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FAIR VALUE MEASUREMENTS - Changes in Level 3 (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018
Commitments to lend |  |  |  |
Changes in Level 3 assets that were measured at fair value on a recurring basis |  |  |  |
Unrealized gains (losses) relating to instruments still held at the end of the period | $ 9,005 | $ 7,285 | $ 9,005 | $ 7,285
Derivative Asset (Liability) |  |  |  |
Beginning balance | 6,318 | 6,531 | 3,927 | 5,259
Unrealized gain/(loss), net recognized in other non-interest income |  | 0 |  | 0
Transfers to held for sale loans | (14,430) | (12,033) | (23,260) | (22,974)
Ending balance | 9,005 | 7,285 | 9,005 | 7,285
Forward commitments |  |  |  |
Changes in Level 3 assets that were measured at fair value on a recurring basis |  |  |  |
Unrealized gains (losses) relating to instruments still held at the end of the period | 0 | 0 | 0 | 0
Derivative Asset (Liability) |  |  |  |
Beginning balance | 0 | 0 | 0 | 19
Unrealized gain/(loss), net recognized in other non-interest income |  | 0 |  | (19)
Ending balance | 0 | 0 | 0 | 0
Trading Security |  |  |  |
Changes in Level 3 assets that were measured at fair value on a recurring basis |  |  |  |
Balance at the beginning of the period | 11,164 | 11,795 | 11,212 | 12,277
Unrealized gain/(loss), net recognized in other non-interest income | 219 | (148) | 345 | (465)
Paydown of trading security | (173) | (164) | (347) | (329)
Balance at the end of the period | 11,210 | 11,483 | 11,210 | 11,483
Unrealized gains (losses) relating to instruments still held at the end of the period | 1,466 | 1,056 | 1,466 | 1,056
Capitalized servicing rights |  |  |  |
Changes in Level 3 assets that were measured at fair value on a recurring basis |  |  |  |
Balance at the beginning of the period | 11,351 | 5,705 | 11,485 | 3,834
Unrealized gain/(loss), net recognized in other non-interest income |  | 0 |  | 0
Additions to servicing rights | 1,827 | 1,795 | 2,835 | 3,201
Balance at the end of the period | 11,206 | 7,839 | 11,206 | 7,839
Unrealized gains (losses) relating to instruments still held at the end of the period | 0 | 0 | 0 | 0
Discontinued Operations | Commitments to lend |  |  |  |
Derivative Asset (Liability) |  |  |  |
Unrealized gain/(loss), net recognized in other non-interest income | 17,117 | 12,787 | 28,338 | 25,000
Discontinued Operations | Forward commitments |  |  |  |
Derivative Asset (Liability) |  |  |  |
Unrealized gain/(loss), net recognized in other non-interest income |  | 0 |  | 0
Discontinued Operations | Trading Security |  |  |  |
Changes in Level 3 assets that were measured at fair value on a recurring basis |  |  |  |
Unrealized gain/(loss), net recognized in other non-interest income |  | 0 |  | 0
Discontinued Operations | Capitalized servicing rights |  |  |  |
Changes in Level 3 assets that were measured at fair value on a recurring basis |  |  |  |
Unrealized gain/(loss), net recognized in other non-interest income | $ (1,972) | $ 339 | $ (3,114) | $ 804

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