Dividends and Basic Earnings Per Common Share (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Dividends and Basic Earnings Per Common Share [Abstract]
Dividends on common stock (in dollars per share)			$ 6.30	$ 6.20
Dividends payable recorded date			Jun. 09, 2014
Dividends payable, date to be paid			Jul. 01, 2014	Jul. 01, 2013
Percentage increase in cash dividend per share (in hundredths)			1.60%
Earnings per share for the period [Abstract]
Net Income	$ 6,432	$ 6,352	$ 18,818	$ 18,168
Weighted Average Number of Common Shares Outstanding (in shares)	777,882	777,882	777,882	777,882
Basic Earnings Per Common Share (in dollars per share)	$ 8.27	$ 8.17	$ 24.19	$ 23.36