INVESTMENTS - AVAILABLE FOR SALE AND HELD TO MATURITY (Details) $ in Thousands |
Sep. 30, 2016
USD ($)
|
|---|---|
| Available-for-sale, Amortized Cost | |
| Within 1 year | $ 253,081 |
| After 1 year through 5 years | 165,704 |
| Total | 418,785 |
| Available-for-sale, Estimated Fair Value | |
| Within 1 year | 253,156 |
| After 1 year through 5 years | 165,827 |
| Total | 418,983 |
| Held-to-maturity, Amortized Cost | |
| Within 1 year | 1,715 |
| After 1 year through 5 years | 1,667 |
| Total | 3,382 |
| Held-to-maturity, Estimated Fair Value | |
| Within 1 year | 1,715 |
| After 1 year through 5 years | 1,667 |
| Estimated Fair Value | $ 3,382 |