Other Intangible Assets

6 Months Ended

Jun. 30, 2019

Goodwill and Intangible Assets Disclosure [Abstract]

Other Intangible Assets

Note 7 Other Intangible Assets

Other intangible assets (in thousands):

		June 30, 2019						December 31, 2018
		Gross Amount		Accumulated Amortization		Net		Gross Amount		Accumulated Amortization		Net
Amortizing intangible assets:
	Customer relationships	$	41,155	$	31,358	$	9,797	$	30,993	$	30,993	$	—
	Developed technology	29,934		24,710		5,224		24,446		24,446		—
	Patents, trademarks and tradenames	10,471		3,879		6,592		3,765		3,765		—
	Service contracts	5,454		5,451		3		5,538		5,512		26
	Total	$	87,014	$	65,398	$	21,616	$	64,742	$	64,716	$	26

Amortization expense related to other intangible assets during the quarters ended June 30, 2019, and June 30, 2018, was $1.1 million and $0.1 million, respectively. Amortization expense related to other intangible assets during the six months ended June 30, 2019, and June 30, 2018, was $2.1 million and $0.2 million, respectively.

Estimated future amortization of other intangible assets (in thousands):

	Future Amortization
2019 (Excluding the six months ended June 30, 2019)	$	2,266
2020	4,526
2021	4,526
2022	2,641
2023	1,145
Thereafter	6,512
	$	21,616

See Note 5Acquisitions for details on our acquisitions. No impairments of other intangible assets were recognized in either of the six months ended June 30, 2019 or 2018.