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Derivatives (Tables)
6 Months Ended
Jun. 30, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]  
Schedule of interest rate swaps
At June 30, 2018, the Partnership was a party to the following interest rate swaps, which were entered into to offset changes in expected cash flows due to fluctuations in the associated variable interest rates:
Expiration Date
 
Notional Value
(in millions)
May 2019
 
$
100.0

May 2020
 
100.0

March 2022
 
300.0

 
 
$
500.0

Effect of derivative instruments on consolidated financial position
The following tables present the effect of derivative instruments designated as hedging instruments on our consolidated financial position and results of operations (in thousands):
 
 
Fair Value Asset (Liability)
Balance Sheet Location
 
June 30, 2018
 
December 31, 2017
Other current assets
 
$
2,816

 
$
186

Other long-term assets
 
9,050

 
4,490

Accrued liabilities
 

 
(134
)
 
 
$
11,866

 
$
4,542

Effect of derivative instruments on results of operations
 
Pre-tax Gain (Loss)
Recognized in Other
Comprehensive
Income (Loss) on
Derivatives
 
Location of Pre-tax
Loss
Reclassified from
Accumulated Other
Comprehensive
Income (Loss) into
Income (Loss)
 
Pre-tax Loss
Reclassified from
Accumulated Other
Comprehensive
Income (Loss) into
Income (Loss)
Derivatives designated as cash flow hedges:
 
 
 
 
 
Interest rate swaps
 
 
 
 
 
Three months ended June 30, 2018
$
2,245

 
Interest expense
 
$
(39
)
Three months ended June 30, 2017
(336
)
 
Interest expense
 
(830
)
Six months ended June 30, 2018
6,941

 
Interest expense
 
(513
)
Six months ended June 30, 2017
363

 
Interest expense
 
(1,843
)


 
Location and Amount of Gain (Loss) Recognized in Income on Cash Flow Hedging Relationships
 
Three Months Ended June 30, 2018
 
Six Months Ended June 30, 2018
 
Interest Expense
Total amount of income and expense line items presented in the statement of operations in which the effects of cash flow hedges are recorded
$
23,337

 
$
45,884

Interest Contracts:
 
 
 
Amount of gain reclassified from accumulated other comprehensive income into income
$
207

 
$
153