13. Debt Obligations

Debt obligations consist of the following (in thousands):



	September 30, 2018			December 31, 2017
Corporate
11.0% Senior Secured Notes due in 2019	$	510,000		$	400,000
Construction
LIBOR plus 2.50% Line of Credit	10,000			—
LIBOR plus 2.25% Notes, due in 2024	4,713			6,738
LIBOR plus 1.50% Line of Credit	37,312			19,670
Marine Services
Notes payable and revolving lines of credit, various maturity dates	28,145			23,748
Obligations under capital leases	42,178			48,500
Energy
4.50% Note due in 2022	11,619			12,454
5.00% Term Loan due in 2022	12,731			13,706
Other, various maturity dates	3,410			4,363
Life Sciences
11.0% Notes, various maturity dates	1,475			1,750
Broadcasting
LIBOR plus applicable margin Bridge Note, due in 2018	—			60,000
8.50% Note due 2019	35,000			—
Other, various maturity dates	9,993			10,135
Other
Notes payable, various maturity dates	—			54
Total	706,576			601,118
Issuance discount, net and deferred financing costs	(4,356		)	(7,946		)
Debt obligations	$	702,220		$	593,172

Non-operating corporate

On May 7, 2018, the Company closed on $110.0 million aggregate principal amount of 11.0% Senior Secured Notes due 2019 (the “Notes”). The Notes were issued at a price of 102.0% of principal amount, which resulted in a premium of $2.2 million. The Company used the net proceeds from the issuance of the Notes to refinance the outstanding bridge loan (the "Bridge Loan") at our Broadcasting segment.

Construction

DBMG Credit Facilities

DBMG has a Credit and Security Agreement ("DBMG Facility") with Wells Fargo Credit, Inc. ("Wells Fargo"). Under the initial terms of the agreement, Wells Fargo agreed to advance up to a maximum amount of $50.0 million to DBMG, including up to $14.5 million of letters of credit (the "Revolving Line"). The Revolving Line had a floating interest rate based on LIBOR plus 2.0%, required monthly interest payments, and matured in April 2019.

The DBMG Facility allows for the issuance by DBMG of additional loans in the form of notes of up to $10.0 million ("Real Estate Term Advance"), at LIBOR plus 2.5% and the issuance of a note payable of up to $15.0 million, ("Real Estate Term Advance 2") at LIBOR plus 2.5%, each as separate tranches of debt under the DBMG Facility.

The DBMG Facility was amended effective April 5, 2018, modifying the Revolving Line by increasing the maximum advance amount to $70.0 million, modifying the floating interest rate to LIBOR plus 1.5% and extending the maturity date through March 31, 2023. The amendment also created a $17.0 million long-term tranche under the $70.0 million Revolving Line with a maturity date of May 31, 2025. Additionally, The Real Estate Term Advance and Real Estate Advance 2 interest rates were modified to LIBOR plus 2.25% with a maturity date of April 30, 2024. Should the DBMG Facility not be renewed at the Revolving Line maturity date of March 31, 2023, all outstanding balances become immediately due.

On July 24, 2018, the DBMG Facility was amended, increasing the availability of the borrowing base allowing DBMG to borrow an additional $10.0 million of the $70.0 million total line and bearing interest at LIBOR plus 2.5%. The temporary borrowing base increase and related interest had an initial maturity date of October 23, 2018. On October 23, 2018 the maturity date was extended to November 23, 2018.

As of September 30, 2018, DBMG had drawn $37.3 million under the Revolving Line and $10.0 million of additional borrowing base from the July amendment, and had $8.5 million in outstanding letters of credit issued under the DBMG Facility, of which zero has been drawn. At September 30, 2018 there was $2.3 million outstanding under the Real Estate Term Advance and $2.4 million of borrowings outstanding under the Real Estate Term Advance 2.

Marine Services

On April 4, 2018, GMSL entered into a 7.49% fixed interest only loan, due April 3, 2019, with Shawbrook Bank Limited for £7.2 million, or approximately $9.4 million ("Shawbrook Loan"), the net proceeds used to fund capital expenditures, being mainly upgrades to cable ships, and working capital requirements on installation contracts.

On September 21, 2018, GMSL refinanced the Shawbrook Loan, extending the principal balance to £11.0 million, or approximately $14.4 million, and extending the maturity date to September 20, 2019. The net proceeds were used to pay the principal balance of the original Shawbrook loan and repay the debt associated with the purchase of the Fugro trenching business acquisition.

As part of the Fugro trenching business acquisition in 2017, GMSL issued to Fugro a $7.5 million secured loan, which bears interest, payable quarterly, at 4% per annum through January 11, 2018, and at 10% per annum thereafter, and matures 363 days following the acquisition. In September 2018, GMSL repaid the note in full.

Insurance

In July 2018, in connection with the signed agreement to purchase the long-term care block of Humana, CGI obtained a three month surplus note (the "Surplus Note") from Humana, issued July 17, 2018 and due September 14, 2018, in the amount of $32.0 million. The Surplus Note was paid in its entirety full on August 17, 2018.

Broadcasting

On February 4, 2018, the Broadcasting segment entered into a First Amendment to the $75.0 million Bridge Loan to finance acquisitions in the LPTV distribution market. The First Amendment to the Bridge Loan extends the agreement to add an additional $27.0 million in principal borrowing capacity to the existing credit agreement.

On February 6, 2018, the Broadcasting segment borrowed $42.0 million in principal amount of the Bridge Loan at LIBOR plus applicable margin, the net proceeds used to finance certain acquisitions, to pay fees, costs and expenses relating to the Bridge Loan, and for general corporate purposes.

The Bridge Loan of $102.0 million was repaid as part of the May 7, 2018 HC2 financing transaction. As part of the transaction, the Broadcasting segment recorded a loss on extinguishment of debt of $2.5 million, which was recorded in Other income (expenses), net in the Condensed Consolidated Financial Statements.

On August 7, 2018, certain subsidiaries of the Broadcasting segment entered into several financing transactions, generating approximately $38.1 million of proceeds. Included in these financing transactions were HC2 Station Group, Inc.'s, and LPTV's issuance of a $35.0 million 364-day Secured Note (the “Secured Note”) to certain institutional investors. The Secured Note bears interest at a rate of 8.50%, payable at maturity.