Item 15 (Notes)
|12 Months Ended|
Dec. 31, 2018
|SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]|
|SEC Schedule, 12-09, Schedule of Valuation and Qualifying Accounts Disclosure [Text Block]||
SCHEDULE II – VALUATION AND QUALIFYING ACCOUNTS (in thousands):
The entire disclosure for valuation and qualifying accounts and reserves.
Reference 1: http://www.xbrl.org/2003/role/disclosureRef