Guarantor Subsidiaries (Income Statement) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Operating revenues	$ 389,361	$ 328,421	$ 747,462	$ 644,703
External cost of revenues	93,216	69,337	173,597	133,278
Salaries and benefits	134,510	142,027	272,252	283,023
Other operating expenses	63,168	71,946	128,428	133,678
(Loss)/income from continuing operations	67,562	18,833	112,789	45,409
Total interest expense, net	(13,334)	(21,809)	(27,476)	(29,359)
(Loss)/gain on investment and other, net	(1,252)	60,041	389	90,901
(Benefit)/provision for income taxes	23,578	22,495	36,816	56,294
Equity in earnings of affiliates, net of tax	11,745	5,719	21,215	12,053
Net income/(loss) from continuing operations, net of tax	41,143	40,289	70,101	62,710
Gain from discontinued operations, net of tax	983	(8,556)	(7,985)	(6,905)
Gain on sale of discontinued operations, net of tax	466	0	(2,987)	0
Net income/(loss)	42,592	31,733	59,129	55,805
Less: Net loss attributable to noncontrolling interests	(65)	248	(158)	1,065
Net income/(loss) attributable to CoreLogic	42,657	31,485	59,287	54,740
Total other comprehensive income/(loss)	(2,762)	(2,509)	1,373	(16,606)
Comprehensive income/(loss) attributable to CoreLogic	39,895	28,976	60,660	38,134
Parent [Member]
Operating revenues	0	0	0	0
External cost of revenues	0	538	0	925
Salaries and benefits	19,054	16,885	41,432	40,358
Other operating expenses	(5,785)	6,635	(10,264)	4,639
Depreciation and amortization	603	931	1,528	1,858
(Loss)/income from continuing operations	(13,872)	(24,989)	(32,696)	(47,780)
Total interest expense, net	(12,508)	(21,457)	(25,999)	(29,433)
(Loss)/gain on investment and other, net	(296)	59,952	1,345	66,659
(Benefit)/provision for income taxes	(6,944)	5,700	(21,470)	10,284
Equity in earnings of affiliates, net of tax	0	0	0	0
Equity in earnings of subsidiary, net of tax	62,323	23,927	95,010	76,644
Net income/(loss) from continuing operations, net of tax	42,591	31,733	59,130	55,806
Gain from discontinued operations, net of tax	0	0	0	0
Gain on sale of discontinued operations, net of tax	0		0
Net income/(loss)	42,591	31,733	59,130	55,806
Less: Net loss attributable to noncontrolling interests	(65)	248	(158)	1,065
Net income/(loss) attributable to CoreLogic	42,656	31,485	59,288	54,741
Total other comprehensive income/(loss)	(2,762)	(2,509)	1,373	(16,606)
Comprehensive income/(loss) attributable to CoreLogic	39,894	28,976	60,661	38,135
Guarantor Subsidiaries [Member]
Operating revenues	367,018	295,767	702,802	590,792
External cost of revenues	89,513	67,522	167,067	130,603
Salaries and benefits	102,513	107,159	207,172	212,230
Other operating expenses	68,623	59,325	133,015	119,426
Depreciation and amortization	24,059	22,249	46,826	43,503
(Loss)/income from continuing operations	82,310	39,512	148,722	85,030
Total interest expense, net	(2)	(186)	188	41
(Loss)/gain on investment and other, net	(1,547)	7	(1,547)	24,160
(Benefit)/provision for income taxes	27,960	15,628	56,365	43,064
Equity in earnings of affiliates, net of tax	11,405	5,797	20,571	12,131
Equity in earnings of subsidiary, net of tax	0	0	0	0
Net income/(loss) from continuing operations, net of tax	64,206	29,502	111,569	78,298
Gain from discontinued operations, net of tax	983	(8,556)	(7,985)	(6,905)
Gain on sale of discontinued operations, net of tax	466		(2,987)
Net income/(loss)	65,655	20,946	100,597	71,393
Less: Net loss attributable to noncontrolling interests	0	0	0	0
Net income/(loss) attributable to CoreLogic	65,655	20,946	100,597	71,393
Total other comprehensive income/(loss)	0	120	0	(13,973)
Comprehensive income/(loss) attributable to CoreLogic	65,655	21,066	100,597	57,420
Non-Guarantor Subsidiaries [Member]
Operating revenues	22,343	32,654	44,660	53,911
External cost of revenues	3,703	1,277	6,530	1,750
Salaries and benefits	12,943	17,983	23,648	30,435
Other operating expenses	330	5,986	5,677	9,613
Depreciation and amortization	6,243	3,098	12,042	3,954
(Loss)/income from continuing operations	(876)	4,310	(3,237)	8,159
Total interest expense, net	(824)	(166)	(1,665)	33
(Loss)/gain on investment and other, net	591	82	591	82
(Benefit)/provision for income taxes	2,562	1,167	1,921	2,946
Equity in earnings of affiliates, net of tax	340	(78)	644	(78)
Equity in earnings of subsidiary, net of tax	0	0	0	0
Net income/(loss) from continuing operations, net of tax	(3,331)	2,981	(5,588)	5,250
Gain from discontinued operations, net of tax	0	0	0	0
Gain on sale of discontinued operations, net of tax	0		0
Net income/(loss)	(3,331)	2,981	(5,588)	5,250
Less: Net loss attributable to noncontrolling interests	0	0	0	0
Net income/(loss) attributable to CoreLogic	(3,331)	2,981	(5,588)	5,250
Total other comprehensive income/(loss)	(3,152)	1,023	1,015	1,291
Comprehensive income/(loss) attributable to CoreLogic	(6,483)	4,004	(4,573)	6,541
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
(Loss)/gain 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	(62,323)	(23,927)	(95,010)	(76,644)
Net income/(loss) from continuing operations, net of tax	(62,323)	(23,927)	(95,010)	(76,644)
Gain from discontinued operations, net of tax	0	0	0	0
Gain on sale of discontinued operations, net of tax	0		0
Net income/(loss)	(62,323)	(23,927)	(95,010)	(76,644)
Less: Net loss attributable to noncontrolling interests	0	0	0	0
Net income/(loss) attributable to CoreLogic	(62,323)	(23,927)	(95,010)	(76,644)
Total other comprehensive income/(loss)	3,152	(1,143)	(1,015)	12,682
Comprehensive income/(loss) attributable to CoreLogic	(59,171)	(25,070)	(96,025)	(63,962)
Total [Member]
Operating revenues	389,361	328,421	747,462	644,703
External cost of revenues	93,216	69,337	173,597	133,278
Salaries and benefits	134,510	142,027	272,252	283,023
Other operating expenses	63,168	71,946	128,428	133,678
Depreciation and amortization	30,905	26,278	60,396	49,315
(Loss)/income from continuing operations	67,562	18,833	112,789	45,409
Total interest expense, net	(13,334)	(21,809)	(27,476)	(29,359)
(Loss)/gain on investment and other, net	(1,252)	60,041	389	90,901
(Benefit)/provision for income taxes	23,578	22,495	36,816	56,294
Equity in earnings of affiliates, net of tax	11,745	5,719	21,215	12,053
Equity in earnings of subsidiary, net of tax	0	0	0	0
Net income/(loss) from continuing operations, net of tax	41,143	40,289	70,101	62,710
Gain from discontinued operations, net of tax	983	(8,556)	(7,985)	(6,905)
Gain on sale of discontinued operations, net of tax	466		(2,987)
Net income/(loss)	42,592	31,733	59,129	55,805
Less: Net loss attributable to noncontrolling interests	(65)	248	(158)	1,065
Net income/(loss) attributable to CoreLogic	42,657	31,485	59,287	54,740
Total other comprehensive income/(loss)	(2,762)	(2,509)	1,373	(16,606)
Comprehensive income/(loss) attributable to CoreLogic	$ 39,895	$ 28,976	$ 60,660	$ 38,134