NOTE 8. INTANGIBLE ASSETS

Intangible assets consisted of the following (in thousands):

	June 30,
	2017			2016
Intangible assets
Customer contracts and related customer relationships	$	635,895		$	635,826
Acquired technologies		28,503			28,074
Covenants not to compete		3,305			3,321
Other		1,545			1,551
Intangible assets		669,248			668,772
Less accumulated amortization
Customer contracts and related customer relationships		(402,934	)		(363,412	)
Acquired technologies		(26,542	)		(25,693	)
Covenants not to compete		(3,288	)		(3,245	)
Other		(1,113	)		(1,050	)
Accumulated amortization		(433,877	)		(393,400	)
Total intangible assets, net	$	235,371		$	275,372

Intangible assets are primarily amortized on an accelerated basis over periods ranging from one to fifteen years. The weighted-average period of amortization for customer contracts and related customer relationships as of June 30, 2017 is 14.1 years, and the weighted-average remaining period of amortization is 11.2 years. The weighted-average period of amortization for acquired technologies as of June 30, 2017 is 9.5 years, and the weighted-average remaining period of amortization is 6.1 years.

Amortization expense for the years ended June 30, 2017, 2016 and 2015 was $40.7 million, $38.0 million and $39.5 million, respectively. Expected amortization expense for each of the fiscal years through June 30, 2022 and for years thereafter is as follows (in thousands):

	Amount
Year ending June 30, 2018	$	36,271
Year ending June 30, 2019		31,602
Year ending June 30, 2020		27,130
Year ending June 30, 2021		23,932
Year ending June 30, 2022		20,640
Thereafter		95,796
Total intangible assets, net	$	235,371