XML 28 R73.htm IDEA: XBRL DOCUMENT v2.4.0.8
STOCKHOLDERS' EQUITY (Details 4) (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
Unrecognized net periodic benefit costs:                      
INCOME (LOSS) BEFORE INCOME TAXES                 $ 19,461 $ (16,992) $ 9,493
Tax benefit (3,549) (7,022) (2,987) 9,908 4,387 (5,258) 5,757 4,374 (3,650) 9,260 (3,160)
NET INCOME (LOSS) ATTRIBUTABLE TO ARKANSAS BEST CORPORATION 10,346 13,982 4,878 (13,395) (7,929) 6,518 11,841 (18,162) 15,811 (7,732) 6,159
Unrecognized Net Periodic Benefit Costs | Amounts Reclassified from Accumulated Other Comprehensive Loss
                      
Unrecognized net periodic benefit costs:                      
Amortization of actuarial loss                 (7,935)    
Amortization of prior service credit                 190    
Settlement expense                 (2,111)    
INCOME (LOSS) BEFORE INCOME TAXES                 (9,856)    
Tax benefit                 3,835    
NET INCOME (LOSS) ATTRIBUTABLE TO ARKANSAS BEST CORPORATION                 $ (6,021)