Intangible Assets (Tables)

9 Months Ended

Sep. 30, 2014

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 September 30, 2014, December 31, 2013 and September 30, 2013.

Schedule of Goodwill [Table Text Block]

The following table presents the goodwill balance by reporting segment (in thousands):

	September 30, 2014		December 31, 2013		September 30, 2013
Construction	$	29,260	$	29,260	$	28,398
Large Project Construction	22,593		22,593		23,287
Construction Materials	1,946		1,946		2,114
Total goodwill	$	53,799	$	53,799	$	53,799

Schedule of Finite-Lived Intangible Assets by Major Class

Amortized Intangible Assets

The detail of our amortized intangible assets that are included in other noncurrent assets on our condensed consolidated balance sheets is as follows (in thousands):

			Accumulated
September 30, 2014	Gross Value		Amortization			Net Book Value
Permits	$	29,713	$	(12,835	)	$	16,878
Acquired backlog	7,900		(7,226		)	674
Customer lists	4,398		(2,711		)	1,687
Trade name	4,100		(755		)	3,345
Covenants not to compete and other	2,459		(2,426		)	33
Total amortized intangible assets	$	48,570	$	(25,953	)	$	22,617

			Accumulated
December 31, 2013	Gross Value		Amortization			Net Book Value
Permits	$	29,713	$	(11,992	)	$	17,721
Acquired backlog	7,900		(6,835		)	1,065
Customer lists	4,398		(2,491		)	1,907
Trade name	4,100		(432		)	3,668
Covenants not to compete and other	2,459		(2,408		)	51
Total amortized intangible assets	$	48,570	$	(24,158	)	$	24,412

			Accumulated
September 30, 2013	Gross Value		Amortization			Net Book Value
Permits	$	29,713	$	(11,711	)	$	18,002
Acquired backlog	7,900		(5,147		)	2,753
Customer lists	4,398		(2,418		)	1,980
Trade name	4,100		(324		)	3,776
Covenants not to compete and other	2,459		(2,378		)	81
Total amortized intangible assets	$	48,570	$	(21,978	)	$	26,592