Intangible Assets, Goodwill and Other Assets (Tables)

12 Months Ended

Dec. 31, 2018

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Intangible Assets

The following table reflects the components of intangible assets being amortized at December 31, 2018 and 2017:

		December 31, 2018						December 31, 2017
	Weighted Amortization Period in Years	Gross Carrying Amount		Accumulated Amortization		Carrying Value		Gross Carrying Amount		Accumulated Amortization		Carrying Value
Sodium Minerals and Sulfur Services:
Customer relationships	5	$	94,654	$	94,654	$	—	$	94,654	$	92,493	$	2,161
Licensing agreements	6	38,678		38,678		—		38,678		36,528		2,150
Non-compete agreement	3	800		356		444		800		89		711
Segment total		134,132		133,688		444		134,132		129,110		5,022
Onshore Facilities & Transportation:
Customer relationships	5	35,430		35,123		307		35,430		35,082		348
Intangibles associated with lease	15	13,260		5,407		7,853		13,260		4,933		8,327
Segment total		48,690		40,530		8,160		48,690		40,015		8,675
Marine contract intangible	5	27,000		17,100		9,900		27,000		11,700		15,300
Offshore pipeline contract intangibles	19	158,101		28,431		129,670		158,101		20,109		137,992
Other	5	30,947		16,519		14,428		28,900		13,483		15,417
Total		$	398,870	$	236,268	$	162,602	$	396,823	$	214,417	$	182,406

Schedule of Estimated Amortization Expense

The following table reflects our estimated amortization expense for each of the five subsequent fiscal years:

	2019		2020		2021		2022		2023
Sodium Minerals and Sulfur Services:
Non Compete	267		177		—		—		—
Onshore Facilities & Transportation:
Customer relationships	39		38		37		35		34
Intangibles associated with lease	474		474		474		474		474
Marine contract intangibles	5,400		4,500		—		—		—
Offshore pipeline contract intangibles	8,321		8,321		8,321		8,321		8,321
Other	3,153		3,132		2,011		1,853		1,568
Total	$	17,654	$	16,642	$	10,843	$	10,683	$	10,397

Schedule of Other Assets

Other assets consisted of the following:

	December 31,
	2018		2017
CO2 volumetric production payments, net of amortization	$	890	$	2,175
Deferred marine charges, net (1)	28,175		30,246
Contract assets (2)	72,241		—
Other deferred costs and deposits	20,401		24,207
Other assets, net of amortization	$	121,707	$	56,628

(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.