Annual report pursuant to Section 13 and 15(d)

CONSOLIDATED STATEMENTS OF FINANCIAL POSITION (Parenthetical)

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CONSOLIDATED STATEMENTS OF FINANCIAL POSITION (Parenthetical) - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Statement of Financial Position [Abstract]    
Trade receivables, allowance for doubtful accounts $ 11,814 $ 11,443
Financing receivables, short-term, allowance for doubtful accounts 1,535 1,727
Financing receivables, long-term, allowance for doubtful accounts $ 1,357 $ 1,430
Preferred stock, authorized (in shares) 500,000 500,000
Preferred stock, issued (in shares) 0 0
Common stock, par value (in dollars per share) $ 1 $ 1
Common stock, authorized (in shares) 375,000,000 375,000,000
Common stock, issued (in shares) 217,992,177 217,791,511