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):

	2015		2014
Leasing commissions and other in-place lease intangibles	$	613,518	$	241,557
Rent leveling and above market leases		276,315		224,589
Prepaid assets		107,000		105,093
Fixed assets		94,178		86,927
Accounts receivable		89,611		103,445
Value added taxes receivable		86,115		86,331
Derivative assets		53,579		106,664
Management contracts		46,293		52,896
Other notes receivable		41,262		46,570
Deferred income taxes		14,650		7,887
Other		91,989		94,328
Totals	$	1,514,510	$	1,156,287

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

	2015		2014
Tenant security deposits	$	190,160	$	169,326
Income tax liabilities		81,125		85,200
Unearned rents		77,730		74,873
Below market leases		55,976		30,651
Deferred income		29,197		16,326
Environmental liabilities		21,484		10,878
Derivative liabilities		13,729		52,740
Value added taxes payable		10,272		13,358
Other		154,702		173,074
Totals	$	634,375	$	626,426

The expected future amortization of leasing commissions and other in-place lease intangibles into amortization expense of $613.5 million is summarized in the table below. We also expect our above and below market leases and rent leveling net assets, which total a net $220.3 million at December 31, 2015, to be amortized into rental revenue as follows (in thousands):

	Amortization Expense		Net (Increase) Decrease to Rental Revenue
2016	$	157,914	$	(15,421	)
2017		116,958		17,381
2018		82,876		25,903
2019		61,672		28,096
2020		46,599		28,103
Thereafter		147,499		136,277
Totals	$	613,518	$	220,339