XML 14 R55.htm IDEA: XBRL DOCUMENT v2.4.0.6
Retirement Plans (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 3 Months Ended
Mar. 31, 2013
Dec. 31, 2012
Mar. 31, 2013
Qualified Noncontributory Defined Benefit Retirement Plan [Member]
Mar. 31, 2012
Qualified Noncontributory Defined Benefit Retirement Plan [Member]
Mar. 31, 2013
401(k) Plan [Member]
Mar. 31, 2012
401(k) Plan [Member]
Mar. 31, 2013
Nonqualified Defined Benefit Retirement Plan [Member]
Mar. 31, 2012
Nonqualified Defined Benefit Retirement Plan [Member]
Retirement Plans [Abstract]                
Employer's matching contribution to 401(k) of employees hired on or after January 1, 2009 (in hundredths) 50.00%              
Maximum annual contribution per employee, percent (in hundredths) 3.00%              
Automatic Annual Contribution Employees Hired After January 1, 2009 Benefit Reduction Under Certain Amendments Minimum (in hundredths) 5.00%              
Automatic Annual Contribution Employees Hired After January 1, 2009 Due Benefit Reduction Under Certain Amendments Maximum (in hundredths) 7.00%              
Funding and administrative costs of noncontributory defined benefit retirement plan and 401(k) plan [Abstract]                
Plan expense     $ 31 $ 142        
401(k) plan expense         79 36    
Components of net periodic pension cost [Abstract]                
Service cost             18 22
Interest cost             11 11
Amortization of unrecognized net (gain)/loss             6 5
Amortization of unrecognized prior service cost             7 7
Net periodic pension cost             42 45
Recognized in accumulated other comprehensive income [Abstract]                
Net actuarial loss 121 125            
Past service cost 24 29            
Total $ 145 $ 154