XML 13 R3.htm IDEA: XBRL DOCUMENT v3.10.0.1
CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($)
$ in Thousands
Jun. 30, 2018
Dec. 31, 2017
Statement of Financial Position [Abstract]    
Account receivable, allowances aggregating $ 34,033 $ 27,799
Closure and post-closure liabilities, current portion 6,514 6,444
Remedial liabilities, current portion $ 16,493 $ 13,338
Common stock, par value (in USD per share) $ 0.01 $ 0.01
Common stock, authorized shares (in shares) 80,000,000 80,000,000
Common stock, issued shares (in shares) 56,087,256 56,501,190
Common stock, outstanding shares (in shares) 56,087,256 56,501,190