Quarterly report pursuant to Section 13 or 15(d)

Intangible Assets (Details Textual)

v2.4.0.6
Intangible Assets (Details Textual) (USD $)
1 Months Ended 3 Months Ended 12 Months Ended
Feb. 28, 2010
Mar. 31, 2013
Mar. 31, 2012
Dec. 31, 2012
Intangible Assets (Textual) [Abstract]        
Amortization expense   $ 1,476,000 $ 3,595,000  
Intangible Assets (Additional Textual) [Abstract]        
Impairment charges   0    
Minimum [Member]
       
Intangible Assets (Textual) [Abstract]        
Amortization period   4 years    
Maximum [Member]
       
Intangible Assets (Textual) [Abstract]        
Amortization period   14 years    
Core Deposits [Member]
       
Intangible Assets (Textual) [Abstract]        
Amortization expense   1,000,000 1,300,000 4,900,000
Trademarks [Member]
       
Intangible Assets (Textual) [Abstract]        
Amortization period 3 years      
Amortization expense   $ 33,000 $ 100,000 $ 400,000