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5. Notes Payable and Long-Term Debt (Tables)
 12 Months Ended
Dec. 31, 2018
Debt Disclosure [Abstract]  
Principal components of long-term debt [Table Text Block] The principal components of long-term debt are as follows (in millions):
 
December 31, 2018
 
December 31, 2017
 
 
 
 
4.875% Senior Notes due 2020, net of discount
$
425.0

 
$
425.0

Less unamortized discount and debt issuance costs
(1.3
)
 
(1.9
)
Long-term debt less unamortized discount and debt issuance costs
423.7

 
423.1

Capital leases and other debt
15.7

 
11.9

 
439.4

 
435.0

Less current maturities
(0.5
)
 
(0.4
)
Long-term debt
$
438.9

 
$
434.6