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Loans - Schedule of Activity in Allowance for Loan Losses (Detail) (Allowance for Loan Losses [Member], USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Financing Receivable, Allowance for Credit Losses [Line Items]      
Beginning balance $ 5,319 $ 5,104 $ 3,920
Charge-offs (2,155) (2,325) (334)
Recoveries 101 129 58
Provision 3,653 2,411 1,460
Ending balance 6,918 5,319 5,104
Originated Loans [Member]
      
Financing Receivable, Allowance for Credit Losses [Line Items]      
Beginning balance 5,114 5,054 3,920
Charge-offs (2,119) (2,325) (334)
Recoveries 101 129 58
Provision 3,574 2,256 1,410
Ending balance 6,670 5,114 5,054
Non-Covered Acquired Loans [Member]
      
Financing Receivable, Allowance for Credit Losses [Line Items]      
Beginning balance 205      
Charge-offs (36)      
Recoveries         
Provision 79 205   
Ending balance 248 205   
Covered Loans [Member]
      
Financing Receivable, Allowance for Credit Losses [Line Items]      
Beginning balance    50   
Charge-offs         
Recoveries         
Provision    (50) 50
Ending balance       50
One- to Four-Family First Mortgage [Member]
      
Financing Receivable, Allowance for Credit Losses [Line Items]      
Beginning balance 982 778 641
Charge-offs (112)      
Recoveries       16
Provision 218 204 121
Ending balance 1,088 982 778
One- to Four-Family First Mortgage [Member] | Originated Loans [Member]
      
Financing Receivable, Allowance for Credit Losses [Line Items]      
Beginning balance 798 778 641
Charge-offs (76)      
Recoveries       16
Provision 182 20 121
Ending balance 904 798 778
One- to Four-Family First Mortgage [Member] | Non-Covered Acquired Loans [Member]
      
Financing Receivable, Allowance for Credit Losses [Line Items]      
Beginning balance 184      
Charge-offs (36)      
Recoveries         
Provision 36 184   
Ending balance 184 184   
One- to Four-Family First Mortgage [Member] | Covered Loans [Member]
      
Financing Receivable, Allowance for Credit Losses [Line Items]      
Beginning balance         
Charge-offs         
Recoveries         
Provision         
Ending balance         
Home Equity Loans and Lines [Member]
      
Financing Receivable, Allowance for Credit Losses [Line Items]      
Beginning balance 343 336 296
Charge-offs    (32)   
Recoveries 10 15   
Provision 71 24 40
Ending balance 424 343 336
Home Equity Loans and Lines [Member] | Originated Loans [Member]
      
Financing Receivable, Allowance for Credit Losses [Line Items]      
Beginning balance 322 336 296
Charge-offs    (32)   
Recoveries 10 15   
Provision 34 3 40
Ending balance 366 322 336
Home Equity Loans and Lines [Member] | Non-Covered Acquired Loans [Member]
      
Financing Receivable, Allowance for Credit Losses [Line Items]      
Beginning balance 21      
Charge-offs         
Recoveries         
Provision 37 21   
Ending balance 58 21   
Home Equity Loans and Lines [Member] | Covered Loans [Member]
      
Financing Receivable, Allowance for Credit Losses [Line Items]      
Beginning balance         
Charge-offs         
Recoveries         
Provision         
Ending balance         
Commercial Real Estate [Member]
      
Financing Receivable, Allowance for Credit Losses [Line Items]      
Beginning balance 2,040 1,755 1,258
Charge-offs    (1,980)   
Recoveries    94 6
Provision 488 2,171 491
Ending balance 2,528 2,040 1,755
Commercial Real Estate [Member] | Originated Loans [Member]
      
Financing Receivable, Allowance for Credit Losses [Line Items]      
Beginning balance 2,040 1,755 1,258
Charge-offs    (1,980)   
Recoveries    94 6
Provision 487 2,171 491
Ending balance 2,528 2,040 1,755
Commercial Real Estate [Member] | Non-Covered Acquired Loans [Member]
      
Financing Receivable, Allowance for Credit Losses [Line Items]      
Beginning balance         
Charge-offs         
Recoveries         
Provision         
Ending balance         
Commercial Real Estate [Member] | Covered Loans [Member]
      
Financing Receivable, Allowance for Credit Losses [Line Items]      
Beginning balance         
Charge-offs         
Recoveries         
Provision         
Ending balance         
Construction and Land [Member]
      
Financing Receivable, Allowance for Credit Losses [Line Items]      
Beginning balance 785 904 666
Charge-offs (44) (215)   
Recoveries 10      
Provision 226 96 238
Ending balance 977 785 904
Construction and Land [Member] | Originated Loans [Member]
      
Financing Receivable, Allowance for Credit Losses [Line Items]      
Beginning balance 785 904 666
Charge-offs (44) (215)   
Recoveries 10      
Provision 226 96 238
Ending balance 977 785 904
Construction and Land [Member] | Non-Covered Acquired Loans [Member]
      
Financing Receivable, Allowance for Credit Losses [Line Items]      
Beginning balance         
Charge-offs         
Recoveries         
Provision         
Ending balance         
Construction and Land [Member] | Covered Loans [Member]
      
Financing Receivable, Allowance for Credit Losses [Line Items]      
Beginning balance         
Charge-offs         
Recoveries         
Provision         
Ending balance         
Multi-Family Residential [Member]
      
Financing Receivable, Allowance for Credit Losses [Line Items]      
Beginning balance 86 64 46
Charge-offs         
Recoveries         
Provision 4 22 18
Ending balance 90 86 64
Multi-Family Residential [Member] | Originated Loans [Member]
      
Financing Receivable, Allowance for Credit Losses [Line Items]      
Beginning balance 86 64 46
Charge-offs         
Recoveries         
Provision 4 22 18
Ending balance 90 86 64
Multi-Family Residential [Member] | Non-Covered Acquired Loans [Member]
      
Financing Receivable, Allowance for Credit Losses [Line Items]      
Beginning balance         
Charge-offs         
Recoveries         
Provision         
Ending balance         
Multi-Family Residential [Member] | Covered Loans [Member]
      
Financing Receivable, Allowance for Credit Losses [Line Items]      
Beginning balance         
Charge-offs         
Recoveries         
Provision         
Ending balance         
Commercial and Industrial [Member]
      
Financing Receivable, Allowance for Credit Losses [Line Items]      
Beginning balance 683 922 746
Charge-offs (1,990) (60) (281)
Recoveries 57 6 25
Provision 2,588 (185) 432
Ending balance 1,338 683 922
Commercial and Industrial [Member] | Originated Loans [Member]
      
Financing Receivable, Allowance for Credit Losses [Line Items]      
Beginning balance 683 872 746
Charge-offs (1,990) (60) (281)
Recoveries 57 6 25
Provision 2,582 (135) 382
Ending balance 1,332 683 872
Commercial and Industrial [Member] | Non-Covered Acquired Loans [Member]
      
Financing Receivable, Allowance for Credit Losses [Line Items]      
Beginning balance         
Charge-offs         
Recoveries         
Provision 6      
Ending balance 6      
Commercial and Industrial [Member] | Covered Loans [Member]
      
Financing Receivable, Allowance for Credit Losses [Line Items]      
Beginning balance    50   
Charge-offs         
Recoveries         
Provision    (50) 50
Ending balance       50
Consumer [Member]
      
Financing Receivable, Allowance for Credit Losses [Line Items]      
Beginning balance 400 345 267
Charge-offs (9) (38) (53)
Recoveries 24 14 11
Provision 58 79 120
Ending balance 473 400 345
Consumer [Member] | Originated Loans [Member]
      
Financing Receivable, Allowance for Credit Losses [Line Items]      
Beginning balance 400 345 267
Charge-offs (9) (38) (53)
Recoveries 24 14 11
Provision 58 79 120
Ending balance 473 400 345
Consumer [Member] | Non-Covered Acquired Loans [Member]
      
Financing Receivable, Allowance for Credit Losses [Line Items]      
Beginning balance         
Charge-offs         
Recoveries         
Provision         
Ending balance         
Consumer [Member] | Covered Loans [Member]
      
Financing Receivable, Allowance for Credit Losses [Line Items]      
Beginning balance         
Charge-offs         
Recoveries         
Provision         
Ending balance