Fair Value of Financial Instruments - Fair Value (Table) (Details) - USD ($)
$ in Thousands |
Jun. 30, 2017 |
Dec. 31, 2016 |
Jun. 30, 2016 |
Dec. 31, 2015 |
| Financial Instruments Owned At Fair Value [Abstract] |
|
|
|
|
| Cash and cash equivalents - Book Value |
$ 130,208
|
$ 135,992
|
$ 140,529
|
$ 163,412
|
| Cash and cash equivalents - Fair Value |
130,208
|
135,992
|
|
|
| Restricted cash - Book Value |
4,462
|
5,386
|
$ 2,671
|
|
| Restricted cash - Fair Value |
4,462
|
5,386
|
|
|
| Loan receivable from affiliate companies - Book Value |
28,727
|
23,008
|
|
|
| Loan receivable from affiliate companies - Fair Value |
28,727
|
23,008
|
|
|
| Long-term receivable from affiliate companies - Book Value |
0
|
11,105
|
|
|
| Long-term receivable from affiliate companies - Fair Value |
0
|
11,105
|
|
|
| Capital lease obligations, including current portion - Book Value |
0
|
(17,617)
|
|
|
| Capital lease obligations, including current portion - Fair Value |
0
|
(17,617)
|
|
|
| Senior and ship mortgage notes, net - Book Value |
(1,298,452)
|
(1,296,537)
|
|
|
| Senior and ship mortgage notes, net - Fair Value |
(1,133,600)
|
(974,170)
|
|
|
| Long-term debt, including current portion - Book Value |
(295,327)
|
(304,682)
|
|
|
| Long-term debt, including current portion - Fair Value |
(298,468)
|
(308,080)
|
|
|
| Loan payable to affiliate company - Book Value |
(52,491)
|
(49,876)
|
|
|
| Loan payable to affiliate company - Fair Value |
(53,494)
|
(51,240)
|
|
|
| Long term payable to affiliate companies - Book Value |
(68,491)
|
(6,399)
|
|
|
| Long term payable to affiliate companies - Fair Value |
$ (68,491)
|
$ (6,399)
|
|
|