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Earnings Per Share (Tables)
 12 Months Ended
Dec. 31, 2018
Earnings Per Share [Abstract]  
EPS Calculation [Table Text Block]
NW Holdings' diluted earnings or loss per share are calculated as follows:
In thousands, except per share data
 
2018
 
2017
 
2016
Net income from continuing operations
 
$
67,311

 
$
72,073

 
$
62,419

Loss from discontinued operations, net of tax
 
(2,742
)
 
(127,696
)
 
(3,524
)
Net income (loss)
 
$
64,569

 
$
(55,623
)
 
$
58,895

Average common shares outstanding - basic
 
28,803

 
28,669

 
27,647

Additional shares for stock-based compensation plans (See Note 7)
 
70

 
84

 
132

Average common shares outstanding - diluted
 
28,873

 
28,753

 
27,779

Earnings (loss) from continuing operations per share of common stock:
 
 
 
 
 
 
Basic
 
$
2.34

 
$
2.51

 
$
2.26

Diluted
 
$
2.33

 
$
2.51

 
$
2.25

Loss from discontinued operations per share of common stock:
 
 
 
 
 
 
Basic
 
$
(0.10
)
 
$
(4.45
)
 
$
(0.13
)
Diluted
 
$
(0.09
)
 
$
(4.44
)
 
$
(0.13
)
Earnings (loss) per share of common stock:
 
 
 
 
 
 
Basic
 
$
2.24

 
$
(1.94
)
 
$
2.13

Diluted
 
$
2.24

 
$
(1.93
)
 
$
2.12

Additional information:
 
 
 
 
 
 
Antidilutive shares
 
2

 
13

 
5