Annual report pursuant to Section 13 and 15(d)

Investment Securities - Summary of Investment Securities Available for Sale (Detail)

v2.4.0.6
Investment Securities - Summary of Investment Securities Available for Sale (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost $ 443,712 $ 377,747
Gross Unrealized Gain 8,287 5,097
Gross Unrealized Loss 939 982
Estimated Fair Value 451,060 381,862
Mortgage-Backed Securities [Member]
    
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost 157,185 110,433
Gross Unrealized Gain 3,327 2,573
Gross Unrealized Loss 186 1
Estimated Fair Value 160,326 113,005
Collateralized Mortgage Obligations [Member]
    
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost 98,821 161,214
Gross Unrealized Gain 1,775 1,883
Gross Unrealized Loss 109 260
Estimated Fair Value 100,487 162,837
U.S. Government Agency Securities [Member]
    
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost 92,990 72,385
Gross Unrealized Gain 222 168
Gross Unrealized Loss 94 5
Estimated Fair Value 93,118 72,548
Municipal Bonds-Tax Exempt [Member]
    
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost 12,209 3,389
Gross Unrealized Gain 603 93
Gross Unrealized Loss      
Estimated Fair Value 12,812 3,482
Municipal Bonds-Taxable [Member]
    
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost 44,248 5,901
Gross Unrealized Gain 2,029 237
Gross Unrealized Loss 135   
Estimated Fair Value 46,142 6,138
Corporate Bonds [Member]
    
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost 20,470 20,460
Gross Unrealized Gain 176   
Gross Unrealized Loss 246 624
Estimated Fair Value 20,400 19,836
SBA Loans Pools Securities [Member]
    
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost 14,104  
Gross Unrealized Gain 4  
Gross Unrealized Loss 82  
Estimated Fair Value 14,026  
Other Securities [Member]
    
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost 3,331 3,318
Gross Unrealized Gain 73 58
Gross Unrealized Loss 47 41
Estimated Fair Value 3,357 3,335
Equity Securities [Member]
    
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost 354 647
Gross Unrealized Gain 78 85
Gross Unrealized Loss 40 51
Estimated Fair Value $ 392 $ 681