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Intangible Assets (Tables)
 6 Months Ended
Jun. 30, 2011
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of Indefinite-lived Intangible Assets by Segment [Table Text Block]
Indefinite-lived Intangible Assets:
(in thousands)
 
June 30,

2011
 
December 31,

2010
 
June 30,

2010
Goodwill1
 
$
9,900


 
$
9,900


 
$
9,900


Use rights and other
 
1,319


 
1,319


 
1,319


Total unamortized intangible assets
 
$
11,219


 
$
11,219


 
$
11,219


1Goodwill for all periods presented primarily relates to our Construction segment.
Schedule of Finite-Lived Intangible Assets by Major Class
Amortized Intangible Assets:
June 30, 2011
 
 
 
Accumulated
 
 
(in thousands)
 
Gross Value
 
Amortization
 
Net Value
Permits
 
$
29,713


 
$
(6,837
)
 
$
22,876


Customer lists
 
2,198


 
(1,828
)
 
370


Covenants not to compete
 
1,588


 
(1,401
)
 
187


Other
 
871


 
(508
)
 
363


Total amortized intangible assets
 
$
34,370


 
$
(10,574
)
 
$
23,796


December 31, 2010
 
 
 
 
 
 
(in thousands)
 
 
 
 
 
 
Permits
 
$
29,713


 
$
(6,100
)
 
$
23,613


Customer lists
 
2,198


 
(1,715
)
 
483


Covenants not to compete
 
1,588


 
(1,325
)
 
263


Other
 
871


 
(432
)
 
439


Total amortized intangible assets
 
$
34,370


 
$
(9,572
)
 
$
24,798


June 30, 2010
 
 
 
 
 
 
(in thousands)
 
 
 
 
 
 
Permits
 
$
33,582


 
$
(5,984
)
 
$
27,598


Customer lists
 
2,198


 
(1,601
)
 
597


Covenants not to compete
 
1,588


 
(1,247
)
 
341


Other
 
1,082


 
(567
)
 
515


Total amortized intangible assets
 
$
38,450


 
$
(9,399
)
 
$
29,051