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Financial Instruments (Tables)
 3 Months Ended
Mar. 31, 2018
Derivative Instrument Detail [Abstract]  
Estimated Fair Value of Financial Instruments

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

 

 

March 31, 2018

 

 

December 31, 2017

 

(Dollars in thousands)

 

Carrying

Amount

 

 

Fair

Value

 

 

Carrying

Amount

 

 

Fair

Value

 

Cash and cash equivalents (Level 1)

 

$

102,340

 

 

$

102,340

 

 

$

120,457

 

 

$

120,457

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Derivative assets related to interest rate swaps (Level 2)

 

$

1,869

 

 

$

1,869

 

 

$

1,169

 

 

$

1,169

 

Derivative liabilities related to interest rate swaps (Level 2)

 

$

(1,670

)

 

$

(1,670

)

 

$

—

 

 

$

—

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Term loans

 

$

(543,500

)

 

$

(538,306

)

 

$

(343,500

)

 

$

(345,222

)

Senior notes

 

 

(149,592

)

 

 

(159,375

)

 

 

(149,528

)

 

 

(161,063

)

Revenue bonds

 

 

(94,735

)

 

 

(93,775

)

 

 

(65,735

)

 

 

(63,967

)

Medium-term notes

 

 

(3,000

)

 

 

(3,511

)

 

 

(17,250

)

 

 

(18,227

)

Total long-term debt1

 

$

(790,827

)

 

$

(794,967

)

 

$

(576,013

)

 

$

(588,479

)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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

 

$

2,241

 

 

$

2,241

 

 

$

1,996

 

 

$

1,996

 

1

The carrying amount of long-term debt above excludes unamortized discounts.