Intangible Assets/Liabilities Other Than Goodwill (Table) (Details) - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Trade name    
Acquired Finite Lived Intangible Assets [Line Items]    
Acquisition Cost $ 100,420 $ 100,420
Accumulated Amortization (45,156) (41,303)
Write off 0 0
Net Book Value 55,264 59,117
Port terminal operating rights    
Acquired Finite Lived Intangible Assets [Line Items]    
Acquisition Cost 53,152 53,152
Accumulated Amortization (10,889) (10,162)
Write off 0 0
Net Book Value 42,263 42,990
Customer relationships    
Acquired Finite Lived Intangible Assets [Line Items]    
Acquisition Cost 35,490 35,490
Accumulated Amortization (17,745) (15,971)
Write off 0 0
Net Book Value 17,745 19,519
Favorable lease terms    
Acquired Finite Lived Intangible Assets [Line Items]    
Acquisition Cost [1] 11,548 82,485
Accumulated Amortization [1] 0 (6,359)
Write off [1] (10,398) (70,937)
Net Book Value [1] 1,150 5,189
Total Intangible assets    
Acquired Finite Lived Intangible Assets [Line Items]    
Acquisition Cost 200,610 271,547
Accumulated Amortization (73,790) (73,795)
Write off (10,398) (70,937)
Net Book Value $ 116,422 126,815
Unfavorable lease terms    
Acquired Finite Lived Intangible Assets [Line Items]    
Acquisition Cost   (24,721)
Accumulated Amortization [2]   0
Write off [2]   24,721
Net Book Value [2]   0
Total    
Acquired Finite Lived Intangible Assets [Line Items]    
Acquisition Cost   246,826
Accumulated Amortization   (73,795)
Write off   (46,216)
Net Book Value   $ 126,815
[1] As of December 31, 2017 and 2016, intangible assets associated with the favorable lease terms included an amount of $1,150 and $1,180, respectively related to purchase options for the vessels (see also Note 2(n)). During the year ended December 31, 2017, acquisition costs of $10,398 and accumulated amortization of $7,001 of favorable lease terms considered impaired and were written off resulting in a loss of $3,397. During the year ended December 31, 2016, acquisition costs of $70,937 and accumulated amortization of $57,930 of favorable lease terms were written off resulting in a loss of $13,007. This write-off resulted from the early redelivery of one vessel.
[2] As of December 31, 2016, the intangible liability associated with the unfavorable lease terms included an amount of $0, related to purchase options held by third parties (see also Note 2(n)). During the year ended December 31, 2016, acquisition costs of $24,721 and accumulated amortization of $17,406 of unfavorable lease terms were written off resulting in an income of $7,315. This write-off resulted from the early redelivery of one vessel. As of December 31, 2016, no purchase options held by third parties have been exercised.