Premises and Equipment - Schedule of Future Minimum Rentals (Detail) $ in Thousands	Dec. 31, 2016 USD ($)
Premises [Member]
Operating Leased Assets [Line Items]
2016	$ 3,844
2017	3,559
2018	3,137
2019	2,556
2020	2,265
Thereafter	9,693
Total	25,054
Equipment [Member]
Operating Leased Assets [Line Items]
2016	10
2017	0
2018	0
2019	0
2020	0
Thereafter	0
Total	$ 10