Quarterly report pursuant to Section 13 or 15(d)

Goodwill and Intangible Assets (Details Textual)

v2.4.0.6
Goodwill and Intangible Assets (Details Textual) (USD $)
3 Months Ended 6 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2012
Jun. 30, 2011
Goodwill and Intangible Assets (Textual) [Abstract]        
Amortization expense     $ 4,835,000 $ 3,182,000
Minimum [Member]
       
Goodwill and Intangible Assets (Textual) [Abstract]        
Period of amortization     4 years  
Maximum [Member]
       
Goodwill and Intangible Assets (Textual) [Abstract]        
Period of amortization     14 years  
Harrisonburg branch acquisition [Member]
       
Goodwill and Intangible Assets (Textual) [Abstract]        
Core deposit intangible 9,500   9,500  
Goodwill 1,800,000   1,800,000  
Amortizable core deposit intangibles [Member]
       
Goodwill and Intangible Assets (Textual) [Abstract]        
Amortization expense 1,200,000 1,600,000 2,500,000 3,200,000
Amortizable core deposit intangibles [Member] | Harrisonburg branch acquisition [Member]
       
Goodwill and Intangible Assets (Textual) [Abstract]        
Amortization expense       9,500
Trademark intangible [Member]
       
Goodwill and Intangible Assets (Textual) [Abstract]        
Amortization expense $ 100,000 $ 100,000 $ 200,000 $ 200,000