DEBT OBLIGATIONS

Long term obligations consisted of the following (in thousands):



	March 31,			December 31,
	2015			2014
Unsubordinated term loan	$	112,500		$	116,250
Revolving credit facility	180,000			180,000
Aircraft loans	44,018			46,294
Promissory note due to DHL, unsecured	—			1,550
Total long term obligations	336,518			344,094
Less: current portion	(24,507		)	(24,344		)
Total long term obligations, net	$	312,011		$	319,750

The Company executed a syndicated credit agreement ("Senior Credit Agreement") in May 2011 which includes an unsubordinated term loan and a revolving credit facility. On May 8, 2015, the Company executed an amendment to the Senior Credit Agreement (the "Fifth Credit Amendment"). The Fifth Credit Amendment extended the maturity of the term loan and revolving credit facility to May 5, 2020, increased the capacity of the Revolving credit facility by $50.0 million to $325.0 million, increased the permitted additional indebtedness by $50.0 million to $150.0 million, and retained the accordion feature whereby the Company can draw up to an additional $50.0 million subject to the lenders' consent. Under the amended terms of the Senior Credit Agreement, the Company is required to maintain collateral coverage equal to 150% of the outstanding balances of the term loan and the maximum capacity of revolving credit facility or 175% of the outstanding balance of the term loan and the total funded revolving credit facility, whichever is less. The minimum collateral coverage which must be maintained is 50% of the outstanding balance of the term loan plus the revolving credit facility commitment which was $325.0 million as of May 8, 2015. Each year, through May 6, 2019, the Company may request a one year extension of the final maturity date, subject to the lenders' consent.

Under the terms of the Senior Credit Agreement, interest rates are adjusted quarterly based on the Company's earnings before interest, taxes, depreciation and amortization expenses ("EBITDA"), its outstanding debt level and prevailing LIBOR or prime rates. At the Company's current debt-to-EBITDA ratio, the LIBOR based financing for the unsubordinated term loan and revolving credit facility bear a variable interest rate of 1.93% and 1.93%, respectively. The Credit Amendment did not affect the EBITDA based pricing or covenants of the Senior Credit Agreement. The Senior Credit Agreement provides for the issuance of letters of credit on the Company's behalf. As of March 31, 2015, the unused revolving credit facility totaled $85.9 million, net of draws of $180.0 million and outstanding letters of credit of $9.1 million.

The aircraft loans are collateralized by six aircraft, and amortize monthly with a balloon payment of approximately 20% with maturities between 2016 and early 2018. Interest rates range from 6.74% to 7.36% per annum payable monthly.

The Senior Credit Agreement is collateralized by certain of the Company's Boeing 767 and 757 aircraft that are not collateralized under aircraft loans. The Senior Credit Agreement contains covenants including, among other things, limitations on certain additional indebtedness, guarantees of indebtedness, as well as a total debt to EBITDA ratio and a fixed charge coverage ratio. The Senior Credit Agreement stipulates events of default, including unspecified events that may have material adverse effects on the Company. If an event of default occurs, the Company may be forced to repay, renegotiate or replace the Senior Credit Agreement. The Senior Credit Agreement limits the amount of dividends the Company can pay and the amount of common stock it can repurchase to $50.0 million during any calendar year, provided the Company's total debt to EBITDA ratio is under 2.5 times, after giving effect to the dividend or repurchase.