Segment Information (Details) (USD $)	3 Months Ended	6 Months Ended
Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010	Dec. 31, 2010	Dec. 29, 2010
Segment Reporting Information [Line Items]
Operating Revenues	$ 396,402,000	$ 410,976,000	$ 800,396,000	$ 808,844,000
Depreciation and Amortization	28,463,000	27,632,000	53,674,000	53,603,000
Income (Loss) from Continuing Operations	31,733,000	9,510,000	55,805,000	29,570,000
Capital Expenditures	14,253,000	7,104,000	25,463,000	28,156,000
Assets	3,261,752,000		3,261,752,000		3,219,832,000
Number of Reportable Segments	2		2			3
Data and Analytics [Member]
Segment Reporting Information [Line Items]
Segment Reporting Intercompany Revenue	3,300,000	4,400,000	8,100,000	9,100,000
Segment Reporting Intercompany Expense	6,100,000	5,900,000	13,200,000	9,400,000
Operating Revenues	200,016,000	188,063,000	403,243,000	369,530,000
Depreciation and Amortization	17,090,000	14,814,000	32,388,000	29,813,000
Income (Loss) from Continuing Operations	19,068,000	33,242,000	79,752,000	62,336,000
Capital Expenditures	6,810,000	4,923,000	11,486,000	6,578,000
Assets	1,192,001,000		1,192,001,000		1,201,711,000
Number Of Components	2		2
Business and Information Services [Member]
Segment Reporting Information [Line Items]
Segment Reporting Intercompany Revenue	500,000	3,100,000	1,100,000	6,000,000
Segment Reporting Intercompany Expense	11,600,000	9,900,000	23,500,000	18,500,000
Operating Revenues	199,791,000	228,064,000	406,113,000	444,156,000
Depreciation and Amortization	6,603,000	5,303,000	11,669,000	10,624,000
Income (Loss) from Continuing Operations	28,555,000	51,822,000	61,897,000	94,527,000
Capital Expenditures	3,976,000	1,585,000	6,674,000	5,717,000
Assets	1,622,778,000		1,622,778,000		1,089,492,000
Number Of Components	2		2
Corporate Elimination [Member]
Segment Reporting Information [Line Items]
Operating Revenues	(3,405,000)	(5,151,000)	(8,960,000)	(4,842,000)
Depreciation and Amortization	4,770,000	7,515,000	9,617,000	13,166,000
Income (Loss) from Continuing Operations	(15,890,000)	(75,554,000)	(85,844,000)	(127,293,000)
Capital Expenditures	3,467,000	596,000	7,303,000	15,861,000
Assets	$ 446,973,000		$ 446,973,000		$ 928,629,000

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Number of Reportable Segments

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Segment Reporting Information Intercompany Expense

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Segment Reporting Information Intercompany Revenue

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Total expenditures for additions to long-lived assets other than financial instruments, long-term customer relationships of a financial institution, mortgage and other servicing rights, deferred policy acquisition costs, and deferred tax assets of the reportable segment; if the amount: (a) is included in the determination of segment assets reviewed by the chief operating decision maker or (b) is otherwise regularly provided to the chief operating decision maker, even if not included in the determination of segment assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 131
-Paragraph 28
-Subparagraph b
-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.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
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-Publisher FASB
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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.

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-Number 51
-Paragraph 29
-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.

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-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 45
-Paragraph 19
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Aggregate revenue during the period from services rendered in the normal course of business, after deducting allowances and discounts.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
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-Paragraph 1

Reference 2: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
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-Paragraph 2
-Subparagraph (SX 210.5-03.1(d))
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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amount of net assets (total assets less total liabilities) attributed to the reportable segment.

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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.

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