Significant Accounting Policies (Narrative) (Details) (USD $)	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 Y	Dec. 31, 2011	Dec. 31, 2010
Significant Accounting Policies [Line Items]
Total current assets	$ 589,924,000				$ 702,913,000				$ 589,924,000	$ 702,913,000
Total assets	3,029,827,000				3,118,700,000				3,029,827,000	3,118,700,000
Prior period adjustment, increase to provision for income taxes, discontinued operations									4,100,000
Capitalized Data and Database Development Costs, Net [Abstract]
Capitalized data and database costs carrying value	486,069,000				444,516,000				486,069,000	444,516,000
Other Intangible Assets [Abstract]
Useful life of other intangible assets, minimum (in years)									2
Useful life of other intangible assets, maximum (in years)									20
Revenue Recognition [Abstract]
Subscription-based Revenues Contractual Term In Years									10 years
Share-based Compensation [Abstract]
Employee Stock Purchase Plan Percent of Stock Price At Closing Date	85.00%								85.00%
Escrow Administration Arrangements [Abstract]
Escrow Deposit	228,900,000				593,900,000				228,900,000	593,900,000
Reserves Incorrect Disposition Of Assets	19,400,000				16,000,000				19,400,000	16,000,000
Payments to Acquire Additional Interest in Subsidiaries									0	72,000,000	385,847,000
Net income/(loss) attributable to CoreLogic	14,685,000	38,320,000	42,657,000	16,631,000	(22,160,000)	(107,190,000)	31,485,000	23,256,000	112,293,000	(74,609,000)	(56,300,000)
Flood [Member]
Capitalized Data and Database Development Costs, Net [Abstract]
Capitalized data and database costs carrying value	52,916,000				52,916,000				52,916,000	52,916,000
Buildings [Member]
Property, Plant and Equipment [Abstract]
Property and equipment, estimated useful lives, minimum (in years)									25
Property and equipment, estimated useful lives, maximum (in years)									40
Furniture and equipment [Member]
Property, Plant and Equipment [Abstract]
Property and equipment, estimated useful lives, minimum (in years)									3
Property and equipment, estimated useful lives, maximum (in years)									10
Capitalized software [Member]
Property, Plant and Equipment [Abstract]
Property and equipment, estimated useful lives, minimum (in years)									3
Property and equipment, estimated useful lives, maximum (in years)									10
Database Development Costs [Member]
Property, Plant and Equipment [Abstract]
Property and equipment, estimated useful lives, minimum (in years)									7
Property and equipment, estimated useful lives, maximum (in years)									20
Maximum [Member]
Escrow Administration Arrangements [Abstract]
Escrow Deposits, Period Held									5 years
Minimum [Member]
Escrow Administration Arrangements [Abstract]
Escrow Deposits, Period Held									2 years
Guarantor Subsidiaries [Member]
Significant Accounting Policies [Line Items]
Total assets	2,434,089,000				2,314,615,000				2,434,089,000	2,314,615,000
Escrow Administration Arrangements [Abstract]
Payments to Acquire Additional Interest in Subsidiaries										72,000,000	385,847,000
Net income/(loss) attributable to CoreLogic									191,244,000	(44,155,000)	122,185,000
Restatement Adjustment [Member] | Dorado and RP Data [Member] | Deferred Taxes [Member]
Escrow Administration Arrangements [Abstract]
Restatement of Prior Year Income, Gross									(7,266,000)
Restatement Adjustment [Member] | Dorado and RP Data [Member] | Goodwill, Data and Analytics [Member]
Escrow Administration Arrangements [Abstract]
Restatement of Prior Year Income, Gross									(7,152,000)
Restatement Adjustment [Member] | Dorado and RP Data [Member] | Goodwill, Mortgage Origination Services [Member]
Escrow Administration Arrangements [Abstract]
Restatement of Prior Year Income, Gross									(114,000)
Discontinued Operations [Member] | Restatement Adjustment [Member]
Significant Accounting Policies [Line Items]
Prior period adjustment, increase to provision for income taxes, discontinued operations		4,100,000
Escrow Administration Arrangements [Abstract]
Earnings Per Share, Basic and Diluted									$ 0.04
Continuing Operations [Member] | Restatement Adjustment [Member]
Escrow Administration Arrangements [Abstract]
Earnings Per Share, Basic and Diluted									$ 0.05
Prior Period Adjustment, Increase to Provision for Income Taxes, Continuing Operations	5,600,000									500,000
Reclassification [Member]
Significant Accounting Policies [Line Items]
Total current assets					46,934,000					46,934,000
Non-current assets					(38,305,000)					(38,305,000)
Total assets					8,629,000					8,629,000
Escrow Administration Arrangements [Abstract]
Net income/(loss) attributable to CoreLogic										0	0
Reclassification [Member] | Guarantor Subsidiaries [Member]
Significant Accounting Policies [Line Items]
Total current assets					46,313,000					46,313,000
Non-current assets					15,419,000					15,419,000
Escrow Administration Arrangements [Abstract]
Net income/(loss) attributable to CoreLogic										1,098,000	(38,088,000)
Reclassification [Member] | Deferred Taxes [Member]
Significant Accounting Policies [Line Items]
Non-current assets					$ (38,305,000)					$ (38,305,000)