floor of 1.00%). Based on market interest rates for debt of similar terms and average maturities, the fair value of the Company’s Term Loan Facility as of December 31, 2019 and June 30, 2019 was estimated to be $1,763.8 million and $1,758.0 million, respectively. The Company’s fair value estimates associated with its Term Loan Facility obligations were derived utilizing Level 2 inputs—quoted prices for similar instruments in active markets.
As of December 31, 2019 and June 30, 2019, the outstanding balance under the Company’s Revolver was $50.0 million and $145.0 million, respectively.
A hypothetical increase in the applicable interest rate on the Company’s Term Loan Facility and Revolver of 1 percentage point above the 1.0% LIBOR floor would increase the Company’s annual interest expense by approximately $18.1 million.
(11) COMMITMENTS AND CONTINGENCIES
Purchase Commitments
As of December 31, 2019, the Company was contractually committed for $612.7 million of capital expenditures for construction materials and purchases of property and equipment. A majority of these obligations are expected to be satisfied in the next twelve months. These obligations are primarily success based; that is, the Company has executed customer contracts that support the future capital expenditures.
During the year ended June 30, 2019, the Company entered into a CAD $127.0 million (or $97.6 million) commitment for telecommunications services over a two-year period. As of December 31, 2019, CAD $57.0 million (or $43.8 million) remained on the commitment.
Also, during the year ended June 30, 2019, the Company entered into a CAD $40.0 million (or $30.7 million) commitment for telecommunications services over a three-year period. As of December 31, 2019, CAD $18.6 million (or $14.3 million) remained on the commitment.
Outstanding Letters of Credit
As of December 31, 2019, the Company had $8.8 million in outstanding letters of credit, which were primarily entered into in connection with various lease agreements. Additionally, as of December 31, 2019, Zayo Canada, Inc., a subsidiary of the Company, had CAD $2.8 million (or $2.2 million) in letters of credit under a CAD $5.0 million (or $3.8 million) unsecured credit agreement.
Contingencies
In the normal course of business, the Company is party to various outstanding legal proceedings, asserted and unasserted claims, and disputes. In the opinion of management, the ultimate disposition of these matters, both asserted and unasserted, will not have a material adverse effect on the Company’s financial condition, results of operations, or cash flows.
The Company accrues for losses related to contingencies when a loss from such claims is probable and the amount of loss can be reasonably estimated. In determining whether a loss from a claim is probable and the loss can be reasonably estimated, the Company reviews and evaluates its litigation and regulatory matters in light of potentially relevant factual and legal developments. If the Company determines an unfavorable outcome is not probable or the amount of loss cannot be reasonably estimated, the Company does not accrue for a potential litigation loss. In those situations, the Company discloses an estimate or range of the reasonably possible losses, if such estimates can be made. At this time, the Company does not believe that it is possible to estimate the reasonably possible losses or a range of reasonably possible losses related to the matters described below.
Following the filing of the preliminary proxy statement on June 3, 2019, several complaints were filed against ZGH and its Board of Directors challenging the Merger. Four actions were filed in the United States District Court for the District of Delaware captioned Scarantino v. Zayo Group Holdings, Inc., et al., Case No. 1:19-cv-01068-RGA (D. Del.), Klein v. Zayo Group Holdings, Inc., et al., Case No. 1:19-cv-01085-RGA (D. Del.), Duggan v. Zayo Group