Schedule II - Valuation and Qualifying Accounts
|12 Months Ended|
Dec. 31, 2017
|Valuation and Qualifying Accounts [Abstract]|
|Schedule II - Valuation and Qualifying Accounts||
Valuation and Qualifying Accounts
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