.08)	[1]	$ 0.01	$ 0.09	$ (1.21)	$ 0.25	[2]	$ 0.21	$ (1.16)	$ (0.74)	$ 1.58
Loss on sale of discontinued operations, net of tax	$ 0.00	$ 0.00	$ 0.00		$ 0.00	$ (0.16)	$ 0.00	$ 0.00		$ 0.00	$ 0.00	$ (0.17)	$ 0.00
Net (loss) income attributable to CoreLogic	$ (0.21)	$ (1.01)	$ 0.29	[1]	$ 0.20	$ (0.14)	$ (0.79)	$ 0.23	[2]	$ 0.28	$ (0.68)	$ (0.50)	$ 2.06
Weighted-average common shares outstanding:
Basic	106,508	106,414	108,018		115,545	116,344	116,991	108,936		103,474	109,122	111,529	94,551
Diluted	106,508	106,414	108,641		116,306	116,344	117,829	108,936		104,752	109,712	112,363	95,478
Restatement Adjustment [Member]
Income (loss) from discontinued operations attributable to CoreLogic stockholders, net of tax			$ 1,800					$ 2,800
Earnings Per Share, Diluted
(Loss) income from discontinued operations attributable to CoreLogic stockholders, net of tax			$ 0.02					$ 0.02

[1] Amounts for the quarter ended June 30, 2011, have been revised to reflect financial statement revisions net of tax of $1.8 million of income, which impacted earnings per share by $0.02 per share on both a basic and diluted basis in the second quarter of 2011.

[2] ) Amounts for the quarter ended June 30, 2010, have been revised to reflect financial statement revisions net of tax of $2.8 million of income, which impacted earnings per share by $0.02 per share on both a basic and diluted basis in the second quarter of 2010.