GOODWILL AND OTHER INTANGIBLE ASSETS

Goodwill

During the three months ended March 31, 2018, we changed our operating segments, as discussed in note 4 “Change in Organizational Structure,” and, subsequently, our reporting units. We now have seven reporting units: US Colocation, US Cloud, US Network, INT Colocation, INT Cloud, INT Network, and Ubersmith. We allocated goodwill to our new reporting units using a relative fair value approach. In addition, we completed an assessment of any potential goodwill impairment for all reporting units immediately prior to and after the reallocation and determined that no impairment existed.

During the three months ended March 31, 2018, our goodwill activity is as follows (in thousands):



	December 31, 2017		Re-allocations			SingleHop Acquisition (note 5)		March 31, 2018
Operating segments:
INAP COLO	$	6,003	$	(6,003	)	$	—	$	—
INAP CLOUD	44,206		(44,206		)	—		—
INAP US	—		28,304			67,868		96,172
INAP INTL	—		21,905			—		21,905
Total	$	50,209	$	—		$	67,868	$	118,077

Other Intangible Assets

The components of our amortizing intangible assets, including capitalized software, are as follows (in thousands):



	March 31, 2018					December 31, 2017
	Gross Carrying Amount		AccumulatedAmortization			Gross Carrying Amount		AccumulatedAmortization
Acquired and developed technology	$	68,269	$	(48,766	)	$	52,825	$	(48,063	)
Customer relationships, trade names and noncompete	110,850		(51,168		)	71,116		(50,212		)
	$	179,119	$	(99,934	)	$	123,941	$	(98,275	)

During the three months ended March 31, 2018 and 2017, amortization expense for intangible assets was $1.7 million and $1.1 million, respectively. As of March 31, 2018, remaining amortization expenses is as follows (in thousands):



Nine months remaining in 2018	$	8,636
2019	10,941
2020	10,031
2021	9,548
2022	7,839
Thereafter	32,190
	$	79,185