Stock-based Compensation, Employee Stock Ownership Plan (Details) - Employee Stock Ownership Plan [Member] - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Aug. 31, 2012	Jan. 31, 2008
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]
Repayment period			10 years
Committed to release (in shares)	21,443		21,443
Unallocated shares (in shares)	88,243		88,243
Number of common shares hold by the trust (in shares)	188,981		188,981
Fair value of shares held by ESOP trust	$ 4,500,000		$ 4,500,000
ESOP compensation expense	155,000	$ 110,000	426,000	$ 313,000
ESOP Borrowing in 2008 [Member]
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]
Amount borrowed by ESOP to purchase common stock						$ 1,200,000
ESOP loan interest rate loan to purchase company stock						4.00%
ESOP remaining loan balance from shares purchased	270,000		270,000
ESOP Borrowing in 2012 [Member]
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]
Amount borrowed by ESOP to purchase common stock					$ 1,100,000
ESOP loan interest rate loan to purchase company stock					2.25%
ESOP remaining loan balance from shares purchased	$ 701,000		$ 701,000