Investment Securities - Summary of Unrealized Losses of Available-for-Sale Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale, Securities with losses under 12 months, Fair Value	$ 52,739	$ 29,437
Available-for-sale, Securities with losses under 12 months, Gross Unrealized Loss	221	158
Available-for-sale, Securities with losses over 12 months, Fair Value	38,599	68,536
Available-for-sale, Securities with losses over 12 months, Gross Unrealized Loss	854	1,917
Available-for-sale, Total, Fair Value	91,338	97,973
Available-for-sale, Total, Gross Unrealized Loss	1,075	2,075
Obligations of state and political subdivisions
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale, Securities with losses under 12 months, Fair Value	3,190	2,029
Available-for-sale, Securities with losses under 12 months, Gross Unrealized Loss	48	29
Available-for-sale, Securities with losses over 12 months, Fair Value	0	0
Available-for-sale, Securities with losses over 12 months, Gross Unrealized Loss	0	0
Available-for-sale, Total, Fair Value	3,190	2,029
Available-for-sale, Total, Gross Unrealized Loss	48	29
GSE mortgage-backed securities
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale, Securities with losses under 12 months, Fair Value	15,860	6,668
Available-for-sale, Securities with losses under 12 months, Gross Unrealized Loss	45	25
Available-for-sale, Securities with losses over 12 months, Fair Value	3,754	21,538
Available-for-sale, Securities with losses over 12 months, Gross Unrealized Loss	10	263
Available-for-sale, Total, Fair Value	19,614	28,206
Available-for-sale, Total, Gross Unrealized Loss	55	288
Collateralized mortgage obligations: residential
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale, Securities with losses under 12 months, Fair Value	33,689	9,366
Available-for-sale, Securities with losses under 12 months, Gross Unrealized Loss	128	53
Available-for-sale, Securities with losses over 12 months, Fair Value	31,772	37,997
Available-for-sale, Securities with losses over 12 months, Gross Unrealized Loss	799	1,467
Available-for-sale, Total, Fair Value	65,461	47,363
Available-for-sale, Total, Gross Unrealized Loss	927	1,520
Collateralized mortgage obligations: commercial
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale, Securities with losses under 12 months, Fair Value	0	0
Available-for-sale, Securities with losses under 12 months, Gross Unrealized Loss	0	0
Available-for-sale, Securities with losses over 12 months, Fair Value	3,073	3,747
Available-for-sale, Securities with losses over 12 months, Gross Unrealized Loss	45	107
Available-for-sale, Total, Fair Value	3,073	3,747
Available-for-sale, Total, Gross Unrealized Loss	$ 45	107
U.S. Government sponsored enterprises
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale, Securities with losses under 12 months, Fair Value		4,973
Available-for-sale, Securities with losses under 12 months, Gross Unrealized Loss		32
Available-for-sale, Securities with losses over 12 months, Fair Value		5,254
Available-for-sale, Securities with losses over 12 months, Gross Unrealized Loss		80
Available-for-sale, Total, Fair Value		10,227
Available-for-sale, Total, Gross Unrealized Loss		112
Other asset-backed securities
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale, Securities with losses under 12 months, Fair Value		6,401
Available-for-sale, Securities with losses under 12 months, Gross Unrealized Loss		19
Available-for-sale, Securities with losses over 12 months, Fair Value		0
Available-for-sale, Securities with losses over 12 months, Gross Unrealized Loss		0
Available-for-sale, Total, Fair Value		6,401
Available-for-sale, Total, Gross Unrealized Loss		$ 19