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Consolidated Statement of COMPREHENSIVE INCOME (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Consolidated Statement of COMPREHENSIVE INCOME (LOSS) [Abstract]      
Net income $ 14,911 $ 15,463 $ 8,444
Defined benefit pension plans:      
Net gain (loss) during year 339 (10,315) (3,919)
Amortization of prior service cost 210 210 209
Amortization of net loss 1,873 947 766
Tax (921) 3,389 0
Defined benefit pension plan, net 1,501 (5,769) (2,944)
Other comprehensive income 117 201 201
Total other comprehensive income (loss) 1,618 (5,568) (2,743)
Total comprehensive income $ 16,529 $ 9,895 $ 5,701