Long-term debt

Our long-term debt is summarized below (in thousands):



	Sept. 30, 2016			Dec. 31, 2015

Unsecured floating rate term loan due quarterly through August 2018	$	60,000		$	83,700
VIE unsecured floating rate term loans due quarterly through December 2018	1,454			1,938
Unsecured floating rate term loan due quarterly through June 2020	150,000			180,000
Unsecured floating rate term loan due quarterly through September 2020	300,000			—
Borrowings under revolving credit agreement expiring June 2020	730,000			720,000
Unsecured notes bearing fixed rate interest at 10% due April 2016	—			193,429
Unsecured notes bearing fixed rate interest at 7.125% due September 2018	70,000			70,000
Unsecured notes bearing fixed rate interest at 5.125% due October 2019	600,000			600,000
Unsecured notes bearing fixed rate interest at 5.125% due July 2020	600,000			600,000
Unsecured notes bearing fixed rate interest at 4.875% due September 2021	350,000			350,000
Unsecured notes bearing fixed rate interest at 6.375% due October 2023	650,000			650,000
Unsecured notes bearing fixed rate interest at 5.50% due September 2024	325,000			325,000
Unsecured notes bearing fixed rate interest at 7.75% due June 2027	200,000			200,000
Unsecured notes bearing fixed rate interest at 7.25% due September 2027	240,000			240,000
Total principal long-term debt	4,276,454			4,214,067
Debt issuance costs	(29,423		)	(31,800		)
Other (fair market value adjustments and discounts)	(8,491		)	(12,605		)
Total long-term debt	4,238,540			4,169,662
Less current portion of long-term debt maturities of VIE loans	646			646
Long-term debt, net of current portion	$	4,237,894		$	4,169,016

For the first nine months of 2016, our long-term debt increased by $68.9 million primarily due to additional borrowings of $310.0 million which is offset by debt repayments of $249.6 million. This increase was also due to the amortization of debt issuance costs and debt discounts of $3.9 million and $4.1 million respectively, during the nine months ended September 30, 2016.

On April 1, 2016, we made a debt maturity payment of approximately $203.1 million (comprised of principal and accrued interest) related to our unsecured notes bearing a fixed rate interest of 10%. The payment was made using borrowings from our revolving credit facility.

On September 26, 2016, we amended the Amended and Restated Competitive Advance and Revolving Credit Agreement to increase the facility by $103.0 million. Also, on September 30, 2016, we borrowed $300.0 million under a new four-year term loan due in 2020. The interest rate on the term loan is the same interest rates as borrowings under the Amended and Restated Competitive Advance and Revolving Credit Agreement. Both the revolving credit agreement and the term loans are guaranteed by a majority of our wholly-owned material domestic subsidiaries.

We used substantially all of the proceeds from the new term loan to repay a portion of the outstanding amount under our revolving credit facility. On September 30, 2016, we had unused borrowing capacity of $749.0 million under our revolving credit facility. On November 1, 2016 we redeemed the remaining $70 million of 7.125% unsecured notes due September 2018 at par.