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Unaudited Selected Quarterly Financial Data (Tables) | 12 Months Ended
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Dec. 31, 2020
Quarterly Financial Information Disclosure [Abstract] |
Selected quarterly financial data | Selected quarterly financial data is presented below.
($ in thousands, except per share data) |  | Three Months Ended
|  | December 31, |  | September 30, |  | June 30, |  | March 31,
2020 |  |  |  |  |  |  |  |
Insurance premiums and contract charges earned |  | $ | 233,648 |  |  | $ | 235,353 |  |  | $ | 225,431 |  |  | $ | 236,265 |
Insurance premiums written and contract deposits (2)(3) |  | 332,559 |  |  | 368,853 |  |  | 329,169 |  |  | 328,758 |
Total revenues |  | 352,344 |  |  | 337,080 |  |  | 314,459 |  |  | 306,558 |
Net income |  | 47,791 |  |  | 36,474 |  |  | 30,578 |  |  | 18,472 |
Per share information |  |  |  |  |  |  |  |
Basic |  |  |  |  |  |  |  |
Net income |  | $ | 1.14 |  |  | $ | 0.87 |  |  | $ | 0.73 |  |  | $ | 0.44 |
Shares of common stock - weighted average (4) |  | 41,962 |  |  | 41,916 |  |  | 41,879 |  |  | 41,827 |
Diluted |  |  |  |  |  |  |  |
Net income |  | $ | 1.13 |  |  | $ | 0.87 |  |  | $ | 0.73 |  |  | $ | 0.44 |
Shares of common stock and equivalent shares - weighted average (4) |  | 42,156 |  |  | 42,058 |  |  | 41,996 |  |  | 42,019 |
2019 |  |  |  |  |  |  |  |
Insurance premiums and contract charges earned (1) |  | $ | 240,392 |  |  | $ | 239,681 |  |  | $ | 208,096 |  |  | $ | 209,785 |
Insurance premiums written and contract deposits (1)(2)(3) |  | 346,242 |  |  | 371,216 |  |  | 311,691 |  |  | 295,394 |
Total revenues (1) |  | 331,376 |  |  | 334,418 |  |  | 451,478 |  |  | 313,213 |
Net income (1) |  | 33,001 |  |  | 25,454 |  |  | 93,822 |  |  | 32,166 |
Per share information |  |  |  |  |  |  |  |
Basic |  |  |  |  |  |  |  |
Net income (1) |  | $ | 0.79 |  |  | $ | 0.61 |  |  | $ | 2.25 |  |  | $ | 0.77 |
Shares of common stock - weighted average (4) |  | 41,814 |  |  | 41,785 |  |  | 41,762 |  |  | 41,610 |
Diluted |  |  |  |  |  |  |  |
Net income (1) |  | $ | 0.78 |  |  | $ | 0.60 |  |  | $ | 2.24 |  |  | $ | 0.77 |
Shares of common stock and equivalent shares - weighted average (4) |  | 42,093 |  |  | 42,030 |  |  | 41,921 |  |  | 41,785 |
2018 |  |  |  |  |  |  |  |
Insurance premiums and contract charges earned |  | $ | 201,905 |  |  | $ | 206,820 |  |  | $ | 205,610 |  |  | $ | 202,998 |
Insurance premiums written and contract deposits (2) |  | 311,216 |  |  | 338,097 |  |  | 301,722 |  |  | 284,008 |
Total revenues |  | 278,535 |  |  | 311,318 |  |  | 306,257 |  |  | 295,489 |
Net income |  | (20,257) |  |  | 12,528 |  |  | 5,917 |  |  | 20,155 |
Per share information |  |  |  |  |  |  |  |
Basic |  |  |  |  |  |  |  |
Net income (loss) |  | $ | (0.49) |  |  | $ | 0.30 |  |  | $ | 0.14 |  |  | $ | 0.49 |
Shares of common stock - weighted average (4) |  | 41,596 |  |  | 41,683 |  |  | 41,600 |  |  | 41,497 |
Diluted |  |  |  |  |  |  |  |
Net income (loss) |  | $ | (0.49) |  |  | $ | 0.30 |  |  | $ | 0.14 |  |  | $ | 0.48 |
Shares of common stock and equivalent shares - weighted average (4) |  | 41,911 |  |  | 41,850 |  |  | 41,735 |  |  | 41,653 |
(1) NTA was acquired on July 1, 2019. (2) This measure is not based on accounting principles generally accepted in the United States of America (non-GAAP). An explanation of this measure is contained in the Glossary of Selected Terms included as an exhibit in the Company's reports filed with the SEC. (3) Excludes the annuity reinsurance transaction accounted for under the deposit method that is discussed in Note 5. (4) Rounded to thousands.

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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=121640914&loc=d3e1280-108306 + Details
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