Intangible Assets - Navios Partners (Table) (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
Jun. 30, 2019	Dec. 31, 2018	Dec. 31, 2017
INTANGIBLE ASSETS [Abstract]
Favorable lease terms - Cost	$ 83,716	$ 83,716	$ 83,716
Favorable lease terms - Accumulated amortization	(79,967)	(79,384)	(75,636)
Additions - Accumulated Amortization	(583)	(3,748)
Favorable lease terms - Net Book Value	3,749	4,332	$ 8,080
Additions - Net Book Value	$ (583)	$ (3,748)

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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Amount of increase (decrease) in carrying value of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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