Employee Benefits and Retirement Plans - Summary of Stock Options Outstanding and Exercisable (Details) (USD $)					12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2013 Range 1 [Member]	Dec. 31, 2013 Range 2 [Member]	Dec. 31, 2013 Range 3 [Member]
Outstanding Stock Options, Exercise Price Range, minimum					$ 19	$ 21	$ 19
Outstanding Stock Options, Exercise Price Range, maximum					$ 20	$ 23	$ 23
Outstanding Stock Options	10,900	10,900	10,900	13,880	7,600	3,300	10,900
Outstanding Stock Options, Weighted- Average Remaining Contractual Life					1 year	1 year 6 months
Outstanding Stock Options, Weighted Average Exercise Price	$ 20.19	$ 20.19	$ 20.19	$ 19.08	$ 19.61	$ 21.52	$ 20.19
Exercisable Stock Options	10,900	10,900	10,900		7,600	3,300	10,900
Exercisable Stock Options, Weighted Average Exercise Price	$ 20.19	$ 20.19	$ 20.19		$ 19.61	$ 21.52	$ 20.19