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Share-Based Payments - Non-vested Roll forward (Details) (USD $)
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]    
Stock options, pre-tax compensation $ 296,000 $ 241,000
Stock option, tax benefit 86,000 18,000
Nonvested awards, total compensation cost not yet recognized, stock options $ 784,000  
Nonvested awards, total compensation cost not yet recognized, period for recognition 2 years 7 months 6 days