Revenues: Contract drilling. Revenues related to reimbursable expenses ...... Year Ended December 31, 2015 2014 2013 $ 2,360,184 $ 2,737,126 $ 2,843,584 59,209 77,545 76,837 2,419,393 2,814,671 2,920,421 Total revenues Operating expenses: Contract drilling, excluding depreciation. 1,227,864 1,523,623 1,572,525 Reimbursable expenses. Depreciation..... 58,050 76,091 74,967 493,162 456,483 388,092 General and administrative. 66,462 81,832 64,788 Impairment of assets. 860,441 109,462 Bad debt expense 22,513 Restructuring and separation costs. 9,778 Gain on disposition of assets. (2,290) (5,382) (4,070) Total operating expenses 2,713,467 2,242,109 2,118,815 Operating (loss) income. (294,074) 572,562 801,606 Other income (expense): Interest income... Interest expense, net of amounts capitalized. Foreign currency transaction gain (loss) Other, net 3,322 (93,934) 801 (62,053) 701 (24,843) 2,465 3,199 (4,915) 873 682 1,691 (Loss) income before income tax benefit (expense)......... (381,348) 515,191 774,240 Income tax benefit (expense).. 107,063 (128,180) (225,554) Net (loss) income (274,285) $ 387,011 $ 548,686 (Loss) earnings per share: Basic Diluted. $ (2.00) $ 2.82 $ 3.95 (2.00) $ 2.81 3.95 Weighted-average shares outstanding: Shares of common stock. 137,157 137,473 139,035 Dilutive potential shares of common stock. 50 29 Total weighted-average shares outstanding Cash dividends declared per share of common stock.. 137,157 137,523 139,064 0.50 3.50 3.50