Identified Intangible Assets and Goodwill, Net (Tables)

12 Months Ended

Dec. 31, 2016

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of acquired finite-lived intangible assets by major class [Table Text Block]

The carrying amount of the identified intangibles and goodwill acquired in connection with our investments in businesses were as follows:

	Weighted-Average Amortization Period (Years)		December 31, 2016				December 31, 2015
			Carrying Amount		Accumulated Amortization		Carrying Amount		Accumulated Amortization
Amortized intangible assets:
Customer lists/relationships	2.6	years	$	17,822	$	15,171	$	16,805	$	13,764
Employment-related	2.6	years	7,032		6,386		6,811		6,008
Tradenames	2.6	years	5,634		4,860		5,502		4,539
Total			30,488		$	26,417	29,118		$	24,311
Less accumulated amortization			26,417				24,311
Identified intangibles, net			4,071				4,807
Unamortized intangible assets:
Goodwill	Not amortized		30,305				29,474
			$	34,376			$	34,281

Schedule of goodwill [Table Text Block]

The changes in the carrying amounts of goodwill, by segment, for the year ended December 31, 2016 follow:

	Balance at January 1, 2016		Acquisitions		Translation and Other Adjustments		Balance at December 31, 2016
Utility	$	3,424	$	—	$	—	$	3,424
Residential and Commercial	26,050		817		14		26,881
Total	$	29,474	$	817	$	14	$	30,305

Schedule of finite-lived intangible assets, future amortization expense [Table Text Block]

Estimated future aggregate amortization expense of intangible assets--The estimated aggregate amortization expense of intangible assets, as of December 31, 2016, in each of the next five years follows:

	Estimated Future Amortization Expense
Year ending December 31, 2017	$	1,705
2018	885
2019	664
2020	512
2021	232