Leases (Tables)

12 Months Ended

Dec. 31, 2017

Schedule of Future Minimum Lease Payments Required under Finance Leases

As of December 31, 2017, the scheduled future minimum lease payments required under finance leases are as follows:


	Future minimum lease payments		Interest		Present value of minimum lease payments
Up to one year	$	46,274	$	16,180	$	45,416
One to five years		186,344		54,830		169,383
Over five years		388,005		26,924		310,388

Total minimum lease payments	$	620,623	$	97,934	$	525,187

As of December 31, 2016, the scheduled future minimum lease payments required under finance leases are as follows:


	Future minimum lease payments		Interest		Present value of minimum lease payments
Up to one year	$	39,016	$	14,524	$	38,407
One to five years		152,880		48,979		139,322
Over five years		366,131		32,727		288,638

Total minimum lease payments	$	558,027	$	96,230	$	466,367

Schedule of Future Minimum Lease Payments Required under Aircraft and Non-aircraft Operating Leases

As of December 31, 2017, the scheduled future minimum lease payments required under aircraft and non-aircraft operating leases that have initial non-cancellable lease terms in excess of one year are as follows:


	Aircraft		Others
Up to one year	$	111,568	$	14,988
One to five years		270,310		74,943
More than five years		18,957		17,509

Total minimum lease payments	$	400,835	$	107,440

Schedule of Future Minimum Lease Receivables under Non-cancellable Leases

As of December 31, 2017, future minimum lease receivables under non-cancellable leases are as follows:


	2017		2016
Up to one year	$	3,480	$	3,480
One to five years		5,075		8,555

Total minimum lease rental payments	$	8,555	$	12,035