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Commitments and contingencies (Details) (USD $)
In Thousands, unless otherwise specified |
12 Months Ended | ||
|---|---|---|---|
|
Dec. 31, 2012
item
|
Dec. 31, 2011
|
Dec. 31, 2010
|
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| 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 | ||
| X | ||||||||||
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- Definition
Amount equal to the present value (the principal) at the beginning of the lease term of minimum lease payments during the lease term (excluding that portion of the payments representing executory costs such as insurance, maintenance, and taxes to be paid by the lessor, together with any profit thereon) net of payments or other amounts applied to the principal, through the balance sheet date and due to be paid within one year (or one operating cycle, if longer) of the balance sheet date. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Amount equal to the present value (the principal) at the beginning of the lease term of minimum lease payments during the lease term (excluding that portion of the payments representing executory costs such as insurance, maintenance, and taxes to be paid by the lessor, together with any profit thereon) net of payments or other amounts applied to the principal, through the balance sheet date and due to be paid more than one year (or one operating cycle, if longer) after the balance sheet date. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Amount of minimum lease payments for capital leases. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Details
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| X | ||||||||||
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- Definition
Amount of minimum lease payments maturing in the next fiscal year following the latest fiscal year for capital leases. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Amount of minimum lease payments maturing in the forth fiscal year following the latest fiscal year for capital leases. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Amount of minimum lease payments maturing in the third fiscal year following the latest fiscal year for capital leases. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Amount of minimum lease payments maturing in the second fiscal year following the latest fiscal year for capital leases. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Details
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| X | ||||||||||
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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. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Rental expense incurred for leased assets including furniture and equipment which has not been recognized in costs and expenses applicable to sales and revenues; for example, cost of goods sold or other operating costs and expenses. No definition available.
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| X | ||||||||||
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- Definition
The total amount of sublease rental income recognized during the period that reduces the entity's rent expense incurred under operating leases. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Details
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| X | ||||||||||
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- Definition
Represents the number of officers with whom the entity entered into an employment contract. No definition available.
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| X | ||||||||||
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- Definition
Amount of required minimum rental payments for leases and airport guarantees having an initial or remaining non-cancelable letter-term in excess of one year. No definition available.
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| X | ||||||||||
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- Details
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| X | ||||||||||
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- Definition
Amount of required minimum rental payments maturing in the next fiscal year following the latest fiscal year for operating leases and airport guarantees having an initial or remaining non-cancelable letter-term in excess of one year. No definition available.
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| X | ||||||||||
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- Definition
Amount of required minimum rental payments maturing in the fifth fiscal year following the latest fiscal year for operating leases and airport guarantees having an initial or remaining non-cancelable letter-term in excess of one year. No definition available.
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| X | ||||||||||
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- Definition
Amount of required minimum rental payments maturing in the fourth fiscal year following the latest fiscal year for operating leases and airport guarantees having an initial or remaining non-cancelable letter-term in excess of one year. No definition available.
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| X | ||||||||||
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- Definition
Amount of required minimum rental payments maturing in the third fiscal year following the latest fiscal year for operating leases and airport guarantees having an initial or remaining non-cancelable letter-term in excess of one year. No definition available.
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| X | ||||||||||
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- Definition
Amount of required minimum rental payments maturing in the second fiscal year following the latest fiscal year for operating leases and airport guarantees having an initial or remaining non-cancelable letter-term in excess of one year. No definition available.
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| X | ||||||||||
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- Definition
Amount of required minimum rental payments maturing after the fifth fiscal year following the latest fiscal year for operating leases and airport guarantees having an initial or remaining non-cancelable letter-term in excess of one year. No definition available.
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| X | ||||||||||
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- Definition
Represents the rent expenses related to leases from governmental authorities. No definition available.
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