Derivative Financial Instruments:

Derivative financial instruments are used within the Partnership’s overall risk management program to manage certain interest rate and foreign currency risks. By utilizing a derivative instrument to hedge exposure to LIBOR rate changes, the Partnership is exposed to counterparty credit risk, in particular the failure of the counterparty to perform under the terms of the derivative contract. To mitigate this risk, hedging instruments are placed with a counterparty that the Partnership believes poses minimal credit risk. The Partnership does not use derivative financial instruments for trading purposes.

During the first quarter of 2016, the Partnership amended its four interest rate swap agreements to extend each of the maturities to December 31, 2020 and convert $500 million of variable-rate debt to a rate of 4.39%. During the second quarter of 2018, the Partnership entered into four additional interest rate swap agreements that convert the same notional amount to a rate of 4.63% for the period December 31, 2020 through December 31, 2023. None of the interest rate swap agreements are designated as hedging instruments. The fair market value of the swap portfolio was recorded on the unaudited condensed consolidated balance sheets within "Derivative Liability" as of March 31, 2019, December 31, 2018 and March 25, 2018 as follows:



(In thousands)	March 31, 2019			December 31, 2018			March 25, 2018
Derivatives not designated as hedging instruments:
Interest rate swaps	$	(13,083	)	$	(6,705	)	$	(2,730	)

Instruments that do not qualify for hedge accounting or were de-designated are prospectively adjusted to fair value each reporting period through "Net effect of swaps" within the unaudited condensed consolidated statements of operations and comprehensive income. The amounts that were previously recorded as a component of AOCI prior to the de-designation are reclassified to earnings, and a corresponding realized gain or loss is recognized when the forecasted cash flow occurs. As a result of the first quarter 2016 amendments, the previously existing interest rate swap agreements were de-designated, and the amounts previously recorded in AOCI were amortized into earnings through the original December 31, 2018 maturity. Therefore, all losses in AOCI related to the effective cash flow hedge contracts prior to de-designation have been reclassified into earnings as of December 31, 2018.

The (gains) losses recognized in income on derivatives not designated as cash flow hedges were recorded in "Net effect of swaps" within the unaudited condensed consolidated statements of operations and comprehensive income for the periods presented as follows:



	Three months ended
(In thousands)	March 31, 2019		March 25, 2018
Change in fair market value	$	6,379	$	(5,993	)
Amortization of amounts in AOCI	—		2,365
Net effect of swaps	$	6,379	$	(3,628	)