CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
OPERATING ACTIVITIES:    
Net loss $ (29,166) $ (47,787)
Adjustments to reconcile net loss to net cash provided by operating activities:    
Non-cash adjustments 50,995 42,564
(Increase)/decrease in operating assets (11,776) 59,508
Increase/(decrease) in operating liabilities 33,156 (36,630)
Payments for drydock and special survey costs (3,072) (15,916)
Net cash provided by operating activities 40,137 1,739
INVESTING ACTIVITIES:    
Acquisition of investments in affiliates 0 (20,471)
Acquisition of vessels (60,115) 0
Deposits for vessels, port terminals and other fixed assets acquisition (44,628) (6,625)
Dividends from affiliate companies 0 7,298
Loan to affiliate company (4,275) (3,289)
Decrease in long-term receivable from affiliate companies 0 9,488
Purchase of property, equipment and other fixed assets (3,301) (4,577)
Net cash used in investing activities (112,319) (18,176)
FINANCING ACTIVITIES:    
Repayment of long-term debt and payment of principal (18,115) (31,022)
Proceeds from long-term loans, net of deferred finance fees 63,008 0
Dividends paid (3,681) (20,644)
Acquisition of treasury stock (819) 0
Payments of obligations under capital leases (2,094) (709)
Decrease in restricted cash 11,000 1,622
Net cash provided by/(used in) financing activities 49,299 (50,753)
Decrease in cash and cash equivalents (22,883) (67,190)
Cash and cash equivalents, beginning of period 163,412 247,556
Cash and cash equivalents, end of period 140,529 180,366
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION    
Cash paid for interest, net of capitalized interest 54,180 54,636
Cash paid for income taxes 92 29
Non-cash investing and financing activities    
Dividends payable 0 162
Accrued interest on loan receivable from affiliate company 1,078 383
Acquisition of vessels, port terminals and other fixed assets (100) (1,211)
Deposits for vessels, port terminals and other fixed assets (2,787) 0
Revaluation of vessels due to restructuring of capital lease obligation 0 210
Decrease in capital lease obligation due to restructuring $ 0 $ (210)