Debt

The Company's notes payable at their principal amounts, net of unamortized discounts and debt issuance costs, consist of the following:



	December 31, 2019		September 30, 2019
	(In millions)
Unsecured:
3.75% convertible senior notes due 2020	$	118.0	$	116.7
8.0% senior notes due 2024	344.1		343.8
Revolving credit facility	—		—
	$	462.1	$	460.5

Bank Credit Facility

The Company has a $380 million senior unsecured revolving credit facility with an uncommitted accordion feature that could increase the size of the facility to $570 million, subject to certain conditions and availability of additional bank commitments. The facility also provides for the issuance of letters of credit with a sublimit equal to the greater of $100 million and 50% of the revolving credit commitment. Borrowings under the revolving credit facility are subject to a borrowing base based on the book value of the Company's real estate assets and unrestricted cash. Letters of credit issued under the facility reduce the available borrowing capacity. At December 31, 2019, there were no borrowings outstanding and $28.7 million of letters of credit issued under the revolving credit facility, resulting in available capacity of $351.3 million. There were no borrowings or repayments under the facility during the three months ended December 31, 2019.

In October 2019, the revolving credit facility was amended to extend its maturity date to October 2, 2022. The maturity date may be extended by up to one year on up to two additional occasions, subject to the approval of lenders holding a majority of the commitments.

The revolving credit facility includes customary affirmative and negative covenants, events of default and financial covenants. The financial covenants require a minimum level of tangible net worth, a minimum level of liquidity, and a maximum allowable leverage ratio. These covenants are measured as defined in the credit agreement governing the facility and are reported to the lenders quarterly. A failure to comply with these financial covenants could allow the lending banks to terminate the availability of funds under the revolving credit facility or cause any outstanding borrowings to become due and payable prior to maturity. At December 31, 2019, the Company was in compliance with all of the covenants, limitations and restrictions of its revolving credit facility.

3.75% Convertible Senior Notes due 2020

At December 31, 2019, the principal amount of the 3.75% convertible senior notes due March 2020 was $118.9 million and the unamortized debt discount was $0.8 million. The effective interest rate on the liability component was 8.0% and the carrying amount of the equity component was $16.8 million. The Company intends to settle the principal amount of these notes in cash, with any excess conversion value to be settled in shares of its common stock. At December 31, 2019 and September 30, 2019, the Company had $0.1 million and $0.2 million in unamortized deferred financing fees that were deducted from the carrying value of these notes.

8.0% Senior Notes due 2024

In April 2019, the Company issued $350 million principal amount of 8.0% senior notes pursuant to Rule 144A and Regulation S under the Securities Act of 1933, as amended (the "Securities Act"). The notes mature April 15, 2024 with interest payable semi-annually and represent senior unsecured obligations that rank equally in right of payment to all existing and future senior unsecured indebtedness. The notes may be redeemed prior to maturity, subject to certain limitations and premiums defined in the indenture agreement. On or after April 15, 2021, the notes may be redeemed at 104% of their principal amount plus any accrued and unpaid interest. The redemption price decreases annually on a ratable basis to par by April 15, 2023 in accordance with the indenture. The notes are guaranteed by each of the Company's subsidiaries to the extent such subsidiaries guarantee the Company's revolving credit facility. At December 31, 2019 and September 30, 2019, the Company had $5.9 million and $6.2 million in unamortized deferred financing fees that were deducted from the carrying value of these notes. The annual effective interest rate of the notes after giving effect to the amortization of financing costs is 8.5%.

The indenture governing the notes requires that, upon the occurrence of both a Change of Control and a Rating Decline (each as defined in the indenture), the Company offer to purchase the notes at 101% of their principal amount. If the Company or its restricted subsidiaries dispose of assets, under certain circumstances, the Company will be required to either invest the net cash proceeds from such asset sales in its business within a specified period of time, repay certain senior secured debt or debt of its non-guarantor subsidiaries, or make an offer to purchase a principal amount of the notes equal to the excess net cash proceeds at a purchase price of 100% of their principal amount. The indenture contains covenants that, among other things, restrict the ability of the Company and its restricted subsidiaries to pay dividends or distributions, repurchase equity, prepay subordinated debt and make certain investments; incur additional debt or issue mandatorily redeemable equity; incur liens on assets; merge or consolidate with another company or sell or otherwise dispose of all or substantially all of the Company’s assets; enter into transactions with affiliates; and allow to exist certain restrictions on the ability of subsidiaries to pay dividends or make other payments.

At December 31, 2019, the Company was in compliance with all of the limitations and restrictions associated with its senior note obligations.