Guarantor Subsidiaries (Income Statement) (Details) (USD $) In Thousands, 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
Operating revenue	$ 410,411	$ 409,760	$ 389,361	$ 358,101	$ 345,398	$ 348,446	$ 328,421	$ 316,282	$ 1,567,633	$ 1,338,547	$ 1,280,276
Intercompany revenue									0	0	0
Cost of services (exclusive of depreciation and amortization below)									839,593	749,064	683,883
Selling, general and administrative expenses									372,066	385,252	387,829
Depreciation and amortization									133,714	115,546	94,881
Operating (loss)/income	48,089	61,382	67,562	45,227	15,436	27,840	18,833	26,576	222,260	88,685	113,683
Total interest expense, net									(52,468)	(58,290)	(30,225)
Gain/(loss) on investments and other, net									(2,516)	60,005	(10,885)
(Benefit)/Provision for income taxes									80,396	67,175	30,323
Equity in earnings of affiliates, net of tax	6,602	8,166	11,745	9,470	9,877	8,340	5,719	6,334	35,983	30,270	41,641
Equity in (losses)/earnings of subsidiary, net of tax									0	0	0
Net income from continuing operations									122,863	53,495	83,891
Loss from discontinued operations, net of tax									(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 (loss)/income									111,648	(73,629)	(18,630)
Less: Net (loss)/income attributable to noncontrolling interests									(645)	980	37,670
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)
Net income/(loss)									111,648	(73,629)	(18,630)
Total other comprehensive income/(loss)									4,802	(36,259)	12,831
Less: Comprehensive/(loss) income attributable to the noncontrolling interests									(645)	980	37,653
Comprehensive (loss)/income attributable to CoreLogic									117,095	(110,868)	(43,452)
Parent [Member]
Operating revenue									0	0	0
Intercompany revenue									0	0	0
Cost of services (exclusive of depreciation and amortization below)									0	0	0
Selling, general and administrative expenses									65,636	97,780	72,943
Depreciation and amortization									2,937	3,702	5,093
Operating (loss)/income									(68,573)	(101,482)	(78,036)
Total interest expense, net									(50,222)	(55,564)	(30,279)
Gain/(loss) on investments and other, net									3,492	64,984	(13,852)
(Benefit)/Provision for income taxes									(44,909)	(65,471)	(55,145)
Equity in earnings of affiliates, net of tax									0	0	(29)
Equity in (losses)/earnings of subsidiary, net of tax									182,687	(48,018)	10,751
Net income from continuing operations									112,293	(74,609)	(56,300)
Loss from discontinued operations, net of tax									0	0	0
Gain/(loss) from sale of discontinued operations, net of tax									0		0
Net (loss)/income									112,293	(74,609)	(56,300)
Less: Net (loss)/income attributable to noncontrolling interests									0	0	0
Net income/(loss) attributable to CoreLogic									112,293	(74,609)	(56,300)
Net income/(loss)									112,293	(74,609)	(56,300)
Total other comprehensive income/(loss)									4,802	(36,259)	12,848
Less: Comprehensive/(loss) income attributable to the noncontrolling interests									0	0	0
Comprehensive (loss)/income attributable to CoreLogic									117,095	(110,868)	(43,452)
Guarantor Subsidiaries [Member]
Operating revenue									1,477,258	1,275,977	1,276,089
Intercompany revenue									0	0	0
Cost of services (exclusive of depreciation and amortization below)									805,767	725,006	689,473
Selling, general and administrative expenses									272,074	266,978	315,582
Depreciation and amortization									104,571	92,046	86,960
Operating (loss)/income									294,846	191,947	184,074
Total interest expense, net									140	(978)	(650)
Gain/(loss) on investments and other, net									(7,314)	(5,061)	(1,828)
(Benefit)/Provision for income taxes									120,366	133,017	81,971
Equity in earnings of affiliates, net of tax									35,153	30,078	41,670
Equity in (losses)/earnings of subsidiary, net of tax									0	0	0
Net income from continuing operations									202,459	82,969	141,295
Loss from discontinued operations, net of tax									(15,056)	(127,124)	18,517
Gain/(loss) from sale of discontinued operations, net of tax									3,841		0
Net (loss)/income									191,244	(44,155)	159,812
Less: Net (loss)/income attributable to noncontrolling interests									0	0	37,627
Net income/(loss) attributable to CoreLogic									191,244	(44,155)	122,185
Net income/(loss)									191,244	(44,155)	159,812
Total other comprehensive income/(loss)									0	(14,093)	1,759
Less: Comprehensive/(loss) income attributable to the noncontrolling interests									0	0	37,610
Comprehensive (loss)/income attributable to CoreLogic									191,244	(58,248)	123,961
Non-Guarantor Subsidiaries [Member]
Operating revenue									90,375	62,570	4,187
Intercompany revenue									1,955	45,678	56,474
Cost of services (exclusive of depreciation and amortization below)									35,781	67,309	48,150
Selling, general and administrative expenses									34,356	22,921	2,038
Depreciation and amortization									26,206	19,798	2,828
Operating (loss)/income									(4,013)	(1,780)	7,645
Total interest expense, net									(2,386)	(1,748)	704
Gain/(loss) on investments and other, net									1,306	82	4,795
(Benefit)/Provision for income taxes									4,939	(371)	3,497
Equity in earnings of affiliates, net of tax									830	192	0
Equity in (losses)/earnings of subsidiary, net of tax									0	0	0
Net income from continuing operations									(9,202)	(2,883)	9,647
Loss from discontinued operations, net of tax									0	0	(102,053)
Gain/(loss) from sale of discontinued operations, net of tax									0		(18,985)
Net (loss)/income									(9,202)	(2,883)	(111,391)
Less: Net (loss)/income attributable to noncontrolling interests									(645)	980	43
Net income/(loss) attributable to CoreLogic									(8,557)	(3,863)	(111,434)
Net income/(loss)									(9,202)	(2,883)	(111,391)
Total other comprehensive income/(loss)									5,920	(12,612)	(547)
Less: Comprehensive/(loss) income attributable to the noncontrolling interests									(645)	980	43
Comprehensive (loss)/income attributable to CoreLogic									(2,637)	(16,475)	(111,981)
Consolidating/Eliminating Adjustments [Member]
Operating revenue									0	0	0
Intercompany revenue									(1,955)	(45,678)	(56,474)
Cost of services (exclusive of depreciation and amortization below)									(1,955)	(43,251)	(53,740)
Selling, general and administrative expenses									0	(2,427)	(2,734)
Depreciation and amortization									0	0	0
Operating (loss)/income									0	0	0
Total interest expense, net									0	0	0
Gain/(loss) on investments and other, net									0	0	0
(Benefit)/Provision for income taxes									0	0	0
Equity in earnings of affiliates, net of tax									0	0	0
Equity in (losses)/earnings of subsidiary, net of tax									(182,687)	48,018	(10,751)
Net income from continuing operations									(182,687)	48,018	(10,751)
Loss from discontinued operations, net of tax									0	0	0
Gain/(loss) from sale of discontinued operations, net of tax									0		0
Net (loss)/income									(182,687)	48,018	(10,751)
Less: Net (loss)/income attributable to noncontrolling interests									0	0	0
Net income/(loss) attributable to CoreLogic									(182,687)	48,018	(10,751)
Net income/(loss)									(182,687)	48,018	(10,751)
Total other comprehensive income/(loss)									(5,920)	26,705	(1,229)
Less: Comprehensive/(loss) income attributable to the noncontrolling interests									0	0	0
Comprehensive (loss)/income attributable to CoreLogic									$ (188,607)	$ 74,723	$ (11,980)