Investments in Affiliates Joint Venture (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Equity Method Investments Income Tax Of Affiliates [Abstract]
Income Tax Of Equity In Earnings Of Affiliate	$ 5,600,000	$ 9,000,000	$ 13,600,000	$ 19,500,000
Equity Method Investment, Summarized Financial Information, Gross Profit (Loss) [Abstract]
Assumed Ownership Percentage For Affiliate	100.00%		100.00%
Joint Venture Loan Originations Products and Services [Member]
Equity Method Investment, Summarized Financial Information, Gross Profit (Loss) [Abstract]
Net revenues	105,187,000	131,994,000	279,500,000	347,703,000
Expenses	81,429,000	94,552,000	220,055,000	257,066,000
Income before income taxes	23,758,000	37,442,000	59,445,000	90,637,000
Net Income	23,582,000	37,130,000	58,974,000	90,030,000
Corelogic equity in earnings of affiliate	$ 11,815,000	$ 18,603,000	$ 29,546,000	$ 45,105,000
Equity Method Investment, Ownership Percentage	50.10%		50.10%
Joint Venture Investment Percentage Of Income In Equity Earnings Of Affiliates, Net Of Tax	85.00%	82.60%	86.90%	91.50%