(8) INTANGIBLE ASSETS, NET

Intangible assets, net consisted of the following (in thousands):



		June 30,
	Useful Life	2018			2017
Member relationships	14.7 years	$	220,100		$	220,100
Technology	5.0 years	142,317			143,727
Customer relationships	8.3 years	48,120			48,120
Trade names	8.3 years	22,710			22,710
Distribution network	10.0 years	22,400			22,400
Favorable lease commitments	10.1 years	11,393			11,393
Non-compete agreements	5.9 years	8,710			8,710
Total intangible assets		475,750			477,160
Accumulated amortization		(153,635		)	(99,198		)
Total intangible assets, net		$	322,115		$	377,962

Intangible asset amortization totaled $55.4 million, $48.3 million and $33.1 million for the years ended June 30, 2018, 2017 and 2016, respectively.

The estimated aggregate amortization expense for each of the next five fiscal years and thereafter is as follows (in thousands):



2019	$	53,941
2020	49,077
2021	27,953
2022	24,964
2023	23,890
Thereafter	139,290
Total amortization expense^(a)	$	319,115


(a)	Estimated aggregate amortization expense for the next five fiscal years and thereafter excludes amortization on technology under development, which was classified as technology in the total intangible assets, net table, of $3.0 million at June 30, 2018.

The net carrying value of intangible assets by segment was as follows (in thousands):