Quarterly report pursuant to Section 13 or 15(d)

Condensed Balance Sheets (Parenthetical)

v3.8.0.1
Condensed Balance Sheets (Parenthetical) - USD ($)
$ in Thousands
Mar. 31, 2018
Dec. 31, 2017
Statement of Financial Position [Abstract]    
Customer receivables, allowances $ 9,743 $ 9,465
Common stock, par value $ 0.13 $ 0.10
Common stock, shares authorized 140,000,000 140,000,000
Common stock, shares outstanding 82,284,180 82,375,945