Employee Benefits and Retirement Plans - Summary of Changes in Stock Options (Details) - $ / shares	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Compensation and Retirement Disclosure [Abstract]
No. of Shares, Outstanding, Beginning balance	2,500	10,900	10,900
No. of Shares, Granted	0	0	0
No. of Shares, Expired	(1,500)	(8,400)	0
No. of Shares, Exercised	0	0	0
No. of Shares, Outstanding, Ending balance	1,000	2,500	10,900
Average Price, Outstanding, Beginning balance	$ 21.21	$ 20.19	$ 20.19
Average Price, Granted	0	0	0
Average Price, Expired	22.05	19.89	0
Average Price, Exercised	0	0	0
Average Price, Outstanding, Ending balance	$ 19.95	$ 21.21	$ 20.19