Goodwill (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Goodwill [Roll Forward]
Goodwill			$ 1,284,457
Accumulated impairment losses			(7,525)
Goodwill, net	1,472,206	1,289,888
Goodwill, net	1,289,888	1,276,932
Acquisitions	192,083	13,622
Goodwill, Translation Adjustments		308
Translation adjustments	(7,678)
Other	(2,087)	(974)
Goodwill, net	1,472,206	1,289,888
Data and Analytics [Member]
Goodwill [Roll Forward]
Goodwill			485,488
Accumulated impairment losses			(600)
Goodwill, net	649,048	484,307
Goodwill, net	484,307	484,888
Acquisitions	172,419	0
Goodwill, Translation Adjustments		308
Translation adjustments	(7,678)
Other	0	(889)
Goodwill, net	649,048	484,307
Mortgage Origination Services [Member]
Goodwill [Roll Forward]
Goodwill			661,682
Accumulated impairment losses			(6,925)
Goodwill, net	673,749	656,172
Goodwill, net	656,172	654,757
Acquisitions	19,664	1,500
Goodwill, Translation Adjustments		0
Translation adjustments	0
Other	(2,087)	(85)
Goodwill, net	673,749	656,172
Default Services [Member]
Goodwill [Roll Forward]
Goodwill			137,287
Accumulated impairment losses			0
Goodwill, net	149,409	149,409
Goodwill, net	149,409	137,287
Acquisitions	0	12,122
Goodwill, Translation Adjustments		0
Translation adjustments	0
Other	0	0
Goodwill, net	$ 149,409	$ 149,409

Carrying amount as of the balance sheet date, which is the cumulative amount paid and (if applicable) the fair value of any noncontrolling interest in the acquiree, adjusted for any amortization recognized prior to the adoption of any changes in generally accepted accounting principles (as applicable) and for any impairment charges, in excess of the fair value of net assets acquired in one or more business combination transactions.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 142

-Paragraph 45

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Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

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-Publisher FASB

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-Publisher FASB

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-Number 141R

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Reference 6: http://www.xbrl.org/2003/role/presentationRef

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+ Details

- Definition

The aggregate amount of goodwill acquired in the period and allocated to the reportable segment. The value is stated at fair value based on the purchase price allocation.

+ References+ Details

- Definition

The increase (decrease) in the recorded value of goodwill for foreign currency translation adjustments and purchase accounting adjustments needed to revise the carrying amount of goodwill to fair value.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 142

-Subparagraph e

-Paragraph 45

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 142

-Subparagraph e

-Paragraph 45

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 142

-Subparagraph e

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details