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Schedule II - Condensed Statement of Income (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Condensed Financial Statements, Captions [Line Items] |  |  |
Interest and dividends | $ 4,619 | $ 4,445 | $ 4,684
Net realized gain (loss) on investments | 110 | (1,041) | (768)
Net unrealized loss on equity investments | (4,130) | 0 | 0
Other | 470 | 460 | 437
Total Revenues | 156,259 | 161,627 | 138,488
Personnel expenses | 43,552 | 39,937 | 31,479
Office and technology expenses | 8,813 | 8,172 | 6,446
Other expenses | 11,382 | 11,293 | 8,546
Income before Income Taxes | 27,069 | 30,271 | 28,131
Income Tax Benefit | 5,210 | 4,570 | 8,616
Net Income | 21,859 | 25,701 | 19,515
Net Loss Attributable to Noncontrolling Interests | (33) | (6) | (8)
Net Income Attributable to the Company | $ 21,892 | $ 25,707 | $ 19,523
Basic Earnings per Common Share | $ 11.60 | $ 13.63 | $ 10.23
Weighted Average Shares Outstanding – Basic | 1,887 | 1,886 | 1,908
Diluted Earnings per Common Share | $ 11.54 | $ 13.56 | $ 10.19
Weighted Average Shares Outstanding – Diluted | 1,897 | 1,896 | 1,915
Common Stock, Dividends, Per Share, Declared | $ 12.20 | $ 3.75 | $ 0.72
Parent Company |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |
Interest and dividends | $ 668 | $ 502 | $ 525
Net realized gain (loss) on investments | (27) | (36) | (78)
Net unrealized loss on equity investments | (384) | 0 | 0
Rental income | 842 | 813 | 772
Other | 930 | 220 | 77
Total Revenues | 2,083 | 1,571 | 1,452
Personnel expenses | 1,085 | 1,004 | 667
Office and technology expenses | 355 | 349 | 366
Other expenses | 892 | 763 | 775
Total Operating Expenses | 2,332 | 2,116 | 1,808
Equity in Net Income of Affiliated Companies | 22,014 | 25,634 | 19,665
Income before Income Taxes | 21,765 | 25,089 | 19,309
Income Tax Benefit | (94) | (612) | (206)
Net Income | 21,859 | 25,701 | 19,515
Net Loss Attributable to Noncontrolling Interests | (33) | (6) | (8)
Net Income Attributable to the Company | $ 21,892 | $ 25,707 | $ 19,523
Basic Earnings per Common Share | $ 11.60 | $ 13.63 | $ 10.23
Weighted Average Shares Outstanding – Basic | 1,887 | 1,886 | 1,908
Diluted Earnings per Common Share | $ 11.54 | $ 13.56 | $ 10.19
Weighted Average Shares Outstanding – Diluted | 1,897 | 1,896 | 1,915

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