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Supplemental Cash Flow Information
 12 Months Ended
Dec. 31, 2018
Supplemental Cash Flow Elements [Abstract]  
Supplemental Cash Flow Information
Supplemental Cash Flow Information
a)
The following is a tabular reconciliation of the Partnership's cash, cash equivalents and restricted cash balances for the periods presented in these consolidated financial statements:
 
As at
December 31,
 
As at
December 31,
 
As at
December 31,
 
2018
 
2017
 
2016
 
$
 
$
 
$
Cash and cash equivalents
225,040

 
221,934

 
227,378

Restricted cash (1)
8,540

 
28,360

 
92,265

Restricted cash - long-term (1)
—

 
—

 
22,644

 
233,580

 
250,294

 
342,287

(1)
Restricted cash as at December 31, 2018 includes amounts held in escrow as collateral on the Partnership's cross currency swaps, funds for a scheduled loan facility repayment, withholding taxes and office lease prepayments.
Restricted cash as at December 31, 2017 includes amounts held in escrow as collateral on the Partnership’s cross currency swaps and funds for certain vessel upgrade costs.
Restricted cash as at December 31, 2016 includes amounts held in escrow as collateral on the Partnership’s cross currency swaps, funds for certain vessel upgrade and dry dock costs and a performance bond relating to the Petrojarl Knarr FPSO unit.

b)
The changes in non-cash working capital items related to operating activities for the years ended December 31, 2018, 2017 and 2016 are as follows:
 
Year Ended
December 31,
2018
$
 
Year Ended
December 31,
2017
$
 
Year Ended
December 31,
2016
$
Accounts receivable
22,320

 
(54,830
)
 
34,669

Prepaid expenses and other assets
(2,104
)
 
(6,618
)
 
5,983

Accounts payable and accrued liabilities
(32,800
)
 
43,113

 
38,627

Advances (to) from affiliate
(70,643
)
 
51,841

 
(5,061
)
 
(83,227
)
 
33,506

 
74,218



c)
Cash interest paid (including realized losses on interest rate swaps) during the years ended December 31, 2018, 2017 and 2016 totaled $204.5 million, $205.0 million, and $180.9 million, respectively.
d)
Income taxes paid during the years ended December 31, 2018, 2017 and 2016 totaled $2.1 million, $2.2 million and $1.5 million, respectively.