Business Segment Information - Schedule of Segment Reporting Information (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Segment Reporting Information [Line Items]
Revenue from external customers	$ 563,379	$ 468,400
Gross profit (loss)	56,283	25,126
Segment assets	1,759,227	1,678,219	$ 1,871,978
Operating Segments [Member]
Segment Reporting Information [Line Items]
Total revenue from reportable segments	570,979	482,504
Gross profit (loss)	56,283	25,126
Depreciation, depletion and amortization	13,063	12,078
Segment assets	778,607	746,581
Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Elimination of intersegment revenue	(7,600)	(14,104)
Construction Segment
Segment Reporting Information [Line Items]
Revenue from external customers	269,243	226,849
Construction Segment \| Operating Segments [Member]
Segment Reporting Information [Line Items]
Total revenue from reportable segments	269,243	226,849
Gross profit (loss)	38,396	27,329
Depreciation, depletion and amortization	5,054	4,994
Segment assets	136,716	149,882
Construction Segment \| Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Elimination of intersegment revenue		0
Large Project Construction [Member]
Segment Reporting Information [Line Items]
Revenue from external customers	248,414	207,033
Large Project Construction [Member] \| Operating Segments [Member]
Segment Reporting Information [Line Items]
Total revenue from reportable segments	248,414	207,033
Gross profit (loss)	20,366	2,555
Depreciation, depletion and amortization	2,599	1,886
Segment assets	345,806	306,804
Large Project Construction [Member] \| Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Elimination of intersegment revenue		0
Construction Materials [Member]
Segment Reporting Information [Line Items]
Revenue from external customers	45,722	34,518
Construction Materials [Member] \| Operating Segments [Member]
Segment Reporting Information [Line Items]
Total revenue from reportable segments	53,322	48,622
Gross profit (loss)	(2,479)	(4,758)
Depreciation, depletion and amortization	5,410	5,198
Segment assets	296,085	289,895
Construction Materials [Member] \| Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Elimination of intersegment revenue	$ (7,600)	$ (14,104)

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Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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