INCOME TAXES - Statutory federal rate (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 |
|
| INCOME TAXES | |||||||||||
| Expected income taxes | $ 17,648 | $ 12,424 | $ 5,414 | ||||||||
| Less income tax effect of: | |||||||||||
| Tax exempt interest | (1,670) | (1,934) | (1,809) | ||||||||
| Interest expense disallowance | 33 | 29 | 38 | ||||||||
| State tax, net of federal benefit | 3,132 | 1,292 | 1,540 | ||||||||
| Increase in cash surrender value of life insurance policies | (1,007) | (516) | (373) | ||||||||
| Indemnification income | (311) | ||||||||||
| Valuation allowance | 631 | ||||||||||
| Other | 122 | 107 | (159) | ||||||||
| Actual income tax expense | $ 8,327 | $ 4,102 | $ 3,683 | $ 2,777 | $ 2,811 | $ 1,928 | $ 2,762 | $ 3,590 | $ 18,889 | $ 11,091 | $ 4,651 |