5. Composition of Certain Balance Sheet Accounts

Property and equipment as of September 30, 2017 and December 31, 2016 were as follows (in thousands):


	September 30,			December 31,
	2017			2016
Office equipment, furniture, fixtures and other	$	45,230		$	49,529
Leasehold improvements		42,413			42,143
Airborne equipment		702,414			557,196
Network equipment		186,650			168,121

		976,707			816,989
Accumulated depreciation		(362,396	)		(297,179	)

Property and equipment, net	$	614,311		$	519,810

Other non-current assets as of September 30, 2017 and December 31, 2016 were as follows (in thousands):


	September 30,		December 31,
	2017		2016
Deferred cost of equipment revenue	$	40,493	$	14,159
Deposits on satellite and airborne equipment		8,371		10,800
Other		9,644		3,129

Total other non-current assets	$	58,508	$	28,088

Accrued liabilities as of September 30, 2017 and December 31, 2016 were as follows (in thousands):


	September 30,		December 31,
	2017		2016
Employee compensation and benefits	$	23,831	$	21,008
Airborne equipment and installation costs		35,459		22,442
Airborne partner related accrued liabilities		16,226		14,307
Accrued interest		22,694		40,436
Other		50,054		33,862

Total accrued liabilities	$	148,264	$	132,055

Other non-current liabilities as of September 30, 2017 and December 31, 2016 were as follows (in thousands):


	September 30,		December 31,
	2017		2016
Deferred revenue	$	67,048	$	38,976
Deferred rent		37,101		36,538
Asset retirement obligations		9,935		8,527
Other		9,114		6,627

Total other non-current liabilities	$	123,198	$	90,668