Goodwill and other intangibles (Tables)

12 Months Ended

Dec. 31, 2015

Goodwill and Intangible Assets Disclosure [Abstract]

Summary of the Activity in the Companys Goodwill

The activity in the Company’s goodwill as of December 31 was as follows:


	2015		2014
Balance at beginning of year	$	23,546	$	—
Acquisitions		17,920		23,546

Balance at end of year	$	41,466	$	23,546

Summary of the Amortization Expense

Amortization expense was classified as follows in the Company’s consolidated statements of operations for the years ended December 31:


	2015		2014		2013
Cost of sales	$	742	$	1,134	$	40
Operating expenses		4,582		1,013		—

	$	5,324	$	2,147	$	40

Schedule of Other Intangible Assets

The tables below shows the amortization period and intangible asset cost by intangible asset as of December 31, 2015 and December 31, 2014 and the accumulated amortization and net intangible asset value in total for all those intangible assets that related to the Company’s acquisitions, for the related period. Refer to Note 3, “Acquisitions” for a further discussion of these acquisitions.


			2015
Description of intangible	Amortization period		Gross amount		Accumulated amortization			Net amount
Backlog		18 months	$	1,800	$	(1,800	)	$	—
Customer relationships		13 years		34,940		(5,129	)		29,811
Developed technology		7 years		700		(113	)		587
Trade names and trademarks		13 years		1,700		(353	)		1,347

Total			$	39,140	$	(7,395	)	$	31,745


			2014
Description of intangible	Amortization period		Gross amount		Accumulated amortization			Net amount
Backlog		18 months	$	1,200	$	(1,095	)	$	105
Customer relationships		13 years		20,600		(926	)		19,674
Trade names and trademarks		13 years		1,700		(87	)		1,613

Total			$	23,500	$	(2,108	)	$	21,392

Schedule of Estimated Future Amortization Expense for Intangible Assets

The table below shows the estimated future amortization expense for intangible assets:


Year	Estimated amortization expense
2016	$	5,714
2017		4,837
2018		4,182
2019		3,638
2020		3,053
Thereafter		10,321

Total	$	31,745