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Subsequent Events Subsequent Events (Details) In Thousands, except Share data, unless otherwise specified | 3 Months Ended | 6 Months Ended | 3 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | ---
Dec. 31, 2013 USD ($) | Dec. 31, 2012 USD ($) | Dec. 31, 2013 USD ($) | Dec. 31, 2012 USD ($) | Mar. 31, 2014 Tilda [Member] USD ($) | Mar. 31, 2014 Tilda [Member] GBP (£) | Dec. 31, 2013 Tilda [Member] USD ($) | Jan. 13, 2014 Tilda [Member] USD ($)
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Revenues | $ 534,879 | $ 455,319 | $ 1,012,363 | $ 815,126 |  |  | $ 190,000 |
Payments to Acquire Businesses, Gross |  |  |  |  | 176,325 | 107,000 |  |
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares |  |  |  |  | 1,646,173 | 1,646,173 |  |
Business Acquisition, Equity Interest Issued or Issuable, Value Assigned | 102,636 |  | 102,636 |  |  |  |  | 150,641
Business Combination, Consideration Transferred, Liabilities Incurred |  |  |  |  |  | £ 20,000 |  |

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- Definition Value of equity interests (such as common shares, preferred shares, or partnership interest) issued or issuable to acquire the entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b)(4) -URI http://asc.fasb.org/extlink&oid=7488404&loc=d3e6927-128479 + Details
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- Definition Amount of liabilities incurred by the acquirer as part of consideration transferred in a business combination. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 25 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6911189&loc=d3e6405-128476 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6578-128477 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6613-128477 + Details
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- Definition The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585 + Details
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