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):

	2017		2016
Rent leveling	$	311,932	$	285,824
Leasing commissions		306,461		286,821
Acquired lease intangibles		202,087		267,907
Fixed assets		109,823		102,830
Prepaid assets		102,179		120,361
Accounts receivable		85,118		110,918
Value added taxes receivable		84,339		94,713
Other notes receivable		35,406		35,824
Derivative assets		19,139		47,114
Management contracts		17,608		41,993
Deferred income taxes		13,533		14,052
Other		94,338		88,633
Total	$	1,381,963	$	1,496,990

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

	2017		2016
Tenant security deposits	$	209,741	$	206,301
Unearned rents		71,392		90,233
Income tax liabilities		56,988		68,666
Indemnification liability		39,480		32,843
Derivative liabilities		32,229		1,268
Environmental liabilities		25,728		24,572
Acquired lease intangibles		24,769		31,707
Deferred income		15,754		21,629
Value added taxes payable		10,081		15,888
Other		173,737		134,212
Total	$	659,899	$	627,319

The following table summarizes the expected future amortization of leasing commissions and forgone rent (included in acquired lease intangibles) into amortization expense and above and below market leases (included in acquired lease intangibles) and rent leveling net assets into rental revenues, all based on the balances at December 31, 2017 (in thousands):

	Amortization Expense		Net (Increase) Decrease to Rental Revenues
2018	$	107,897	$	(13,862	)
2019		90,168		25,635
2020		73,790		42,140
2021		56,494		46,332
2022		41,689		41,855
Thereafter		98,233		185,340
Total	$	468,271	$	327,440