Intangible Assets (Tables)

3 Months Ended

Mar. 31, 2013

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Indefinite-lived Intangible Assets by Segment [Table Text Block]

Indefinite-lived Intangible Assets:

Indefinite-lived intangible assets primarily consist of goodwill and use rights. Use rights of $0.4 million are included in other noncurrent assets on our condensed consolidated balance sheets as of March 31, 2013, December 31, 2012 and March 31, 2012.

Schedule of Goodwill [Table Text Block]

The following table presents the goodwill balance by reporting segment:

(in thousands)	March 31, 2013		December 31, 2012		March 31, 2012
Construction	$	28,297	$	29,190	$	6,936
Large Project Construction	23,182		24,115		850
Construction Materials	2,114		2,114		2,114
Total goodwill	$	53,593	$	55,419	$	9,900

Schedule of Finite-Lived Intangible Assets by Major Class

Amortized Intangible Assets:

Following is the breakdown of our amortized intangible assets that are included in other noncurrent assets on our condensed consolidated balance sheets:

March 31, 2013			Accumulated
(in thousands)	Gross Value		Amortization			Net Book Value
Permits	$	29,713	$	(11,149	)	$	18,564
Customer lists	4,398		(2,271		)	2,127
Covenants not to compete	1,588		(1,549		)	39
Acquired backlog	7,900		(1,707		)	6,193
Trade name	4,100		(108		)	3,992
Other	871		(767		)	104
Total amortized intangible assets	$	48,570	$	(17,551	)	$	31,019

December 31, 2012			Accumulated
(in thousands)	Gross Value		Amortization			Net Book Value
Permits	$	29,713	$	(10,869	)	$	18,844
Customer lists	4,698		(2,170		)	2,528
Covenants not to compete	1,588		(1,546		)	42
Acquired backlog	8,400		—			8,400
Trade name	4,100		—			4,100
Other	871		(734		)	137
Total amortized intangible assets	$	49,370	$	(15,319	)	$	34,051

March 31, 2012			Accumulated
(in thousands)	Gross Value		Amortization			Net Book Value
Permits	$	29,713	$	(8,589	)	$	21,124
Customer lists	2,198		(2,000		)	198
Covenants not to compete	1,588		(1,510		)	78
Other	871		(621		)	250
Total amortized intangible assets	$	34,370	$	(12,720	)	$	21,650