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CONDENSED CONSOLIDATED BALANCE SHEET (Parenthetical) - USD ($) $ in Thousands | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Shareholders' equity |  |
Preferred stock, authorized shares (in shares) | 20,000,000 | 20,000,000
Preferred stock, par value (in dollars per share) | $ 0.01 | $ 0.01
Preferred stock, issued shares (in shares) | 0 | 0
Common stock, authorized shares (in shares) | 375,000,000 | 375,000,000
Common stock, par value (in dollars per share) | $ 0.01 | $ 0.01
Common stock, issued shares (in shares) | 139,918,324 | 139,258,483
Common stock, outstanding shares (in shares) | 139,918,324 | 139,258,483
CURRENT ASSETS, VIEs |  |
Cash and cash equivalents | $ 1,804,075 | $ 1,850,436
Marketable securities, current | 161,134 | 111,037
Accounts and notes receivable | 1,602,751 | 1,700,224
Costs in Excess of Billings, Current | 1,458,533 | 1,537,289
Other current assets | 574,764 | 411,284
Net property, plant, and equipment | 1,093,681 | 1,017,223
Other noncurrent assets | 377,288 | 370,151
CURRENT LIABILITIES, VIEs |  |
Trade accounts payable | 1,512,740 | 1,590,506
Advance billings on contracts | 874,036 | 763,774
Accrued salaries, wages and benefits | 706,520 | 734,649
Other accrued liabilities | 453,513 | 644,857
Consolidated variable interest entities |  |
CURRENT ASSETS, VIEs |  |
Cash and cash equivalents | 516,046 | 439,942
Marketable securities, current | 91,295 | 48,155
Accounts and notes receivable | 327,652 | 232,242
Costs in Excess of Billings, Current | 132,500 | 124,677
Other current assets | 9,229 | 24,017
Net property, plant, and equipment | 44,004 | 53,728
Other noncurrent assets | 27,631 | 24,248
CURRENT LIABILITIES, VIEs |  |
Trade accounts payable | 258,592 | 221,601
Advance billings on contracts | 361,701 | 263,393
Accrued salaries, wages and benefits | 32,678 | 35,573
Other accrued liabilities | $ 44,211 | $ 32,015

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- Definition The aggregate of amounts due from customers or clients, within one year of the balance sheet date (or one operating cycle, if longer), for goods or services that have been delivered or sold in the normal course of business and an amount representing an agreement for an unconditional promise by the maker to pay the entity (holder) a definite sum of money at a future date within one year of the balance sheet, reduced to their estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection and net of any write-downs taken for collection uncertainty on the part of the holder, respectively. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.3,4) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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