v2.4.0.6

Commitments and contingencies (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2012 item | Dec. 31, 2011 | Dec. 31, 2010
Commitments and contingencies |  |  |
Rent expense for leases from governmental authorities | $ 16,760 | $ 15,511 | $ 12,499
Interest expense associated with the capital leases | 11 | 8 | 30
Rent expense for leases of office facilities | 1,209 | 1,323 | 1,325
Sublease income included in rent expenses | 52 | 32 |
Capital Leases |  |  |
2013 | 42 |  |
2014 | 42 |  |
2015 | 42 |  |
2016 | 52 |  |
Capital leases minimum lease payments | 178 |  |
Current portion | 42 | 205 |
Non-current portion | 136 | 197 |
Operating Leases and Airport Guarantees |  |  |
2013 | 7,409 |  |
2014 | 6,068 |  |
2015 | 4,985 |  |
2016 | 4,860 |  |
2017 | 4,727 |  |
Thereafter | 21,602 |  |
Minimum lease payments | $ 49,651 |  |
Employment contracts |  |  |
Number of officers with whom the entity entered into employment contracts | 2 |  |

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- Definition Amount of minimum lease payments maturing in the next fiscal year following the latest fiscal year for capital leases. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6455398&loc=d3e45280-112737 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 13 -Paragraph 16 -Subparagraph a(ii) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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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- Definition The amount, during the lease term, of each minimum [capital] lease payment allocated to interest expense so as to produce a constant periodic rate of interest on the remaining balance of the capital lease obligation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.8) -URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 30 -Section 35 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6916424&loc=d3e43161-112731 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 13 -Paragraph 12 -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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