XML 45 R33.htm IDEA: XBRL DOCUMENT v3.4.0.3
Securities - Summary of Amortized Cost and Estimated Fair Values of Securities Held for Investment (Detail) - USD ($)
$ in Thousands
Mar. 31, 2016
Dec. 31, 2015
Schedule of Held-to-maturity Securities [Line Items]    
Amortized Cost $ 8,379 $ 8,789
Gross Unrealized Gains 55 61
Estimated Fair Value 8,434 8,850
Mortgage Backed Securities [Member]    
Schedule of Held-to-maturity Securities [Line Items]    
Amortized Cost 323 347
Gross Unrealized Gains 25 25
Estimated Fair Value 348 372
States and Political Subdivisions [Member]    
Schedule of Held-to-maturity Securities [Line Items]    
Amortized Cost 7,556 7,942
Gross Unrealized Gains 30 36
Estimated Fair Value 7,586 7,978
Other Securities [Member]    
Schedule of Held-to-maturity Securities [Line Items]    
Amortized Cost 500 500
Estimated Fair Value $ 500 $ 500