v2.4.0.6

Income taxes (Details 2) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2012
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Operating loss carryforwards |
Net operating loss carryforwards | $ 384,401
2027 |
Operating loss carryforwards |
Net operating loss carryforwards | 63,565
2028 |
Operating loss carryforwards |
Net operating loss carryforwards | 104,436
2029 |
Operating loss carryforwards |
Net operating loss carryforwards | 85,277
2030 |
Operating loss carryforwards |
Net operating loss carryforwards | 25,805
2031 |
Operating loss carryforwards |
Net operating loss carryforwards | 59,265
2032 |
Operating loss carryforwards |
Net operating loss carryforwards | $ 46,053

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- Definition The sum of domestic, foreign and state and local operating loss carryforwards, 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 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 48 -Subparagraph a -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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. + Details
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