Intangible Assets (Tables)

3 Months Ended

Mar. 31, 2018

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Intangible Assets, Other than Goodwill

Our intangible assets, other than goodwill, as of March 31, 2018 and December 31, 2017 were as follows (in thousands, except for weighted average remaining useful life):


	Weighted
	Average		As of March 31, 2018							As of December 31, 2017
	Remaining		Gross					Net		Gross					Net
	Useful Life		Carrying		Accumulated			Carrying		Carrying		Accumulated			Carrying
	(in years)		Amount		Amortization			Amount		Amount		Amortization			Amount
Amortized intangible assets:

Software		2.1	$	148,172	$	(98,916	)	$	49,256	$	145,063	$	(93,523	)	$	51,540
Service customer relationship		2.0		8,081		(6,042	)		2,039		8,081		(5,788	)		2,293
Other intangible assets		1.4		1,500		(1,200	)		300		1,500		(1,103	)		397
OEM and dealer relationships				6,724		(6,724	)		—		6,724		(6,724	)		—

Total amortized intangible assets				164,477		(112,882	)		51,595		161,368		(107,138	)		54,230

Unamortized intangible assets:

FCC Licenses				32,283		—			32,283		32,283		—			32,283

Total intangible assets			$	196,760	$	(112,882	)	$	83,878	$	193,651	$	(107,138	)	$	86,513

Summary of Amortization Expenses

Amortization expense for each of the next five years and thereafter is estimated to be as follows (in thousands):


	Amortization
Years ending December 31,	Expense
2018 (period from April 1 to December 31)	$	19,725
2019	$	17,093
2020	$	9,236
2021	$	3,337
2022	$	1,706
Thereafter	$	498