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Financial Instruments (Tables)
 6 Months Ended
Jun. 30, 2018
Derivative Instrument Detail [Abstract]  
Estimated Fair Value of Financial Instruments

The following table presents the estimated fair values of our financial instruments:

 

 

June 30, 2018

 

 

December 31, 2017

 

(Dollars in thousands)

 

Carrying

Amount

 

 

Fair

Value

 

 

Carrying

Amount

 

 

Fair

Value

 

Cash and cash equivalents (Level 1)

 

$

125,719

 

 

$

125,719

 

 

$

120,457

 

 

$

120,457

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Derivative assets related to interest rate swaps (Level 2)

 

$

2,108

 

 

$

2,108

 

 

$

1,169

 

 

$

1,169

 

Derivative liabilities related to interest rate swaps (Level 2)

 

$

(473

)

 

$

(473

)

 

$

—

 

 

$

—

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Long-term debt, including current portion (Level 2):

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Term loans

 

$

(538,844

)

 

$

(536,146

)

 

$

(343,500

)

 

$

(345,222

)

Senior notes

 

 

(149,657

)

 

 

(156,375

)

 

 

(149,528

)

 

 

(161,063

)

Revenue bonds

 

 

(94,735

)

 

 

(93,880

)

 

 

(65,735

)

 

 

(63,967

)

Medium-term notes

 

 

(3,000

)

 

 

(3,456

)

 

 

(17,250

)

 

 

(18,227

)

Total long-term debt1

 

$

(786,236

)

 

$

(789,857

)

 

$

(576,013

)

 

$

(588,479

)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Company owned life insurance asset (COLI) (Level 3)

 

$

2,424

 

 

$

2,424

 

 

$

1,996

 

 

$

1,996

 

1

The carrying amount of long-term debt includes principal and unamortized discounts.