Borrowed Funds - Advances from FHLB with Rates (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Amount
2018	$ 681,536
2019	3,000
2020	25,465
Advances from FHLB, Amount	$ 710,001	$ 854,236
Weighted Average Rate
2018	1.51%
2019	1.51%
2020	1.62%
Advances from FHLB	1.51%