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Equity method investment (Tables) | 12 Months Ended
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Dec. 31, 2018
Equity Method Investments and Joint Ventures [Abstract] |
Equity Method Investments | A summary of BHG's financial position and results of operations as of and for the years ended December 31, 2018 and 2017, respectively, were as follows (unaudited, in thousands):
Banker's Healthcare Group |  |  |
| December 31, 2018 |  | December 31, 2017
Assets | $ | 459,816 |  |  | $ | 330,030 |
Liabilities | $ | 324,211 |  |  | $ | 224,837 |
Equity interests | 135,605 |  |  | 105,193 |
Total liabilities and equity | $ | 459,816 |  |  | $ | 330,030 |
| For the year ended December 31,
| 2018 |  | 2017 |  | 2016
Revenues | $ | 220,253 |  |  | $ | 160,209 |  |  | $ | 136,693 |
Net income, pre-tax | $ | 104,297 |  |  | $ | 77,941 |  |  | $ | 67,135 |

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- Definition Tabular disclosure of equity method investments including, but not limited to, name of each investee or group of investments, percentage ownership, difference between recorded amount of an investment and the value of the underlying equity in the net assets, and summarized financial information. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571 + Details
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