Stock Incentive Plans - Summary of Option Activity (Details)	12 Months Ended
	Dec. 31, 2015 $ / shares shares
Number of Options
Outstanding at beginning of year | shares	36,000
Expired (in shares) | shares	(24,000)
Outstanding and exercisable at end of year | shares	12,000
Weighted Average Exercise Price
Outstanding at beginning of year | $ / shares	$ 28.58
Expired (in dollars per shares) | $ / shares	(27.99)
Outstanding and exercisable at end of year | $ / shares	$ 29.76