DEBT | DEBT A summary of our debt is as follows: Weighted-Average Balance as of ($ in thousands) March 31, December 31, Maturity Date March 31, December 31, Line of credit (1) 3.99 % 4.05 % January 2023 $ 287,000 $ 131,000 Term loan (2) 3.11 % 3.52 % January 2024 150,000 275,000 Term loan (3) 3.39 % 3.79 % February 2022 200,000 200,000 Fixed-rate mortgage notes (4) 3.68 % 3.57 % September 2021 - December 2029 140,846 173,932 Floating-rate mortgage notes (5) 4.74 % 4.97 % January 2020 127,000 225,600 Total principal amount / weighted-average 3.77 % 3.98 % $ 904,846 $ 1,005,532 Less unamortized debt issuance costs $ (8,307 ) $ (4,627 ) Add mark-to-market adjustment on assumed debt 357 393 Total debt, net (excluding debt related to assets held for sale) $ 896,896 $ 1,001,298 Floating-rate mortgage notes related to assets held for sale (6) 5.24 % — % September 2020 $ 98,600 $ — Total principal amount / weighted-average (including debt related to assets held for sale) (7) 3.91 % 3.98 % $ 1,003,446 $ 1,005,532 Gross book value of properties encumbered by debt (8) $ 562,809 $ 598,978 (1) The effective interest rate is calculated based on the London Interbank Offered Rate (“LIBOR”), plus a margin ranging from 1.30% to 2.10% , depending on our consolidated leverage ratio. As of March 31, 2019 , the unused and available portions under the line of credit were approximately $163.0 million and $63.1 million , respectively. The line of credit is available for general business purposes including, but not limited to, refinancing of existing indebtedness and financing the acquisition of permitted investments, including commercial properties. (2) The effective interest rate is calculated based on LIBOR, plus a margin ranging from 1.25% to 2.05% , depending on our consolidated leverage ratio. The Company has the ability to increase borrowings under this term loan by an additional $175.0 million for total commitments of $325.0 million . As of March 31, 2019 , both the unused and available portions under the term loan were approximately $175.0 million . The weighted-average interest rate is the all-in interest rate and is fixed through interest swap agreements with respect to the funded portion only. (3) The effective interest rate is calculated based on LIBOR, plus a margin ranging from 1.25% to 2.05% , depending on our consolidated leverage ratio. The weighted-average interest rate is the all-in interest rate and is fixed through interest swap agreements. (4) The amount outstanding as of March 31, 2019 includes a $51.8 million floating-rate mortgage note that was subject to an interest rate spread of 1.65% over one-month LIBOR, which we have effectively fixed using an interest rate swap at 2.85% until the designated cash flow hedge expires in July 2021. This mortgage note matures in August 2023. (5) The effective interest rate is calculated based on LIBOR plus a margin. As of March 31, 2019 and December 31, 2018, our floating-rate mortgage notes were subject to a weighted-average interest rate spread of 2.25% and 2.47% , respectively. (6) Amount represents principal balance outstanding. Refer to “Note 3” for further detail relating to our assets held for sale. (7) The weighted-average remaining term of our borrowings (including borrowings related to assets held for sale) was approximately 3.4 years as of March 31, 2019 , excluding the impact of certain extension options. (8) Amount includes the gross book value of properties classified as held for sale that are encumbered by debt. As of March 31, 2019 , the principal payments due on our debt (including debt related to assets held for sale) during each of the next five years and thereafter were as follows: (in thousands) Line of Credit Term Loans Mortgage Notes (1) Total Remainder of 2019 $ — $ — $ 1,989 $ 1,989 2020 — — 228,366 228,366 2021 — — 11,627 11,627 2022 (2) — 200,000 2,478 202,478 2023 (3) 287,000 — 47,967 334,967 Thereafter — 150,000 74,019 224,019 Total principal payments $ 287,000 $ 350,000 $ 366,446 $ 1,003,446 (1) Includes a $127.0 million floating-rate mortgage note expiring in January 2020, which may be extended pursuant to two one -year extension options, subject to certain conditions. (2) The term of this term loan may be extended pursuant to two one -year extension options, subject to certain conditions. (3) The term of the line of credit may be extended pursuant to two six -month extension options, subject to certain conditions. Debt Covenants Our line of credit, term loans and mortgage note agreements contain various property-level covenants, including customary affirmative and negative covenants. In addition, the line of credit and term loan agreements contain certain corporate-level financial covenants, including leverage ratio, fixed charge coverage ratio, and tangible net worth thresholds. We were in compliance with our debt covenants as of March 31, 2019 . Derivative Instruments To manage interest rate risk for certain of our variable-rate debt, we use interest rate derivative instruments as part of our risk management strategy. These derivatives are designed to mitigate the risk of future interest rate increases by either providing a fixed interest rate or capping the variable interest rate for a limited, pre-determined period of time. Interest rate swaps designated as cash flow hedges involve the receipt of variable-rate amounts from a counterparty in exchange for us making fixed-rate payments over the life of the interest rate swap agreements without exchange of the underlying notional amount. Interest rate caps involve the receipt of variable amounts from a counterparty at the end of each period in which the interest rate exceeds the agreed fixed price. Interest rate caps are not designated as hedges. Certain of our variable-rate borrowings are not hedged, and therefore, to an extent, we have ongoing exposure to interest rate movements. During the next 12 months, we estimate that approximately $2.1 million will be reclassified as a decrease to interest expense related to active effective hedges of existing floating-rate debt, and we estimate that approximately $0.1 million will be reclassified as an increase to interest expense related to terminated hedges where the likelihood of the originally hedged interest payments remains probable. The following table summarizes the location and fair value of our derivative instruments on our condensed consolidated balance sheets: Fair Value ($ in thousands) Number of Contracts Notional Other Other March 31, 2019 Interest rate swaps (1) 14 $ 601,849 $ 3,019 $ 6,177 Interest rate caps 4 338,450 1 — Total derivative instruments 18 $ 940,299 $ 3,020 $ 6,177 December 31, 2018 Interest rate swaps 15 $ 634,565 $ 6,692 $ 3,220 Interest rate caps 4 338,450 25 — Total derivative instruments 19 $ 973,015 $ 6,717 $ 3,220 (1) Includes four interest rate swaps with a combined notional amount of $200.0 million that will become effective in January 2020. The following table presents the effect of our derivative instruments on our condensed consolidated financial statements: For the Three Months Ended March 31, (in thousands) 2019 2018 Derivative instruments designated as cash flow hedges: (Loss) gain recognized in AOCI $ (4,707 ) $ 3,971 (Gain) loss reclassified from AOCI into interest expense (412 ) 704 Gain reclassified from AOCI due to hedged transactions becoming probable of not occurring (1,374 ) — Total interest expense on the condensed consolidated statements of operations in which the effects of cash flow hedges are recorded 13,374 11,240 Derivative instruments not designated as cash flow hedges: (Loss) gain recognized in income $ (24 ) $ 53 |