Acquisitions (MSB/DQ Purchase Price Allocation) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013
Business Acquisition [Line Items]
Goodwill, Acquired During Period	$ 324,941us-gaap_GoodwillAcquiredDuringPeriod	$ 55,788us-gaap_GoodwillAcquiredDuringPeriod
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net	652,519
MSB/DQ Member [Domain]
Business Acquisition [Line Items]
Goodwill, Acquired During Period	307,773
Data and Analytics [Member]
Business Acquisition [Line Items]
Goodwill, Acquired During Period	285,801	26,846
Data and Analytics [Member] \| MSB/DQ Member [Domain]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents	36
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables	9,227
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Prepaid Expense and Other Assets	2,190
Business Combination, Recognized Intangible Assets Acquired, Deferred Tax Asset Current	6,658
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment	177,311
Goodwill, Acquired During Period	277,800
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	129,400
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Assets Noncurrent	29,760
Business Combination, Recognized Intangible Assets Acquired, equity method investment	18,300
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets	680,655
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable	3,911
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Income Tax Payable	31
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Deferred Revenue	22,371
business acquisition, recognized identifiable assets acquired, deferred revenue non current	$ 1,823

business acquisition, recognized identifiable assets acquired, deferred revenue non current

No definition available.

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- Definition

Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Income Tax Payable

+ References

No definition available.

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- Definition

Business Combination, Recognized Intangible Assets Acquired, Deferred Tax Asset Current

+ References

No definition available.

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- Definition

Business Combination, Recognized Intangible Assets Acquired, Equity Method Investment

+ References

No definition available.

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- Definition

Amount of assets acquired at the acquisition date.

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- Definition

Amount of currency on hand as well as demand deposits with banks or financial institutions, acquired at the acquisition date. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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- Definition

Amount of asset related to consideration paid in advance for costs that provide economic benefits in future periods, and amount of other assets that are expected to be realized or consumed within one year or the normal operating cycle, if longer, acquired at the acquisition date.

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- Definition

Amount due from customers or clients for goods or services, including trade receivables, that have been delivered or sold in the normal course of business, and amounts due from others, including related parties expected to be converted to cash, sold or exchanged within one year or the normal operating cycle, if longer, acquired at the acquisition date.

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- Definition

Amount of liabilities incurred for goods and services received that are used in an entity's business and related party payables, assumed at the acquisition date.

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- Definition

Amount of deferred revenue expected to be recognized as such within one year or the normal operating cycle, if longer, assumed at the acquisition date.

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- Definition

Amount of deferred tax asset attributable to deductible temporary differences and carryforwards that are expected to be realized or consumed after one year or the normal operating cycle, if longer, acquired at the acquisition date.

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- Definition

The amount of identifiable intangible assets recognized as of the acquisition date.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (c)

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-Topic 805

-SubTopic 10

-Section 55

-Paragraph 37

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- Definition

Amount recognized as of the acquisition date for the identifiable assets acquired in excess of (less than) the aggregate liabilities assumed.

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- Definition

The amount of property, plant, and equipment recognized as of the acquisition date.

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- Definition

Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 50

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