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Earnings per Share (Tables) | 6 Months Ended
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Jun. 30, 2019
Schedule of computations of basic and diluted earnings per share | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended June 30, | ​ | Six Months Ended June 30,
(dollars in thousands, except shares and per share amounts) |  | 2019 |  | 2018 |  | 2019 |  | 2018
Numerator: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Net income | ​ | $ | 72,433 | ​ | $ | 69,053 | ​ | $ | 142,357 | ​ | $ | 137,011
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Denominator: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Basic: weighted-average shares outstanding | ​ | ​ | 134,420,380 | ​ | ​ | 137,907,063 | ​ | ​ | 134,655,217 | ​ | ​ | 138,749,209
Add: weighted-average equity-based awards | ​ | ​ | 231,628 | ​ | ​ | 158,816 | ​ | ​ | 269,114 | ​ | ​ | 142,746
Diluted: weighted-average shares outstanding | ​ | ​ | 134,652,008 | ​ | ​ | 138,065,879 | ​ | ​ | 134,924,331 | ​ | ​ | 138,891,955
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Basic earnings per share | ​ | $ | 0.54 | ​ | $ | 0.50 | ​ | $ | 1.06 | ​ | $ | 0.99
Diluted earnings per share | ​ | $ | 0.54 | ​ | $ | 0.50 | ​ | $ | 1.06 | ​ | $ | 0.99
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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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Namespace Prefix: | us-gaap_
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Balance Type: | na
Period Type: | duration