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Other Intangible Assets (Tables)
 12 Months Ended
Dec. 31, 2016
Other Intangible Assets [Abstract]  
Schedule of Goodwill [Table Text Block]
Changes in goodwill and other intangible assets for the year ended December 31, 2016 and 2015 are provided in the following table:
Dollar amounts in millions
2016
 
2015
 
Timber and timberlands
Goodwill
Total
 
Timber and timberlands
Goodwill
Total
Beginning balance December 31,
$
50.4

$
9.7

$
60.1

 
$
64.9

$
9.7

$
74.6

Amortization
(3.3
)
—

(3.3
)
 
(2.9
)
—

(2.9
)
Impairments
—

—

—

 
(11.6
)
—

(11.6
)
Total goodwill and other intangibles
$
47.1

$
9.7

$
56.8

 
$
50.4

$
9.7

$
60.1
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]
Amortization of the above intangible assets over the next five years is as follows:
Dollar amounts in millions
 
Year ended December 31,
 
2017
$
3.2

2018
3.2

2019
3.2

2020
3.2

2021
3.2