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INCOME TAXES - Provision for Income Taxes (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2016 | Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2015 | Sep. 30, 2015 | Jun. 30, 2015 | Mar. 31, 2015 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Current: |  |  |  |  |  |  |  |  |  |  |
Federal tax expense |  |  |  |  |  |  |  |  | $ 6,758 | $ 4,696 | $ 294
State tax expense |  |  |  |  |  |  |  |  | 1,101 | (1,631) | 305
Total current expense |  |  |  |  |  |  |  |  | 7,859 | 3,065 | 599
Deferred: |  |  |  |  |  |  |  |  |  |  |
Federal tax expense |  |  |  |  |  |  |  |  | 9,438 | 2,023 | 8,685
State tax expense |  |  |  |  |  |  |  |  | 1,591 | (24) | 2,509
Total deferred tax expense |  |  |  |  |  |  |  |  | 11,029 | 1,999 | 11,194
Change in valuation allowance |  |  |  |  |  |  |  |  | (104) | 0 | (30)
Income tax expense | $ 362 | $ 6,953 | $ 5,249 | $ 6,220 | $ 2,273 | $ 1,350 | $ 1,144 | $ 297 | $ 18,784 | $ 5,064 | $ 11,763

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