Common Stock and Earnings Per Share (Details) - shares	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Common Stock and Earnings Per Share [Abstract]
Weighted average number of shares outstanding (in shares)	12,831,687	12,879,912	12,928,040
Common Stock [Abstract]
Number of shares authorized to be repurchased under the stock repurchase program (in shares)	1,200,000
Number of shares repurchased and retired under the stock repurchase program (in shares)	121,012	282,570	94,414
Number of remaining shares authorized to be repurchased under the stock repurchase program (in shares)	702,004
Employee Stock Purchase Plan [Member]
Common Stock [Abstract]
Minimum service period required to purchase shares	90 days
Maximum gross compensation allocated to purchase shares	10.00%
Percentage of purchase price of fair market value	95.00%
Shares issued during period (in shares)	7,417	7,431	6,711
Number of authorized shares remains unissued (in shares)	80,711
Direct Stock Purchase and Sale Portion of Plan [Member]
Common Stock [Abstract]
Percentage of purchase price of fair market value	100.00%
Optional Dividend Reinvestment Portion of Plan [Member]
Common Stock [Abstract]
Percentage of purchase price of fair market value	95.00%
2008 Dividend Reinvestment and Direct Stock Purchase and Sale Plan [Member]
Common Stock [Abstract]
Shares issued during period (in shares)	0	0	112,163
2013 Dividend Reinvestment and Direct Stock Purchase Plan [Member]
Common Stock [Abstract]
Shares authorized under registration statement (in shares)	500,000
Shares issued during period (in shares)	95,451	126,379	36,188
Number of authorized shares remains unissued (in shares)	241,982