Fair Value of Financial Instruments (Carrying Amounts and Fair Values of Financial Instruments) (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Cash and cash equivalents	$ 833,857	$ 627,208
Accounts and accrued income receivable, net	254,941	259,779
Loans receivable, net	77,045	111,925
Deposits with savings and loan associations and banks	60,986	71,400
Securities	3,094,284	2,849,801
Notes receivable, net	8,618	11,376
Deposits	1,724,485	1,411,575
Accounts payable and accrued liabilities	304,885	337,231
Due to CoreLogic, net	54,220	53,510
Notes and contracts payable	315,535	233,071
Debt Securities
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Securities	2,843,759	2,651,881
Equity Securities
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Securities	250,525	197,920
Carrying Amount
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Cash and cash equivalents	833,857	627,208
Accounts and accrued income receivable, net	254,941	259,779
Loans receivable, net	77,067	107,352
Deposits with savings and loan associations and banks	60,964	71,196
Notes receivable, net	10,231	11,166
Deposits	1,724,209	1,411,193
Accounts payable and accrued liabilities	304,885	337,231
Due to CoreLogic, net	54,220	53,510
Notes and contracts payable	320,521	229,760
Carrying Amount | Debt Securities
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Securities	2,843,759	2,651,881
Carrying Amount | Equity Securities
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Securities	250,525	197,920
Fair Value
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Cash and cash equivalents	833,857	627,208
Accounts and accrued income receivable, net	254,941	259,779
Loans receivable, net	77,045	111,925
Deposits with savings and loan associations and banks	60,986	71,400
Notes receivable, net	8,618	11,376
Deposits	1,724,485	1,411,575
Accounts payable and accrued liabilities	304,885	337,231
Due to CoreLogic, net	54,220	53,510
Notes and contracts payable	315,535	233,071
Fair Value | Debt Securities
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Securities	2,843,759	2,651,881
Fair Value | Equity Securities
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Securities	$ 250,525	$ 197,920