Guarantor Subsidiaries Income Statement (Details) (USD $) In Thousands, 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
External cost of revenues									288,056	282,824	290,074
Salaries and benefits									553,898	533,268	565,917
Other operating expenses									292,362	255,620	251,145
Depreciation and amortization									115,546	94,881	114,374
Income from continuing operations	15,436	27,840	18,833	26,576	33,199	45,692	21,624	13,168	88,685	113,683	108,652
Total interest expenses, net									(58,290)	(30,225)	(30,846)
(Loss)/gain on investment and other, net									60,005	(10,885)	(5,933)
Provision/(benefit) for income taxes									67,175	30,323	17,101
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
Equity in earnings of subsidiary, net of tax									0	0	0
Net income from continuing operations									53,495	83,891	103,619
(Loss) income from discontinued operations, net of tax									(127,124)	(83,536)	150,658
Loss on sale of discontinued operations, net of tax									0	(18,985)	0
Net (loss) income									(73,629)	(18,630)	254,277
Less: Net income attributable to noncontrolling interests									980	37,670	57,638
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
Parent Company [Member]
Operating revenue									0	0	0
External cost of revenues									0	0	0
Salaries and benefits									74,968	56,723	46,684
Other operating expenses									21,714	17,060	(22,361)
Depreciation and amortization									3,702	5,093	4,320
Income from continuing operations									(100,384)	(78,876)	(28,643)
Total interest expenses, net									(55,564)	(30,279)	(33,797)
(Loss)/gain on investment and other, net									64,984	(13,852)	0
Provision/(benefit) for income taxes									(65,471)	(55,525)	(14,822)
Equity in earnings of affiliates, net of tax									0	(29)	(740)
Equity in earnings of subsidiary, net of tax									(48,136)	48,882	302,633
Net income from continuing operations									(73,629)	(18,629)	254,275
(Loss) income from discontinued operations, net of tax									0	0	0
Loss on sale of discontinued operations, net of tax									0	0
Net (loss) income									(73,629)	(18,629)	254,275
Less: Net income attributable to noncontrolling interests									980	37,670	57,638
Net (loss) income attributable to CoreLogic									(74,609)	(56,299)	196,637
Guarantor Subsidiaries [Member]
Operating revenue									1,230,299	1,219,615	1,263,321
External cost of revenues									280,509	281,564	289,687
Salaries and benefits									421,480	437,164	474,314
Other operating expenses									245,414	229,014	262,562
Depreciation and amortization									92,046	86,960	106,363
Income from continuing operations									190,850	184,913	130,395
Total interest expenses, net									(978)	(650)	2,726
(Loss)/gain on investment and other, net									(5,061)	(1,828)	(5,933)
Provision/(benefit) for income taxes									133,017	82,351	30,191
Equity in earnings of affiliates, net of tax									30,078	41,670	49,587
Equity in earnings of subsidiary, net of tax									0	0	0
Net income from continuing operations									81,872	141,754	146,584
(Loss) income from discontinued operations, net of tax									(127,124)	18,517	14,172
Loss on sale of discontinued operations, net of tax									0	0
Net (loss) income									(45,252)	160,271	160,756
Less: Net income attributable to noncontrolling interests									0	0	0
Net (loss) income attributable to CoreLogic									(45,252)	160,271	160,756
Non-Guarantor Subsidiaries [Member]
Operating revenue									108,248	60,661	66,841
External cost of revenues									7,547	1,260	387
Salaries and benefits									57,450	39,381	44,919
Other operating expenses									25,234	9,546	10,944
Depreciation and amortization									19,798	2,828	3,691
Income from continuing operations									(1,781)	7,646	6,900
Total interest expenses, net									(1,748)	704	225
(Loss)/gain on investment and other, net									82	4,795	0
Provision/(benefit) for income taxes									(371)	3,497	1,732
Equity in earnings of affiliates, net of tax									192	0	0
Equity in earnings of subsidiary, net of tax									0	0	0
Net income from continuing operations									(2,884)	9,648	5,393
(Loss) income from discontinued operations, net of tax									0	(102,053)	136,486
Loss on sale of discontinued operations, net of tax									0	(18,985)
Net (loss) income									(2,884)	(111,390)	141,879
Less: Net income attributable to noncontrolling interests									0	0	0
Net (loss) income attributable to CoreLogic									(2,884)	(111,390)	141,879
Consolidation, Eliminations [Member]
Operating revenue									0	0	0
External cost of revenues									0	0	0
Salaries and benefits									0	0	0
Other operating expenses									0	0	0
Depreciation and amortization									0	0	0
Income from continuing operations									0	0	0
Total interest expenses, net									0	0	0
(Loss)/gain on investment and other, net									0	0	0
Provision/(benefit) for income taxes									0	0	0
Equity in earnings of affiliates, net of tax									0	0	0
Equity in earnings of subsidiary, net of tax									48,136	(48,882)	(302,633)
Net income from continuing operations									48,136	(48,882)	(302,633)
(Loss) income from discontinued operations, net of tax									0	0	0
Loss on sale of discontinued operations, net of tax									0	0
Net (loss) income									48,136	(48,882)	(302,633)
Less: Net income attributable to noncontrolling interests									0	0	0
Net (loss) income attributable to CoreLogic									$ 48,136	$ (48,882)	$ (302,633)