ACQUIRED INTANGIBLE ASSETS, NET

Below is a summary of the major acquired intangible assets (in thousands):



	As of and for the year ended December 31, 2016
	Total Cost		Accumulated Amortization			Foreign Currency Translation Adjustment			Impairment			Acquired Intangible Assets, Net
Technology	$	10,308	$	(9,677	)	$	(631	)	$	—		$	—
Trademarks and brand names—Dice	39,000		—			—			—			39,000
Trademarks and brand names—Other	23,194		(14,379		)	(2,286		)	(3,168		)	3,361
Customer lists	28,473		(13,518		)	(2,112		)	(6,084		)	6,759
Candidate and content database	15,918		(15,295		)	(623		)	—			—
Acquired intangible assets, net	$	116,893	$	(52,869	)	$	(5,652	)	$	(9,252	)	$	49,120



	As of and for the year ended December 31, 2015
	Total Cost		Accumulated Amortization			Foreign Currency Translation Adjustment			Acquired Intangible Assets, Net
Technology	$	10,308	$	(8,831	)	$	(615	)	$	862
Trademarks and brand names—Dice	39,000		—			—			39,000
Trademarks and brand names—Other	23,419		(13,156		)	(2,238		)	8,025
Customer lists	63,373		(42,808		)	(5,068		)	15,497
Candidate and content database	24,888		(22,088		)	(892		)	1,908
Acquired intangible assets, net	$	160,988	$	(86,883	)	$	(8,813	)	$	65,292

During the second quarter of 2016, the Company retired $44.1 million of fully amortized acquired intangible assets.

During the quarter ended September 30, 2016, the long-lived assets of the Energy reporting unit were tested for recoverability due to the downturn in the current and expected future financial performance of the reporting unit. The Company recorded an impairment of unamortized intangible assets of $9.3 million as of September 30, 2016.

Based on the carrying value of the acquired finite-lived intangible assets recorded as of December 31, 2016, and assuming no subsequent impairment of the underlying assets, the estimated future amortization expense is as follows (in thousands):



2017	$	2,188
2018	1,781
2019	1,476
2020	1,421
2021	1,149
2022 and thereafter	2,105
Total	$	10,120

Indefinite Life on Trade Name

The Dice.com trademarks and brand name is one of the most recognized names of online recruiting and career development. Since Dice’s inception in 1991, the brand has been recognized as a leader in recruiting and career development services for technology and engineering professionals. Currently, the brand is synonymous with the most specialized online marketplace for technology industry-specific talent. The brand has significant online and offline presence in online recruiting and career development services. Considering the recognition of the brand, its long history, awareness in the talent acquisition and staffing services market, and the intended use, the remaining useful life of the Dice.com trademarks and brand name was determined to be indefinite.