XML 17 R3.htm IDEA: XBRL DOCUMENT v3.7.0.1
CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) (Unaudited) - USD ($)
$ in Thousands
Jun. 30, 2017
Dec. 31, 2016
Statement Of Financial Position [Abstract]    
Allowance for doubtful accounts $ 2,423 $ 1,342
Common stock, par value $ 1.50 $ 1.50
Common stock, shares authorized 200,000,000 200,000,000
Common stock, shares issued 24,934,981 24,934,981
Common stock, shares outstanding 24,934,981 24,934,981
Treasury stock, shares 4,530,396 4,613,520