Share-Based Compensation Plan Stock options outstanding activity (Details) (USD $)	3 Months Ended
	Mar. 31, 2014
Shares [Roll Forward]
Outstanding at beginning of year (in shares)	58,513
Granted (in shares)	0
Exercised (in shares)	(4,921)
Forfeited (in shares)	(3,000)
Outstanding at end of period (in shares)	50,592
Options exercisable at year end (in shares)	50,592
Weighted Average Exercise Price [Roll Forward]
Outstanding at beginning of year (in dollars per share)	$ 15.30
Granted (in dollars per share)	$ 0.00
Exercised (in dollars per share)	$ 14.00
Forfeited (in dollars per share)	$ 39.40
Outstanding at end of period (in dollars per share)	$ 14.00
Options exercisable at year end (in dollars per share)	$ 14.00