Quarterly report pursuant to Section 13 or 15(d)

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

v2.4.0.8
Investment Securities - Summary of Investment Securities Available-for-Sale (Detail) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2013
Dec. 31, 2012
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost $ 392,773 $ 443,712
Gross Unrealized Gain 2,227 8,287
Gross Unrealized Loss 11,943 939
Estimated Fair Value 383,057 451,060
Mortgage-backed securities [Member]
    
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost 129,463 157,185
Gross Unrealized Gain 793 3,327
Gross Unrealized Loss 3,171 186
Estimated Fair Value 127,085 160,326
U.S. government agency securities [Member]
    
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost 98,844 92,990
Gross Unrealized Gain 4 222
Gross Unrealized Loss 5,970 94
Estimated Fair Value 92,878 93,118
Collateralized mortgage obligations [Member]
    
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost 85,191 98,821
Gross Unrealized Gain 773 1,775
Gross Unrealized Loss 854 109
Estimated Fair Value 85,110 100,487
Municipal bonds-tax exempt [Member]
    
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost 6,438 12,209
Gross Unrealized Gain 61 603
Gross Unrealized Loss 13  
Estimated Fair Value 6,486 12,812
Municipal bonds-taxable [Member]
    
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost 35,290 44,248
Gross Unrealized Gain 219 2,029
Gross Unrealized Loss 721 135
Estimated Fair Value 34,788 46,142
Corporate bonds [Member]
    
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost 20,478 20,470
Gross Unrealized Gain 210 176
Gross Unrealized Loss 205 246
Estimated Fair Value 20,483 20,400
SBA loan pool securities [Member]
    
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost 13,826 14,104
Gross Unrealized Gain   4
Gross Unrealized Loss 905 82
Estimated Fair Value 12,921 14,026
Other securities [Member]
    
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost 3,025 3,331
Gross Unrealized Gain   73
Gross Unrealized Loss 104 47
Estimated Fair Value 2,921 3,357
Equity securities [Member]
    
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost 218 354
Gross Unrealized Gain 167 78
Gross Unrealized Loss   40
Estimated Fair Value $ 385 $ 392