Commitments and contingencies (Tables)

12 Months Ended

Dec. 31, 2012

Commitments and contingencies

Schedule of future minimum lease obligations under non-cancellable operating and capital leases

Years ended December 31,	Capital Leases		Operating Leases and Airport Guarantees
2013	$	42	$	7,409
2014		42		6,068
2015		42		4,985
2016		52		4,860
2017		—		4,727
Thereafter		—		21,602
Minimum lease payments	$	178	$	49,651
Current portion	$	42
Non-current portion	$	136