Annual report pursuant to Section 13 and 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
Dec. 31, 2013
Dec. 31, 2012
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost $ 549,113 $ 443,712
Gross Unrealized Gain 782 8,287
Gross Unrealized Loss 18,969 939
Estimated Fair Value 530,926 451,060
Collateralized mortgage obligations [Member]
    
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost 130,636 98,821
Gross Unrealized Gain 274 1,775
Gross Unrealized Loss 3,217 109
Estimated Fair Value 127,693 100,487
Municipal bonds-tax exempt [Member]
    
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost 13,857 12,209
Gross Unrealized Gain 110 603
Gross Unrealized Loss 30  
Estimated Fair Value 13,937 12,812
Municipal bonds-taxable [Member]
    
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost 33,361 44,248
Gross Unrealized Gain 73 2,029
Gross Unrealized Loss 1,080 135
Estimated Fair Value 32,354 46,142
Corporate bonds [Member]
    
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost 21,013 20,470
Gross Unrealized Gain 8 176
Gross Unrealized Loss 186 246
Estimated Fair Value 20,835 20,400
Mortgage-backed securities [Member]
    
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost 222,768 157,185
Gross Unrealized Gain 317 3,327
Gross Unrealized Loss 6,026 186
Estimated Fair Value 217,059 160,326
U.S. government agency securities [Member]
    
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost 90,852 92,990
Gross Unrealized Gain    222
Gross Unrealized Loss 7,316 94
Estimated Fair Value 83,536 93,118
U.S. treasury bills [Member]
    
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost 19,998  
Gross Unrealized Gain     
Gross Unrealized Loss 1  
Estimated Fair Value 19,997  
SBA loan pool securities [Member]
    
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost 13,598 14,104
Gross Unrealized Gain    4
Gross Unrealized Loss 969 82
Estimated Fair Value 12,629 14,026
Other securities [Member]
    
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost 3,030 3,331
Gross Unrealized Gain    73
Gross Unrealized Loss 144 47
Estimated Fair Value 2,886 3,357
Equity securities [Member]
    
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost   354
Gross Unrealized Gain   78
Gross Unrealized Loss   40
Estimated Fair Value   $ 392