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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, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) [Abstract]        
Net income $ 4,829 $ 4,830 $ 10,958 $ 13,090
Defined benefit pension plans:        
Amortization of prior service cost 32 32 64 64
Amortization of net loss 48 266 98 532
Total other comprehensive income 80 298 162 596
Comprehensive income $ 4,909 $ 5,128 $ 11,120 $ 13,686