Stock Based Compensation (Tables)

3 Months Ended

Mar. 31, 2017

Share Based Compensation [Abstract]

Schedule of Compensation Cost for Share-based Payment Arrangements, Allocation of Share-based Compensation Costs by Plan [Table Text Block]

	Three Months Ended
	March 31,
	2017		2016
Stock options	$	227	$	201
Nonvested stock awards and restricted stock units		802		848
Employee stock purchase plan		23		23
Non-elective and elective 401(k) matching contribution in stock		64		689
Director stock ownership plan		37		37
Total stock-based compensation expense	$	1,153	$	1,798

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

Number of options granted	42,477
Dividend yield	1.49	%
Expected volatility	25.52	%
Risk-free interest rate	1.67	%
Expected term (years)	4.0