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Taxation (Narrative) (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013 | Mar. 31, 2015
Operating Loss Carryforwards [Line Items] |  |  |  |
Change in valuation allowance | $ (43,800) | $ 5,600 | $ 21,000 |
Valuation allowance | 17,852 | 61,660 |  |
Income taxes paid | 10,300 | 1,100 | $ 1,200 |
Unrecognized tax benefits | 0 | 0 |  |
Interest and penalties accrued on unrecognized tax benefits | 0 | 0 |  |
U.S. |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |
Valuation allowance |  | $ 48,500 |  | $ 1,000
Internal Revenue Service (IRS) |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |
Operating loss carryforwards | 66,100 |  |  |
Ireland |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |
Operating loss carryforwards | 11,000 |  |  |
United Kingdom |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |
Operating loss carryforwards | 59,300 |  |  |
Singapore |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |
Operating loss carryforwards | $ 6,500 |  |  |

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- Definition Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32537-109319 + Details
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- Definition The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4297-108586 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 25 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3536-108585 + Details
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- Definition Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32559-109319 + Details
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- Definition Amount of unrecognized tax benefits pertaining to uncertain tax positions taken in tax returns. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6907707&loc=SL6600010-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Unrecognized Tax Benefit -URI http://asc.fasb.org/extlink&oid=6527854 + Details
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