Annual report pursuant to Section 13 and 15(d)

Securities - Schedule of Amortized Cost and Estimated Fair Value of Investment Securities by Contractual Maturity (Detail)

v3.10.0.1
Securities - Schedule of Amortized Cost and Estimated Fair Value of Investment Securities by Contractual Maturity (Detail) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Amortized Cost    
Within one year $ 17,973  
Over one year through five years 139,853  
Over five years through ten years 216,139  
Over ten years 209,479  
Amortized Cost 583,444 $ 581,992
Estimated Fair Value    
Within one year 17,952  
Over one year through five years 138,351  
Over five years through ten years 213,385  
Over ten years 205,220  
Total $ 574,908 $ 578,804