Fair Value of Financial Instruments - Assets and Liabilities Measured on Recurring Basis (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Assets
Securities available for sale, at fair value	$ 358,306	$ 344,716	[1]
Quoted Prices in Active Markets for Identical Assets Level 1 [Member]
Assets
Securities available for sale, at fair value	0	4,167
Significant Other Observable Inputs Level 2 [Member]
Assets
Securities available for sale, at fair value	357,009	339,236
Significant Unobservable Inputs Level 3 [Member]
Assets
Securities available for sale, at fair value	1,297	1,313
Fair Value, Measurements, Recurring [Member]
Assets
Securities available for sale, at fair value	358,306	344,716
Fair Value, Measurements, Recurring [Member] | Quoted Prices in Active Markets for Identical Assets Level 1 [Member]
Assets
Securities available for sale, at fair value	0	4,167
Fair Value, Measurements, Recurring [Member] | Significant Other Observable Inputs Level 2 [Member]
Assets
Securities available for sale, at fair value	357,009	339,236
Fair Value, Measurements, Recurring [Member] | Significant Unobservable Inputs Level 3 [Member]
Assets
Securities available for sale, at fair value	1,297	1,313
Federal agencies and GSEs [Member]
Assets
Securities available for sale, at fair value	104,246	82,106
Federal agencies and GSEs [Member] | Fair Value, Measurements, Recurring [Member]
Assets
Securities available for sale, at fair value	104,246	82,106
Federal agencies and GSEs [Member] | Fair Value, Measurements, Recurring [Member] | Quoted Prices in Active Markets for Identical Assets Level 1 [Member]
Assets
Securities available for sale, at fair value	0	2,995
Federal agencies and GSEs [Member] | Fair Value, Measurements, Recurring [Member] | Significant Other Observable Inputs Level 2 [Member]
Assets
Securities available for sale, at fair value	104,246	79,111
Federal agencies and GSEs [Member] | Fair Value, Measurements, Recurring [Member] | Significant Unobservable Inputs Level 3 [Member]
Assets
Securities available for sale, at fair value	0	0
Mortgage-backed and CMOs [Member]
Assets
Securities available for sale, at fair value	55,699	57,425
Mortgage-backed and CMOs [Member] | Fair Value, Measurements, Recurring [Member]
Assets
Securities available for sale, at fair value	55,699	57,425
Mortgage-backed and CMOs [Member] | Fair Value, Measurements, Recurring [Member] | Quoted Prices in Active Markets for Identical Assets Level 1 [Member]
Assets
Securities available for sale, at fair value	0	0
Mortgage-backed and CMOs [Member] | Fair Value, Measurements, Recurring [Member] | Significant Other Observable Inputs Level 2 [Member]
Assets
Securities available for sale, at fair value	55,699	57,425
Mortgage-backed and CMOs [Member] | Fair Value, Measurements, Recurring [Member] | Significant Unobservable Inputs Level 3 [Member]
Assets
Securities available for sale, at fair value	0	0
State and municipal [Member]
Assets
Securities available for sale, at fair value	186,356	195,493
State and municipal [Member] | Fair Value, Measurements, Recurring [Member]
Assets
Securities available for sale, at fair value	186,356	195,493
State and municipal [Member] | Fair Value, Measurements, Recurring [Member] | Quoted Prices in Active Markets for Identical Assets Level 1 [Member]
Assets
Securities available for sale, at fair value	0	1,172
State and municipal [Member] | Fair Value, Measurements, Recurring [Member] | Significant Other Observable Inputs Level 2 [Member]
Assets
Securities available for sale, at fair value	186,356	194,321
State and municipal [Member] | Fair Value, Measurements, Recurring [Member] | Significant Unobservable Inputs Level 3 [Member]
Assets
Securities available for sale, at fair value	0	0
Corporate [Member]
Assets
Securities available for sale, at fair value	10,708	8,379
Corporate [Member] | Fair Value, Measurements, Recurring [Member]
Assets
Securities available for sale, at fair value	10,708	8,379
Corporate [Member] | Fair Value, Measurements, Recurring [Member] | Quoted Prices in Active Markets for Identical Assets Level 1 [Member]
Assets
Securities available for sale, at fair value	0	0
Corporate [Member] | Fair Value, Measurements, Recurring [Member] | Significant Other Observable Inputs Level 2 [Member]
Assets
Securities available for sale, at fair value	10,708	8,379
Corporate [Member] | Fair Value, Measurements, Recurring [Member] | Significant Unobservable Inputs Level 3 [Member]
Assets
Securities available for sale, at fair value	0	0
Equity [Member]
Assets
Securities available for sale, at fair value	1,297	1,313
Equity [Member] | Fair Value, Measurements, Recurring [Member]
Assets
Securities available for sale, at fair value	1,297	1,313
Equity [Member] | Fair Value, Measurements, Recurring [Member] | Quoted Prices in Active Markets for Identical Assets Level 1 [Member]
Assets
Securities available for sale, at fair value	0	0
Equity [Member] | Fair Value, Measurements, Recurring [Member] | Significant Other Observable Inputs Level 2 [Member]
Assets
Securities available for sale, at fair value	0	0
Equity [Member] | Fair Value, Measurements, Recurring [Member] | Significant Unobservable Inputs Level 3 [Member]
Assets
Securities available for sale, at fair value	$ 1,297	$ 1,313

[1] Derived from audited consolidated financial statements.