CONSOLIDATED STATEMENTS OF INCOME (USD $)
In Thousands, except Share data, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
CONSOLIDATED STATEMENTS OF INCOME      
OPERATING REVENUES $ 552,091 $ 588,117 $ 589,009
OPERATING EXPENSES:      
Voyage expenses (12,974) (11,770) (13,503)
Vessel operating expenses (113,755) (122,074) (123,356)
Depreciation (137,061) (137,414) (143,938)
Amortization of deferred drydocking and special survey costs (4,387) (5,482) (6,070)
Impairment loss (75,776) (19,004) (129,630)
General and administrative expenses (21,442) (19,458) (20,379)
Gain / (Loss) on sale of vessels 5,709 (449) 830
Income from operations 192,405 272,466 152,963
OTHER INCOME (EXPENSES):      
Interest income 1,703 2,210 1,642
Interest expense (79,980) (91,185) (87,340)
Other finance expenses (19,757) (20,120) (18,107)
Other income/(expenses), net 422 302 811
Unrealized and realized losses on derivatives (98,713) (126,150) (155,173)
Total Other Expenses, net (196,325) (234,943) (258,167)
Net Income/(Loss) $ (3,920) $ 37,523 $ (105,204)
EARNINGS/(LOSS) PER SHARE      
Basic and diluted net income/(loss) per share (in dollars per share) $ (0.04) $ 0.34 $ (0.96)
Basic and diluted weighted average number of shares (in shares) 109,676,056 109,654,199 109,612,737