Consolidated Balance Sheets (Parenthetical) (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Cash and cash equivalents	$ 119,299	$ 182,688
Accounts receivable, net	758,225	671,492
Contract assets	626,513	575,089
Prepaid expenses and other current assets	90,512	84,454
Property and equipment, net	124,600	122,751
Accounts payable	235,381	216,613
Accrued expenses and other current liabilities	625,729	639,863
Contract liabilities	$ 241,178	$ 230,681
Common stock, par value	$ 1	$ 1
Common stock, shares authorized	1,000,000,000	1,000,000,000
Common stock, shares, issued	146,440,701	146,440,701
Common stock, shares, outstanding	22,271,174	21,772,888
Treasury stock, shares	45,771,008	45,771,008
ESOP
Common stock, shares, outstanding	78,398,520	78,896,806
Consolidated Joint Ventures
Cash and cash equivalents	$ 43,227	$ 51,171
Accounts receivable, net	202,462	166,355
Contract assets	27,081	26,458
Prepaid expenses and other current assets	11,587	11,182
Property and equipment, net	2,752	2,945
Accounts payable	89,974	85,869
Accrued expenses and other current liabilities	90,632	74,857
Contract liabilities	$ 39,217	$ 32,638