Guarantor Subsidiaries (Balance Sheet) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2012	Dec. 31, 2011	Mar. 31, 2013 Parent [Member]	Dec. 31, 2012 Parent [Member]	Feb. 06, 2012 Parent [Member]	Dec. 31, 2011 Parent [Member]	Mar. 31, 2013 Guarantor Subsidiaries [Member]	Dec. 31, 2012 Guarantor Subsidiaries [Member]	Feb. 06, 2012 Guarantor Subsidiaries [Member]	Dec. 31, 2011 Guarantor Subsidiaries [Member]	Mar. 31, 2013 Non-Guarantor Subsidiaries [Member]	Dec. 31, 2012 Non-Guarantor Subsidiaries [Member]	Feb. 06, 2012 Non-Guarantor Subsidiaries [Member]	Dec. 31, 2011 Non-Guarantor Subsidiaries [Member]	Mar. 31, 2013 Consolidation, Eliminations [Member]	Dec. 31, 2012 Consolidation, Eliminations [Member]	Feb. 06, 2012 Consolidation, Eliminations [Member]	Dec. 31, 2011 Consolidation, Eliminations [Member]	Mar. 31, 2013 Total [Member]	Dec. 31, 2012 Total [Member]	Feb. 06, 2012 Total [Member]	Dec. 31, 2011 Total [Member]
Assets
Cash and cash equivalents	$ 125,559		$ 256,359	$ 259,266	$ 95,396	$ 111,305	$ 242,462	$ 229,871	$ 9,582	$ 1,812	$ (3,887)	$ 9,106	$ 20,581	$ 35,741	$ 17,784	$ 20,289	$ 0	$ 0	$ 0	$ 0	$ 125,559	$ 148,858	$ 256,359	$ 259,266
Other current assets					44,016	59,977			358,565	364,178			24,419	17,352			0	(441)			427,000	441,066
Property and equipment, net	186,399	186,617			14,951	14,921			140,006	139,831			31,442	31,865			0	0			186,399	186,617
Goodwill	1,504,246	1,504,232			0	0			1,336,328	1,323,700			167,918	180,532			0	0			1,504,246	1,504,232
Other intangible assets, net	170,106	171,584			390	0			122,875	123,011			46,841	48,573			0	0			170,106	171,584
Capitalized data and database costs, net	324,216				0	0			240,916	238,598			83,300	83,691			0	0			324,216	322,289
Investment in affiliates, net	97,233				0	0			91,658	88,647			5,575	5,580			0	0			97,233	94,227
Deferred income tax assets, long-term					59,523	59,523			0	0			0	0			(59,523)	(59,523)			0	0
Restricted cash	22,158				18,303	18,299			305	305			3,550	3,513			0	0			22,158	22,117
Investments in subsidiaries					1,905,600	1,853,561			0	0			0	0			(1,905,600)	(1,853,561)			0	0
Intercompany Receivable					62,707	65,885			160,946	125,587			0				(223,653)	(191,472)			0	0
Other assets	151,274				108,597	107,976			40,249	28,420			2,428	2,441			0	0			151,274	138,837
Total assets	3,008,191				2,309,483	2,291,447			2,501,430	2,434,089			386,054	409,288			(2,188,776)	(2,104,997)			3,008,191	3,029,827
Liabilities and Equity
Current liabilities	502,937	517,091			106,118	82,668			371,691	406,890			25,128	27,974			0	(441)			502,937	517,091
Long-term debt, net	788,048	792,324			779,095	783,470			8,953	8,854			0	0			0	0			788,048	792,324
Deferred revenue	342,731	309,418			0	0			342,731	309,418			0	0			0	0			342,731	309,418
Deferred income taxes, long term	74,947	71,361			0	0			114,637	111,051			19,833	19,833			(59,523)	(59,523)			74,947	71,361
Intercompany Payable					160,946	125,587			0				62,707	65,885			(223,653)	(191,472)			0	0
Other liabilities	166,546	168,687			130,342	130,421			30,428	33,011			5,776	5,255			0	0			166,546	168,687
Total Corelogic's stockholders' equity	1,132,982	1,169,301			1,132,982	1,169,301			1,632,990	1,564,865			272,610	288,696			(1,905,600)	(1,853,561)			1,132,982	1,169,301
Noncontrolling interests	0	1,645			0	0			0	0			0	1,645			0	0			0	1,645
Total liabilities and equity	$ 3,008,191	$ 3,029,827			$ 2,309,483	$ 2,291,447			$ 2,501,430	$ 2,434,089			$ 386,054	$ 409,288			$ (2,188,776)	$ (2,104,997)			$ 3,008,191	$ 3,029,827