Represents the increase (decrease) in goodwill due to reorganization of the reporting entity.

No definition available.

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- Definition

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=14024403&loc=d3e13816-109267

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 45

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination.

+ References

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of accumulated impairment loss for an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of increase (decrease) from adjustments after acquisition date under purchase accounting of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (g)

-URI http://asc.fasb.org/extlink&oid=14024403&loc=d3e13816-109267

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 10

-Section 25

-Paragraph 16

-URI http://asc.fasb.org/extlink&oid=21917927&loc=d3e961-128460

+ Details

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- Details

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- Details

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- Details

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- Details

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Goodwill And Other Intangible Assets (Carrying Amount of Goodwill) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Goodwill
Balance at beginning of period	$ 577,756us-gaap_Goodwill	$ 570,646us-gaap_Goodwill		$ 1,058,631us-gaap_Goodwill
Accumulated Impairment			(487,985)
Goodwill recorded in connection with an acquisition		7,110us-gaap_GoodwillAcquiredDuringPeriod
Acquisition related adjustments	7,250
Balance at end of period	585,006us-gaap_Goodwill	577,756us-gaap_Goodwill		1,058,631us-gaap_Goodwill
Civil [Member]
Goodwill
Balance at beginning of period	374,153		374,153	429,893
Accumulated Impairment			(55,740)
Reallocation based on relative fair value	41,205
Balance at end of period	415,358		374,153	429,893
Building [Member]
Goodwill
Balance at beginning of period	10,502		10,502	420,267
Accumulated Impairment			(409,765)
Reallocation based on relative fair value	2,953
Balance at end of period	13,455		10,502	420,267
Specialty Contractors [Member]
Goodwill
Balance at beginning of period	148,943	141,833		141,833
Goodwill recorded in connection with an acquisition		7,110
Acquisition related adjustments	7,250
Balance at end of period	156,193	148,943		141,833
Management Services [Member]
Goodwill
Balance at beginning of period	44,158		44,158	66,638
Accumulated Impairment			(22,480)
Reallocation based on relative fair value	(44,158)
Balance at end of period			$ 44,158	$ 66,638