CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
CURRENT ASSETS:
Cash equivalents (in dollars)	$ 6,437	$ 23,140
Accounts receivable, retainage (in dollars)	364,239	354,269
CURRENT LIABILITIES:
Accounts payable, retainage (in dollars)	$ 137,944	$ 137,662
STOCKHOLDERS' EQUITY:
Preferred stock, par value (in dollars per share)	$ 1	$ 1
Preferred stock, shares authorized	1,000,000	1,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value (in dollars per share)	$ 1	$ 1
Common stock, shares authorized	75,000,000	75,000,000
Common stock, shares issued	48,421,467	47,556,056
Common stock, shares outstanding	48,421,467	47,556,056