Identified Intangible Assets and Goodwill, Net (Tables)

12 Months Ended

Dec. 31, 2012

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, 2012				December 31, 2011
			Carrying Amount		Accumulated Amortization		Carrying Amount		Accumulated Amortization
Amortized intangible assets:
Customer lists/relationships	5.5	years	$	14,378	$	10,319	$	12,627	$	9,570
Employment-related	3.9	years	5,430		5,082		5,345		4,573
Tradenames	6.4	years	4,528		3,267		4,358		2,783
Total			24,336		$	18,668	22,330		$	16,926
Less accumulated amortization			18,668				16,926
Identified intangibles, net			5,668				5,404
Unamortized intangible assets:
Goodwill	Not amortized		23,515				21,677
			$	29,183			$	27,081

Schedule of Goodwill [Table Text Block]

The changes in the carrying amounts of goodwill, by segment, for the year ended December 31, 2012 follow:

	Balance at January 1, 2012		Acquisitions		Translation and Other Adjustments		Balance at December 31, 2012
Utility Services	$	1,314	$	—	$	—	$	1,314
Residential and Commercial Services	18,616		1,812		18		20,446
All other	1,747		8		—		1,755
Total	$	21,677	$	1,820	$	18	$	23,515

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, 2012, in each of the next five years follows:

	Estimated Future Amortization Expense
Year ending December 31, 2013	$	1,611
2014	1,245
2015	892
2016	712
2017	515