(5) Other Intangible Assets

Other intangible assets were comprised of the following as of December 31, 2017 and June 30, 2017 (in thousands):


	December 31, 2017		June 30, 2017
Developed/core product technology	$	208,445	$	206,258
Accumulated amortization		(108,715)		(93,079)
Developed/core product technology, net		99,730		113,179
Trade names		48,880		48,768
Accumulated amortization		(13,976)		(10,894)
Trade names, net		34,904		37,874
Non-compete agreements		3,688		3,660
Accumulated amortization		(2,490)		(2,236)
Non-compete agreements, net		1,198		1,424
Customer relationships		123,957		122,458
Accumulated amortization		(47,465)		(40,050)
Customer relationships, net		76,492		82,408
In-process research and development		4,100		4,100
Accumulated amortization		-		-
In-process research and development, net		4,100		4,100
Patents		92,116		85,780
Accumulated amortization		(68,513)		(62,965)
Patents, net		23,603		22,815
Total other intangibles, net	$	240,027	$	261,800

Intangible assets consist of developed/core product technology, trade names, non-compete agreements, customer relationships, and patents, which we amortize over the estimated useful life of the assets, generally between two and fifteen years. There are no expected residual values related to these intangible assets. In-process research and development is amortized over the estimated useful life of the assets, once the research and development efforts are completed. At least on an annual basis, we evaluate the in-process research and development balances for impairment.