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Supplemental Cash Flow Information
 12 Months Ended
Dec. 31, 2019
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,
 
2019
 
2018
 
2017
 
$
 
$
 
$
Cash and cash equivalents
199,388

 
225,040

 
221,934

Restricted cash(1)
17,798

 
8,540

 
28,360

Restricted cash - long-term(1)
89,070

 
—

 
—

 
306,256

 
233,580

 
250,294

(1)
Restricted cash as at December 31, 2019 includes funds held as a guarantee for certain operating expenses, funds for scheduled loan facility repayments, withholding taxes and office lease prepayments. Restricted cash - long-term as at December 31, 2019 includes amounts held in escrow for a shuttle tanker newbuilding yard installment payment.
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.

b)
The changes in non-cash working capital items related to operating activities for the years ended December 31, 2019, 2018 and 2017 are as follows:
 
Year Ended
December 31,
2019
$
 
Year Ended
December 31,
2018
$
 
Year Ended
December 31,
2017
$
Accounts receivable
(57,957
)
 
22,320

 
(54,830
)
Prepaid expenses and other assets
1,115

 
(2,104
)
 
(6,618
)
Accounts payable and accrued liabilities
68,219

 
(32,800
)
 
43,113

Due from (to) related parties
1,039

 
(70,643
)
 
51,841

 
12,416

 
(83,227
)
 
33,506



c)
Cash interest paid (including realized losses on interest rate swaps) during the years ended December 31, 2019, 2018 and 2017 totaled $217.8 million, $204.5 million and $205.0 million, respectively.
d)
Income taxes paid during the years ended December 31, 2019, 2018 and 2017 totaled $4.9 million, $2.1 million and $2.2 million, respectively.