Cash, Cash Equivalents And Restricted Cash (Reconciliation Of Cash, Cash Equivalents And Restricted Cash) (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017	Jun. 30, 2017	Dec. 31, 2016
Cash and cash equivalents	$ 138,569	$ 192,868
Restricted cash	3,434	4,780
Total cash, cash equivalents and restricted cash	142,003	197,648	$ 224,978	$ 196,607
Tutor Perini Corporation [Member]
Cash and cash equivalents	51,379	94,713
Joint Venture [Member]
Cash and cash equivalents	$ 87,190	$ 98,155