Goodwill and Other Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2017

Goodwill and Intangible Assets Disclosure [Abstract]

Changes in the Company’s goodwill balance for each of the two years in the period ended December 31, 2017 are summarized in the table below (in thousands):



Balance at December 31, 2015	47,422
Acquired in business combinations	25,037
Divestiture of business	(3,775		)
Adjustment due to prior year business combinations	57
Foreign currency translation adjustment	356
Balance at December 31, 2016	$	69,097
Acquired in business combinations	88,819
Adjustment due to prior year business combinations	17
Adjustment due to finalization of 2017 business combinations	(4,232		)
Foreign currency translation adjustment	906
Balance at December 31, 2017	$	154,607

Schedule of Finite-Lived Intangible Assets

The following is a summary of the Company’s intangible assets, net (in thousands):



	Estimated Useful Life (Years)	Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount
December 31, 2017
Customer relationships	5-10	$	69,061	$	18,040	$	51,021
Trade name	1.5	3,431		2,900		531
Developed technology	4-7	29,308		10,817		18,491
Total intangible assets		$	101,800	$	31,757	$	70,043



	Estimated Useful Life (Years)	Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount
December 31, 2016
Customer relationships	1-10	$	32,703	$	12,418	$	20,285
Trade name	1.5-3	2,636		2,462		174
Developed technology	4-7	15,228		7,175		8,053
Total intangible assets		$	50,567	$	22,055	$	28,512

Schedule of Weighted-Average Amortization Period

The following table summarizes the Company’s weighted-average amortization period, in total and by major finite-lived intangible asset class, by acquisition during the year ended December 31 (in years):



	2017	2016
Customer relationships	9.0	9.3
Trade name	1.5	2.8
Developed technology	6.4	6.3
Total weighted-average amortization period	8.2	8.0

Schedule of Finite-Lived Intangible Assets, Future Amortization Expense

Estimated annual amortization expense for the next five years and thereafter is as follows (in thousands):



	Amortization Expense
Year ending December 31:
2018	12,847
2019	11,668
2020	10,605
2021	10,209
2022 and thereafter	24,714
Total	$	70,043