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CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2013
Sep. 30, 2012
CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) [Abstract]        
Net income $ 9,494 $ 3,314 $ 22,584 $ 8,132
Defined benefit pension plans:        
Amortization of prior service cost 33 53 97 157
Amortization of net loss 255 425 787 1,405
Other 0 17 0 117
Total other comprehensive income 288 495 884 1,679
Comprehensive income $ 9,782 $ 3,809 $ 23,468 $ 9,811