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Fair Value Measurements, Financial Instruments, and Credit Risk (Tables)
 12 Months Ended
Dec. 31, 2021
Fair Value Disclosures [Abstract]  
Summary of fair value measurements at reporting date Our assessment of the significance of a particular input to the fair value measurement requires judgment, which judgment may affect the valuation of their fair value and placement within the fair value hierarchy levels. As of December 31, 2021 and 2020, the Company has no assets or liabilities utilizing significant unobservable inputs (or Level 3) to derive its estimated fair values.
   Fair Value Measurements at Reporting
Date Using
 Balance Sheet LocationDecember 31, 2021Quoted Prices in Active Markets for Identical Assets
(Level 1)		Significant Other Observable Inputs
(Level 2)
  (In thousands)
Retirement plan asset—noncurrentOther long-term assets$2,986 $2,986 $— 
Derivative liability – currentOther payables and accruals(48)— (48)
Total $2,938 $2,986 $(48)
 
   Fair Value Measurements at Reporting
Date Using
 Balance Sheet LocationDecember 31, 2020Quoted Prices in Active Markets for Identical Assets
(Level 1)		Significant Other Observable Inputs
(Level 2)
  (In thousands)
Retirement plan asset—noncurrentOther long-term assets$2,454 $2,454 $— 
Derivative liability – currentOther payables and accruals(219)— (219)
Total $2,235 $2,454 $(219)
Summary of carrying values and approximate fair values of long-term debt The following table presents the carrying values and approximate fair values of our debt.
 December 31, 2021December 31, 2020
 Carrying
Value		Fair
Value		Carrying
Value		Fair
Value
 (In thousands)
Euro Tranche (significant other observable inputs – Level 2)$96,662 $96,541 $104,159 $103,574 
4.25% Senior Notes (quoted prices in active market for identical assets – Level 1)
$400,000 $414,152 $400,000 $409,880 
5.25% Senior Notes (quoted prices in active market for identical assets – Level 1)
$329,789 $339,228 $355,366 $367,886 
ABL Facility$— $— $— $— 
Finance lease obligations$3,163 $3,163 $835 $835 
KFPC Loan Agreement$17,853 $17,853 $52,730 $52,730 
KFPC Revolving Facilities$49,873 $49,873 $37,003 $37,003