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Supplemental Cash Flow Information
12 Months Ended
Dec. 31, 2017
Supplemental Cash Flow Elements [Abstract]  
Supplemental Cash Flow Information
SUPPLEMENTAL CASH FLOW INFORMATION:
The net effect of changes in operating assets and liabilities, net of non-cash transactions, on cash flows from operating activities of continuing operations is as follows (in thousands):
 
 
Year Ended December 31,
 
 
2017
 
2016
 
2015
Accounts and notes receivable
 
$
(425,313
)
 
$
144,877

 
$
150,470

Costs and estimated earnings in excess of billings on uncompleted
contracts
 
15,999

 
(152,702
)
 
(49,358
)
Inventories
 
14,110

 
(9,905
)
 
(33,524
)
Prepaid expenses and other current assets
 
(32,079
)
 
25,133

 
5,899

Accounts payable and accrued expenses and other non-current liabilities
 
29,722

 
81,792

 
7,311

Billings in excess of costs and estimated earnings on uncompleted
contracts
 
139,114

 
(124,680
)
 
153,017

Other, net
 
17,267

 
(13,743
)
 
(11,707
)
Net change in operating assets and liabilities, net of non-cash transactions
 
$
(241,180
)
 
$
(49,228
)
 
$
222,108


Additional supplemental cash flow information is as follows (in thousands):
 
 
Year Ended December 31,
 
 
2017
 
2016
 
2015
Cash (paid) received during the period for -
 
 
 
 
 
 
Interest paid related to continuing operations
 
$
(19,373
)
 
$
(12,828
)
 
$
(7,087
)
Income taxes paid related to continuing operations
 
$
(112,335
)
 
$
(121,662
)
 
$
(130,921
)
Income taxes paid related to discontinued operations
 
$

 
$
(7,260
)
 
$
(144,076
)
Income tax refunds related to continuing operations
 
$
9,845

 
$
7,548

 
$
23,788


During the year ended December 31, 2017, Quanta entered into a non-cash transaction whereby Quanta accepted title to a marine vessel in satisfaction and discharge of a $7.1 million note receivable.