GOODWILL AND OTHER INTANGIBLE ASSETS

Other intangible assets and related accumulated amortization consists of the following at December 31:



	2018			2017
				As Adjusted
Gross carrying amount of acquisition intangibles:
Customer related intangibles	$	238,219		$	179,789
Acquired software	202,416			179,466
Trade names	16,905			11,435
Leases acquired	3,694			3,694
	461,234			374,384
Accumulated amortization	(184,382		)	(144,767		)
Total intangibles, net	$	276,852		$	229,617

Total amortization expense for intangibles was $39.6 million in 2018, $35.5 million (as adjusted) in 2017, and $35.9 million (as adjusted) during 2016.

The allocation of acquisition intangible assets is summarized in the following table:



	December 31, 2018					December 31, 2017
								As Adjusted
	Gross Carrying Amount		Weighted Average Amortization Period	Accumulated Amortization		Gross Carrying Amount		Weighted Average Amortization Period	Accumulated Amortization
Non-amortizable intangibles:
Goodwill	$	753,718	—	$	—	$	657,987	—	$	—
Amortizable intangibles:
Customer related intangibles	238,219		15 years	78,120		179,789		15 years	63,274
Acquired software	202,416		7 years	99,772		179,466		7 years	76,800
Trade names	16,905		11 years	5,139		11,435		11 years	3,768
Leases acquired	3,694		10 years	1,351		3,694		10 years	925

The changes in the carrying amount of goodwill for the two years ended December 31, 2018 are as follows:



	Enterprise Software		Appraisal and Tax		Total
Balance as of 12/31/2016	$	643,680	$	6,557	$	650,237
Goodwill acquired with acquisitions	7,750		—		7,750
Balance as of 12/31/2017	651,430		6,557		657,987
Goodwill acquired related to the purchase of Socrata	75,657		—		75,657
Goodwill acquired related to other acquisitions	20,074		—		20,074
Balance as of 12/31/2018	$	747,161	$	6,557	$	753,718

Estimated annual amortization expense related to acquired leases will be recorded as a reduction to hardware and other revenue and is expected to be $372,000 in 2019, $313,000 in 2020, $312,000 in 2021, $312,000 in 2022, $312,000 in 2023 and $723,000 thereafter. Estimated annual amortization expense related to acquisition intangibles, including acquired software, for which the amortization expense is recorded as cost of revenues, is as follows:



2019	$	40,222
2020	38,820
2021	38,463
2022	34,987
2023	16,990
Thereafter	105,028