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CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Jun. 30, 2013
Jun. 30, 2012
CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) [Abstract]        
Net income $ 4,830 $ 2,361 $ 13,090 $ 4,818
Defined benefit pension plans:        
Amortization of prior service cost 32 52 64 104
Amortization of net loss 266 490 532 980
Other 0 50 0 100
Total other comprehensive income 298 592 596 1,184
Comprehensive income $ 5,128 $ 2,953 $ 13,686 $ 6,002