NOTE 8. OTHER ASSETS AND OTHER LIABILITIES

The following table summarizes our other assets, net of amortization and depreciation, if applicable, at December 31 (in thousands):

	2016		2015
Leasing commissions	$	286,821	$	229,645
Rent leveling		285,824		226,239
Acquired lease intangibles		267,907		433,949
Prepaid assets		120,361		107,000
Accounts receivable		110,918		89,611
Fixed assets		102,830		94,178
Value added taxes receivable		94,713		86,115
Derivative assets		47,114		53,579
Management contracts		41,993		46,293
Other notes receivable		35,824		41,262
Deferred income taxes		14,052		14,650
Other		88,633		91,989
Totals	$	1,496,990	$	1,514,510

The following table summarizes our other liabilities, net of amortization, if applicable, at December 31 (in thousands):

	2016		2015
Tenant security deposits	$	206,301	$	190,160
Unearned rents		90,233		77,730
Income tax liabilities		68,666		81,125
Acquired lease intangibles		31,707		55,976
Environmental liabilities		24,572		21,484
Deferred income		21,629		29,197
Value added taxes payable		15,888		10,272
Derivative liabilities		1,268		13,729
Other		167,055		154,702
Totals	$	627,319	$	634,375

The following table summarizes the expected future amortization of leasing commissions and foregone rent into amortization expense and above and below market leases and rent leveling net assets into rental revenues, all based on the balances at December 31, 2016 (in thousands):

	Amortization Expense		Net (Increase) Decrease to Rental Revenues
2017	$	135,263	$	(24,939	)
2018		98,435		25,795
2019		76,315		40,306
2020		59,969		46,465
2021		44,137		41,831
Thereafter		106,325		158,943
Totals	$	520,444	$	288,401