FAIR VALUE OF FINANCIAL INSTRUMENTS- Unobservable inputs (Level 3) (Details) - USD ($)
$ in Thousands |
12 Months Ended |
Dec. 31, 2016 |
Dec. 31, 2015 |
| Corporate securities |
|
|
| Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |
|
|
| Transferred from Level 2 |
$ 6,749
|
|
| Transferred to Level 2 |
(2,000)
|
|
| Purchases of investment securities recognized as Level 3 |
3,000
|
|
| Total realized in earnings |
343
|
|
| Total unrealized in other comprehensive income |
(305)
|
|
| Net settlements (principal and interest) |
(307)
|
|
| Ending balance |
7,480
|
|
| Non-agency mortgage-backed securities |
|
|
| Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |
|
|
| Transferred from Level 2 |
2
|
|
| Net settlements (principal and interest) |
(1)
|
|
| Ending balance |
$ 1
|
|
| Covered non-agency mortgage-backed securities |
|
|
| Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |
|
|
| Beginning balance |
|
$ 56,437
|
| Transferred to Level 2 |
|
(55,910)
|
| Total realized in earnings |
|
1,487
|
| Net settlements (principal and interest) |
|
$ (2,014)
|