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Employee Benefit Plans, Schedule of Net Periodic Benefit Cost Not Yet Recognized (Details) (USD $)
Sep. 30, 2012
Jun. 30, 2012
Dec. 31, 2011
Sep. 30, 2011
Jun. 30, 2011
Dec. 31, 2010
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]            
Unamortized net actuarial loss $ (100,000)   $ (100,000) $ (49,000)    
Unrecognized transition obligation (13,000)   (34,000) (42,000)    
Total (113,000)   (134,000) (91,000)    
Deferred tax benefit at 35% 41,000   47,000 32,000    
Net unrecognized postretirement benefits included in accumulated other comprehensive income (loss) $ (72,000) $ (77,000) $ (87,000) $ (59,000) $ (63,000) $ (73,000)