Other Long-term Debt - Summary of Other Long-Term Debt (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Debt Instrument [Line Items]
2014, Amount	$ 57,892
2015, Amount	79,971
2016, Amount	389
2017, Amount	407
2018, Amount	426
Thereafter, Amount	5,300
Long-term debt	144,385	174,471
Borrowings from FHLB [Member]
Debt Instrument [Line Items]
2013, Weighted Average Contractual Rate		2.32%
2013, Weighted Average Effective Rate		2.32%
2013, Amount		30,085
2014, Weighted Average Contractual Rate	1.13%	1.13%
2015, Weighted Average Contractual Rate	0.82%	0.82%
2016, Weighted Average Contractual Rate	4.64%	4.64%
2017, Weighted Average Contractual Rate	4.64%	4.64%
2018, Weighted Average Contractual Rate	4.64%
Thereafter, Weighted Average Contractual Rate		4.66%
Thereafter, Weighted Average Contractual Rate	4.66%
2014, Weighted Average Effective Rate	1.13%	1.13%
2015, Weighted Average Effective Rate	0.82%	0.82%
2016, Weighted Average Effective Rate	4.64%	4.64%
2017, Weighted Average Effective Rate	4.64%	4.64%
2018, Weighted Average Effective Rate	4.64%
Thereafter, Weighted Average Effective Rate		4.66%
Thereafter, Weighted Average Effective Rate	4.66%
2014, Amount	57,892	57,890
2015, Amount	79,971	79,970
2016, Amount	389	387
2017, Amount	407	405
2018, Amount	426
Thereafter, Amount		5,734
Thereafter, Amount	$ 5,300