Other Long-term Debt (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Amount
Long-term debt	$ 9,314	$ 89,459
Borrowings from FHLB [Member]
Amount
2015		80,142
2016	563	563
2017	585	585
2018	607	607
2019	631	631
2020	659
Thereafter		$ 6,931
Thereafter	$ 6,269
2015, Weighted Average Contractual Rate		0.82%
2016, Weighted Average Contractual Rate	3.82%	3.82%
2017, Weighted Average Contractual Rate	3.83%	3.83%
2018, Weighted Average Contractual Rate	3.83%	3.83%
2019, Weighted Average Contractual Rate	3.83%	3.84%
2020, Weighted Average Contractual Rate	3.84%
Thereafter, Weighted Average Contractual Rate		3.81%
Thereafter, Weighted Average Contractual Rate	3.81%
2015, Weighted Average Effective Rate		0.82%
2016, Weighted Average Effective Rate	3.82%	3.82%
2017, Weighted Average Effective Rate	3.83%	3.83%
2016, Weighted Average Effective Rate	3.83%	3.83%
2017, Weighted Average Effective Rate	3.83%	3.84%
2018, Weighted Average Effective Rate	3.84%
Thereafter, Weighted Average Effective Rate		3.81%
Thereafter, Weighted Average Effective Rate	3.81%