Quarterly report pursuant to Section 13 or 15(d)

CONSOLIDATED CONDENSED BALANCE SHEETS (Parenthetical)

v2.4.0.8
CONSOLIDATED CONDENSED BALANCE SHEETS (Parenthetical) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2014
Dec. 31, 2013
Statement of Financial Position [Abstract]    
Allowance for bad debts $ 11,292 $ 12,853
Accumulated depreciation and amortization on property, plant and equipment $ 1,160,435 $ 1,136,024