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Intangible Assets, Goodwill and Other Assets (Tables)
 12 Months Ended
Dec. 31, 2021
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of Intangible Assets
The following table reflects the components of intangible assets being amortized at December 31, 2021 and 2020:
  December 31, 2021December 31, 2020
 Weighted
Amortization
Period in Years		Gross
Carrying
Amount		Accumulated
Amortization		Carrying
Value		Gross
Carrying
Amount		Accumulated
Amortization		Carrying
Value
Marine contract intangibles20$800 $607 $193 $800 $571 $229 
Offshore pipeline contract intangibles19158,101 53,394 104,707 158,101 45,073 113,028 
Other937,933 15,770 22,163 29,244 13,759 15,485 
Total$196,834 $69,771 $127,063 $188,145 $59,403 $128,742 
Schedule of Estimated Amortization Expense
The following table reflects our estimated amortization expense for each of the five subsequent fiscal years:
 
20222023202420252026
Marine contract intangibles$35 $34 $33 $32 $30 
Offshore pipeline contract intangibles8,321 8,321 8,321 8,321 8,321 
Other3,414 3,147 2,783 2,560 2,261 
Total$11,770 $11,502 $11,137 $10,913 $10,612 
Schedule of Other Assets
Other assets consisted of the following:
 December 31,
 20212020
Deferred marine charges, net (1)
$19,930 $20,714 
Long-term contract assets (2)
— 12,065 
Unamortized debt issuance costs on Revolving Loan4,736 5,842 
Other deferred costs13,593 7,226 
Other assets, net of amortization$38,259 $45,847 
(1)    See discussion of deferred charges on marine transportation assets in the Summary of Accounting Policies (Note 2).
(2)    See Revenue Recognition (Note 3) for discussion on the circumstances that result in the recognition of contract assets.