December 31,

2014

2013

8.50% Senior Notes

$

900,000

$

900,000

Debt premiums, net of amortization

13,057

15,421

Revolving bank credit facility

447,000

290,000

Total long-term debt

1,360,057

1,205,421

Current maturities of long-term debt

—

—

Long term debt, less current maturities

$

1,360,057

$

1,205,421

(1)

Aggregate annual maturities of long-term debt as of December 31, 2014 are as follows (in millions): 2015–$0.0; 2016–$0.0; 2017–$0.0; 2018–$447.0; thereafter–$900.0.