Business Segments (Reconciliation of Segment Results to Consolidated Income Before Income Taxes) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Business Segments [Abstract]
Income (loss) from construction operations	$ 22,913	$ (925)	[1]
Other income, net	422	780
Interest expense	(16,425)	(15,065)
INCOME (LOSS) BEFORE INCOME TAXES	$ 6,910	$ (15,210)

[1] During the three months ended March 31, 2018, the Company recorded a charge of $17.8 million in income from construction operations (an after-tax impact of $12.8 million, or $0.25 per diluted share), which was primarily non-cash, as a result of the unexpected outcome of an arbitration decision related to a subcontract back charge dispute on a Civil segment project in New York that was completed in 2013.