Annual report pursuant to Section 13 and 15(d)

Related Party Transactions (Details Textual)

v2.4.0.6
Related Party Transactions (Details Textual) (Alliance Bank [Member], USD $)
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Related Party Transaction [Line Items]    
Interest income on cash deposits placed with affiliated entity $ 687,000 $ 767,000
Affiliate Entity, a Custodian of CDARS [Member]
   
Related Party Transaction [Line Items]    
Cash deposits with related party 102,100,000 149,400,000
Affiliate Entity, a Custodian of ICS [Member]
   
Related Party Transaction [Line Items]    
Cash deposits with related party $ 84,200,000 $ 0