Software and Other Intangible Assets

3 Months Ended

Mar. 31, 2019

Goodwill and Intangible Assets Disclosure [Abstract]

6. Software and Other Intangible Assets

As of March 31, 2019, software net book value totaled $130.8 million, net of $261.1 million of accumulated amortization. Included in this net book value amount is software for resale of $24.8 million and software acquired or developed for internal use of $106.0 million.

As of December 31, 2018, software net book value totaled $137.2 million, net of $252.2 million of accumulated amortization. Included in this net book value amount is software for resale of $27.5 million and software acquired or developed for internal use of $109.7 million.

Amortization of software for resale is computed using the greater of (a) the ratio of current revenues to total current and future revenues expected to be derived from the software or (b) the straight-line method over an estimated useful life of generally three to ten years. Software for resale amortization expense recorded during the three months ended March 31, 2019 and 2018, totaled $3.0 million and $3.6 million, respectively. These software amortization expense amounts are reflected in cost of revenue in the condensed consolidated statements of operations.

Amortization of software for internal use is computed using the straight-line method over an estimated useful life of generally three to ten years. Software for internal use amortization expense recorded during the three months ended March 31, 2019 and 2018, totaled $10.4 million and $10.5 million, respectively. These software amortization expense amounts are reflected in depreciation and amortization in the condensed consolidated statements of operations.

The carrying amount and accumulated amortization of the Company’s other intangible assets subject to amortization at each balance sheet date are as follows (in thousands):

	March 31, 2019							December 31, 2018
	Gross Carrying Amount		Accumulated Amortization			Net Balance		Gross Carrying Amount		Accumulated Amortization			Net Balance
Customer relationships	$	298,459	$	(136,628	)	$	161,831	$	297,991	$	(131,187	)	$	166,804
Trademarks and tradenames		16,346		(15,332	)		1,014		16,348		(15,025	)		1,323
	$	314,805	$	(151,960	)	$	162,845	$	314,339	$	(146,212	)	$	168,127

Other intangible assets amortization expense during the three months ended March 31, 2019 and 2018, totaled $5.5 million and $4.9 million, respectively

Based on capitalized intangible assets as of March

2019

, estimated amortization expense amounts in future fiscal years are as follows (in thousands):

Fiscal Year Ending December 31,	Software Amortization		Other Intangible Assets Amortization
Remainder of 2019	$	37,383	$	16,340
2020		40,353		20,992
2021		27,637		20,506
2022		13,167		20,359
2023		6,633		20,053
Thereafter		5,639		64,595
Total	$	130,812	$	162,845