	June 30,
	2015			2014
Bank credit facility – term loans	$	779,297		$	810,469
Bank credit facility – revolver loans		295,000			475,000
Principal amount of long-term debt		1,074,297			1,285,469
Less unamortized debt issuance costs		(5,997	)		(5,178	)
Total long-term debt		1,068,300			1,280,291
Less current portion		(38,965	)		(41,563	)
Long-term debt, net of current portion	$	1,029,335		$	1,238,728

The Company has a $1,681.3 million credit facility (the Credit Facility), which consists of an $850.0 million revolving credit facility (the Revolving Facility) and an $831.3 million term loan (the Term Loan). The Revolving Facility has subfacilities of $75.0 million for same-day swing line loan borrowings and $25.0 million for stand-by letters of credit. At any time and so long as no default has occurred, the Company has the right to increase the Revolving Facility or the Term Loan in an aggregate principal amount of up to the greater of $400.0 million or an amount subject to 2.75 times senior secured leverage, calculated assuming the Revolving Facility is fully drawn, with applicable lender approvals. The Credit Facility is available to refinance existing indebtedness and for general corporate purposes, including working capital expenses and capital expenditures.

The Credit Facility was amended on November 15, 2013 in connection with the Company’s acquisition of Six3 Systems. See Note 4. Prior to the amendment, the Credit Facility consisted of a $750.0 million revolving credit facility and a $150.0 million term loan. In connection with the amendment, which allowed for the incurrence of $700.0 million of additional term loans and a $100.0 million increase in the Revolving Facility, the Company evaluated each creditor with ownership in the debt before and after the additional borrowings to determine whether the additional borrowings should be accounted for as a modification or an extinguishment of debt as it relates to each individual holder. As a result of this analysis, the Company recorded a $4.1 million loss on extinguishment within indirect costs and selling expenses in the three month period ended December 31, 2013. The Credit Facility was also amended on April 22, 2015, primarily to (i) extend the maturity of the Term Loan and Revolving Facility to June 1, 2020; (ii) revise the consolidated senior secured leverage ratio; and (iii) revise the amortization of the principal amount of the Term Loan to reflect the current Team Loan balance and extended maturity. Based on the change in creditor ownership and the aforementioned amendment, the Company recorded a $0.3 million loss on extinguishment in the fourth quarter of FY15.

The Revolving Facility is a secured facility that permits continuously renewable borrowings of up to $850.0 million. As of June 30, 2015, the Company had $295.0 million outstanding under the Revolving Facility, no borrowings on the swing line and outstanding letters of credit of $0.5 million. The Company pays a quarterly facility fee for the unused portion of the Revolving Facility.

The Term Loan is a five-year secured facility under which principal payments are due in quarterly installments of $9.7 million through June 30, 2018 and $19.5 million thereafter until the balance is due in full on June 1, 2020. As of June 30, 2015, the Company had $779.3 million outstanding under the Term Loan.

The interest rates applicable to loans under the Credit Facility are floating interest rates that, at the Company’s option, equal a base rate or a Eurodollar rate plus, in each case, an applicable rate based upon the Company’s consolidated total leverage ratio. As of June 30, 2015, the effective interest rate, including the impact of the Company’s floating-to-fixed interest rate swap agreements and excluding the effect of amortization of debt financing costs, for the outstanding borrowings under the Credit Facility was 2.89 percent.

The Credit Facility requires the Company to comply with certain financial covenants, including a maximum senior secured leverage ratio, a maximum total leverage ratio and a minimum fixed charge coverage ratio. The Credit Facility also includes customary negative covenants restricting or limiting the Company’s ability to guarantee or incur additional indebtedness, grant liens or other security interests to third parties, make loans or investments, transfer assets, declare dividends or redeem or repurchase capital stock or make other distributions, prepay subordinated indebtedness and engage in mergers, acquisitions or other business combinations, in each case except as expressly permitted under the Credit Facility. As of June 30, 2015, the Company was in compliance with all of the financial covenants. A majority of the Company’s assets serve as collateral under the Credit Facility.

The Company has capitalized $11.3 million of debt issuance costs associated with the Credit Facility as of the April 22, 2015 amendment. All debt issuance costs are being amortized from the date incurred to the expiration date of the Credit Facility. As of June 30, 2015, $6.0 million of the unamortized balance is included in long-term debt and $4.7 million is included in other long-term assets.

On May 21, 2015, we entered into a seventh amendment to the Credit Facility which amended the definition of change of control with relation to the composition of the Board of Directors.

The Company separately accounted for the liability and the equity (conversion option) components of the Notes and recognized interest expense on the Notes using an interest rate in effect for comparable debt instruments that do not contain conversion features. The effective interest rate for the Notes excluding the conversion option was determined to be 6.9 percent on initial recognition. The fair value of the liability component of the Notes was calculated to be $221.9 million at May 16, 2007, the date of issuance. The excess of the $300.0 million of gross proceeds over the $221.9 million fair value of the liability component, or $78.1 million, represents the fair value of the equity component, which was recorded, net of income tax effect, as additional paid-in capital within shareholders’ equity. This $78.1 million difference represents a debt discount that was amortized over the seven-year term of the Notes as a non-cash component of interest expense and was fully amortized at maturity. The components of interest expense related to the Notes were as follows (in thousands):

	June 30,
	2015		2014		2013
Coupon interest	$	—	$	5,313	$	6,375
Non-cash amortization of discount		—		11,421		12,868
Amortization of issuance costs		—		683		820
Total	$	—	$	17,417	$	20,063

In connection with the issuance of the Convertible Notes, we entered into separate call option hedge and warrant transactions to reduce the potential dilutive impact upon the conversion of the Convertible Notes. The Call Options and the Warrants (each as defined below) are separate and legally distinct instruments that bind CACI and the counterparties and have no binding effect on the holders of the Convertible Notes.

In conjunction with the issuance of the Convertible Notes in May 2007, the Company purchased in a private transaction at a cost of $84.4 million call options (the Call Options) to purchase approximately 5.5 million shares of its common stock at a price equal to the conversion price of $54.65 per share. The cost of the Call Options was recorded as a reduction of additional paid-in capital. The Call Options allowed CACI to receive shares of its common stock from the counterparties equal to the amount of common stock related to the excess conversion value that CACI would pay the holders of the Convertible Notes upon conversion. The Company exercised the call options upon the maturity and conversion of the Convertible Notes and received 1.4 million shares of our common stock.

In addition the Company sold warrants (the Warrants) to issue approximately 5.5 million shares of CACI common stock at a strike price of $68.31 per share. The proceeds from the sale of the Warrants totaled $56.5 million and were recorded as an increase to additional paid-in capital. The Warrants settled daily over 90 trading days which began in August 2014 and ended in December 2014. We issued 497,550 shares for the settlement of the Warrants.

The Company periodically uses derivative financial instruments as part of a strategy to manage exposure to market risks associated with interest rate fluctuations as of June 30. The Company has entered into several floating-to-fixed interest rate swap agreements for an aggregate notional amount of $600.0 million which hedge a portion of the Company’s floating rate indebtedness. The swaps mature at various dates through 2020. The Company has designated the swaps as cash flow hedges. Unrealized gains are recognized as assets while unrealized losses are recognized as liabilities. The interest rate swap agreements are highly correlated to the changes in interest rates to which the Company is exposed. Unrealized gains and losses on these swaps are designated as effective or ineffective. The effective portion of such gains or losses is recorded as a component of accumulated other comprehensive income or loss, while the ineffective portion of such gains or losses is recorded as a component of interest expense. Realized gains and losses in connection with each required interest payment are reclassified from accumulated other comprehensive income or loss to interest expense. The Company does not hold or issue derivative financial instruments for trading purposes.

The effect of derivative instruments in the condensed consolidated statements of operations and accumulated other comprehensive loss for the years ended June 30, 2015, 2014 and 2013 is as follows (in thousands):

	Interest Rate Swaps
	2015			2014			2013
(Loss) gain recognized in other comprehensive income	$	(9,422	)	$	(4,999	)	$	262
Amounts reclassified to earnings from accumulated other comprehensive loss	$	7,024		$	1,356		$	—
Net current period other comprehensive income (loss)	$	(2,398	)	$	(3,643	)	$	262

The aggregate maturities of long-term debt at June 30, 2015 are as follows (in thousands):

Year ending June 30,
2016	$	38,965
2017		38,965
2018		38,965
2019		77,930
2020		879,472
Principal amount of long-term debt		1,074,297
Less unamortized debt issuance costs		(5,997	)
Total long-term debt	$	1,068,300