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INCOME TAXES (Details) (USD $)
 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
Income Tax Disclosure [Abstract]                      
Tax benefit of options exercised and dividends on share-based payment awards                 $ 200,000    
Current provision (benefit):                      
Federal                 12,739,000 0 (872,000)
State                 865,000 694,000 487,000
Foreign                 413,000 405,000 489,000
Current provision (benefit)                 14,017,000 1,099,000 104,000
Deferred provision (benefit):                      
Federal                 (10,335,000) (8,656,000) 2,664,000
State                 160,000 (1,699,000) 415,000
Foreign                 (192,000) (4,000) (23,000)
Deferred tax provision (benefit)                 (10,367,000) (10,359,000) 3,056,000
Total provision (benefit) for income taxes 3,549,000 7,022,000 2,987,000 (9,908,000) (4,387,000) 5,258,000 (5,757,000) (4,374,000) 3,650,000 (9,260,000) 3,160,000
Significant components of the deferred tax provision or benefit                      
Amortization, depreciation, and basis differences for property, plant and equipment and other long-lived assets                 (13,137,000) 137,000 15,059,000
Amortization of intangibles                 (3,048,000) (1,604,000) 0
Changes in reserves for workers' compensation and cargo claims                 (1,751,000) (3,319,000) (970,000)
Revenue recognition                 (1,704,000) (253,000) 654,000
Allowance for doubtful accounts                 516,000 229,000 (705,000)
Foreign tax credit carryforward                 71,000 (133,000) (240,000)
Nonunion pension and other retirement plans                 3,493,000 702,000 (4,885,000)
Deferred compensation plans                 530,000 669,000 853,000
Federal net operating loss carryforwards                 4,207,000 (2,538,000) (680,000)
State net operating loss carryforwards                 254,000 (725,000) 705,000
State depreciation adjustments                 569,000 20,000 (1,179,000)
Share-based compensation                 (1,437,000) (702,000) (941,000)
Valuation allowance decrease                 (1,436,000) (3,180,000) (782,000)
Leases                 612,000 806,000 (316,000)
Other accrued expenses                 3,284,000 (1,586,000) (863,000)
Other                 (1,390,000) 1,118,000 (2,654,000)
Deferred tax provision (benefit)                 $ (10,367,000) $ (10,359,000) $ 3,056,000