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INCOME TAXES (RateRec) (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2015 | Sep. 30, 2015 | Jun. 30, 2015 | Mar. 31, 2015 | Dec. 31, 2014 | Sep. 30, 2014 | Jun. 30, 2014 | Mar. 31, 2014 | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Reconciliation between the effective income tax rate, as computed on income (loss) before income taxes, and the statutory federal income tax rate |  |  |  |  |  |  |  |  |  |  |
Income tax provision at the statutory federal rate |  |  |  |  |  |  |  |  | $ 25,457 | $ 24,714 | $ 6,811
Federal income tax effects of: |  |  |  |  |  |  |  |  |  |  |
State income taxes |  |  |  |  |  |  |  |  | (1,314) | (1,186) | (359)
Nondeductible expenses |  |  |  |  |  |  |  |  | 1,426 | 1,239 | 1,090
Life insurance proceeds and changes in cash surrender value |  |  |  |  |  |  |  |  | (110) | (1,329) | (1,320)
Dividends received deduction |  |  |  |  |  |  |  |  | (3) | (6) | (9)
Alternative fuel tax credit |  |  |  |  |  |  |  |  | (1,141) | (1,148) | (1,935)
Increase (decrease) in valuation allowances |  |  |  |  |  |  |  |  | 22 | (696) | (1,436)
Other |  |  |  |  |  |  |  |  | (2,267) | (1,950) | (440)
Federal income tax provision |  |  |  |  |  |  |  |  | 22,070 | 19,638 | 2,402
State income tax provision |  |  |  |  |  |  |  |  | 3,754 | 3,389 | 1,026
Foreign income tax provision |  |  |  |  |  |  |  |  | 2,056 | 1,408 | 222
Total provision (benefit) for income taxes | $ 1,878 | $ 12,892 | $ 12,942 | $ 167 | $ 5,097 | $ 12,938 | $ 10,163 | $ (3,762) | $ 27,880 | $ 24,435 | $ 3,650
Effective tax rate (as a percent) |  |  |  |  |  |  |  |  | 38.30% | 34.60% | 18.80%
Income taxes paid, excluding income tax refunds |  |  |  |  |  |  |  |  | $ 39,000 | $ 40,400 | $ 13,400
Income tax refunds |  |  |  |  |  |  |  |  | 21,300 | 11,900 | 8,100
Tax benefit of options exercised and dividends on share-based payment awards |  |  |  |  |  |  |  |  |  | $ 100 | $ 200
Maximum |  |  |  |  |  |  |  |  |  |  |
Federal income tax effects of: |  |  |  |  |  |  |  |  |  |  |
Tax benefit of options exercised and dividends on share-based payment awards |  |  |  |  |  |  |  |  | $ 100 |  |

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