Share-Based Compensation Plan Stock options outstanding activity (Details) - $ / shares	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Shares [Roll Forward]
Outstanding at beginning of year (in shares)	30,012	58,513	82,171
Granted (in shares)	0	0	0
Exercised (in shares)	0	(25,501)	(2,743)
Forfeited (in shares)	0	(3,000)	(20,915)
Outstanding at end of period (in shares)	30,012	30,012	58,513
Options exercisable at year end (in shares)	30,012	30,012	58,513
Weighted Average Exercise Price [Roll Forward]
Outstanding at beginning of year (in dollars per share)	$ 14.00	$ 15.30	$ 17.32
Granted (in dollars per share)	0.00	0.00	0.00
Exercised (in dollars per share)	0.00	14.00	14.00
Forfeited (in dollars per share)	0.00	39.40	23.42
Outstanding at end of period (in dollars per share)	14.00	14.00	15.30
Options exercisable at year end (in dollars per share)	$ 14.00	$ 14.00	$ 15.30