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Summary of Significant Accounting Policies Earnings Per Share (Tables)
 3 Months Ended
Mar. 31, 2017
Earnings Per Share [Abstract]  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
The following table sets forth the computation of basic and diluted earnings per share:
 
Three Months Ended
March 31,
 
2017
 
2016
Net Income
$
650

 
$
1,325

Weighted average shares outstanding:
 
 
 
Basic
18,628

 
18,448

Effect of dilutive securities:
 
 
 
Restricted stock units
431

 
328

Performance stock units
160

 
203

Diluted
19,219

 
18,979

Basic earnings per share
$
0.03

 
$
0.07

Diluted earnings per share
$
0.03

 
$
0.07