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Fair Value Measurements (Tables)
 12 Months Ended
Dec. 31, 2018
Fair Value Disclosures [Abstract]  
Fair Value, by Balance Sheet Grouping The following table presents the carrying amount and estimated fair values of financial instruments held by the Company at December 31, 2018 and 2017, using market information and what the Company believes to be appropriate valuation methodologies under generally accepted accounting principles:
 
December 31, 2018
 
December 31, 2017
Asset (liability) (a)
Carrying
Amount
 
Fair Value
 
Carrying
Amount
 
Fair Value
 
 
 
Level 1
 
Level 2
 
 
 
Level 1
 
Level 2
Cash and cash equivalents

$148,374

 

$148,374

 
—

 

$112,653

 

$112,653

 
—

Restricted cash (b)
8,080

 
8,080

 
—

 
59,703

 
59,703

 
—

Current maturities of long-term debt
—

 
—

 
—

 
(3,375
)
 
—

 
(3,375
)
Long-term debt (c)
(972,567
)
 
—

 
(975,845
)
 
(1,022,004
)
 
—

 
(1,030,135
)
Interest rate swaps (d)
23,735

 
—

 
23,735

 
15,440

 
—

 
15,440

Foreign currency exchange contracts (d)
(1,442
)
 
—

 
(1,442
)
 
2,807

 
—

 
2,807

Foreign currency option contracts (d)
145

 
—

 
145

 
352

 
—

 
352

Carbon options contracts (d)
(322
)
 
—

 
(322
)
 
—

 
—

 
—

 
 
 
 
 

(a)
The Company did not have Level 3 assets or liabilities at December 31, 2018 and 2017.
(b)
Restricted cash represents the proceeds from like-kind exchange sales deposited with a third-party intermediary and cash held in escrow for a real estate sale. See Note 19 - Restricted Cash for additional information.
(c)
The carrying amount of long-term debt is presented net of capitalized debt costs on non-revolving debt. See Note 5 — Debt for additional information.
(d)
See Note 13 — Derivative Financial Instruments and Hedging Activities for information regarding the Balance Sheet classification of the Company’s derivative financial instruments.