CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2019		Dec. 31, 2018
Cash and cash equivalents	$ 101,482		$ 116,075
Accounts receivable	1,347,881		1,261,072
Retainage receivable	490,132		478,744
Other current assets	124,303		115,527
Accumulated depreciation	355,939		343,735
PROPERTY AND EQUIPMENT, net of accumulated depreciation	492,929		490,669
Accounts payable	597,498		621,728
Accrued expenses and other current liabilities	173,827	[1]	174,325	[2]
Billings in excess of costs and estimated earnings	$ 579,000		$ 573,190
Preferred stock, shares authorized	1,000,000		1,000,000
Preferred stock, par value (in dollars per share)	$ 1		$ 1
Preferred stock, shares issued	0		0
Common stock, shares authorized	75,000,000		75,000,000
Common stock, par value (in dollars per share)	$ 1		$ 1
Common stock, shares issued	50,180,225		50,025,996
Common stock, shares outstanding	50,180,225		50,025,996
Variable Interest Entity, Primary Beneficiary [Member]
Cash and cash equivalents	$ 38,485		$ 43,131
Accounts receivable	54,791		62,482
Retainage receivable	45,618		36,724
Other current assets	33,666		30,185
PROPERTY AND EQUIPMENT, net of accumulated depreciation	51,128		51,508
Accounts payable	29,210		18,070
Accrued expenses and other current liabilities	35,851		34,828
Billings in excess of costs and estimated earnings	244,617		263,764
Unamortized discounts and debt issuance costs	$ 32,185		$ 34,998

[1] Prior to the adoption of ASC 842, operating lease ROU assets and current and long-term operating lease liabilities were not recorded on the Condensed Consolidated Balance Sheets.

[2] Balance as previously reported on the Company's Annual Report on Form 10-K for the year ended December 31, 2018.