Intangible Assets (Tables)

3 Months Ended

Mar. 31, 2020

Intangible Assets, Net (Excluding Goodwill) [Abstract]

Schedule of Components of Intangible Assets

The following table summarizes the components of our intangible assets at the dates indicated:

	March 31, 2020						December 31, 2019
	Gross Carrying Amount		Accumulated Amortization		Carrying Value		Gross Carrying Amount		Accumulated Amortization		Carrying Value
Marine contract intangibles	$	27,800	$	24,392	$	3,408	$	27,800	$	23,033	$	4,767
Offshore pipeline contract intangibles	158,101		38,832		119,269		158,101		36,752		121,349
Other	35,551		22,157		13,394		34,291		21,480		12,811
Total	$	221,452	$	85,381	$	136,071	$	220,192	$	81,265	$	138,927

Schedule of Amortization Expense

Our amortization of intangible assets for the periods presented was as follows:

	Three Months Ended March 31,
	2020		2019
Amortization of intangible assets	$	4,116	$	4,289

Schedule of Expected Amortization Expense

We estimate that our amortization expense for the next five years will be as follows:

Remainder of	2020	$	11,563
	2021	$	10,576
	2022	$	10,416
	2023	$	10,147
	2024	$	9,823