Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands |
Dec. 31, 2016 |
Dec. 31, 2015 |
|---|---|---|
| Investments: | ||
| Securities held to maturity-fair value | $ 7,337,611 | $ 7,335,436 |
| Securities available for sale-amortized cost | 2,991,042 | 2,847,414 |
| Mortgage loans-allowance for possible losses | $ 650 | $ 650 |
| Common Class A | ||
| STOCKHOLDERS’ EQUITY: | ||
| Common stock, par value (usd per share) | $ 0.01 | $ 0.01 |
| Common Stock, shares authorized | 7,500,000 | 7,500,000 |
| Common Stock, shares issued | 3,436,166 | 3,436,166 |
| Common Stock, shares outstanding | 3,436,166 | 3,436,166 |
| Common Class B | ||
| STOCKHOLDERS’ EQUITY: | ||
| Common stock, par value (usd per share) | $ 0.01 | $ 0.01 |
| Common Stock, shares authorized | 200,000 | 200,000 |
| Common Stock, shares issued | 200,000 | 200,000 |
| Common Stock, shares outstanding | 200,000 | 200,000 |