Employee Benefits (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2016 USD ($) shares	Jun. 30, 2015 USD ($)	Jun. 30, 2016 USD ($) employee shares	Jun. 30, 2015 USD ($)	Dec. 31, 2015 USD ($)
Employee Stock Ownership Plan
Percentage of common stock outstanding, held in ESOP (as a percent)	9.00%		9.00%
Term of loan payable			25 years
Interest rate (as a percent)			3.50%
Shares held by the ESOP
Allocated (in shares) | shares	31,674		31,674
Distributions (in shares) | shares	(391)		(391)
Committed to be allocated (in shares) | shares	7,919		7,919
Unallocated (in shares) | shares	356,341		356,341
Total (in shares) | shares	395,543		395,543
Fair value of unallocated shares	$ 4,400,000		$ 4,400,000
Total expense	49,000	$ 44,000	99,000	$ 88,000
Deferred Compensation SERP
Deferred Compensation Supplemental Executive Plan
Assets related to the Rabbi Trust	1,000,000		1,000,000		$ 930,000
Liability for benefit obligation reported in accrued expenses and other liabilities	$ 1,000,000		$ 1,000,000		$ 930,000
Shares held in the Rabbi Trust (in shares) | shares	8,900		8,900
Value of shares held in the Rabbi Trust	$ 100,000		$ 100,000
Benefit obligation	100,000		100,000
SERP
Deferred Compensation Supplemental Executive Plan
Expense (income)	192,000	151,000	384,000	302,000
Defined Benefit Pension Plan
Deferred Compensation Supplemental Executive Plan
Expense (income)	$ 5,000	$ 6,000	11,000	$ 11,000
Expected contribution for the current plan year			$ 19,000
Executive officers | SERP
Deferred Compensation Supplemental Executive Plan
Number of employees with whom the entity entered into agreements (in employees) | employee			7
Executive officers | SERP | Minimum
Deferred Compensation Supplemental Executive Plan
Retirement age for SERP			65 years
Executive officers | SERP | Maximum
Deferred Compensation Supplemental Executive Plan
Retirement age for SERP			67 years