Investment Securities Available-for-Sale - Schedule of Securities with Gross Unrealized Losses Aggregated by Investment Category and Length of Time (Detail) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities in a continuous loss position, Less Than 12 Months, Fair Value	$ 7,650	$ 14,339
Available-for-sale securities in a continuous loss position, Less Than 12 Months, Unrealized Losses	102	102
Available-for-sale securities in a continuous loss position, More Than 12 Months, Fair Value	287	652
Available-for-sale securities in a continuous loss position, More Than 12 Months, Unrealized Losses	5	14
Available-for-sale securities in a continuous loss position, Fair Value	7,937	14,991
Available-for-sale securities in a continuous loss position, Unrealized Losses	107	116
State and Municipal [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities in a continuous loss position, Less Than 12 Months, Fair Value	4,080
Available-for-sale securities in a continuous loss position, Less Than 12 Months, Unrealized Losses	9
Available-for-sale securities in a continuous loss position, More Than 12 Months, Fair Value	287	652
Available-for-sale securities in a continuous loss position, More Than 12 Months, Unrealized Losses	5	14
Available-for-sale securities in a continuous loss position, Fair Value	4,367	652
Available-for-sale securities in a continuous loss position, Unrealized Losses	14	14
Mortgage-Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities in a continuous loss position, Less Than 12 Months, Fair Value		9,513
Available-for-sale securities in a continuous loss position, Less Than 12 Months, Unrealized Losses		35
Available-for-sale securities in a continuous loss position, Fair Value		9,513
Available-for-sale securities in a continuous loss position, Unrealized Losses		35
Collateralized Mortgage Obligations (CMOs) [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities in a continuous loss position, Less Than 12 Months, Fair Value		725
Available-for-sale securities in a continuous loss position, Less Than 12 Months, Unrealized Losses		3
Available-for-sale securities in a continuous loss position, Fair Value		725
Available-for-sale securities in a continuous loss position, Unrealized Losses		3
Corporate Debt Obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities in a continuous loss position, Less Than 12 Months, Fair Value	3,452	3,937
Available-for-sale securities in a continuous loss position, Less Than 12 Months, Unrealized Losses	48	62
Available-for-sale securities in a continuous loss position, Fair Value	3,452	3,937
Available-for-sale securities in a continuous loss position, Unrealized Losses	48	62
Equity Securities, Financial Services [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities in a continuous loss position, Less Than 12 Months, Fair Value	118	164
Available-for-sale securities in a continuous loss position, Less Than 12 Months, Unrealized Losses	45	2
Available-for-sale securities in a continuous loss position, Fair Value	118	164
Available-for-sale securities in a continuous loss position, Unrealized Losses	$ 45	$ 2