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Quarterly Financial Information | 12 Months Ended
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Dec. 31, 2016
Quarterly Financial Information Disclosure [Abstract] |
Quarterly Financial Information | 18. Quarterly Financial Information (in thousands, except per share amounts) (unaudited)
|  | 1st |  |  | 2nd |  |  | 3rd |  |  | 4th |
|  | Quarter |  |  | Quarter |  |  | Quarter |  |  | Quarter |
2016 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Operating revenues |  | $ | 268,939 |  |  | $ | 193,907 |  |  | $ | 206,133 |  |  | $ | 246,887 |
Operating loss |  |  | (95,259 | ) |  |  | (124,332 | ) |  |  | (123,409 | ) |  |  | (113,226 | )
Net loss |  |  | (70,503 | ) |  |  | (85,866 | ) |  |  | (84,143 | ) |  |  | (78,122 | )
Net loss per common share: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic |  | $ | (0.48 | ) |  | $ | (0.58 | ) |  | $ | (0.58 | ) |  | $ | (0.53 | )
Diluted |  | $ | (0.48 | ) |  | $ | (0.58 | ) |  | $ | (0.58 | ) |  | $ | (0.53 | )
2015 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Operating revenues |  | $ | 657,699 |  |  | $ | 472,761 |  |  | $ | 422,251 |  |  | $ | 338,566 |
Operating income (loss) |  |  | 24,103 |  |  |  | (24,764 | ) |  |  | (329,515 | ) |  |  | (76,796 | )
Net income (loss) |  |  | 9,125 |  |  |  | (18,975 | ) |  |  | (225,978 | ) |  |  | (58,658 | )
Net income (loss) per common share: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic |  | $ | 0.06 |  |  | $ | (0.13 | ) |  | $ | (1.54 | ) |  | $ | (0.40 | )
Diluted |  | $ | 0.06 |  |  | $ | (0.13 | ) |  | $ | (1.54 | ) |  | $ | (0.40 | )

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- Definition The entire disclosure for quarterly financial data. Includes, but is not limited to, tabular presentation of financial information for fiscal quarters, effect of year-end adjustments, and an explanation of matters or transactions that affect comparability of the information. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=68076893&loc=d3e1570-108306 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 45 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=68064558&loc=d3e765-108305 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=68064558&loc=d3e725-108305 + Details
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