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INCOME TAXES (Details 3) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 12 Months Ended
Dec. 31, 2013
Sep. 30, 2013
Jun. 30, 2013
Mar. 31, 2013
Dec. 31, 2012
Sep. 30, 2012
Jun. 30, 2012
Mar. 31, 2012
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Reconciliation between the effective income tax rate, as computed on income or loss before income taxes, and the statutory federal income tax rate                      
Income tax provision (benefit) at the statutory federal rate                 $ 6,811 $ (5,947) $ 3,323
Federal income tax effects of:                      
State income taxes                 (359) 352 (316)
Nondeductible expenses                 1,090 1,415 1,079
Life insurance proceeds and changes in cash surrender value                 (1,320) (752) (906)
Dividends received deduction                 (9) (5) 0
Alternative fuel tax credit                 (1,935) 0 (995)
Decrease in valuation allowances                 (1,436) (3,180) (211)
Other                 (440) (539) (182)
Federal income tax provision (benefit)                 2,402 (8,656) 1,792
State income tax provision (benefit)                 1,026 (1,005) 902
Foreign income tax provision                 222 401 466
Total provision (benefit) for income taxes $ 3,549 $ 7,022 $ 2,987 $ (9,908) $ (4,387) $ 5,258 $ (5,757) $ (4,374) $ 3,650 $ (9,260) $ 3,160
Effective tax (benefit) rate (as a percent)                 18.80% (54.50%) 33.30%