Item 15 (Notes)
|12 Months Ended|
Dec. 31, 2017
|Valuation and Qualifying Accounts [Abstract]|
|Schedule of Valuation and Qualifying Accounts Disclosure [Text Block]||
SCHEDULE II – VALUATION AND QUALIFYING ACCOUNTS (in thousands):
The entire disclosure for any allowance and reserve accounts (their beginning and ending balances, as well as a reconciliation by type of activity during the period). Alternatively, disclosure of the required information may be within the footnotes to the financial statements or a supplemental schedule to the financial statements.
Reference 1: http://www.xbrl.org/2003/role/presentationRef