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Quarterly Financial Data (unaudited) (Tables) | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013
Quarterly Financial Data | The following is unaudited quarterly data for 2014 and 2013 (amounts in thousands, except for per share amounts):
2014 |  | First Quarter 03/31 |  | Second Quarter 6/30 |  | Third Quarter 9/30 |  | Fourth Quarter 12/31
Total revenues |  | $ | 196,745 |  |  | $ | 189,025 |  |  | $ | 200,778 |  |  | $ | 190,261 |
Income from operations |  | $ | 73,730 |  |  | $ | 62,770 |  |  | $ | 67,545 |  |  | $ | 68,153 |
Consolidated net income |  | $ | 43,890 |  |  | $ | 30,040 |  |  | $ | 30,276 |  |  | $ | 34,262 |
Net income available for Common Shares |  | $ | 38,099 |  |  | $ | 25,483 |  |  | $ | 25,746 |  |  | $ | 29,403 |
Weighted average Common Shares outstanding—Basic |  | 83,116 |  |  | 83,234 |  |  | 83,531 |  |  | 83,562 |
Weighted average Common Shares outstanding—Diluted |  | 91,353 |  |  | 91,420 |  |  | 91,528 |  |  | 91,644 |
Net income per Common Share outstanding—Basic |  | $ | 0.46 |  |  | $ | 0.31 |  |  | $ | 0.31 |  |  | $ | 0.35 |
Net income per Common Share outstanding—Diluted |  | $ | 0.46 |  |  | $ | 0.30 |  |  | $ | 0.31 |  |  | $ | 0.35 |
2013 |  | First Quarter 03/31 |  | Second Quarter 6/30 |  | Third Quarter 9/30 |  | Fourth Quarter 12/31
Total revenues |  | $ | 183,908 |  |  | $ | 176,915 |  |  | $ | 188,161 |  |  | $ | 180,064 |
Income from operations |  | $ | 70,332 |  |  | $ | 56,597 |  |  | $ | 64,779 |  |  | $ | 62,843 |
Consolidated net income |  | $ | 40,470 |  |  | $ | 21,786 |  |  | $ | 34,936 |  |  | $ | 28,713 |
Net income available for Common Shares |  | $ | 35,027 |  |  | $ | 17,860 |  |  | $ | 29,872 |  |  | $ | 24,160 |
Weighted average Common Shares outstanding—Basic |  | 83,026 |  |  | 83,021 |  |  | 83,021 |  |  | 83,003 |
Weighted average Common Shares outstanding—Diluted |  | 91,060 |  |  | 91,128 |  |  | 91,259 |  |  | 91,334 |
Net income per Common Share outstanding—Basic |  | $ | 0.42 |  |  | $ | 0.22 |  |  | $ | 0.36 |  |  | $ | 0.29 |
Net income per Common Share outstanding—Diluted |  | $ | 0.42 |  |  | $ | 0.21 |  |  | $ | 0.36 |  |  | $ | 0.29 |
2013 |  | First Quarter 03/31 |  | Second Quarter 6/30 |  | Third Quarter 9/30 |  | Fourth Quarter 12/31
Total revenues |  | $ | 183,908 |  |  | $ | 176,915 |  |  | $ | 188,161 |  |  | $ | 180,064 |
Income from operations |  | $ | 70,332 |  |  | $ | 56,597 |  |  | $ | 64,779 |  |  | $ | 62,843 |
Consolidated net income |  | $ | 40,470 |  |  | $ | 21,786 |  |  | $ | 34,936 |  |  | $ | 28,713 |
Net income available for Common Shares |  | $ | 35,027 |  |  | $ | 17,860 |  |  | $ | 29,872 |  |  | $ | 24,160 |
Weighted average Common Shares outstanding—Basic |  | 83,026 |  |  | 83,021 |  |  | 83,021 |  |  | 83,003 |
Weighted average Common Shares outstanding—Diluted |  | 91,060 |  |  | 91,128 |  |  | 91,259 |  |  | 91,334 |
Net income per Common Share outstanding—Basic |  | $ | 0.42 |  |  | $ | 0.22 |  |  | $ | 0.36 |  |  | $ | 0.29 |
Net income per Common Share outstanding—Diluted |  | $ | 0.42 |  |  | $ | 0.21 |  |  | $ | 0.36 |  |  | $ | 0.29 |

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- Definition Tabular disclosure of the quarterly financial data in the annual financial statements. The disclosure includes financial information for each fiscal quarter for the current and previous year, including revenues, gross profit, income (loss) before extraordinary items and cumulative effect of a change in accounting principle and earnings per share data. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a)-(j) -URI http://asc.fasb.org/extlink&oid=35737889&loc=d3e1280-108306 + Details
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