Long-term debt

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



	Sept. 30, 2018			Dec. 31, 2017

Unsecured floating rate term loan due quarterly through August 2018	$	—		$	20,500
VIE unsecured floating rate term loans due quarterly through December 2018	162			646
Unsecured floating rate term loan due quarterly through June 2020	70,000			100,000
Unsecured floating rate term loan due quarterly through September 2020	180,000			225,000
Borrowings under revolving credit agreement expiring June 2023	72,000			—
Unsecured notes bearing fixed rate interest at 5.125% due October 2019	320,000			320,000
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	3,007,162			3,031,146
Debt issuance costs	(16,766		)	(20,551		)
Other (fair market value adjustments and discounts)	(799		)	(2,902		)
Total long-term debt	2,989,597			3,007,693
Less current portion of long-term debt maturities	162			646
Long-term debt, net of current portion	$	2,989,435		$	3,007,047

On June 21, 2018, we entered into an amendment of our Amended and Restated Competitive Advance and Revolving Credit Agreement. Under the amended terms, the $1.51 billion of revolving credit commitments and letter of credit commitments have been extended until June 21, 2023. The amendment also extended our permitted total leverage ratio to remain at 5.0x through June 30, 2019, reducing to 4.75x for the fiscal quarter ending September 30, 2019 through the end of the fiscal quarter ending June 30, 2020, and then reducing to 4.50x for the fiscal quarter ending September 30, 2020 and thereafter.

As of September 30, 2018, we had unused borrowing capacity of $1.42 billion under our revolving credit facility.