Acquisitions, Goodwill, and Other Intangible Assets (Narrative) (Details) (USD $)
|
12 Months Ended | 1 Months Ended | 0 Months Ended | 1 Months Ended | 12 Months Ended | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2012
Countries
|
Dec. 31, 2011
|
Dec. 31, 2010
|
Mar. 31, 2010
Aegis Equities Research [Member]
Years
|
Apr. 02, 2010
Aegis Equities Research [Member]
|
Apr. 02, 2010
Aegis Equities Research [Member]
Deductions for Income Tax Purposes [Member]
|
Apr. 12, 2010
Old Broad Street Research Ltd. [Member]
|
May 03, 2010
Realpoint, LLC [Member]
|
Jul. 02, 2010
Morningstar Denmark [Member]
|
Nov. 30, 2010
Annuity Intelligence Business of Advanced Sales and Marketing Corporation [Member]
Years
|
Nov. 02, 2010
Annuity Intelligence Business of Advanced Sales and Marketing Corporation [Member]
|
Jul. 02, 2010
Footnoted business of Financial Fineprint Inc. and Seeds Group [Member]
|
Dec. 31, 2011
Aspect Huntley [Member]
|
Jul. 02, 2010
75% [Member]
Morningstar Denmark [Member]
|
Jul. 02, 2010
25% [Member]
Morningstar Denmark [Member]
|
|
Business Acquisition [Line Items] | |||||||||||||||
Cash paid to acquire the entity | $ 10,269,000 | $ 17,937,000 | $ 38,327,000 | $ 6,113,000 | $ 15,467,000 | $ 4,725,000 | |||||||||
Intangible assets | 1,787,000 | ||||||||||||||
Intangible assets | 5,801,000 | 9,266,000 | 19,120,000 | 9,854,000 | 6,300,000 | 2,661,000 | |||||||||
Business acquisition, purchase price | 14,113,000 | ||||||||||||||
Number of shares of restricted stock issued to acquire the entity | 199,174 | ||||||||||||||
Amortization period for tax purposes assigned to goodwill and intangible assets, in years | 3 | 15 | |||||||||||||
Equity method investment, ownership percentage | 75.00% | ||||||||||||||
Ownership percentage | 100.00% | ||||||||||||||
Business Acquisition, Purchase Price Allocation, Assets Acquired (Liabilities Assumed), Net | 10,320,000 | 22,569,000 | 43,816,000 | 20,192,000 | 14,113,000 | 7,555,000 | |||||||||
Goodwill impairment loss | 0 | 0 | |||||||||||||
Deferred tax liability | 2,317,000 | 2,504,000 | 800,000 | ||||||||||||
Number of countries in which entity operates, approximately | 27 | ||||||||||||||
Holding gain upon acquisition of additional ownership of equity | 0 | 0 | 4,564,000 | 4,564,000 | |||||||||||
Goodwill | 5,117,000 | 12,422,000 | 24,903,000 | 12,342,000 | 9,028,000 | 3,869,000 | |||||||||
Total deferred tax liabilities | (43,193,000) | (37,385,000) | |||||||||||||
Noncontrolling interest | 1,378,000 | 1,646,000 | |||||||||||||
Impairment loss | $ 800,000 |