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Quarterly Financial Information (Tables) | 12 Months Ended
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Dec. 31, 2018
Quarterly Financial Information Disclosure [Abstract] |
Schedule of Quarterly Financial Information | The following summary represents the unaudited quarterly results of operations for the years ended December 31, 2018 and 2017 (dollars in thousands, except per share data):
| For the three months ended (1)
| 3/31/18 |  | 6/30/18 |  | 9/30/18 |  | 12/31/18
Total revenue | $ | 560,792 |  |  | $ | 569,239 |  |  | $ | 575,982 |  |  | $ | 578,522 |
Net income | $ | 141,590 |  |  | $ | 254,543 |  |  | $ | 192,407 |  |  | $ | 385,636 |
Net income attributable to common stockholders | $ | 141,643 |  |  | $ | 254,662 |  |  | $ | 192,486 |  |  | $ | 385,734 |
Net income per common share - basic | $ | 1.03 |  |  | $ | 1.84 |  |  | $ | 1.39 |  |  | $ | 2.79 |
Net income per common share - diluted | $ | 1.03 |  |  | $ | 1.84 |  |  | $ | 1.39 |  |  | $ | 2.79 |
| For the three months ended (1)
| 3/31/17 |  | 6/30/17 |  | 9/30/17 |  | 12/31/17
Total revenue | $ | 522,326 |  |  | $ | 530,512 |  |  | $ | 550,500 |  |  | $ | 555,292 |
Net income | $ | 235,781 |  |  | $ | 165,194 |  |  | $ | 238,199 |  |  | $ | 237,486 |
Net income attributable to common stockholders | $ | 235,875 |  |  | $ | 165,225 |  |  | $ | 238,248 |  |  | $ | 237,573 |
Net income per common share - basic | $ | 1.72 |  |  | $ | 1.20 |  |  | $ | 1.73 |  |  | $ | 1.72 |
Net income per common share - diluted | $ | 1.72 |  |  | $ | 1.20 |  |  | $ | 1.72 |  |  | $ | 1.72 |
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(1) | Amounts may not equal full year results due to rounding.

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- Definition Tabular disclosure of quarterly financial data. Includes, but is not limited to, financial information for fiscal quarters, cumulative effect of a change in accounting principle and earnings per share data. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=109225645&loc=d3e1280-108306 + Details
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