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Note 4 - Goodwill and Intangible Assets (Tables)
 3 Months Ended
Mar. 31, 2014
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of Goodwill
Goodwill
(In millions)
 
Energy and
Mining
 
Water and
Wastewater
 
Commercial
and Structural
 
Total
Beginning balance at January 1, 2014
$
138.6

 
$
130.1

 
$
65.5

 
$
334.2

Foreign currency translation
(0.5
)
 
—

 
—

 
(0.5
)
Balance at March 31, 2014 (1)
$
138.1

 
$
130.1

 
$
65.5

 
$
333.7

__________________________
(1) 
The Company does not have any accumulated impairment charges.
Schedule of Finite-Lived Intangible Assets
Identified Intangible Assets
(In thousands)
 
 
March 31, 2014
 
December 31, 2013
 
Weighted Average Useful Lives (Years)
 
Gross Carrying Amount
 
Accumulated Amortization
 
Net Carrying Amount
 
Gross Carrying Amount
 
Accumulated Amortization
 
Net Carrying Amount
License agreements
6
 
$
3,913

 
$
(3,013
)
 
$
900

 
$
3,917

 
$
(2,977
)
 
$
940

Backlog
0
 
4,739

 
(4,739
)
 
—

 
4,745

 
(4,745
)
 
—

Leases
13
 
2,067

 
(514
)
 
1,553

 
2,067

 
(477
)
 
1,590

Trademarks
16
 
21,476

 
(4,424
)
 
17,052

 
21,394

 
(4,167
)
 
17,227

Non-competes
4
 
1,140

 
(775
)
 
365

 
1,140

 
(753
)
 
387

Customer relationships
14
 
182,643

 
(30,927
)
 
151,716

 
182,703

 
(28,287
)
 
154,416

Patents and acquired technology
17
 
58,013

 
(23,109
)
 
34,904

 
57,419

 
(22,696
)
 
34,723

 
 
 
$
273,991

 
$
(67,501
)
 
$
206,490

 
$
273,385

 
$
(64,102
)
 
$
209,283
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense
Estimated amortization expense by year is as follows (in thousands):
2014
 
$
14,436

2015
 
14,627

2016
 
14,624

2017
 
14,587

2018
 
14,509