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
Jun. 30, 2014
Dec. 31, 2013
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost $ 511,511 $ 549,113
Gross Unrealized Gain 1,609 782
Gross Unrealized Loss 7,143 18,969
Estimated Fair Value 505,977 530,926
Collateralized mortgage obligations [Member]
    
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost 160,422 130,636
Gross Unrealized Gain 240 274
Gross Unrealized Loss 1,037 3,217
Estimated Fair Value 159,625 127,693
Municipal bonds-tax exempt [Member]
    
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost 4,350 13,857
Gross Unrealized Gain 97 110
Gross Unrealized Loss 0 30
Estimated Fair Value 4,447 13,937
Municipal bonds-taxable [Member]
    
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost 16,718 33,361
Gross Unrealized Gain 158 73
Gross Unrealized Loss 145 1,080
Estimated Fair Value 16,731 32,354
Corporate bonds [Member]
    
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost 17,017 21,013
Gross Unrealized Gain 11 8
Gross Unrealized Loss 103 186
Estimated Fair Value 16,925 20,835
Mortgage-backed securities [Member]
    
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost 215,542 222,768
Gross Unrealized Gain 1,103 317
Gross Unrealized Loss 2,010 6,026
Estimated Fair Value 214,635 217,059
U.S. government agency securities [Member]
    
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost 80,960 90,852
Gross Unrealized Gain 0 0
Gross Unrealized Loss 3,096 7,316
Estimated Fair Value 77,864 83,536
SBA loan pool securities [Member]
    
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost 13,222 13,598
Gross Unrealized Gain 0 0
Gross Unrealized Loss 661 969
Estimated Fair Value 12,561 12,629
Other securities [Member]
    
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost 3,030 3,030
Gross Unrealized Gain 0 0
Gross Unrealized Loss 91 144
Estimated Fair Value 2,939 2,886
Equity security [Member]
    
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost 250  
Gross Unrealized Gain 0  
Gross Unrealized Loss 0  
Estimated Fair Value 250  
U.S. treasury bills [Member]
    
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost   19,998
Gross Unrealized Gain   0
Gross Unrealized Loss   1
Estimated Fair Value   $ 19,997