GOODWILL AND OTHER INTANGIBLE ASSETS (Tables)

6 Months Ended

Jun. 30, 2011

GOODWILL AND OTHER INTANGIBLE ASSETS

Schedule of changes to goodwill

	2011
Balance at January 1, 2011	$	60,252
Acquired from acquisitions	27,062
Foreign currency translation	1,197
Balance at June 30, 2011	$	88,511

Summary of amortizable other intangible assets

	June 30, 2011							December 31, 2010
	Cost		Accumulated Amortization		Net		Weighted Average Amortization Period (in years)	Cost		Accumulated Amortization		Net		Weighted Average Amortization Period (in years)
Permits	$	105,748	$	44,464	$	61,284	17.7	$	103,493	$	42,430	$	61,063	15.9
Customer relationships	69,781		14,008		55,773		7.0	58,322		10,418		47,904		8.0
Other intangible assets	18,574		8,563		10,011		4.1	13,218		7,785		5,433		3.5
	$	194,103	$	67,035	$	127,068	9.4	$	175,033	$	60,633	$	114,400	9.7

Total amounts assigned and the weighted average amortization period, by major intangible asset classes, related to the Peak acquisition

	Total Amount Assigned		Weighted Average Amortization Period (in years)
Customer relationships	$	10,020	5.3
Other intangibles	4,258		6.0
	$	14,278	5.0

Schedule of expected amortization for the net carrying amount of finite lived intangible assets

Years Ending December 31,	Expected Amortization
2011 (six months)	$	8,607
2012	14,076
2013	13,246
2014	12,597
2015	12,047
Thereafter	66,495
	$	127,068