Common Shares and Preferred Shares (Tables)

12 Months Ended

Dec. 31, 2016

Equity [Abstract]

Schedule of stock by class [Table Text Block]

Common Shares Outstanding--The table below reconciles the activity of the common shares outstanding:

	December 31,
	2016		2015
Shares outstanding, beginning of year	12,743,314		13,164,933
Shares purchased	(746,041	)	(823,827	)
Shares sold	308,892		287,875
Stock subscription offering, employee cash purchases	24,365		43,071
Options exercised	131,040		71,262
	(281,744	)	(421,619	)
Shares outstanding, end of year	12,461,570		12,743,314