Securities - Unrealized Loss Positions (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, Fair Value	$ 3,495	$ 19,063
Less than 12 months, Unrealized Loss	23	1,186
12 months or more, Fair Value	15,347	3,768
12 months or more, Unrealized Loss	527	142
Fair Value, Total	18,842	22,831
Total Unrealized Loss	550	1,328
US Government Agencies
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, Fair Value	1,903	4,808
Less than 12 months, Unrealized Loss	8	66
12 months or more, Fair Value	4,235	1,462
12 months or more, Unrealized Loss	53	20
Fair Value, Total	6,138	6,270
Total Unrealized Loss	61	86
State and Municipal Obligations
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, Fair Value	1,592	14,255
Less than 12 months, Unrealized Loss	15	1,120
12 months or more, Fair Value	11,112	2,306
12 months or more, Unrealized Loss	474	122
Fair Value, Total	12,704	16,561
Total Unrealized Loss	$ 489	$ 1,242