INVESTMENT SECURITIES - ROLLFORWARD OF CREDIT LOSSES (Details) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
|
| Bank's private label mortgage backed security credit losses recognized in earnings | |||
| Available-for-sale Securities | $ 481,275 | $ 517,058 | |
| Private label mortgage backed security | |||
| Bank's private label mortgage backed security credit losses recognized in earnings | |||
| Available-for-sale Securities | $ 4,777 | 5,132 | |
| Estimated average life | 4 years | ||
| Rollforward of the Bank's private label mortgage backed security credit losses recognized in earnings | |||
| Balance, beginning of period | $ 1,765 | 1,800 | $ 1,941 |
| Recovery of losses previously recorded | (35) | (141) | |
| Balance, end of period | 1,765 | $ 1,765 | $ 1,800 |
| Additional impairment charge that may be recognized | $ 3,700 | ||