Earnings Per Share (Details) (USD $)	3 Months Ended																								12 Months Ended
	Dec. 31, 2014		Sep. 30, 2014		Jun. 30, 2014		Mar. 31, 2014		Dec. 31, 2013		Sep. 30, 2013		Jun. 30, 2013		Mar. 31, 2013		Dec. 31, 2012		Sep. 30, 2012		Jun. 30, 2012		Mar. 31, 2012		Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Earnings Per Share [Abstract]
Weighted average shares outstanding																									1,651,045	1,652,700	1,663,147
Effect of dilutive stock options outstanding																									0	0	58
Diluted weighted average shares outstanding																									1,651,045	1,652,700	1,663,205
Basic earnings per share	$ 1.10	[1]	$ 1.08	[1]	$ 0.85	[1]	$ 0.87	[1]	$ 0.95	[1]	$ 0.01	[1]	$ 0.95	[1]	$ 0.97	[1]	$ 1.01	[1]	$ 0.74	[1]	$ 1.15	[1]	$ 0.7	[1]	$ 3.90	$ 2.87	$ 3.61
Diluted earnings per share	$ 1.10	[1]	$ 1.08	[1]	$ 0.85	[1]	$ 0.87	[1]	$ 0.95	[1]	$ 0.01	[1]	$ 0.95	[1]	$ 0.97	[1]	$ 1.01	[1]	$ 0.74	[1]	$ 1.15	[1]	$ 0.7	[1]	$ 3.90	$ 2.87	$ 3.61

[1] Basic and diluted earnings per share may not foot to the total for the year ended December 31 due to rounding.