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CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands | Mar. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Cash and cash equivalents | $ 174,340 | $ 192,868
Accounts receivable | 1,236,818 | 1,265,717
Retainage receivable | 530,897 | 535,939
Other current assets | 132,298 | 89,316
Accumulated depreciation | 328,443 | 359,188
PROPERTY AND EQUIPMENT, net of accumulated depreciation | 473,178 | 467,499
Accounts payable | 659,290 | 699,971
Billings in excess of cost and estimated earnings | 508,616 | 456,869
Unamortized discounts and debt issuance costs | $ 43,064 | $ 45,631
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 | 49,913,003 | 49,781,010
Common stock, shares outstanding | 49,913,003 | 49,781,010
Variable Interest Entity, Primary Beneficiary [Member] |  |
Cash and cash equivalents | $ 52,871 | $ 53,067
Accounts receivable | 28,076 | 30,003
Retainage receivable | 18,627 | 12,410
Other current assets | 30,093 | 0
PROPERTY AND EQUIPMENT, net of accumulated depreciation | 25,072 | 11,641
Accounts payable | 9,183 | 19,243
Billings in excess of cost and estimated earnings | $ 199,618 | $ 120,952

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