XML 83 R96.htm IDEA: XBRL DOCUMENT v2.4.0.8
Goodwill and Other Amortizing Intangible Assets - Additional Information (Detail) (USD $)
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Nov. 30, 2012
Goodwill And Other Intangibles [Line Items]        
Goodwill $ 159,956,000 $ 159,956,000    
Impairment charges on goodwill 0 0 0  
Fair value of goodwill above book value       30.00%
Amortization of other intangible assets $ 1,064,000 $ 1,467,000 $ 1,534,000  
Core Deposits Intangibles [Member]
       
Goodwill And Other Intangibles [Line Items]        
Core deposits remaining amortization period 6 years      
Core deposits weighted average amortization period 2 years