Goodwill, Customer Relationships and Trademarks (Tables)

12 Months Ended

Dec. 31, 2017

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Goodwill and Intangible Assets

Goodwill, customer relationships and trademarks consist of the following amounts as of (in thousands):




	December 31, 2017			December 31, 2016
Goodwill	$	120,154		$	79,147
Customer Relationships— Acquired ⁽¹⁾
Cost	$	93,371		$	63,571
Accumulated amortization	(46,681		)	(31,660		)
Customer Relationships—Acquired, net	$	46,690		$	31,911
Customer Relationships— Other⁽²⁾
Cost	$	12,336		$	4,320
Accumulated amortization	(5,534		)	(2,708		)
Customer Relationships—Other, net	$	6,802		$	1,612
Trademarks⁽³⁾
Cost	$	9,770		$	6,770
Accumulated amortization	(1,212		)	(431		)
Trademarks, net	$	8,558		$	6,339


(1)	Customer relationships—Acquired represent those customer acquisitions accounted for under the acquisition method in accordance with ASC 805. See Note 3 "Acquisitions" for further discussion.


(2)	Customer relationships—Other represent portfolios of customer contracts not accounted for in accordance with ASC 805 as these acquisitions were not in conjunction with the acquisition of businesses. See Note 16 "Customer Acquisitions" for further discussion.

(3)

Trademarks reflect values associated with the recognition and positive reputation of acquired businesses accounted for as part of the acquisition method in accordance with ASC 805 through the acquisitions of CenStar, Oasis, the Provider Companies, the Major Energy Companies and the Verde Companies. These trademarks are recorded as other assets in the consolidated balance sheets. See Note 3 "Acquisitions" for further discussion.

Changes in goodwill, customer relationships and trademarks consisted of the following (in thousands):



	Goodwill⁽¹⁾		Customer Relationships— Acquired & Non-Compete Agreements			Customer Relationships— Other			Trademarks
Balance at December 31, 2014	$	—	$	—		$	1,501		$	—
Additions	$	—	$	—		$	2,731		$	—
Acquisition of CenStar	6,396		5,494			—			651
Acquisition of Oasis	11,983		9,389			—			617
Amortization expense	—		(4,503		)	(1,183		)	(74		)
Balance at December 31, 2015	$	18,379	$	10,380		$	3,049		$	1,194
Additions	$	—	$	—		$	—		$	—
Acquisition of Provider Companies	26,040		24,417			—			529
Acquisition of Major Energy Companies	34,728		24,271			—			4,973
Amortization expense	—		(27,157		)	(1,437		)	(357		)
Balance at December 31, 2016	$	79,147	$	31,911		$	1,612		$	6,339
Additions (Major Working Capital Adjustment)	$	260	$	—		$	—		$	—
Acquisition of Perigee	1,540		1,100			—			—
Acquisition of Verde	39,207		28,700			—			3,000
Additions (Other) ⁽²⁾	—		—			8,016			—
Amortization expense	—		(15,021		)	(2,826		)	(781		)
Balance at December 31, 2017	$	120,154	$	46,690		$	6,802		$	8,558

(1) Changes in goodwill for the year ended December 31, 2017 include NG&E's working capital settlement with the Major Energy Companies' sellers of $0.3 million, Perigee's goodwill of $1.5 million, and the Verde Companies' goodwill of $39.2 million.

(2) Includes $8.0 million related to customer contract purchases for the year ended December 31, 2017.

Estimated Future Amortization Expense of Intangible Assets

Estimated future amortization expense for customer relationships and trademarks at December 31, 2017 is as follows (in thousands):



Year Ending December 31,
2018	$	19,469
2019	14,894
2020	10,474
2021	8,912
2022	4,700
> 5 years	3,601
Total	$	62,050