Guarantor Subsidiaries (Income Statement) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Operating revenues	$ 409,760	$ 348,446	$ 1,157,222	$ 993,149
External cost of revenues	100,769	78,178	274,366	211,457
Salaries and benefits	133,794	131,523	406,045	414,545
Other operating expenses	80,778	76,061	209,206	209,739
(Loss)/income from continuing operations	61,382	27,840	174,171	73,248
Total interest expense, net	(12,725)	(14,419)	(40,201)	(43,778)
Gain/(loss) on investment and other, net	(4,254)	(4,118)	(3,865)	86,783
(Benefit)/provision for income taxes	16,406	20,535	53,222	76,829
Equity in earnings of affiliates, net of tax	8,166	8,340	29,381	20,393
Net income/(loss) from continuing operations	36,163	(2,892)	106,264	59,817
Loss from discontinued operations, net of tax	(10,157)	(104,220)	(18,142)	(111,125)
Gain on sale of discontinued operations, net of tax	12,264	0	9,277	0
Net income/(loss)	38,270	(107,112)	97,399	(51,308)
Less: Net loss attributable to noncontrolling interests	(50)	78	(209)	1,142
Net income/(loss) attributable to CoreLogic	38,320	(107,190)	97,608	(52,450)
Total other comprehensive income/(loss)	4,264	(31,721)	5,637	(48,327)
Comprehensive income/(loss) attributable to CoreLogic	42,584	(138,911)	103,245	(100,777)
Parent [Member]
Operating revenues	0	0	0	0
External cost of revenues	0	0	0	0
Salaries and benefits	21,143	13,444	62,576	53,803
Other operating expenses	(3,684)	1,228	(13,948)	5,869
Depreciation and amortization	610	920	2,137	2,778
(Loss)/income from continuing operations	(18,069)	(15,592)	(50,765)	(62,450)
Total interest expense, net	(12,035)	(13,288)	(38,034)	(42,721)
Gain/(loss) on investment and other, net	1,111	(3,297)	2,456	63,362
(Benefit)/provision for income taxes	(10,228)	24,722	(31,698)	19,990
Equity in earnings of affiliates, net of tax	0	0	0	0
Equity in earnings of subsidiary, net of tax	57,085	(50,291)	152,253	9,839
Net income/(loss) from continuing operations	38,320	(107,190)	97,608	(51,960)
Loss from discontinued operations, net of tax	0	0	0	0
Gain on sale of discontinued operations, net of tax	0		0
Net income/(loss)	38,320	(107,190)	97,608	(51,960)
Less: Net loss attributable to noncontrolling interests	0	0	0	490
Net income/(loss) attributable to CoreLogic	38,320	(107,190)	97,608	(52,450)
Total other comprehensive income/(loss)	4,264	(31,721)	5,637	(48,327)
Comprehensive income/(loss) attributable to CoreLogic	42,584	(138,911)	103,245	(100,777)
Guarantor Subsidiaries [Member]
Operating revenues	386,033	316,415	1,088,836	907,207
External cost of revenues	97,213	75,906	264,281	207,435
Salaries and benefits	101,266	101,679	308,436	313,907
Other operating expenses	81,707	62,662	214,722	182,087
Depreciation and amortization	26,755	24,482	73,582	67,985
(Loss)/income from continuing operations	79,092	51,686	227,815	135,793
Total interest expense, net	(28)	(193)	159	(152)
Gain/(loss) on investment and other, net	(5,598)	(821)	(7,144)	23,339
(Benefit)/provision for income taxes	24,898	(4,508)	81,263	54,385
Equity in earnings of affiliates, net of tax	7,919	8,284	28,490	20,337
Equity in earnings of subsidiary, net of tax	0	0	0	0
Net income/(loss) from continuing operations	56,487	63,464	168,057	124,932
Loss from discontinued operations, net of tax	(10,157)	(104,220)	(18,142)	(111,125)
Gain on sale of discontinued operations, net of tax	12,264		9,277
Net income/(loss)	58,594	(40,756)	159,192	13,807
Less: Net loss attributable to noncontrolling interests	0	0	0	0
Net income/(loss) attributable to CoreLogic	58,594	(40,756)	159,192	13,807
Total other comprehensive income/(loss)	0	(271)	0	(14,244)
Comprehensive income/(loss) attributable to CoreLogic	58,594	(41,027)	159,192	(437)
Non-Guarantor Subsidiaries [Member]
Operating revenues	23,727	32,031	68,386	85,942
External cost of revenues	3,556	2,272	10,085	4,022
Salaries and benefits	11,385	16,400	35,033	46,835
Other operating expenses	2,755	12,171	8,432	21,783
Depreciation and amortization	5,672	9,442	17,715	13,397
(Loss)/income from continuing operations	359	(8,254)	(2,879)	(95)
Total interest expense, net	(662)	(938)	(2,326)	(905)
Gain/(loss) on investment and other, net	233	0	823	82
(Benefit)/provision for income taxes	1,736	321	3,657	2,454
Equity in earnings of affiliates, net of tax	247	56	891	56
Equity in earnings of subsidiary, net of tax	0	0	0	0
Net income/(loss) from continuing operations	(1,559)	(9,457)	(7,148)	(3,316)
Loss from discontinued operations, net of tax	0	0	0	0
Gain on sale of discontinued operations, net of tax	0		0
Net income/(loss)	(1,559)	(9,457)	(7,148)	(3,316)
Less: Net loss attributable to noncontrolling interests	(50)	78	(209)	652
Net income/(loss) attributable to CoreLogic	(1,509)	(9,535)	(6,939)	(3,968)
Total other comprehensive income/(loss)	5,163	(27,789)	6,178	(26,498)
Comprehensive income/(loss) attributable to CoreLogic	3,654	(37,324)	(761)	(30,466)
Consolidation, Eliminations [Member]
Operating revenues	0	0	0	0
External cost of revenues	0	0	0	0
Salaries and benefits	0	0	0	0
Other operating expenses	0	0	0	0
Depreciation and amortization	0	0	0	0
(Loss)/income from continuing operations	0	0	0	0
Total interest expense, net	0	0	0	0
Gain/(loss) on investment and other, net	0	0	0	0
(Benefit)/provision for income taxes	0	0	0	0
Equity in earnings of affiliates, net of tax	0	0	0	0
Equity in earnings of subsidiary, net of tax	(57,085)	50,291	(152,253)	(9,839)
Net income/(loss) from continuing operations	(57,085)	50,291	(152,253)	(9,839)
Loss from discontinued operations, net of tax	0	0	0	0
Gain on sale of discontinued operations, net of tax	0		0
Net income/(loss)	(57,085)	50,291	(152,253)	(9,839)
Less: Net loss attributable to noncontrolling interests	0	0	0	0
Net income/(loss) attributable to CoreLogic	(57,085)	50,291	(152,253)	(9,839)
Total other comprehensive income/(loss)	(5,163)	28,060	(6,178)	40,742
Comprehensive income/(loss) attributable to CoreLogic	(62,248)	78,351	(158,431)	30,903
Total [Member]
Operating revenues	409,760	348,446	1,157,222	993,149
External cost of revenues	100,769	78,178	274,366	211,457
Salaries and benefits	133,794	131,523	406,045	414,545
Other operating expenses	80,778	76,061	209,206	209,739
Depreciation and amortization	33,037	34,844	93,434	84,160
(Loss)/income from continuing operations	61,382	27,840	174,171	73,248
Total interest expense, net	(12,725)	(14,419)	(40,201)	(43,778)
Gain/(loss) on investment and other, net	(4,254)	(4,118)	(3,865)	86,783
(Benefit)/provision for income taxes	16,406	20,535	53,222	76,829
Equity in earnings of affiliates, net of tax	8,166	8,340	29,381	20,393
Equity in earnings of subsidiary, net of tax	0	0	0	0
Net income/(loss) from continuing operations	36,163	(2,892)	106,264	59,817
Loss from discontinued operations, net of tax	(10,157)	(104,220)	(18,142)	(111,125)
Gain on sale of discontinued operations, net of tax	12,264		9,277
Net income/(loss)	38,270	(107,112)	97,399	(51,308)
Less: Net loss attributable to noncontrolling interests	(50)	78	(209)	1,142
Net income/(loss) attributable to CoreLogic	38,320	(107,190)	97,608	(52,450)
Total other comprehensive income/(loss)	4,264	(31,721)	5,637	(48,327)
Comprehensive income/(loss) attributable to CoreLogic	$ 42,584	$ (138,911)	$ 103,245	$ (100,777)