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Intangible Assets
 3 Months Ended
Mar. 31, 2023
Intangible Assets, Net (Excluding Goodwill) [Abstract]  
Intangible Assets Intangible Assets
The following table summarizes the components of our intangible assets at the dates indicated:
 
 March 31, 2023December 31, 2022
 Gross
Carrying
Amount		Accumulated
Amortization		Carrying
Value		Gross
Carrying
Amount		Accumulated
Amortization		Carrying
Value
Marine contract intangibles$800 $651 $149 $800 $642 $158 
Offshore pipeline contract intangibles158,101 63,795 94,306 158,101 61,715 96,386 
Other47,136 14,130 33,006 44,391 13,615 30,776 
Total$206,037 $78,576 $127,461 $203,292 $75,972 $127,320 

Our amortization of intangible assets for the periods presented was as follows:
Three Months Ended
March 31,
20232022
Amortization of intangible assets$2,705 $2,588 
We estimate that our amortization expense for the next five years will be as follows:
Remainder of2023$9,616 
202412,514 
202512,253 
202611,941 
202711,495