Unrealized Gain (Loss) on Investments [Table Text Block] |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Corporate Bonds | | $ | 140,442 | | | $ | 37 | | | $ | 1,404 | | | $ | 139,075 | | Certificates of Deposit | | | 2,880 | | | | - | | | | 8 | | | | 2,872 | | Total marketable securities held to maturity | | $ | 143,322 | | | $ | 37 | | | $ | 1,412 | | | $ | 141,947 | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Mutual Funds | | $ | 5,552 | | | $ | - | | | $ | 485 | | | $ | 5,067 | | Preferred Stock | | | 15,681 | | | | 21 | | | | 375 | | | | 15,327 | | Total marketable securities available for sale | | $ | 21,233 | | | $ | 21 | | | $ | 860 | | | $ | 20,394 | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Corporate Bonds | | $ | 136,933 | | | $ | 28 | | | $ | 1,520 | | | $ | 135,441 | | Certificates of Deposit | | | 2,880 | | | | - | | | | 7 | | | | 2,873 | | Total marketable securities held to maturity | | $ | 139,813 | | | $ | 28 | | | $ | 1,527 | | | $ | 138,314 | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Mutual Funds | | $ | 8,978 | | | $ | - | | | $ | 295 | | | $ | 8,683 | | Preferred Stock | | | 15,680 | | | | 380 | | | | - | | | | 16,060 | | Total marketable securities available for sale | | $ | 24,658 | | | $ | 380 | | | $ | 295 | | | $ | 24,743 | |
|
Investments Classified by Contractual Maturity Date [Table Text Block] |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Due in one year or less | | $ | 12,465 | | | $ | 12,399 | | | $ | 21,048 | | | $ | 21,001 | | Due after one year through five years | | | 130,857 | | | | 129,548 | | | | 118,765 | | | | 117,314 | | Due after five years through ten years | | | - | | | | - | | | | - | | | | - | | Total held to maturity securities | | $ | 143,322 | | | $ | 141,947 | | | $ | 139,813 | | | $ | 138,315 | | Less current portion | | | 12,465 | | | | 12,399 | | | | 21,048 | | | | 21,001 | | Long term held to maturity securities | | $ | 130,857 | | | $ | 129,548 | | | $ | 118,765 | | | $ | 117,314 | |
|